• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an edge sawing machine for simultaneous parallel sawing opposite longitudinal edges and thus width adjustment of a piece of wood (5), comprising a feed table (3) whose upper side defines a feed plane (4) out with which the piece of wood is fed lengthwise during sawing, and a first and second saw blade which are rotatable in the same direction of rotation (12) but of which the first saw blade (6) is rotatably mounted on a rotation shaft (8) located below the feed plane while the second saw blade (9) is rotatably mounted on a rotation shaft (11) located above the feed plane . As a result, during sawing, one of the saw blades attacks the piece of wood with force (17) acting against a feed direction (13) of the wood while one of the saw blades attacks the piece of wood with a force (18) acting in the feed direction. At least one of the saw blades' position is adjustable in the longitudinal direction of the axis of rotation to enable adjustment of the sawing distance between the two saw blades. A stop (16) is arranged in line with and in the area immediately behind the saw blade which acts on the piece of wood (5) with a force (17) directed towards the feed direction (13), wherein at least one operative part (a) of the stop has a thickness which does not exceed the thickness of the saw blade. Publication image: Fig. 2
    公开号:SE536027C2
    申请号:SE1151134
    申请日:2011-11-29
    公开日:2013-04-09
    发明作者:Mattias Bystroem
    申请人:Mattias Bystroem；
    IPC主号:
    专利说明:

    25 30 536 027 2 paragraph. In order to achieve above all a linear sawing with high precision, it is therefore necessary to provide such edge sawing machines with powerful feeding devices. both in front of and behind the saw means, which control the piece of wood with great force during feeding to prevent lateral displacements.
    Such powerful feeding devices are expensive to manufacture and can, especially with small-scale edge sawing machines, mean that the costs of the feeding devices will constitute an unreasonably large part of the total cost of the machine.
    In edge sawing machines provided with two or more circular saw blades, each of these is usually rotatably mounted on a rotary shaft located below a feed plane, which is driven by a top of a feed table, and driven in such a direction of rotation that they attacks the piece of wood with a force that acts against the feed direction. In this case, there is a great risk of the piece of wood returning to the feed direction and either special return guards must be provided, which entails extra costs, or the feed devices must also be dimensioned to prevent such returns, which contributes to further increase in cost.
    From SU1530445 an edge sawing machine is previously known which is provided with two circular saw blades. These rotate in the same direction but are arranged so that one saw blade is rotatably mounted on a rotation shaft located below a feed table feed plane, while the other saw blade is rotatably mounted on a rotation shaft located above the feed plane. The direction of rotation of the saw blades is such that the lower saw blade engages the piece of wood with a force directed towards the feed direction while the upper saw blade engages the piece of wood with a force directed in the feed direction and thus contributes to the feed of the wood. By arranging the saw blades in this way, the risk of return of the wood is considerably reduced by the saw blades affecting the wood with opposite forces which substantially take each other out and possibly the return protection or the feeding devices therefore do not need to be dimensioned to absorb large return forces. However, the feeding devices must still be so strongly dimensioned that lateral displacements of the wood are prevented during sawing. 10 15 20 25 30 536 02 Brief description of the invention The invention aims to provide an edge sawing machine which has a simple and cost-saving construction in that the one or more feeding devices can be dimensioned for relatively small forces. At least this object is achieved with an edge saw machine according to claim 1. At least the above object can be achieved with a circular sawed edge machine in which the circular saw blades are arranged in such a way that a first saw blade is rotatably arranged on a rotation axis located below a feed plane and a the second saw blade is rotatably arranged on a axis of rotation which is located above the feed plane and the saw blades have the same direction of rotation. Thereby, one of the saw blades, the counter-sawing saw blade, will attack the piece of wood with a force directed towards the feed direction of the wood while the other, the sawing saw blade, will attack the piece of wood with a force directed in the feed direction. The invention is based on the realization that the piece of wood sawn into the machine will, due to the combination of a counter-sawing and a sawing-saw blade, be affected by a rotating torque which seeks to move the sawn part of the wood towards the side of the machine where the sawing the saw blade is located. In accordance with the invention, this condition is used to easily obtain a very stable, rectilinear feed and thus linear sawing of the piece of wood with high precision by a stop, which in at least an effective part has a thickness not exceeding that of the saw blade. thickness, is arranged in line with and immediately behind at least the opposing saw blade. In the following description, the saw blade rotatably mounted on a rotation shaft located below the feed plane for for the sake of simplicity generally to be called the first and / or lower saw blade. Correspondingly, the saw blade which is rotatably arranged on a axis of rotation which is located above the feed plane will generally be called the second and / or upper saw blade.
