DE202011101665U1 - Panel sizing saw with suction - Google Patents

Abstract

Panel sizing saw, comprising: - a workpiece support surface with a saw slot, - a saw unit that can be moved along the saw slot and below the workpiece support surface, with a circular saw blade which is rotatably mounted on the saw unit below the workpiece support surface and protrudes through the saw slot in a sawing frame, - one above the workpiece support surface arranged safety bridge with - a recess for receiving a saw blade circumferential section passing upwards through a workpiece resting on the workpiece support surface above the saw slot, and - a suction device for sucking off chips from the recess, characterized in that the recess in the horizontal direction transversely to the longitudinal direction of the saw slot is movable.

Description

The invention relates to a panel sizing, comprising a workpiece support surface with a Sägeschlitz, along the Sägeschlitzes and below the workpiece support surface movable saw unit with a circular saw blade which is rotatably mounted on the saw unit below the workpiece support surface and projects in a sawing through the Sägeschlitz, one above the workpiece support surface arranged safety bridge with a recess for receiving a by a resting on the workpiece support surface above the saw slot workpiece upwardly extending saw blade circumference portion, and a suction device for sucking chips from the recess.

Such panel sizing saws, which are also called sliding table saws or panel saws, are used to cut boards or hollow bodies of wood-based materials, light metals or plastics. Panel sizing saws of this construction are characterized by high precision and a high degree of automation, which makes them suitable for high-quality sawing work.

A sawing process by means of such a panel sizing is carried out here such that a workpiece is placed on the workpiece support surface, which may already be done in a defined position above the Sägeschlitzes by applying the workpiece to stop surfaces or stop flaps or by moving the workpiece from a previously by such attacks or Flaps referenced position by means of movable collets in a position above the kerf. The workpiece can then be firmly clamped by the clamping surface areas formed on the safety bridge and the saw unit can be moved along the distance over which a saw cut is made, whereby the axis of rotation of the saw blade is raised so that the saw blade with a peripheral portion over the workpiece support surface protrudes and so either incorporates either a complete cut or a groove in the workpiece.

For the production of this machining operation on the workpiece chips, it is known to suck these chips by means of a suction device, thereby a chip and dust pollution of the environment, which would be harmful to a user to prevent, and not the quality of the saw cut to impair. For this purpose, it is known to connect the suction device by means of a suction line with the recess between the two clamping surface areas and to suck the chips through this suction line.

A problem with such panel sizing saws is to achieve sufficient extraction of the chips from the recess. It is known to address this problem by increasing the suction power, but this leads on the one hand to increased noise pollution due to the required for effective extraction, significant air flow rates and pressure drop, on the other hand increases the energy consumption of the panel sizing due to such a powerful suction and thus reduces the Economics of the panel sizing saw. In addition, even a considerable increase in the suction power can not ensure the extraction reliably and completely for all dust and shavings produced under all operating conditions and for all material types to be processed.

The object of the invention is to provide a panel sizing saw which achieves a better suction effect than previously known panel sizing saws.

This object is achieved according to the invention in that the recess is movable transversely to the longitudinal direction of the kerf in the horizontal direction.

According to the inventor, the prior art has the disadvantage, in particular, that for the purpose of reliably receiving different circular saw blades, different circular saw blade arrangements and possibly different pivoting angles of the circular saw blade for performing miter cuts, the recess must be sized so that a sufficient suction effect is not obtained can be and thus shavings escape into the surrounding area of the recess or settle in certain areas of the recess. By the inventive measure, the recess in the horizontal direction transversely to the longitudinal direction of the kerf to design movable or to arrange, it is possible to adjust the position of the recess to a geometry, position or pivoting of the saw blade such that the recess to the saw blade in each case in optimal Way is positioned. This makes it possible according to the invention to make the recess substantially smaller in a horizontal direction perpendicular to the longitudinal direction of the kerf, since the saw blade can always be reliably received by movement of the recess even in such a small recess. By this narrow design of the recess, the suction effect can be significantly increased within the recess, without requiring an increase in the performance of the suction would be necessary.

The recess can be moved according to the invention in the horizontal direction transversely to the longitudinal direction of the kerf, in particular, alternatively, however, also pivoting or other curved trajectories are possible, as long as they have a component of movement transverse to the longitudinal direction of the kerf. It should be understood that a movement transverse to the longitudinal direction comprises, in particular, a movement perpendicular to the longitudinal direction of the kerf, but alternatively also movement directions which extend at an acute angle to this longitudinal direction.

According to the invention, the recess itself can be designed as a cavity integrated in the safety bridge, below the safety bridge or between boundary walls, lateral shielding devices or clamping elements, but alternatively it can also be designed as a cavity enclosed by a separate housing which is moved by movement of this housing ,

The safety bridge according to the invention may have clamping surfaces, wherein the safety bridge is characterized in that no over the entire cutting area reaching, closed clamping surface is present.

The movement of the recess can preferably be effected by one or more actuators, which are controlled by a control device, in order thereby to set an automated setting of a position of the recess which is suitable for the respective machine configuration, in particular the saw blade adjustment. Alternatively, the movement of the recess can also be done manually by an operator so as to set a suitable position of the recess.

According to a first preferred embodiment it is provided that on the safety bridge clamping surfaces which are vertically movable relative to the workpiece support surface, are arranged, wherein each clamping surface a first and a second clamping surface area extending in the direction of the longitudinal extent of the Sägeschlitzes, and a Spannflächenausnehmung between the the first and second clamping surface regions are designed to receive the saw blade peripheral section passing through a workpiece clamped by the first and second clamping surface regions, the clamping surface recess together with the recess and / or together with the first and / or second clamping surface regions, preferably the entire safety bridge in FIG horizontal direction transverse to the longitudinal direction of the kerf is movable.

