CA2068217C - Apparatus for guiding a piece of timber to a machine tool - Google Patents
Apparatus for guiding a piece of timber to a machine toolInfo
- Publication number
- CA2068217C CA2068217C CA002068217A CA2068217A CA2068217C CA 2068217 C CA2068217 C CA 2068217C CA 002068217 A CA002068217 A CA 002068217A CA 2068217 A CA2068217 A CA 2068217A CA 2068217 C CA2068217 C CA 2068217C
- Authority
- CA
- Canada
- Prior art keywords
- block
- rollers
- pair
- roll
- feed
- 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.)
- Expired - Fee Related
Links
- 238000006073 displacement reaction Methods 0.000 claims 6
- 238000011144 upstream manufacturing Methods 0.000 claims 5
- 230000001360 synchronised effect Effects 0.000 claims 4
- 230000008602 contraction Effects 0.000 claims 3
- 238000007514 turning Methods 0.000 description 19
- 239000002023 wood Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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
- B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
- B27B1/007—Methods for subdividing trunks or logs essentially involving sawing taking into account geometric properties of the trunks or logs to be sawn, e.g. curvature
-
- 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
- B27B27/00—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon
- B27B27/08—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon arranged adjustably, not limited to only one of the groups B27B27/02 - B27B27/06
-
- 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
- B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
- B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
- B27C1/12—Arrangements for feeding work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
- B27L1/10—Debarking or removing vestiges of branches from trees or logs; Machines therefor using rotatable tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/007—Combined with manufacturing a workpiece
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
- Milling, Drilling, And Turning Of Wood (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Sawing (AREA)
- Manufacture Of Wood Veneers (AREA)
Abstract
An apparatus for guiding a piece of timber, especially a block (2) to be machined in a chipper canter. A chain conveyor (10) for conveying the block is provided in front of the chipper canter and at least one press roll (24, 26), for pressing the block against the chain conveyor. Between the chain conveyor and the chipper canter, there is a raisable and lowerable feed roll (14) which in its lower position is below the level of the chain conveyor and in its raised position is above said level. At an appropriate distance in front of and behind the chipper canter, there is a pair of side rollers (48, 50) the rollers of which (52, 56, 54, 58) can be pressed against the sides of the block in such a way that they center the block or move freely in the lateral direction.
Description
~O 91/07260 PCT/FlgO~00268 ~ 2~6~17 -APPARATUS FOR GUIDING A PIECE OF TIMBER TO A MACHINE TOOL
Field of invention ____ ~
5 The present invention relates to an apparatus for guiding a piece of= timber, especially a block, to a chipper canter, a sawing machine or the 1 ~ke machine tool for tredting the timber, the d~ala~us comprising a C:ullv~:yOl disposed in front of the machine tool, and feed rolls and side rollers 10 in front of and/or behind the machine tool.
Prior art In a known apparatus (SE pl-hl1~h~d patent application no.
346933 ), logs or blocks cut at two sides are orientated by 15 orientating means moving symmetrically in relation to the center line of the Cullv~yul and are fed in this orlentated position to a=sawing machine or a profile chipper cc"~ne.;~e~d to the apparatus. Thi~ ~entering positioning of the log or the like piece allows optimal use of wood in case t~le 2û log is not crooked, in otller words if the log is straight.
In order to achieve optima l use of wood when sawing crooked logs, the logs are usuall~y sawn in such a way that the loy is at first turned to direct its crooked portion upwards 25 or downwards subsequent to which a so-called block with two opposite plane surfac~s is formed of it by feeding it through a f irst sawing machine or a chipper can ter . The crooked block can then ~e fed along a crooked path through a second chipper canter to form a square timber r=lrh1 n~
30 at all side surfaces.
Many kinds of devices are known for guiding a crooked piece of timber to a sawing machine or- a profile chipper.
US Patent No. 4,440,203 discloses an apparatus for further 35 r--hlnln~ of the 1 ininiJ side surfaceg of a straight or a crooked block by a chipper canter provided with two chipping discs. There are two consecutive guiding side roller pairs mounted s on ~ an artlculated support arm in .... . .. _ _ _ _ _ ... .
~ WO9l/07260 20682 1 7 PCT/FI90/0026~
front of the chipping discs, the side rollers being movable D~ ~llcally ln relation to the center line of the support arm, ~ p~n~ng on the width of the block. Further, a guiding side roller pair is disposed in front of said S ~irst roller pairs, tl~ receive the block and, together with the first roller pairs, to center the top of the block after which the rollers are drawn apart. There is a second pair of centering anc~ guiding side rollers behind the ~h~r~ns digcs. When a crooked block moves the support 10 arm to the right or the left, both the chipping discs move in the same direction without a change in the distance between them. When a straight block is treated the ~hlrplns discs remain in a centered position. -Finnish p~-hl 1 ch-~tl patent ~pplication no. 76015 discloses an a~a~ a Lus in which three COllDt:~_U ~lve lateral orientating units- with two opposite orientating rollers are employed in front oi a sawing machine or a profile chipper to orientate the root end of a log or the like il.~L~duced in 20 the feeding point of the sawing machine or the profile chipper. The rolls of the foremost orientating unit which is closest to the ~iawing machine or the profile chipper are movable both symmetrically and asymmetrically. The orientating unit in the middle is a measuring device which 25 gives a signal indicating the degree of the lateral deviation of the log, t~e signal being used for guiding the OL~ - L orientatlng unit. The apparatus allows a curved sawiny line whlch at least to a certaln extent follows the curved form of the log.
