EP4072767A1

EP4072767A1 - Mobile handheld sawing machine having a scoring tool on a longitudinal side

Info

Publication number: EP4072767A1
Application number: EP20830116.8A
Authority: EP
Inventors: Tobias Höfer; Martin Werbach; Patrick Schnelle; Philipp SOBL
Original assignee: Festool GmbH
Current assignee: Festool GmbH
Priority date: 2019-12-13
Filing date: 2020-12-13
Publication date: 2022-10-19
Also published as: JP2023519457A; US20230027610A1; CN114786853A; WO2021116482A1; DE102019134416A1

Abstract

The invention relates to a handheld sawing machine (10) having a sawing unit (11) which has a saw tool receptacle (14) for a sawing tool (15) and a saw drive motor (12) for driving the saw tool receptacle (14), and having a guide device (17) which has a guide body (18) with a guide face (19), extending along a longitudinal axis (L), for guiding the handheld sawing machine (10) in a working direction (AR) along a workpiece (W) or a guide rail (200), wherein, using the sawing tool (15) that protrudes in front of the guide face (19) during sawing operation of the portable power tool, a sawing cut (SAE) is able to be introduced into the workpiece (W) in the working direction (AR), wherein the handheld sawing machine (10) has a scoring unit (31), arranged on the guide device (17) in front of the sawing unit (11) with respect to the working direction (AR), with a scorer tool receptacle (34) for a scoring tool (35) and with a scorer drive (32A) for driving the scorer tool receptacle (34), wherein, using the scoring tool (35) that protrudes in front of the guide face (19), a score (RI) that is located in front, in the working direction (AR), of the sawing cut (SAE) to be introduced is able to be introduced into the workpiece (W). Provision is made for the saw tool receptacle (14) and the scorer tool receptacle (34) to be arranged on a top side (19A), located on the opposite side from the guide face (19), of the guide body (18) immediately next to a free longitudinal side (18A), extending parallel to the longitudinal axis (L) of the guide body (18), of the guide body (18), such that the sawing tool (15) arranged on the saw tool receptacle (14) and the scoring tool (35) arranged on the scorer tool receptacle (34) extend past the longitudinal side (18A) of the guide body (18) and protrude in front of the guide face (19).

Description

Mobile hand saw machine with scoring tool on the long side

The invention relates to a mobile hand-held sawing machine with a saw unit, which has a saw tool holder for a saw tool, in particular a saw blade, and a saw drive motor for driving the saw tool holder, and with a guide device that has a guide body with a has a guide surface extending along a longitudinal axis for guiding the hand-held sawing machine along a working direction on a workpiece or a guide rail, with the sawing tool protruding in front of the guide surface in a sawing operation of the hand-held machine tool. The hand-held sawing machine has a scoring unit arranged in front of the saw unit on the guide device with a scoring tool holder for a scoring tool, in particular a scoring saw blade, and with a scoring drive for driving the scoring tool has recording, with the aid of the scoring tool protruding in front of the guide surface in a scoring operation of the hand-held machine tool, a scoring that is located in front of the saw cut in the working direction can be made in the workpiece.

Such a hand sawing machine is tert erläu for example in EP 0324444 A2. It is true that saw cuts can be made in the workpiece with the known hand-held sawing machine, in which the saw blade emerges on the upper side of the workpiece, but due to the scratches made by the scoring unit there is no or less damage, for example, torn chips, etc. ., causes. However, the handling of known hand sawing machines is made more difficult, for example, by the fact that the scratching tool is difficult to see in order to guide the hand machine tool along a planned crack or a planned saw cut on the workpiece.

Hand sawing machines with scoring units are also known from DE 7324551 U1 and DE 91 06212 U1.

Further hand sawing machines are known from DE 929640 B, US Pat. No. 3,277,934 and US Pat. No. 10,131,450 B2

It is therefore the object of the present invention to provide an improved hand sawing machine.

To solve this problem, a hand sawing machine of the type mentioned at the outset provides that the saw tool holder and the scoring tool holder are located on an upper side of the guide body opposite the guide surface immediately next to a free one extending parallel to the longitudinal axis of the guide body Long side of the guide body are arranged so that the sawing tool arranged on the sawing tool holder and the scoring tool arranged on the scoring tool holder extend past the free longitudinal side of the guide body and protrude in front of the guide surface.

The guide body is, for example, a plate body. The free longitudinal side is, for example, a longitudinal narrow side of this plate body.

With respect to the longitudinal axis or longitudinal center axis, the sawing tool and the scoring tool are arranged transversely on the outside of the guide body. The saw tool and the scoring tool are therefore not arranged in a recess of the guide body, but on its free long side. Although it is readily possible in the working direction in front of and / or behind and / or between the scoring tool or sawing tool, a part of the guide body protrudes transversely to the longitudinal axis, e.g. a part with an indicator with which a scribe line on the workpiece can be targeted, so to speak. In the area of the In contrast, the tool or scoring tool, the guide body is only arranged on one side of the sawing tool or scoring tool. One side, in particular a flat side, of the sawing tool or scoring tool is opposite the guide body, while the other, opposite side faces away from the guide body and there is no part of the guide body opposite. However, protective components, for example parts of a protective housing, a cover wall or the like, can be arranged on a side facing away from the guide body, in particular the flat side, of the sawing tool and / or the scoring tool, so that the sawing tool or scoring tool is sandwiched between the free longitudinal side of the guide body and the protective component is arranged. The sawmill and the scoring tool are not arranged transversely to the working direction or transversely to the longitudinal axis of the guide body between parts of the guide body, but on its free longitudinal side.

It is also advantageously provided that the saw tool holder, in particular the saw unit as a whole, is movably mounted on or with respect to the guide device using a saw depth adjustment bearing between an upper depth adjustment position and at least one lower depth adjustment position, the sawing tool continuing in the lower depth adjustment position protrudes in front of the guide surface than in the upper depth adjustment position. Thus, for example, saw cuts of different depths can be made in the workpiece.

The hand sawing machine is preferably a plunge saw in which the saw depth adjustment bearing is arranged behind the saw tool holder in the working direction.

The hand sawing machine preferably has no protective cover for the sawing tool and / or the scoring tool in front of the guide surface. The hand sawing machine advantageously has no pendulum hood. It is preferred if the hand saw machine does not have any with regard to the saw tool holder and / or with regard to the scorer tool holder having movable protective cover for the sawing tool or the scoring tool or both. Each of these measures can be provided separately.

It is further preferred if the scoring tool holder, in particular the scoring unit as a whole, on or with respect to the guide device using a scoring depth adjustment bearing separate from the saw depth adjustment bearing between at least one active position in which the scoring tool arranged on the scoring tool holder is in front the guide surface protrudes and is movably mounted in an inactive position in which the scoring tool is moved back behind the guide surface. Thus, the scoring tool can, for example, be moved to the inactive position when no scoring is to be made.

The saw depth adjustment bearing and the scoring depth adjustment bearing are preferably arranged at a longitudinal distance with respect to the working direction on the guide body. The saw depth adjustment bearing and the scoring depth adjustment bearing are preferably arranged separately from one another on the guide body.

The saw depth adjustment bearing and the scoring depth adjustment bearing have no common bearing components before geous.

A preferred measure provides that a cover wall is opposite the free longitudinal side of the guide body, the sawing tool and / or the scoring tool being arranged between the free longitudinal side of the guide body and the cover wall. The cover wall can, for example, form a part of the protective housing, which is described more clearly. But it can also be a separate cover wall. The cover wall serves, for example, to cover a sawing tool receiving space provided for receiving the sawing tool and / or a scoring tool receiving space provided for receiving the scoring tool. Transversely on the outside with respect to the longitudinal axis, the cover wall advantageously forms the outermost component of the hand sawing machine, so to speak, or the most transversely outside protruding component. It is advantageously provided that the cover wall forms a transverse side wall of the hand-held sawing machine, in front of which the guide body does not protrude transversely outward with respect to the longitudinal axis.

It is advantageous if the free longitudinal side of the guide body and an edge area of the opposite cover wall delimit an in particular slot-shaped recess open in the direction of the guide surface through which the sawing tool and / or the scoring tool can protrude in front of the protective housing and the guide surface . It is advantageous if the recess open in the direction of the guide surface is narrower than an operator's finger, e.g. narrower than 12 mm.

It is also advantageous if the cover wall on its edge region opposite the free longitudinal side of the guide body has an inclined wall section which is inclined with respect to the guide surface obliquely to the free longitudinal side of the guide body, for example in the sense of a narrowing of the aforementioned slot. Thus, this wall section close to the guide surface has a smaller transverse distance to the guide body than in an area further away from the guide surface, for example where the scoring tool holder and the saw tool holder require space to move in lower depth adjustment positions. Due to the inclined edge section or wall section, the operator has a better view of the workpiece in the area of the saw cut or the crack. In addition, it makes it easier to make miter cuts. The inclined edge section ensures a narrowing of the recess, which is open in the direction of the guide surface, so that the tool located behind it is difficult or impossible to access.

The cover wall can be an entirely closed wall. The cover wall consists for example of a non-transparent material. It is also possible for the cover wall to have transparent sections and / or cutouts. It is preferred if at least one viewing window is arranged on the cover wall, through which at least one part of the scoring tool and / or one part of the sawing tool is visible. The viewing window can be a permanently closed viewing window, for example viewing window closed by a transparent material, in particular transparent plastic. Thus, for example, access to a chip space, tools or the like is reliably prevented by the closed viewing window.

With regard to the arrangement of the at least one viewing window, there are various possibilities. For example, it can be or include a viewing window which is or includes viewing windows that are located away from the actual work area where the sawing tool or pre-scoring tool is in engagement with the workpiece. It is preferred, however, if the at least one viewing window is arranged on an edge region of the cover wall opposite the guide body, in front of which the sawing tool and / or the scoring tool protrudes in a sawing operation of the hand machine tool. Preferably, he extends the viewing window up to a plane parallel to the guide surface of the guide body. Thus, for example, an area can be viewed in which the scoring tool penetrates or cuts into the workpiece and / or in which the sawing tool comes out of the workpiece.

Individual viewing windows can be provided for the scoring tool and the sawing tool. However, it is preferably provided that the at least one viewing window has such a longitudinal extent that a section of the sawing tool and a section of the scoring tool opposite the sawing tool are visible through the viewing window. The viewing window can have parts of different sizes, namely, for example, a smaller part for the scoring tool, a larger part for the sawing tool.

The at least one viewing window can, however, also be a recess or opening that can be closed by a cover element. It is preferably provided that on the at least one viewing window a cover element movable between see an open position releasing the viewing window and a covering position covering the viewing window by means of a bearing, in particular a sliding bearing.

=== from 30653 === In the covering position, the cover element preferably covers a working area of the sawing tool and / or the scoring tool, in particular an exit area of the sawing tool or scoring tool from the workpiece, and releases it in the open position. From the cover element forms, for example, a protective cover. The cover element is preferably mounted on the cover wall by means of a sliding bearing. A swivel mounting or a combined swivel-slide mounting is easily possible. The work area is, for example, a viewing area or such an area that can be viewed advantageously by the operator when using the hand-held sawing machine or when making the saw cut or the crack, in particular for guiding the hand-held machine tool along the workpiece. The cover element can for example be opaque. However, it is advantageous if the cover element is completely or at least partially transparent or translucent so that the part or the work area of the sawing tool or scoring tool can be viewed through the cover element in its cover position. The cover element advantageously comprises a plate body or is formed by a plate body.

In principle, it is possible for the cover element to have, for example, a rectangular outer circumferential contour.

However, the cover element preferably has a stepped contour. For example, it is advantageous if the cover element has a scoring tool section for covering a section of the scoring tool and a sawing tool section for covering a section of the sawing tool. Both sections can be the same size or have the same linear expansion. However, it is advantageous if the scoring tool section and the sawing tool section un- Different surface expansions and / or length expansions, in particular in a length direction orthogonal to the guide surface and / or in a length direction parallel to the guide surface.

It is advantageous, for example, if the already explained cover wall forms part of a protective housing.

A preferred embodiment of the invention provides that at least one protective housing, in particular a protective hood, is arranged on the free longitudinal side of the guide body to accommodate a section of the sawing tool and / or scoring tool that does not protrude in front of the guide surface in the direction of the workpiece to be machined . Separate protective housings can be provided for the sawmill and the scoring tool. However, a common protective housing is preferred, in which the saw tool and the scoring tool are received or can be received.

