Crossbar attachment for panel saws with a quick-connect device for fast, temporary connection of the crossbar attachment to the sliding table

Abstract

Cross-arm device (15) for a sawing device with a sliding table (3), in particular for a panel saw (1) with a sliding table (3), comprising a base body (16) with a first contact edge (28) for a workpiece to be machined, and a side guide (27) with a second contact edge (29) for the workpiece to be machined, wherein the second contact edge (29) forms an angle with the first contact edge (28), wherein the side guide (27) can be moved along the base body (16) by means of an adjustment device and can be temporarily locked in different positions by means of a locking device (20, 21), further comprising a quick-connect device for the quick, temporary connection of the cross-arm device (15) to the sliding table (3) of the sawing device, wherein the quick-connect device is designed as an engagement device in a guide table groove (10) of the sliding table (3),characterized in that the engagement device is located on the underside of the base body (16) of the transverse cantilever device (15) and is designed as a web device with at least one longitudinal profile (23) with a rounded wedge-shaped cross-section, and the longitudinal profile (23) is designed corresponding to the guide table groove (10), such that by placing the transverse cantilever device (15) in a suitable position on the sliding table (3), a self-locking, wedge-shaped connection of the engagement device with the corresponding guide table groove (10) of the sliding table (3) is formed based on the gravity of the transverse cantilever device (15), which is designed in such a way that it leads to a sufficiently firm fastening between the transverse cantilever device (15) and the sliding table (3), also in the longitudinal direction or in the displacement direction of the sliding table (3),such that, under the forces typically occurring, there is no displacement of the transverse cantilever device (15) in the guide table groove (10) of the sliding table (3), and wherein the transverse cantilever device (15) has a planar, essentially board-like base body (16), and the base body (16) of the transverse cantilever device (15) is tapered in the free-floating area outside the sliding table (3).

Description

[0001] The invention relates to a transverse support device for a sawing device with a sliding table, in particular for a panel saw with a sliding table, for holding a workpiece during a sawing operation. The invention further relates to a sliding table device for a sawing device, in particular a sliding table device for a panel saw, and to a sawing device, in particular a panel saw.

[0002] When using saws, especially power saws, safety precautions are essential to prevent injuries, particularly serious ones. This is especially true for high-speed saws, such as circular saws, as the likelihood of an accident is comparatively high, and the typical severity of injuries when an accident occurs is also relatively high. Typical injuries include not only severe lacerations but also the amputation of limbs, especially fingers.

[0003] Due to the potential for danger, a wide variety of devices and other aids are already known in the prior art to prevent accidents as far as possible, or at least to limit the effects in the event of an accident.

[0004] An example from the field of circular saws is a so-called blade guard, sometimes also called a protective hood. This prevents – at least to a certain extent – ​​unintentional contact with the rotating saw blade. Depending on the design, such protection protects against access from above; if side panels are present, it also provides protection from the side. Nowadays, most blade guards are hinged, so that they almost completely enclose the saw blade and are only opened as needed when a workpiece is fed into the saw. It is undisputed that such blade guards have prevented a large number of accidents.

[0005] However, problems arise when the workpiece to be sawn is so large that the distance between the edge of the workpiece and the saw blade is relatively small during processing. In this case, it is unavoidable that the workpiece must be guided very close to the saw blade. To prevent injuries, push guides are often used. If the distance to the saw blade is misjudged, the push guide may be damaged; however, it prevents injury to the operator.

[0006] Another device for preventing accidents is the so-called "Fritz and Franz" sawing aid, the use of which is recommended by the German Social Accident Insurance Institution for the Wood and Metal Industries (Berufsgenossenschaft Holz und Metall). This sawing aid uses two rectangular holding blocks that are attached to the sliding table of a circular saw. The workpiece is clamped securely between the two holding blocks, which thus act as a kind of clamping jaw. To prevent the workpiece from slipping, a rubber coating can be applied to the edges of the holding blocks facing the workpiece. When using this sawing aid, the workpiece can be advanced by moving the sliding table – and thus at a safe distance from the saw blade.

[0007] In some cases, the use of a push handle is also recommended, which is attached to one of the two holding blocks (“Fritz” or “Franz”).

[0008] A system similar to "Fritz and Franz" is commercially distributed by RUWI GmbH in 78737 Fluorn-Winzeln under the name "RUWI Sicherheitssystem Formatkreissäge" for panel saws from various manufacturers as of the priority date of this application.

[0009] Another problem arises when particularly long, straight edges need to be cut. Since even slight angular deviations lead to a noticeable offset at the two ends of the sawn workpiece with long edges, the workpiece must be guided as precisely as possible at an angle during sawing.

[0010] For saws, so-called "parallel fences" have proven effective. These are positioned laterally offset from the saw blade in the feed direction. Their length largely corresponds to the orientation of the saw blade and thus to the feed direction of the workpiece (hence "parallel"). However, especially with circular saws, the saw blade can jam if the parallel fence is aligned exactly parallel to the saw blade's orientation / the workpiece's feed direction. For this reason, parallel fences are now positioned at a slight angle to the saw blade's orientation. Although the angle is small, this can still result in a disruptive misalignment at both ends of the workpiece when cutting long edges.

