CA2051916A1 - Apparatus for dividing wood - Google Patents
Apparatus for dividing woodInfo
- Publication number
- CA2051916A1 CA2051916A1 CA 2051916 CA2051916A CA2051916A1 CA 2051916 A1 CA2051916 A1 CA 2051916A1 CA 2051916 CA2051916 CA 2051916 CA 2051916 A CA2051916 A CA 2051916A CA 2051916 A1 CA2051916 A1 CA 2051916A1
- Authority
- CA
- Canada
- Prior art keywords
- saw
- wood
- clamping
- trestles
- saws
- 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.)
- Abandoned
Links
Landscapes
- Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
Abstract
Apparatus for Dividing Wood A B S T R A C T :
An apparatus for finishing wood (cants) comprises a circular saw (6) which can be reciprocated (double arrow 7) in the cutting plane (11), and several clamping trestles (1) for holding the piece of wood to be divided, these trestles being adjustable perpendicularly to the cutting plane (11) in order to set the cutting position. Furthermore, supports (3) are provided for the wood, wherein the lower clamping jaws (2) of the clamping trestles (1) can be lowered underneath the supports (3). The saw (6) is designed for forward and rearward cutting so that, with each stroke of the saw, a cut can be executed. For feeding the pieces of wood to be divided, inclined conveyor belts (13) are provided which deposit the pieces of wood on lifting tables (12), the latter then placing such pieces onto the supports (3) for the wood.
(Figure 2) .1.
An apparatus for finishing wood (cants) comprises a circular saw (6) which can be reciprocated (double arrow 7) in the cutting plane (11), and several clamping trestles (1) for holding the piece of wood to be divided, these trestles being adjustable perpendicularly to the cutting plane (11) in order to set the cutting position. Furthermore, supports (3) are provided for the wood, wherein the lower clamping jaws (2) of the clamping trestles (1) can be lowered underneath the supports (3). The saw (6) is designed for forward and rearward cutting so that, with each stroke of the saw, a cut can be executed. For feeding the pieces of wood to be divided, inclined conveyor belts (13) are provided which deposit the pieces of wood on lifting tables (12), the latter then placing such pieces onto the supports (3) for the wood.
(Figure 2) .1.
Description
CERTIFIED TRANSLATION
Title: APPARATUS FOR DIVIDING WOOD
Hans Payr in Feldkirchen/Poitschach (Karnten), AUSTRIA
Specification __.__________ The invention relates to an apparatus for dividing wood, particularly for finishing precut wood, with a device for holding the wood and with a saw dis-placeable in parallel to the longitudinal extension of the wood for executing the dividing work, wherein the device for holding the wood is adjustable transversely to the direction of movement of the saw in order to set the cutting position and exhibits clamping trestles with respectively two clamping jaws engaging the wood from above and from below.
Such apparatuses are utilized predominantly for the finishing of precut wood (cants). The saws used for the finishing step can be circular saws or band saws and are fixedly mounted in conventional facilities. In known facilities, it is the device for holding the wood to be divided which is adjustable transversely to the longitudinal extension of the wood, i.e. crosswise to the direction of the cut, for align-ing the wood with respect to the saw (setting of the cutting position), and is additionally movable in the direction of the wood for executing the sawing work.
Title: APPARATUS FOR DIVIDING WOOD
Hans Payr in Feldkirchen/Poitschach (Karnten), AUSTRIA
Specification __.__________ The invention relates to an apparatus for dividing wood, particularly for finishing precut wood, with a device for holding the wood and with a saw dis-placeable in parallel to the longitudinal extension of the wood for executing the dividing work, wherein the device for holding the wood is adjustable transversely to the direction of movement of the saw in order to set the cutting position and exhibits clamping trestles with respectively two clamping jaws engaging the wood from above and from below.
Such apparatuses are utilized predominantly for the finishing of precut wood (cants). The saws used for the finishing step can be circular saws or band saws and are fixedly mounted in conventional facilities. In known facilities, it is the device for holding the wood to be divided which is adjustable transversely to the longitudinal extension of the wood, i.e. crosswise to the direction of the cut, for align-ing the wood with respect to the saw (setting of the cutting position), and is additionally movable in the direction of the wood for executing the sawing work.
- 2 ~
This dual mobility of the holding device not only presents structural disadvantages since the device for holding the wood must be movable in two directions, but also displays the drawback that the operator of the apparatus does not see the wooden blank at rest in front of him and therefore finds it hard to observe how the blank can be divided with a minimum of waste.
It has been known from EP-A 55,793 to retain wooden boards, during the edging of the same, in align-ment in an apparatus, and to move the tool (saw ormilling cutter) intended for the edging step with the board being at a standstill. For fixing the board in the apparatus, several pressure pistons are provided which can be advanced from above toward a table.