The protective housing can be the component of the hand-held sawing machine that protrudes the furthest transversely to the longitudinal axis of the guide surface on the side of the sawing tool and / or scoring tool. For example, it is provided that the at least one protective housing protrudes transversely to the longitudinal axis of the guide surface in front of the free longitudinal side of the guide body. The guide body itself advantageously protrudes at least in the area of the sawing tool or the scoring tool transversely to the longitudinal axis of the guide body, advantageously over the entire length of the hand saw with respect to the longitudinal axis of the guide body, not in front of the at least one protective housing. For example, a part of the guide body can protrude transversely outwards in the direction of the protective housing, for example as an indicator for finding a scratch line or scratch mark.

Particularly in connection with a guide rail, the favorable arrangement of the sawing tool and scoring tool on the transverse outer side of the hand-held sawing machine results in very advantageous handling. It is preferred if a guide contour extending parallel to the longitudinal axis, in particular a guide receptacle or guide groove, is arranged on the guide surface for support on a counter-guide contour, in particular a guide projection or a guide rib, of the guide rail, so that the hand-held sawing machine moves along with respect to a feed the working direction is supported on the mating guide contour and the sawing tool and the scoring tool protrude past a longitudinal narrow side of the guide rail to the underside thereof. The longitudinal narrow side of the guide rail is therefore not covered by the guide body, at least in the area of the sawing tool and scoring tool, and is therefore freely visible to the operator.

It is advantageous if the hand-held sawing machine is arranged on the guide rail, the guide body does not protrude transversely to its longitudinal axis in front of the longitudinal narrow side of the guide rail and / or only a protective housing of the hand-held sawing machine accommodating the sawing tool or scoring tool is transverse to the longitudinal axis of the guide body protrudes in front of the longitudinal narrow side of the guide rail. In particular, this embodiment of the invention offers the advantage that the rail edge or longitudinal narrow side of the guide rail, but also the sawing tool and / or the scoring tool, are easily visible to an operator. The guide rail can be a retrofit component that is subsequently procured for the hand saw machine.

It is advantageous, however, if the hand saw machine includes the guide rail, this advantageously being a component separate from the hand saw machine, ie a component that can be detached from the hand saw machine. Furthermore, the guide rail can also be designed in the manner of a Kapp-rail, ie a guide rail on which the guide device is linearly displaceable to and fro along the working direction, but which can be operated using the aforementioned sliding bearing with the hand-held sawing machine is connected and with rear gripping contours on the guide surface is held with respect to the guide surface perpendicular force components.

It is also possible that the hand saw machine forms part of a system which includes the hand saw machine and the guide rail. It has already been explained that the saw tool holder and thus the saw tool and / or the scorer tool holder and thus the scorer tool are preferably adjustable in depth with respect to the guide surface. However, a miter adjustment is also preferred, for example as follows:

In the hand saw machine it is advantageously provided that the saw tool holder, in particular the saw unit as a whole, and / or the scoring tool holder, in particular the scoring unit as a whole, is pivotably mounted on the guide device using a miter bearing arrangement about a miter axis.

In principle, it is possible for the miter axis to be arranged at a transverse distance from the free longitudinal side of the guide body. However, it is preferred if the miter axis runs directly next to and parallel to the free longitudinal side of the guide body. It is preferred if the miter axis runs directly next to and / or directly above the free longitudinal side of the guide body. The aforementioned geometric arrangement offers the particular advantage that the guide body is not a hindrance when pivoting about the miter axis. The sawing tool and the scoring tool pivot, so to speak, around the free longitudinal side of the guide body.

It is furthermore advantageous if the saw depth adjustment bearing and / or the scoring depth adjustment bearing are arranged on a carrier designed in particular as a cover and / or protective housing, which is arranged between a front in the working direction and a rear in the working direction miter bearing of the miter bearing arrangement. The handling of the hand sawing machine is also facilitated by an effective dust removal. In particular, it is advantageous if the sawing tool and the scoring tool are kept as free as possible from dust, particles, chips or the like, at least in the field of vision, which is improved by the arrangement of the two tools on the long side of the hand machine tool. It is particularly advantageous if not only the saw unit, but also the scoring unit are provided with a dust discharge. In the case of the hand-held sawing machine, it is preferably provided that the scoring unit has a scoring dust removal device for removing particles that arise when the scoring tool is made into the workpiece.

It is a basic idea that dust removal takes place precisely in the area of the scoring unit, i. H. Particles that arise there are effectively conveyed away by the scoring tool so that a clean work area is available for the operator. The workpiece does not get dirty. The operator is not bothered by the dust. A work area in which the scoring tool penetrates the workpiece or emerges from the workpiece is easier to see if particles, dust and chips are removed by the scoring dust removal device.

In the following description, the terms dust and particles are used interchangeably. Dust is understood to mean particles, dust and sawdust.

In principle, it is possible for the scoring tool, in particular in an embodiment as a milling tool or the like, to be arranged freely on the guide device. However, it is preferred in the hand machine tool that it has a scoring tool receiving space for receiving the scoring tool, which is flow-connected to a dust removal connection particularly suitable and designed for connecting a suction hose, via the particles from the scoring tool receiving space can flow out. With regard to the sawing tool, too, it is advantageous if a receiving space is provided for receiving it. The hand sawing machine preferably has a sawing tool receiving space for the sawing tool.

The scoring tool receiving space and / or the sawing tool receiving space forms, for example, a dust space or protective space in which the scoring tool or sawing tool is received, in particular with its section not protruding in front of the guide surface for machining the workpiece. A section of the scoring tool or the sawing tool provided for processing the workpiece is in an active position in front of the respective receiving space.

The dust removal connection for the sawmill tool receiving space is preferably fluidly connected to the scoring tool receiving space via a dust removal channel. The dust removal channel can run in a protective hood or a protective housing of the hand saw machine, for example.

The dust removal connection for the sawing tool receiving space is preferably arranged in the working direction at the rear of the hand-held sawing machine.

The hand sawing machine advantageously has a cover wall for covering the sawing tool receiving space and / or the scoring tool receiving space, on which a viewing window is arranged through which at least one part of the scoring tool and / or the sawing tool is visible, with a cover element on the viewing window is movably mounted between an open position that exposes the viewing window and a covering position that covers the viewing window by means of a bearing, in particular a sliding bearing. In the covering position, the cover element preferably covers a working area of the sawing tool and / or the scoring tool, in particular an area where the sawing tool or scoring tool emerges from the workpiece, and releases it in the open position. The cover element forms a protective cover, for example. The cover element is preferably based on a sliding camp stored on the cover wall. A swivel mounting or a combined swivel-slide mounting is easily possible. The work area is, for example, a viewing area or such an area that can be viewed advantageously by the operator when using the hand saw or when making the saw cut or the crack, in particular for guiding the hand machine tool along the workpiece.

The cover element can for example be opaque. However, it is advantageous if the cover element is completely or at least partially transparent or translucent so that the part or the work area of the sawing tool or scoring tool can be viewed through the cover element in its cover position.

The cover element advantageously comprises a plate body or is formed by a plate body.

However, the cover element preferably has a stepped contour. For example, it is advantageous if the cover element has a scoring tool section for covering a section of the scoring tool and a sawing tool section for covering a section of the sawing tool. Both sections can be the same size or have the same length expansion. However, it is advantageous if the scoring tool section and the sawing tool section have different surface expansions and / or length expansions, in particular in a length direction orthogonal to the guide surface and / or in a length direction parallel to the guide surface. It is advantageous if the sawing tool receiving space and the scoring tool receiving space are separated from one another by at least one partition. The partition is, for example, between opposing sides, in particular narrow sides, of the scoring tool and the sawmill. The partition wall preferably extends as far as the guide surface, in particular when the sawing tool and / or the scoring tool are oriented orthogonally to the guide surface. The dividing wall preferably has a dividing wall section which, in particular, directly adjoins the guide surface. Both of these measures help ensure that the dividing wall separates the chip spaces from the scoring tool and the sawing tool directly in the area of the workpiece surface, i.e. where chips are produced.

At this point it should be mentioned that the scoring tool and the sawmill are preferably disc-shaped saw blades. The scoring tool and the sawing tool rotate in opposite directions during operation, d. H. that when a crack or a saw cut is made in the workpiece, they generate chips that are thrown towards each other. The at least one partition wall ensures that the chips generated by the sawing tool do not flow to the scoring tool and the chips generated by the scoring tool do not flow to the sawing tool.

The partition can be a one-piece partition. It is also possible that several partition walls are provided. A preferred exemplary embodiment provides that the at least one partition wall has a stationary partition wall section and a partition wall section that is movable relative to the stationary partition wall section. In principle, there may be a distance between the partition sections. However, it is advantageous if the Trennwandab sections are arranged side by side and in one or more, preferably each relative position, to each other, which is provided for a working operation of the Fland sawing machine, directly or in such a way to border or overlap each other so that they are a closed or essentially form a closed flow wall along which a particle stream containing particles generated by the scoring tool or the sawing tool can flow along. The flow wall can therefore be essentially or completely closed in any relative position that the partition wall sections can assume relative to one another. But it is also possible that the Trennwandab sections only form the flow wall when the Fland sawing machine is set for operation. So if for example the aforementioned Cover element is in the cover position, the partition wall sections form the flow-tight or substantially closed flow wall.

However, spaces, for example slots or gaps, between tween the partition wall sections are possible. Preferably, an interspace between the partition wall section is oriented and / or arranged in such a way that a particle flow is directed past the interspace and does not penetrate the interspace.

However, it is advantageous if the partition wall sections are designed to engage one another. For example, it is advantageous if one of the partition wall sections has an in particular U-shaped partition wall receptacle for engaging the other partition wall section when the movable partition wall section is adjusted towards the stationary partition wall section, and / or that the partition wall sections are designed telescopically.

It is particularly preferred if the movable partition wall section is arranged on the cover element. For example, the movable partition wall section protrudes at an angle from a cover section of the cover element which, in the cover position, covers the working area of the sawing tool and / or the scoring tool. The partition wall section is arranged, for example, between the sawing tool section and the scoring tool section of the cover element.

It is advantageous if the hand sawing machine has a flow guide surface, in particular an inlet slope and / or impact surface, arranged in particular on the partition, on or next to an exit area of the scoring tool from the workpiece. The flow guide surface lies opposite a narrow side of a disk-shaped scoring tool, for example.

It is furthermore advantageous if the saw unit has a saw-dust removal device for removing particles produced when the saw cut is introduced by the sawing tool. So are the chips, dusts and particles generated by the sawing tool can also be effectively removed from a work area of the sawing tool.

It is preferably provided that the saw dust removal device has a dust removal connection which is particularly suitable and designed for connecting a suction hose and which is flow-connected to the saw tool receiving space so that particles can flow out of the sawing tool receiving space via the dust removal connection. Thus, particles can flow out of the sawing tool receiving space and the scoring tool receiving space via a single dust removal connection, for example can be sucked off.

This dust removal connection, which is flow-connected to the sawing tool receiving space, is advantageously also fluidly connected to the scoring tool receiving space, so that particles generated by the scoring tool can flow out of the scoring tool receiving space via the dust removal connection.

The dust removal connection fluidly connected to the sawing tool receiving space can also be a dust removal connection separate from a dust removal connection fluidly connected to the scoring tool receiving space. The hand sawing machine thus has two dust removal connections, namely for the sawing tool receiving space and the scoring tool receiving space.

The dust removal connection for the scoring tool receiving space and / or for the sawing tool receiving space comprises, for example, a tubular body and / or connecting piece to which a suction hose can be plugged. The suction hose leads, for example, to a particularly mobile vacuum cleaner, in particular to a workshop vacuum cleaner, or is part of the vacuum cleaner. The suction hose can also be part of a stationary suction system. A form-fitting contour for the form-fitting connection of the suction hose or a connection piece of the suction hose is preferably provided on the dust removal connection. The pipe body or connection piece can be rotatably mounted on the hand machine tool, so that the pipe body or connecting piece connected suction hose is rotatable relative to the hand sawing machine.

It is advantageous if the dust removal connection fluidly connected to the sawing tool receiving space is fluidly connected to the sawing tool receiving space via a dust removal duct, the dust removal duct at least in sections from a dust removal duct fluidly connected to the scoring tool receiving space, in particular at an outlet area. at which the scoring tool and the sawing tool emerge from the workpiece, is separated by a partition. The partition can be a very short partition. It is advantageous, for example, if the partition only extends up to the sawmill-receiving space.

It is also possible for the partition wall to extend along the sawmill-receiving space up to the dust removal connection, so that particle flows generated by the sawing tool and the scoring tool are only mixed with one another on the outflow side in the area of the dust removal connection.

The sawing tool receiving space and the scoring tool receiving space are advantageously provided in a common protective housing for receiving the sawing tool and the scoring tool. It is also possible that separate protective housings are provided for the sawing tool and the scoring tool.