In principle, it should be understood that the clamping surface recess, insofar as it is delimited by the two first and second clamping surface regions lying laterally thereof, can also be moved by a common movement of the first and second clamping surface regions in the horizontal direction transversely to the longitudinal direction of the kerf. In particular, it is preferred that the recess and the Spannflächenausnehmung is moved by a displacement, pivoting or a composite therefrom motion form of the entire safety bridge in this direction, whereby an overall advantageous, robust construction of the panel sizing and the safety bridge is achieved. The clamping surface areas or the entire safety bridge can be moved in particular by an actuator or a plurality of synchronously actuated actuators. For example, electric motor driven spindles or rack drives can be provided for this movement.

Still further, it is preferable to further develop the panel sizing saw by a miter pivoting device for pivoting the axis of rotation of the circular saw blade in a plane perpendicular to the extension of the kerf and by a control device provided with an actuator for horizontal movement of the recess, the clamping surface recess, the clamping surface regions and / or the safety bridge is signal-technically coupled and is designed to control the actuator for moving the safety bridge as a function of the pivoting angle of the rotary axis of the circular saw blade, so that the recess of the safety bridge receives the upwardly passing saw blade peripheral section at the respectively set miter angle.

With this training, an efficient extraction is achieved on panel sizing saw with circular saw units, which are designed for the production of Miter cuts. This design of panel sizing is characterized in that the circular saw blade can be pivoted by the axis of rotation of the circular saw blade is pivoted in a plane perpendicular to the extension of the kerf plane and thereby an inclination of the circular saw blade is achieved, which is suitable for the execution of miter cuts. The thus inclined saw blade thus extends inclined through the kerf up through and can be moved in this inclined orientation along the kerf to perform the cut. In order to achieve efficient extraction in such Miter cuts, according to the invention a recess can be used in a narrow design and these horizontally such be placed transversely to the kerf that the over Workpiece support surface protruding portion of the circular saw blade is received therein. In this case, according to this embodiment, the placement of the safety bridge or the recess by an actuator in an automatic manner carried out such that depending on the Verschwenkungswinkels the axis of rotation of the circular saw blade, the recess is arranged exactly so that the through the Sägeschlitz upwardly projecting part of the saw blade in the recess is received without coming into contact with the boundary walls of the recess or other parts of the construction. In particular, the pivoting of the axis of rotation can be effected by an actuator, which is controlled by the same control device, thereby achieving a fully automated adjustment of the miter angle and positioning of the recess or the safety bridge. In particular, pivoting of the circular saw blade in both directions out of the vertical position can be combined with effective extraction by means of the panel dividing saw designed in this way.

Still further, it is preferable that the suction device has a plurality of suction openings opening into the region of the recess, which are connected by means of a suction line to a vacuum source for removing chips and air from the recess to the vacuum source. By means of this embodiment with a plurality of suction openings, a suction concept is realized which, in particular in conjunction with the narrowly constructed recess, leads to an efficient extraction of chips without the need for large air velocities and air volume flows. In particular, as a result, the noise level of the suction device can be significantly reduced without the suction would have to be reduced.

The panel sizing saw of the construction described above or the above-described embodiment of the invention can be further developed that the suction means a plurality of spaced apart in the longitudinal direction of the safety bridge, opening into the recess suction, which are connected to the vacuum source for the removal of chips and air the recess to the vacuum source, and further comprising a control device which is adapted to receive a signal indicative of the position of the saw blade along the safety bridge and to cause a suction through a lying in the region of the position of the saw blade suction and suction through spaced from the position of the saw blade lying suction openings to prevent.

With this training, a specific embodiment of the suction device is proposed with a plurality of suction openings in the region of the recess, which on the one hand in combination with the above-mentioned movable recess as training, on the other hand also achieved as a stand-alone measure a significant improvement in the suction effect of panel sizing. In this case, according to this embodiment, this increase in the suction effect is achieved in that the air and chips from the recess is sucked off only in a limited area by one or a few suction openings, whereas other suction, which are not in this limited area, not used for suction become. The training sets the inventive idea to reduce the effective extracted volume range and exclude by control-technical position selection volume areas of the suction, which are not spanbelastastet.

The limited in this embodiment range includes in particular the respective position of the saw blade, that is, the suction air movement takes place only by suction, which are in the range of the respective position of the saw blade. In this way, the suction power can be concentrated on the area in which the chips actually arise and this area can be moved together with the saw blade, so that the optimized, maximum suction effect follows the saw blade, by each such suction for extraction are used in the area the position of the saw blade lie. For this purpose, the suction device comprises a plurality of suction openings, which can be acted upon individually with a negative pressure to achieve the suction or not. This individual admission can be realized by valves associated with the respective suction openings or by suction devices associated with the respective suction openings and which can be individually activated and activated. Furthermore, this embodiment can be realized by covering those suction through which no suction is to take place, for example by means of cover elements which are connected to the saw unit and cause in the area in front of and behind the saw unit, a cover of the suction.

According to a further development of the above-described panel sizing saw or the above-described embodiment of the panel sizing this can be further developed by a positive-pressure air device with at least one compressed air outlet opening, which supplies compressed air in the area around and / or in the recess and an air supply line, which the compressed air outlet ( en) connects to a positive pressure air source for supplying compressed air from the positive pressure air source to the recess. The proposed overpressure air device is both an effective training to further increase the suction on a panel saw of the construction described above, but can also be used as a single, independent measure to improve the suction opening of a panel saw according to the prior art.