U.S. Patent 4,348,924 discloses an apparatus for edging the rims of multiple-layer, panel-shaped workpieces; in these workpieces, the two outer layers project past the rim of the central layer. In order to retain the workpiece, a clamping means is provided which is equipped with two clamping jaws, the clamping jaws engaging respectively from above and from below at the workpiece and holding the latter. The clamping means for the workpiece can be adjusted with respect to the cutting plane of the saw with the aid of a motor in a manner not shown in detail. The saw is moved relatively to the stationary workpiece for the edging operation.
_ 3 ~ .`3 The invention is based on the object of providing an apparatus of the type discussed hereinabove which does not exhibit the aforedescribed disadvantages and which, in particular, is simple in its operation.
According to the invention, this object has been attained by providing that the saw, guided on a stationary guide means, is a saw that is effective toward two sides; that the device for holding the wood exhibits slideways for the clamping trestles and sup-ports for the wood; and that the lower clamping jaws supported at the clamping trestles can be lowered through cutouts to below the supportsO
The invention results in the advantage, on the one hand, that idle strokes are avoided because with each stroke, i.e. during the forward and backward reciprocation of the saw, a cutting operation (dividing work) and, respectively, a finishing operation can be performed.
The apparatus according to this invention for dividing wood is also advantageous insofar as it occupies little space. It is furthermore possible to ~eed wood laterally to the device ~or holding the wood so that an operator also enjoys a satisfactory overview of the working surface, i.e. the operating range.
- 4 ~ S~'9~.~3 In the apparatus according to this invention, the wood is at a standstill during execution of the cutting work, and the saw moves relatively to the blank to be divided. This not only simplifies the structure of the apparatus, but the required space for the ap-paratus in total is likewise reduced.
Advantageous further embodiments of the in-vention are set forth in the dependent claims.
Additional details and features of the inven-tion can be seen from the following description ofpreferred embodiments, reference being had to the appended drawings wherein:
Figure 1 shows an apparatus for finishing precut wood, in a lateral view, Figure 2 is a top view of the apparatus of Figure 1, Figure 3 shows schematically a saw utilized in the apparatus of this invention, Figure 4 shows another embodiment of the clamping trestles, and Figure 5 shows a different embodiment of a saw.
5 ~ .3 The apparatus serves for dividing wood, particularly for finishing precut wood. In case the apparatus according to the invention is utilized as a finishing saw, it is possible to manufacture window frames, thin sheets, slats, and so forth from pre-canted wood. It is likewise possible to produce un-planed boards (blanks intended for planing~ by means of the apparatus of this invention. However, the apparatus can also be utilized as a saw for the edging of blocks.
The apparatus comprises a device for holding the wood to be divided, with several clamping trestles 1 -- three in the illustrated embodiment --each of which exhibits two clamping jaws 2. In the embodiment illustrated in Figures 1 and 2, the clamp-ing jaws 2 can be displaced toward each other and away from each other by means of a drive mechanism, not shown in detail, for clamping the wood to be divided in place, this drive mechanism being accommodated in the clamping trestles 1.
The clamping trestles 1 are adjustable in the plane of the drawing of Figure 1 and, respectively, in parallel thereto, along slide rails arranged at sup ports 3 for the wood to be machined.
In the embodiment of the apparatus according to this invention illustrated in Figures 1 and 2, a circular saw 6 with four saw blades, the arrangement of which is shown in Figure 3, is located in opposition to the clamping trestles 1. The circular saw 6 is - 6 ~
movable in parallel to the cutting plane 11, i.e.
perpendicularly to the drawing plane of Figure 1, and is for this purpose mounted on a carriage 18 which runs on guide rails 10. The movement of the carriage 18 can be controlled by limit switchesO
The saw blades of the circular saw 6 are designed for forward cut and rearward cut so that a cut can be executed with each stroke of the circular saw 6.
A conveyor belt 1~ for left-hand drive and right-hand drive is arranged underneath the circular saw 6; by way of this belt, the wooden pieces obtained after the dividing work, such as slats, unplaned boards, squares, and the like, can be carried away. On account of the possibility of moving the conveyor belt 15 selectively in one or the other direction, presorting of the blanks produced in the apparatus of this inven-tion can be executed.
A flap 17 is furthermore provided above the conveyor belt 15; this flap can be swung about a horizontal axis extending ln parallel to the cutting plane 11. In the pitoval position illustrated in Figure 1, the severed wooden pieces do not drop onto the conveyor belt 15 but rather are deflected later-ally. Thus it is possible, ~or example, to separateoffcuts from the main product. If this is unnecessary, ~s~
then the flap 17 is flipped upwards into a vertical position. For this purpose, a drive mechanism, for example a pressure medium motor or the like, is provid-ed which is not illustrated in detail. In case of an upwardly flipped flap 17, the wooden sections will drop onto the conveyor belt 15.
A conveyor belt, e.g. the conveyor belt 15, can likewise be included for carrying away any sawdust.