It is also advantageously provided that the saw tool holder, in particular the saw unit as a whole, is movably mounted on or with respect to the guide device by means of a saw depth adjustment bearing between an upper depth adjustment position and at least one lower depth adjustment position, the sawing tool in the lower depth adjustment position protrudes further in front of the guide surface than in the upper depth adjustment position. Thus, for example, saw cuts of different depths can be made in the workpiece. It is further preferred if the scoring tool holder, in particular the scoring unit as a whole, on or with respect to the guide device using a scoring depth adjustment bearing separate from the saw depth adjustment bearing between at least one active position in which the scoring tool arranged on the scoring tool holder is in front the guide surface protrudes and is movably mounted in an inactive position in which the scoring tool is moved back behind the guide surface. Thus, the scoring tool can, for example, be moved to the inactive position when no scoring is to be made.

The scoring tool and / or the sawing tool are preferably designed as a saw blade, in particular a circular saw blade. In principle, however, it would also be possible for the sawing tool to be, for example, a jigsaw blade or a similar saw blade of a non-circular type. Furthermore, the scoring tool can, for example, also comprise a milling head or a milling tool or be formed thereby.

An embodiment of the sawing tool and scoring tool as a saw blade is preferred. An advantageous embodiment provides that the ratio of an outer diameter of the sawing tool to an outer diameter of the saw drive motor is greater, in particular at least 1.5 times greater, preferably twice greater, more preferably at least 2.5 times greater than a ratio of the outer diameter of the scoring tool to an outer diameter of the scoring drive motor.

The Fland sawing machine is a sawing machine that is manually guided along the workpiece. The machine can be guided freely over the workpiece, ie operated without a guide rail. However, operation with a guide rail is preferred. The Fland machine tool is preferably a plunge-cut saw and / or has no protective cover for a section of the sawing tool and / or the scoring tool that protrudes freely in front of the guide surface. The saw unit and the scoring unit are arranged on an upper side of the guide device opposite to the guide surface. The guide device includes, for example, a so-called saw table. The guide device or the guide body preferably comprises a plate body, on one side of which the guide surface and on whose side or top side opposite the guide surface the saw unit and the pre-scoring unit are arranged. On the guide surface Füh approximately recordings, for example longitudinal grooves or the like, pen for guide ribs or guide projections of a guide rail are arranged. The saw drive motor and / or the scorer drive motor are preferably electric motors, in particular universal motors or brushless, electronically commutated motors or DC motors. Different types of motors can be used as the saw drive motor and scorer drive motor, for example an electronically commutated motor as the saw drive motor and a DC motor as the scorer drive motor.

An exemplary embodiment of the invention is explained below with reference to the drawing. Show it:

Figure 1 is a perspective oblique view from the front of a hand sawing machine with a saw unit and a scoring unit in an upper depth adjustment position,

Figure 2 shows the hand sawing machine according to Figure 1, but in a lower depth adjustment position,

Figure 3 shows the hand saw machine according to Figures 1, 2 on a guide rail in a miter position and seen obliquely from the rear, Figure 4 shows a detailed view of Figure 3 from the front of a lower part of the hand saw machine and the guide rail, with a guide body the hand machine tool and the guide rail engage with one another with additional rear gripping contours, 5 shows a variant of the hand sawing machine according to the preceding figures with a scoring unit that can be pivoted separately from the sawing unit about a miter axis or a scoring unit that is stationary with respect to the miter axis, FIG. 6 shows a side view of the hand sawing machine according to FIG Saw unit in an upper depth setting position,

FIG. 7 shows a right-hand part of the view according to FIG. 6, the saw unit being adjusted to a lowest depth setting position, but the scoring unit being inactive,

8 shows the view according to FIGS. 6, 7, but with the saw unit moved into a lowest depth setting position and the scoring unit moved into an active position,

FIG. 9 shows the view according to FIG. 8, but with the saw unit displaced into a scoring-depth setting position only and the scoring unit displaced into the active position,

FIG. 10 shows a scoring-only depth stop device in a release position, which enables the saw unit to be adjusted according to FIG. 8, as a detail D2 of the hand-held sawing machine shown as a whole in FIG.

FIG. 11 shows the only scoring depth stop device according to FIG. 10, but in its stop position, which corresponds to a scoring only depth setting position of the saw unit,

FIG. 12 shows a detailed view of the scoring unit, obliquely from the front, approximately from the viewing direction of FIG. FIG. 13 scoring unit according to FIG. 12, but from the rear at an angle, roughly corresponding to the viewing direction in FIG. 3, in an activation position,

14 shows the view of the scoring unit according to FIG. 13, the scoring unit being adjusted to a deactivation position,

FIG. 15 shows a section through the scoring unit according to FIG. 13, approximately along a section line A-A through its deactivation device,

16 shows a view obliquely from the front of the scoring unit of the Fland sawing machine according to FIG. 1, FIG. 17 shows a partial section through the scoring unit according to FIG illustration of the detail D3 shown in Figure 17 is shown,

FIG. 18 side view of the Fland sawing machine according to the preceding figures with the protective housing open, roughly corresponding to the view according to FIG. 6,

19 shows a cover of the protective housing obliquely from the front, approximately in the perspective according to FIG. 1,

FIG. 20 a view similar to FIG. 18 of a variant of the Fland sawing machine,

FIG. 21 shows a further variant of the Fland sawing machine from the side, roughly corresponding to the viewing direction BR1 in FIG. 1,

FIG. 22 shows the Fland sawing machine according to the preceding figures, obliquely from the front, the protective housing being closed with the cover according to FIG. 19, FIG. 23 shows a front detail D4 of the view according to FIG. 22 with a cover element displaced into an open position,

24 shows the view according to FIG. 23, but with the cover element moved into a cover position, FIG. 25 shows a partial area of the cover according to FIG. 19 with the cover element moved in the open position, corresponding to the partial view according to FIG. 23,

FIG. 26 is a view according to FIG. 25, but with the cover element displaced in the covering position, FIG. 27 shows the Fland sawing machine according to FIG. 1 at an angle from the rear to illustrate a scoring Fland handle body,

FIG. 28 the Fland sawing machine according to FIG. 27 obliquely from the front, FIG. 29 a variant of the Fland sawing machine according to FIG. 27 with an additional scoring Fland grip body, FIG. 30 the Fland sawing machine according to FIG. 29 obliquely from the front,

FIG. 31 shows a side view of the Fland sawing machine according to the preceding figures with a safety device in a safety position,

FIG. 32 is a perspective oblique view of the safety device of the Fland sawing machine according to FIG. 31, FIG. 33 is a schematic view of the Fland sawing machine according to the preceding figures from the side,

FIG. 34 shows a variant of the Fland sawing machine according to FIG. 33 with a different driving device, FIG. 35 shows a schematic view of a hand sawing machine with a manually and individually operated scoring unit,

36 shows a hand sawing machine with a scoring unit which is adjustable by motor, FIG. 37 a hand sawing machine with a scoring unit that can be manually operated via a power transmission element,

38 shows a variant of the scoring unit with alternative scoring depth adjustment means and an alternative deactivation device in a perspective oblique view in a deactivation position, FIG. 39 the scoring unit according to FIG. 38, but in the activation position,

FIG. 40 shows a section along a section line C-C in FIG. 39 through the scoring unit,

FIG. 41 an exploded view of the scoring unit according to FIGS. 38-40, FIG. 42 a scoring tool with four scoring teeth,

FIG. 43 shows a system comprising the scoring tool according to FIG. 42 cut along a section line D-D and a sawing tool,

FIG. 44 shows a detail D5 from FIG. 43,

FIG. 45 shows the scoring tool according to FIG. 42 in an oblique perspective,

FIG. 46 a scoring tool with three scoring teeth,

FIG. 47 a scoring tool with one scoring tooth, alternatively with two scoring teeth, FIG. 48 shows another embodiment of a scoring tooth of a scoring tool, roughly corresponding to detail D5 according to FIG. 44, with mutually angled secondary cutting edge sections,

49 shows an alternative embodiment of a scoring tooth, for example in the manner of the scoring tooth according to FIG. 48, but with concave secondary cutting edges

FIG. 50 shows a further embodiment of a scoring tooth with convex secondary cutting edges, and

FIG. 51 a sawing tool from the side. A face saw machine 10 is designed for example in the manner of a plunge-cut saw, but could also, for example, have a pendulum hood or the like on other protective cover and thus be a pendulum hood saw.

The face saw machine 10 has a saw unit 11 with a saw drive motor 12, which is received in a motor housing part 28 of a saw unit housing 13. The saw drive motor 12 drives a saw tool holder 14 directly or via a gear mechanism not visible in the drawing, on which a saw tool 15 can be or is arranged. For example, a folding screw or a folding element 14A is used to fold the saw tool 15 on the saw tool holder 14. Using a saw depth adjustment bearing 16, the saw unit 11 can be pivoted as a whole about a depth adjustment axis TS with respect to a guide device 17 on which the saw unit 11 is arranged . Such a pivoting movement allows the sawing tool 15 to be set between an upper depth setting position OT and several lower depth setting positions, for example a lowermost depth setting position UT according to FIG. 2 or 8. In the lower depth setting positions UT, the sawing tool 15 is in front of a guide surface 19 of a guide body 18 the guide device 17 before, for example, to make a saw cut in a workpiece W. With the guide surface 19, the guide body 18 and thus the Fland sawing machine 10 as a whole can be guided, for example, directly along a workpiece upper side WO of the workpiece W in a working direction AR. The guide surface 19 extends with a longitudinal axis L parallel to the working direction AR.

The guide body 18 can also, for example, be guided along an upper side or guide surface 202 of a guide rail 200, the lower side 201 of which can be placed on the workpiece W. As a result, exact and straight saw cuts can be made in the workpiece W FITS. The guide rail 200 has a longitudinal shape with longitudinal narrow sides 203, 204 extending along a longitudinal axis LS of the guide rail 200, along which the working direction AR is oriented, between a rear end face 207 in the working direction AR and a front end face 208 in the working direction AR The sawing tool 15 can dip into the workpiece W past 204.

A counter-guide contour 206 in the form of a longitudinal rib and optionally a receiving groove 205 also extend parallel to the longitudinal axis LS. The receiving groove 205 is used, for example, to receive aids, clamping devices for clamping the guide rail 200 or the like. The longitudinal rib or guide contour 206 projects upwards in front of the guide surface 202 and serves to engage a guide contour 216 on the guide surface 19 of the guide body 18. The guide contour 216 is, for example, an elongated receptacle extending along the longitudinal axis L of the guide body 18 menut 217. An alternative embodiment of the guide rail 200 is shown schematically, for example, in the form of the guide rail 200A. The guide rail 200A has a rear engaging projection 210 which protrudes in front of the guide surface 202 and from which at least one rear engaging leg 211, preferably two opposing rear engaging legs 211, protrude laterally, for example, form a T-shaped structure. The rear gripping legs 211 engage in a receptacle 220 which is optionally provided on the guide surface 19 and which has rear gripping receptacles 221. For example, support legs 222 are in the plane of the guide surface 19 in the direction of the receptacle 220, which can be grasped from behind by the rear gripping legs 211 that engage in the rear gripping 221. As a result, the guide device 17 is held on the guide rail 200A in a force direction perpendicular to the guide surface 18, but is nevertheless displaceable along the guide rail 200A in the working direction AR. The receptacle 220 and the rear engagement projection 210 have a longitudinal shape and run in the direction of the longitudinal axes L and LS, respectively.

The guide body has a longitudinal side, hereinafter referred to as the tool longitudinal side 18A, on which the sawing tool 15 is arranged, as well as a, so to speak, tool-free longitudinal side 18B, which runs parallel to the longitudinal side 18A and, like this, lies between a front and a rear end face 18C, 18D of the guide body 18 extends.

The saw unit 11 is on a guide surface 19 opposite top 19A of the guide device 17 or the guide body 18 is arranged. The guide body 18 is formed ge for example by a guide plate or is plate-like. While the guide surface 19 is essentially a flat surface, apart from receiving contours arranged thereon, in particular, for example, the receptacle 220 and / or guide contour 216, the upper side 19A can carry functional components and / or be reinforced by a rib structure. Among other things, it is possible for an operator to grasp and / or actuate the upper side 19A to guide the hand-held sawing machine 10, in particular in the area of a handle part 18F close to the front face 18C, for example around the front section of the guide body 18 a direction of force perpendicular to the guide surface 19 in the direction of the workpiece W or the guide rail 200. The handle part 18F can, for example, be or comprise a flat surface. The hand grip part 18F advantageously has a recessed grip. However, the handle section 18F can also be For example, comprise a grip element 218, for example a rod-shaped or toggle-shaped handle.

