Sawing device

Abstract

Sawing device with a linearly reciprocating workpiece carrier (9) with a support surface (93) for a workpiece (W) and a saw blade (11) extending parallel to a linear direction of movement of the workpiece carrier (9), wherein the saw blade (11) is a pull saw blade which cuts the workpiece (W) when the saw blade (11) is pulled through a workpiece (11), wherein the saw blade (11) is held at its pull-side end so as to be pivotable about a stationary axis of rotation (D) perpendicular to the linear direction of movement and is resiliently pretensioned to pass through the plane of the support surface (93) of the workpiece carrier (9), and wherein the axis of rotation (D) is arranged between the plane of the support surface (93) and a straight line extending along the toothing (111) of the saw blade (11) facing the workpiece.

Description

[0001] The invention relates to a sawing device.

[0002] Especially in the DIY sector, when cutting strips, squared timber, smaller boards and the like with hand saws such as a hacksaw, fine saw, etc., unintentionally crooked cuts are achieved, which means that the overall work result is unsatisfactory.

[0003] There are a variety of saw guides, such as miter boxes or magnetic guides, which require some practice to achieve good results. Miter saws with a positively guided saw blade are also known, but these are bulky. With all of these devices, the user moves the saw, i.e., the saw blade, and—even with a positively guided saw blade—has an influence on the cut.

[0004] In contrast, the object of the invention is to propose a sawing device which, with a simple structure, ensures a sawing process that is easy to carry out and achieves good results.

[0005] This object is achieved with a sawing device according to claim 1.

[0006] The sawing device according to the invention has a linearly reciprocating workpiece carrier with a support surface for a workpiece and a saw blade extending parallel to a linear direction of movement of the workpiece carrier. The saw blade is a pull saw blade that cuts the workpiece when the saw blade is pulled through it. The saw blade is pivotally mounted at its pull-side end about a fixed axis of rotation perpendicular to the linear direction of movement and is resiliently preloaded to penetrate the support surface of the workpiece carrier. The axis of rotation is arranged between the plane of the support surface and a straight line extending along the toothing of the saw blade.

[0007] The sawing device according to the invention can be designed as a table-top unit and set up on a workbench. A support surface of the workpiece carrier faces the user, and the saw blade protrudes upwards from the support surface with its teeth pointing upwards. If in this case a workpiece to be sawn is secured to the support surface - e.g. clamped firmly - the saw blade is pressed beneath the support surface against the spring-loaded restoring force of the spring-loaded saw blade. A small part of the teeth of the saw blade, which is inclined to the support surface, now rests against the workpiece with a contact force that corresponds to the restoring force. If the workpiece carrier is now moved, the workpiece slides along the stationary but pivoting saw blade, supported on the teeth, and is sawn in the process. In the saw according to the invention, the contact force is greater than the restoring force.During the return movement, the workpiece slides on the saw blade in the saw gap with a contact force that is at most equal to the return force or even smaller than the return force; the saw blade does not cut or does not catch or hardly catches the workpiece.

[0008] This effect is achieved by the special arrangement of the rotation axis, where - in the case described - the rotation axis is located below the main plane of the support surface but above the toothing (i.e. above a straight line extending along the tooth tips of the toothing) of the saw blade. The rotation axis runs perpendicular to the linear direction of movement of the workpiece carrier and perpendicular to the pivoting plane of the saw blade. The saw blade is held at the fixed rotation axis and can only pivot about the rotation axis. If a tensile force is exerted on the toothing of the saw blade by the cutting engagement of the saw blade with the workpiece, the saw blade strives to follow the tensile force.The distance between the straight line extending along the toothing and the rotation axis forms a lever arm around the rotation axis, so that the saw blade is pushed toward the workpiece by the tensile force acting on the lever arm in addition to the spring-loaded restoring force. Conversely, the return movement of the workpiece carrier in the opposite direction creates a thrust force on the lever arm, pushing the saw blade away from the workpiece and gliding in the saw gap with little contact force.

[0009] In this way, the workpiece can be sawn by simply sliding the workpiece carrier back and forth and it is not necessary to additionally press the saw blade against the workpiece during the forward movement and to separate it from the workpiece during the return movement or to actively reduce the pressure.

[0010] Because the user only performs a forced movement of the workpiece carrier relative to the sawblade when the workpiece is secured to the workpiece carrier, the sawing process is not, or hardly, influenced by unintentional user influence. In particular, no skewed relative movement is generated between the workpiece and the sawblade, even if inadvertently skewed forces act on the workpiece carrier. This means that straight cuts are achieved regardless of the user's skill level.

