EP3278940A1 - Device for use in drywall construction - Google Patents

Abstract

The invention relates to drywall tools, in particular a device for cutting a gypsum plaster board (6) each having a cardboard layer (8, 8 ') on its two broad sides (7, 7'), with a carriage (10) which has a first blade (11). carries, which can be brought from a first rest position into a, during a displacement of the carriage (10) a severing of a paperboard layer (8) causing first working position, so that the plasterboard (6) around a breaking edge (9) is breakable, and with a second blade (25), which can be brought from a second rest position to a second working position in which a displacement of the carriage (10) has the severing of the other cardboard layer (8 ') along the breaking edge (9) result. Furthermore, the invention relates to a device for fixing the position of a guide rail (1) on the surface of a workpiece (6), with a in a groove (3) of the guide rail (1) attachable base body (40) and an attached thereto in the surface the workpiece penetrating mandrel (41 ') and a device (50) for generating a chamfer on a plasterboard.

Description

Field of engineering

The invention relates to a device for dividing a gypsum board, each having a cardboard layer on its two broad sides, with a guide rail which can be laid on the broad side of the plasterboard, and a guide rail which can be displaced along the guide profile and carries a first blade which is supported by a first blade Resting position in a, when moving the carriage, a transection of the guide rail facing paperboard position causing first working position can be brought, so that the plasterboard is breakable around a breaking edge along the path away from the guide rail cardboard layer.

The invention further relates to a device for fixing the position of a guide rail on the surface of a workpiece, in particular on a cardboard layer of a broad side of a plasterboard.

The invention further relates to a for generating a chamfer on a plasterboard with one of a support flank for resting on the broad side of the plasterboard and a contact edge for abutment on a narrow side of the plasterboard formed guide niche and several in a chamfer angle the guide niche cutting, attached to the device , In each case a different distance to the abutment edge having blades, the abutment edge in the cutting direction in front of the cutting edges of the blades each have chip outlet openings.

State of the art

The WO 2012/020330 A1 describes a device for cutting a plasterboard. On a guide rail having a guide profile, a carriage is slidable. The carriage carries a blade carrier having a blade engageable by pivoting the blade carrier from a rest position in which the blade does not engage the surface of the workpiece into a working position into which a corner of the blade engages the surface of the workpiece ,

Devices for cutting plasterboard are also known from the US 2,835,037 . DE 36 24 429 C1 . US 2,098,641 . US 5,231,764 . US 8,434,235 B2 and US 4,903,409 ,

A known device for fixing a guide rail on the surface of a workpiece has the form of a clamp, wherein a leg of the clamp can be inserted into a profile groove. The pressure screw of the clamp is clamped from below against the back of the workpiece.

A device for producing a chamfer on a plasterboard describes the DE 196 29 202 C2 , The device described therein has the shape of a planer. The planer has a base body, which carries two successively in the cutting direction blades. The underside of the planer forms a support flank from which protrude at the two opposite ends webs, which form a contact edge for abutment on a narrow side of the workpiece. In the space between the two contact edges is the blade assembly, wherein in each case before a cutting edge a chip outlet opening is formed. An apparatus for generating chamfers is also in the DE 87 03 786 described.

The FR 2.120.206 describes a dicing device with three successively arranged in the cutting direction blades.

Summary of the invention

The invention has for its object to provide a nutzsvorteilhaft further developed device for use in dry construction.

The object is achieved by the invention specified in the independent claims.

The dependent claims represent not only advantageous developments, but also independent solutions of the task.