The saw unit 11 is acted upon as a whole by means of a saw unit spring arrangement 20 in the direction of the upper depth setting position OT. The saw unit spring arrangement 20 comprises, for example, a helical spring 20 A. The helical spring 20A or spring arrangement 20 is located on the one hand on the upper side of the 19A of the guide device 17, on the other hand on the underside of the saw unit housing 13.

In addition to the depth adjustability around the depth adjustment axis TS, the saw unit 11 can also be pivoted around a miter axis G.

The hand sawing machine 10 has a carrier 40. The carrier 40 comprises a protective housing 29. The saw unit 11 is held on the carrier 40.

The carrier 40 and / or the protective housing 29 is pivotably mounted on the guide device 17 about the miter axis G, which runs parallel to the longitudinal axis L of the guide device 17, namely by means of a front miter bearing 21 in the working direction AR and a rear miter bearing 23 in the working direction Miter bearing arrangement 21 A. The miter bearings 21, 22 are arranged close to or immediately next to the front and rear end faces 18C, 18D of the guide body 18, so they form the foremost and rearmost component of the hand sawing machine 10, so to speak, in the working direction AR.

The miter bearings 21, 22 each comprise a bearing base 23, in particular in the form of a plate, which projects upwards from the top 19A of the device 10, and on which a bearing body 24, also preferably as a plate, can be pivoted about the miter axis G. is stored. The miter bearings 21, 22 can be fixed in several pivot positions with respect to the miter axis G by means of fixing means 25. The fixing means 25 include, for example, a clamping screw 25A, with which the bearing base 23 and the bearing body 24 can be acted upon in a clamping position towards one another, so that they are non-positively and / or frictionally and / or positively, for example based on interlocking teeth, held together and fix the carrier 40 in a set angular position with respect to the miter axis G on the guide device 17.

As an alternative to the concept of the carrier 40, on which the saw unit 11 and the scoring unit 31 are arranged so that they can be rotated simultaneously about the miter axis G using the miter bearing arrangement 21 A, a concept is also possible in which the scoring unit 31 is independently of the saw unit 11 by the miter axis G can pivot. For this purpose, for example, a miter bearing 22A is present between a scoring unit 31A corresponding to the scoring unit 31 and the sawing unit 11, as in the embodiment of the hand-held sawing machine 10A according to FIG. It is of course advantageous if this miter bearing 22A, like the miter bearings 21, 22, can be fixed by a fixing means 25, for example by a clamping screw, so that the relative position of the saw unit 11 and the scoring unit 31 with respect to the miter axis G can be fixed.

The embodiment according to FIG. 5 can, however, also provide that the saw unit 11 can pivot about the miter axis G, but the pre-scoring unit 31 A is arranged stationary with respect to the guide device 17 with respect to the miter axis G. In this case, too, the miter bearing 22A between the scoring unit 31 and the saw unit 11 is seen advantageously before.

The carrier 40 comprises the protective housing 29 with a sawmill receiving space 48 for receiving the sawing tool 15. The sawing tool 15 is received in the sawing tool receiving space 48 such that it can pivot about the depth adjustment axis TS, although in the upper depth adjustment position OT it is not in front of the sawing tool -Receiving space 48 protrudes, but in the lower Tiefeneinstellpositionen, for example the lowermost Tie feneinstellposition UT a maximum of far in front of the protective housing 29 and the guide surface 19 protrudes. The saw tool holder 14 is rotatably driven by the saw drive motor 12 about a tool axis of rotation DS with a direction of rotation such that the saw tool 15 cuts into the workpiece W from its underside WU and produces a saw cut SAE. The sawing tool 15 is a saw blade, the teeth of which are inclined and driven in a direction of rotation towards the guide surface 19, so that the teeth can lead to the formation of cracks when they emerge from the upper side of the workpiece WO. To prevent this problem, the hand sawing machine 10 has a scoring module 30.

The scoring module 30 comprises a scoring unit 31 which is arranged in front of the sawing unit 11 in the working direction AR. The scoring unit 31, like the sawing unit 11, is arranged on the carrier 40. A scorer drive motor 32 drives a scorer tool holder 34 about a tool axis of rotation DV, but with an opposite direction of rotation compared to the direction of rotation of the tool axis of rotation DS. The scorer drive motor 32 forms a scorer drive 32A.

A scoring tool 35, for example a scoring saw blade, can be releasably attached to the scoring tool holder 34, in particular by means of a retaining element 34A, in particular a retaining screw. The scoring tool 35 is driven in a direction of rotation that its teeth cut into the workpiece W from its workpiece top side WO and produce a scratch RI that is in alignment with a saw cut that is then made in the workpiece W by the sawing tool 15. The crack is slightly wider than the later saw cut, so that the sawing tool 15 does not affect the longitudinal edges of the crack and thus no or less crack formation, no or little tearing of chips or the like occurs on the workpiece top WO.

A scoring unit housing 33, in which essential components of the scoring unit 31 are accommodated in a protected manner, is arranged on the carrier 40. Thus, the scoring unit housing 33 is stationary with respect to the carrier 40 and also with respect to the protective housing 29, while the movable components of the scoring unit 31, including the scoring drive motor 32, a gear between the scoring drive motor 32 and the scoring tool holder 34 etc. are movably received in the interior of the scoring unit housing 33. The scoring drive motor 32 is advantageously accommodated in a motor housing 33A separate from the scoring unit housing 33. The motor housing 33A is movable relative to the scoring unit housing 33.

The scoring unit 31 comprises a scoring carrier 80, which is mounted on the carrier 40 about a depth setting axis TV by means of a scoring depth adjustment bearing 36. The scoring tool holder 34 is also received in the interior of the protective housing 29, namely in a scoring tool receiving space 49 of the same.

The scoring carrier 80 has, for example, a block-like or cuboid shape. The scoring carrier 80 has a longitudinal shape, for example. A longitudinal axis of the scorer carrier 80 or the scorer carrier 80 as a whole is, for example, inclined at a flat angle with respect to the guide surface 19, depending on its respective pivot position with respect to the depth adjustment axis TV, or in some pivot positions with respect to the depth adjustment axis TV parallel to the guide surface 19 .

The scoring carrier 80 comprises a bearing section 81 on opposite longitudinal end regions, which is mounted on the scoring Tiefeneinstelllager 36 around the Tie feneinstellachse TV, and a motor section 82 with a motor receptacle 83 on which the scoring drive motor 32 is held. Between the scorer drive motor 32 and the scorer tool holder 34, a gear 84 can be arranged, for example a stepped gear or the like. For example, it is possible that the tool axis of rotation DV and a motor axis of rotation DM of the scorer drive motor 32 have a transverse spacing from one another due to the gear 84. For example, the motor axis of rotation DM is at a greater distance from the guide surface 19 than the tool axis of rotation DV, which is therefore very close to the guide surface 19. This makes it possible, for example, for the scoring drive motor 32 to have a larger diameter Generation of a correspondingly greater torque than in the case of a type in which its motor axis of rotation and the tool axis of rotation DV are aligned with one another.

To operate the saw tool holder 14 between the upper Tiefenein adjusting position OT and one of the lower Tiefeneinstellpositionen UT, the saw unit 11 is to pivot as a whole about the depth adjustment axis TS. For this purpose, an operator can take handles 26 and / or 27 arranged on the saw unit housing 13, for example. The handle 26 is arranged in the working direction AR at the rear of the saw unit 11, the handle 27 on a front in the working direction AR of the saw unit housing 13 on the saw unit 11 is arranged. Both handles 26, 27 have a longitudinal shape. The handle 26 has a longitudinal axis L 26 which runs essentially parallel to the longitudinal axis L of the guide device 17, while a longitudinal axis L27 of the handle 27 runs transversely to this longitudinal axis L. The operator can thus generate a torque about the depth adjustment axis TS, for example by pressing the handle 27, whereby the saw tool holder 14 pivots about the depth adjustment axis TS and the saw tool 15 is moved in front of the guide surface 19.

The handle 27 at the same time forms an actuating element 27A with which an operator can not only actuate the saw unit 11 or the saw tool holder 14 between their depth setting positions, but also the scoring unit 31. The actuating element 27A, that is to say an actuating handle 27B, acts via a driver device 70 on the scoring unit 31 to adjust it between an active position AP, in which the scoring tool 35 protrudes in front of the guide surface 19, and an inactive position IP, in which the scoring tool 35 is behind the guide surface 19 is adjusted back or in any case does not protrude in front of it.

In the direction of the inactive position IP, the scoring carrier 80 and thus the scoring tool holder 34 are loaded by a scoring unit spring arrangement 39. In the opposite direction, i.e. in the active position AP, however, the take-away device 70 with the scoring unit 31 when the saw unit 11 is actuated from the upper depth adjustment position OT in the direction of the lower depth adjustment position UT. Thus, when moving the hand-held sawing machine 10 into a lower depth setting position or sawing position, an operator works against the two spring arrangements 20, 39, so to speak, in order to move both the sawing tool 15 and the scoring tool 35 into a working position or sawing position that engages the tool W. In the opposite direction, so to speak into the inactive position or safe position, the two spring arrangements 20, 39 act, both of which act in a safe sense, namely in one sense of moving the sawing tool 15 and the scoring tool 35 back behind the guide surface 19.

The entrainment device 70 comprises an actuator 71 on the Sägeaggre gat 11, which acts on an actuator 72 of the scoring unit 31. The actuator 71 is designed as a link guide 73 and comprises a guide link 74 on which a link follower 75, for example a roller or a feeler roller, of the scoring unit 31 is guided along, for example rolls along. The actuating transmitter 71 and the actuating slave 72 are advantageously arranged outside the protective housing 29.

The guide slot 74 comprises a scorer activation section 76 and a scorer holding section 77, between which an apex 76A is arranged. The scoring holding section 77 of the guide slot 74 or slot track runs in a radius R around the depth adjustment axis TS. In contrast, the scoring activation section 76 runs at an angle to the scoring holding section 77 in any case such that the link follower 75 guided along the holding section 77 actuates the scoring unit 31, in particular the scoring support 80, in such a way that the Scoring tool holder 34 and thus the scoring tool 35 is actuated from the inactive position IP along a movement path BB in the direction of the active position AP.

The scoring activation section 76 is designed in such a way that when the saw tool holder 14 is moved out of the upper depth setting position OT in the direction of the lower depth setting position UT, the scoring tool 35 is advanced. hastily adjusted in front of the sawing tool 15 from the inactive position IP to the active position AP, in which it protrudes with a preferably adjustable maximum penetration depth or scratch depth Rmax for engaging the workpiece W in front of the guide surface 19. The scoring depth Rmax or the active position AP is already set or adjustable when the saw tool 15 or the saw tool holder 14 or the saw unit 11 assumes a depth setting position RT in which the saw tool 15 does not yet protrude in front of the guide surface 19. This setting of the Fland sawing machine 10 relates to a pure scoring operation or scoring operation, in which only the scoring unit 31 or scoring tool 35 is used to make a scoring in the workpiece W.

A scoring-only depth stop device 78 is provided so that the operator does not have to balance the saw unit 11 in this pure scoring operation or pre-scoring operation in the depth setting position RT von Fland, so to speak. This includes a movable, for example sliding, stop member 79 mounted on the saw unit 11, which can be adjusted between a stop position TA, in which it strikes a counter-stop 79A, which is arranged on the protective housing 29, and a release position TF, in which the stop member 79 at the counter stop 79A can be moved over to the Sägeaggre gat 11 and thus the saw tool holder 14 from the Ritz-Tiefeneinstellposition RT further in the direction of one of the lower Tiefeneinstellen positions UT, in which the sawing tool 15 in front of the guide surface 19 to cut into the workpiece W protrudes. For example, the stop member 79 is mounted on the motor housing part 28 or saw unit housing 13 so as to be displaceable transversely to the longitudinal axis L. The stop member 79 is advantageously close to the handle 26, in particular to its upper area furthest from the guide device 17, so that an operator grasping the handle 26 with his thumb reaches the stop member 79 in an unspecified sliding guide between the stop position TA and the release position TF can operate. A main switch actuating element 60 for actuating a main switch 60A with which the saw drive motor 12 and the scorer drive motor 32 can be switched on and off is also arranged on this upper area of the handle 26, or one furthest away from the guide device 17.

The hand saw machine 10 can be connected, for example, using a connection line 67 to an electrical power supply network, for example an alternating voltage network with 120 V, 230 V or the like, for the electrical energy supply of the drive motors 12, 32 and other electrical components of the hand saw machine 10.