[0011] The saw blade is a pull saw blade, which cuts the workpiece when the saw blade is pulled through the workpiece. This means that the relative movement corresponds to a pulling movement of the saw blade through the workpiece. In the present sawing device, this relative movement is created by holding the saw blade in place and sliding the workpiece along it.

[0012] In addition to the mechanism described above, a single-sided saw blade automatically straightens itself when the workpiece is guided straight along it for cutting and pulled against the workpiece. Such saw blades are commercially available and are also known as Japanese saws. Because the pull saw blade only has to withstand a pulling force, the saw blade can be very thin, so that a small amount of material removal, the amount of sawdust, needs to be generated to make the cut. This minimizes the amount of work required during sawing and makes the process quick.

[0013] The saw blade is pivoted around a fixed pivot point at its pull-side end. This design is simple and inexpensive to implement.

[0014] In an advantageous embodiment, the position of the rotation axis is selected such that the angle spanned between the plane of the support surface and the straight line extending along the toothing ranges from a maximum of 85° to a minimum of 10° during the sawing process. At an angle smaller than 10°, the sawing effect and thus the sawing progress are minimal.

[0015] Preferably, the position of the stationary rotary axis relative to the support surface of the workpiece carrier can be designed to be adjustable in height and / or position in the displacement direction of the workpiece carrier. The height adjustment can be used to influence the angular range - the pivoting range of the saw blade - of the saw; with sensitive materials, it can be helpful to reduce the maximum engagement angle of the saw - i.e., to set the saw more flatly - in order to prevent splintering or similar damage to the workpiece. With an adjustable position of the rotary axis in the displacement direction of the workpiece carrier, longer cuts can also be made by keeping the workpiece clamped and carrying out the sawing process with several successive position adjustments of the rotary axis along the linear direction.

[0016] For right-angled cuts, a plane containing the support surface and a plane containing the sawblade's path of travel should be perpendicular to each other. To perform inclined cuts, the sawing device can be designed to adjust the inclination of a plane containing the support surface relative to a plane containing the sawblade's path of travel. This can be achieved, for example, if the workpiece carrier, which is guided on rails, has an adjustable support plate on which the workpiece rests.

[0017] The saw blade is preferably elastically pre-tensioned by means of an elastic band to penetrate the support surface of the workpiece carrier and engage the workpiece. A longer elastic band results in only a slight change in spring force for small deflections, so that a virtually constant restoring force and thus contact force of the saw blade on the workpiece is achieved, regardless of how far the saw blade is pivoted. Alternatively, a spring arrangement or weight force can be used. Even with springs, there are solutions with virtually constant restoring force using so-called constant springs. Particularly simple designs can offer solutions that use weight force; a lever with a weight rotating around the rotation axis or a pulley on the rotation axis with a weighted cord wound on it are possible solutions.

[0018] In a preferred embodiment of the sawing device, the rotational axis of the saw blade is arranged below the support surface of the workpiece carrier, and the teeth of the saw blade extend along the upper edge of the saw blade. This embodiment allows a clear view of the cut and the sawing device is compact and easy to store.

[0019] However, it is also possible to design the sawing device so that the saw blade's rotation axis is positioned above the support surface of the workpiece carrier, with the saw blade's toothing extending along the lower edge of the saw blade. In this case, the rotation axis lies above the plane of the support surface and below the straight line that accommodates the saw blade's toothing.

[0020] In an advantageous embodiment of the sawing device, the saw blade is held in a holder whose axis of rotation runs perpendicular to the saw blade body and perpendicular to the linear direction of movement of the workpiece carrier. The axis of rotation is located between the straight line accommodating the toothing of the saw blade and the plane of the support surface. Here, the holder can also removably hold the saw blade, allowing for replacement. Furthermore, with this design, the means for generating the restoring force can also be coupled to the holder, providing considerable design freedom for determining the axis of rotation and the point of application of the means for generating the restoring force.

[0021] The holder can be equipped with adjustment devices for fine-tuning the alignment of the rotary axis in the two remaining directions perpendicular to the linear movement. This allows for precise alignment of the saw blade with the linear movement direction and enables precise angled cuts.