US Patent No. 4,127, 04~g discloses ~m apparatus or sawing a crooked block into boards in a f rame saw in which the longitudinal configurat:ion of one gide surface, preferably the concave side surface, is sensed in front of the saw 35 and latersl pressure is exerted on the same side surface by a resiliently pressing orientating roller in order to orientate the block i~ relation to the saw 80 ag to saw the block parallel to 1 he sensed conf iguration whereby the 2 0 6 8 217 PCT~FI90/00268 orlentating rollers can serve as the sensing mesns as well. If the width and the crooked form of the block are equal along the whole length of the block it is theoretically possible to obtain the desired result. In 5 practice this is mostly not the case.
Finnish pllh~ h~rl patent application no . 68778 ~1 ~c1 nS~:
an apparatus for sawing crooked loys, the apparatus being provided with two pairs of guide rollers dlsposed spaced lO apart, the rollers of which are forced to move ~y LLlcally in pairs. A position sensor, for example a roller, is disposed in front of the S3uide roller pair, for senslng the side surface of the log and gives information on the crooked form of the log. At least one of the guide roller 15~ palrs is transferable in the direction transverse to the t feed direction of the log which allows sawing along the crooked center line of the log.
Prior art devices can produce a crooked block of a crooked 20 log or a gtraight blocl~ of a gtraight log but cannot produce a block of a desired crooked form of a crooked log .
Disclosure of invention ~ ~ _ 25 The object of the present invention is to provide a simple and efficient device which allows r--h1n1ntJ a straight or ~=
a crooked block in a way which is not r1p~lon~ nt on the conf iguration of the bloc]k .
30 It is also an object of the invention to provide a device for r--hlnlng pieces of timber in a predetPrm1n~fl way.
This is achieved by the C~!yaLc-~us of the pre8ent invention whlch is characteri2ed in that in front of the machine 35 tool, there is a chain ~ v~yuL carrying the piece of timber; at least one press roll provided with means for pressing the piece ~of timeber a~ainst the chain ~UIlV~y~L by means of said rol} or ~ iftin~ thè~ roll off from the , ~ W091/07260 20~82 1 7 PCr/Fl91~/002(~
piece of timber; a fe!ed roll disposed subsequent to the chain ~;V1.VC:yv., whic~l roll is provided with means for lifting or lowering sald roll and w}lich roll in its lower position is below the level of the chain c~J11v~y~JL and ln 5 its upper position abo~e said level; a p2ir of side rollers the rollers of which are flicpnc~l each on different sides of the block nnd provided with means for pressing said rollers against opposlte side of the block either in a manner centering the block or moving ireely in the 10 L.c...~v~L~e direction and that behind the machine tool, there i8 a second palr of side rollers the rollers of which are ~l~F2pnc~rl each on different sides of the block and provided with means for pressing said rollers against the opposite sides of the block either in a manner centeriny 15 the block or moving freely in transverse direction.
The apparatus preferably comprises a ~ nn1~ 1 roll, i.e., for example, a roll with reduced rll L~{ center and wall portions diverging outwardly therefrom, provided with 20 means for pressing th~ piece of timber by means of the biconical roll against a feed roll which is in its upper position .
In an ~mhnrll -t of the invention the rollers of the side 25 roller pairs are mounted on bearings in turning arms coupled with each other via a connecting bar which comprises two piston- cylinder units which are rigidly vv~lne~L~:d to each othel- at their back walls and the piston rods o~ which nre connected to turning arms in such n 30 way that one of the piston arms is connected to a turning arm or a member turni~lg in a similar way, and the other pi6ton is conn-?ct~od to the portion of 21 t~/~ p~. Lioned turning arm, which is situated further away from the roller of the two-portioned arm, or to a member turning in 2 35 similar way.
., WO 91/07260 PCl /FI~O/OOZ68 2~6821~
Brief description of drawings The details of the invention are disclosed, by way of example, in the followil~g description and drawings which illustrate s~' I,lcally an ~--t- t of the invention.
Figure 1 is a schematic side view of an apparatus according to the invention;
Figure 2 is a view of the apparatus of Fig. 1 viewed from above, 10 Figure ~' is a section àl~ng line A - A of Figure 1, Figure ' is a view of the apparatus in the direction of arrow B in Figure l; and Figure 5 is an enlarged fragmentary illustration of details C and D : n Figure 2 .
Detailec desc:,ription of drawings In the ~pparatus illustrated in the drawings, a block 2_ r?chln~r at two opposite side surfaces ls formed into a four-edged block or a sguare timber 2b whlch ls r--hln~l 20 at all lts four side surfaces by ~--hlnlnr it further ln a chipper canter 6 know per se and provided with two chipping discs 4 . The chip~ ing discs are movable in relation to the center line 8 of th~ chipper each with its own servo means 7.