As an alternative or in addition to the supply via an electrical energy supply network, an electrical energy store 67D, for example an accumulator, can also be provided for supplying energy to the saw unit 10 and / or the scoring unit 31.

A connecting line 68 is provided for supplying power to the scoring unit 31 through the saw unit 11. The connecting line 68 is connected to connector sections 68A, 68B at its longitudinal ends on the one hand with the saw unit 11 and on the other hand with the scoring unit 31. An arcuate connecting section 68C or arcuate section extends between the connection sections 68A, 68B.

However, it is also possible that the scoring unit 31 can be supplied with electrical energy by means of an electrical energy storage device 68D arranged, for example, on or in the scoring unit housing 33.

The connecting section 68C extends from the longitudinal ends 68A, 68B in an arc shape in the direction of the protective housing 29, so that there is an interspace between the longitudinal ends 68A, 68B that is ideally suited for operating components of the scoring unit 31.

In particular, a scorer handle body 37 is through the space between tween the connection sections 68A, 68B or the interior of the connector Access section 68C with which an operator can exert an actuating force in the direction of the guide surface 19 in the area of the scoring unit 31. The scorer handle body 37 has a handle surface 37A, which is provided in particular on a top wall 38 of the scorer unit housing 33. The scoring unit housing 33 namely forms the scoring handle body 37.

A recessed grip 37B and a flat surface 37C are provided on the handle surface 37A. Above the recessed grip 37B there extends a grip hump 37D which, for example, has an outer circumferential contour that fits into the palm of an operator's hand.

The housing 33 also has a side wall 38A, which extends next to the longitudinal side 18B of the guide body 18, and a front wall 38B, which extends parallel to the front end face 18 of the guide body 18.

Since the housing 33 of the scoring unit 31 is fixedly arranged on the carrier 40, it does not pivot about the depth adjustment axis TV, but is fixed to pivot with respect to the depth adjustment axis TV. Thus, an operator can support himself to guide the hand-held sawing machine 10 in the working direction AR on the housing 33, in particular its top wall 38, and exert a force in the direction of the guide surface 19 and / or in the working direction AR on the hand-held sawing machine 10 . For support on the upper side 19A of the guide body 18, the housing 33 has a support part 38D.

The housing 33 is advantageously designed ergonomically. For example, the top wall 38 is inclined obliquely backwards at a small angle with respect to the working direction AR, so that the operator can exert an operating force in the working direction AR to the front on the housing 38 and thus the hand sawing machine 10. The top wall 38 or the housing 33 advantageously has a handle hump 38C. The handle bump 38C is also suitable for the scorer drive motor 32 to be received below it. The operator can contact the Support grip bump 38C or, for example, grip it with the palm of the hand. This results in a particularly ergonomic operating concept.

A schematically indicated operator BE can therefore grip the handle 26 with one hand, for example to guide the hand sawing machine 10, in order to also operate the main switch 60 and the actuating element 61 A with this hand, and optionally either the handle 27 with his other hand grab what is shown as a hand position H1 in FIG. 28, or are supported on the scorer handle body 37 or housing 38, which is shown as hand position H2.

An alternative operating concept or an operating concept provided in addition to the handle 37 provides an additional scorer handle body 337. The handle body 337 is, for example, rod-shaped and has a handle surface 337A for the operator BE to grip around. The handle body 337 is attached to the protective housing 29 by means of a carrier 337B and protrudes therefrom in the direction of the scoring unit 31.

The scoring unit 31 is arranged between the handle body 337 and the guide body 18, with a gap Z being present between the handle body 337 and the top of the housing 33 of the scoring unit 31 facing away from the guide body 18, through which an operator can grip the handle body 337 can.

Both handle bodies 37 and 337 extend along a longitudinal axis L38 transversely to the longitudinal axis L of the guide body 18, in particular at right angles transversely. Both handle bodies 337 and 37 preferably extend to the long side 18B of the guide body 18 without tools, so to speak. Both handle bodies 37 and 337 preferably extend over essentially the entire transverse width of the guide body 18 from the long side or narrow side 18B in the direction of the long side 18A which the tools 15, 35 are arranged so that they provide the operator with an ergonomic support for guiding the hand-held sawing machine 10. Furthermore, the saw unit 11 or the saw tool holder 14 can be locked in the upper depth setting position OT by means of a locking device 61. An actuating element 61 A of the locking device 61, designed for example as a pressure actuating element, is arranged on the upper part of the handle 26 or furthest away from the guide device 17. By actuating the actuating element 61A, this can be disengaged from an abutment contour 61 B, for example, the rear engagement contour, so that the saw unit 11 is unlocked for adjustment from the upper depth setting position OT into one of the lower depth setting positions UT or the scoring depth setting position RT.

The scoring depth setting position RT and other lower depth setting positions UT can also be set using a saw depth setting device 62 of the hand sawing machine 10. The saw depth adjustment device 62 comprises a depth stop guide 63 which extends in an arc shape around the saw depth adjustment bearing 16.

It is advantageous if, in addition to the depth stop guide 63, the guide slot 74, which also extends arcuately around the depth adjustment axis TS, at least in the area of the scoring activation section 76, is arranged.

On the depth stop guide 63, a depth stop 64 is adjustably mounted in various depth adjustment positions, for example displaceably. The depth stop guide 63 comprises, for example, a guide groove, a guide slot or the like. By means of a fixation 65, for example a latching fixation, a jamming or the like, the depth stop 64 can be fixed in a stationary manner with respect to the depth stop guide 63. At the movable about the depth adjustment axis TS saw unit 11 is a stop body 66 is arranged, which faces in the direction of the depth adjustment stop 64 and strikes this in the depth adjustment position set by it. The scoring unit 31, in particular its scorer carrier 80, is mounted on the carrier 40 pivotable about the miter axis G so that it can pivot about the depth adjustment axis TV by means of the scorer depth adjustment bearing 36. The scoring depth adjustment bearing 36 comprises a bearing base 86 which is fastened to the carrier 40. The bearing base 86 comprises a support plate 86A, for example a flange or flange body, from which an axle member 86B protrudes. The support plate 86A is fastened to a base wall 29A of the protective housing 29 with screws 86C, so that the axle member 86B protrudes from the base wall 29A.

A bearing sleeve 86E is arranged on the outer circumference of the axle member 86B, on the outer circumference of which a bearing member 86F is in turn arranged. The bearing sleeve 86E thus engages in a bearing receptacle of the bearing member 86F, so that the bearing member 86F is mounted pivotably about the depth adjustment axis TV by means of the bearing sleeve 86E. The bearing member 86F is, for example, firmly connected to the Vorrit zer support 80, for example taken up in a receptacle thereof.

The bearing sleeve 86E is an option that improves the rotatability or pivotability about the depth adjustment axis TV. In addition, the bearing sleeve 86E improves the longitudinal displaceability of the scoring support 80 and thus the scoring unit 31 with respect to a transverse adjustment axis QS, around the scoring tool holder 34 with respect to the sawing tool holder 14 and thus with the scoring tool 35 with respect to the sawing tool 15 to adjust aligned axis line so that the scoring made by the scoring tool 35 is aligned with the saw cut made by the sawing tool 15. It is advantageous that the transverse adjustment axis QS corresponds to the depth adjustment axis TV at the same time.

A transverse adjustment device 87 is used to adjust the scoring tool holder 34 with respect to the transverse adjustment axis QS. The transverse adjustment device 87 comprises, as an actuator 87A, for example an adjusting screw, the head of which represents an actuating element 87B. On the actuating element 87B, for example, a corrugation or the like, other to the loading diener BE the operation facilitating handle should be provided. A screw portion 87C engages in an adjusting receptacle 86D of the axle link 86B and is screwed to this. Thus, by turning the adjusting screw or the adjusting member 87A, the position of the actuating element 87B can be adjusted along the transverse adjustment axis QS. The screw portion 87C is thus, so to speak, screwed into or unscrewed from the actuating receptacle 86D.

The actuating element 87B projects in front of the axle member 86B with a projection projecting radially in front of the transverse adjustment axis QS, for example a flange projection, so that the bearing sleeve 86E and / or the bearing member 86F can be supported on this projection. Thus, the actuating element 87B takes the bearing member 86F with it when the screw section 87C is screwed into the adjusting receptacle 86D in the direction of the support plate 86A of the bearing base 86 along the transverse adjustment axis QS and thus adjusts the scoring tool receptacle 34 in a sense from the longitudinal tool side 18A of the guide body 18 way. A spring 86H acts in the opposite direction to this adjusting direction, which is supported on the one hand on the support plate 86A and on the other hand on the bearing member 86F and thus acts with a force in the direction of the actuating element 87B. The spring 86H engages in a spring receptacle 86G of the bearing member 86F, which is designed, for example, as a circumferential groove that extends around the transverse adjustment axis QS. The spring 86H is penetrated by the bearing member 86F, the bearing sleeve 86E and the axle member 86B.

By rotating the actuating element 87B about the transverse adjustment axis QS, the position of the scoring tool holder 34 and thus of the scoring tool 35 with respect to the longitudinal axis L of the guide body 18 and / or a cutting axis that can be produced by the sawing tool 15 can be adjusted in mutually opposite directions with respect to the transverse adjustment axis QS, for example from a central position by a maximum of 2.5 to 4 mm each.

A latching device 88 is used for fixing, in particular rotational fixing, of the actuating element 87B or the actuator 87A. The latching device 88 comprises a clip-like spring 88A or, alternatively, 188A, at the free ends of which locking members 88B are formed. The detent springs 88B, 188B engage in detent receptacles 88C, which are arranged on the radial outer circumference of the actuating element 87B with respect to the transverse adjustment axis QS. By turning the actuating element 87B, the latching members 88B come out of the one latching receptacle 88C and latch into the next latching receptacle 88C, which is adjacent in the circumferential direction. The latching device 88 thus fixes the transverse adjustment device 87 with respect to a respectively set transverse setting of the lancing tool holder 34.

The actuating slave 72 is arranged on an actuating slave arm 90, namely on its free end region. A pivot bearing 90A for a wheel 90B is arranged there, which can rotate about an axis of rotation D90 using the pivot bearing 90A at the free end region of the actuator arm 90 and represents the gate follower 75. The wheel 90 can therefore roll on the guide link 74.

The actuator arm 90 is pivotable with a bearing portion 91 about a pivot axis, which in the present case corresponds to the depth adjustment axis TV, with respect to the scorer carrier 80 of the scoring unit 31, so that the gate follower 75 depending on the pivot position of the actuator arm 90 with respect to the Depth adjustment axis TV or with respect to the scorer carrier 80 has un different angular positions, so that by pivoting the actuator arm 90 with respect to the scorer carrier 80 different penetration depths of the scoring tool 35 into the workpiece W or different distances with which the scoring tool 35 protrudes in front of the guide surface 19, are adjustable in the active position AP. The actuator arm 90 therefore forms a component of the scoring depth adjustment means 95.

An actuating arm 92 protrudes from the bearing section 91 at an angle from the actuating slave arm 90. An actuating surface 92A is provided on the actuating arm 92, on which an actuating body 93 acts. By adjusting the relative position of the adjusting body 93 with respect to the actuating surface 92A, the actuating The slave arm 90 and thus the link follower 75 are adjusted in such a way that it has different actuation distances BA from the scoring tool holder 34. The link follower 75 and thus the actuator 72 and the scoring tool holder 34 are in the form of arms from Lagerab cut 81 of the scoring carrier 80 to opposite sides.

The actuating body 93 supports the actuating arm 92 against the force of a spring arrangement 94. The spring arrangement 94 comprises a helical spring 94A, which is fixed on the one hand on the scoring carrier 80 and on the other hand on the actuator arm 90 and acts on this in a sense towards the carrier 90 or the scoring tool holder 34. The actuating body 93, on the other hand, acts in the opposite direction, i.e. in the sense of an understanding of the actuator arm 90 from the scorer carrier 80 and thus in the sense of increasing the actuation distance between the actuator 72 and the scoring tool holder 34.

The adjusting body 93 is mounted displaceably along an axis SA with respect to the Vorrit zer support 80. In addition, the adjusting body 93 is mounted transversely to the axis SA, in the present case at right angles, displaceably along an axis SB, this degree of freedom of movement being assigned to the scoring depth adjustment means 95.

The actuating body 93 has a longitudinal end 93A, on which an actuating surface 93B for engagement with the actuating surface 92A of the actuating arm 92 is arranged. Between the longitudinal end 93A and an actuating end 93B, a central section 93C of the actuating body 93 extends, on which the latter has an actuating contour 93D.