Several feeding conveyor belts 13 are arranged for feeding the wooden blanks 16 to be divided in the apparatus of this invention; these conveyor belts extend beyond the clamping trestles 1. The wooden blanks 16 can be fed to these conveyor belts by way of a longi-tudinal conveyor designed, for example, as a roller track 14.
As can be seen especially from Figure 2, a lif-ting table 12 is provided beside each support 3 with slide rails for the clamping trestles l; this lifting table can be raised from a rest position wherein it is lowered beneath the supports 3 up to the end of the feediny conveyors 13 on the delivery side. Each lift-ing table 12 is furthermore equipped with a conveyor chain by means of which the wooden blan]cs 16 taken over by the Eeeding conveyor 13 can be transported. With the lifting table 12 being extended, the clamping jaws 2 are automatically retracted.
- 8 - ~ .6 After the wooden blanks 16 have been lowered by lowerin~ the lifting tables 12 onto the supports 3~
the clamping trestles 1 with the clamping jaws 2 being opened are advanced, and the wooden section 16 is clamped fixedly in place by operating the clamping jaws 2.
The alignment of the thus-retained wooden piece 16 with respect to the cutting plane 11 of the circular saw 6 is likewise accomplished by moving the clamping trestles l; for this purpose, a sighting means can be included, consisting of a camera 5 and a monitor 9 which latter is arranged at the operating station of an operator. The sighting device can be a unit with dis-play of the cutting line on the screen 9, as known from the periodical "HOLZ KURIER" [Wood Courier], 45th year, 15 No. 24, pp. 12-14 (June 14, 1990). This cutting line indicating device, called "Optiline", is distinguished in that a line corresponding to the cutting plane 11 is produced on the screen 9 in the image taken by the camera 5 so that the wooden blank 16 can be accurately aligned by the operator ~ by moving the clamping trestles 1 and/or the clamping jaws 2 with respect to the cutting line 11 and consequently an optimum utilization o~ the wood is made possible.
In the device according to this invention, means 4 for turning wooden blanks are provided beside each support 3 with the slide rails for the clamping trestles 1; these means comprise a movable arm. In case a wooden section 16 is to be turned, it is released by the clamping jaws 2 of the clamping trestles 1, and the turning means 4 (prismatic turner) is operated.
Thereupon the clamping jaws 2 are again operated, and the turned wooden section is retained.
It is possible with the aid of the afore-described apparatus according to this invention to cut, for example, a main product from precanted round timber. In this connection, the quality can be perfect-ly evaluated, and the entering cut can be changed in minimum time.
The apparatus of this invention can also be utilized advantageously for the production of window frames (wood low in knots) since optimum evaluation of quality is made possible on account of the stationary workpiece (no lateral movements as in case of the known devices).
The positioning of the clamping trestles 1 for setting the cutting thickness can be effected mechanically but is preferably executed with electronic control. For example, the procedure of separating the wooden section (preferably the cants) takes place in a fully automatic fashion wherein, by following a - 10 - ~ 3 program, the wood is positioned, then cut, then re-positioned, then cut a~ain, and so forth wherein, during the stroke of the circular saw 6 in each direction o~ the double arrow 7 of Figure 2, a cut is performed.
Thanks to the prismatic turners 4, the wood 16 to be worked upon can be rapidly turned. In this way, it is possible to saw off a still usable wood (main product) even from already extensively trimmed wooden pieces which have been reduced to relative thinness.
The procedure here can be such that, after cutting off the initial slab on one side of the cant, the latter is turned and is retained by the clamping jaws 2 facing the clamping trestles 1 with the just-cut side. Any waste is in this way kept to a very small quantity~
It is understood that it is also possible to employ single-shaft circular saw blades in place of the twin-shaft circular saw blades employed in the il-lustrated embodiment. In general, any desired saws can be utilized in the apparatus according to this invention.
Eigure 4 shows an embodiment of a clamping trestle 1 wherein the clamping jaws 2 are displaceably guided in the clamping trestle 1 and are driven by a threaded spindle 20 in opposite directions.
The clamping trestle l can be moved in the direction of the double arrow 21 transversely to the direction of motion of the saw 6 and is displaceably supported on a pair of guide rods 22.
The clamping trestle l is driven by way of a threaded spindle 23 cooperating with a nut 24 at-tached to the clamping trestle l. The guide rods 22 are attached by way of mounting plates 25 to carriers 26 on both sides.
The threaded spindle 23 is extended through a mounting plate 25 and a carrier 26 and coupled to a motor 27 (stepping motor) driving the threaded spindle 23.
The clamping trestles l can be adjusted by means of a hydraulic motor or an electrical geared motor in the embodiment shown in Figures l and 2, as well as in the example shown in Figure 4. For this purpose, a joint shaft driven by the motor can be provided which (jointly) adjusts, by way of endless chains, the clamping trestles transversely to the cutting plane ll.