In front of the chipper, a chain Cullv~:yul 10 is provided on which 1 es the block 2a to be introduced into the chipper canter. The chain ~UIlVUyuL comprises a plurality of chains 12 disE~osed side by side which preferably are provided 30 with spikes for gripping the block while the block is pressed against the uullv~yur by means of press rolls 24, 26. A raisable and lowerable feed roll 14 is provided between the chain .~ veyur 10 and the chipper canter 6 which roll in its lower position is below the level of the 35 OUIIV~YUL and in lts upper position above said level. The feed roll 14 is mounted on bearings in turning arms 16. The turning arms are moved by a piston-cylinder unit 18 which is filled with a pressure medium and are controlled by a .
?Q6~ 6 control unit 20 . , There is a second feed roll 22 behind the chipper canter 6 on which roll the r-~-h;nf~9 block 2_ lies .
5 Above the chain ~,U~V~:yul 10, there are press rolls 24 and 26 mounted on bearings in turning arms 28 and 30, which are moved by piston-cylinder units 32 and 34 which in turn are controllable by the control unit 20 in such a way that the rolls either press the block against the chain Cullv~:yUL
10 or do not touch the block.
A biconical roll 36 mounted on bearings in turning arms 38 is disposed above the feed roll 14, the t~lrning arms being moved by a piston-cylinder unit 40 which are 15 controlled by the control unit 20 to cause ~ he roll to press the block against the feed roll 14 while :he roll is in its upper position.
Above the feed roll 22, there is a press roll 42 mounted 20 on bearings in turning arms 44 which are moved by a piston-cylinder unit 46. The control unit 20 controls the unit 46 which causes the roll to press ~the block against the roll or lifts the roll off from the block.
25 At a suitable distance from the chipping discs 4 on the feed side of the chipper canter 6, a pair of side rollers 48 is provided the rollers 52 and 56 of which are disposed each on different sides of the block. Correspondingly, on the discharge side of the chipper canter at a suitable 30 distance from the chipping discs, a pair of side rollers 50 is provided the rollers 54 and 58 of which are disposed each on different sides=of the block. The side rollers 52, 54 and 56, 58 are .;u- - e.;~:d in a way known per se to drive means which are not illustrated here. The rollers 35 of both the side roller pairs are in the way illustrated in figure 5 mounted on bearings in turning arms 60 and 62 connected to each other by a connecting bar 69, which comprises two piston-cylinder units 66 and 68 rigidly ~ WO 91/072611 2 0 6 8 2 T 7 : Pcr/Fl9n/oo26~
w1~nec ~d to each other at their back walls . The piston rod~ 70 and 72 of the piston-cylinder units are turnably or pivotally ~, -u-e~Le~ to turnings zlrms ~0, 62 in such a way thAt one of th~ piston, 70, is cnnnDct~d through 5 an ~rticulsted joint t1~ one of the turnlng arms, 60, and the other piston, 72, i~s ConnDrt~ t through ~m articul~ted joint to ~he ~rm portLon 63 of the two-portloned turning arm 62 which lies further away from the roll.
lO Further, the turning arms are interconnected by means of a piston-cyl$nder unit 7~ a back wall 76 of which is pivotally or turnably connected to one of the turning arms, 62, and the piston 78 to the other arm, 60. The control unit 20 controls the piston-cylinder units 66, 68 and 74. It is 15 clear that the turning arms can be cu~ t by -means of turning shafts to levers turning in the same direction as the turning arms whereby the piston-cylinder uni~s can be connected to these levers.
20 The location of the articulated points of the connecting bar and the dimensions of the piston-cylinder unit are chosen such that when the piston 80 of the cylinder 66 is in its outmost positia~n and tl~e piston 82 of the cylinder 68 in its ~ nn~ _ 1, position as illustrated in the figure, 25 and the cylinders are pressurized so that in effect they form a rigid bar, the side rollers 52, 54 and 56, 58 are moved ,y 1.~ lcally ir~ relation to the center line 8 by the piston-cylinder unit 74.
When it is desired that the side rollers 52, 54 and 56, 58 can move to an eccentric position in lateral direction the pressure is released Erom the cylinders 66 and 68 which re8ults in the piston-~ylinder unit 74 pulling the rollers to the suriace of the block. The rollers can thus feed the block but not guide it in the lateral direction. The function of the piston--cylinder units is floating.
.. ,~;~ .
, . ~
i WO 91/07260 ~- PCr/FI90/OOZ68 The appar~tus is provided wlth a necessary number of deL~,Lu, ~. the operat$on of whlch ls preferably not based on contact, for example optlcal d~:~e1LoIs, whlch detect passing of the leadlng end or the rear end of the block 5 and glve a signal to t}~e control unit 20.
The a~,~aL c. Lu, is .;o-~ Li u~ ~ed and controlled to functlon in the followlng ways: the chlpplng dlscs 4 belng set to a predetermlned setting sy-mmetrically ln relatlon to the 10 center llne 8:-A. Stralght sawlng The block 2 is pressed by means of press rolls 24 and 26~Igainst the o~,..v~ chAins 12 whereby the chain ccrlvtSyuL
10 guldes the block. The slde rollers 52 and 56 ln front of the chipper canter press the sides of the , ^h; nr-d blocks but do not gulde the block. The side rollers 54 and 58 behlnd the chlpper canter press the r~-h~netl sldes of the block and guide and center the block. The biconical 20 roll 36 has been lifted and the feed roll 14 lowered.