The adjusting body 93 is mounted displaceably with respect to the adjusting axis SA on a bearing body 96 designed, for example, as a housing. For example, the bearing body 96 has bearing receptacles 96A, 96C, the sections 96B, 96D of the bearing body 96 are arranged on walls or bearing. The central portion 93C of the actuating body extends between the bearing receptacles 96A, 96C 93, the adjusting body 93 protruding on opposite sides in front of the bearing body 96, namely on the one hand with the adjusting surface 93B, which is in engagement with the actuating surface 92A of the actuating arm 92, and on the other hand with an actuating end or actuating element 93E on which a gripping surface or the same other footprint is arranged for actuation by an operator.

For example, an operator can pull the actuating element 93E in the direction of the actuating axis SA, whereby the actuating body 93 disengages from the actuating surface 92A, so that the spring arrangement 94 moves the actuator arm 90 from an activation position AK away from the guide slot 74 into a Can actuate deactivation position DK. In the deactivation position DK, the link follower 75 is out of engagement with the guide slot 74 and is, for example, at a distance F from the guide slot 74 (FIG. 7), so that the entrainment coupling of the entrainment device 70 between the saw unit 11 and the scoring unit 31 is canceled. The saw unit 11 can thus be adjusted between its depth adjustment positions OT and UT without the scoring unit 11 being adjusted about the depth adjustment axis TV. The scoring tool 35 remains set back behind the guide surface 19, so inactive.

The actuating body 93 thus forms part of a deactivation device 97 for deactivating or activating the entrainment device 70. The actuating body 93 is loaded into its activation position AK by a spring 96E. The spring 96E is supported, for example, on the adjusting body 93, for example on a step close to the central section 93C, and on the wall 96D of the bearing body 96.

At the actuating end or actuating element 93E there is preferably provided a rotation lock 93F which is stationary with respect to the scorer carrier 80, for example a flat surface on which the actuating end 93F is supported non-rotatably with respect to the adjusting axis SA.

The adjusting contour 93D forms part of the scoring depth adjustment means 95. The on the radial outer circumference of the middle section 93C of the adjusting body 93 an- The ordered adjusting contour 93D is in engagement with an adjusting receptacle 98, the position of which can be adjusted along the adjusting axis SB and thus transversely to the adjusting axis SA using a depth adjusting member 99, for example an adjusting screw. An operator can operate the depth adjuster 99 using an actuator 99A. Alternatively, it would be possible that the adjusting body 93 is pivotably mounted about the adjusting axis SA and the adjusting contour 93D represents an eccentric contour, so that by rotating the adjusting body 93 about the adjusting axis SA, parts of the adjusting contour 93D protruding radially to different degrees in front of the adjusting axis SA are supported on the adjusting receptacle 98 and thus the adjusting surface 93B of the adjusting body 93 assumes different positions with respect to the adjusting axis SB.

The depth setting member 99 comprises, for example, an actuating element 99A, for example a head, from which a screw section 99B protrudes, which is rotatably mounted on a component that is stationary with respect to the scorer carrier 80, for example the bearing body 96, and which provides the adjusting receptacle 98. lumbar body 98A is screwed.

By screwing the depth adjuster 99, a transverse position of the adjusting receptacle 98, which is for example U-shaped, can be adjusted transversely to the adjusting axis SA, for example along an adjusting axis SB, whereby at the same time the position of the adjusting surface 93B and thus the actuating surface 92A of the abutting it Actuating arm 92 is adjusted transversely to the adjusting axis SA.

The adjusting body 93 is accommodated in the adjusting receptacle 98 so that it can be displaced along the adjusting axis SA, so that the scoring depth setting means 95 maintain the respective set depth adjustment position, even if the deactivating device 97 is actuated by moving the adjusting element 93 along the adjusting axis SA.

Between the scoring unit housing 33 forming a scoring handle body 37 and the saw unit housing 13 there is an intermediate space 33B in relation to the longitudinal axis L of the guide device 17 or the guide body 18, in which one or more of the for actuation by Operating elements of the scoring unit 31 provided by an operator are easily accessible to the operator, for example the operating element 93E of the deactivating device 97, the operating element 87B of the transverse adjustment device 97 or the operating element 99A of the scoring depth setting means 95.

The hand sawing machine 10 is short in relation to the longitudinal axis L of its guide body 18, that is to say between the end faces 18C, 18D. This is achieved, among other things, by the compact scoring module 30 or scoring unit 31. It is also advantageous that the depth adjustment axis TV is arranged between the tool holders 14 and 34. The hand-held sawing machine 10 is therefore not top-heavy, so to speak, in its front area in the working direction AR, but rather extremely short.

The arrangement of the tool holders 14, 34 and thus the sawmill 15 and the scoring tool 35 close to or directly on the longitudinal side 18A of the guide body 18 also contributes to the user-friendliness of the hand-held sawing machine 10. In this way, among other things, the two tools 15, 35 are clearly visible at their penetration area into the workpiece W. In addition, the miter axis G runs directly next to the longitudinal side 18A, so that the tools 14, 35 can optimally pivot around this longitudinal side 18A, but also around the narrow longitudinal side 204 of the guide rail 200, 200A.

Furthermore, the hand sawing machine 10 provides an advantageous extraction concept for dust, particles and the like that occur when sawing and scoring the workpiece W:

The sawing tool receiving space 48 and the scoring tool receiving space 49 are provided with a saw dust removal device 48A and a scoring dust removal device 49A. The receiving spaces 48, 49 extend up to the guide surface 19, where the sawing tool 15 in one of the lower depth adjustment positions UT and the scoring tool 35 in its active position AP out of the respective receiving space 48, 49 in front of the guide surface 19. stands. The dust removal device 48A, 49A are in flow connection with a dust removal connection 52, which is arranged in the working direction AR at the rear of the hand-held sawing machine 10, in particular at the protective housing 29 at the top at the rear. A suction hose SL of a suction device SV, for example a workshop vacuum cleaner, can be connected to the dust removal connection 52, which is designed, for example, as a connection piece, in order to suck off dust, particles or the like that occur during the sawing operation of the hand-held sawing machine 10.

The protective housing 29 has a protective housing part 40A which is stationary with respect to the carrier 40 and which is covered by a protective housing cover 41 which can be advantageously removed from the protective housing part 40A for maintenance purposes. Between the protective housing part 40A and the protective housing cover 41, the receiving spaces 48, 49 for the parts of the tools 15, 35 on the upper side with respect to the guide device 17 are formed. The protective housing part 40A has, for example, a base wall 29A, which is opposite a cover wall 42 of the protective housing cover 41.

Between the base wall 29A and the cover wall 42 there is a recess 42A through which the tools 15, 35 can be moved out of the protective housing 29 so that they protrude in front of the guide surface 19. In addition to the recess 42A, there is an inclined wall section 42B of the cover wall 42 which is inclined in a sense that a transverse distance between the cover wall 42 and the base wall 29A in the area of the recess 42A is reduced and / or smaller than in one of the guide surface 19 further distant area of the sawing tool receiving space 48, in which the sawing tool receiving space 14 is arranged.

Sidewalls 43C, 43 and 44C, 44 protrude from the base wall 29A and the cover wall 42 at an angle and abut one another at the end and engage one another so that the side walls 43-44 delimit the receiving spaces 48, 49.

The side walls 43C, 43 are, for example, rear walls in the working direction AR. The side walls 44C, 44 extend along or from a top Guide device 17 on the most distant section of the protective housing 29 and on a front section of the protective housing 29 in the working direction AR.

The protective housing 29 has a projection 45 in which the scoring tool receiving space 49 is provided. The cover wall 42 extends up to the projection 45. There are from the cover wall 42 on a side facing away from the guide device 17, a side wall 46 and in the working direction at the front, that is in orientation to the end face 18C, angled from a side wall 47, the front side on the with respect to the carrier 40 are fixed protective housing part 40A, so that overall the projection 45, apart from a passage opening for the scoring tool 35 towards the guide surface 19, also provides a closed scoring receiving space 49.

In principle, it would now be possible to suck off the two receiving spaces 48, 49 via the dust removal connection 52 without further fluidic measures. In this case, however, it is not taken into account that the scoring tool 35, when it cuts into the workpiece upper side WO, hurls particles towards the sawing tool 15, which would considerably impair a view of the front cutting edge of the sawing tool 15 in the working direction AR. To help solve this problem, several measures described below are advantageous. To extract dust, particles or the like, a dust discharge channel 50 runs in an area of the protective housing 29 facing away from the guide device 17. The dust discharge channel 50 is on the one hand through the side walls 44, 44C, on the other hand through the opposing intermediate walls 51, 51C on the cover 41 or protective housing part 40A limited. The dust removal channel 50 runs from a front region of the sawing tool 15 in the working direction AR to the dust removal connection 52 arranged at the rear in the working direction AR.

In principle, it would now be possible for the scoring tool receiving space 49 to communicate directly with the dust removal channel 50. However, the sawing tool receiving space 48 is advantageous from the scoring tool receiving space 49. At least in that area where the sawing tool 15 and the scoring tool 35 are directly opposite, namely close to the guide surface 19, there is a separation, namely in the form of a partition 55. The partition 55 advantageously has a relative to the protective housing 29, for example the Protective housing part 40A, stationary partition wall part 55C. The partition wall 55, in particular the partition wall part 55C, extends up to the guide surface 19 and thus stands between the sawing tool 15 and the pre-scoring tool 35.

On a side facing the scoring tool 35, the partition part 55C or the partition 55 advantageously has a flow guide surface 55E, e.g. inclined inlet or impact surface 55D, on which the particles generated by the scoring tool 35 impinge and are deflected in the direction of the dust removal channel 50, i.e. not towards the sawing tool 15 continue to flow.

At an area of the partition wall section 55C remote from the guide surface 19, the scoring tool receiving space 49 opens at an outflow opening 52C into the dust removal channel 50, so that the particles generated by the scoring tool 35, which are indicated in FIG. 18 as particle flow PV with black arrows, are marked with a Particle stream PS shown with white arrows mix which contains particles generated by the sawing tool 15.

An alternative concept, in which the aforementioned partition 55 between scoring tool 35 and sawing tool 15 is also advantageous and provided, is indicated in FIG. There, however, the receiving spaces 48, 49 are completely separated from one another and the scoring tool receiving space 49 has a dust removal connection 52B separate from the dust removal connection 52 for removing the particles of the scoring unit 31, to which a further suction hose SL2 can be connected. For example, a connection piece for connecting the suction hose SL2 is provided on the dust removal connection 52B, which is also flow-connected to the suction device SV, for example, to generate a particle flow PV that transports away the particles of the scoring unit 31. About the dust removal connection 52 flow from the Sawing tool 15 generated particles as a particle flow PS separated from the particle flow PV to the suction device SV.

Form-fitting contours 52A, for example rotary form-fitting contours, plug-in form-fitting contours, etc., are preferably provided on the dust removal connections 52, 52B for the form-fitting holding of the suction hoses SL, SL2. Furthermore, it is advantageous if the dust removal connections 52, 52B have pivot bearings 52D, so that the suction hoses SL, SL2 are rotatably mounted on the hand-held sawing machine 10.

The arrangement of the tool holders 14, 34 and thus the tools 15, 35 directly on the so-to-speak free longitudinal side 18A of the guide body 17 provides optimal visibility of these tools. A viewing window 54 on the cover wall 42, in particular on its lower edge region close to the guide surface 19, is also advantageous.

The viewing window 54 is arranged in a region of the cover wall 42 where the scoring tool 35 is opposite the sawing tool 15. Both tools can thus be seen through the viewing window 54.

The viewing window 54 could be closed by a fixed, transparent wall, for example made of plastic, so that receiving spaces 48, 49 would be closed by this wall. In the present case, however, a cover element 53, in particular a window body or window cover element, is provided.

The cover element 53 has a sawing tool section 53A and a scoring tool section 53B, which are assigned to the sawing tool 15 or scoring tool 35 and are located opposite each other, at least when the cover element 53 is moved into a cover position ABS in which it the viewing window 54 is covered.

The cover element 53 is adjustable by means of a bearing 53D, in particular a sliding bearing, on the cover wall 42 between the cover position ABS and an open position OS, in which it at least partially exposes the viewing window 54, in particular its section facing the guide surface 19. For grabbing the cover element 53, an actuating contour 53C, for example a rib or the like, is advantageously provided. By sliding actuation in one direction P1, the cover element 53 can be moved into its open position OS, and by sliding actuation in an opposite direction P2 in its cover position ABS from.

The cover element 53 has a partition wall section 56 of the partition wall 55. The partition wall section 56 is in the covering position ABS and in the open position OS telescopically or in such a manner with the stationary partition wall section 55A in engagement or contact that the partition wall 55 is, so to speak, closed. The partition wall section 56 has a partition wall receptacle 57 which comprises, for example, opposite side walls 56A. The stationary partition section 55A can engage in the partition receptacle 57, and in the open position OS it engages more deeply in the partition receptacle 57 than in the covering position ABS.