[0022] Working with the sawing device is simplified if the workpiece carrier is equipped with a stop for resting on a workpiece that runs perpendicular to its linear direction of movement. This supports the workpiece against the tensile force exerted by the saw blade. If you also want to make angled cuts safely, the workpiece carrier can be equipped with optionally adjustable stop devices. This allows the workpiece to be aligned at a predetermined angle to the linear direction of movement of the workpiece carrier by resting it on the stop devices. For this purpose, a stop can be provided that is continuously adjustable between a position perpendicular to the linear direction of movement and a position almost parallel to the linear direction of movement. Locking points can also be provided at, for example, 22.5°, 30°, 45°, 60°, etc. for quick adjustment of the stop.

[0023] Further advantageous embodiments are shown in the remaining subclaims.

[0024] The invention will be explained in more detail below using a preferred embodiment with reference to the drawing. Fig. 1 a sectional side view of the sawing device according to an embodiment, Fig. 2 a partially sectioned plan view of the sawing device from Fig. 1, Fig. 3 a schematic side sectional view of the sawing device from Fig. 1 to illustrate the movement sequences of a workpiece and a saw blade of the sawing device during the sawing process and Fig. 4 a schematic representation of the force relationships on the saw blade and the holder.

[0025] According to Fig. 1, a sawing device has a base plate 1, which is Fig. 1 , and on which a tower 20 consisting of a base 2 and a mast 3 is mounted. Side plates 4 and a web plate 41 together form a bracket 42 which is attached to the tower 20. The orientation of the bracket 42 is adjustable by a Fig. 1 horizontal axis (not shown) running parallel to the plane of the drawing. A holder 5 is mounted on the side plates 4 of the holder 42 via bearings (not shown) and is rotatable about the center of the bearings on an axis 53. The holder 5 can rotate about an axis of rotation D, which is perpendicular to the plane of the drawing. Fig. 1, parallel to the main plane of the base plate 1 and through the center of the axis 53. The holder 5 consists of two holding plates 52, which clamp and hold a saw blade 11 between them.

[0026] The saw blade 11 has a toothing 111 along the upper edge of the saw blade 11, which faces the top of the sawing device. The toothing 111 of the saw blade 11 is designed such that the saw blade 11 is a pull saw blade. A pull saw blade is a saw blade that cuts the material when it is pulled at one end (in the case of hand saws, the handle, in Fig. 1 the holder 5) is pulled through the material, or a corresponding relative movement is generated between the workpiece and the saw blade.

[0027] The holder 5 is connected to a rubber band 6, which is guided over deflection rollers 7. The rubber band 6 is pre-tensioned during operation of the sawing device, so that the saw blade 11 strives to move in Fig. 1 in a pivoting movement upwards until it reaches and engages a workpiece W.

[0028] In Fig. 1 in the image plane behind the side plate 4, one side of a cuboid column 8 is shown on the base plate 1, which is fixedly mounted on the base plate 1. The column 8 carries a sliding mechanism 81, 82 on its side facing the saw blade 11 and on its opposite side, which is implemented by a full-extension ball bearing slide from furniture construction. Two holding bodies 92 are attached to each sliding mechanism 81, 82, which are connected to a workpiece carrier 9. The sawing device has two cuboid columns 8 (see Fig. 2) which are each provided with a displacement mechanism 81, 82 on both sides. The sawing device has two workpiece carriers 9, which are coupled together for joint movement, forming a gap between them for the saw blade 11 to pass through, and are each held linearly displaceably on one of the columns 8 via the associated displacement mechanisms 81, 82.

[0029] Both workpiece carriers 9 are each connected to four holding bodies 92, with two holding bodies 92 being attached to an associated displacement mechanism 81, 82. The workpiece carrier 9 is a plate which is fixed to one of its Fig. 1 left end has a stop 91 attached to which the workpiece W is placed and held against the resistance during sawing. The upper surface of the workpiece carrier 9 is a support surface 93 on which the workpiece W rests. A connecting web 94 at the end of the workpiece carrier 9 opposite the stop 91 and below the support surface 93 connects the two workpiece carriers 9. The connecting web 94 lies outside the pivoting range of the saw blade 11 and allows the joint sliding movement of the two workpiece carriers 9. For further coupling of the two workpiece carriers 9, the stop 91 also has a partial slot which does not completely divide the stop 91 in two and into which the saw blade can penetrate, while the section of the stop 91 which has no slot connects the two workpiece carriers 9 together with the connecting web 94.

[0030] In Fig. 1 it can also be seen that the axis of rotation D, about which the saw blade 11 pivots, is arranged between the extension of the direction of extension of the toothing 111 (imaginary extension of the upper edge of the saw blade with the toothing) and the plane of the support surface 93.