Field of invention ____ ~
5 The present invention relates to an apparatus for guiding a piece of= timber, especially a block, to a chipper canter, a sawing machine or the 1 ~ke machine tool for tredting the timber, the d~ala~us comprising a C:ullv~:yOl disposed in front of the machine tool, and feed rolls and side rollers 10 in front of and/or behind the machine tool.
Prior art In a known apparatus (SE pl-hl1~h~d patent application no.
346933 ), logs or blocks cut at two sides are orientated by 15 orientating means moving symmetrically in relation to the center line of the Cullv~yul and are fed in this orlentated position to a=sawing machine or a profile chipper cc"~ne.;~e~d to the apparatus. Thi~ ~entering positioning of the log or the like piece allows optimal use of wood in case t~le 2û log is not crooked, in otller words if the log is straight.
In order to achieve optima l use of wood when sawing crooked logs, the logs are usuall~y sawn in such a way that the loy is at first turned to direct its crooked portion upwards 25 or downwards subsequent to which a so-called block with two opposite plane surfac~s is formed of it by feeding it through a f irst sawing machine or a chipper can ter . The crooked block can then ~e fed along a crooked path through a second chipper canter to form a square timber r=lrh1 n~
30 at all side surfaces.
Many kinds of devices are known for guiding a crooked piece of timber to a sawing machine or- a profile chipper.
US Patent No. 4,440,203 discloses an apparatus for further 35 r--hlnln~ of the 1 ininiJ side surfaceg of a straight or a crooked block by a chipper canter provided with two chipping discs. There are two consecutive guiding side roller pairs mounted s on ~ an artlculated support arm in .... . .. _ _ _ _ _ ... .
~ WO9l/07260 20682 1 7 PCT/FI90/0026~
front of the chipping discs, the side rollers being movable D~ ~llcally ln relation to the center line of the support arm, ~ p~n~ng on the width of the block. Further, a guiding side roller pair is disposed in front of said S ~irst roller pairs, tl~ receive the block and, together with the first roller pairs, to center the top of the block after which the rollers are drawn apart. There is a second pair of centering anc~ guiding side rollers behind the ~h~r~ns digcs. When a crooked block moves the support 10 arm to the right or the left, both the chipping discs move in the same direction without a change in the distance between them. When a straight block is treated the ~hlrplns discs remain in a centered position. -Finnish p~-hl 1 ch-~tl patent ~pplication no. 76015 discloses an a~a~ a Lus in which three COllDt:~_U ~lve lateral orientating units- with two opposite orientating rollers are employed in front oi a sawing machine or a profile chipper to orientate the root end of a log or the like il.~L~duced in 20 the feeding point of the sawing machine or the profile chipper. The rolls of the foremost orientating unit which is closest to the ~iawing machine or the profile chipper are movable both symmetrically and asymmetrically. The orientating unit in the middle is a measuring device which 25 gives a signal indicating the degree of the lateral deviation of the log, t~e signal being used for guiding the OL~ - L orientatlng unit. The apparatus allows a curved sawiny line whlch at least to a certaln extent follows the curved form of the log.
US Patent No. 4,127, 04~g discloses ~m apparatus or sawing a crooked block into boards in a f rame saw in which the longitudinal configurat:ion of one gide surface, preferably the concave side surface, is sensed in front of the saw 35 and latersl pressure is exerted on the same side surface by a resiliently pressing orientating roller in order to orientate the block i~ relation to the saw 80 ag to saw the block parallel to 1 he sensed conf iguration whereby the 2 0 6 8 217 PCT~FI90/00268 orlentating rollers can serve as the sensing mesns as well. If the width and the crooked form of the block are equal along the whole length of the block it is theoretically possible to obtain the desired result. In 5 practice this is mostly not the case.
Finnish pllh~ h~rl patent application no . 68778 ~1 ~c1 nS~:
an apparatus for sawing crooked loys, the apparatus being provided with two pairs of guide rollers dlsposed spaced lO apart, the rollers of which are forced to move ~y LLlcally in pairs. A position sensor, for example a roller, is disposed in front of the S3uide roller pair, for senslng the side surface of the log and gives information on the crooked form of the log. At least one of the guide roller 15~ palrs is transferable in the direction transverse to the t feed direction of the log which allows sawing along the crooked center line of the log.
Prior art devices can produce a crooked block of a crooked 20 log or a gtraight blocl~ of a gtraight log but cannot produce a block of a desired crooked form of a crooked log .
Disclosure of invention ~ ~ _ 25 The object of the present invention is to provide a simple and efficient device which allows r--h1n1ntJ a straight or ~=
a crooked block in a way which is not r1p~lon~ nt on the conf iguration of the bloc]k .