The movements of the clamping trestles 1 and/or their clamping jaws can also be executed with the aid of pneumatic or hydraulic cylinders.
The provision can be made according to the inven~ion that the clamping trestle 1 in i.ts entirety is guided between supports 3 for the wood, or, in accordance with a further embodiment, the provision can be made that the clamping trestles 1 can be advanced only up to the supports 3 wherein merely the lower clamping jaw 2 can be lowered, in the advanced posi-tion of the clamping trestle 1, into a recess in the supports 3 for the wood. The supports 3 are indicated merely schematically in Figure 4.
Figure 5 shows a twin-shaft design of a saw 6. Of the two saws 29 and 30 of the saw 6, one saw 29 is mounted via two bearing blocks 31 at the circular saw carriage 18. The second saw 30 is at-tached to the underside of a rocker 33 by way of two bearing blocks 32. The rocker 33 can be adjusted vertically by way of an adjusting unit, for example a pressure ~edium cylinder 34 engaging in the zone of the free end of the rocker 33.
At its end remote rom the bearing blocks 32 for the saw 30, the rocker 33 is attached to the car-riage 18 via a joint. Furthermore, a drive motor 35 or the saw 30 is arranged at the rocker 33, this motor being pivoted along with the rocker 33. The 25 saw 30 is driven by the motor 35 by way of a belt 36.
The belt 36 can, of course, also be replaced by equivalent means, such as, for example, chains or the ~ 3 like. Alternatively, the motor can drive the circular saw shaft directly ox via a gear system.
For driving the saw 29, a motor 37 is pro-vided which likewise drives the saw 29 by way of a belt 38 or the like. The motor 37 is fixedly mounted to the carriage 18.
On account of the pivotability of the saw 30 via the rocker 33, it is possible in a simple way to change the mutual distance of the two saws 29, 30 and thus to adapt the saw 6 to the respective requirements.
The carriage 18 is guided, in the embodiment shown in Figure 5, on guide rods 39 and 40 which latter are attached to a frame 41. A motor 42 is provided for driving the carriage 18, this motor driving a rope pulley 43 connected to the circular saw carriage. The pulley is guided at the frame 41 via two guide rollers 44, 45.
Furthermore, a conveyor belt lS is provided beside the frame 41 as well; this conveyor belt is extended over guide rollers 46 and 47 arranged co-axially to the guide rollers 44, 45 for the rope pul-ley 43 and is driven by a motor 48. The wood sections, such as slats, unplaned boards, and the like, obtained after the dividing work,can be transported away by means of the conveyor belt 15.
Feeding of wood to be worked on can also be effected from the left or ~rom the right via conveyor rolls that can be lifted and lowered and a.re arranged between the supports 3.
It is also possible to design the inclined conveyors 13 to be pivotable and to make them of such a length that they extend between the clamping trestles 1 up to the supports 3. In this version, the lifting tables 12 can be omitted since the opera-tion can be carried out so that the inclined conveyors 13 are lowered together with a piece of wood 16 lying at their free end zones, and thus the piece of wood 16 is thereby deposited on the supports~
In order to adjust the clamping trestles 1, it is also possible to provide rack-and-pinion drive mechanisms. These drive mechanisms can be joined or they can be independent of each other.
The support 3 for the wood 16 to be worked on can be very broad (up to 1000 mm) in the apparatus of this invention so that also misshapen wood 16, i.e.
wood having very irregularly extending side edges, can be worked in an economical and optimum fashion (small amount of waste).
This dual mobility of the holding device not only presents structural disadvantages since the device for holding the wood must be movable in two directions, but also displays the drawback that the operator of the apparatus does not see the wooden blank at rest in front of him and therefore finds it hard to observe how the blank can be divided with a minimum of waste.
It has been known from EP-A 55,793 to retain wooden boards, during the edging of the same, in align-ment in an apparatus, and to move the tool (saw ormilling cutter) intended for the edging step with the board being at a standstill. For fixing the board in the apparatus, several pressure pistons are provided which can be advanced from above toward a table.
U.S. Patent 4,348,924 discloses an apparatus for edging the rims of multiple-layer, panel-shaped workpieces; in these workpieces, the two outer layers project past the rim of the central layer. In order to retain the workpiece, a clamping means is provided which is equipped with two clamping jaws, the clamping jaws engaging respectively from above and from below at the workpiece and holding the latter. The clamping means for the workpiece can be adjusted with respect to the cutting plane of the saw with the aid of a motor in a manner not shown in detail. The saw is moved relatively to the stationary workpiece for the edging operation.
_ 3 ~ .`3 The invention is based on the object of providing an apparatus of the type discussed hereinabove which does not exhibit the aforedescribed disadvantages and which, in particular, is simple in its operation.