    In the technique of sawing with the aid of circular saw blades, it is known to arrange so-called splitting knives in the area immediately behind the respective saw blade, which are usually shaped as an upward and upwardly tapered fin of sheet metal which follows the curvature of the saw blade and has a thickness of about 10 20 25 30 536 02 4 corresponds to the thickness of the saw blade. However, such splitting knives have nothing to do with guiding the sawn timber but only aim to prevent the timber from squeezing around the blade from either direction during sawing or that the saw teeth of the blade can grip the timber during the upward movement of the rear part of the saw blade, both of which can result in hot running of the saw blade and / or that the wood is thrown upwards. Such splitting knives are usually not rigid enough and / or are not fixed firmly enough laterally in relation to the saw blade to be able to serve as a timber guide, which they also do not have to be to be able to fulfill their function because the splitting knife becomes self-centering in the saw groove behind the saw blade. Normally, they also do not have a sufficiently large length in the feeding direction for them to serve as a timber-stopping stop, since the length is usually not greater than 5-10 cm. A stop according to the present invention, on the other hand, has sufficient rigidity, is securely fixed in the correct position in relation to the saw blade and has a sufficient length in the feed direction to be able to enable rectilinear sawing of timber pieces with great precision. It is a given that the ability of the stop to provide a linear feed of pieces of wood through the machine increases the greater the length of the stop and as a rule the stop should have a length which is at least equal to half the diameter of the saw blade, preferably at least 30 cm and most preferably a length between 0.5 - 2 m to obtain an acceptable linear feed of the pieces of wood.
    Claim 1 states that an effective part of the stop has a thickness which does not exceed the thickness of the saw blade. The term "effective part of the stop" means a part of the stop which is located within a vertical area where pieces of wood sawn pass the stop, ie at least within an area from the feed plane defined by the top of the feed table up to an upper edge of the stop, in if the stop is attached only in its lower part has a height which is less than the thickest pieces of wood intended to be sawn in the machine, or to a height above the feed plane which corresponds to the maximum thickness of the pieces of wood which are intended to be sawn in the edge sawing machine in In most cases, however, the stop does not have to extend high above the feed plane, as it is usually sufficient if the stop is directed towards a lower part of a side edge surface of the timber pieces.
    Both below and above this active part, according to the invention, the stop 10 can have, for example, stiffening fl grooves and / or fastening devices for the stop to be able to withstand relatively large lateral forces without bending, even though it has so thin a cross-section that it does not exceed the thickness of the saw blade, in order thereby to be able to reliably guide pieces of wood without lateral displacement and to achieve a rectilinear sawing. In an exemplary embodiment described below and illustrated in the drawings, the only stop is arranged in line with and behind the lower saw blade, which has a direction of rotation such that it attacks the wood with a force directed towards the feed direction of the wood (opposing saw blade), i.e. the sawing upper part of the saw blade has a movement component which is directed towards the feed direction. This saw blade is further arranged stationary in such a way that it cannot be displaced in the direction of the axis of rotation. The second, upper saw blade has the same direction of rotation as the first saw blade and will consequently attack the wood with a force directed in the feed direction of the wood (accompanying saw blade), since it saws with its lower part which has a movement component which is directed in the feed direction. This saw blade is further adjustable in the direction of the axis of rotation by displacing the motor to allow adjustment of the distance between the saw blades and thereby make it possible to saw the wood in different widths.
    However, an edge sawing machine according to the invention can be modified and designed in many different ways within the framework of the overall invention tank. For example, a stop could also be mounted behind the accompanying saw blade which attacks the wood with a force in the feed direction, but such a stop would probably have no practical function, at least not be allowed to help ensure a linear sawing as it is arrest. If a stop is arranged behind a saw blade which is adjustable in the longitudinal direction of the axis of rotation, whether it is arranged behind a saw blade which affects the wood with a force directed towards or in the feed direction, it must be adjustable together with the saw blade. this and therefore entails expensive construction solutions.