30 It is also an object of the invention to provide a device for r--hlnlng pieces of timber in a predetPrm1n~fl way.
This is achieved by the C~!yaLc-~us of the pre8ent invention whlch is characteri2ed in that in front of the machine 35 tool, there is a chain ~ v~yuL carrying the piece of timber; at least one press roll provided with means for pressing the piece ~of timeber a~ainst the chain ~UIlV~y~L by means of said rol} or ~ iftin~ thè~ roll off from the , ~ W091/07260 20~82 1 7 PCr/Fl91~/002(~
piece of timber; a fe!ed roll disposed subsequent to the chain ~;V1.VC:yv., whic~l roll is provided with means for lifting or lowering sald roll and w}lich roll in its lower position is below the level of the chain c~J11v~y~JL and ln 5 its upper position abo~e said level; a p2ir of side rollers the rollers of which are flicpnc~l each on different sides of the block nnd provided with means for pressing said rollers against opposlte side of the block either in a manner centering the block or moving ireely in the 10 L.c...~v~L~e direction and that behind the machine tool, there i8 a second palr of side rollers the rollers of which are ~l~F2pnc~rl each on different sides of the block and provided with means for pressing said rollers against the opposite sides of the block either in a manner centeriny 15 the block or moving freely in transverse direction.
The apparatus preferably comprises a ~ nn1~ 1 roll, i.e., for example, a roll with reduced rll L~{ center and wall portions diverging outwardly therefrom, provided with 20 means for pressing th~ piece of timber by means of the biconical roll against a feed roll which is in its upper position .
In an ~mhnrll -t of the invention the rollers of the side 25 roller pairs are mounted on bearings in turning arms coupled with each other via a connecting bar which comprises two piston- cylinder units which are rigidly vv~lne~L~:d to each othel- at their back walls and the piston rods o~ which nre connected to turning arms in such n 30 way that one of the piston arms is connected to a turning arm or a member turni~lg in a similar way, and the other pi6ton is conn-?ct~od to the portion of 21 t~/~ p~. Lioned turning arm, which is situated further away from the roller of the two-portioned arm, or to a member turning in 2 35 similar way.
., WO 91/07260 PCl /FI~O/OOZ68 2~6821~
Brief description of drawings The details of the invention are disclosed, by way of example, in the followil~g description and drawings which illustrate s~' I,lcally an ~--t- t of the invention.
Figure 1 is a schematic side view of an apparatus according to the invention;
Figure 2 is a view of the apparatus of Fig. 1 viewed from above, 10 Figure ~' is a section àl~ng line A - A of Figure 1, Figure ' is a view of the apparatus in the direction of arrow B in Figure l; and Figure 5 is an enlarged fragmentary illustration of details C and D : n Figure 2 .
Detailec desc:,ription of drawings In the ~pparatus illustrated in the drawings, a block 2_ r?chln~r at two opposite side surfaces ls formed into a four-edged block or a sguare timber 2b whlch ls r--hln~l 20 at all lts four side surfaces by ~--hlnlnr it further ln a chipper canter 6 know per se and provided with two chipping discs 4 . The chip~ ing discs are movable in relation to the center line 8 of th~ chipper each with its own servo means 7.
In front of the chipper, a chain Cullv~:yul 10 is provided on which 1 es the block 2a to be introduced into the chipper canter. The chain ~UIlVUyuL comprises a plurality of chains 12 disE~osed side by side which preferably are provided 30 with spikes for gripping the block while the block is pressed against the uullv~yur by means of press rolls 24, 26. A raisable and lowerable feed roll 14 is provided between the chain .~ veyur 10 and the chipper canter 6 which roll in its lower position is below the level of the 35 OUIIV~YUL and in lts upper position above said level. The feed roll 14 is mounted on bearings in turning arms 16. The turning arms are moved by a piston-cylinder unit 18 which is filled with a pressure medium and are controlled by a .
?Q6~ 6 control unit 20 . , There is a second feed roll 22 behind the chipper canter 6 on which roll the r-~-h;nf~9 block 2_ lies .
5 Above the chain ~,U~V~:yul 10, there are press rolls 24 and 26 mounted on bearings in turning arms 28 and 30, which are moved by piston-cylinder units 32 and 34 which in turn are controllable by the control unit 20 in such a way that the rolls either press the block against the chain Cullv~:yUL
10 or do not touch the block.
A biconical roll 36 mounted on bearings in turning arms 38 is disposed above the feed roll 14, the t~lrning arms being moved by a piston-cylinder unit 40 which are 15 controlled by the control unit 20 to cause ~ he roll to press the block against the feed roll 14 while :he roll is in its upper position.
Above the feed roll 22, there is a press roll 42 mounted 20 on bearings in turning arms 44 which are moved by a piston-cylinder unit 46. The control unit 20 controls the unit 46 which causes the roll to press ~the block against the roll or lifts the roll off from the block.
25 At a suitable distance from the chipping discs 4 on the feed side of the chipper canter 6, a pair of side rollers 48 is provided the rollers 52 and 56 of which are disposed each on different sides of the block. Correspondingly, on the discharge side of the chipper canter at a suitable 30 distance from the chipping discs, a pair of side rollers 50 is provided the rollers 54 and 58 of which are disposed each on different sides=of the block. The side rollers 52, 54 and 56, 58 are .;u- - e.;~:d in a way known per se to drive means which are not illustrated here. The rollers 35 of both the side roller pairs are in the way illustrated in figure 5 mounted on bearings in turning arms 60 and 62 connected to each other by a connecting bar 69, which comprises two piston-cylinder units 66 and 68 rigidly ~ WO 91/072611 2 0 6 8 2 T 7 : Pcr/Fl9n/oo26~
w1~nec ~d to each other at their back walls . The piston rod~ 70 and 72 of the piston-cylinder units are turnably or pivotally ~, -u-e~Le~ to turnings zlrms ~0, 62 in such a way thAt one of th~ piston, 70, is cnnnDct~d through 5 an ~rticulsted joint t1~ one of the turnlng arms, 60, and the other piston, 72, i~s ConnDrt~ t through ~m articul~ted joint to ~he ~rm portLon 63 of the two-portloned turning arm 62 which lies further away from the roll.