According to the invention, this object has been attained by providing that the saw, guided on a stationary guide means, is a saw that is effective toward two sides; that the device for holding the wood exhibits slideways for the clamping trestles and sup-ports for the wood; and that the lower clamping jaws supported at the clamping trestles can be lowered through cutouts to below the supportsO
The invention results in the advantage, on the one hand, that idle strokes are avoided because with each stroke, i.e. during the forward and backward reciprocation of the saw, a cutting operation (dividing work) and, respectively, a finishing operation can be performed.
The apparatus according to this invention for dividing wood is also advantageous insofar as it occupies little space. It is furthermore possible to ~eed wood laterally to the device ~or holding the wood so that an operator also enjoys a satisfactory overview of the working surface, i.e. the operating range.
- 4 ~ S~'9~.~3 In the apparatus according to this invention, the wood is at a standstill during execution of the cutting work, and the saw moves relatively to the blank to be divided. This not only simplifies the structure of the apparatus, but the required space for the ap-paratus in total is likewise reduced.
Advantageous further embodiments of the in-vention are set forth in the dependent claims.
Additional details and features of the inven-tion can be seen from the following description ofpreferred embodiments, reference being had to the appended drawings wherein:
Figure 1 shows an apparatus for finishing precut wood, in a lateral view, Figure 2 is a top view of the apparatus of Figure 1, Figure 3 shows schematically a saw utilized in the apparatus of this invention, Figure 4 shows another embodiment of the clamping trestles, and Figure 5 shows a different embodiment of a saw.
5 ~ .3 The apparatus serves for dividing wood, particularly for finishing precut wood. In case the apparatus according to the invention is utilized as a finishing saw, it is possible to manufacture window frames, thin sheets, slats, and so forth from pre-canted wood. It is likewise possible to produce un-planed boards (blanks intended for planing~ by means of the apparatus of this invention. However, the apparatus can also be utilized as a saw for the edging of blocks.
The apparatus comprises a device for holding the wood to be divided, with several clamping trestles 1 -- three in the illustrated embodiment --each of which exhibits two clamping jaws 2. In the embodiment illustrated in Figures 1 and 2, the clamp-ing jaws 2 can be displaced toward each other and away from each other by means of a drive mechanism, not shown in detail, for clamping the wood to be divided in place, this drive mechanism being accommodated in the clamping trestles 1.
The clamping trestles 1 are adjustable in the plane of the drawing of Figure 1 and, respectively, in parallel thereto, along slide rails arranged at sup ports 3 for the wood to be machined.
In the embodiment of the apparatus according to this invention illustrated in Figures 1 and 2, a circular saw 6 with four saw blades, the arrangement of which is shown in Figure 3, is located in opposition to the clamping trestles 1. The circular saw 6 is - 6 ~
movable in parallel to the cutting plane 11, i.e.
perpendicularly to the drawing plane of Figure 1, and is for this purpose mounted on a carriage 18 which runs on guide rails 10. The movement of the carriage 18 can be controlled by limit switchesO
The saw blades of the circular saw 6 are designed for forward cut and rearward cut so that a cut can be executed with each stroke of the circular saw 6.
A conveyor belt 1~ for left-hand drive and right-hand drive is arranged underneath the circular saw 6; by way of this belt, the wooden pieces obtained after the dividing work, such as slats, unplaned boards, squares, and the like, can be carried away. On account of the possibility of moving the conveyor belt 15 selectively in one or the other direction, presorting of the blanks produced in the apparatus of this inven-tion can be executed.
A flap 17 is furthermore provided above the conveyor belt 15; this flap can be swung about a horizontal axis extending ln parallel to the cutting plane 11. In the pitoval position illustrated in Figure 1, the severed wooden pieces do not drop onto the conveyor belt 15 but rather are deflected later-ally. Thus it is possible, ~or example, to separateoffcuts from the main product. If this is unnecessary, ~s~
then the flap 17 is flipped upwards into a vertical position. For this purpose, a drive mechanism, for example a pressure medium motor or the like, is provid-ed which is not illustrated in detail. In case of an upwardly flipped flap 17, the wooden sections will drop onto the conveyor belt 15.
A conveyor belt, e.g. the conveyor belt 15, can likewise be included for carrying away any sawdust.
Several feeding conveyor belts 13 are arranged for feeding the wooden blanks 16 to be divided in the apparatus of this invention; these conveyor belts extend beyond the clamping trestles 1. The wooden blanks 16 can be fed to these conveyor belts by way of a longi-tudinal conveyor designed, for example, as a roller track 14.
As can be seen especially from Figure 2, a lif-ting table 12 is provided beside each support 3 with slide rails for the clamping trestles l; this lifting table can be raised from a rest position wherein it is lowered beneath the supports 3 up to the end of the feediny conveyors 13 on the delivery side. Each lift-ing table 12 is furthermore equipped with a conveyor chain by means of which the wooden blan]cs 16 taken over by the Eeeding conveyor 13 can be transported. With the lifting table 12 being extended, the clamping jaws 2 are automatically retracted.