Recesses 58, 59 are also provided on the cover wall 42, through which the tool receptacles 14, 34 are accessible for a tool change of the tools 15, 35. At this point it should be mentioned that the holding elements 14A, 34A advantageously have identical actuation contours, for example slots for screwdrivers, for a tool with which the holding elements 14A, 34A can be released for a tool change and fixed on the tool holder 14, 34.

A blocking device 85 is provided for a tool change of the scoring tool 35. The blocking device 85 comprises a scoring blocking member 85A which engages in a blocking position in a blocking receptacle 85B, which is connected in a rotationally fixed manner to the scoring tool receptacle 34, for example on an output shaft of the gear 84. The blocking member 85A is axially displaceable Lich on a guide 85C along an adjusting axis S85. By pressing on an actuating contour 85D on an end region of the blocking member 85A protruding freely in front of the guide 85C, an operator can activate the bio- Blocking member 85A in engagement with the blocking receptacle 85B, that is to say in a blocking position in which the scoring tool receptacle 34 is locked in a rotationally fixed manner. This blocking position can be canceled by, for example, pulling the blocking member 85A in one direction away from the blocking receptacle 85B. A spring 85E, shown schematically in the drawing, is advantageously provided, which acts on the blocking member 85A in a release position in which the blocking member 85A does not engage in the blocking receptacle 85B.

Alternatively or in addition, a motor drive 85F can also be provided, for example an electromagnet, electric linear drive, etc., with which the blocking member 85A can be adjusted into the blocking position and / or the release position. For example, the drive 85F can act in the blocking position, while the spring 85E acts in the release position. To switch the drive 85E, an electrical switch 85G is provided, for example, which can be actuated by the operator by pressing or the like. A safety device 100 is used for a safe and convenient tool change of the sawing tool 15 and / or scoring tool 35.

The safety device 100 blocks the switch 60A against switching on the drive motors 12, 32 when it is adjusted to its safety position SG, and releases the switch 60A for switching on the drive motors 12, 32 when it is adjusted to a sawing operating position FS. Thus, both drive motors 12, 32 can be locked against being switched on simultaneously by the safety device 100 for a tool change.

The safety device 100 comprises an actuating element 101 which is mounted on the protective housing 29 and / or with respect to the handle 26 so as to be pivotable about a pivot axis DB. When the actuating element 101 is pivoted away from the protective housing 29 or handle 26, that is to say it assumes the locking position SG position shown in FIGS. 31 and 32, the locking position SG is immediately recognizable for the operator. The actuating element 101 comprises a handle part 102 with side legs, between which in the saw drive position FS a part of the protective housing 29 is added. The actuating element 101 thus hugs the protective housing 29, so to speak, in the sawing operating position FS, and in any case does not project in front of the same. The actuating element 101 can be gripped manually by an operator on the handle part 102.

A motorized drive 101A is also possible for the actuating element 101, for example a schematically illustrated electric motor which can drive or rotate the actuating element 101 and which can be actuated by an operator, for example by a pressure actuation, on the basis of a schematically illustrated one electrical switch 101 B, is switchable.

The grip part 101 is arranged on the free end region of an actuating arm 103 of the actuating element 101, which is mounted on the protective housing 29 with a bearing section 104 so as to be pivotable with respect to the pivot axis DB.

The operating member 101 operates a switch lock member 105 to lock the switch 60A. The locking member 105 has an arm 106 that can be actuated, for example, displaceably and / or pivotably by the actuating element 101, at the free end region of which a rear-engaging contour 107, for example a hook, is arranged, which in the locking division of the switch locking member 105 engages behind the actuating element 60 of the switch 60A arrives, so that it can no longer operate the switch 60A in the direction of its switched-on position.

It is also advantageous if the actuating element 101 is designed to release the locking device 61. For this purpose, for example, an actuating member 108, for example a cam disk or the like, is movement-coupled with the actuating element 101, for example in the sense of a rotation about the axis DB, which acts on an actuator 109 that when the actuating element 101 is moved into the locking position SG the actuating element 61 A out of engagement with the abutment contour 61 B actuated. Thus, the saw unit 11 can about the depth adjustment axis TS from the upper depth adjustment position Swivel position OT into a tool change depth setting position WT that is suitable for a tool change of the sawing tool 15.

A locking device 120 is provided for locking in the tool change depth setting position WT. The latching device 120 has a latching element 121 which is mounted pivotably about a pivot axis S12. The ratchet element 121 comprises a latching projection 122 for latching with a latching receptacle 123 which is fixedly arranged on the protective housing 29, for example next to the depth stop guide 63. A spring 124 loads the latching element 121 in the direction of a latching position in which it is connected to the Locking receptacle 123 can lock.

The latching device 120 can be activated and deactivated by the safety device 100. When the actuating element 101 is adjusted to the securing position SG, it activates the latching device 120. The actuating element 101 is movement-coupled to an actuating element 110 for activating and deactivating the latching device 120, for example in the sense of a rotary movement. The actuating member 110 has on its side facing the latching element 121 an actuating link 111, which acts on an actuating arm 125 of the latching member 121 in such a way that when the actuating element 101 is adjusted to the locking position SG, the latching member 121 latches with the latching receptacle 123 is released by the spring 124 and / or the spring 124 is pretensioned, while when the actuating element 101 is moved into the sawing operating position FS, the latching member 121 is held permanently out of engagement with the latching receptacle 123 against the action of the spring 124 and / or the spring 124 is not latched of the locking member 121 has sufficient spring tension.

When the saw tool holder 14 is adjusted into the tool change depth setting position WT, it is arranged in the region of the recesses 58. The driving device 70 also moves the scoring tool holder 34 into the tool change depth setting position. represents, in which it is arranged in the recess 59. Thus, the tool receptacles 14, 34 are accessible for a tool change of the tools 15, 35.

Furthermore, the actuating element 101 interacts with a blocking device 130 or acts on the blocking device 130, with which the saw-tool holder 14 can be blocked against rotation about the tool axis of rotation DS.

The blocking device 130 has a saw blocking member 131 which, in a blocking position, is in engagement with at least one blocking contour 132 which is non-rotatably connected to the saw tool holder 14. For example, a plurality of blocking contours 132 in the form of blocking recesses 133 are arranged on a fan wheel 134 which is rotatably coupled to the saw drive motor 12 and / or the saw tool holder 14. The fan wheel 134 has fan blades 135, for example. The blocking recesses 133 are arranged on the radial outer circumference of the fan wheel 134.

The motor drive 101A of the safety device 100 simultaneously forms a drive for adjusting the saw blocking member 131 between its blocking position which blocks the saw tool holder 14 and its release position which releases it.

The saw blocking member 131 has at its one longitudinal end a blocking projection 136 which can engage in one of the blocking recesses 133 when this is opposite to it through a corresponding rotational position of the fan wheel. The other longitudinal end of the saw-blocking member 131 is in a La ger, which is not visible in the drawing, movably, in particular sliding received movably and loaded by a spring 137 in the direction of its blocking position. By moving the actuating element 101 into the securing position SG, the saw blocking member 131 is released for actuation by the Fe of 137 or the spring 137 is preloaded by the actuating element 101 to actuate the saw blocking member 131, so that the blocking projection 136 is locked with one of the blocking recesses 133 is biased. If the saw-tool holder 14 is rotated somewhat, one of the blocking recesses 133 moves into a frontal position with respect to the blocking projection 136, so that it engages in the blocking recess 133 and secures the saw-tool holder 14 against further rotation. By adjusting the safety device 100 in the safety position SG, switching on the scorer drive motor 32 is electrically blocked and thus prevented. The operator can therefore safely block the scoring tool holder 34 and change the scoring tool 35 by manually operating the blocking device 85. Instead of or in addition to this manual actuation, a mechanical drive coupling, not shown in the drawing, can also be provided between the scorer blocking member 85A and the saw blocking member 131, so that when the saw blocking member 131 is moved into the blocking position, the scorer blocking member 131 is also simultaneously Blocking member 85A is moved into the blocking position. If a mechanical connection between the blocking members 85A and 131 is impossible or difficult, for example because a coupling of the blocking members 85A and 131 would be mechanically complex or require a lot of space, an electrical coupling is also possible. For example, a sensor 101C is provided for detecting the position of the safety device 100, for example the positions of the actuating element 101. The sensor 101C detects, for example, whether the safety device 100 is in the safety position SG or in the sawing operating position FS. In the sawing operating position FS, the sensor 101C controls, for example, one

The entrainment device 70 is shown schematically in FIG. 33. It can be seen that the operator can actuate the pre-scoring unit 31 from the inactive position in the direction of the active position by pivoting the saw unit 11, the force being transmitted by the entrainment device 70. A scoring drive 32B of the scoring unit 31 is schematically indicated, with a belt 32C or the like, for example, other power transmission transmission element is coupled in motion to the saw drive motor 32 and driven by this in order to drive the scoring tool holder 34. In order to tension the belt, for example, a particularly spring-loaded tensioning roller and / or a length compensation device or the like, which is not shown in the drawing, can be provided.

In the embodiment of the hand-held sawing machine 10C according to Figure 34, a driving device 70C is provided with which a scoring unit 31 C when actuating the saw unit 11 from the upper depth adjustment position shown in the drawing in the direction of a lower depth adjustment position, in which the sawing tool 15 in front of the Guide surface 19 protrudes, is taken. However, the scoring unit 31 C is loaded by a spring arrangement 39 C in the direction of its active position, in which the scoring tool 35 protrudes in front of the guide surface 19, and not in the direction of its inactive position, as in the hand-held sawing machine 10. The actuator 71 C is on the saw unit 11 a driving surface or stop surface is provided on which an actuator 72C of the Vorritzaggre gate 31C is supported. The actuating slave 72C is arranged, for example, on an actuating arm which protrudes from the scoring depth adjustment bearing 36 starting from the scoring unit 31C. When the saw unit 11 is adjusted in the direction of a lower depth adjustment position of the saw tool holder 34, the actuator 71 C releases the actuator 72C, so to speak. H. the spring arrangement 39C can adjust the scoring unit 31C from the inactive position in the direction of the active position.

In the active position, the scoring unit 31 C advantageously strikes with a stop projection 95 C on a scoring depth stop 95 D of the guide device 17. The depth stop 95D can be adjustable for setting different depth setting positions or active positions, for example if it is formed by the head of a screw that can be screwed into the guide device 17. The stop projection 95C is, for example, at a free end rich of an arm of the scoring unit 31 C projecting from the depth adjustment bearing 36 is provided.

In the exemplary embodiment of the hand-held sawing machine 10D, no Mitnahmeein direction is provided between your sawing unit 11 and its scoring unit 31D. The scoring unit 31 D is freely pivotable about the depth setting axis TV based on the explained depth adjustment bearing 36 on the guide device 17, independently of the saw unit 11, but must be manually operated by an operator. For this purpose, for example, a scoring handle body 237D is provided, for example in the manner of an actuating knob, which protrudes upward with respect to the guide device 17 from the scoring unit 31D. Furthermore, the stop projection 95C is advantageously provided on the scoring unit 31 D for stopping against the depth stop 95D.

For switching on and / or switching off a drive motor 32 of the scoring unit 31D, a switch 60D is arranged on the handle body 237D, for example. The handle body 237D thus forms an actuator 71 D for the scoring unit 31 D.

For example, a rotary drive is also possible for adjusting the scoring tool 35 between the active position and the inactive position and / or for adjusting its depth of penetration into the workpiece. For example, a servomotor 72D scoring depth adjustment bearing 36 could be arranged and the scoring tool 35 could be adjusted between different depth adjustment positions by a rotary drive about the depth adjustment axis TV.

Without further ado, however, a motorized drive concept is also advantageous in order to adjust a scoring unit between its inactive position and its active position, which is clear from the exemplary embodiment of the hand-held sawing machine 10E. Their saw unit 11 is manually pivoted in the manner described by the operator between the upper depth adjustment position and one of the lower depth adjustment positions using the depth adjustment bearing 16, while a servomotor 72E is provided for adjusting the scoring unit 31E. As a bet- A sensor which detects the respective rotational positions or relative position of the saw unit 11 with respect to the guide device 17, for example a set depth adjustment position, is used for a driver device 70E. The sensor or actuator 71 E is connected to the servomotor 72E, i.e. an actuator, of the scoring unit 31 E using a control connection, for example a wireless or wired control connection, not shown in the drawing, in order to control it. It goes without saying that the servomotor 72E can also be individually controllable, ie it is decoupled from the actuator or sensor 71E. For example, an electrical switching element 99E, in particular, can be provided with which an operator can individually control the servomotor 72E, for example to make a crack in a workpiece without making a saw cut or to move the scoring unit 31E into the inactive position, in order to produce only one saw cut with the sawing tool 15. Furthermore, a deactivation device 97E is advantageous, for example an electrical switch with which the servomotor 72E can be actuated in the direction of the inactive position or upper position of the scorer tool holder 34E and / or with which the servomotor 72E can be energized in the direction of the active position Scoring tool holder 34E can be blocked.

