DE2721918A1 - Trimming saw for wooden batten ends - has saw discs and stops on slides on common controlled frame - Google Patents

Abstract

The power-driven saw disc is used on a woodworking machine to cut off the leading and rear ends of battens glued to the sides of planks or other flat workpieces. The saw is mounted across the workpiece direction of travel to swing in and out. For cutting off each batten end there is a stop element (41) and saw disc (5) on a common sliding carriage (6). This moves firstly horizontally across the line of the workpiece (3), and secondly at an angle to this. The two sliding carriages are separately mounted in tandem on a common frame (7) detachably joined to the woodworking machine (2), and controlled by a slide (8) connected to this.

Description

Impact saw device with driven saw disk

for a woodworking machine.

The subject matter of the invention relates to a stop saw device with driven saw disk for a woodworking machine for sawing off the front and rear ends of strips od. Like. That with the side edges of flat Workpieces, such as boards, are glued, with the stop sag device transversely can be swiveled in and out in front of the workpiece to be processed in relation to the direction of travel is arranged.

Stop devices on woodworking machines with a separate cutting disc, such as circular saw or the like, for sawing or milling protruding strip ends Board-shaped workpieces are well known. In the known devices However, it must be exemplary for cutting od. Also milling of protruding Ends of different widths of the stop in a time-consuming manner each on the desired width can be set by hand. The new manual input and Determining the stop and turning the workpiece to be machined to The purpose of separating the front and rear overhang is for the continuous process working woodworking machines not suitable.

In the case of machines working in a continuous process, where the to machined workpiece with constant speed by means of a separate Feed device passes the processing point, it is no longer new, parallel mounted or slidable vertically in the machining path to the cutting tool Provide stop lamellae that can be swiveled in and out when the workpiece is pushed in be lifted or lowered into the transport track and automatically by their own weight or. Spring force return to its rest position as soon as the workpiece has this Stop lamella has passed. These known stop devices on in a continuous process working woodworking machines are not for cutting to length and face cutting protruding, strip ends glued to the edges of flat workpieces, Veneers or the like are suitable, but are mainly used for boards that are trimmed or should be cut into strips.

The German utility model 7 115 330 also includes a saw unit, in particular for trimming veneer edges on continuously moving workpieces, wherein the saw unit has at least one motor-driven cutting unit, those for the cutting process of the workpiece via a attached to the cutting unit, Stop reaching into the path of movement of the workpiece in the workpiece transport direction is movable with and at the same time displaceable in the cutting direction. The stop is with connected to one end of a double-armed lever, the other end of which is connected a stationary stop is supported and which is arranged pivotably on the cutting unit is.

Another trimming device for veneer edges is the Dl-PS 1 703 446 became known, in which the saw unit is suspended so that it can swing and with its cutting surfaces aligned stop surfaces, which one after the other at the front or rear edge of the straight line continuous moved Workpiece come to the plant. The stop on the saw unit is adjustable between two Limiting elements movably attached. Furthermore, there is a pressure or lug device provided that on the stop against the thrust direction of the to be machined Workpiece acts and brings the stop into an end position.

The aforementioned devices are very complex and by the Many of the required individual elements are not particularly reliable. In addition Processing machines equipped with such devices are not for everyone Throughput speed of the workpiece to be machined.

Knowing these shortcomings, the inventor set himself the task of a stop device for a woodworking machine for sawing off protruding parts To create ends on a workpiece, in which also at different throughput speeds and largely independent of the thickness and the protruding length of the with the to be processed workpiece glued strip material a clean and flat # front and rear separation cut can be achieved in one pass.

Based on a stop saw device with a driven saw disk for a woodworking machine for sawing off the front and rear protruding parts Ends of strips or the like. Which with the side edges of flat workpieces, such as Boards, are glued, with the stop saw device transverse to the direction of travel of the workpiece to be machined in front of the same arranged so that it can be swiveled in and out is, the object is achieved according to the invention in that for separation the front and rear ends of the strips each have a stop element and a saw disc each on a common slide, which on the one hand transversely to the direction of the to machined workpiece and on the other hand at an angle in the direction of the Workpiece is displaceable, is arranged, with both carriages one behind the other on a common frame that is detachably connected to the woodworking machine supported separately and by an associated slide control device connected to the Gestill are controlled.

Advantageously, in the device, the frame for the two Slide horizontal and at an angle less than 900 to the direction of travel of the Guide rails arranged on the workpiece for the movable support of the slide on.

According to a further feature of the invention, each has a carriage two guide rails each for the horizontal and diagonal vertical direction of movement of round or flat cross-section. The one provided for moving the slide Slide control device is hydraulic, pneumatic or.

Like. Working trained.

In a further development of the invention, the stop element is in the form of a flexible, endless, revolving belt, which over rollers, arranged on a square or triangular carrier plate is stretched on the slide, designed. That endless, revolving belt as a stop element is either designed to run freely od. Driven by a separate drive device, such as an electric motor or the like and as flat or.

V-belt formed.

An endless belt is advantageously chosen for the device, which is flat and adhesive on the outside and smooth on the inside with / without transverse grooves, whereby the saw disc with its front side in alignment with the band serving as a stop element is aligned.

Finally, it should be mentioned that the slide control device to move the two carriages by the feed speed of the one to be processed Workpiece it is synchronized.

The following description serves to explain the invention Object of which an embodiment is shown in the drawing. Show it: 1 shows a side view of a stop saw device in the starting position; FIG. 2 shows the stop saw device according to FIG. 1 in the working position; FIG. Fig. 3 a Front view of the stop saw device according to the invention; Fig. 4 the stop saw device according to FIGS. 1 and 2 in the final working position.

The illustrated in Figs. 1 to 4 stop # ägevorrich device for a woodworking machine is denoted by 1 and as a separate add-on unit releasably connected to the woodworking machine 2. The workpiece to be machined 3, e.g. 8.

Board, the protruding bar ends 31 or the like. Are separated should, moves at constant speed on the left-hand side, not shown in detail adjustable, stop-limited transport track in the woodworking machine 2 in the direction of arrow P. Along this transport path are to separate the front and rear strip ends 31 each have a stop element 41 in the form of a flexible, endless and moving belt provided. Every stop element # 41 is stretched over rollers 42, arranged on a triangular carrier plate 4.

Each flexible band as a stop element 41 together with the carrier plate 4 is together with an electric motor-driven saw disk 5, such as a circular saw od. Saw pinion, on a common slide 6, which on the one hand is horizontal (Ptl P1) and transversely to the running direction of the workpiece 3 to be machined and on the other hand at an angle (oC) less than 900 in the direction (P) of the Workpiece 3 is displaceable (arrow P2) is arranged. Both carriages 6 are one behind the other housed in a common frame 7, the frame 7 for the two Slide 6 horizontally and at the angle ck to the direction of travel of the workpiece j arranged guide rails 7¹ and 7² of round cross-section for slidable Has holder of the carriage 6. The slide movement is controlled by a slide control device 8 connected to the frame as a function of csr Throughput speed of the workpiece to be machined 3. The slide control device 8 works in synchronism with the feed speed of the workpiece 3 and causes a slide movement on hydraulic, pneumatiechem od. Like. Ways.

As FIG. 3 illustrates, the one seen in the direction of advance is used first carriage 6 with the stop element 41 and the saw disk 5 for sawing off the front and the carriage behind with the corresponding units for Sawing off the rear strip protrusion 31. Of the stop element 41 with the associated Saw disk 5 of one slide 6 is opposite these elements of the other Carriage 6 rotated accordingly by 1800, each saw disk 5 with its end face is arranged in alignment with the band serving as a stop element 41.

The operation of the device according to the invention is as follows: The board-shaped workpiece 3 to be processed moves at a constant feed rate on the transport path of the woodworking machine 2. The fence saw device 1 is in the drop position shown in FIG. Immediately before reaching the trimming device responsible for the front ledge overhang becomes this Trimming device associated carriage 6 horizontally and transversely to the direction of travel Moved workpiece and brought into the working position shown in FIG. At this Slide position meets the front edge of the workpiece on the band-shaped stop element 41 of the irägerplatte 4, while the protruding and detachable strip end 31 arrives in front of the saw disc. The horizontal movement of the carriage 6 is controlled in such a way that that the strip end J is cut off flush with the workpiece edge.

When the front edge of the workpiece hits the endless, flexible one Belt with the one behind it, perpendicular to the direction of advance of the work piece 3 arranged side edge of the triangular support plate 4 is the carriage 6 under the aforementioned angle dC shifted in the direction of travel of the workpiece. During this Downward movement separates the saw disc 5 the front ledge overhang away. The band-shaped stop element 41 is mounted freely on the carrier plate 4 and is set in rotation by the steady forward movement of the workpiece. This running of the endless belt has an advantageous effect in terms of a small amount Frictional effect on the stop element 41. Depending on the case or thickness of the material to be processed Workpiece 3 can be the stop element as a wedge. Be formed flat belt. On the outside, the sand is flat and adhesive to achieve good adhesion the workpiece formed. The one pointing inwards, guided over the rollers 4Z The side, on the other hand, is smooth when the belt is running freely and can be provided with cross-grooves are, if the stop element 41 via a separate drive device, such as Electric motor od. The like., Is set in rotation, which then the obliquely vertical Shift speed must be adjusted.

After cutting off the protruding front end of the bar, it stands the carriage 6 in the final working position shown by FIG. 4, from which the Carriage 6 is then transferred into the rest position according to FIG. 1 immediately thereafter. Corresponding the aforementioned is also sawing off the rear end of the strip 31, only with the one difference that the carrier plate 4 with the tensioned over it, endless Band as a stop element seen in the feed direction of the workpiece when sawing behind, instead of in front of the workpiece, but with mutual contact.

It goes without saying that the invention does not apply to the exemplary embodiment shown here is limited. Further embodiments are of course within the scope of the invention conceivable and possible. For example, for each slide for the horizontal and inclined vertical displacement direction instead of two guide rails from each round cross-section, only one or more than two guide rails, e.g. also with flat Cross section, be provided.

The advantages achieved by the invention are in particular therein see that by the both horizontal and oblique vertical displacement of the Stop element during machining an absolute accuracy and clean cut is achieved. The movement has a supportive effect the moving, flexible belt as a stop element as well as during the downward movement of the saw device when flush cutting from the slide weight. Likewise it is conceivable that the carrier plate for the endless, free-running belt is rectangular, square, trapezoidal or the like. Blank page i t e

Claims (11)

Patent claims @ Stop saw device with driven saw disk for a woodworking machine for sawing off the front and rear protruding parts Ends of strips or the like. Which with the side edges of flat workpieces, such as Boards, are glued, with the stop-Sägevorrichs device transverse to the direction of travel of the workpiece to be machined in front of the same arranged so that it can be swiveled in and out is, d u r g e k e n n n z e i n e t, that for the separation of the front as also rear strip ends (31) each have a stop element (41) and a saw disk (5) each on a common slide (6), which is horizontal and transverse to the one hand Direction of travel of the workpiece to be machined (3) and on the other hand at an angle (~ ru) is displaceable in the running direction of the workpiece (j), is arranged, wherein both carriages (6) one behind the other on a common with the woodworking machine (2) releasably connected frame (7) held separately and by an assigned, are controlled with the order (7) connected slide control device (8). 2) stop saw device according to claim 1, d a d u r c h g e k e n n z e i c h n et, deß the frame (7) for the two carriages (6) horizontally and winter a wink '( less than 900 to the direction of travel of the workpiece (j) arranged guide rails ## 1, 72) for the slidable mounting of the carriages having. ) Stop saw device according to claims 1 and 2, d a d u r c h g e k e n n n z e i c fl n e t that each slide (6) for the horizontal and obliquely vertical displacement direction two guide rails (71, 72) of round od. Has a flat cross-section. 4) stop saw device according to claims 1 to 3, d a d u r c h g e k e n n n n e i c h n e t that the slide control device (8) is hydraulic, Pneumatic od. Like. Working is formed. 5) Snschlag-bägevorrichtung according to claims 1 to 4, d a d u notify that the catch element is in the form of a flexible, endless, revolving belt, which is arranged on rollers (42) on a square od. Triangular Irägerplatte (4) on the carriage (6) is stretched, is designed. 6) stop saw device according to claims 1 to 5, d a d u r c h g e k e k e n n n n n e i n e t that the endless, moving hand as a stop element (41) is designed to run freely. 7) stop saw device according to claims 1 to 6, d a d u r c h e k e k e n n n n n n e t, that the endless, moving belt is replaced by a separate one Drive device (51), such as an electric motor or the like. Is driven. B) stop saw device according to claims 1 to 7, d a d u r c h e k e k e n n n n e i n e t that the endless belt as a flat or V-belt is trained. #) Stop-Sage device according to claims 1 to 8, d a d u r It is noted that the hand is flat and adhesive on the outside and smooth on the inside is formed with / without transverse grooves. 1 (3) Ansclllag saw device according to claims 1 to 9, d a d u r c h e k e n n n z e i c h n e t that the saw disc (5) with its end face is aligned with the band serving as a stop element (41). 11) stop saw device according to claims 1 to 10, d a d u r c h g e k e n n n z e i c h n e t that the slide control device (8) for Moving the two carriages (6) by the feed speed of the one to be processed Workpiece (3) is synchronized.