- 8 - ~ .6 After the wooden blanks 16 have been lowered by lowerin~ the lifting tables 12 onto the supports 3~
the clamping trestles 1 with the clamping jaws 2 being opened are advanced, and the wooden section 16 is clamped fixedly in place by operating the clamping jaws 2.
The alignment of the thus-retained wooden piece 16 with respect to the cutting plane 11 of the circular saw 6 is likewise accomplished by moving the clamping trestles l; for this purpose, a sighting means can be included, consisting of a camera 5 and a monitor 9 which latter is arranged at the operating station of an operator. The sighting device can be a unit with dis-play of the cutting line on the screen 9, as known from the periodical "HOLZ KURIER" [Wood Courier], 45th year, 15 No. 24, pp. 12-14 (June 14, 1990). This cutting line indicating device, called "Optiline", is distinguished in that a line corresponding to the cutting plane 11 is produced on the screen 9 in the image taken by the camera 5 so that the wooden blank 16 can be accurately aligned by the operator ~ by moving the clamping trestles 1 and/or the clamping jaws 2 with respect to the cutting line 11 and consequently an optimum utilization o~ the wood is made possible.
In the device according to this invention, means 4 for turning wooden blanks are provided beside each support 3 with the slide rails for the clamping trestles 1; these means comprise a movable arm. In case a wooden section 16 is to be turned, it is released by the clamping jaws 2 of the clamping trestles 1, and the turning means 4 (prismatic turner) is operated.
Thereupon the clamping jaws 2 are again operated, and the turned wooden section is retained.
It is possible with the aid of the afore-described apparatus according to this invention to cut, for example, a main product from precanted round timber. In this connection, the quality can be perfect-ly evaluated, and the entering cut can be changed in minimum time.
The apparatus of this invention can also be utilized advantageously for the production of window frames (wood low in knots) since optimum evaluation of quality is made possible on account of the stationary workpiece (no lateral movements as in case of the known devices).
The positioning of the clamping trestles 1 for setting the cutting thickness can be effected mechanically but is preferably executed with electronic control. For example, the procedure of separating the wooden section (preferably the cants) takes place in a fully automatic fashion wherein, by following a - 10 - ~ 3 program, the wood is positioned, then cut, then re-positioned, then cut a~ain, and so forth wherein, during the stroke of the circular saw 6 in each direction o~ the double arrow 7 of Figure 2, a cut is performed.
Thanks to the prismatic turners 4, the wood 16 to be worked upon can be rapidly turned. In this way, it is possible to saw off a still usable wood (main product) even from already extensively trimmed wooden pieces which have been reduced to relative thinness.
The procedure here can be such that, after cutting off the initial slab on one side of the cant, the latter is turned and is retained by the clamping jaws 2 facing the clamping trestles 1 with the just-cut side. Any waste is in this way kept to a very small quantity~
It is understood that it is also possible to employ single-shaft circular saw blades in place of the twin-shaft circular saw blades employed in the il-lustrated embodiment. In general, any desired saws can be utilized in the apparatus according to this invention.
Eigure 4 shows an embodiment of a clamping trestle 1 wherein the clamping jaws 2 are displaceably guided in the clamping trestle 1 and are driven by a threaded spindle 20 in opposite directions.
The clamping trestle l can be moved in the direction of the double arrow 21 transversely to the direction of motion of the saw 6 and is displaceably supported on a pair of guide rods 22.
The clamping trestle l is driven by way of a threaded spindle 23 cooperating with a nut 24 at-tached to the clamping trestle l. The guide rods 22 are attached by way of mounting plates 25 to carriers 26 on both sides.
The threaded spindle 23 is extended through a mounting plate 25 and a carrier 26 and coupled to a motor 27 (stepping motor) driving the threaded spindle 23.
The clamping trestles l can be adjusted by means of a hydraulic motor or an electrical geared motor in the embodiment shown in Figures l and 2, as well as in the example shown in Figure 4. For this purpose, a joint shaft driven by the motor can be provided which (jointly) adjusts, by way of endless chains, the clamping trestles transversely to the cutting plane ll.
The movements of the clamping trestles 1 and/or their clamping jaws can also be executed with the aid of pneumatic or hydraulic cylinders.
The provision can be made according to the inven~ion that the clamping trestle 1 in i.ts entirety is guided between supports 3 for the wood, or, in accordance with a further embodiment, the provision can be made that the clamping trestles 1 can be advanced only up to the supports 3 wherein merely the lower clamping jaw 2 can be lowered, in the advanced posi-tion of the clamping trestle 1, into a recess in the supports 3 for the wood. The supports 3 are indicated merely schematically in Figure 4.
Figure 5 shows a twin-shaft design of a saw 6. Of the two saws 29 and 30 of the saw 6, one saw 29 is mounted via two bearing blocks 31 at the circular saw carriage 18. The second saw 30 is at-tached to the underside of a rocker 33 by way of two bearing blocks 32. The rocker 33 can be adjusted vertically by way of an adjusting unit, for example a pressure ~edium cylinder 34 engaging in the zone of the free end of the rocker 33.
At its end remote rom the bearing blocks 32 for the saw 30, the rocker 33 is attached to the car-riage 18 via a joint. Furthermore, a drive motor 35 or the saw 30 is arranged at the rocker 33, this motor being pivoted along with the rocker 33. The 25 saw 30 is driven by the motor 35 by way of a belt 36.
The belt 36 can, of course, also be replaced by equivalent means, such as, for example, chains or the ~ 3 like. Alternatively, the motor can drive the circular saw shaft directly ox via a gear system.
For driving the saw 29, a motor 37 is pro-vided which likewise drives the saw 29 by way of a belt 38 or the like. The motor 37 is fixedly mounted to the carriage 18.
On account of the pivotability of the saw 30 via the rocker 33, it is possible in a simple way to change the mutual distance of the two saws 29, 30 and thus to adapt the saw 6 to the respective requirements.
The carriage 18 is guided, in the embodiment shown in Figure 5, on guide rods 39 and 40 which latter are attached to a frame 41. A motor 42 is provided for driving the carriage 18, this motor driving a rope pulley 43 connected to the circular saw carriage. The pulley is guided at the frame 41 via two guide rollers 44, 45.
Furthermore, a conveyor belt lS is provided beside the frame 41 as well; this conveyor belt is extended over guide rollers 46 and 47 arranged co-axially to the guide rollers 44, 45 for the rope pul-ley 43 and is driven by a motor 48. The wood sections, such as slats, unplaned boards, and the like, obtained after the dividing work,can be transported away by means of the conveyor belt 15.
Feeding of wood to be worked on can also be effected from the left or ~rom the right via conveyor rolls that can be lifted and lowered and a.re arranged between the supports 3.
It is also possible to design the inclined conveyors 13 to be pivotable and to make them of such a length that they extend between the clamping trestles 1 up to the supports 3. In this version, the lifting tables 12 can be omitted since the opera-tion can be carried out so that the inclined conveyors 13 are lowered together with a piece of wood 16 lying at their free end zones, and thus the piece of wood 16 is thereby deposited on the supports~
In order to adjust the clamping trestles 1, it is also possible to provide rack-and-pinion drive mechanisms. These drive mechanisms can be joined or they can be independent of each other.
The support 3 for the wood 16 to be worked on can be very broad (up to 1000 mm) in the apparatus of this invention so that also misshapen wood 16, i.e.
wood having very irregularly extending side edges, can be worked in an economical and optimum fashion (small amount of waste).
Claims (17)
1. Apparatus for dividing wood, particularly for finishing precut wood (16), with a device for hold-ing the wood (16) and with a saw (6) displaceable in parallel to the longitudinal extension of the wood (16) (arrow 7) for executing the dividing work, wherein the device for holding the wood (16) is adjustable trans-versely to the direction of movement (arrow 7) of the saw (6) in order to set the cutting position, and exhibits clamping trestles (1) with respectively two clamping jaws (2) engaging the wood (16) from abvoe and from below, characterized in that the saw (6), guided on a station-ary guide means (10, 41), is a saw (6) effective toward two sides; that the device for holding the wood (16) exhibits slideways (22) for the clamping trestles (1) and supports (3) for the wood (16); and that the lower clamping jaws (2) supported at the clamping trestles (1) can be lowered through cutouts to below the supports (3).
2. Apparatus according to claim 1, characterized in that a working station for an operator and a screen (9) for adjusting the cutting plane (11) are provided beside the path of motion for the saw (6) on the side lying in opposition to the device for holding the wood.
3. Apparatus according to claim 1, charcterized in that the slideways (22) for the clamping trestles (1) are constituted by guide rods.
4. Apparatus according to one of claims 1-3, characterized in that the drive means for shifting the clamping trestles (1) is constituted by a threaded spindle (23) driven by a motor (27).
5. Apparatus according to one of claims 1-4, characterized in that the clamping jaws (2) are pivotably supported at the clamping jaws (1).
6. Apparatus according to one of claims 1-4, characterized in that the clamping jaws (2) are guided displaceably at the clamping trestles (1), driven via a threaded spindle (20).
7. Apparatus according to one of claims 1-6, characterized in that a bilaterally serrated band saw is provided as the saw.
8. Apparatus according to one of claims 1-7, characterized in that a circular saw for forward and rearward cut is provided as the saw (6).
9. Apparatus according to claim 8, characterized in that the circular saw (6) is designed as a single-shaft up to a four-shaft unit.