    Furthermore, could the direction of rotation of the saw blades be such that the first, lower saw blade attacks the wood with a force acting in the feed 10 15 20 25 30 535 02 6 direction while the second, upper saw blade attacks the wood with a force acting against the feed direction and consequently a stop would be arranged at least in line with and behind the upper saw blade. However, such an embodiment is not preferred because in this case both saw blades will also act on the piece of wood with a force component acting in the upward direction from the feed table, in that the sawing part of the respective saw blade also has an upward movement component, so that the wood tends to be lifted from the feeding table. The feeding devices must therefore in such cases be dimensioned in order to be able to prevent such lifting of the wood. With the direction of rotation of the saw blades according to the exemplary embodiment described below and illustrated in the drawings, the force from the saw blades acts downwards, since the sawing part of each saw blade also has a downward movement component, so that the piece of wood will be pressed against the feed table. . In the following exemplary embodiment, it is the second, upper saw blade which is adjustable in the longitudinal direction of the axis of rotation. Alternatively, however, the first, lower saw blade could also be adjustable. However, this would have the disadvantage that a groove which is occupied in the feed table in order for the saw blade to be displaced in the longitudinal direction of the axis of rotation must be made considerably wider than if it is the upper saw blade that is adjustable. An alternative to this would be for the entire feeding table to be arranged slidably together with the saw blade, but such a design is probably much more complicated and costly to achieve.
    In an embodiment according to claims 6 and 7, the feeding table is designed such that it lacks all forms of delimiting means above the feeding plane at a longitudinal edge of the feeding table, preferably at the longitudinal edge of the feeding table which is located closest to the upper saw blade. This is done in order to enable sawing of pieces of wood that have a greater width than the width of the feeding table and is particularly advantageous in small-scale edge sawing machines to limit the machine's total width and minimize material consumption and thus costs. The feeding table can be designed in many different ways. In the following embodiment, the feed table comprises a plate which in the area before 10 15 20 25 30 536 02 7 and after the saw blades are provided with rotating driven rollers whose upper peripheries are located slightly above the plate and drive the wood forward during sawing. The feed plane in this case is thus a plane connecting the upper peripheries of the rollers. However, the feeding table could also consist entirely of driven or non-driven, rotatable rollers. Feeding tables in front of chain or belt conveyors could also be considered, whereby a first conveyor would stop immediately in front of the saw blades and a second conveyor would pick up immediately behind them. In the embodiment shown and described below, it has the shape of a 90 ° angle profile, a horizontal part of the angle profile being attached to the underside of the feed table plate while a vertical part of the angle profile extends up through a slot in the saw table plate to a height of about 20-50 mm above the feeding table and has a free upper edge. However, many other embodiments of the arrest would be possible within the scope of the invention. As a rule, the stop does not have to extend particularly high above the feed plane because it is normally sufficient if the stop guides only the lower edge portion of the respective piece of wood. However, it would be possible, in addition to or instead of attaching the stop to the feeding table, in addition or only to attaching the stop to some support structure above the feeding table. Such a support structure must in that case be arranged at a distance above the feeding table which is larger than the thickest pieces of wood which are intended to be sawn in the edge sawing machine. Attaching the stop only to its upper edge and not to its lower one, for example in the feed table, would be suitable in the case where the stop is arranged in line with and behind a saw blade which is slidably adjustable in the longitudinal direction of its axis of rotation.
    Thanks to the fact that the counter-sawing and the co-sawing saw blade affect the wood with forces that substantially take each other out, an edge sawing machine according to the invention could be designed without any specially arranged return protection, which is normally an official requirement for occupational safety reasons. Thus, the manufacturing cost could be reduced.
    Brief description of the drawings An embodiment of the invention will hereinafter be described with reference to the accompanying drawings. These show schematically in: Fig. 1 a cross section through an edge sawing machine according to the invention seen in the feed direction; Fig. 2 is a longitudinal section through the edge sawing machine seen from the right in Fig. 1; Fig. 3 is a top view of the edge sawing machine according to Figs. 1 and 2; and Fig. 4 is a partially sectioned, enlarged view through the saw portion of the edge saw machine showing the feed table and the hopper in cross section seen towards the feed direction.
    Detailed description of an embodiment of the housing First reference is made to Figures 1 and 2 in which the inventive edge sawing machine is shown in a schematic cross-section seen in the feed direction and a longitudinal section seen from the right in fi g 1. horizontal feed slot 2 which is delimited downwards by a feed table 3, the upper side of which defines a feed plane 4 along which wood 5, which is to be sawn, is fed through the machine. The feed slot 2 extends through the entire machine in the longitudinal direction, i.e. in the feed direction, as shown in Fig. 2. In the transverse direction, on the other hand, the feed slot has a limited extension to the left in the feed direction according to Fig. 1, feeding plane 4. The latter entails a great advantage in that pieces of wood can be sawn which are considerably wider than the width of the feeding table.