By providing a positive-pressure air device according to the invention, air can be supplied under overpressure, that is to say with a pressure above ambient pressure, into the recess, thereby reinforcing and supporting the chip feed into the suction device. The overpressure air device may in particular be provided with one or more compressed air outlet openings which open into those regions of the recess from which chips are to be removed and supplied to a suction opening. The overpressure air source can be provided in particular as a ventilation system, which also includes the vacuum air source for the suction, so that by providing a single air conveyor on the one hand, a use of the vacuum side negative pressure of this air conveyor, on the other hand, a use of the positive pressure side overpressure of this system for efficient extraction is provided.

In this case, in one embodiment of the panel sizing saw with overpressure air device, it is further preferred that these be formed by a second shielding device arranged laterally on the safety bridge and extending along the safety bridge, preferably the first and second clamping surface regions and the recess in one region are arranged, which lies between the first and second shielding device, and characterized in that the compressed air outlet opening are formed on the first and / or the second shielding device. Such a shielding device can effectively limit the area from which it is aspirated in such a way that the extraction efficiency is further increased and at the same time accidental extraction of objects from the surrounding area of the security bridge is prevented. At the same time, such a shielding device can serve as a measure for increasing the working safety on such panel sizing saws by preventing a user from accidentally reaching his or her arm into the area of the sawing slot and thus being exposed to the danger of being injured by the saw blade or the clamping surface areas to become. The shielding device may also be provided as a boundary wall of the recess, so that this shielding device is moved together with the recess horizontally obliquely to the Sägeschlitzerstreckung to position the recess for receiving the saw blade. The arrangement of the compressed air outlet openings on the first and / or second shielding device, the area in which chips can come to rest and move in eddies, optimally detected by the compressed air and achieves optimal extraction support by the compressed air.

In this case, it is particularly preferred for the first and the second shielding device to extend horizontally along the safety bridge and vertically from a fastening region on the safety bridge in the direction of the workpiece support, and for the compressed air outlet opening (s) to be at the end of the first and / or second support facing the workpiece support Shielding device is / is arranged. In this embodiment, the first and second shielding shields the entire area of the safety bridge, in which the circular saw blade can move and in which the clamping effect is achieved by the clamping surface areas, effectively against accidental engagement of the user and provides a defined space, comprising the recess or can be consistent with this, forth, from which the chips are sucked. The arrangement of the compressed air outlet openings in the lower region of the shielding device, that is immediately adjacent to the workpiece support surface, when this shielding device is lowered, efficiently conveys the chips lying on the workpiece support surface to the suction openings.

Still further, it is preferred that the compressed air outlet opening (s) is arranged and aligned so that the air exits horizontally in the direction of the kerf from the compressed air outlet opening (s). Such a horizontal air outlet from the compressed air outlet openings, which is achieved in particular by a lying in a vertical plane opening cross section of the compressed air outlet openings, can achieve a further increase the efficiency of the suction efficiency by the lying in the recess and below the safety bridge chips from such a horizontal compressed air jet effectively detected and fed to the suction openings. Depending on the arrangement of the compressed air outlet openings and the flow conditions in the recess, the air outlet can also take place at any angle deviating from the horizontal.

Still further, it is preferred that the first and the second shielding device are formed by a plurality of fins, which are each arranged side by side along a horizontal extension direction and that preferably at the end pointing to the workpiece support surface a lamella the compressed air outlet opening (s) is arranged. By the execution of the first and second shielding device as a plurality of lamellae, it is possible to effectively shield the area below the safety bridge against the environment even if a workpiece that does not extend over the entire length of the kerf is located above the kerf , In this case, the plurality of sipes both a sealing pad of the shielding device on the workpiece as well as a sealing support of the shielding on the workpiece support surface in the areas that are not covered by the workpiece, and thereby an effective seal and consequently suction supported. In this case, it should be understood, in particular, that the lamellae are designed to be vertically displaceable individually and independently of one another in order to achieve this individual support on the workpiece in an elevated position or on the workpiece support surface in a lowered position for this purpose.

In this case, this embodiment can be further developed by each lamella having a communicating with the compressed air outlet opening of the lamella cavity, which is a part of the compressed air channel. In this further development form, the lamellae are designed for compressed air guidance by having a channel-like cavity through which the compressed air is conducted to the compressed air outlet opening.

It is even further preferred that in the cavity of one, in particular each lamella a fixedly connected to a safety bridge cross member guide element is arranged, on which the lamella is guided vertically displaceable and that preferably in the guide element connected to the positive pressure air source air duct is formed, the communicates with the lumen of the lamella. This embodiment makes it possible in particular to supply the compressed air effectively in the cavity in the slats and at the same time to use this cavity as storage for a vertical displaceability of the slats. At the same time the slats are pressed by the compressed air effect on the workpiece support surface or on the workpiece. Thus, for example, this embodiment may preferably be designed so that the cavity formed in the lamellae is designed as a bore into which a pipe attached to the safety bridge is inserted, which is in fluid communication with the compressed air source. The lamella is then passed through the inner wall of the bore on this tube. An anti-rotation of the blade can be provided either by a corresponding additional non-rotationally symmetrical guide element or can be done by guiding the adjacent lamellae in the region of the adjacent edges of two adjacent lamellae, for example by the lamellae each guided by tongue and groove joints and thus rotation secured are.