[0011] To enable more precise guidance of the workpiece being cut, cross-arm devices are used for sliding tables of panel saws. These are typically bolted to the sliding table at a 90° angle to the table's longitudinal axis / direction of movement. They also feature a side fence that can be moved along the length of the cross-arm device, i.e., perpendicular to the sliding table's longitudinal axis. The angle formed by the side fence and the cross-arm device ensures good guidance of the workpiece relative to the saw blade when the workpiece is pressed against the respective longitudinal edges of the cross-arm device and the side fence. However, experience has shown that even with these devices, slight angular misalignments can easily occur, which, with sufficiently long workpieces, can lead to noticeable and disruptive misalignment errors at both ends of the workpiece.

[0012] In principle, the previously mentioned "Fritz and Franz" saw guide also allows for fairly precise guidance of the workpiece relative to the saw blade. However, practical experience has shown that even when using this saw guide, small angular errors can easily occur when clamping the workpiece between the two holding blocks (clamping jaws), leading to corresponding angular errors and thus a corresponding lateral offset at both ends of the sawn workpiece.

[0013] AT 107 171 B discloses an auxiliary device for edging circular saws, which consists of a right-angled triangle formed by strips, on one leg of which a guide piece projecting in front of one of the triangular surfaces is arranged, which is intended to engage with one of the transverse slots of the worktable of the edging circular saw.

[0014] German patent DE 20 14 378 A describes a sliding table saw with a sliding table that moves parallel to the saw blade. An auxiliary support table, connectable to and movable with the sliding table, is provided. The auxiliary support table has at least one retractable stop for the workpiece to be cut. The retractable stop can be lowered perpendicular to the plane of the saw blade until it is below the support surface for the workpiece formed by the auxiliary support table.

[0015] DE 82 23 345 U1 proposes a stop device for joinery circular saws with a cantilevered feed carriage that can be guided parallel to the support table for cutting stacked boards. The stop device can be connected to the feed carriage parallel to a stop profile on the feed carriage, which rests on the carriage itself. In the area of ​​the support table, the stop device is stepped upwards at a distance from the support table to form a longitudinal arm and extends across the width of the support table as a cantilever. The cantilever has supports on both sides of the saw blade and at each end, directed perpendicular to the support table.

[0016] DE 103 25 063 A1 describes a panel saw with a saw table and a saw blade mounted in the saw table. A stop mounted on at least one guide is provided, and the stop can be aligned both parallel to the cutting line defined by the saw blade and at an angle to it.

[0017] DE 60 2004 007 431 T2 describes a machine for machining panels, comprising: a worktable consisting of a fixed support part and a part that is movable in both directions along a feed direction and is designed so that the panel to be cut can slide; a machining tool positioned on the fixed part of the table; a support frame for the panel to be machined, which is attached to the movable part and is in a plane with it; wherein the frame has a first stop for the panel, which is positioned perpendicular to the feed direction and is equipped with an adjustable stop bar for the panel, which is perpendicular to the first stop and can slide along the first stop;a second stop for the plate, which is slidably attached to the movable section and is equipped with first stop and reference means for a first side of the plate, these means being arranged at the end of the second stop and designed to allow the first side to be moved back by a predetermined dimension relative to the tool, thereby defining a trimming dimension that can be removed from the opposite, second side of the plate; wherein the first stop and reference means have first parts for setting the trimming dimension that can be removed from the plate.

[0018] US 2005 / 0 056 130 A1 describes a feeding device for a table saw, comprising a sliding board mounted slidably on one side of the table saw's worktable and having a direction of movement corresponding to a saw blade. The sliding board has two grooves formed on opposite sides, each parallel to the sliding board's direction of movement. A movable seat is selectively slidably mounted on one side of the sliding board. A push rod is laterally slidably attached to the movable seat and has a first end that forms a thrust surface for abutting a reference surface of a workpiece. A first and a second locking device extend through the push rod and the movable seat, respectively, to selectively hold the push rod and the movable seat in position to confirm a cutting angle of the workpiece.

[0019] DE 10 2016 122 519 A1 relates to a saw unit for a circular saw, which comprises: a scoring saw unit attachable to a base frame with a scoring saw tool rotatably mounted in a scoring bearing unit about a scoring axis of rotation, a scoring drive unit for driving the scoring saw tool into a rotational movement about the scoring axis of rotation, a pivoting device for pivoting the scoring saw tool relative to the base frame about a horizontal pivot axis that is perpendicular to the scoring axis of rotation, a scoring width adjustment device for adjusting the scoring width of the scoring saw tool, and a scoring width actuator for driving the scoring width adjustment device.When in a pivot position with a horizontal scoring axis, the scoring width actuator is at least partially arranged at a distance from a horizontal plane passing through the scoring axis that is less than half the scoring saw blade diameter, and is arranged within a region bounded by a first and a second plane that intersect along the pivot axis, the first plane extending downwards from the pivot axis at an angle of 45° and the second plane extending downwards from the pivot axis at an angle of -45°.