    The box-shaped housing 1 is thus formed with an upper part 1 'and a lower part 1 "which are connected along the left edge seen in the feeding direction. In the lower part 1" a first, lower saw blade 6 is arranged which is driven by a fixedly mounted first motor 7 via a rotation shaft 8 which are thus located below the feed table 3. An upper part of the saw blade protrudes above the feed table through a slot (not shown) for sawing from below pieces of wood which are fed along the feed table. A second, upper saw blade 9 parallel to the first saw blade is arranged in the upper part of the housing 1 '.
    This saw blade is driven by a second motor 10 via a rotation shaft 11 which are thus located above the feed table and the sawing of the wood thus takes place from above with a lower part of the saw blade. The very lowest part of the saw blade extends a short distance below the feed plane of the feed table through a recess in the saw table not shown. This second motor, in contrast to the first, is slidably arranged in the direction of the axis of rotation, in a manner not shown in more detail, in order to enable adjustment of the distance between the first and second saw blades and thus sawing of the wood in different widths. The recess in the saw table for the second saw blade must consequently have a width which at least corresponds to the maximum displaceable distance for the saw blade.
    From the longitudinal section in Fig. 2 it appears that the axis of rotation 11 of the second saw blade 9 is located in the same vertical plane above the axis of rotation 8 of the first saw blade 6. In this way the sawing machine can be made very compact but it should be understood that placed in relation to each other in different vertical planes. As can also be seen, both saw blades have the same direction of rotation according to the rotation arrows 12.
    More specifically, the direction of rotation is such that the lower saw blade 6, which saws the wood with its upper part, during sawing will attack the wood with a force directed towards the feed direction of the wood, which is illustrated by a feed arrow 13, while the upper saw blade 9, which saws the timber with its lower part, will attack the timber with a force directed in the feed direction of the timber. Both saw blades also attack the wood with a force component that is directed downwards towards the feed table so that the wood will be pressed against it. Fig. 2 illustrates that the feeding table also comprises two feeding devices which during sawing feed the wood through the machine and each of which has a lower, rotating driven feed roller 14, the upper mantle surface of which is located immediately above the upper surface of the feeding table 3, and an upper non-driven pressure roller 15 which presses the wood downwards towards the feeding table and the respective feeding roll. The stop also shows a stop 16 which according to the invention is arranged in line behind the lower saw blade 6.
    Fig. 3 schematically illustrates the edge sawing machine in a top view with the upper part of the casing removed so that the feed table 3, the lower 6 and the upper 9 saw blade and the stop 16 become clearly visible. On the feeding table is a piece of wood 5 which is being sawn and fed through the machine in the direction of the feeding arrow 13. A first power arrow 17 shows the direction of the force with which the lower saw blade 6 attacks the wood 5, while a second power arrow 18 shows the direction of the force with which the upper saw blade 9 attacks the wood. As can be seen, the lower and upper saw blades attack the wood with forces which are opposite and substantially equal. The risk of the wood returning is thus drastically reduced because the forces essentially take each other out. The opposite attack forces further mean that the wood that is sawn will be affected by a rotating moment, which is illustrated by the curved arrow 19 in fi g 3, ie the part of the wood that has already been sawn, and thus has passed the saw blades, will be pressed in the direction against the counter-rotating saw blade, which in this exemplary embodiment is the lower saw blade 6. This relationship is used according to the invention in such a way that the stop 16 is placed in line with and behind this saw blade and in that the wood is always pressed by the force of the saw blades in one direction. it is possible to obtain a very reliable linear sawing with great precision and with a device which is simple and inexpensive, namely with a single stop 16 placed in line with and behind the counter-rotating saw blade 6.