[0031] By means of the displacement mechanism 81, 82 and the holding bodies 92, the workpiece carrier 9 is in Fig. 1 is held movable to the right and left (according to double arrow P). Fig. 1 is not shown a second displacement mechanism with holding bodies, which is on the image plane of Fig. 1 facing away from the cuboid column 8, so that the workpiece carrier 9 is held parallel to the base plate 1 and can move in this plane.

[0032] Fig. 2 shows a partially sectioned plan view of the sawing device from Fig. 1. In Fig. 2, the right tool carrier 9 is shown partially in section, while the left workpiece carrier 9 has been omitted to show elements located under the plate-shaped workpiece carrier 9. On the left side in Fig. Figure 2 shows the cuboid column 8, which is composed of longitudinal plates 88 and transverse plates 87, which are mounted perpendicularly on the base plate 1. The sliding mechanisms 81, 82, which support the holding bodies 92, are attached to the longitudinal plates 88.

[0033] Below the left-hand sliding mechanism 81, 82, which is shown here in section, a tensioning lever 71 is attached, which is connected to the rubber band 6. The rubber band 6 is attached to the holder 5 and guided around several deflection rollers 7 to the tensioning lever 71. The rubber band 6 can be tensioned with the tensioning lever 71, whereby in the tensioned state of the rubber band 6, the saw blade 11 protrudes centrally between the two tool carriers 9 from a gap above the support surface 93 of the workpiece carriers 9. In the relaxed state of the rubber band 6, the saw blade 11 preferably falls back into the gap between the two cuboid columns 8.

[0034] The tower 20 is mounted on the base plate 1 between the two cuboid columns 8 and offset therefrom. The side plates 4 and the web plate 41 together form the U-shaped bracket 42, which holds the axis 53 rotatably. The tower 20 with the base 2 and the mast 3 with the attached U-shaped bracket 42 holds the holder 5 on the base plate 1 in a stationary but pivotable manner. The U-shaped bracket 42 is rotatable by a horizontal Fig. 1 and vertically in Fig. 2 is adjustably mounted on the mast 3, so that the horizontal alignment of the axis 53, around which the saw blade 11 pivots, is adjustable. This allows the path of the saw cut to be finely adjusted perpendicular to the main plane of the base plate 1 or the main plane of the workpiece carrier 9.

[0035] The holder 5, which holds the saw blade 11, is pivotally mounted on the side plates 4 by means of bearings (not shown) and the axis 53. The plane of pivoting movement of the saw blade 11 runs perpendicular to the main plane of the base plate 1 or perpendicular to the main plane of the workpiece carrier 9. The tower 20 can be rotated on the main plane of the base plate 1 about a screw (not shown) located in the base 2, which extends perpendicularly through the base 2 and the base plate 1. This allows the alignment of the saw blade 11 or the plane of pivoting movement of the saw blade to be adjusted relative to, and in particular parallel to, the direction of displacement of the workpiece carrier 9.

[0036] The Fig. 2 right workpiece carrier 9 is shown partially sectioned, so that one of the longitudinal walls 88 and one of the transverse walls 87 can be seen, and the stop 91 is indicated, which runs perpendicular to the direction of displacement and is attached to the workpiece carrier 9. Furthermore, Fig. 2 on the right, side at Fig. 2 upper end of the workpiece carrier 9 the connecting web 94, which is shown here in section, but extends continuously to the left workpiece carrier (in Fig. 2) is omitted and connects the two workpiece carriers 9 with each other.

[0037] In Fig. In Figure 3, the sequence of figures a, b, c, d shows a sawing process in a highly schematic manner. Fig. 3a shows the initial state in which a workpiece W rests on the workpiece carrier 9 and rests against the stop 91. The saw blade 11 is pre-tensioned to pivot about the rotation axis D to rest against the workpiece W. The toothing (not shown) on the upper edge of the saw blade 11 faces the workpiece W; it shows in the Fig. 3 always upwards. The workpiece carrier 9 is held on the column 8 so that it can be moved to the right and left. The movement takes place in Fig. 3 always horizontally according to the indicated arrow directions P.

[0038] The first saw stroke is carried out from Fig. 3a by moving the workpiece carrier 9 in the direction of the arrow P. The saw blade 11, which is elastically pre-tensioned against the workpiece W, cuts into the workpiece W and also deflects downwards against the pre-tensioning force. At the end of the movement according to Fig. 3b, the saw blade 11 is positioned flatter to the horizontal but has produced a cut of length s in the workpiece W that is inclined in depth.

