The invention relates to a under-counter miter saw with one at the bottom
a rotary rotary table arranged sawing unit, the saw blade
liftable by means of a lifting drive and through a slot
the round table feasible upwards
are undercounter miter saws
This type of known (miter circular saws type SKL 350 of the
Hans Kaltenbach Maschinenfabrik KG, Lörrach), in which parallel guides below
of the rotary table, the saw unit
guided vertically displaceable
is, so that's it
upon actuation of a
from the rest position, in which the saw blade
located below the rotary table, in an operating position
is movable above, by the saw blade over the
Round table protrudes. In such designs, there is a risk of
Contamination of the vertical guide columns
falling sawdust, through
or by dust. The leadership
therefore requires a relatively expensive cleaning from time to time,
if the function does not affect
shall be. In addition, that one
vertical guides, in particular
if it also controls the immersion of the saw blade in the workpiece
should not always be possible without jerking, if possible
exact saw blade guide is desired.
are also controllable by hydraulic or pneumatic drives
in which a arranged below the rotary table pivot arm
carrying the saw blade, the
can be swiveled directly upwards by the drive.
Such types in turn allow the drive via a hand lever, as he at
many miter saws
is not, too.
The German patent DE 37 23 215
shows a circular saw, in which the saw unit is arranged on a directly below the rotatable table top and arranged transversely to the axis of rotation of the table top adjustable and definable carriage. In this way, an adjustment of a fixed stop for the material to be processed can be avoided. A feed movement of the saw blade is effected by means of a working cylinder.
From the German utility model DE 19 71 263 U1
a circular saw is known in which a saw unit is arranged vertically displaceable on a plurality of vertical guides below a saw table. A feed movement of the saw unit through the saw table is effected by means of a pedal mechanism. The pedal mechanism is designed so that the clamped workpiece on the saw table can not be released by a clamping jaw, as long as the blade is still above the table top.
The invention is therefore based on the object, a table miter saw of the aforementioned
To design art in such a way that a
jerk-free delivery of the saw blade
also possible with a hand lever
is, taking the lead
Saw blade like that
should be designed that a
exact, play-free as possible
without the risk of pollution can be achieved.
This object is achieved in a table miter saw of the type mentioned
provided that the
Swivel arm hinged directly to the underside of the rotary table
is and with one at a concentric to the axis of rotation of the rotary table
up and down movable carriage is engaged on the one as a lifting drive
trained hand lever with a concentric to the axis of rotation of
Round table arranged and rotatably mounted on the carriage sleeve on
this embodiment is used as an adjustment guide for the saw blade a pivot axis,
which can also be mounted in an area on the rotary table, where
the chip accumulation
is. Such a pivot axis can also be
train against pollution. The pivoting movement itself is through
the embodiment of the invention
Triggered by a vertically movable carriage, which is controlled by a hand lever
up and down and it does not matter that he is the exact
of the saw blade
guided free of play
is. Because the saw blade
guided by the pivot axis
it, when the vertically displaceable carriage in the vertical direction
is so that he,
a pin / slotted guide
the swivel arm with the saw blade
lead up or down
can. This embodiment also has the advantage that the from
Slide on the swivel arm exercised adjusting always in
the same trajectory acts on the swivel arm, so that a quiet
and even and
not of forces
influenced in other directions
Swinging up the saw blade
becomes. Since a lever is provided as a lifting drive, with
a concentric with the axis of rotation of the rotary table arranged and
rotatably mounted on the carriage sleeve to the height adjustment
attacks, the direction of movement of the hand lever always remains
same, even if the rotary table is twisted. Such a pivoting movement
The round table is picked up by the sleeve and influences the situation
the hand lever not.
In a further development of the invention, the sleeve is connected via a horizontally extending crossbar with a guide sleeve, in which the one side on Housing the saw mounted hand lever is guided.
Particularly advantageously, there is provided for the carriage
from two parallel columns,
attached with its upper end to the bottom of the round table
and held at the other end in a turntable, the am
Bottom of the case
is stored. This column guide will
Therefore mitverschwenkt at a pivoting of the rotary table. pivoted with
Although this is also the sled, but concentric to
Pivoting axis of the rotary table is arranged so that the
He also concentrically attacking and with the hand lever in connection
standing sleeve despite the pivoting of the rotary table in her
Location to the saw housing always
stays the same.
Further development of this embodiment, the carriage on the two
slidably held and with one in a perpendicular to the axes of the
be provided standing plane circumferential groove, in which the as
Collar formed sleeve engages the end of the crossbar
Crossbar can finally
at the end facing away from the collar with a guide fork
be provided, which engages around a vertical guide column, the housing side
is assigned, on which the lever is mounted. This embodiment has
the advantage that the
Crossbar is guided vertically at both ends, so that - together
with the carriage and arranged on the swivel arm saw blade - at a
Movement of the hand lever upwards a perfect vertical guidance of the carriage
and thus also the saw blade
Invention is based on an embodiment
shown in the drawing and will be explained below. It
1 a perspective view of an undercut miter saw according to the invention with a rotatably mounted in a saw housing round table,
2 the cut through the miter saw the 1 in a parallel to the side walls and approximately centrally through the housing extending representation,
3 the view of the saw housing the 2 in the direction of arrow 3, but with the front wall removed,
4 a horizontal section through the housing of the saw after the 1 to 3 in the direction of the section lines IV-IV of 5 .
5 the cross-section through the saw housing of the under-counter miter saw 1 along the line VV in 4 .
6 the appearance of a cut similar 2 but in a further variant,
7 the enlarged view of the adjustment guide for the hand lever of the embodiment of 6 , and
8th the enlarged and schematic representation of the section along the line IX-IX in 7 ,
In the 1 to 5 an undercounter miter saw is shown in which in a rectangular housing ( 1 ) a recessed in the top rotatable rotary table ( 2 ) provided with a diagonally through its axis of rotation ( 3 ) extending slot ( 4 ) is provided.
Below the round table ( 2 ) is at this with the help of two tabs ( 5 ) a pivot bearing ( 6 ), at whose pivot pin a swivel arm ( 7 ) is stored at the free end of the storage ( 10 ) for a saw blade ( 8th ) and at the other end with the drive motor ( 9 ) for the saw blade ( 8th ) is provided. The drive of the saw blade takes place via belt drives, not shown, in the interior of the swivel arm ( 7 ) are laid. By pivoting the swivel arm ( 7 ) from in the 2 pulled position shown in the counterclockwise direction in the dot-dash line position, the saw blade arrives from its position below the rotary table ( 2 ) through the slot ( 4 ) ( 8th' ) to 2 in which the cut can be made.
The drive motor reaches its position ( 9 ' ) within the housing ( 1 ).
The swivel arm ( 7 ) is how the 5 shows, with a laterally projecting pin ( 11 ), with which he forms a schematic in 2 slot shown ( 12 ), which in turn is part of a sled ( 13 ), which is attached to two mutually parallel and vertically extending columns ( 14 ), with their upper end fixed in a guide ( 15 ) of the rotary table ( 2 ) and with its lower end in a turntable ( 16 ) which are rotatable in the ground ( 1a ) of the housing ( 1 ) is guided. The turntable ( 16 ) is concentric with the axis ( 3 ), around which the rotary table ( 2 ) turns. The two columns ( 14 ) are therefore at a rotation of the rotary table ( 2 ) concentric with the axis of rotation ( 3 ) of the rotary table ( 2 ) mitverschwenkt.
The sled ( 13 ) has in its lower part a cylindrical extension ( 17 ) with a concentric to the axis ( 3 ) circumferential groove ( 18 ), in which, in the manner of a connecting rod, a collar ( 19 ) formed sleeve of a crossbar ( 20 ) is guided pivotably, which in turn extends to one side of the housing and with a guide bush ( 21 ) in a longitudinal slot ( 22 ) of a hand lever ( 23 ), the front of a slot ( 24 ) of the housing ( 1 ) with a handle ( 25 protrudes) and at the other end by means of two tabs ( 26 ) and a bolt ( 27 ) pivotable on the housing ( 1 ) is stored. The crossbar ( 20 ) is over the rifle ( 21 ) through a bolt ( 28 ) with a fork ( 29 ), in turn, a vertically oriented guide column ( 30 ), firmly on the ground ( 1a ) of the housing ( 1 ) is mounted, surrounds. The crossbar ( 20 ) is vertically guided at both ends in this way. By adjusting the hand lever ( 23 ) from in the 2 undressed position into position ( 23 ' ), therefore, the carriage ( 13 ) over the crossbar ( 20 ) and with it the swivel arm ( 7 ) pivoted counterclockwise, so that the saw blade from its position within the housing ( 1 ) into the working position ( 8th' ) to 2 comes.
to 1 it should be added that the rotary table ( 2 ) from a stop ( 31 ) is crossed in a bow-shaped manner on the housing ( 1 ) is attached. Miter cuts can therefore be made on workpieces that are at the stop ( 31 ) - and for example on the roll feed ( 32 ) and the counter bearing ( 33 ) - without the workpiece position needs to be changed. Despite swiveled rotary table ( 2 ) can be the immersion movement of the saw blade from below by raising the hand lever ( 23 ) cause.
Both the edition ( 32 ) as well as the stop ( 31 ) is parallel to a side wall of the housing ( 1 ) displaceable, so that, for example, at a position of the stop ( 31 ' ), as indicated by dot-dash lines, the rotary table ( 2 ) with the saw unit and the saw blade also at 90 ° to the in the 1 shown position can be pivoted so that circular saw cuts can be performed. The under-table miter saw the 1 is equipped with an adjustable tensioning device ( 34 ) and with a suction device ( 35 ) provided for accumulating chips.
Due to the arrangement of the saw unit on the swivel arm ( 7 ) is a quiet and uniform delivery of the saw blade ( 8th ) is reached from below, wherein the Schwenkarmlagerung ( 6 ) can be formed so that a stable and precise guidance of the saw blade is achieved. Since the pivoting movement exclusively by the lifting movement of the carriage ( 13 ) is achieved, the Hochschwenkbewegung is also kept free of unwanted adjusting forces in other directions. The in the 1 to 5 shown under-table miter saw allowed despite the pivoting in all pivoting positions of the rotary table ( 2 ) a perfect and exact adjustment by the hand lever ( 23 ).
6 shows a variant of an embodiment similar 2 , The same parts are therefore provided with the same reference numerals. Different in the embodiment of the 6 is that here the hand lever is not the usual and in the slot ( 24 ) guided clamping device for securing its position is assigned, but that here in the region of this slot ( 24 ) a slightly outwardly projecting beyond the housing rack ( 40 ), which describes a circular arc whose center is the pivot point ( 27 ) of the hand lever ( 23 ). The toothed rack ( 40 ) is in one on the housing ( 1 ) screw-on cover ( 41 ), which in turn also a slot ( 42 ) for performing the hand lever ( 23 ) having. This is better from the 7 and 8th which also clearly show that the hand lever ( 23 ) a gear ( 43 ) associated with an axis ( 44 ), which has an outwardly pointing handwheel ( 45 ) having. This axis ( 44 ) is with the hand lever via a bracket ( 46 ) firmly attached to the hand lever ( 23 ) and a corresponding bearing for the axle ( 44 ) and for the gear. This gear ( 43 ) meshes in the toothing of the toothed strip ( 40 ). About the handwheel ( 45 ) can therefore very sensitively the position of the hand lever ( 23 ) and thus also the position of the saw blade ( 8th ).
In order to secure the respectively set position, a clamping screw ( 47 ) provided via a hand knob ( 48 ) is operable and jamming the position of the hand lever ( 23 ) on a vertical clamping bar ( 50 ) causes.
The holder ( 46 ) serves as a clamping surface. It is tightened when tightening the clamping screw ( 47 ) counterclockwise about its point of articulation ( 49 ) on the hand lever ( 23 ) pivots and presses against the clamping bar ( 50 ) parallel to the slot ( 24 ) fixed to the bottom of the housing ( 1 ) is welded. This clamp rod ( 50 ) runs between the holder ( 46 ) and the hand lever, such as in particular 9 is recognizable.