lO Further, the turning arms are interconnected by means of a piston-cyl$nder unit 7~ a back wall 76 of which is pivotally or turnably connected to one of the turning arms, 62, and the piston 78 to the other arm, 60. The control unit 20 controls the piston-cylinder units 66, 68 and 74. It is 15 clear that the turning arms can be cu~ t by -means of turning shafts to levers turning in the same direction as the turning arms whereby the piston-cylinder uni~s can be connected to these levers.
20 The location of the articulated points of the connecting bar and the dimensions of the piston-cylinder unit are chosen such that when the piston 80 of the cylinder 66 is in its outmost positia~n and tl~e piston 82 of the cylinder 68 in its ~ nn~ _ 1, position as illustrated in the figure, 25 and the cylinders are pressurized so that in effect they form a rigid bar, the side rollers 52, 54 and 56, 58 are moved ,y 1.~ lcally ir~ relation to the center line 8 by the piston-cylinder unit 74.
When it is desired that the side rollers 52, 54 and 56, 58 can move to an eccentric position in lateral direction the pressure is released Erom the cylinders 66 and 68 which re8ults in the piston-~ylinder unit 74 pulling the rollers to the suriace of the block. The rollers can thus feed the block but not guide it in the lateral direction. The function of the piston--cylinder units is floating.
.. ,~;~ .
, . ~
i WO 91/07260 ~- PCr/FI90/OOZ68 The appar~tus is provided wlth a necessary number of deL~,Lu, ~. the operat$on of whlch ls preferably not based on contact, for example optlcal d~:~e1LoIs, whlch detect passing of the leadlng end or the rear end of the block 5 and glve a signal to t}~e control unit 20.
The a~,~aL c. Lu, is .;o-~ Li u~ ~ed and controlled to functlon in the followlng ways: the chlpplng dlscs 4 belng set to a predetermlned setting sy-mmetrically ln relatlon to the 10 center llne 8:-A. Stralght sawlng The block 2 is pressed by means of press rolls 24 and 26~Igainst the o~,..v~ chAins 12 whereby the chain ccrlvtSyuL
10 guldes the block. The slde rollers 52 and 56 ln front of the chipper canter press the sides of the , ^h; nr-d blocks but do not gulde the block. The side rollers 54 and 58 behlnd the chlpper canter press the r~-h~netl sldes of the block and guide and center the block. The biconical 20 roll 36 has been lifted and the feed roll 14 lowered.
3. Acute crooked sawing The press rolls 24 a~ld 26 have been lifted up. The h;c-~nir.;~1 roll 36 presses the block agalnst the feed roll 25 14 which has been raised. The chain co..v.:yur does not guide the block. The side rollers 52 and 56 in front of the chipper canter press, guide ~nd center the block.
The slde rollers 54 and 58 behlnd the chipper canter press the block but do not guide lt.
C. Limited crooked sawimg The press rolls 24 ~nd Z6 have been raised. The bicnn~
roll 36 and the feed roll 14 are controlled to operate for a short while in the middle region of the block. The side 35 rollers 52 and 56 in front of the chipper canter press the block but do not guide it . D~penfl ~ n~ on the desired ~;~ UrL~ cq, the side rollers 54 and 58 behind the chipper canter can b~ employ~d l o ~VO 9l/07260 PCF/FI90/00268 ~06~217 . g a) at first press and center the block and after that press the block without guidlng lt;
b ) press and center the block all the time, or c ) press the block all the time without guiding it .
The invention makes po~3sible machining the sides of a crooked block in a way PLUY~ ~ ~ in the control unit, corr-~spnnrli ng to the crookedness ûf the block or deviating from it.
It is clear that the embodiment of the iilvention described abûve and illustrated in the figures ls an example, only, of the way the invention c2n be carried out and that the invention can be modified within the sc ~pe of protection 15 defined by the patent claims. Thus, .-or example, the chipping discs can be replaced by sawing blades.
-
The slde rollers 54 and 58 behlnd the chipper canter press the block but do not guide lt.
C. Limited crooked sawimg The press rolls 24 ~nd Z6 have been raised. The bicnn~
roll 36 and the feed roll 14 are controlled to operate for a short while in the middle region of the block. The side 35 rollers 52 and 56 in front of the chipper canter press the block but do not guide it . D~penfl ~ n~ on the desired ~;~ UrL~ cq, the side rollers 54 and 58 behind the chipper canter can b~ employ~d l o ~VO 9l/07260 PCF/FI90/00268 ~06~217 . g a) at first press and center the block and after that press the block without guidlng lt;
b ) press and center the block all the time, or c ) press the block all the time without guiding it .
The invention makes po~3sible machining the sides of a crooked block in a way PLUY~ ~ ~ in the control unit, corr-~spnnrli ng to the crookedness ûf the block or deviating from it.