Still further, it is preferable that the positive-pressure air device has a plurality of compressed air outlet openings spaced apart in the longitudinal direction of the safety bridge, which are connected to the overpressure source, and further comprises a control device which is designed to signal the position of the saw blade along the safety bridge characteristic signal receive and to cause a compressed air supply by lying in the region of the position of the saw blade compressed air outlet opening and to prevent compressed air supply by spaced from the position of the saw blade compressed air outlet openings. This embodiment further supports the efficient extraction by the compressed air can be passed through a single or a plurality of compressed air outlet openings, which are each controlled depending on the position of the saw blade such that a maximum support of the suction is achieved by the compressed air supply. Thus, it can be provided in particular to supply the compressed air through compressed air outlet openings in the recess, which are located in front of and behind the respective current saw blade position, thereby to achieve a suction assisting air flow into the suction openings in the saw blade position. Alternatively or additionally, compressed air outlet openings, which are located in the region of the saw blade position, are supplied with compressed air, thereby preventing the deposition of sawdust in this area. It is to be understood in principle that this selective supply of compressed air can preferably be combined with the selective suction through specific suction openings depending on the position of the saw blade and then achieves a particularly effective extraction.

Still further, it is preferable that a positive pressure air passage and a negative pressure air passage are arranged on the safety bridge, both extending along the longitudinal direction of the channel and preferably both connected to a plurality of compressed air outlet openings or suction openings, which are arranged spaced apart in the longitudinal direction of the safety bridge , With this embodiment, a structurally simple and the effective extraction supportive structure of the safety bridge is proposed, which is designed both for positive pressure air flow and for negative pressure air flow. Overpressure and vacuum air duct preferably designed as an extruded profile.

The panel sizing saw according to the invention may preferably according to a method for Operated control of a panel sizing saw, comprising the steps of: clamping a workpiece by means of a safety bridge with clamping elements, which is arranged above a workpiece support surface and vertically movable relative to the workpiece support surface by a first clamping surface area extending in the direction of the longitudinal extent of the kerf and a second land area extending in the direction of the longitudinal extent of the kerf, and a recess between the first and second land areas for receiving a saw blade peripheral portion passing upwardly through the workpiece clamped by the first and second land areas are vertically lowered onto the workpiece, and methods a arranged below a workpiece support surface saw unit with a circular saw blade, which rotates on the saw unit below the workpiece support surface and in a Sawing protrudes through the kerf, along a kerf, wherein it is provided in particular that the axis of rotation of the circular blade in a plane perpendicular to the extension of the kerf plane security bridge for setting a miter angle is pivoted and the recess, preferably together with the first and second clamping surface area, is moved in particular together with the safety bridge horizontally and obliquely to the longitudinal extent of the kerf so that the recess of the safety bridge receives the upwardly passing saw blade peripheral portion at the respective set miter angle.

Furthermore, the panel dividing saw according to the invention can be operated by a method comprising the steps of detecting the position of the saw blade along the safety bridge and selectively sucking the chips produced during the saw cut from the region of the recess by means of a suction opening located in the region of the saw blade position or a group of Suction blade located portion of the suction openings of a plurality of spaced apart longitudinally of the safety bridge suction, to a source of negative pressure with air from the recess, and preventing the suction through spaced from the range of the saw blade position suction.

Finally, the panel dividing saw according to the invention can be operated by a method comprising the steps of: supplying compressed air from a positive pressure air source through a compressed air outlet opening in the region of the recess, wherein preferably the compressed air by compressed air outlet openings in a laterally arranged from the first clamping surface area first shielding and a arranged laterally from the second clamping surface area arranged second shielding device, the recess is supplied.

With regard to the advantages and specific embodiments of these previously described methods, reference is made to the corresponding embodiments of the panel-sizing saw according to the invention and the advantages and effects mentioned there.

A preferred embodiment of the invention will be described with reference to the accompanying figures. Show it:

1 a frontal, centrally broken view of a first embodiment of a safety bridge for a panel saw according to the invention,

2 one along the line HH in 1 cut side view of the embodiment according to 1 .

3 a detail according to the section 1 in 2 .

4 a plan view of the embodiment according to 1 with removed cover hood,

5 a detail G according to 4 .

6 a frontal view of the embodiment according to 1 with omitted cover,

7 a bottom view of the embodiment according to 1 with omitted cover,

8th a detailed perspective view of an alternative embodiment of a shielding device,

9 a detailed view according to the section J from 8th .

10 a second embodiment of a safety bridge for a panel sizing saw according to the invention in a representation of two different Hubsituationen,

11 a detail according to 7 the first embodiment,

12 a left side view of the embodiment according to 1 with omitted cover,

13 one along the BB line in 6 Sectioned side view of the embodiment according to 1 .

14 a detailed view according to the section E in 13 , and

15 one along the line CC in 6 Sectioned side view of the embodiment according to 1 .

16 a detailed view according to the section D in 15 .

17 a schematic view of the air duct in the safety bridge according to an alternative embodiment.

1 shows a frontal overall view of a security bridge 1 for a panel sizing saw according to the invention. The safety bridge 1 is by means of frontal supports 2 . 3 above a workpiece support surface 4 mounted by means of a respective quadruple fitting.

Below the workpiece support surface 4 is a sawing unit 5 linearly displaceable in one direction 5c stored. On the saw unit 5 is a main saw blade 5a and a scoring saw blade 5b rotatably mounted and the main saw blade 5a and the scoring saw blade 5b can be translationally displaced in the vertical direction to a peripheral portion of these two saw blades on the workpiece support surface 4 for making a cut on a workpiece which is on the workpiece support surface 4 is necessary to carry out. For this purpose, the saw unit 5 at rotating and over the workpiece support surface 4 protruding saw blades translationally along the direction 5c postponed.

The saw blades 5a , b protrude through a Sägeschlitz in the workpiece support surface 4 therethrough. The kerf extends in the direction of the linear feed movement 5c of the saw unit 5 ,

The safety bridge 1 includes two in greater detail in 2 and 12 and 13 shown linear drives 10 , which are designed as a servomotor. A first linear drive 10a is fixed to the frontal support 2 connected, a second linear drive 10b is fixed to the other frontal support 3 connected. The servomotors 10a , b serve to a recess 300 , which the projecting beyond the workpiece support surface peripheral portion of the circular saw blades 5a and 5b when performing a cut, in the horizontal direction and transverse to the direction of movement 5c to move. The servomotors 10a , b are synchronized for this purpose. The closer functioning of the servomotors 10a , b provided adjustment is based 12 for the in 1 The left - side configuration is explained and is in a constructively identical manner to that in 1 right side executed.

The servomotor 10a is on a gearbox 20a flanged, which is the rotational movement of the servomotor 10a stocky and on an adjusting spindle 30a transfers. The adjusting spindle 30a acts with a spindle nut 40a Together, on a carriage 50a is firmly mounted. The carriage 50a is by means of sliding shoes 55 displaceable on a linear guide 60 stored. Through this slidable, via the servomotor 10a Actuator-actuated bearing of the carriage 50a it is possible the recess 300 that with the carriage 50a is connected, in a horizontal direction perpendicular to the direction of movement 5c to move the saw carriage.

Referring again to 1 is on the carriage 50a a cover 51 mounted, which protects the structural components from environmental influences and prevents accidental engagement of the user in the moving parts of the safety bridge. This cover 51 is in all other figures except 1 and 2 omitted for a better understanding of the invention.

The carriages 50a , b are with frontal vertical struts 52 . 53 connected, in common with the carriages 50a , b horizontal and perpendicular to the direction of movement 5c are displaceable. On these vertical struts on the one hand, an upper support profile 180 attached, extending in the direction of the kerf from the vertical strut 52a to the vertical strut 52b extends.

This upper carrier profile 180 takes, as in more detail in the 13 and 14 it can be seen, guide elements 100 in which a plurality of vertically extending cylinder rods 101 vertically displaceable by sliding bushes 102 is stored. At the bottom of these cylinder rods 101 is a carrier profile 140 attached for a slatted curtain. This carrier profile 140 Can work together with the cylinder rods 101 be moved vertically, creating a slat curtain by a variety of slats 150 is formed, raised or lowered.

The carrier profile 140 is designed as a U-profile, the interior facing downwards in the direction of the kerf. On the two legs of this carrier profile 140 for the slat curtain are the slats 150 attached on both sides.

The slats 150 are arranged in a horizontal direction next to each other along the kerf and serve to shield the Sägeschlitz and the saw blades extending therein to the To avoid chip leakage and to prevent a user from accidentally reaching into this danger zone. All slats 150 can work together by raising or lowering the carrier profile 140 be raised or lowered. For this lifting or lowering a cable pulling device is provided which in more detail 6 is recognizable.

In the 6 A recognizable cable device for the slatted curtain comprises a pneumatic cylinder 120 , which has a rope rocker 121 four cables 110a -D pressed. The first cable 110a extends from the pneumatic cylinder 120 over the entire length of the upper side member 180 and is on the pneumatic cylinder 120 opposite end of this upper side member 180 by means of a on the longitudinal beam 105 mounted pulley 90a deflected and connected to the U-shaped carrier profile for the slatted curtain. The other cable 110b runs from the pneumatic cylinder 120 only over a short distance along the upper beam profile 180 , is then by means of a on the upper beam profile 180 mounted pulley 90b deflected and also connected to the U-shaped carrier profile for the slatted curtain. The cables 110c , d are analogous to this on the other side of the carrier profile 180 , By actuating the pneumatic cylinder 120 this can be the U-shaped carrier profile 140 of the lamellae curtain and together with this all lamellae 150 be raised and lowered.

Each lamella 150 is by means of two each in more detail in 1 recognizable guide pins 150a , b on the U-shaped carrier profile 140 fastened to the slatted curtain. The guide pins 150a , b are arranged vertically one above the other. Each lamella 150 has a longitudinal groove extending in the vertical direction 151 on, in which the two guide pins 150a , b are lost. On the outside, each guide pin points 150a , b a head on, the lamella 150 on the U-shaped carrier profile 140 attached. The longitudinal groove 151 extends over a length which is greater than the distance between the two guide pins 150a , b. This will allow each slat 150 individually from a lowered position in which the guide pins 150a , b at the upper end of this longitudinal groove 151 arranged to be raised by a certain amount. This individual vertical displacement of the slats 150 ensures that the area above the kerf is reliably sealed even if one or more workpieces protrude from the side into the area above the kerf and consequently the lower edges of the laminations facing the workpiece support surface 150 for the purpose of complete coverage and protection of the danger area must be at different heights, namely on the one hand on the upper surface of the workpiece, on the other hand on the workpiece support surface 4 ,

The pointing to the workpiece support surfaces ends of the slats are chamfered, rounded or chamfered, on the one hand a slight movement of the workpieces with lowered slat curtain 150 on the other hand, to enable injury-free extraction of limbs when the lamellae rest on such limbs. The individual displaceability of the lamellae prevents in such a case that the lamellar curtain causes injury-threatening forces to be exerted on the limbs.

In the 8th and 9 an alternative embodiment of the lamellae curtain is shown. This alternative embodiment is characterized in that the slatted curtain can additionally fulfill the function of a compressed air supply in the space above the kerf.

The in the 8th and 9 slats shown 550 are, as well as the previously explained slats 150 , arranged side by side in the longitudinal direction of the saw slot or of the U-shaped carrier profile for the slatted curtain. At the respective, juxtaposed edges of the slats is a tongue and groove connection 555 formed, which connects the slats form-fitting manner and thus connects to a self-contained wall to each other. This tongue and groove connection also causes a guide of two adjacent lamellae to each other and allows the individual vertical displacement of each lamella 550 opposite to their neighboring lamellae 550 ,

In the interior of each lamella is a blind hole extending from the upper end downwards 551 educated. This blind hole 551 extends to just before the lower end side of the lamella. A horizontal and inward to the saw slot facing hole 552 is with the blind hole 551 connected at the lower end.

In the blind holes 551 is a guide tube 553 guided. The guide tube 553 is at its upper end with a ledge 554 connected to the U-shaped upper beam profile 140 is attached for the slat curtain. In this bar a compressed air distribution line is arranged, which compressed air on each of the plurality of tubes 553 distributed. The pipes 553 lead this compressed air into the blind hole 551 continue, from which the compressed air in turn through the horizontal hole 552 can emerge inward in the direction of the kerf. The compressed air then causes after its exit a transport of chips in the area around the kerf and thus improves the suction effect. The Tube 553 can be acted upon at the same time as a whole with compressed air, alternatively, by compressed air supply by appropriate valves in the compressed air only on individual selected tubes 553 or groups of pipes 553 be supplied. This selective compressed air supply is such control technology coupled to a control device that, for example, only those slats are acted upon with compressed air, which are arranged in front of and behind the current position of the saw blade, thereby further improving the suction effect.

The upper carrier profile 180 continues to take a plurality of pneumatic cylinders 160 on, which serve as a clamping cylinder for clamping a workpiece. The pneumatic cylinders 160 are at irregular intervals next to each other along the top beam profile 180 arranged. They form, starting from the in the 1 such as 6 and 7 right end first a double group 160a , b, then a triple group 160c , d, e, followed by a single cylinder 160f , a triple group 160g -I, a single cylinder 160j , a double group 160k , l and another double group 160m , n.

The pneumatic cylinders 160a -N are inside the top beam profile 180 arranged and the cylinder rod of the pneumatic cylinder 160a -N extends downwards from this upper beam profile. Each side of this cylinder rod 161 are two guide rods 162 . 163 formed, by means of which the retraction and extension movement of the pneumatic cylinder 160a -N additionally guided and the cylinder rod 161 protected against bending forces.

The cylinder rod 161 and the two guide rods 162 . 163 are by means of an adapter plate 164 with a U-shaped clamping skid 170a -N coupled at its lower end. The U-shaped clamping skid comprises an upper cross-beam 171 and two lateral, away from this crossbar 171 down in the direction of the workpiece support surface 4 extending thighs 172 . 173 , The U-shaped clamping skids 170a -N are arranged within the space formed by the two-sided louver curtains and form a recess between them 300 out.

The lower ends 172a . 173a the lateral thigh 172 . 173 Each clamping skid form clamping surfaces, which serve to a workpiece on the workpiece support surface 4 to stretch. For this clamping process, the pneumatic cylinder 160a -N extended and pressurized until a sufficient clamping force is reached.

In the interior between the two side profiles 172 . 173 is above the recess 300 a lower carrier profile 190 arranged, extending from the front side fasteners 2 . 3 extends and serves to stiffen the entire safety bridge.

Every scoop 170a -N can be personalized by the respective associated pneumatic cylinder 160a -N lowered or raised. The pneumatic cylinders 160a -N can be controlled by a control unit, which is signal-technically coupled to a graphical user interface. By means of this graphical user interface, each pneumatic cylinder can be controlled individually by the user in order to carry out a clamping operation through this pneumatic cylinder.

In addition to this manual selection of the individual pneumatic cylinders 160a -N are also programmed in the control unit for the clamping process and automatic clamping operations with a corresponding automatic selection of selected pneumatic cylinders. This automatic selection is based, on the one hand, on a multiplicity of sensors which are arranged along the lower carrier profile and can detect the presence of a workpiece in the region of each clamping runner. Depending on the signal from this plurality of sensors, the control unit may then selectively select such pneumatic cylinders 160a -N drive, which operate a clamping run, in whose area a workpiece was detected. Furthermore, the control unit is provided with an interface via which a machining sequence program can be loaded. In this machining sequence program, starting from an initial size of a workpiece, several processing steps for a blank are stored. From these data, the respective size of the workpiece is stored before and after each cutting process and also the position at which the workpiece is positioned for the implementation of the next saw cut and is stretched. From this workflow program can then also be carried out in an automated manner, the clamping process via individually selected clamping runners.

The lateral thighs 172 . 173 are spaced from each other only so far that they have a recess 300 of a width between them which is sufficient to accommodate the circular saw blade in a miter of slightly more than 45 ° and a depth of cut corresponding to the maximum depth of cut of the panel sizing saw. This thus achieved minimum width of the recess 300 leads to an effective extraction of chips from the recess 300 because compared to the prior art, the recess is not provided in such a width, which is necessary for receiving the circular saw blade in a two-sided pivoting of slightly more than 45 ° would. The recess 300 can be horizontally displaced laterally transversely to the extension direction of the kerf by translational displacement of the upper and lower beam profile with the attached components of the slatted curtain and the clamping runners, thereby being brought into a position which allows the inclusion of the saw blade.

The extraction of chips from the area of the recess 300 takes place via a controlled local suction effect. For this purpose, on the one hand in a through the cover 51 generated cavity 55 generates a negative pressure. This negative pressure may optionally be applied to a plurality of suction slots arranged longitudinally along the upper support profile 180 are arranged.

The selective loading of these longitudinal slots on the upper carrier profile 180 is powered by two pneumatic cylinders 70a . 70b controlled, each with a slider 80a . 80b are mechanically coupled for the exhaust air duct. By shifting this slider 80a respectively. 80b by means of these pneumatic cylinders 70a . 70b Optionally, one or more suction slots can be opened or closed to thereby provide a local suction effect on the recess 300 to achieve. The control of the pneumatic cylinder 70a . 70b is performed by a control unit, which is signal-coupled in particular with a sensor that detects and transmits the position of the saw blade along the kerf. In this way, by targeted control of the pneumatic cylinder 70a . 70b each such suction slits are opened, which lie directly in the region above the respective position of the saw blade and consequently a targeted suction effect can be achieved.

Side of the lower beam profile 190 runs a light signal bar 210 which extends over the entire length of the kerf. In the light signal bar, a plurality of LEDs are arranged side by side, which can be activated individually. Here are alternately LEDs with any number of different colors, z. B. red, green, blue in the light bar 210 arranged. The light bar 210 is on the cover 51 attached.

The LEDs of the light bar 210 serve for different functions. On the one hand, a direct and effective illumination of the working area is achieved by this light bar, thereby facilitating the positioning and assessment of the workpieces to the user. For this purpose, a white light is summarily achieved by driving all the LEDs and causes a good illumination of the area above the kerf.

The light bar 210 is also connected to a control unit, which can also individually control the LEDs for signaling work processes and workflows. In a first function, the user can be shown the area in which a workpiece is to be placed above the kerf by activating individual LEDs. This can be done, for example, by illuminating the respective end-side LEDs of the intended workpiece support area or by lighting all the LEDs, which are above the area in which the workpiece is to be placed. This function of the position display can be done in particular by controlling the green LEDs, thereby achieving not only the position effect but also a function signaling.

The LEDs may be used in a third functionality to indicate to the user in which areas a clamping operation of the workpieces is or will occur. For this purpose, for example, the blue LEDs in the respective areas around a Spannkufe, which is activated or should be activated, light up. In this case, it is further possible to differentiate between an upcoming and an executed clamping operation by correspondingly different colorations, for example by activating the green LEDs in addition to the blue LEDs when the clamping operation indicated by the blue LEDs is actually carried out and the workpiece is tensioned.

in a further, fourth functionality, the light bar can be used to display the position of the saw unit, in particular the position of the main saw blade and / or the scoring saw blade to the user. For the purpose of signaling the danger, in particular the red LEDs in the respective area in which the saw blade (s) are located can be activated for this functionality. In this case, in the process of the saw blade by follow-up activation of the LEDs, a running light can be generated in order to thereby effectively indicate to the user the active sawing process. It should be understood that the position of the saw blade or the saw blades is displayed in particular only when the saw blades protrude beyond the workpiece support surface, thereby achieving an actual hazard warning.

10 shows a second embodiment of the security bridge according to the invention. This second embodiment is characterized in that the entire unit is mounted vertically displaceable on the workpiece support surface from a lower carrier profile and the structural elements attached thereto by a much greater distance. In 10 is shown a lowered position in which the slats of the slat curtain 1150a on the workpiece support surface 1004 rest. In this lowest position in particular plate materials can be processed and sawn.

In 10 is schematically a second position of the slatted curtain 1150b shown, which represents a maximum position for this purpose. It should be understood that the sipe curtain 1150a and 1150b basically represents the same component and can occupy only one of these two positions. In 10 is to clarify the additional function of this slat curtain in two different positions 1150a and 1150b shown.

In order to achieve the vertical displaceability by the amount a, in the embodiment according to FIG 10 each end a spindle drive 1001 . 1002 mounted, which serves to side profiles 1052a . 1052b vertically to raise the maximum amount a from the position in which rest the slats of the slat protection curtain on the workpiece support surface.

In addition to the stroke a thus provided, the slats can themselves be lifted by the stroke b and thus allow a workpiece, in particular a hollow body, to be clamped between the slats or clamping runners and the workpiece support surface, which assumes a maximum height of a + b and such a workpiece is then sawn by means of the panel sizing saw.

Out 17 an alternative embodiment of the lower beam profile is apparent, which is particularly suitable for an embodiment of the safety bridge according to the invention, in addition to an extraction of chips and a compressed air supply by means of in the 8th and 9 shown specific embodiment of the slatted curtain provides. As can be seen, in this, in 17 shown embodiment in the lower carrier profile on the one hand a suction chamber 2001 provided, which is connected to a vacuum air source and is designed for the extraction of chips via each individually opened suction slots.

Above this suction chamber 2001 is a supply air chamber 2002 provided, which is connected to a positive pressure air source. In the supply air chamber there is an overpressure relative to the environment. The in the supply air chamber 2002 Located compressed air can be via horizontal inlet ducts, which in a fixing strip 2554 are formed in a variety of compressed air line pipes 2553 enter, extending vertically from the mounting bar 2554 extend in the direction of the workpiece support surface. From these compressed air pipes 2553 The compressed air can turn into a blind hole in each case a lamella 2550 enter and this at the lower end, adjacent to the workpiece support surface by a horizontal bore 2552 left inside.

By this type of compressed air guide, an air flow in the region of the recess 2300 which achieves effective extraction of chips.

At the safety bridge a control panel is further arranged, which is linearly displaceable on a linear guide by means of a Panelaktuators along the safety bridge. The control panel has a touch-sensitive screen and also separately arranged manual control units, such as an emergency stop button.

By means of digital cameras arranged at the respective ends of the safety bridge, the position of an operator is determined by an image evaluation unit and transmitted to a panel control unit. The panel control unit controls the panel actuator such that the control panel is moved to an optimum position for the user to easily operate and view the control panel. At the same time, a virtual perspective view of the workpiece support surface is generated from the perspective of the user position of the panel control unit, which includes the resting on the workpiece support surface workpieces in their desired position. This perspective view is displayed on the screen of the control panel.

Claims (14)

A panel saw, comprising: - a workpiece support surface with a saw slot, - a saw unit movable along the saw slot and below the workpiece support surface with a circular saw blade which is rotatably mounted on the saw unit below the workpiece support surface and projects through the saw slot in a sawing position, - one above the workpiece support surface arranged safety bridge with - a recess for receiving a by a resting on the workpiece support surface above the kerf workpiece upwardly passing saw blade circumference, and - a suction device for sucking chips from the recess, characterized in that the recess in the horizontal direction transverse to the longitudinal direction of the kerf is mobile. Panel sizing saw according to claim 1, characterized by arranged on the safety bridge clamping surfaces, the vertically movable are relative to the workpiece support surface, each clamping surface having first and second clamping surface regions extending in the direction of longitudinal extension of the kerf, a clamping surface recess passing between the first and second clamping surface regions for receiving the workpiece clamped by the first and second clamping surface regions Saw blade circumference portion, and characterized in that the Spannflächenausnehmung is movable together with the recess and / or together with the first and / or second clamping surface area, preferably the entire safety bridge in the horizontal direction transverse to the longitudinal direction of the kerf. Panel dividing saw according to claim 1 or 2, characterized by a Gehrungsverschwenkeinrichtung for pivoting the axis of rotation of the circular saw blade in a plane perpendicular to the extension of the kerf and by a control device which with an actuator for horizontal movement of the recess, the Spannflächenausnehmung, the clamping surface areas and / or Safety bridge is signal-coupled and is designed to control the actuator for moving the safety bridge in dependence on the pivoting angle of the axis of rotation of the circular saw blade, so that the recess and gfs. the Spannflächenausnehmung the safety bridge receives the upwardly passing saw blade peripheral portion at the respective set miter angle. Panel dividing saw according to one of the preceding claims, characterized in that the suction device has several opening into the region of the recess suction, which are connected by means of a suction with a vacuum source for the removal of chips and air from the recess to the vacuum source. Panel sizing saw according to one of the preceding claims or the preamble of claim 1, characterized in that the suction device - A plurality of spaced apart in the longitudinal direction of the safety bridge, opening into the recess suction, which are connected to the vacuum source for the removal of chips and air from the recess to the vacuum source, and - A control device which is adapted to receive a signal indicative of the position of the saw blade along the safety bridge and to cause a suction through a lying in the region of the position of the saw blade suction and suction around a spaced from the position of the saw blade suction to prevent having. Panel sizing saw according to one of the preceding claims or the preamble of claim 1, characterized by an overpressure air device with at least one compressed air outlet opening which supplies compressed air in the area around and / or in the recess and an air supply line which connects the compressed air outlet opening (s) with a positive pressure air source for supplying compressed air from the positive pressure air source to the recess. Panel dividing saw according to the preceding claim 6, characterized by a laterally arranged on the safety bridge first and opposite thereto second shielding device, which extend along the safety bridge, wherein preferably the first and second clamping surface area and the recess are arranged in a region which is between the first and second shielding device, and characterized in that the compressed air outlet opening are formed on the first and / or the second shielding device. Panel sizing saw according to claim 7, characterized in that the first and the second shielding device extending horizontally along the safety bridge and vertically from a mounting area on the safety bridge in the direction of the workpiece support and the compressed air outlet opening (s) at the workpiece support facing end of the first and / or the second shielding device is / are arranged. Panel sizing saw according to claim 6, 7 or 8, characterized in that the compressed air outlet opening (s) is arranged and aligned / are such that the air exits horizontally in the direction of the kerf from the compressed air outlet opening (s). Panel dividing saw according to one of the preceding claims 7 to 9, characterized in that the first and the second shielding device are formed by a plurality of fins, which are each arranged along a horizontal extension direction side by side and that preferably at the workpiece support surface facing end of a blade, the compressed air outlet opening (en) is arranged. Panel sizing saw according to claim 10, characterized in that each lamella has a cavity in communication with the compressed air outlet opening of the lamella, which constitutes a part of the compressed air channel. Panel dividing saw according to claim 11, characterized in that in the cavity of one, in particular each lamella a fixedly connected to a safety bridge cross member guide member is arranged, on which the lamella is guided vertically displaceable and that preferably in the guide element is formed connected to the positive pressure air source air duct, which is in communication with the cavity of the lamella. Panel sizing saw according to one of the preceding claims 6 to 12, characterized in that the positive-pressure air device - A plurality of spaced apart in the longitudinal direction of the safety bridge compressed air outlet openings, which are connected to the pressure source, and - A control device which is adapted to receive a signal indicative of the position of the saw blade along the safety bridge and to cause a compressed air supply by lying in the region of the position of the saw blade compressed air outlet opening and a compressed air supply by spaced from the position of the saw blade compressed air outlet openings to prevent Panel dividing saw according to one of the preceding claims, characterized in that on the safety bridge a positive pressure air duct and a vacuum air duct is arranged, both extending along the longitudinal direction of the channel and preferably both are connected to a plurality of compressed air outlet openings or suction, in the longitudinal direction of the security bridge are arranged spaced from each other.

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