A first complex of the invention relates to a device with which a plasterboard can be divided. On a provided with a cardboard layer wide side of the plasterboard a guide rail is placed. In this case, a bearing surface of the guide rail comes in flat contact with the broadside. The then upwardly facing top of the guide rail has a guide profile, such as a groove or a projection. The guide profile extends in the machining direction. It is provided a carriage which is displaceable along the guide profile relative to the guide rail. He has a matching profile for the guide profile, for example, a groove or engaging in a guide projection. The carriage has a first blade carrier. This carries a blade that can be brought from a rest position to a working position. In the rest position no working portion of the blade protrudes from a body of the carriage so that it could have an effect on the top of the workpiece. The blade carrier is from the rest position to a working position brought. In this working position, a working section of the blade protrudes out of the underside of the base body carrying the blade carrier in such a way that a displacement of the carriage along the guide rail leads to a severing of the cardboard layer. For this purpose, for example, a corner of the blade needs to penetrate only slightly into the surface of the workpiece in order to produce an incision at least partially penetrating the cardboard layer. The plasterboard is then bendable around this incision. A kink develops on the cardboard layer opposite the divided cardboard layer. It forms a breaking edge through the gypsum core of the plasterboard, which extends along the incision. Inventive and / or advantageous properties are the following: It is provided a second blade, which can also be brought from a rest position to a working position. For this purpose, the second blade is held by a second blade carrier. Preferably, the second blade carrier can be pivoted about a second pivot axis. The first blade carrier and the second blade carrier can be moved independently of each other from the rest position to the working position and back. In the working position of the second blade carrier causes a displacement of the carriage, the transection of the pioneering from the guide rail cardboard layer along the breaking edge. This will result in a complete separation of the broken piece from the plasterboard. In a preferred embodiment of the invention, it is provided that the blades of the two blades facing in opposite directions, so that in a forward movement of the carriage along the guide rail, the upward facing the guide rail cardboard layer is severed and after breaking through the gypsum core of the plasterboard in a reciprocating motion in the opposite direction, the second blade severed by the guide rail pioneering cardboard layer. The cutting of the plasterboard is thus carried out in three consecutive processing steps, wherein in the first processing step, the second blade carrier assumes its rest position and brought the first blade carrier in the working position becomes. In this working position, the carriage is displaced in a first direction along the guide rail. In a second step, the core of the plasterboard is broken, so that the broken piece occupies an angle to the plate and is only connected to the ground facing away from the guide rail cardboard layer with the plasterboard. In a third processing step, the second blade carrier is brought from its rest position to the working position. The first blade carrier assumes its rest position. In a shift back of the carriage along the guide rail, the other plasterboard layer is severed at a kink. The two blade carriers can each be assigned to the carriage or a base body so as to be pivotable about a pivot axis. The two pivot axes can run parallel to each other. In particular, it is provided that the pivot axes run perpendicular to the surface normal of the broad side or to the bearing surface of the guide rail. The pivot axes also extend perpendicular to the extension direction of the guide profile. The first blade carrier may have a handle. The handle may have a foot. The foot can einliegen in a recess of the body and be pivoted there about the first pivot axis. It may be provided a spring element which acts on the first blade carrier in its rest position. The blade carrier may have a blade holder. This blade holder may be slidably disposed in a handle cavity. For this purpose, the grip cavity has a shaft in which the blade holder is inserted. The foot may have a base into which the cavity opens. Through this base mouth, the blade can be moved out of the base. This is done by a displacement of the blade holder relative to the handle. The handle may be formed by two handles. It can be provided locking means to fix the blade holder in different displacement positions relative to the handle. This allows the cutting depth to be adjusted. The blade holder can also be so far out of the shaft of the handle herausverlagert that the blade can be changed. It is preferably a trapezoidal blade, which is positively connected to a contact surface of the blade holder adjacent to the blade holder. A sharp corner of the first blade may protrude from the base of the foot. The handle protrudes in the position of use preferably upwards from the base support. If the handle is displaced in the cutting direction of the first blade, the torque exerted on the handle causes the first blade carrier to pivot into the working position. If the handle is acted upon in the opposite direction, ie in the reciprocating motion in which the second blade is used, the first blade carrier is subjected to torque in the opposite direction. Because of a stop, the first blade carrier but can not pivot. With the handle thus the slide can be both pushed back and forth, being pivoted only in the forward movement of the first blade carrier. The second blade can be carried by a blade carrier, which can be pivoted by 90 °. In the working position, the second blade preferably occupies a 30 ° to 60 ° preferably a 30 ° to 60 ° inclination to the broad side surface or to the support surface of the rail. It is preferably a 45 ° angular position. The blade may be a blade with a hook-shaped cutting edge. The blade is arranged on the base body, that the hook of the hook-shaped cutting edge in the working position of the second blade is vertically below the movement path of the first blade in the first cut, so that the second cut can be severed with the hook-shaped second blade in the second cut. The second blade thus has a portion crossing an imaginary plane perpendicular to the support surface of the guide rail, this plane passing through the cutting line created by the first blade, or through the cutting edge of the first blade. In its rest position, the second blade lies in a niche of the main body. When the device is being used, the gypsum board to be divided lies in a horizontal plane, so that the guide rail can be placed on the broadside surface of the gypsum board facing upwards. from The main body then projects a handle upwards. This handle is pivoted on the first cut. As a result, the blade enters from its rest position to the working position. When the handle is released, the spring described above provides for an automatic return displacement of the handle to a rest position of the first blade. From a side surface of the body protrudes from a knob. This knob is the second blade holder having a blade carrier having an inclined abutment surface for the second blade. By a rotational movement about the pivot axis, the second blade is brought from its rest position, in which the blade is in a niche of the body, in its working position in which it crosses an imaginary sectional plane of the first blade obliquely. In a development of the invention, fastening means can be provided in particular on the base body, with which a fixing device, as described below, can be fastened to the device. It is provided in particular that the base body has a pocket, in which one or more fastening devices, in particular in the form of fastening tongues, are arranged, with which a fixing element can be releasably secured to the device. The fixing element can be inserted into a groove of a guide rail and has mandrels which press in the support of the guide rail on a workpiece in the surface of the workpiece. The pocket can be designed so that two fixing elements can lie one behind the other in the extension direction. Each fixing element is fastened with a pair of locking tongues in the pocket.

A second complex of the invention relates to a fixing device for fixing the position of the guide rail on the surface of a workpiece. The fixing device has at least one mandrel which can be pressed into the surface of the workpiece, in particular into the cardboard layer of a plasterboard. The use of the fixing device takes place together with a guide rail. The latter has a groove that extends along the guide profile extends. The groove is open to the support side of the guide rail, so in use. It is an undercut, in particular C-shaped groove. In this groove, the elongated fixing device can be inserted. The fixing device has laterally projecting projections which can be supported on the projections forming the undercut of the groove. The mandrels protrude over the bearing surface of the guide rail down so as to be pressed into the surface of the workpiece can. The mandrels may be formed by mandrel carriers. These are preferably rotationally symmetrical bodies, which have a pin facing away from the mandrel, which can be inserted into a retaining bore of the fixing device. Between the mandrel and pin can be arranged a plate-shaped collar, with which the mandrel carrier can be supported on the underside of the fixing device. To fix the position of the fixing device within the groove of the guide rail, a clamping means may be provided. This clamping means is preferably a clamping screw. It is preferred to use a grub screw provided which can be screwed into a mounting hole, so that an end face of the grub screw can be clamped against the bottom of the groove. In a preferred embodiment, the fixing device has two or more mandrels. The mandrels are arranged one behind the other in the extension direction of the groove of the guide rail. The fixing device has a base body made of plastic, which may have three mutually parallel bores. The holes are preferably on an imaginary line. The mandrel carriers are inserted in two outer holes. In a middle hole, a self-tapping grub screw can be screwed.