[0020] German patent DE 603 ​​01 906 T2 discloses a device for measuring bevel cuts on panels in circular sawing machines. The device comprises a base; a horizontal worktable mounted on this base for moving a panel to be cut along a feed direction; a circular saw blade whose axis runs substantially parallel to the worktable; and a measuring bar mounted on the worktable, extending from the saw blade and equipped with a stop for the panel to allow a reference value to be displayed on the measuring bar. The measuring bar is angularly movable on the worktable to assume a number of angular positions relative to the feed direction, with one side of the panel to be cut resting against the measuring bar.

[0021] DE 20 2008 004 439 U1 discloses a panel saw with a stop rail, a cutting tool, and a cutting line defined by this cutting tool, wherein the stop rail is arranged on a worktable and has two axes of rotation, each of which is movably guided in a pivot guide on the worktable. The stop rail is longitudinally displaceable with respect to both axes of rotation.

[0022] CN 1 03 624 840 A proposes a numerically controlled precision sliding table saw comprising a saw frame, a support plate workbench attached to the saw frame, a movable workbench attached to the saw frame, a saw blade deflection device arranged under the movable workbench, and a longitudinal support plate device arranged on the support plate workbench.The saw blade deflection device is used to control the sawing of an angled piece of wood; the longitudinal support plate device is used to control the width of the sawn wood; and the saw blade deflection device and the longitudinal support plate device are both set in a numerical control mode, so that the entire machine is convenient to operate, the width of the sawn wood is set quickly and accurately, the saw blade deflection angle is easily detected, the saw width and bevel angle sawing accuracy of the wood are effectively improved, and the machining quality and machining efficiency are improved.

[0023] It is therefore obvious that there is still a need for devices that offer a high level of workplace safety on the one hand, and on the other hand enable sawing that is as accurate and precise as possible, even of long cutting edges.

[0024] Naturally, such devices should be economically affordable, and furthermore, as easy and quick to use as possible.

[0025] The object of the present invention is therefore to propose a transverse boom device for a sawing device which is improved compared to known transverse boom devices for sawing devices.

[0026] A further object of the invention is to propose a sliding table device that is improved compared to sliding table devices known in the prior art. Likewise, a further object of the invention is to propose a sawing device that is improved compared to sawing devices known in the prior art. A transverse boom device according to claim 1, a transverse boom arrangement according to claim 6, a sliding table device according to claim 7, and a sawing device according to claim 8 achieve these objects.

[0027] For this purpose, a transverse cantilever device for a sawing device with a sliding table is proposed, which has the features according to claim 1.

[0028] It is therefore proposed to design a cross-arm device for a sawing device with a sliding table, comprising a base body with a first contact edge for a workpiece to be machined, and a side guide with a second contact edge for the workpiece to be machined, wherein the second contact edge forms an angle with the first contact edge, wherein the side guide can be moved along the base body by means of an adjustment device and can be temporarily locked in different positions by means of a locking device, such that a quick-connect device is provided for the rapid, temporary connection of the cross-arm device to the sliding table of the sawing device. The sawing device with sliding table can, in particular, be a panel saw with a sliding table.

[0029] Sawing devices with a sliding table are known in the prior art. In these devices, a workpiece (or parts thereof) can be placed on the sliding table and moved together with the table. The sliding table can typically only be moved in a single linear direction, with the direction of movement typically corresponding to the orientation of the saw blade (this does not preclude the possibility that the sliding table can also be adjusted in other directions, for example, for calibration purposes). With such a design, long, straight cuts are particularly easy to perform. For the sake of completeness, it should be noted that the sawing device can have not only a single saw blade, but possibly also multiple saw blades.For example, circular saws often use not only the main saw blade but also a pilot saw blade, which is used, for instance, to prevent uneven material chipping on the surface of the workpiece. For the sake of completeness, it should also be noted that these are generally machine-driven sawing devices, such as electrically driven sawing devices, hydraulically driven sawing devices, pneumatically driven sawing devices, and mechanically driven sawing devices (steam engine, steam turbine, water wheel, transmission, and the like).

[0030] Crossbar attachments for such sliding tables or sawing devices are also generally known in the prior art. These are typically (essentially) permanently attached to the sliding table. The term "essentially" "permanently" is to be interpreted as meaning that regular removal and reattachment of the crossbar attachment to the sliding table is not intended. However, this does not preclude the possibility of removing the crossbar attachment, for example, for maintenance or repair purposes. Typically, several screw connections are used for this purpose, possibly with the use of anti-rotation devices (locking compound, lock nuts, and the like). The crossbar attachments are typically aligned at a right angle (90°) to the longitudinal extent of the sliding table or to the direction of movement of the sliding table.Lateral guides for transverse boom devices are also known in the prior art, wherein the lateral guides can be moved along the transverse boom device. In particular, a defined lateral offset to the saw blade can be set using these lateral guides. It is also possible to use offset indicator devices, such as mechanical distance scales (meter scales), electronic distance scales, or the like.When adjusting the lateral guide, the locking mechanism of the lateral guide of the cross-jib device is first released. The lateral guide is then moved to a suitable position using the adjustment mechanism (for example, with the aid of an offset indicator). Finally, the locking mechanism secures the lateral guide in this position to prevent unwanted movement. The adjustment mechanism can be designed as a sliding carriage that moves along the base of the cross-jib device. To ensure proper guidance of the sliding carriage / adjustment mechanism, guide rail-like devices can be incorporated into the base of the cross-jib device.The locking mechanism can, for example, be a device that operates using spring force, a bayonet fitting, a screw thread, and / or similar mechanisms. It should be noted, however, that the adjustment mechanism is designed to be regularly released and locked (moving position and locking position of the adjustment mechanism), and should therefore be quick and easy to operate.

[0031] It is proposed that the cross-arm device proposed here may have a fundamentally comparable functionality and, if applicable, a fundamentally similar design to already known cross-arm devices. However, it is specifically proposed that the cross-arm device include a quick-connect mechanism for the rapid, temporary connection of the cross-arm device to the sliding table of the sawing device. It is therefore intended that the cross-arm device will be regularly attached to and removed from the sliding table. It is also intended that the cross-arm device will be regularly positioned in different positions, particularly in different positions along the direction of travel of the sliding table / along the longitudinal direction of the sliding table. The quick-connect mechanism may include locking means of any type.Locking devices may be omitted. Locking devices serve, in particular, to effectively prevent the cross-arm device from unintentionally detaching from the sliding table and / or any unwanted relative movement between the cross-arm device and the sliding table. Such a locking device may, for example, be in the form of a quick-release screw (possibly with a handle), a bayonet fitting, or the like. Surprisingly, however, it has often been found that such locking devices are even unnecessary without any noticeable negative consequences. This is especially true when such a cross-arm device is used in combination with a second cross-arm device (which may have such locking devices, or...).which is more or less permanently fixed to the sliding table – i.e., potentially a cross-arm device according to the prior art). It is proposed that the quick-connect device be designed such that it creates a connection between the cross-arm device and the sliding table that prevents them from moving relative to each other under typical forces occurring during a sawing operation (especially if no locking device is provided / if only the quick-connect device is used). Naturally, a kind of "safety margin" can also be provided, which could be, for example, 100%, 200%, 300%, 400%, 500%, or more. This means, for example, that with a 100% safety margin, the holding force is twice the force "actually" required.

[0032] The proposed transverse cantilever device can be designed such that it has a fixed / rigid angle (particularly with respect to the first contact edge) to the sliding table / longitudinal extent of the sliding table / direction of movement of the sliding table. Additionally or alternatively, this angle can be (essentially) a right angle. It is also conceivable that a variable angle can be set by means of an angle adjustment device. Preferably (but not necessarily), the set angle can be temporarily locked (particularly by means of a locking device). Furthermore, it is possible that the lateral guide means of the transverse cantilever device is designed such that the angle between the second contact edge of the lateral guide means and the first contact edge of the transverse cantilever device is (essentially) fixed / rigid / unchanging.However, it is also possible to set different angles here (in particular by means of a temporarily lockable angle adjustment device). The lateral guide, the adjustment device and / or the locking device of the proposed transverse boom assembly can, moreover, be designed analogously to constructions known in the prior art for transverse boom assemblies (in particular those described above).

[0033] It is further proposed to design the transverse cantilever device such that the quick-connect device is designed as an engagement device in a groove of the sliding table, with the engagement device being located on the underside of the base body of the transverse cantilever device. Additionally, it is proposed to design the transverse cantilever device such that the engagement device is designed as a web-like device with a rounded, wedge-shaped cross-section. Furthermore, several engagement devices can be provided. This allows the transverse cantilever device to be easily and temporarily fixed to or removed from the sliding table.In particular, the design, especially the proposed design, allows for a comparatively high resistance to displacement of the transverse cantilever device relative to the sliding table, especially in the longitudinal direction of the sliding table or in the direction of its displacement. Since, according to the present proposal, the engagement device is rounded, wedge-shaped, and / or chamfered, a self-locking and / or conical connection can be achieved. Although additional locking devices can be provided, it is often sufficient for the quick-connect device to be self-locking, supported by gravity. In simpler terms, the transverse cantilever device is brought into a suitable position and then holds itself in that position by gravity.In this context, it should be noted for the sake of completeness that commercially available sliding tables for sawing devices generally have one or more grooves extending lengthwise along the table / aligned with the sliding table's direction of travel. These are used for various fastening purposes and are usually designed to accommodate T-nuts. While the size, number, and relative arrangement (especially spacing) of the sliding table grooves (when multiple grooves are present) vary from manufacturer to manufacturer, it is possible (and practical) to produce and distribute differently designed quick-connect devices for different manufacturers, as the number of manufacturers of sawing devices with sliding tables remains manageable.It is also possible for the quick-connect device to be designed and configured in such a way that it can be adapted to different manufacturers of sawing devices. This can be achieved, for example, by attaching the engagement device (the relevant profiles) to the base body of the cross-arm device using screws that are screwed into threaded sleeves.