It is clear that the embodiment of the iilvention described abûve and illustrated in the figures ls an example, only, of the way the invention c2n be carried out and that the invention can be modified within the sc ~pe of protection 15 defined by the patent claims. Thus, .-or example, the chipping discs can be replaced by sawing blades.
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Claims (10)
1. An apparatus for guiding a block of timber to a machine tool, the apparatus comprising:
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a feed/support member for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a feed/support member for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
2. An apparatus for guiding a block of timber to a machine tool, the apparatus comprising:
(a) a chain conveyor, the chains of which conveyor are provided with spikes, for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a feed/support member for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the lollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
(a) a chain conveyor, the chains of which conveyor are provided with spikes, for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a feed/support member for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the lollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
3. An apparatus for guiding a block of timber to a chipper canter, the apparatus comprising:
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the chipper canter;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the chipper canter, a feed/support member for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the chipper canter a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the chipper canter;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the chipper canter, a feed/support member for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the chipper canter a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
4. An apparatus for guiding a block of timber to a machine tool, the apparatus comprising:
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a raisable and lowerable feed roll for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said raisable and lowerable feed roll is disposed downstream of said chain conveyor and is provided with means for raising said raisable and lowerable feed roll to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with a biconical roll for selectively engaging the block above the raisable and lowerable feed roll in order to press the block against the raisable and lowerable feed roll;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a raisable and lowerable feed roll for supporting the block at said machined bottom surface, and a pair of side rollers;
(i) said raisable and lowerable feed roll is disposed downstream of said chain conveyor and is provided with means for raising said raisable and lowerable feed roll to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with a biconical roll for selectively engaging the block above the raisable and lowerable feed roll in order to press the block against the raisable and lowerable feed roll;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
5. An apparatus for guiding a block of timber to a machine tool, the apparatus comprising:
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a feed/support member for supporting the block at said machined bottom surface, a pair of side rollers and a bi-conical roll;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1 ) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(iii) said bi-conical roll is provided for pressure developing means for urging the bi-conical roll against the block in order to press the block against the feed/support member while said member is in a raised position;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
(a) a chain conveyor for conveying a block of timber which comprises a generally planar machined bottom surface and unmachined sides in front of the machine tool;
(b) at least one press roll provided with means for pressing the block by means of said roll against the chain conveyor or for lifting the roll off the block;
(c) at a location upstream of the machine tool, a feed/support member for supporting the block at said machined bottom surface, a pair of side rollers and a bi-conical roll;
(i) said feed/support member is disposed downstream of said chain conveyor and is provided with means for raising said feed/support member to an upper position above the level of the chain conveyor and for lowering said member to a lower position below said level and with means for selectively engaging the block above the feed-support member in order to press the block against the feed-support member;
(ii) the rollers of said pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the unmachined sides of the block;
(1 ) the rollers of said pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction;
(iii) said bi-conical roll is provided for pressure developing means for urging the bi-conical roll against the block in order to press the block against the feed/support member while said member is in a raised position;
(d) at a location downstream of the machine tool, a second pair of side rollers and a feed roll adapted to support the block and operatively associated with a press roll which is arranged to selectively press the block onto the feed roll or to be remote from the block;
(i) the rollers of said second pair of side rollers are disposed each on different sides of the block and are provided with means for pressing each of said rollers against one of the machined sides of the block;
(1) the rollers of said second pair of side rollers are arranged in such a way that they either center the block or move freely in lateral direction.
6. An apparatus as claimed in any one of the preceding claims, wherein the rollers of said pail of side rollers are driven by motors.
7. An apparatus as claimed in any one of claims 1 - 5, wherein (a) the rollers of the side roller pairs are each rotatably mounted in a bearingproximate one end of a swing lever pivotable about a respective first or second swing pivot;
(b) said swing levers being comprised of a first lever and a second lever, (c) said second lever includes a second arm generally opposite to whereby the second lever is a two-arm lever pivotable about the second swing pivot;
(d) the levers are connected to each other by a selectively contractible or extensible connecting means;
(e) a first end of said connecting means is pivotably secured to the first lever at a first connecting pivot disposed between the swing pivot of the first lever and the respective bearing, a second end of the first connecting means being pivotably secured to the second arm of the second lever at a second connecting pivot such that the contraction of the first connecting means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same first direction, and the contraction of the first connecting means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same second direction opposite to said first direction.
(b) said swing levers being comprised of a first lever and a second lever, (c) said second lever includes a second arm generally opposite to whereby the second lever is a two-arm lever pivotable about the second swing pivot;
(d) the levers are connected to each other by a selectively contractible or extensible connecting means;
(e) a first end of said connecting means is pivotably secured to the first lever at a first connecting pivot disposed between the swing pivot of the first lever and the respective bearing, a second end of the first connecting means being pivotably secured to the second arm of the second lever at a second connecting pivot such that the contraction of the first connecting means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same first direction, and the contraction of the first connecting means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same second direction opposite to said first direction.
8. An apparatus as claimed in claim 7, further comprising second contractible connecting means pivotably secured to the first and second lever such that the contracting of the second connecting means results in a generally simultaneous displacement of the rollers of the respective pair towards each other and vice-versa.