A third complex of the invention relates to a device for producing a chamfer on a plasterboard. The chamfering is done on a narrow side of the plasterboard. The device that the Has function and the shape of a planer, has a support edge, which rests in the processing position of the planer on the broad side surface of the workpiece, in particular the plasterboard. From the support flank protrudes substantially at a right angle from a contact edge, so that an angle-shaped guide niche is formed. When using the bevelled planer, the abutment edge slides along the narrow side of the workpiece, wherein a plurality of blades arranged one behind the other in the direction of movement of the planer intersect cuttingly in the workpiece. The blades have such a tendency to the support flank or abutment edge that they cross the guide niche in a chamfer angle. The blades are preferably arranged in parallel planes and each have a blade which intersects both the support flank and the abutment flank. The blades have mutually different distances to an imaginary line of intersection of the support flank with the abutment edge, wherein the distances are chosen so that the blade lying in the cutting direction most cutting off with its cutting a first cross-sectionally approximately triangular strip from the corner of the plasterboard. This strip emerges from the guide niche through a chip exit opening lying in the cutting direction in front of the cutting edge. The second blade lying in the cutting direction behind the first blade has a cutting edge which cuts off a second strip of material from the narrow side of the workpiece, which has a substantially trapezoidal cross section and emerges from the guide niche through a second chip outlet opening. The third, arranged in the cutting direction behind the second blade blade has an even greater distance from the contact edge, so that it also cuts a trapezoidal cross-section strip from the narrow side, which in turn exits through a arranged in the cutting direction in front of the cutting edge of the third blade chip discharge opening. The three blades are arranged such that, in a cross-sectional plane through the guide niche, the blades, the abutment flank and the support flank each delimit triangular clearances. The three triangular spaces have different sized areas, where the free space area assigned to the first cutting edge is the smallest and the free space area assigned to the third cutting edge is the largest. According to the invention, the chip outlet openings are enclosed windows. An edge of the abutment facing away from the support flank thus extends substantially over the entire length of the planer. The abutment edge runs continuously from its front in the cutting direction to its rear in the cutting direction, the blades are arranged between the two ends. The edge of each ring-enclosed chip outlet openings is thus formed by a web of the edge of the abutment edge. In the support edge holes can open. These are fastening openings in which fastening means are arranged, with which the blades are attached to blade contact surfaces. The blades may preferably be trapezoid blades. The fasteners are preferably screws that are secured by nuts. The device may have a handle, which points away in the position of use of the broad side of the workpiece to be machined. It can be provided a holding plate, which is arranged in a broad side niche of the main body of the planer, and acts on the blades against the blade abutment surfaces. The retaining plate can be fastened by means of the screws on the base body of the planer. The support surfaces have a first inclination to the support surface or to the contact surface, which determines the chamfer angle. The blades also have an angle of attack so that the blades themselves extend at an angle oblique to the chamfer surfaces. In the area in the cutting direction in front of the cutting, the support flank cuts the abutment edge in a bending line. On the side facing away from the blades in the cutting direction, a sloping flank extends between the abutment edge and the bearing flank, which can be supported on the chamfer surface produced.

Brief description of the drawings

Fig. 1

in einer perspektivischen Darstellung eine Vorrichtung zum Zerteilen einer Gipskartonplatte, die auf einer Gipskartonplatte 6 aufliegt,

Fig. 2

die Frontansicht eines auf einer Führungsschiene 1 verschieblichen Schlittens,

Fig. 3

eine Frontansicht des Schlittens,

Fig. 4

eine Unteransicht des Schlittens,

Fig. 5

eine Draufsicht des Schlittens,

Fig. 6

den Schnitt gemäß der Linie VI-VI in Figur 5, wobei eine erste Klinge 11 in einer Verwahrstellung einliegt und der die erste Klinge 11 tragende Klingenträger 12,13,14 eine Ruhestellung einnimmt,

Fig. 7

eine Darstellung gemäß Figur 6, bei der ein Klingenhalter 12 derart aus einer Griffanordnung 13,14 herausverlagert ist, dass die Klinge 11 gewechselt werden kann,

Fig. 8

eine perspektivische Darstellung des Schlittens 10 in der in Figur 7 dargestellten Betriebsstellung,

Fig. 9

eine Darstellung gemäß Figur 6, wobei die Klinge 11 eine Betriebsstellung einnimmt, in der eine Ecke 11' der Klinge 11 aus einer Unterseite 20 eines Fußes 30 herausragt und der Klingenträger 12, 13, 14 in eine derartige Arbeitsstellung gebracht worden ist, in welcher die Ecke 11" einen Einschnitt 9' in eine Kartonlage 8 einer Gipskartonplatte 6 erzeugt,

Fig. 10

eine weitere Seitenansicht des Schlittens 10, wobei der erste Klingenträger 12,13,14 seine Ruhestellung einnimmt und ein zweiter Klingenträger 24, 26 von seiner in den Figuren 1 bis 9 dargestellten Ruhestellung in eine Arbeitsstellung gebracht ist,

Fig. 11

einen Schnitt gemäß der Linie XI-XI in Figur 10, in dem ersichtlich ist, dass die zweite Klinge 25 in ihrer Arbeitsstellung unterhalb der von der ersten Klinge 11 erzeugten Schnittlinie liegt, um entlang einer Bruchkante 9 die nach unten weisende Kartonlage 8' zu durchtrennen,

Fig. 12

eine weitere perspektivische Darstellung des Schlittens 10, wobei der zweite Klingenträger 24, 26 seine Arbeitsstellung einnimmt,

Fig. 13

eine erste Explosionsdarstellung,

Fig. 14

eine zweite Explosionsdarstellung,

Fig. 15

eine erste perspektivische Darstellung einer Fixiervorrichtung 40,

Fig. 16

eine zweite perspektivische Darstellung der Fixiervorrichtung 40,

Fig. 17

eine Draufsicht auf die Fixiervorrichtung 40,

Fig. 18

eine Führungsschiene 1 mit in einer Nut 3 eingeschobener Fixiervorrichtung 40,

Fig. 19

vergrößert den Abschnitt XIX-XIX in Figur 18,

Fig. 20

einen Fasenhobel in der Ansicht,

Fig. 21

einen Fasenhobel in der Darstellung gemäß Figur 20, jedoch mit entfernter Halteplatte 63,

Fig. 22

den Schnitt gemäß der Linie XXII-XXII in Figur 21,

Fig. 23

die Draufsicht auf den Fasenhobel,

Fig. 24

eine Ansicht gemäß Pfeil XXIV in Figur 20,

Fig. 25

vergrößert den Abschnitt 25 in Figur 24,

Fig. 26

eine Ansicht in Gegenrichtung,

Fig. 27

eine Unteransicht des Fasenhobels,

Fig. 28

einen perspektivischen Schnitt gemäß der Linie XXVIII-XXVIII in Fig. 21,

Fig. 29

einen perspektivischen Schnitt gemäß der Linie XXIX-XXIX in Fig. 20,

Fig. 30

einen Schnitt gemäß den Schnittlinien XXX-XXX in den Figuren 20 beziehungsweise 23, wobei die Schnittebene quer zur Erstreckungsebene einer Klinge 55 verläuft und um Winkel (β, y) zu einer senkrechten Ebene zur Bearbeitungsrichtung des Fasenhobels um die Winkel (β, y) geneigt ist,

Fig. 31

ein weiteres Ausführungsbeispiel einer Vorrichtung, wie sie in den Figuren 1 bis 14 dargestellt ist, bei der Fixierelemente, wie sie in den Figuren 15 bis 19 dargestellt sind, in einer Tasche 70 lösbar befestigt sind.

In the following the invention will be explained in more detail by means of exemplary embodiments. Show it:

Fig. 1

in a perspective view, a device for cutting a plasterboard, which rests on a plasterboard 6,

Fig. 2

the front view of a slidable on a guide rail 1 slide

Fig. 3

a front view of the carriage,

Fig. 4

a bottom view of the carriage,

Fig. 5

a top view of the carriage,

Fig. 6

the section according to the line VI-VI in FIG. 5 wherein a first blade 11 rests in a storage position and the blade carrier 12, 13, 14 carrying the first blade 11 assumes a rest position,

Fig. 7

a representation according to FIG. 6 in which a blade holder 12 is displaced out of a handle arrangement 13, 14 such that the blade 11 can be exchanged,

Fig. 8

a perspective view of the carriage 10 in the operating position shown in Figure 7,

Fig. 9

a representation according to FIG. 6 wherein the blade 11 assumes an operating position in which a corner 11 'of the blade 11 protrudes from a bottom 20 of a foot 30 and the blade carrier 12, 13, 14 has been brought into such a working position in which the corner 11 "an incision 9 'produced in a cardboard layer 8 of a plasterboard 6,

Fig. 10

a further side view of the carriage 10, wherein the first blade carrier 12,13,14 assumes its rest position and a second blade carrier 24, 26 of his in the FIGS. 1 to 9 shown rest position is brought into a working position,

Fig. 11

a section along the line XI-XI in FIG. 10 in that it can be seen that the second blade 25 in its working position lies below the cutting line generated by the first blade 11 in order to cut along a breaking edge 9 the downwardly facing cardboard layer 8 ',

Fig. 12

a further perspective view of the carriage 10, wherein the second blade carrier 24, 26 assumes its working position,

Fig. 13

a first exploded view,

Fig. 14

a second exploded view,

Fig. 15

a first perspective view of a fixing device 40,

Fig. 16

a second perspective view of the fixing device 40,

Fig. 17

a top view of the fixing device 40,

Fig. 18

a guide rail 1 with inserted in a groove 3 fixing device 40,

Fig. 19

enlarges section XIX-XIX in FIG. 18 .

Fig. 20

a bevel planer in the view

Fig. 21

a chamfer in the presentation according to FIG. 20 but with the retaining plate 63 removed,

Fig. 22

the section according to the line XXII-XXII in FIG. 21 .

Fig. 23

the top view of the chamfering planer,

Fig. 24

a view according to arrow XXIV in FIG. 20 .

Fig. 25

increases section 25 in FIG. 24 .

Fig. 26

a view in the opposite direction,

Fig. 27

a bottom view of the bevelled planer,

Fig. 28

a perspective section along the line XXVIII-XXVIII in Fig. 21 .

Fig. 29

a perspective section along the line XXIX-XXIX in Fig. 20 .

Fig. 30

a section according to the section lines XXX-XXX in the Figures 20 or 23, wherein the cutting plane extends transversely to the plane of extent of a blade 55 and is inclined by angles (β, y) by angles (β, y) to a vertical plane to the machining direction of the chamfer plane,

Fig. 31

a further embodiment of a device, as in the FIGS. 1 to 14 is shown in the fixing, as in the FIGS. 15 to 19 are shown, are releasably secured in a pocket 70.

Description of the embodiments

The FIGS. 1 to 14 show a first embodiment of the invention, which is a device for dividing a plasterboard 6. A gypsum board has a gypsum core and two facing broad sides 7, 7 ', which are each coated with a cardboard layer 8, 8', which gives the gypsum board 6 stability. To divide a plasterboard 6 along a section line 9 ', an incision 9' is first made in a first broad side 7. Subsequently, the gypsum core of the plasterboard 6 along this section line 9 'is broken, so that a breaking edge 9 is formed and the broken part is connected only via the now angled second cardboard layer 8' with the rest of the plate. The complete division is made by a second cut by the second cardboard layer 8 'is divided along a bending angle. The in the FIGS. 1 to 14 illustrated device allows a simplified implementation of this method.

It is provided a guide rail 1, which may be an aluminum profile body. The guide rail 1 forms a guide profile 2. This is a projection 5 extending along the guide rail 1. The projection 5 forms on its rear side, namely the bearing surface of the guide rail 1, a guide groove 3. In the guide groove 3 is an undercut groove 3, wherein the undercuts of projections 5 are formed, which protrude into the groove inside in the region of the mouth of the groove 3. The guide profile 2 forms a further projection 4, which projects laterally from the guide profile 2.

A basic body of the dividing device is referred to below as carriage 10. The carriage 10 has a guide recess 23 into which the guide rib 2 formed by the guide profile projects. The guide recess 23 has a plurality of projections 36 which can engage in the intermediate space between the projection 4 and the rail body of the guide rail 1. The carriage 10 is thus positively connected to the guide profile 2 and along the guide profile 2 slidably.

The carriage 10 forms a base body 22, which has the guide recess 23 and a recess 29. In the recess 29, which has a substantially rectangular outline, there is a foot 30 of a handle, which consists of two handle shells 13, 14. The foot 30 is pivotally mounted by means of a pivot axis 18 within the recess 29. The pivot axis 18 is located on a first side of the foot 30, which forms a short lever arm. On the other side of the foot 30 is a stop shoulder 32, which rests in a rest position of the handle assembly 13,14 to a stop 31. In this rest position, a bottom 20 runs of the foot 30 at an acute angle within the recess 29 to the underside of the main body 22nd

Within the handle 13,14 is a blade holder 12. The blade holder 12 has a contact surface on which a trapezoidal blade 11 rests. A corner 11 "of the cutting edge 11 'of the blade 11 projects beyond a lower end of the blade holder 12. The upper end of the blade holder 12 has locking projections 16 which can engage in latching niches 17 of the handle shells 13, 14. By pressing on a push button 15 and an elastic deformation of the blade holder 12, the latching projections 16 can emerge from the latching niches 17, so that the blade holder 12 within the handles 13,14 of the in the FIG. 6 shown Deposit of the blade 11 in the in FIG. 7 illustrated change position of the blade 11 can be brought. In this position, the blade 11 supporting portion of the blade holder 12 protrudes substantially completely from the bottom 20 of the foot 30 out.

The blade holder 12 is so longitudinally displaceable in the channel 21 formed by the handle shells 13, 14 and arranged with the locking means 16, 17 that in an operating position, as they FIG. 9 shows a corner 11 "protrudes from the bottom 20 of the foot 30. Hereby takes the handle 13, 14 his in the FIG. 10 illustrated rest position, the corner 11 "does not protrude beyond the underside of the base body 22, but is located entirely within the recess 29th

By applying a torque to the handle 13,14, the handle 13,14 can be pivoted about the pivot axis 18. As a result, the leg spring 19 is tensioned. The stop shoulder 32 moves away from the stop 31 and the corner 11 "of the blade 11 projects below the underside of the base body 22, so that the cutting edge 11 'at a longitudinal displacement of the carriage 11 generates an incision 9 'in the cardboard layer 8. When the handle 13, 14 is released, the spring 19, which then relaxes, sets the blade carrier 12 formed by the handle 13, 14 back into the rest position.

In this first working position of the first blade 11 described above (see FIG. 9 ) are introduced into an upwardly facing cardboard layer 8 of a plasterboard 6, a first incision 9 ', in which the uppermost cardboard layer 8 is completely severed. The spring 19 has such a spring force that pivots when applied to the handle assembly in the machining direction of the handle 13,14, so that the cutting edge 11 'cuts an incision 9' in the paperboard layer 8.

In a second step, the core of the plasterboard 6 is then broken, so that a portion 6 depends vertically from the remaining in the horizontal plane plate down, as it FIG. 11 shows.

For severing the downwardly facing second paperboard layer 8 'in the region of the kink formed during this process, a second blade 25 is provided. The second blade 25 is arranged inclined relative to the base body 22, that its cutting edge 25 'in the working position of the second blade 25 is vertically below a line laid in the cutting direction by the first blade 11 and thus is capable of, in a 45 ° Angle the cardboard layer 8 'to divide. For this purpose, the carriage is moved in the opposite direction. This is also done by introducing a force into the handle, but then not pivoted because the stop shoulder 32 abuts the stop 31.

The second blade 25 is supported by a second blade carrier 24, 26. A blade holder 24 has a contact surface 35 which has a surface normal, which is inclined by 45 ° to a pivot axis 27, with the Blade holder 24 relative to the base body 22 can be pivoted by 90 °. The pivot axis 27 is as well as the pivot axis 18 in the normal position of use of the device in a horizontal plane and extends perpendicular to the extension direction of the guide profile 2 and the extension direction of the guide recess 23, ie to the direction of movement of the carriage 10th

The second blade holder 24 is overlapped by a cap 26 which can also perform a holding function to hold the blade 25 against the abutment surface 35.

The blade holder 24 is inserted in a bearing recess 33 on a side wall of the carriage 10. From a bottom surface of the bearing recess 33 protrudes a journal 34, which projects into a bearing cavity of the blade holder 24. In a bore of the journal 34, the pivot axis 27 is inserted.

The blade 25 is positively secured to the blade holder 24. For this purpose, fixing ribs of the blade holder 24 protrude into attachment niches of the blade 25 formed as a double hook blade. The cutting edge 25 'of the blade 25 has an arcuate shape. The hook formed thereby completes the separating cut through the cardboard layer 8 '.

Except for the fastening screws with which the two handles 13, 14 are connected to each other, the blades 11, 25 and the axes 18, 27 and the spring 19, the other components, ie the handles 13, 14, the blade holder 12, the body 22, the blade holder 24 and the cap 26 are made of plastic.

The FIGS. 15 to 19 show a fixing device 40 or equipped with a fixing device 40 guide rail 1, wherein the guide rail 1 can also be equipped with a plurality of such fixing devices 40.

When fixing device 40 is an elongated plastic body which can be inserted into the groove 3 of the guide rail 1. Protruding laterally from a core region of the plastic body 40 projections 45 are supported on the walls of the groove 3 and in particular on the two inwardly directed from the groove edge projections 4 from.

The fixing device 40 has a base body 40, which has three holes 42, 43 aligned parallel to one another. Two bores 42 are provided, which are retaining bores for a journal 41 "of a mandrel carrier 41. The mandrel carrier 41 has a circular disk-shaped section, one mandrel 41 'of one broad side of the circular disk-shaped section and the other of the other side Spigot 41 "protrudes. The mandrel carrier 41 stuck in such a clamping in the retaining holes 42 that the pins 41 'protrude from the mouth of the groove 3 and push in the support of the guide rail 1 on a workpiece in the surface of the workpiece. When using the guide rail 1 on a plasterboard 6, the mandrels 41 'thus press into the cardboard layer 8 of the broad side. 7

In the central bore 43, which forms a mounting hole, a grub screw 44 is screwed. The grub screw may have a self-tapping thread which cuts into the smooth-walled bore. The pioneering side of the grub screw 44 leading away from the screwing tool inlet opening of the grub screw 44 can be clamped in a clamping end Plant are brought to the bottom surface of the groove 3 in order to fixate the fixing device 40 within the groove 3.

The FIGS. 20 to 30 show a chamfering machine. The chamfer 50 has a plastic body consisting of a handle portion and a guide portion. The guide portion forms a guide niche 53. The guide niche 53 is formed by a support flank 51, which rests on the use of the planer 50 on a broad side 7 of a plasterboard 6.

From the support flank 51 protrudes a contact edge 52 approximately at a right angle. The Anflageflanke 52 serves to bear the planer 50 to a narrow side edge of a plasterboard 6, and is formed by a strip-like extension.

The planer 50 has in the cutting direction successive blades 54, 55, 56. The three blades each have a pointing in the same direction cutting 54 ', 55', 56 '. The blades 54, 55, 56 are spaced from each other in the cutting direction.

In the cutting direction in front of the cutting edge 54 'of the first blade 54 is a chip outlet opening 57. In cutting direction in front of the cutting edge 55' of the blade 55 is a chip outlet opening 58. In the cutting direction in front of the cutting edge 56 'of the blade 56 is another chip outlet opening 59th

The chip outlet openings 57, 58, 59 form windows in the region of the strip-shaped section of the planer 50, which forms the contact edge 52 and is connected in the same material as the main body forming the support flank 51.

The three blades 54, 55, 56 are inclined by a chamfer angle α with respect to both the abutment flank 52 and the support flank 51. In a cross-sectional plane, the cutting edges 54 ', 55', 56 'each form edges of a triangle whose two other edges are formed by the cross-sectional lines of the support flank 51 and the abutment flank 52. The triangles are similar to each other. The triangle formed by the cutting edge 54 'of the first blade 54 is the smallest triangle. The triangle formed by the cutting edge 55 'of the second blade 54 has a larger cross-sectional area. The triangle formed by the last cutting blade 56 and its cutting edge 56 'in the cutting direction has the largest cross-sectional area. The blades 54, 55, 56 extend in parallel planes to each other, but have different distances to the abutment edge 52nd

The FIG. 20 shows a section line XXX, which at an angle to the cutting line XXIX in FIG. 21 is inclined. The cutting edges 54 ', 55', 56 'extend along the line inclined by the angle y.

The FIG. 23 shows that the section line XXX beyond by an angle β with respect to in FIG. 21 with XXIX cross-sectional plane inclined. The blades 54, 55, 56 extend perpendicular to the cutting plane of the in FIG. 30 shown section. They thus have an angle of attack β to the chamfer surface plane. The angle of attack β is a rake angle for peeling off the strips of material.

The chip outlet openings 57, 58, 59 are closed to the downwardly facing free edge of the abutment edge 52 and of the abutment edge 52 forming strip-shaped portion. Each webs 60 are formed. The webs 60 form a continuous strip between the two ends of the abutment edge 52 facing away from one another.

There are mounting holes provided by the fastening means, such as screws for attaching the blade 54, 55, 56 serve on blade contact surfaces. The attachment openings 61 open into the support flank 51. Attachment openings 61 extend in the in the FIG. 30 illustrated section plane. The attachment opening 61 has a hexagonal cross section, so that a nut 66 rotatably receives therein. The mouth 61 'of the attachment opening 61 is located in the support flank 51. A fastening screw 65 is provided, the head of which is supported on the bottom of a fastening opening 64 of a retaining plate 63. The threaded shank of the fastening screw 65 is screwed into the nut 66.

The holding plate 63 is substantially positively in the recess 62 and acts on the blades 54, 55, 56 against a flat contact surface against which the blades 54, 55, 56 lie flat. To change the blades, the three fastening screws 65 must be removed from the nuts 66 so that the retaining plate 63 can be removed.

In the cutting direction before the cutting blade in the first blade 54, the support edge 51 and abutment edge 52 meet at a right angle. In the cutting direction behind the blades 54, 55, 56 extends between abutment edge 52 and support edge 51, a sloping edge 68 which is supported on the chamfer surface generated by the blade lying in front.

The device 50 is used to create a chamfer on a narrow side of a plasterboard panel. The three blades 54, 55, 56 engage in the cutting direction successively cutting into the plasterboard, the cutting edge 54 'of the blade lying in the cutting direction 54 a triangular in cross-section strips from the narrow side of the plasterboard 6 from. The rear in the cutting direction of the blade 54th lying blades 55, 56 each cut in cross section trapezoidal strips from the narrow side of the plasterboard 6 from. The cut strips leave the guide niche 53 through the round-surrounded chip outlet openings 57, 58, 59.

The FIG. 31 shows an embodiment of a cutting device, as shown in the FIGS. 1 to 14 is shown. The base body 22 has on its upwardly facing side a recess in the form of a recess or a pocket 70. In this recess are fastening means 71, with which fixing elements, as in the FIGS. 15 to 19 are shown, can be releasably secured to the base body 22. There are provided fastening means 71, with which two of these fixing elements 40 in the extension direction one behind the other are in a latching connection to the base body 22. For this purpose, the fastening means 71 are formed by tongues which have latching projections facing each other, so that the fixing elements 40 can be inserted between two such tongues. The recess 70 extends substantially over the entire length of the base body 22.

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 by a second blade 25 which can be brought from a second rest position to a second working position in which a displacement of the carriage 10 has the severing of the leading away from the guide rail 1 cardboard layer 8 'along the breaking edge 9 result.

A device, which is characterized in that the first blade 11 is supported by a first blade carrier 12,13,14 which is pivotally associated about a first pivot axis 18 a main body 22 of the carriage 10.

A device, which is characterized in that the pivot axis 18 is perpendicular to the surface normal of the broad side 7 or a bearing surface of the guide rail 1 and perpendicular to the extension direction of the guide profile 2.

A device which is characterized by a handle 13, 14 carrying the first blade 11, which has a foot 30 which is arranged in a recess 29.

A device, characterized in that the foot 30 is pivotable about the pivot axis 18 and / or that the first blade carrier 12, 13, 14 is held by a spring 19 in the first rest position.

A device which is characterized by a blade holder 12 associated with the first blade carrier 12, 13, 14, which is arranged displaceably between two handle shells 13, 14 for exchanging the first blade 11 or for adjusting the depth of cut.

A device, which is characterized in that the first blade 11 only protrudes with a top corner 11 "from a bottom 20 of the foot 30.

A device, characterized in that the second blade 25 is supported by a second blade carrier 24, 26 which is pivotally associated with the base body 22 about a second pivot axis 27.

A device, which is characterized in that the second blade 25 extends in the second working position at an inclination angle in a range between 30 ° and 60 °, preferably 45 ° to the broad side 7 or the contact surface of the guide rail 1 and a portion of the cutting edge 25 ' the second blade 11 an imaginary perpendicular to the support surface of the guide rail 1 extending plane intersects, which passes through the cutting line 9 'generated by the first blade 11.

A device, which is characterized in that the second pivot axis 27 is perpendicular to the surface normal of the broad side 7 or the support surface of the guide rail 1 and perpendicular to the extension direction of the guide profile 2, wherein it is provided in particular that the second blade 25 abuts against a contact surface 35, which is inclined at an angle of in particular 30 ° to 60 °, preferably 45 ° to the second pivot axis 27.

A device which is characterized in that the second blade 25 has a hook-shaped cutting edge 25 ', wherein it is provided in particular that the cutting edge 25' lies in a niche 28 of the base body 22 in the second rest position.

A device, characterized by fastening means 71, with which a retractable into a groove 3 of a guide rail 1 fixing element is releasably secured to the device.

A device which is characterized in that the fixing element is a mandrel 41 'penetrating into the surface of the workpiece, in particular the cardboard layer 8.

A device, which is characterized in that the device 40 has a mandrel carrier 41 which is inserted in a holding recess 24 of the base body 40.

A device which is characterized by a clamping element, in particular a clamping screw for stationary mounting of the base body 40 within the profile groove 3.

A device characterized in that the base body 40 has an elongate shape and carries a plurality of pins 41 '.

A device which is characterized in that the chip outlet openings are annularly closed windows, a window leg being formed by a web 60 extending in the edge of the contact flank 52 remote from the support flank 51.

A device which is characterized by fastening opening 61 accessible from the contact surface 52, in which fastening means for fastening the blades 54, 55, 56 are arranged.

A device characterized in that the blades 54, 55, 56 extend in mutually parallel and spaced planes which are inclined by the chamfer angle α to the abutment surface 52 or by an angle 90 ° -α to the abutment surface 51 and by an angle of attack β are inclined to the machining direction.

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 guide rail 24 second blade holder 2 guide profile 25 blade 3 groove 25 ' cutting edge 4 head Start 26 cap 5 head Start 27 swivel axis 6 Workpiece, plasterboard 28 niche 7 broadside 29 recess 7 ' broadside 30 foot 8th cardboard layer 31 attack 8th' cardboard layer 32 stop shoulder 9 breakline 33 bearing recess 9 ' Incision, cutting line 34 journal 10 carriage 35 contact surface 11 blade 36 head Start 11 ' cutting edge 40 Basic body of the fixing device 11 " corner 12 first blade holder, carrier 41 mandrel support 13 Handle shell, handle arrangement 41 ' mandrel 14 Handle shell, handle arrangement 41 " spigot 15 push-button 42 retaining hole 16 catch projection 43 mounting hole 17 latching recess 44 screw 18 swivel axis 45 head Start 19 feather 50 slicer 20 bottom 51 contact flank 21 channel 52 bearing flank 22 body 53 leadership niche 23 guide recess 53 ' intersection 54 blade α bevel angle 54 ' cutting edge β angle of attack 55 blade γ corner 55 ' cutting edge 56 blade 56 ' cutting edge 57 Span outlet opening 58 Span outlet opening 59 Span outlet opening 60 web 61 fastening opening 62 deepening 63 retaining plate 64 fastening opening 65 Fixing screw 66 mother 67 Handle 68 sloping flank 70 bag 71 fastener

Claims (15)

Device for dividing a gypsum plaster board (6), each having a cardboard layer (8, 8 ') on its two broad sides (7, 7'), with a guide profile (2) which can be laid on the broad side (7) of the gypsum plasterboard (6) Guide rail (1) and with a along the guide profile (2) slidable carriage (10) which carries a first blade (11) from a first rest position into a, during the displacement of the carriage (10) a separation of the guide rail (1 ) pointing cardboard position (8) causing the first working position can be brought, so that the plasterboard (6) around a breaking edge (9) along the guide rail (1) pointing away cardboard layer (8 ') is characterized by a second blade (25) which can be brought from a second rest position into a second working position, in which a displacement of the carriage (10) the severing of the cardboard layer (8 ') pointing away from the guide rail (1) along the breaking edge (9) entails. Apparatus according to claim 1, characterized in that the first blade (11) by a first blade carrier (12, 13, 14) is supported, which is associated about a first pivot axis (18) pivotally connected to a base body (22) of the carriage (10) , wherein in particular it is provided that the pivot axis (18) perpendicular to the surface normal of the broad side (7) or a support surface of the guide rail (1) and perpendicular to the extension direction of the guide profile (2). Device according to one of the preceding claims, characterized by a handle (13, 14) carrying the first blade (11), which has a foot (30) which is arranged in a recess (29), wherein it is provided in particular that the foot (30) pivotable about the pivot axis (18) is and / or that the first blade carrier (12, 13, 14) by a spring (19) is held in the first rest position. Device according to one of claims 2 or 3, characterized by a the blade holder (12) associated with the first blade carrier (12, 13, 14), which is arranged displaceably between two handle shells (13, 14) for exchanging the first blade (11) and / or Adjusting the depth of cut. Device according to one of claims 3 or 4, characterized in that the first blade (11) protrudes only with a top corner (11 ") from a bottom (20) of the foot (30). Device according to one of the preceding claims, characterized in that the second blade (25) by a second blade carrier (24, 26) is supported, which is pivotally associated with the main body (22) about a second pivot axis (27), wherein in particular provided in that, in the second working position, the second blade (25) extends at an angle of inclination in a range between 30 ° and 60 °, preferably 45 ° to the broad side (7) or contact surface of the guide rail (1), and a section of the cutting edge (25 '; ) of the second blade (11) an imaginary perpendicular to the support surface of the guide rail (1) extending plane intersects, which by the first blade (11) generated cutting line (9 ') goes. Device according to one of the preceding claims, characterized in that the second pivot axis (27) perpendicular to the surface normal of the broad side (7) or the support surface of the guide rail (1) and perpendicular to the extension direction of the guide profile (2), in particular being provided that the second blade (25) on a contact surface (35) is present, which is inclined at an angle of in particular 30 ° to 60 °, preferably 45 ° to the second pivot axis (27). Device according to one of the preceding claims, characterized in that the second blade (25) has a hook-shaped cutting edge (25 °), wherein it is provided in particular that the cutting edge (25 ') in the second rest position in a niche (28) of the base body (22) lies. Device according to one of the preceding claims, characterized by fastening means (71) with which a fixing element which can be inserted into a groove (3) of a guide rail (1) is detachably fastened to the device. Device for fixing the position of a guide rail (1) on the surface of a workpiece (6), in particular on a cardboard layer (8) of a broad side (7) of a plasterboard (6) with a groove (3) of the guide rail (1) attachable Base body (40) and a fixing element attached thereto, characterized in that the fixing element is a mandrel (41 ') penetrating into the surface of the workpiece, in particular the cardboard layer (8). Apparatus according to claim 10, characterized in that the device (40) comprises a mandrel carrier (41) which is inserted in a holding recess (24) of the base body (40). Device according to one of claims 10 or 11, characterized in that the base body (40) is dimensioned such that it can be inserted into a C-shaped profile groove (3) of the guide rail (1), wherein in particular a clamping element, in particular a clamping screw for stationary Holder of the base body (40) within the profile groove (3), is provided, wherein the base body (40) may have an elongated shape and a plurality of mandrels (41 ') can wear. Device (50) for producing a chamfer on a plasterboard panel (6) with one of a support flank (51) for resting on the broad side (7) of the plasterboard panel (6) and a contact flank (52) for bearing against a narrow side of the plasterboard panel (6 ) formed guide niche (53) and a plurality of in a chamfer angle (α) the guide niche (53) intersecting, attached to the device (50), in each case a different distance to an imaginary section line (53 ') of the support flank (51) with the contact edge ( 52) having blades (54, 55, 56), wherein the abutment edge (52) in the cutting direction in front of the cutting edges (54 ', 55', 56 ') of the blades (54, 55, 56) each chip outlet openings (57, 58, 59 ), characterized in that the chip outlet openings are annularly closed windows, a window leg being formed by a web (60) extending in the edge of the abutment flank (52) remote from the support flank (51). Apparatus according to claim 13, characterized by fastening opening (61) accessible from the contact surface (52), in which fastening means for fastening the blades (54, 55, 56) are arranged and / or that the blades (54, 55, 56) engage in extending parallel and spaced planes which are inclined by the chamfer angle (α) inclined to the contact surface (52) or by an angle 90 ° -α to the support surface (51), and by an angle of attack (β) to the machining direction. Device characterized by one or more of the characterizing features of one of the preceding claims.

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