10. Apparatus according to claim 9, characterized in that, with the arrangement of a four-shaft circular saw (6), the four saw blades of the circular saw (6) are located in one plane, and that one pair of saws exhibits a larger mutual distance than the second pair of saws wherein the saw blades of the pair of saws in closer proximity to each other engage in between the saw blades of the widely spaced pair of circular saws (Figure 3).
11. Apparatus according to claim 9, characterized in that the circular saw (6) is of a twin-shaft design, and that one saw (30) is mounted on an adjustably supported rocker (33) and the second saw (29) is mounted fixedly to the circular saw carriage (18) of the saw (6).
12. Apparatus according to claim 11, characterized in that the saws (29, 30) are driven by motors (35, 37) via belt drive mechanism (36, 38) or the like.
13. Apparatus according to one of claims 1-12, characterized in that, for the feeding of wood (16) to be divided, particularly to be finished (cants), a device (13) is provided which moves the wood (16) transversely to the direction of motion of the saw (6).
14. Apparatus according to claim 13, characterized in that the device (13) for feeding wood comprises a longitudinal conveyor (14) designed, for example, as a roller track, and at least two transverse conveyors (13) extending from the longi-tudinal conveyor (14) obliquely over the clamping trestles (1), and that lifting tables (12) that can be raised are arranged beside each support (3), these tables being raisable from a ready position wherein they are lowered beneath the supports (3) into a transfer position, the lifting tables (12), in the transfer position, being arranged beside the ends of the transverse conveyors (13) on the delivery side.
15. Apparatus according to one of claims 1-14, characterized in that a conveyor belt (15) is provided underneath the saw (6) for carrying away the pieces cut off from the wood, such as slats, unplaned boards, staves, and the like.
16. Apparatus according to one of claims 1-15, characterized in that a flap (17) is provided which can be swung inwards and outwards, for example with the aid of a pressure medium motor, over the conveyor belt (15) about an axis oriented in parallel to the conveying direction of the conveyor belt (15) for the delivery.
17. Apparatus according to one of claims 14-16, characterized in that a conveying member for moving the piece of wood (16) transversely to the longitudinal extension of the latter is provided in lifting tables (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2051916 CA2051916A1 (en) | 1991-09-20 | 1991-09-20 | Apparatus for dividing wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2051916 CA2051916A1 (en) | 1991-09-20 | 1991-09-20 | Apparatus for dividing wood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2051916A1 true CA2051916A1 (en) | 1993-03-21 |
Family
ID=4148407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2051916 Abandoned CA2051916A1 (en) | 1991-09-20 | 1991-09-20 | Apparatus for dividing wood |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2051916A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162587A (en) * | 2021-11-12 | 2022-03-11 | 深圳市诚捷智能装备股份有限公司 | Conveying device |
-
1991
- 1991-09-20 CA CA 2051916 patent/CA2051916A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162587A (en) * | 2021-11-12 | 2022-03-11 | 深圳市诚捷智能装备股份有限公司 | Conveying device |
| CN114162587B (en) * | 2021-11-12 | 2024-04-23 | 深圳市诚捷智能装备股份有限公司 | Conveying device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5179883A (en) | Apparatus for dividing wood | |
| US4676130A (en) | Lumber edger | |
| US6142050A (en) | Cutting machine for elongate workpieces | |
| WO2018014464A1 (en) | High-speed cut-off saw of numerical control | |
| US20010045150A1 (en) | Feedworks device | |
| US6880695B2 (en) | Board processing unit | |
| CN210046774U (en) | High-speed cut-off finish planing production line | |
| CN110722640A (en) | Double-end horizontal saw device | |
| US20090199929A1 (en) | Working Device | |
| CN115415813B (en) | Production system for machining aluminum templates | |
| CN112976166A (en) | Intelligent wood transverse sawing system | |
| US6082421A (en) | Finger jointer | |
| CN109203085B (en) | High-speed optimized cutting and finish planing production line | |
| US3662798A (en) | Method of cutting panels | |
| CN111267180B (en) | Full-automatic energy-saving woodworking sawing machine for log processing | |
| CN218053049U (en) | Plank processing machinery with automatic adjustment function | |
| CA2051916A1 (en) | Apparatus for dividing wood | |
| CN215618362U (en) | Automatic pay-off blank device | |
| US4394894A (en) | Machine for machining panels, planks and sections or similar, in particular for wood and the derivatives thereof | |
| CN215392856U (en) | Full-automatic bidirectional angle-adjustable saw cutting equipment | |
| CN215316069U (en) | Variable angle sawing line | |
| CN109483648A (en) | Precision pulling bench saw | |
| CN210999128U (en) | Double-end horizontal saw device | |
| JPH02187301A (en) | Wood working machine, especially chamferring machine | |
| JP2023513169A (en) | Sawmill equipment and method for sawmilling materials |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |