EP3138674A1 - Device for carrying out mitre cuts - Google Patents

Abstract

The invention relates to a device for carrying out miter cuts with a central element (1), the cut guide elements (8, 9) and two legs (2, 2 '), which in such a transmission (10,11,11', 20, 20 ', 21, 21') cooperate such that a section line (S) in an angle bisector to the pivot angle (±) of the legs (2, 2 ') extends, each leg (2, 2') an attachment point (11,11 ') for a locking lever (10) with which by fixing a distance of the two attachment points (11, 11 ') along a through the attachment points (11, 11') drawn connecting line (V) of the swivel angle (±) can be determined. It is essential that the locking lever (10) is shaped and hinged to the legs (2, 2 '), that he (2, 2') within a plan of the legs (2, 2 ') and the pivoting of the legs Central element (1) remains, wherein the connecting line (V) in any pivoting position by a pivot axis (28, 28 ') of the legs (2, 2') extends. The cutting guide elements (8, 9) should only in a region between the intersection of two by the two outer Schmiegeflanken (3, 3 ') drawn straight lines (a, a') and the intersection of two by the two inner Schmiegeflanken (4, 4 ') drawn straight line (b, b ') may be arranged.

Description

Field of engineering

The invention relates to a device for generating a miter cut with a central element having a cut line defining cutting guide elements and two hinged to the central member leg, which legs cooperate with such a transmission that the section line extends in an angle bisector to the adjustable and lockable pivot angle of the legs, wherein each leg has an attachment point for a locking lever, by means of which the pivoting angle can be determined by fixing a distance of the two attachment points along a connecting line drawn through the attachment points.

State of the art

The FR 2,817,892 describes a device for producing a miter cut. The device has a central element, which has two spaced cutting guide elements. The cut guide elements define a cut line. The central element is connected to two legs, which can be brought into an angular position to the central element. Via a differential gear is achieved that the cutting line runs in an angle bisector to the legs.

The DE 35 29 855 A1 describes a bevel with outer bevel flanks that can be applied to the surfaces of a component to determine the angle at which the surfaces meet. The legs each have a U-shaped channel, wherein the channel walls form contact edges to which a workpiece, for example. A strip can be applied to perform a miter cut. Each leg has one Attachment point, on each of which a locking lever engages with a first end. The second ends of the locking lever are connected to a slider which is slidably mounted on a rod which extends along the bisecting line.

The DE 101 07 766 A1 describes a cutting device for performing miter cuts, in which a central element having a cutting guide element can be rotated relative to a single limb.

From the DE 20 2007 016 558 U1 is known a Schmiege, which has two legs which are connected to a transmission element and with a central element. The two gear elements form toothed sections which engage in one another such that the extension direction of an aligner assigned to the central element extends in the bisecting line between the two legs. The curve has inner and outer Schmiegeflanken, which can be applied either at an acute angle to each other abutting surfaces of a component or at an obtuse angle to each other striking surfaces of a component.

Summary of the invention

The invention has for its object to improve a generic Schmiege use advantage.

The object is achieved by the invention specified in the claims, wherein the dependent claims represent not only advantageous developments of the independent claims, but also independent solutions to the problem.

First and foremost, measures are taken by the invention, with which the fixability of the pivot angle of the legs is improved. For this purpose, a locking lever is proposed, which is shaped and attached to the legs, that it remains at a pivoting of the legs about the pivot axis of a stretched position in a rectangular position within the outline of the legs and the central element. It is a rigid connecting lever that connects the two attachment points. The two legs can preferably pivot from a stop-limited stretched position only to a stop-limited acute-angled position, in particular a right-angled position. With the outer Schmiegeflanken obtuse angles can be tapped on a component. With the inner Schmiegeflanken can acute angles on a component tap. The two legs are preferably assigned to the central element in such a way that the edge of two surfaces of a component which are at an angle to one another can project freely into the region between the two beveled flanks. A connecting line which connects the two attachment points with each other runs in no pivoting position by a pivot axis of the legs. The attachment points are preferably arranged center-offset on a center line defined by the position of the pivot axes in the direction of a bevel edge of the limb lying inwardly with respect to the pivot angle. The locking lever is preferably a curvilinear lever. He can have a short arm and a long arm. The two arms are at an angle to each other. In a sense, they also form a bow like a polygon. The short arm and the long arm form a free space between them. This space may be surrounded by an arcuate portion of the locking lever. The short arm is attached with a first attachment point. The long arm is attached with a second attachment point. The long arm carries a slot, with the slot extending in the extension direction of the long arm. Through the slot engages a clamping screw, with the location of the attachment point on the long arm can be fixed. By the cutting guide elements are arranged only in a region between the intersection lines of two drawn by the two outer Schmiegeflanken straight line and the intersection of two drawn by the two inner Schmiegeflanken straight lines, it is ensured that both with the inner and with the outer Schmiegeflanken the angle two it can be tapped in an edge meeting surfaces of a component. Each leg has at least one abutment edge for abutment of the workpiece. The at least one abutment edge runs parallel to the two Schmiegeflanken. Preferably, however, the leg has a channel into which the workpiece can be inserted, wherein the two mutually facing channel walls form contact edges. The invention proposes a device for producing a miter cut, with which not only cutting guide elements in the desired miter angle can be brought. With the device according to the invention both acute and obtuse angles of two surfaces of a component which meet in an edge can be tapped off, both with the inner and with the outer bevel flanks facing away therefrom. With the inner Schmiegeflanken the acute angles can be tapped. With the outer Schmiegeflanken the obtuse angles can be tapped. The bevel flanks extend in such a way that the intersections of straight lines that run through the respective bevel flanks are located substantially outside the plan of the device.

Brief description of the drawings

Fig. 1

in einer perspektivischen Darstellung eine Schneidlade,

Fig. 2

die Ansicht gemäß Pfeil II in Figur 1;

Fig. 3

die Rückansicht der Schneidlade,

Fig. 4

die Seitenansicht der Schneidlade,

Fig. 5

die Draufsicht auf die Schneidlade,

Fig. 6

der Schnitt gemäß der Linie VI - VI in Figur 5,

Fig. 7

die Unteransicht der Schneidlade in einer anschlagbegrenzten Gestrecktlage der beiden Schenkel der Schneidlade,

Fig. 8

eine Darstellung gemäß Figur 7 jedoch mit in einer Winkelstellung gebrachten Schenkeln,

Fig. 9

die Draufsicht auf die Schneidlade in der Funktionsstellung gemäß Figur 8,

Fig. 10

eine Darstellung gemäß Figur 10 mit weiter verkleinerten Schwenkwinkel der Schenkel,

Fig. 11

eine Darstellung gemäß Figur 7 jedoch in einer anschlagbegrenzten rechtwinkligen Stellung der beiden Schenkel,

Fig. 12

eine erste Explosionsdarstellung und

Fig. 13

eine zweite Explosionsdarstellung der Elemente der Schneidlade.

In the following the invention will be explained in more detail with reference to an embodiment. Show it:

Fig. 1

in a perspective view of a cutting load,

Fig. 2

the view according to arrow II in FIG. 1 ;

Fig. 3

the rear view of the cutting drawer,

Fig. 4

the side view of the cutting drawer,

Fig. 5

the top view of the cutting drawer,

Fig. 6

the section according to the line VI - VI in FIG. 5 .

Fig. 7

the bottom view of the cutting load in a stop-limited stretched position of the two legs of the cutting load,

Fig. 8

a representation according to FIG. 7 but with legs in an angular position,

Fig. 9

the top view of the cutting loader in the functional position according to FIG. 8 .

Fig. 10

a representation according to FIG. 10 with further reduced pivoting angle of the legs,

Fig. 11

a representation according to FIG. 7 but in a stop-limited right-angled position of the two legs,

Fig. 12

a first exploded view and

Fig. 13

a second exploded view of the elements of the cutting loader.

Description of the embodiments

The cutting drawer shown in the drawings is a device for generating miter cuts and at the same time able to tap the cutting angle at two mutually angled surfaces of a component.

The cutting drawer has a central element 1 with a substantially circular floor plan, which has two bearing bores 25 and at its edge in each case two pairs of apertures 24. In the pairs of openings 24 respectively pin pairs 8, 9 are inserted, the cutting guide elements 8, 9 form. Between the pins, a slot forms, can be guided by a saw blade. The two slots of the cut guide elements 8, 9 define a section line S.

The device has two substantially mirror-symmetrical legs 2, 2 ', each leg having an outer Schmiegeflanke 3, 3' and an opposite inner Schmiegeflanke 4, 4 '. The outer Schmiegeflanken 3, 3 'are parallel to the inner Schmiegeflanken 4, 4'. The Schmiegeflanken 3, 3 ', 4, 4' are formed by the housing longitudinal edges of the legs 2, 2 '. Each leg 2, 2 'also forms an upwardly open channel 7, 7'. The channel 7, 7 'has two mutually parallel channel walls 5, 5', 6, 6 '. The channel walls form contact edges 5, 5 ', 6, 6' for the installation of a workpiece, which is to be mitred with a saw. The contact edges 5, 5 ', 6, 6' run parallel to the beveled edges 3, 3 ', 4, 4'. The channel walls also have lateral openings 23rd

On the underside of the legs 2, 2 'are gear or controls 20, 20' attached. The controls 20, 20 'are metal strips, which are fastened by means of four screws on the underside of the legs 2, 2 '. The controls 20, 20 'project freely from the legs 2, 2' and have bearing bores 22, 22 ', which pivot axes 28, 28' form around which the legs 2, 2 'relative to the central element 1 can be pivoted. The bearing bores 22, 22 'are aligned with the bearing bore 25th

From the top of the bottom of the legs 2, 2 'projecting bearing pins 26, 26' in the bearing bores 25 a.

The two legs 2, 2 'can only pivot jointly, since the controls 20, 20' arcuate portions 21, 21 'form, which engage with each other, so that upon pivoting of the legs 2, 2', the section line S forms the bisector of the pivot angle α ,

There are stops 31, 31 'are provided, which in the extended position ( FIG. 7 ) abut against counterstops of an extension 32 of the central element 1. For limiting the stop of the extended position but other stop elements may be provided, eg., A peripheral edge of the control element 20, 20 'abut against a stop edge of the central element 1. The legs 2, 2 'also form stops 33, 33', which in the orthogonal position ( FIG. 11 ) can clash. Here too, it is alternatively provided that other stops limit the right-angled position, for example, a peripheral edge of the control element 20, 20 ', which abuts against a contact flank of the central element 1.

The two bearing bores 25 or the pivot axes 28, which are defined by the bearing bores 25, define the position of a center line M, M 'which extends in the extension direction of the leg 2, 2'. Between this center line M, M 'and the pivoting inner side facing inner Schmiegeflanke 4, 4 'are a first attachment point 11' of the first leg 2 'and second attachment point 11 of the second leg 2. The two attachment points 11, 11' are connected to a locking lever 10 with each other. The locking lever 10 is a rigid lever which has a curvilinear extent course. He has a hook-shaped figure. He has a short lever arm 13, which passes to a certain extent to form a curvature or a polygonal arc in an opposite curved long lever arm 14. The free end of the short lever arm 13 is by means of a fastening screw 17 which passes through a bore 16 of the locking lever 10 on the first leg 2 'rotatably mounted. Through the slot 12 engages a clamping screw 18 which is inserted in a through hole of the second leg 2, which opens into a recess 33 of a wall of the channel 7. In the recess 33 is an actuating handle 19 with an internal thread into which the threaded portion of the clamping screw 18 is screwed. With the actuating handle 19 can exert a clamping force with which the head of the clamping screw 18 presses the edge of the slot 12 against the underside of the leg 2, so that the effective length of the locking lever 10 is adjustable. The effective length of the locking lever 10 is the distance of the attachment points 11,11 'on the drawn through the attachment points 11,11' connecting line.

The attachment points 11, 11 'are arranged in such a way that when the legs 2, 2' are pivoted away from the extended position (FIG. FIG. 7 ) to the orthogonal position ( FIG. 11 ) about the pivot axes 28 further remove the latter from the connecting line V. The connecting line is crossed during pivoting of the legs 2, 2 'of none of the pivot axes 28.

The locking lever 10 is shaped and connected to the legs 2, 2 ', that in each pivot position within the outline of the Cutting load is. Preferably, the cutting loader has no element which extends beyond lines a, a ', b, b', which are drawn along the Schmiegeflanken 3, 3 ', 4, 4' and intersect in the section line S. The cutting guide elements 8, 9 and preferably all other elements of the central element 1 lie in each pivot position between the intersections of the lines b, b 'and a, a'.

The locking lever 10 has such an arcuate course that he in the rectangular position of the two legs 2, 2 'a foot 27 with which the leg 2' can be placed on a substrate surrounds. The point of intersection of the two lines B, B 'lies in the orthogonal position within a V-shaped free space 15 between the short arm 13 and the long arm 14. The point of intersection is, as it were, arcuate.

In the stretched position ( FIG. 7 ) have the two edges 31, 31 'of the legs 2, 2' a distance 30 from each other, which increases with a reduced pivot angle α. The two opposite edges 33, 33 'have a distance 29 from each other, which decreases α with a reduced pivot angle.

The functioning of the cutting loader is the following:

With dissolved actuation handle 19, the two legs 2, 2 'can pivot freely about its pivot axis 28, so that the angle of two striking in an edge surfaces of a component, for example. A wall of a room can be tapped. For tapping off an acute angle, the inner Schmiegeflanken 4, 4 'brought into surface conditioning. For tapping off an obtuse angle, the outer Schmiegeflanken 3, 3 'brought into surface conditioning. Subsequently, the actuating handle 19 is tightened so that the pivot angle α is fixed. Now one or more workpieces can be mitred by being inserted into the channel 7 and held in surface contact with one of the abutment flanks 5, 5 ', 6, 6'. The workpiece is in the space between the two cutting guide elements 8, 9, which are located within the space, which is bounded by the lines a, a ', b, b'. Preferably, the pivoting range of the legs 2, 2 'is limited to a range of 90 degrees to 180 degrees.

The above explanations serve to explain the inventions as a whole, which further develop the state of the art independently, at least by the following feature combinations, namely:

A device which is characterized in that the locking lever 10 is shaped and hinged to the legs 2, 2 ', that it at a pivoting of the legs 2, 2' about the pivot axis 28, 28 'from an extended position to a rectangular position remains within the outline of the legs 2, 2 'and the central element 1, wherein the connecting line V in no pivoting position by a pivot axis 28, 28' of the legs 2, 2 'extends;

A device, which is characterized in that the fixing points 11, 11 'relative to a center line defined by the position of the pivot axis 28, 28' M, M 'offset in the direction of a relative to the pivot angle α inside Schmiegeflanke 4, 4' of the legs 2, 2 'are arranged;

A device, characterized in that the locking lever 10 is a short arm 13 which is hinged to the attachment point 11 'of the first leg 2' and a long arm 14 which is secured with a slot 12 at the attachment point 11 of the second leg 2 is, wherein the arms 13, 14 form a free space 15 between them;

A device characterized by a clamping member 18 engaging the long arm 14;

A device which is characterized in that the two arms 13,14 in the manner of an arc surrounding the space 15, in particular such that in the orthogonal position of the two legs 2, 2 ', a foot 27 of the first leg 2' in the free space 15 is located;

A device which is characterized in that the two legs 2, 2 'are articulated on the central element 1 using control elements 20, the two control elements 20 having intermeshing toothings 21, 21';

A device, which is characterized in that each leg 2, 2 'with its two mutually parallel longitudinal sides inner Schmiegeflanken 4, 4' or outer Schmiegeflanken 3, 3 'and at least one parallel thereto abutment edge 5, 5', 6, 6 'for planting a cutting line S crossing workpiece;

A device which is characterized in that the cutting guide elements 8, 9 only in a region between the intersection of two drawn by the two outer Schmiegeflanken 3, 3 'straight lines a, a' and the intersection of two by the two inner Schmiegeflanken 4, 4 ' drawn Straight lines b, b 'are arranged, so that both the inner Schmiegeflanken 4, 4' and with the outer Schmiegeflanken 3, 3 'of the angle of two meeting in an edge surfaces of a component can be tapped;

A device, which is characterized in that each leg 2, 2 'has a channel 7 which is bounded on both sides by abutment flanks 5, 5', 6, 6 ', the abutment flanks 5, 5', 6, 6 'openings 23 exhibit;

A device which is characterized in that the saw guide elements 8, 9 only in a region between the intersection of two drawn by the two outer Schmiegeflanken 3, 3 'straight lines a, a' and the intersection of two by the two inner Schmiegeflanken 4, 4 ' drawn straight lines b, b 'are arranged so that both with the inner Schmiegeflanken 4, 4' and with the outer Schmiegeflanken 3, 3 'of the angle of two surfaces meeting in an edge surfaces of a component can be tapped.

All disclosed features are essential to the invention (individually, but also in combination with one another). The disclosure of the associated / attached priority documents (copy of the prior application) is hereby also incorporated in full in the disclosure of the application, also for the purpose of including features of these documents in claims of the present application. The subclaims characterize with their features independent inventive developments of the prior art, in particular to make on the basis of these claims divisional applications. <b> List of Reference Numbers </ b> 1 central element 27 foot 2, 2 ' leg 28 swivel axis 3,3 ' outer Schmiegeflanke 29 distance 4, 4 ' inner flyback edge 30 distance 5, 5 ' bearing flank 31 edge 6.6 ' bearing flank 32 extension 7,7 ' channel 33 recess 8th Cut element 9 Cut element a, a ' lines 10 Locking lever b, b ' lines 11 attachment point 11 ' attachment point S intersection 12 Long hole 13 short arm α swivel angle 14 long arm 15 V / U-shaped open space 16 drilling 17 screw 18 clamping element 19 Actuating handle 20 control 20 ' control 21 gearing 22 bearing bore 23 perforation 24 opening 25 bearing bore 26 pivot

Claims (11)

Device for carrying out miter cuts with a central element (1), which has a cutting line (S) defining cutting guide elements (8, 9) and two hinged to the central element leg (2, 2 '), which legs (2, 2') in such a way Gear (10,11,11 ', 20, 20', 21, 21 ') cooperate, that the cutting line (S) in an angle bisector to the adjustable and lockable pivot angle (α) of the legs (2, 2') runs, each Leg (2, 2 ') has a fastening point (11, 11') for a locking lever (10), with which by fixing a distance of the two fastening points (11, 11 ') along a through the fastening points (11, 11') drawn connecting line (V) of the swivel angle (α) can be determined, characterized in that the locking lever (10) is shaped and articulated on the legs (2, 2 '), that it upon pivoting of the legs (2, 2') about the pivot axis (28, 28 ') of a stretched position in a rechtwi niger position within the outline of the legs (2, 2 ') and the central element (1) remains, wherein the connecting line (V) in any pivoting position by a pivot axis (28, 28') of the legs (2, 2 ') extends. Apparatus according to claim 1, characterized in that the fixing points (11,11 ') relative to a by the position of the pivot axis (28, 28') defined center line (M, M ') center offset in the direction of a relative to the pivot angle (α ) inside Schmiegeflanke (4, 4 ') of the legs (2, 2') are arranged. Device according to one of the preceding claims, characterized in that the locking lever (10) has a short arm (13) which is articulated to the attachment point (11 ') of the first leg (2') and has a long arm (14) which cooperates with a slot (12) at the attachment point (11) of the second leg (2) is fixed, wherein the arms (13,14) form a free space (15) between them. Device according to one of the preceding claims, characterized by a clamping element (18) acting on the long arm (14). Device according to one of the preceding claims, characterized in that the two arms (13,14) in the manner of an arc surround the free space (15), in particular such that in the orthogonal position of the two legs (2, 2 ') a foot (27) of the first leg (2 ') in the free space (15). Device according to one of the preceding claims, characterized in that the two limbs (2, 2 ') are articulated on the central element (1) using control elements (20), wherein the two control elements (20) have interlocking toothings (21, 21'). exhibit. Device according to one of the preceding claims, characterized in that each leg (2, 2 ') with its two mutually parallel longitudinal sides inner Schmiegeflanken (4, 4') or outer Schmiegeflanken (3, 3 ') and at least one parallel thereto conditioning flank (5, 5 ', 6, 6') for abutment of a cutting line (S) crossing workpiece. Device according to one of the preceding claims, characterized in that the cutting guide elements (8, 9) only in a region between the intersection of two by the two outer Schmiegeflanken (3, 3 ') drawn straight lines (a, a') and the intersection two drawn by the two inner Schmiegeflanken (4, 4 ') straight lines (b, b') are arranged so that both with the inner Schmiegeflanken (4, 4 ') and with the outer Schmiegeflanken (3, 3') of the angle two surfaces of a component meeting one another in an edge can be tapped off. Device according to one of the preceding claims, characterized in that each limb (2, 2 ') has a channel (7) which is bounded on both sides by abutment flanks (5, 5', 6, 6 '), the abutment flanks (5, 5 ', 6, 6') have perforations (23). Device for producing a miter cut with a central element (1) which has a cutting line (S) defining cutting guide elements (8, 9) and two hinged to the central element leg (2, 2 '), which legs (2, 2') in such a way with a transmission (10,11,11 ', 20, 20', 21, 21 ') cooperate, that the cutting line (S) in an angle bisector to the adjustable and lockable pivot angle (α) of the legs (2, 2') extends, each leg (2, 2 ') with its two mutually parallel longitudinal sides inner Schmiegeflanken (4, 4') and outer Schmiegeflanken (3, 3 ') and at least one parallel thereto conditioning edge (5, 5', 6, 6 ') to the plant a workpiece that intersects the cutting line (S), characterized in that the saw guide elements (8, 9) only in a region between the intersection of two drawn by the two outer Schmiegeflanken (3, 3 ') straight lines (a, a') and the Intersection of two through the two inner Schmie flanked (4, 4 ') straight lines (b, b') are arranged so that both with the inner Schmiegeflanken (4, 4 ') and with the outer Schmiegeflanken (3, 3'), the angle of two in an edge on each other meeting surfaces of a component can be tapped. Device characterized by one or more of the characterizing features of one of the preceding claims.

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