[0039] Now, without removing the pre-tension from the saw blade 11, the workpiece carrier 9 together with the workpiece W is moved from Fig. 3b is shifted back to the left according to arrow P and the saw blade 11 slides in the saw cut and straightens up until the state of Fig. 3c is reached.

[0040] Based on this condition according to Fig. 3c, the workpiece carrier 9 is again shifted to the right according to arrow P. Because the saw blade 11 in this initial state continues to rest on the base of the saw cut, the workpiece W is further sawn through by the length 2s of the saw cut when the workpiece carrier 9 is shifted to the right until the state of Fig. 3d is reached. This process is repeated until the workpiece W is sawn through. By simply sliding the workpiece carrier 9 back and forth, the workpiece W fixed on the workpiece carrier 9 is sawn through.

[0041] In Fig. 4 shows a schematic detailed view of the forces and moments acting on the saw blade 11.

[0042] The rubber band 6 engages the holder 5 with the lever arm g. The force G of the rubber band 6 generates with the lever arm g a torque Mg in the counterclockwise direction around the rotational axis D. A tensile force V acting on the toothing 111 in engagement with the workpiece W during sawing and acting in the longitudinal direction of the saw blade has a lever arm h around the rotational axis D and generates a further torque Mv which also acts in the counterclockwise direction. Because torques in the same direction add up around the same axis, when the workpiece W is in Fig. 4 is shifted to the right, the resistance of the material to be sawn, the workpiece W, the tensile force V with the lever arm h, the additional torque Mv about the rotational axis D, which forces the saw blade additionally into contact with the workpiece. As a result, the saw blade 11 is pressed against the bottom of the saw gap with a force Dv=(Mg+Mv) / q, sawing the workpiece.

[0043] If the workpiece carrier 9 is in Fig. 4 is shifted to the left, a thrust force Z is generated on the toothing 111 of the saw blade 11. With the lever arm h, a torque Mz is thereby generated in a clockwise direction about the axis of rotation D, which is opposite to the always existing torque Mg of the rubber band 6, which is directed counterclockwise: When the workpiece carrier W is returned, the saw blade 11 is consequently pressed against the bottom of the saw gap with a force Dz = (Mg - Mz) / q, which is smaller than the pressure force Dv during the saw pull when shifting to the right.

[0044] The present arrangement of the rotational axis D, the toothing 111 (or its extension as a straight line), and the plane of the support surface 93 of the workpiece carrier 9 relative to one another thus results in an automatic increase in the compressive force of the saw blade 11 during the saw pull and an automatic reduction in the compressive force of the saw blade 11 during the return movement. This design makes it possible to keep a saw blade pre-tensioned against the workpiece without any change and to saw the workpiece by simply sliding the workpiece or workpiece carrier back and forth relative to the stationary saw blade.

[0045] The lever arm h directly influences the reinforcement effect during sawing. This can vary depending on the workpiece material, the geometry of the toothing, the preload, and other parameters. In the example, a fine Japanese saw blade was used, which was preloaded with approximately 60 N against the spruce wood to be sawn. A lever arm h of approximately 15 mm produced sufficient reinforcement during the saw pull, and the saw blade could glide in the saw gap without jamming during the return movement.

[0046] In the above example, the saw blade is arranged between two columns or workpiece carriers. One of the two workpiece carriers or the associated column can be omitted. In this case, the saw's design is particularly simple. The saw's function remains unaffected, but the workpiece support on both sides of the saw gap is eliminated. List of reference symbols 1 base plate 11 saw blade 111 Gearing 2 bases 20 Tower 3 masts 4 side plate 41 web plate 42 bracket 5 Recording 52 retaining plate . 53 Axis 6 elastic band 7 pulley 71 clamping lever 8th pillar 81,82 Sliding mechanism 87 Cross plate 88 Longitudinal plate 9 workpiece carriers 91 attack 92 holding bodies 93 contact surface 94 connecting bridge W workpiece D axis of rotation

Claims

[1] Sawing device with a linearly reciprocating workpiece carrier (9) with a support surface (93) for a workpiece (W) and a saw blade (11) extending parallel to a linear direction of movement of the workpiece carrier (9), wherein the saw blade (11) is a pull saw blade which cuts the workpiece (W) when the saw blade (11) is pulled through a workpiece (11), wherein the saw blade (11) is held at its pull-side end so as to be pivotable about a stationary axis of rotation (D) perpendicular to the linear direction of movement and is resiliently pretensioned to pass through the plane of the support surface (93) of the workpiece carrier (9), and wherein the axis of rotation (D) is arranged between the plane of the support surface (93) and a straight line extending along the toothing (111) of the saw blade (11) facing the workpiece. [2] Sawing device according to claim 1, characterized bythat the angle spanned between the support surface (93) and the straight line extending along the toothing (111) passes through an angular range of a maximum of 85° to a minimum of 10° and preferably of 85° to 30° during the sawing process. [3] Sawing device according to claim 1 or 2, characterized by that the position of the fixed axis of rotation (D) is adjustable in height relative to the support surface (93) of the workpiece carrier (9). [4] Sawing device according to claim 1, 2 or 3, characterized by that the position of the fixed axis of rotation (D) is adjustable in the direction of displacement of the workpiece carrier (9). [5] Sawing device according to one or more of claims 1 to 4, characterized by that a plane containing the support surface (93) and a plane containing the movement path of the saw blade (11) are perpendicular to each other. [6] Sawing device according to one or more of claims 1 to 4, characterized bythat the inclination of a plane containing the support surface (93) is adjustable relative to a plane containing the movement path of the saw blade (11). [7] Sawing device according to one of claims 1 to 6, characterized by that the saw blade (11) is elastically pre-tensioned by means of a rubber band (6) to pass through the support surface (93) of the workpiece carrier (9) and to engage with a workpiece (W). [8] Sawing device according to one of claims 1 to 6, characterized by that the saw blade is elastically pre-tensioned by means of a spring arrangement to penetrate through the support surface of the workpiece carrier and to engage with a workpiece. [9] Sawing device according to one of claims 1 to 6, characterized by that the saw blade is pre-tensioned by weight to penetrate through the support surface of the workpiece carrier and to engage with a workpiece. [10] Sawing device according to one or more of the preceding claims, characterized by that the axis of rotation (D) of the saw blade (11) is arranged below the support surface (93) of the workpiece carrier (9) and the toothing (111) of the saw blade (11) extends along the upper edge of the saw blade (11). [11] Sawing device according to one or more of the preceding claims 1 to 9, characterized by that the axis of rotation of the saw blade is arranged above the support surface of the workpiece carrier, with the teeth of the saw blade extending along the lower edge of the saw blade. [12] Sawing device according to one or more of the preceding claims, characterized bythat the saw blade (11) is held in a holder (5) whose axis of rotation (D) is oriented perpendicular to the saw blade body (11) and parallel to the support surface (93); runs perpendicular to the linear direction of movement of the workpiece carrier (9) and is arranged between a straight line running along the toothing (111) of the saw blade (11) and the support surface (93). [13] Sawing device according to claim 12, characterized by that the holder (5) is provided with adjusting means for adjusting the orientation of the axis of rotation (D) in one or both directions perpendicular to the linear direction of movement. [14] Sawing device according to one or more of the preceding claims, characterized by that the workpiece carrier (9) is displaceably mounted relative to the saw blade (11) by means of plain bearings, linear ball bearings and / or ball-bearing full extensions (81, 82). [15] Sawing device according to one or more of the preceding claims, characterized bythat the workpiece carrier (9) is provided with a stop (91) running perpendicular to its linear direction of movement for contact with a workpiece (W). [16] Sawing device according to one or more of the preceding claims, characterized by that the workpiece carrier is provided with optionally adjustable stop means in order to align the workpiece by contact with the stop means at a predetermined angle to the linear direction of movement of the workpiece carrier. [17] Sawing device according to one or more of the preceding claims, characterized by that the workpiece carrier has clamping devices with which the workpiece can be fixed on the support surface. [18] Sawing device according to one or more of the preceding claims, characterized by that the workpiece carrier has gripping surfaces so that it can be pushed back and forth manually. [19] Sawing device according to one or more of the preceding claims, characterized by that the workpiece carrier is coupled to an electric drive device in order to be electrically pushed back and forth. [20] Sawing device according to one or more of the preceding claims, characterized by that the workpiece carrier (9) has support surfaces (93) for the workpiece (W) on both sides of the saw blade (11). [21] Sawing device according to one or more of the preceding claims, characterized by that the workpiece carrier (9) has a support surface (93) for the workpiece only on one side of the saw blade (11).

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