9. An apparatus as claimed in any one of claims 1 - 5, wherein (a) the rollers of the side roller pairs are each rotatably mounted in a bearingproximate one end of a swing lever pivotable about a respective first or second swing pivot;
(b) said swing levers are comprised of a first lever and a second lever, (c) said second lever includes a second arm generally opposite to a first arm thereof whereby the second lever is a two-arm lever pivotable about the second swing pivot;
(d) the levers are connected to each other by a selectively contractible or extensible piston-cylinder means;
(e) a first end of said piston-cylinder means is pivotably secured to the first lever at a first connecting pivot disposed between the swing pivot of the first lever and the respective bearing, a second end of the piston-cylinder means being pivotably secured to the second arm of the second lever at a second connecting pivot such that the contraction of the piston-cylinder means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same first direction, and the extension of the piston-cylinder means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same second direction, which is opposite to said first direction.
(b) said swing levers are comprised of a first lever and a second lever, (c) said second lever includes a second arm generally opposite to a first arm thereof whereby the second lever is a two-arm lever pivotable about the second swing pivot;
(d) the levers are connected to each other by a selectively contractible or extensible piston-cylinder means;
(e) a first end of said piston-cylinder means is pivotably secured to the first lever at a first connecting pivot disposed between the swing pivot of the first lever and the respective bearing, a second end of the piston-cylinder means being pivotably secured to the second arm of the second lever at a second connecting pivot such that the contraction of the piston-cylinder means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same first direction, and the extension of the piston-cylinder means results in a simultaneous and generally synchronous displacement of both rollers of the respective pair in the same second direction, which is opposite to said first direction.
10. An apparatus as claimed in claim 9, further comprising second contractible piston-cylinder means pivotably secured to the first and second lever such that the contracting of the second piston-cylinder means results in a generally simultaneous displacement of the rollers of the respective pair towards each other and vice-versa.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI895398 | 1989-11-13 | ||
| FI895398A FI83847C (en) | 1989-11-13 | 1989-11-13 | ANORDNING FOER STYRNING AV BLOCK SOM MATAS TILL EN BEARBETNINGSMASKIN. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2068217A1 CA2068217A1 (en) | 1991-05-14 |
| CA2068217C true CA2068217C (en) | 1996-10-29 |
Family
ID=8529336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002068217A Expired - Fee Related CA2068217C (en) | 1989-11-13 | 1990-11-13 | Apparatus for guiding a piece of timber to a machine tool |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2068217C (en) |
| FI (1) | FI83847C (en) |
| SE (1) | SE507389C2 (en) |
| WO (1) | WO1991007260A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9168669B2 (en) | 2013-02-22 | 2015-10-27 | Usnr, Llc | Double arbor vertical shape saw |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE469972B (en) * | 1991-04-22 | 1993-10-18 | Soederhamns Verkstaeder Ab | Process and plant for processing of logs |
| CA2827151C (en) * | 2012-10-17 | 2016-07-26 | Usnr/Kockums Cancar Company | Workpiece positioning system |
| CN104149138B (en) * | 2013-05-15 | 2016-05-04 | 南京林业大学 | A kind of feed mechanism of positive hexagonal prism forming machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE334460B (en) * | 1969-05-14 | 1971-04-26 | Lindqvist Brdr Maskin Ab | |
| SE420579B (en) * | 1976-02-16 | 1981-10-19 | Skogsegarnas Vaenerind | HOOK CUTTING HOOK DEVICE |
| FI59546C (en) * | 1978-10-13 | 1981-09-10 | Ahlstroem Oy | ANORDNING FOER STYRNING AV BRAEDER TILL ETT KANTVERK |
| SE431621B (en) * | 1980-07-03 | 1984-02-20 | Kockums Ind Ab | DEVICE FOR INSTALLATION OF WOOD BLOCK LONG A LOADING ROAD IN A WOODWORKING MACHINE |
| DE3137401C2 (en) * | 1981-09-19 | 1986-12-11 | Gebrüder Linck, Maschinenfabrik und Eisengießerei "Gatterlinck", 7602 Oberkirch | Device for aligning logs in the inlet of a saw or profile cutting machine |
| US4881584A (en) * | 1989-01-09 | 1989-11-21 | Weyerhaeuser Company | Infeed conveyor for saw |
-
1989
- 1989-11-13 FI FI895398A patent/FI83847C/en active IP Right Grant
-
1990
- 1990-11-13 CA CA002068217A patent/CA2068217C/en not_active Expired - Fee Related
- 1990-11-13 WO PCT/FI1990/000268 patent/WO1991007260A1/en active Application Filing
-
1992
- 1992-05-13 SE SE9201510A patent/SE507389C2/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9168669B2 (en) | 2013-02-22 | 2015-10-27 | Usnr, Llc | Double arbor vertical shape saw |
| US9724839B2 (en) | 2013-02-22 | 2017-08-08 | Usnr, Llc | Double arbor vertical shape saw |
Also Published As
| Publication number | Publication date |
|---|---|
| SE9201510D0 (en) | 1992-05-13 |
| FI895398A0 (en) | 1989-11-13 |
| CA2068217A1 (en) | 1991-05-14 |
| SE507389C2 (en) | 1998-05-25 |
| WO1991007260A1 (en) | 1991-05-30 |
| FI83847B (en) | 1991-05-31 |
| SE9201510L (en) | 1992-05-13 |
| FI83847C (en) | 1991-09-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |