EP1839828A2 - Machining device, in particular circular saw - Google Patents

Abstract

The machine has a machining tool (3) that is pivotably designed as a pivoting device (2), and a protection hood (1) provided for the machining tool. The protection hood is coupled with the pivoting device to enable movement of the machining tool, where the protection hood is adjusted to the diameter of the machining tool. The machining tool and the pivoting device are arranged on a slide movable in a cut direction. The protection hood is connected with the slide to move the slide, and is detached for linear and pivoting movement of the slide.

Description

The invention relates to a processing machine, in particular circular saw, such. B. a sliding table saw with a pivotally trained by means of a pivoting machining tool and a protective cover for the machining tool.

Such processing machines, in particular circular saws are known as sliding table saws. Such sliding table saws must completely cover the blade for woodworking due to the accident prevention regulations, the saw blade, which exits above the workpiece, against contact. In such machines usually the protective cover is on a frame on the machine body attached. The guard can be adjusted in height so that it can be adjusted to the respective workpiece height or the height from which the saw blade protrudes from the workpiece. In the case of vertical saw cuts, it is customary to use a narrow protective hood in order not to cause unnecessary obstruction in the workpiece guide behind the saw blade, also in connection with the guide rule. However, most sliding table saws, including machine tools, are today designed as swiveling machines, at least in a range of 0 ° to 45 °. For oblique cuts must therefore be used instead of the narrow, a wide protective cover. This must be so wide that, even with the largest saw blade and in the most extreme setting, there is no collision between the saw blade and the protective hood rear wall or the protective hood side wall. The width or extent of the protective hood is thus defined at right angles or rearwards with respect to the cutting direction. Due to the use of narrow protective hoods, it often comes to damage these protective hoods or the machining tool, since the timely replacement for a diagonal cut, for example, was overlooked. Also, the wide hood is a hindrance to many works.

From the prior art, a processing device for splitting plate-shaped workpieces, in particular a panel sizing known, having a first support table for the workpieces and on the machine frame linear guide assemblies are provided to move the machining tool on a carriage in the cutting direction. The known processing device has a pressure bar to push the workpiece onto the support surface of the support table. The pressure bar is to be arranged above the cutting line and has a slot on the side facing the saw blade. The slot is only slightly wider than the thickness of the saw blade. Side next to the slot for the slot line bearing surfaces are provided in the pressure bar, which are also necessary to press the workpiece against the machine table. A pivoting movement of the saw blade with attached pressure bar inevitably leads to the collision of the saw blade with one of these bearing surfaces.

Based on the above-described prior art, it is an object of the invention, a processing machine, in particular circular saw, such. B. to propose a sliding table saw, in which the disadvantages of the prior art described no longer occur.

The object of the invention is achieved by a processing machine, in particular a circular saw, such as a sliding table saw, with a pivotable by means of a pivoting machining tool and a protective cover for the machining tool, which is characterized in that the protective hood is coupled to the pivoting device of the machining tool to the To follow movement of the machining tool. With this inventive solution, it is now given that generally narrow protective hoods can be used without having to fear that due to an adjustment of the adjustment of the machining tool, the protective cover could be damaged. Rather, the guard according to the invention is coupled to the pivoting device of the machining tool, so that it generally follows the same angle at each adjustment of this adjustment. This is a constant protection of the exiting saw blade, as prescribed, guaranteed. Damage to the protective cover, as often occurring in the prior art, is completely avoided. Furthermore, advantages are achieved by the inventive solution to the extent that retooling, from a narrow to a wider protective hood at a diagonal cut can also be completely avoided. This will of course make the entire machine more efficient.

Even with respect to the solution known from the prior art, which has a pressure bar which is arranged above the saw blade along the cutting line, the solution according to the invention offers the following advantages. In the solution known from the prior art, it is necessary or only possible to use the solution with the pressure bar in a variant of a sawing machine in which the saw blade is moved along the cutting line, for example on guideways or on a carriage. Although such a variant with a longitudinally movable arrangement of the saw blade is also possible according to the invention. However, it is not absolutely necessary. Rather, the solution according to the invention can also be used very well in a variant of a processing machine with a fixed, rotating processing tool (eg a saw blade), in which, for example, the workpiece is moved through the processing machine or by hand. In the prior art solution with a pressure bar, due to the design of the very narrow slot, which is necessary to provide sufficient pressure surfaces for the application of pressure to the workpiece, it is necessary that the pressure bar possibly be in position must be changed or crazy, to allow an oblique cut at all. Again, this is only possible to a limited extent, due to the formation of the slot with sibling pressure surfaces.

The design of the protective hood according to the invention is substantially adapted to the diameter of the saw blade and at least formed in its width such that a pivoting movement in one direction to a maximum of 45 ° or 46 ° deviating from the vertical in one direction is possible. The holding function, as is necessary in the prior art, is also not necessary according to the invention. Due to the fact that the protective hood is coupled to the swiveling device of the machining tool in order to either move the machining tool in a linear manner or also to swivel it to follow, it is possible that with insufficient space in the guard, this is then pivoted with or laterally moved linearly, to then again to make enough space for the saw blade available.

The invention is also distinguished from the prior art by the fact that the suction device can optimally extract the dust at the cutting line, since no pressure plates or Aufstellfüße or the like are present, which would hinder such suction. Also, no contamination can get under the constraints of the printing plates, for example, to lead there to damage to the surface of the workpiece. The invention accordingly has a number of significant advantages over the prior art, with all the previously described adverse effects of the prior art solutions being eliminated by the invention.

According to a development of the solution according to the invention, it is therefore provided that the protective hood, due to the coupling with the pivoting device, follows the movement of the machining tool with a linear movement, at least in one direction. This is preferred, for example, if the protective cover has a certain width and the protective cover should not permanently carry out the pivoting movement of the tool. For this purpose, it is provided that the protective hood can perform a linear movement, preferably at right angles to the cutting line of the machining tool, in order to position the protective hood in each case in a left or right of the machining tool or its cutting line. Thus, sufficient space is provided in each case on the pivoted side, so that the machining tool does not come into collision with the side wall and / or the rear wall of the protective hood.

Of course, it is also possible according to the invention that the protective hood due to the coupling with the pivoting device follows the movement of the machining tool by a pivoting movement analogous to the pivotal movement of the machining tool. In this embodiment, then each of the protective hood of the pivoting movement of the machining tool or its pivoting device follows directly and in the same angular position. In this case, therefore, the analog angle is controlled, which is also set for the machining tool or for the pivoting device.

A further development of the invention provides that the protective hood is essentially adapted to the diameter of the machining tool. Of course, a certain amount of leeway is given, so you do not have to change the guard when changing tools. But it makes sense not to choose the deviation too large in order to provide adequate protection, with little space and in particular for optimum suction.

Another aspect of the invention is characterized in that the machining tool with its circle in the pivoted position does not intersect the side wall of the guard at least in one of the end positions. This has already been described above and refers to a solution in which a linear movement of the protective hood follows either in a position to the left of the cutting line of the machining tool or to the right of the cutting line. It is possible that the protective hood for this movement is directly or indirectly connected to the pivoting device of the machining tool. The coupling can also be done so that a linear movement, for example, only takes place when there is a risk that the machining tool with its circle could possibly damage the protective cover. This is always the case when the circle of the machining tool with the side wall and / or rear wall of the guard in collision could.

A processing machine according to the invention is also characterized according to a variant in that a conveying device is provided for the transport of the workpiece and / or the workpiece is manually movable.

However, the invention can also be used in a processing machine in which the machining tool is movable on a guide track in the cutting direction.

It is advantageous if the machining tool and the pivoting device are arranged on a carriage which can be moved in the cutting direction. In this embodiment, it is also advantageous if according to a further variant, the protective hood is connected to the carriage in order to follow the movement of the carriage in the cutting direction.

The invention is characterized according to an advantageous development also by the fact that the protective hood for the linear and / or pivoting movement is switched on or coupled out. By this embodiment, it is possible, especially in the embodiments in which the guard is able to exert a linear movement, only to couple, if this makes the position of the machining tool also required. This can be done for example by appropriate sensors automatically or display the operator, so that a manual or semi-automatic coupling then takes place.

The processing machine according to the invention is characterized in a further embodiment in that the linear movement of the protective hood is provided at right angles to the cutting line of the machining tool or at right angles to the feed movement for the workpiece.

According to the invention, it is also provided that a rotation axis of the protective hood is provided, which is preferably identical or congruent with the pivot axis of the machining tool or the pivoting device and the protective hood follows the axis of rotation of the movement of the machining tool by a pivoting movement. According to the invention, it is further provided that a coupling, is preferably provided on a coupling means to connect the protective hood with the pivoting device or to separate from the pivoting device. It is also advantageous if the guard in the vertical direction or at right angles to a machine table or the support plane for the workpiece is adjustable. Thus, the altitude of the guard of the thickness of the workpiece can be adjusted. This is also a certain adjustability given, for example, when a larger blade is used.

According to the invention, it has also been found that it is advantageous if the protective hood is U-shaped and has the opening of the U to the machine table or to the support plane. It is also advantageous if the guard is adjustable in a first end position and in a second end position. The end positions are to be understood as each maximum external position with respect to the cutting line seen left or right next to the saw blade in the cutting direction.

According to the invention, it is also advantageous that the guard has such a width that allows a pivoting movement of the machining tool at an angle of ± 45 ° without a linear movement of the guard at least in one direction. Here is the following. If, for example, the machining tool is pivoted to the right as seen from the vertical, the protective hood can remain in the right-hand end position without causing a collision the side wall of the protective hood comes with the circle of the saw blade. If the saw blade is then pivoted in the other direction - 45 °, a linear movement of the guard is necessary to prevent a collision of the circle of the saw blade with the guard. In the left end position, however, an adjustment from 0 ° to -45 ° without an additional linear movement of the guard is possible.

The invention is characterized according to a further variant in that a suction nozzle for connecting a suction device is provided on the protective hood, which is preferably arranged on the closed side of the U or on the side facing away from the machine table. This allows optimal extraction of the dusts and chips that are produced during the cutting process. In this case, the arrangement of the suction nozzle on the side facing away from the machine table side is particularly advantageous because it leads to the fewest impediments to the transport of the workpiece and also not to disability according to provided pivoting movements.

The protective hood is coupled according to a development of the invention in such a way with the pivoting device that a linear movement takes place in one of the end positions only when the machining tool pivots in the direction of this position and a collision with the guard must be prevented. This variant has already been briefly touched on above.

The invention is of course further education also characterized in that further positions are provided between the end positions, which are in particular infinitely controllable. Thus, an intermediate position is made possible or it is also possible depending on the pivot angle position in the linear direction perpendicular to the saw blade or the cutting line. This is also true a direct coupling and a slightly narrower design of the guard possible than this is possible, for example, in a possible only in the two end positions adjustment of the guard.

A development of the processing machine according to the invention is characterized in that a coupling means is provided for the coupling of the pivoting device and / or the carriage for the machining tool with the protective hood. The coupling means may be formed, for example, as a Bowden cable, cable, as a train-pressure medium or the like. It serves to couple the protective hood with the pivoting device of the machining tool. Thus, for example, it is possible to form a part of the coupling agent as a Bowden cable and another part of the coupling means as guided in a guide sliding element or the like.

A variant of the processing machine according to the invention therefore suggests that the coupling means connects the protective hood with the pivoting device of the machining tool.

As already mentioned, the coupling means is provided as a Bowden cable in a variant of the invention. Bowden cables are very well suited for such couplings, since they are flexible on the other side but sufficiently rigid to safely transmit the desired pivoting movements. This transmission must be done without angle or time offset.

The coupling means is according to a development of the invention with a cylindrical body, for. B. a sheath at least partially out. Another part of the coupling means can then be guided in other guide elements. For this purpose, only exemplary holes or grooves in which the Coupling means can be arranged, called.

Another aspect of the processing machine according to the invention is indicated by the fact that at least one guide is provided for the protective hood, within which the pivoting movement of the protective hood is guided and / or limited. Thus, an always equal angle movement of protective hood and pivoting device is achieved and also allows the pivoting movement as smoothly as possible. In addition to the very precise guidance, it also offers the possibility of limiting this pivoting movement at certain angles. For this purpose, only the example of the angle of 46 ° in each case on the left and right are referred to from 0 °. Of course, the solution according to the invention also works when larger angular ranges are to be covered.

The guide is provided according to a variant of the invention on or in a carrier plate preferably formed of metal or plastic. This offers the advantage that you can provide this support plate for a very space-saving on the machine and at the same time the possibility that you can train very smoothly within this carrier plate, the guide as a sliding guide. In addition, it is possible to limit the pivoting movement within this carrier plate.

The carrier plate is furthermore preferably arranged on a frame, for example in the cutting direction behind a riving knife of the processing machine. Thus, it does not disturb the editing process in any way and is still cheap to obtain. The support plate is arranged at right angles to the cutting line of the machining tool.

The invention is further characterized in that the frame on the machine body or on a machine table preferred is arranged at the rear end of the machine body or on a machine table. This also serves a favorable arrangement of the entire coupling device for the protective hood, in order to ensure optimal conditions for processing here overall.

The invention is also characterized in that the frame is designed projecting or cantilevered. This also serves the optimum provision and sufficient space for processing or to not hinder the processing process by this frame. By the projection this is achieved. The carrier plate can also be arranged very space-saving on this cantilevered frame.

It is furthermore preferred if the guide is designed as a segment guide. A segment guide can be conveniently manufactured and in particular mounted cheaply. In the individual segments, the coupling agent can be arranged accordingly, so that here also a very practical solution is provided as an embodiment of the invention.

According to the invention, it is further provided that the axis of rotation of the protective hood or the guide is identical to the saw line in the table plane of the machine table or the axis of rotation of the pivoting device. This ensures that the protective hood generally follows the pivoting movement of the pivoting device.

A development of the invention provides that the guide is incorporated as a segment guide in the carrier plate. It is further preferred if the support plate protrudes only slightly above the saw line forward.

The invention is characterized according to a variant of the invention also characterized in that in the leadership as a segment trained guide a guide element is at least partially rolling or sliding mounted as a metal or plastic part. The sliding or rolling storage is therefore favorable to ensure a smooth running of the entire pivoting device. The resistances of such a rolling or sliding bearing is comparatively small, the pivoting takes place with little effort.

In an advantageous development of the processing machine according to the invention, provision is made for a second guide for the protective hood to be provided with a second guide element which can be arranged there in the carrier plate. With the second guide, an even more accurate guidance of the protective hood is made possible. Of course, this guide is designed as a rolling or sliding guide with accordingly provided corresponding to this guide arranged guide elements. The two guides are parallel.

Accordingly, a development of the solution described above proposes that a receiving groove, bore or the like for receiving at least a portion of the train pressure medium is provided on the linear guide. According to the invention, it is further provided that a pin is provided for connecting the tension-pressure means with the linear guide, which is fixed in a fixing opening. This is only a favorable of different ways of connecting the train-pressure medium with the linear guide or the guard.

The invention is also characterized in that the application or attachment points of the coupling means on the pivoting device and the protective hood or on the linear guide are the same, such that an angle-equal pivoting movement of pivoting device and protective hood is ensured.

For an angle-equal adjustment of protective hood and Verschwenkvorrichtung provides an embodiment of the invention, that the pins or the attachment points are arranged at an equal distance from the axis of rotation or the support plane of the machine table to the protective hood or the pivoting device.

It has furthermore been found that it is advantageous if, on a processing machine according to the invention, the coupling means constructed as a tension-pressure means has supports on which the latter is supported on the frame on the one hand and on the machine body on the other hand, for example with a jacket.

Furthermore, it is provided according to the invention that the tension-pressure element is connected to the linear guide on the one hand by means of the pin and on the other hand with the pivoting device of the saw unit by a further pin or another attachment point while maintaining the same mounting or movement radius.

A further variant of the invention is characterized in that a displaceable counterpart is provided on or in the linear guide, which is preferably adjustable via a threaded spindle. It is also advantageous if the guard is attached to a counterpart. Now it is given that you can change the height of the guard with the threaded spindle, if due to a corresponding diameter of the cutting tool this is required.

Another aspect of the invention is characterized in that processing tools with a diameter greater than 315 mm can be used on the processing machine. Especially when editing tools with larger diameter, the machine according to the invention is suitable as a particularly favorable use variant.

The invention is also characterized in that the pivoting device is pivotable at least on one side at an angle of 0 ° to 46 °. A further variant provides that the Verschwenkwinlcel is formed pivotable on both sides of the pivoting each 0 ° to 46 °, wherein the protective device in each case follows the angular position of the pivoting device.

The processing machine according to the invention is designed according to a further development as a woodworking machine. It is further preferred if the processing machine is a circular saw, in particular a sliding table saw.

Another aspect of the invention is characterized in that an actuator is provided for the pivoting movement of the protective hood, which is connected to the drive of the pivoting device, such that a particular synchronous adjustment of the pivoting device and protective cover angle takes place. Thus, the pivoting device and the protective cover according to the preceding embodiments are also coupled such that the protective cover follows the movement of the machining tool. A separate actuator is always appropriate when a controller is provided for example on the machine tool, by means of which this actuator is also controlled. The adjustment is advantageously synchronously to avoid collisions of the guard. The movement can be asynchronous taking advantage of the gap between the saw blade and the protective cover.

Accordingly, a development of the previously described variant of the invention proposes that the actuator can be controlled by a controller, preferably the control of the processing machine. It is also provided to provide for the control of the actuator own control device, which then the actuator for the pivoting movement of the protective hood controls accordingly.

Of course, it is also provided according to the invention that the actuator for the guard is directly controlled and the values for the adjustment of an arranged on the pivoting device angle encoder are given.

Alternatively, a direct control of the actuator of the protective hood with exactly the same values as for the swivel device is possible. The controller then supplies both actuators of the protective hood and the pivoting device.

It is further contemplated that the angular position of the pivoting device is determined in a variant of the invention of the position of the splitting wedge of the machine tool by a mechanical and / or electro-mechanical and / or optical scanning device and transmitted to the actuator for the protective hood.

The scanning device is arranged at a distance from the splitting wedge, wherein a preferred variant of the invention provides for arranging the scanning device on the linear guide.

The invention will be further described below with reference to embodiments.

Fig. 1a und 1b

Seitenansichten einer als Kreissäge ausgebildeten Bearbeitungsmaschine nach der Erfindung,

Fig. 2a bis 2c

Details der Ausführungsform der Erfindung nach Fig. 1 in einer Vorder-, Seitenansicht und einer Draufsicht
und

Fig. 3a bis 3c

weitere Ausführungsformen einer Bearbeitungsmaschine nach der Erfindung mit Schutzhaube in unterschiedlichen Stellungen.

Show it:

Fig. 1a and 1b

Side views of a machine designed as a circular saw machine according to the invention,

Fig. 2a to 2c

Details of the embodiment of the invention according to Fig. 1 in a front, side view and a Top view
and

Fig. 3a to 3c

Further embodiments of a processing machine according to the invention with protective cover in different positions.

FIGS. 1a to 2c will be described together in the following embodiment. The embodiment is not limited to a circular saw, although it is described with reference to this. On the contrary, the invention can be transferred to processing machines with a machining tool to be pivoted and a corresponding protective device.

Figures 1a and 1b show views of a formed as a sliding table sawing machine according to the invention. By the reference numeral 1 or 1 ', the guard is designated in different positions. The processing tool 3 is located once in a vertical position and once in a pivoted about 45 ° position 3 '. The pivoted position is designated on the pivoting device 2 in dashed line. On the pivoting device 2 is below a coupling means 5 is arranged, which is guided so up to the protective hood 1, that it connects these two elements together. The coupling means 5 is at least partially formed as a tension-pressure medium. In the embodiment shown, it is provided for example as a Bowden cable. The Bowden cable extends from the attachment point or further pin 15 on the pivoting device 2 to the protective cover 1 or the linear guide 10 (see FIG. 2a). There, a pin 13 is provided, which moves like a groove in a groove 14 through the coupling means 5 and is guided. The coupling agent is in a cylindrical body, for example a sheath 5/3 at least partially guided. As can be seen, the coupling means 5 here on the one hand on the machine body 9 via a frame 7 to the support plate 6 and from there to the protective hood 1 and the linear guide 10 out. The sheath 5/3 is supported on supports 5/1 and 5/2 once on the frame 7 and on the other hand on the machine body 9. This serves to ensure that the coupling means 5 securely transmits the pivoting movement of the swivel device 2. On the machine body 9, a machine table 9/1 is arranged. At this machine table 9/1, the frame 7 is attached as a cantilevered frame.

On the frame 7, a support plate 6 is arranged, which carries the guide 4, which is preferably incorporated as a segment guide in the support plate 6 carries. The support plate 6 is preferably formed of metal or of a suitable plastic material. For this purpose, it is provided according to a variant of the invention that provided in the guide 4 designed as a segment guide an unillustrated guide element for the guidance of the protective cover, which is mounted as a metal or plastic part rolling or sliding. This serves for a simple and easy pivotability for the protective hood 1. In FIGS. 2a and 2b, the guide 4 is also very clearly visible, which is arranged in the carrier plate 6. In the illustrated version of the invention, a second guide 4/1 is provided for the protective hood 1. This is also arranged in the support plate 6. In the support plate 6 is a groove 14 in which the coupling means 5 is fixed by means of a pin 13. In the figure 2a is very well seen that the coupling means 5 with the pin 13 in the pivoted position 13 '/ 14' is located. In the vertical position, it is provided next to the protective cover 1 on the linear guide 10.

By pivoting the pivoting device 2, the coupling means 5 moves and pulls or pushes the linear guide 10 in such a way that the protective hood 1 held there carries out a pivoting movement identical to the pivoting device 2. The groove 14 extends at least in sections parallel to the guide 4, 4/1.

The support plate 6 is fixed or arranged on the frame 7, which is preferably arranged in the cutting direction behind the riving knife 8 of the processing machine designed as a sliding table saw. The machining tool is in the embodiment a circular saw blade and carries the reference numeral 3. The frame 7 is preferably arranged in the rear end of the machine body 9, here on the machine table 9/1. As can be seen from the dashed representations, the protective hood 1 follows the movement of the swiveling device 2 due to the coupling with the coupling means 5. This takes place, in particular, at the same angle.

The guide 4 is preferably formed as a segment guide. In order to manufacture technology, in particular the straight and the curved elements can be produced separately from each other cheaper. The axis of rotation of the protective hood 1 and the segment guide is identical to the saw line in the table plane of the machine table 9/1, which is not specified or the axis of rotation A of the pivoting device. The segment guide can also be incorporated in the carrier plate 6 according to an embodiment of the invention. In this case, the support plate 6 projects only slightly above the saw line forward. The trained as a train-pressure element coupling means 5 is connected in the schematically illustrated variant of the invention with the linear guide 10 and a part.

On the linear guide 10 is also a sliding counterpart 12 is provided, which is adjustable via a threaded spindle 11. The protective hood 1 itself is attached to the counterpart 12. In this way, the height of the protective hood 1 relative to the sawing line or relative to the machining tool 3 can be changed, such that in each case an intervention in the rotational region of the machining tool 3 is reliably prevented by the protective hood 1. While FIG. 1a shows a front view of the processing machine according to the invention with the pivotal possibilities of the machining tool 3 in the positions 3 ', FIG. 1b shows a side view from which the design of the protective hood 1 and its arrangement on the processing machine can be better seen.

The reference numerals used in FIGS. 2a to 2c correspond to the reference numerals already presented in FIGS. 1a and 1b. FIG. 2a as a side view shows a detail of the processing machine according to the invention with the protective hood 1 in a swiveled position 1 '. The reference numeral 3 'denotes the machining tool, here a saw blade, also in the pivoted position. The coupling means 5 is attached to the protective hood 1 or to the linear guide 10, as already described. Here the upper part is shown. The coupling means 5 is also partially guided on or in the guide 4. In the figure 2b is a part of a front view to see in which only the attachment of the protective cover 1 on the counterpart 12 is visible. Furthermore, the adjustment of the protective cover 1 via the threaded spindle 11 is indicated schematically. This is also the figure 2c, but in a detailed view in section from above. It is also shown that the counterpart 12 is connected to a dovetail-shaped connection 121 with the linear guide.

Figures 3a to 3c show a further embodiment of a processing machine according to the invention with different Position of the machining tool 3 and / or the protective cover 1 in different positions. The embodiment, as presented in FIGS. 3 a to 3 c, is characterized in that the protective hood 1 has a U-shape and the U with its opening is, as it were, slipped over the cutting line of the machining tool 3. In this case, the width b is chosen so that in a pivoted position of the machining tool 3, the protective cover 1, as shown in Figures 3a and 3b, can remain in a single position. The protective hood 1 is, of course, as in the direction X of the double arrowhead in a first end position I and in a second end position II adjustable.

In FIGS. 3a and 3b, the protective hood 1 is in the first end position I. In FIG. 3b it can be seen that the machining tool 3 is pivoted to the left so that, when the protective hood 1 remains in the end position I, a collision of the circle of the saw blade would be done with the left boundary wall of the guard 1. For this reason, then follows the protective hood 1 of the movement of the pivoting device 2 and the movement of the machining tool 3 in the same direction to avoid this collision. The movement of the protective cover 1 is linear. In the preceding embodiments according to Figures 1 and 2, the protective hood 1 follows with a pivoting movement of the movement of the pivoting device 2 and the machining tool 3. As indicated by the double arrow for the vertical direction Y, the protective cover 1 is also adjustable in the vertical direction to changes To compensate for the diameter of the machining tool by changing the position in height.

At the side facing away from the machining tool 3 or the machine table 9/1 side is a suction nozzle 16 to which an extraction system can be connected. The Figures 3a to 3c represent only schematic representations in which was dispensed with the details of the execution with respect to the coupling. These details are described in detail in the description above and reference is expressly made to these parts of the description, in which a linear movement of the protective hood 1 is described at right angles to the cutting line of the machining tool 3. The pivot axis D for the machining tool shows that the machining tool according to a further variant of the invention can also be positioned so that the pivot axis D does not exactly correspond to the central axis of the machining tool 3, but may also lie outside this axis. For this purpose, a corresponding adjustment of the support for the machining tool 3 or the drive is necessary. However, these details are not essential to the invention and therefore not further elaborated.

The claims now filed with the application and later are attempts to formulate without prejudice to the attainment of further protection.

If, on closer examination, in particular also of the relevant prior art, it appears that one or the other feature is beneficial for the purpose of the invention, but not of decisive importance, it is of course already desired to formulate such a feature , in particular in the main claim, no longer having.

The references cited in the dependent claims indicate the further development of the subject matter of the main claim by the features of the respective subclaim. However, these are not to be understood as a waiver of obtaining independent, objective protection for the features of the dependent claims.

Features that have hitherto been disclosed only in the description may be claimed in the course of the method as of essential importance to the invention, for example to distinguish from the prior art.

Features which have been disclosed only in the description, or also individual features of claims comprising a plurality of features, may at any time be included in the first claim for distinction from the prior art, even if such features are associated with others Characteristics were mentioned or achieve particularly favorable results in connection with other features.

Claims (21)

Processing machine, in particular circular saw, such as a sliding table saw, with a pivotally formed by a pivoting machining tool and a protective cover for the machining tool, characterized in that the protective hood (1) with the pivoting device (2) of the machining tool (3) is coupled to the movement of the machining tool (3) to follow. Processing machine according to claim 1, characterized in that the protective hood (1) due to the coupling with the pivoting device (2) follows the movement of the machining tool with a linear movement, at least in one direction (X). Processing machine according to one or both of the preceding claims, characterized in that the protective hood (1) due to the coupling with the pivoting device (2) follows the movement of the machining tool by a pivoting movement of the machining tool (3) analog pivoting movement. Processing machine according to one or more of the preceding claims, characterized in that the protective hood (1) is substantially adapted to the diameter of the machining tool (3). Processing machine according to one or more of the preceding claims, characterized in that the machining tool (3) with its circle in the pivoted position, the side wall of the protective hood (1) at least in one of the end positions (I, II) does not intersect and / or a conveying device for the transport of the workpiece is provided and / or the workpiece is manually movable and / or the machining tool is rotationally fixed to the processing machine and / or the machining tool (3) is movable on a guideway in the cutting direction. Processing machine according to one or more of the preceding claims, characterized in that the machining tool (3) and the pivoting device (2) are arranged on a slide movable in the cutting direction and / or the protective hood (1) is connected to the carriage to the movement of the To follow the carriage and / or the protective hood (1) for the linear and / or pivoting movement is coupled or decoupled. Machining machine according to one or more of the preceding claims, characterized in that the linear movement of the protective hood (1) is provided at right angles to the cutting line of the machining tool (3) or for the advancing movement of the workpiece and / or an axis of rotation (A) of the protective hood (1) is, preferably identical or congruent with the pivot axis (D) of the machining tool (3) or the pivoting device (2), and the protective hood (1) follows the axis of rotation (A) of the movement of the machining line (3) by a pivoting movement. Processing machine according to one or more of the preceding claims, characterized in that a coupling is preferably provided on a coupling means (5) for connecting the protective hood (1) to the swiveling device (2) or separating it from the swiveling device (2) and / or the protective hood (1) in the vertical direction (Y) or at right angles to a machine table (9/1) or the support plane for the workpiece is adjustable and / or the protective cover (1) is U-shaped and the opening of the U to a Machine table (9/1) points. Processing machine according to one or more of the preceding claims, characterized in that the protective hood (1) in a first end position (I) and in a second end position (II) is adjustable and / or the protective hood (1) has such a width (b) , which allows a pivoting movement of the machining tool (3) at an angle of ± 45 ° or ± 46 ° without a linear movement of the protective hood (1) in at least one direction and / or a suction nozzle (16) for connecting a suction device to the protective hood ( 1) is provided, which is preferably arranged on the closed side of the U or on the side facing away from the machine table (9/1). Processing machine according to one or more of the preceding claims, characterized in that the protective hood (1) is coupled to the pivoting device (2) in such a way that a linear movement into one of the end positions (I, II) takes place only when the machining tool (3) pivots in the direction of this position and / or further positions between the end positions (I, II) are provided in particular infinitely controllable and / or for the coupling of the pivoting device (2) and / or the carriage with the protective hood (1) a coupling means (5) is provided. Processing machine according to one or more of the preceding claims, characterized in that the coupling means (5) is at least partially formed as a train-pressure means and / or the coupling means (5) is provided as a Bowden cable and / or the coupling means (5) in a cylindrical body z. B. a sheath (5/3) is guided at least partially. Processing machine according to one or more of the preceding claims, characterized in that at least one guide (4) for the protective hood (1) is provided, within which the pivoting movement of the protective hood (1) is guided and / or limited and / or the guide (4 ) is provided on or in a preferably made of metal or plastic carrier plate (6) and / or the support plate (6) on a frame (7), preferably in the cutting direction behind a riving knife (8) of the processing machine is arranged and / or Support plate (6) is arranged at right angles to the cutting line of the machining tool (3). Processing machine according to one or more of the preceding claims, characterized in that the frame (7) is arranged on the machine body (9) or on a machine table (9/1), preferably at the rear end of the machine body or table and / or the Frame (7) is designed projecting or projecting and / or the guide (4) is designed as a segment guide. Processing machine according to one or more of the preceding claims, characterized in that the axis of rotation (A) of the protective hood (1) or the guide (4) identical to the saw line in the table plane of the machine table (9/1) or the axis of rotation (A ) of the pivoting device and / or the guide (4) is incorporated as a segment guide in the support plate (6) and / or the support plate (6) projects only slightly beyond the saw line to the front. Processing machine according to one or more of the preceding claims, characterized in that in the guide (4) formed as a segment guide, a guide element for the protective hood (1) is at least partially mounted rolling or sliding as a metal or plastic part and / or a second guide (4 / 1) is provided for the protective cover (1) with a second guide element (6) which can be arranged in the second guide (4/1) and / or the coupling means (5) for example. B. as a train-pressure medium with a linear guide (10) or a part thereof and is guided with a certain radius on or in the guide (4) for the protective cover (1). Machining machine according to one or more of the preceding claims, characterized in that the application or attachment points of the coupling means (5) and / or a drive on the pivoting device (2) and the protective cover (1) are the same, such that an angle-equal pivoting movement is ensured by pivoting device (2) and protective cover (1) and / or on the linear guide (10) has a receiving groove, bore or the like for receiving at least a portion of the train as a pressure-pressure means formed coupling means (5) is provided. Processing machine according to one or more of the preceding claims, characterized in that for the connection of the coupling means (5) designed as tension-pressure means with the linear guide (10) a pin (13) is provided, which is movably mounted in a groove (14) and / or the coupling means (5) designed as a tension-pressure means comprises supports (5/1, 5/2), on which this on the frame (7) on the one hand and on the machine body (9) on the other hand with a sheath (5/3 ) and / or the train-pressure medium with the linear guide (10) on the one hand by means of the pin (13) and on the other hand with the pivoting device (2) of the saw unit by means of another pin (15) or an attachment point while maintaining the same attachment or Movement radius is connected. Processing machine according to one or more of the preceding claims, characterized in that the pins (13, 15) or the attachment points therefor at the same distance from the axis of rotation (A) or the support plane of the machine table (9/1) on the pivoting device ( 2) of the protective hood (1) are arranged and / or on or in the linear guide (10) a displaceable counterpart (12) is provided that preferably via a threaded spindle (11) is adjustable and / or the protective hood (1) on the Counterpart (12) is attached. Processing machine according to one or more of the preceding claims, characterized in that processing tools with a diameter greater than 315 mm can be used on the processing machine and / or the pivoting range for the processing tool (3). from 0 ° to 46 °, preferably on both sides starting from 0 °, is provided and / or the processing machine is designed as a woodworking machine. Processing machine according to one or more of the preceding claims, characterized in that the processing machine is a circular saw, preferably a sliding table saw and / or for the pivoting movement of the protective hood (1) an actuator is provided, which is connected to the drive of the pivoting device (2), in such a way that, in particular, a synchronous adjustment movement of pivoting device (2) and protective hood (1) takes place at the same angle and / or the actuator can be controlled by a controller, preferably the controller of the processing machine. Processing machine according to one or more of the preceding claims; characterized in that the actuator for the protective hood (1) is directly controllable and the values for the adjustment of an arranged on the pivoting device (2) angle encoder are given or the values that are fed from the control of the pivoting device and the actuator are supplied and / or the angular position of the swivel device (2) is determined by a mechanical, optical or electromechanical scanning device based on the position of the splitting wedge (8) and transmitted to the actuator for the protective hood (1) and / or the scanning device on the linear guide (10). is arranged.

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