    A prerequisite for a stop 16 to be able to be used in the manner described above in order to obtain a safe and reliable linear control of the wood, is that the stop has a thickness which does not exceed the thickness of the saw blade in at least an effective part of the stop. An active part of the stop refers to the part of the stop that comes into contact with and controls the wood. Fig. 4 shows an enlargement of a cross section through the feed table 3, the stop 16 and parts of the saw blades 6, 9 during sawing of a piece of wood 5. The operative part of this stop extends from the feed plane 4 up to the upper edge of the stop 16, i.e. the distance marked ai fi guren. The stop is attached to the feeding table by the stop being bent 90 ° at its lower edge and screwed into the underside of the feeding table. Here, the stop thus has a thickness which far exceeds the thickness of the saw blade, but it is irrelevant in that it is in a place which is not an effective part of the stop because it is below the feed plane.
    权利要求:
    Claims (12)
    [1]
    Edge sawing machine for simultaneous parallel sawing of opposite longitudinal edges and thus width adjustment of a piece of wood (5), comprising a feed table (3) whose upper side fi nines a feed plane (4) along which the piece of wood is longitudinally fed during sawing, and a first and a second saw blade which are rotatable in the same direction of rotation (12) but of which the first saw blade (6) is rotatably mounted on a rotation shaft (8) located below the feed plane while the second saw blade (9) is rotatably mounted on a rotation shaft (11) located above the feed plane, which results in one of the saw blades during sawing attacking the piece of wood with a force (17) acting against a feed direction (13) of the wood while one of the saw blades engages the piece of wood with a force (18) acting in the feed direction, and wherein at least one of the position of the saw blades is adjustable in the longitudinal direction of the axis of rotation to enable adjustment of the sawing distance between the two saws. the blades, characterized in that a stop (16) is arranged in line with and in the area immediately behind the saw blade which acts on the piece of wood (5) with a force (17) directed towards the feed direction (13), wherein at least an effective part (a) of the stop has a thickness which does not exceed the thickness of the saw blade.
    [2]
    Edge sawing machine according to claim 1, characterized in that it is provided with a stop in line with and in the area immediately behind only the saw blade which acts on the piece of wood (5) with a force (18) directed towards the feed direction ( 13).
    [3]
    Edge sawing machine according to claim 1 or 2, characterized in that the direction of rotation of the saw blades (12) is such that the first saw blade (6) acts on the piece of wood (5) with a force (17) directed towards the feed direction (13). ), the stop (16) being arranged in line with and behind the first saw blade. 10 15 20 25 30 536 027 12
    [4]
    Edge saw according to one of the preceding claims, characterized in that the operative part (a) of the stop (16) extends between the feed plane (9) and an upper edge of the stop.
    [5]
    Edge sawing machine according to one of the preceding claims, characterized in that the first saw blade (6) has an axed position while the second saw blade (9) is adjustable in the longitudinal direction of the axis of rotation (11).
    [6]
    Edge sawing machine according to one of the preceding claims, characterized in that the feed table (3) lacks all forms of delimiting means above the feed plane (4) at a longitudinal edge of the feed table in order to enable sawing of pieces of wood (5) which have larger width than the width of the feeding table.
    [7]
    Edge sawing machine according to claim 6, characterized in that the feed table (3) lacks all forms of delimiting means above the feed plane (4) at the longitudinal edge of the feed table which is located closest to the second saw blade (9).
    [8]
    Edge saw machine according to one of the preceding claims, characterized in that the stop (16) has a length which is at least equal to half the diameter of the saw blade.
    [9]
    Edge saw machine according to one of the preceding claims, characterized in that the stop (16) has a length of at least 30 cm.
    [10]
    Edge saw machine according to one of the preceding claims, characterized in that the stop (16) has a length of between 0.5-2 m.
    [11]
    Edge sawing machine according to one of the preceding claims, characterized in that the stop (16) has a height of between 20-50 mm.
    [12]
    Edge saw machine according to one of the preceding claims, characterized in that the machine does not have a return protection.
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    同族专利:
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    引用文献:
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    US7686045B2|2004-12-23|2010-03-30|Black & Decker Inc.|Apparatus and method for creating a flat surface on a workpiece|CN103507116B|2013-09-25|2015-04-22|临汾市壬水节能建材有限公司|Multifunctional edge sawing and seaming machine|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1151134A|SE1151134A1|2011-11-29|2011-11-29|Kantsågmaskin|SE1151134A| SE1151134A1|2011-11-29|2011-11-29|Kantsågmaskin|
    EP12194465.6A| EP2599600B1|2011-11-29|2012-11-27|Edge sawing machine|
    US13/687,830| US20130160893A1|2011-11-29|2012-11-28|Edge sawing machine|
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