[0034] The crossbar assembly, in particular its base, can now be fitted with multiple threaded sleeves / a threaded sleeve array adapted for sliding tables from different manufacturers (e.g., at least two, three, four, or more). Adjusting the quick-connect device can then be easily accomplished by simply "re-screwing" (or initially screwing on) the profiles to a suitable location.

[0035] Furthermore, it is proposed that the transverse cantilever device have a flat, essentially board-like base. This allows for a secure hold of the quick-connect device in the sliding table grooves and thus a secure hold of the transverse cantilever device on the sliding table. Moreover, thanks to the relatively flat base of the transverse cantilever device, space can be provided for additional devices besides the side guides, such as handles, push aids, scales, and the like.

[0036] Furthermore, the base body of the transverse cantilever device tapers in the freely suspended section outside the sliding table. This allows for a simple mass distribution that improves the stability of the transverse cantilever device on the sliding table without the need for additional fastening devices such as locking mechanisms or the like. This provides a particularly advantageous and simple, yet functional benefit to the transverse cantilever device. The taper is typically located in a direction away from the sliding table (or preferably and / or predominantly in an area spaced away from the sliding table).Accordingly, the base body is generally particularly flat (wide; extending in the direction of the longitudinal extent of the sliding table) in the area of ​​contact with the sliding table, whereas the base body is rather narrow at a distance from the sliding table (non-contact area with the sliding table). The tapering can be abrupt (a change directly from one dimension to a second dimension), but also continuous (a kind of triangular shape at least from a certain point onwards), or the like.

[0037] Furthermore, it is proposed to design the transverse cantilever device such that the adjustment mechanism includes a sliding carriage. This facilitates particularly simple and precise adjustment of the lateral guide. In particular, the sliding carriage can also be designed to be captive, at least within a certain range / circumference. Furthermore, a sliding carriage can easily implement a functionality that allows the lateral guide to move in only one direction (one-way movement).

[0038] Furthermore, it is proposed to design the transverse cantilever device such that the adjustment mechanism includes a quick-release locking device, preferably a rotary knob, and particularly preferably at least one threaded element. With the aid of such a quick-release locking device, the lateral guide can be moved into the required position particularly easily and quickly, and temporarily fixed in that position. Using a rotary knob (especially a rotary knob with a threaded element) allows for a mechanically simple yet intuitive quick-release locking device. Moreover, manual locking and unlocking can be performed quickly and easily.Particularly when using a rotary knob device, no tools are required to operate the quick-release fastener (although other designs are of course conceivable where the use of tools is unnecessary). Furthermore, when using a threaded device, particularly high holding forces can be achieved easily and without significant effort.

[0039] Another advantageous embodiment of the cross-cantilever device can be achieved if the side guide has a gripping device with which the side guide can be positioned in a corresponding side guide position by mechanically gripping the position of a side guide of a corresponding cross-cantilever device with its second contact edge. In particular, this allows for an aligned arrangement of the respective second contact edges of the two side guides. That is, the imaginary straight line connecting the two contact edges of the side guides and extending them can be aligned essentially parallel to the longitudinal extent of the sliding table / essentially parallel to the direction of movement of the sliding table / parallel to the orientation of the saw blade. This allows for particularly simple parallel cuts.Furthermore, the use of the gripping device makes it possible to adjust the side guide using a measuring scale (corresponding to a specific size specification of the workpiece to be manufactured) in this way for only one side guide. While such an adjustment is not overly complex, the required, typically rather tight tolerances necessitate precise work, which takes a certain amount of time (even several minutes). With the gripping device proposed here, this time-consuming, precise adjustment is only required once. The single, precise adjustment is easily transferred to the other side guide by simple mechanical gripping. Another advantage of the proposed design is that errors due to inaccurate adjustment or...These problems can be easily and simply avoided by incorrect adjustment, for example because one has the wrong value "in mind".

[0040] In particular, it is possible for the transverse boom device to be designed such that the side guide has a projecting nose that tapers relative to the base of the side guide. The nose sensibly has a width that corresponds to the thickness of the corresponding side guide. The side edge of the tapered nose adjacent to the second contact edge of the side guide is typically positioned offset from this second contact edge by the width of the corresponding side guide. For the sake of completeness, it should be noted that side guides of known, commercially available transverse boom devices are typically planar / flat and have a comparatively small thickness in the centimeter range (for example, in the range of 0.5 cm, 0.75 cm, 1 cm, 1.5 cm, or 2 cm).Furthermore, what has been said above regarding different manufacturers of sawing devices - and correspondingly different dimensions - applies analogously.

[0041] Furthermore, a transverse boom arrangement is proposed, comprising a first transverse boom device and a second transverse boom device, wherein at least one, preferably exactly one, of the transverse boom devices is designed as a transverse boom device according to the present disclosure. The other transverse boom device may optionally be a transverse boom device known in principle from the prior art (in particular, a transverse boom device known from the prior art as described in the present disclosure as belonging to the prior art). In this way, a particularly simple and advantageous guidance of workpieces to be machined relative to the saw blade of a sawing device can be achieved. In particular, the transverse boom device proposed here can exhibit its inherent advantages and properties to a particularly advantageous degree.Furthermore, the proposed crossbar arrangement, or at least one / exactly one crossbar device, can be used in conjunction with commercially available crossbar devices, sliding table devices and / or saw devices, thereby promoting the simple and cost-effective use of devices according to the proposal made here.

[0042] Furthermore, a sliding table device for a sawing device is proposed, in particular a sliding table device for a panel saw, which includes at least one cross-arm device or cross-arm arrangement according to the present disclosure. Here, too, the advantages and properties already described can arise in at least an analogous manner. A further development of the sliding table device in accordance with the present disclosure is also possible in at least an analogous manner.

[0043] Furthermore, a sawing device, in particular a panel saw, is proposed which includes a cross-bar arm device according to the present disclosure, a cross-bar arm arrangement according to the present disclosure, and / or a sliding table device according to the present disclosure. Here, too, the properties and advantages already described can arise, at least analogously. Likewise, it is possible to further develop the saw arrangement according to the present disclosure, at least analogously.

[0044] Further advantages, features and objectives of the invention will become apparent from the following detailed description of the invention in conjunction with the associated drawings, the drawings showing: Fig. 1: A panel saw with a sliding table and two cross-arm devices in a schematic top view; Fig. 2: a transverse cantilever device according to the present disclosure in a schematic top view from below; Fig. 3: a transverse cantilever device according to the present disclosure in a schematic side view, which is inserted into a sliding table of a panel saw.

[0045] Fig. Figure 1 shows an arrangement of a panel saw 1 with a sliding table 3 and a first crossbar 9, also referred to as a first crossbar device 9, in a schematic top view.

[0046] As is generally known in the prior art, a panel saw 1 has a saw table 2 and a sliding table 3. In a suitable recess 4 in the saw table 2, a circular saw blade 5 is arranged in the transition area between the saw table 2 and the sliding table 3, which extends towards the viewer over the working plane 6 formed by the saw table 2 and the sliding table 3. Fig. The sliding table 3 can be moved parallel to the alignment of the circular saw blade 5 (in Fig. 1 up and down), which is indicated by a double arrow.

[0047] In the lower right area of ​​the saw table 2 of the panel saw 1, a so-called parallel fence 7 can be seen. This is mounted on the saw table 3 and can be adjusted laterally towards the circular saw blade 5 by means of an adjustment device (not shown in detail here). Fig. 1 to the left) or away from this (in Fig. 1 to the right) which in Fig. 1 is represented by a corresponding double arrow. By adjusting the rip fence 7 accordingly, it is possible to perform a cut in which the workpiece is guided along the right side of the rip fence 7. To prevent jamming between the workpiece and the circular saw blade 5, the rip fence 7, with its guide surface 8, is not aligned exactly parallel to the circular saw blade 5. Rather, a small angle α of typically 1° or 2° is provided. Although this prevents jamming during the sawing process, the angle α of the guide surface 8 of the rip fence 7 results in a significant offset between the two ends of the workpiece being cut, especially with long edges.For example, in practice, offsets of between 1 mm and 5 mm at the two opposite ends of the cut edge are commonly found in door blanks. This means that the blanks cannot be used as is and must be reworked. It is easy to see that this is undesirable.

[0048] Accordingly, some panel saws 1, according to the prior art, have a first crossbar 9 which is attached to one end of the sliding table 3. The first crossbar 9 is rigidly connected to the sliding table 3 in such a way that it remains permanently attached to the sliding table 3 during normal working hours. This does not preclude the possibility of removing the first crossbar 9 from the sliding table 3 for special sawing tasks or for maintenance or repair work. A typical fastening method for the crossbar 9 consists of a plurality of screw connections, with corresponding screws being screwed into correspondingly arranged T-nuts with internal threads (not shown in detail here). The T-nuts are arranged in the guide grooves 10 of the sliding table 3 in a manner known per se.

[0049] The first crossbeam 9 also includes a sliding carriage 11, which can be moved along the first crossbeam 9 ( Fig. 1 to the left and right; also indicated by a double arrow). The sliding carriage 11 can be locked and released in different positions by a locking device which is not shown in detail here.

[0050] A first side guide 12 is arranged on the sliding carriage 11, which is moved together with the sliding carriage 11, and can thus be positioned at different distances (offset) from the circular saw blade 5.

[0051] One of the longitudinal side edges of the first cross member 9 forms a first contact edge 13 (vertical contact edge; perpendicular contact edge; transverse contact edge; contact edge aligned perpendicular to the orientation of the circular saw blade 5) of the first cross member (in Fig. 1 the lower longitudinal edge of the first transverse arm 9), while one of the side edges of the first side guide 12 forms a second contact edge 14 (parallel contact edge; longitudinal contact edge; contact edge aligned parallel to the orientation of the circular saw blade 5) (in Fig. 1 the right side edge 14 of the first side guide 12).

[0052] A workpiece to be sawn can be positioned with one of its corner areas against the first support edge 13 of the first cross member 9 and against the second support edge 14 of the first side guide 12, thus contacting each of them. This allows for a certain degree of support and guidance of the workpiece, enabling the circular saw blade 5 to make a straight cut of high quality when the sliding table 3 is moved. In particular, with such positioning of the workpiece, no angular error α is required for safety reasons, as is the case with the parallel fence 7.

[0053] In practice, however, it has been shown that the positioning of the workpiece at the two contact edges 13, 14 on the first cross member 9 or on the first side guide 12 is often not carried out with sufficient precision under actual working conditions. This still regularly results in angular errors and thus a lateral offset of the two ends of the cut edge of the sawn workpiece.

[0054] To solve this problem, it is proposed here to provide a second transverse boom 15, also referred to as a second transverse boom device 15 (see also Fig. 2 and Fig. 3, where the second crossbeam 15 is shown in further views).

[0055] The crossbeam 15 has a plate-like base body 16. A second sliding carriage 17 is provided on the base body 16 (in this case, on its upper surface) of the second crossbeam 15, which is located in a groove-like channel 18 formed by two L-shaped retaining profiles 19 (see in particular Fig. 3), can be moved along the second crossbeam 15 (in Fig. 1 to the left and right; in Fig. 3 towards or away from the viewer; in Fig. 1 indicated by a double arrow). Side stops can be provided at the ends of the groove-like channel 18 (not shown here) so that the sliding carriage 17 cannot be easily pushed out of the groove-like channel 18 (anti-loss device).

[0056] The second sliding carriage 17 can be moved by means of a rotary movement (in) using a rotary handle 20, which is non-rotatably connected to a clamping screw 21. Fig. (1 indicated by a further double arrow) are fixed in their respective positions by friction. For this purpose, the clamping screw 21 is provided with an external thread which interacts with a corresponding internal thread 22 provided in the second sliding carriage 17. By turning the rotary handle 20 in the opposite direction, the friction-fit locking mechanism can be easily released.

[0057] The attachment of the second transverse arm 15 to the sliding table 3 is designed to be easily reversible (quick-release coupling device). In the present embodiment, two longitudinal profiles 23 are located on the underside of the base body 16 of the second transverse arm 15, which have a slightly angled and rounded cross-section (especially in Fig. (as shown in Figure 3). The longitudinal profiles 23 are arranged such that they correspond to the guide grooves 10 of the sliding table 3 and can thus be inserted into the guide grooves 10 by simply "dropping" / "releasing" the base body 16 of the second cross member 15. Due to gravity, the cross-sectional shape of the longitudinal profiles 23 on the underside of the base body 16 of the second cross member 15, and the shape of the base body 16 of the second cross member 15 (explained in more detail below), simply placing the second cross member 15, in a suitably aligned position, onto the sliding table 3 results in a sufficiently secure attachment between the second cross member 15 and the sliding table 3. In particular, the second cross member 15 does not fall off the sliding table 3 when it is released.Furthermore, the forces that typically occur do not cause any displacement of the second transverse arm 15 (or the longitudinal profiles 23 of the second transverse arm 15) in the guide table grooves 10 of the sliding table 3.

[0058] Especially in the Fig. 1 and Fig. Figure 2 shows the preferred shape of the base body 16 of the second transverse boom 15. In an area of ​​the base body 15, where it is in the deployed state (see Figure 2), the shape is 2. Fig. 1) is in contact with the surface of the sliding table 3 (support area 24 in Fig. 1), the basic body 16 has a comparatively large width (distance between top and bottom edges in Fig. 1) provided. In the free-floating area 25, however, the base body 16 is designed to taper 26. Due to the taper 26, the center of gravity of the second crossbeam 15 is advantageously shifted into the support area 24 of the second crossbeam 15.

[0059] As can be seen from the figures, a second lateral guide 27 is provided on the second sliding carriage 17 of the second transverse arm 15. The second lateral guide 27 has a second contact edge 29, whereas the base body 16 has a first contact edge 28.

[0060] If the lateral positions (distance to the circular saw blade 5) of the first side guide 12 and second side guide 27 are appropriately selected (or the second contact edge 14 of the first cross member 9 and the second contact edge 29 of the second cross member 15), and the distance between the first cross member 9 and the second cross member 15 (or the first contact edge 13 of the first cross member 9 and the first contact edge 28 of the second cross member 15) is appropriately selected, the workpiece can be gripped by the different contact edges 13, 14, 28, 29 in such a way that even very long cuts can be made with the circular saw blade 5 without any angular error or offset between the two ends of the cut edge of the sawn workpiece. This significantly reduces the error rate and considerably increases production efficiency.

[0061] To achieve the simplest and most precise lateral positioning of the first side guide 12 and the second side guide 27 (or of the second contact edge 14 of the first crossbar 9 and the second contact edge 29 of the second crossbar 15), the second side guide 27 is provided with a projecting nose 30. The projecting nose 30 is designed such that its side edge 31 adjacent to the second contact edge 29 of the second crossbar 15 has a recess b relative to the second contact edge 29 of the second crossbar 15. The width of the recess b corresponds to the thickness d of the first side guide 12 of the first crossbar 9. This allows the correct position to be determined mechanically in a simple manner. For this purpose, the first and second crossbar 9, 15 are first positioned adjacent to each other (with a sufficiently small gap between them).Subsequently, the second sliding carriage 17 of the second crossbeam 15 is moved so far that the side edge 31 of the projecting nose 30 of the second side guide 27 of the second crossbeam 15 comes into direct mechanical contact with the side edge 32 of the first side guide 12 of crossbeam 9 opposite the second contact edge 14. Thanks to the described setback b, which is adapted to the thickness d of the first side guide 12, the second contact edge 14 of the first side guide 12 and the second contact edge 29 of the second side guide 27 are aligned with each other.

[0062] It should be noted that one or more features of the detailed embodiment currently disclosed can be used in combination with the general description of the present disclosure.

Claims

[1] Cross-arm device (15) for a sawing device with a sliding table (3), in particular for a panel saw (1) with a sliding table (3), comprising a base body (16) with a first contact edge (28) for a workpiece to be machined, and a side guide (27) with a second contact edge (29) for the workpiece to be machined, wherein the second contact edge (29) forms an angle with the first contact edge (28), wherein the side guide (27) can be moved along the base body (16) by means of an adjustment device and can be temporarily locked in different positions by means of a locking device (20, 21), further comprising a quick-connect device for the quick, temporary connection of the cross-arm device (15) to the sliding table (3) of the sawing device, wherein the quick-connect device is designed as an engagement device in a guide table groove (10) of the sliding table (3),characterized by, that the engagement device is located on the underside of the base body (16) of the transverse cantilever device (15) and is designed as a web device with at least one longitudinal profile (23) with a rounded wedge-shaped cross-section, and the longitudinal profile (23) is designed corresponding to the guide table groove (10), such that by placing the transverse cantilever device (15) in a suitable position on the sliding table (3), a self-locking, wedge-shaped connection of the engagement device with the corresponding guide table groove (10) of the sliding table (3) is formed, based on the gravity of the transverse cantilever device (15), which is designed to provide a sufficiently firm fastening between the transverse cantilever device (15) and the sliding table (3), also in the longitudinal direction.in the direction of movement of the sliding table (3), whereby the transverse cantilever device (15) does not shift in the guide groove (10) of the sliding table (3) under the forces that typically occur, and wherein the transverse cantilever device (15) has a planar, essentially board-like base body (16), and the base body (16) of the transverse cantilever device (15) is tapered in the free-floating area outside the sliding table (3). [2] Transverse cantilever device (15) according to one of the preceding claims, characterized by , that the adjustment device has a sliding carriage device (17). [3] Transverse cantilever device (15) according to one of the preceding claims, characterized by that the adjusting device has a quick-locking device, which preferably has a rotary knob device (20), and particularly preferably has at least one threaded device (21). [4] Transverse cantilever device (15) according to any one of the preceding claims, characterized by , that the side guide means (27) has a gripping device (30, 31) with which the side guide means (27) can be positioned in a corresponding side guide position by mechanically gripping the position of a side guide means (12) of a corresponding transverse cantilever device (9) with the second contact edge (29). [5] Transverse cantilever device (15) according to one of the preceding claims, in particular according to claim 4, characterized by , that the lateral guide means (27) has a projecting nose (30) that tapers towards a base part of the lateral guide means (27). [6] Transverse boom arrangement comprising a first transverse boom device (9) and a second transverse boom device (15), wherein at least one, preferably exactly one of the transverse boom devices (9, 15), is designed as a transverse boom device (15) according to one of the preceding claims. [7] Sliding table device for a sawing device, in particular sliding table device for a panel saw (1), characterized by at least one transverse boom device (15) according to one of claims 1 to 5 or by a transverse boom arrangement according to claim 6. [8] Sawing device, in particular panel saw (1), characterized by at least one transverse boom device (15) according to one of claims 1 to 5, by a transverse boom arrangement according to claim 6 or by a sliding table device according to claim 7.

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