The deactivation device 97E and / or the switching element 99E for controlling the rotationally driving servomotor 72D could easily be seen.

The scoring unit 31 E, unlike the previously described scoring unit, is not mounted pivotably with respect to the guide device 17, but is mounted displaceably along a depth adjustment axis TVS by means of a sliding bearing 36E. A spring 39E acts, for example, on a scorer carrier 80E, on which a scorer drive motor 32E is held, in the direction of an inactive position in which a scorer tool 35E driven by the scorer drive motor 32E is moved back behind the guide surface 19. The servomotor 72E acts in the opposite direction to the spring 39E, i.e. actuates the scoring tool 35E in the direction of the active position, so that the scoring tool 35E is in front of the guide surface. surface 19 protrudes and can engage in the workpiece. Using the servomotor 72E, however, a depth setting, that is to say a setting of the depth of penetration of the scoring tool 35E into the workpiece W, can also be set.

A scoring unit 31F of a hand sawing machine 10F is also linearly adjustable, namely along a depth adjustment axis TVS using a depth adjustment bearing, in particular a sliding bearing 36F. The sliding bearing 36F comprises, for example, guide rods or support columns on which a scoring carrier 80F is mounted so as to be displaceable with respect to the depth adjustment axis TVS. The scoring carrier 80F is urged into its inactive position by a spring arrangement 39F, in which the scoring tool 35F does not protrude in front of the guide surface 19.

The scoring tool 35F could in itself comprise a saw blade or scoring blade, but, like the scoring tool 35E, is advantageously a milling tool or milling head. The scoring tool 35F is driven by a scoring drive motor 32F.

The scoring unit 31 F can also be adjusted independently of the saw unit 11 between its inactive position and one or more active positions.

In contrast to the hand-held sawing machine 10E, however, the scoring unit 31 F cannot be adjusted by motor between the active position and the inactive position, but rather manually. A spring assembly 39F biases the scorer carrier 80F into the inactive position. In the direction of the active position, a hand lever or other actuating element mounted pivotably on the saw unit 11 is provided as an actuator 71 F, which actuates a force transmission element 90 F by manual actuation, for example a Bowden cable, cable, a pneumatic or hydraulic line or the like, which on an actuator 72F, for example a fluidic cylinder, an actuator or the like, acts to adjust the scoring tool 35 in the direction of the active position against the force of the spring arrangement 39F, this movement being advantageously limited by a depth stop 95F, which is attached to the Füh approximately device 17 is arranged stationary. A scoring unit 31 X essentially corresponds to the scoring unit 31, but has alternative depth adjustment means 195. While the depth setting means 95 effect the depth setting using the actuating body 93, which supports the actuating arm 92, a depth setting member 199 is arranged on the actuating slave arm 90, for example on an actuating arm projection 92B protruding from the actuating arm 92, and is supported on an actuating body 193.

The depth adjustment member 199 has an actuating element 199A which is connected to or has a screw section 199B. The screw portion 199B is screwed into a screw receptacle 92C on the actuating arm projection 92B. The screw section 199B is arranged on a screw body 199C which is screwed into the screw receptacle 92C. The screw body 199C is connected on the one hand to the actuating element 199A and on the other hand receives a support body 199D which is, for example, pin-like or elongated. A free end region of the support body 199D provides an actuation surface 192A with which the actuator arm 90 can be actuated.

The two-part construction of support body 199D and screw body 199C has the advantage that support body 199D can be positioned relative to screw body 199C and can then be fixed there, for example glued, in order to determine a first depth setting position or original depth setting position that the scoring unit 31X occupies should. In this way, for example, manufacturing tolerances can be compensated for. However, it is readily possible for the depth setting member 199 to be in one piece or for parts thereof, for example the support body 199D and the screw body 199C, to consist of one part.

Between the actuating element 199A or screw body 199C, so to speak a head of the depth setting element 199, on the one hand and the actuating arm projection 92B on the other hand, a spring 199E is preferably arranged, which is provided, for example, for a latching and / or a frictional connection to the depth setting element 199 in the respective to fix the set depth adjustment position, for example to jam or to hold it with a friction fit. This can, for example, prevent unintentional adjustment movements, in particular special triggered by vibrations or the like, prevented or reduced.

The scoring depth adjustment means 195 interact with a deactivation device 197 and with an adjusting body 193. The adjusting body 193 protrudes laterally from the scoring carrier 80, similar to the adjusting body 93. However, in contrast to the adjusting body 93, the adjusting body 193 is pivotably mounted, namely about a pivot axis or adjusting axis SB. The adjusting axis SB corresponds to the longitudinal axis or longitudinal extension of the adjusting body 193.

A longitudinal end or bearing end 193A of the actuating body 193, designed for example in the manner of a bearing pin, is pivotably mounted in a bearing receptacle 196 which is fixedly arranged on the carrier 80, namely about the actuating axis SB. The bearing seat 196A is configured, for example, in the manner of a receiving sleeve or a receiving tube. The bearing receptacle 196A is provided, for example, on a bearing body 196 which protrudes from the scoring carrier 80 transversely to its longitudinal extension, in particular at right angles transversely.

A central section 193C of the adjusting body 193 has an adjusting contour 193D on which the depth adjusting element 199 is supported with its actuating surface 192A. The adjusting contour 193D is located between the longitudinal end or bearing end 193A and an actuating element 193E, for example a handle, which protrudes transversely to the adjusting axis SB from the adjusting body 93 and can be easily grasped by an operator.

The adjusting contour 193D has adjusting sections 193G and 193H, which are formed by an eccentric circumferential shape of the adjusting contour 193D with respect to the pivot axis or adjusting axis SB. The actuating section 193G is assigned to the activation position AK of the deactivation device 197 and protrudes further in front of the actuating axis SB than the actuating section 193H, which is assigned to the deactivation position DK. The actuating section 193H thus deflects the depth setting member 199 from a little distant from the actuating axis SB, whereby the actuator arm 90 due to the spring force of the spring arrangement 94 further from the actuator 71, the Guide link 74 is removed as in the activation position AK. Then the actuating section 193G, which protrudes further in front of the actuating axis SB, acts in a position which deflects or actuates the actuator arm 90 further in the direction of the actuator 71 and in which the actuator 72 is in contact with the actuator 71.

A spring 196E is supported on the one hand on a step of the adjusting body 193, on whose outer circumference the adjusting contour 193D is provided, and on the other hand on a step on the outer circumference of the bearing body 196 and thus loads the adjusting body in the sense of a frictional connection or a latching in the respective - Set deactivation position DK or activation position AK. For example, the spring 196E presses a radial projection or flange projection 193B, on the outer circumference of which the positioning contour 193D is arranged, against a support surface 196B. The support surface 196B is provided on the motor housing 33A, for example.

The scorer drive motor 32 is regularly turned on and off by the switch 60A when the saw drive motor 12 is turned on and off. In the deactivation position DK of the deactivation device 197, however, the scoring drive motor 32 is not required. In principle, it is not a problem if the scoring drive motor 32 is energized, even if the scoring unit 31 or 31 X is in its deactivation position DK and / or is in its inactive position IP. The scoring tool 35 is then driven, but does not stand in front of the guide surface 19 in the sense of engaging the workpiece W and / or is received in the protective housing 29. In this situation, however, the scorer drive motor 32 can advantageously be switched off, for example by a switch 32S and / or 32S2. The switch 32S or 32S2 is, for example, part of a control device 32T, which is arranged in the motor housing 33A, or is assigned to it.

The motor housing 33A has, for example, a receiving part or lower part 33B and a cover 33C, which in the closed state encapsulate or enclose the Vorrit zer drive motor 32 and the control device 32T. close so that these electrical components are protected from environmental influences.

The switch 32S or 32S2 comprises, for example, or is formed by a magnetic or other non-contact sensor. The switch 32S is arranged, for example, on a carrier 32H, for example a circuit board, outside the motor housing 33A and communicates with the control device 32T. The switch 32S2, which is provided as an alternative or in addition to the switch 32S, is accommodated in a protected manner in the interior of the motor housing 33A and is, for example, part of the control device 32T. To actuate the switch 32S or 32S2, an actuation element 32G, for example a magnetic transmitter or the like, is provided. The actuating element 32G can be actuated by the actuating body 193. For example, the actuating element 32G is received in a holding receptacle of the actuating body 193, for example in a pocket. The actuating element 32G could easily also be arranged on the actuating body 93. In any case, the actuating element 32G is, for example, axially displaceable along the adjusting axis SA and / or rotatable about the adjusting axis SA or SB, so that its position relative to the sensor or switch 32S or 32S2 changes. The switch 32S communicates with the control device 32T and transmits the respective position of the actuating element 32G to it. Depending on the respective position of the actuating element 32G to the switch 32S, this or the control device 32T switches the scorer drive motor 32 on or off, namely in the activation position AK on and in the deactivation position DK of the actuating body 93 or 193 off.

The scoring tool 35 is explained below in embodiments 35A, 35B, 35C, 35D. To the extent that the aforementioned scoring tools 35 -35 D have the same components, a scoring tool 35 is also referred to in general terms.

For example, each scoring tool 35 has a blade body 310 with flat sides 311, 312 opposite one another. On a radial outer circumference of the Blade bodies 310 are arranged in the scoring tools 35A, 35B, 34C, 35D scoring tooth arrangements 300A, 300B, 300C, 300D. Scoring tooth assemblies 300A, 300B, 300C, 300D have different numbers of scoring teeth 301-304. For example, the scoring tooth arrangement 300A has scoring teeth 301, 302, 303, 304, i.e. a total of four scoring teeth, while the scoring tooth arrangement 300B has only three scoring teeth 301, 302, 303 and the scoring tooth arrangement 300C has only one scoring tooth 301 and finally the scoring tooth arrangement 300 D have only two scoring teeth 301, 302.

The blade body 310 has at its center ZV a machine receptacle 315 for releasable attachment to the scoring tool receptacle 34 of the Sägema machine 10. The center ZV is penetrated by a central axis or axis of rotation DV of the scoring tool 35, which is also the axis of rotation of the Vorrit zer tool holder 34 when the scoring tool 35 is attached to the Sägema machine 10. The scoring teeth 301-304 project with main cutting edges 350 in front of a radial outer circumference 313 of the blade body 310 or scoring tool 35, so that they are available there for cutting into the workpiece surface WO of the workpiece W.

The scoring teeth 301-304 therefore project in front of a radial outer peripheral surface 314 of the blade body 310. The circumferential surface 314 has a substantially cylindrical jacket-shaped shape.

There are relatively large angular distances between the scoring teeth 301-304. For example, in the scoring tool 35, angular distances WA of approximately 90 ° or exactly 90 ° are provided between the scoring teeth 301-304. In the case of the scoring tool 35B, angular distances WB of, for example, 120 ° are provided between the scoring teeth 301-303. In the scoring tool 35 C there is only a single scoring tooth 301, which leads to an angular distance of 360 °. If, in the case of the scoring tooth arrangement 300D, there are two scoring teeth 301, 302, these are preferably equidistant from one another and have an angular distance WD of 180 °.

At this point it should be mentioned that different angles between scoring teeth can of course also be provided. For the sake of clarity, the scoring tooth 303 of the scoring tool 35A is shown in dashed lines, for example. For example, it might not be there.

A chip space 316 is provided in front of each scoring tooth 301-304. The chip space 316 is formed by a recess 317 of the blade body 310, which is designed from the radial outer circumference 313 radially inward in the manner of a trough, in particular an approximately U-shaped or V-shaped trough. Each recess 317 or each chip space 316 has a bottom 318, from which side surfaces 319, 320 extend in the direction of the radial outer circumference 313. The side surfaces 319, 320 are essentially straight. The side surface 319 faces a respective main cutting edge 350 of a scoring tooth 301-304, while the side surface 320 of the chip space 316 lies opposite this main cutting edge 350, so to speak. Between the side surface 320 and the radial Außenum catch 313 or the circumferential surface 314, an arcuate transition portion 321 runs.

Apart from the chip spaces 316, the radial outer circumference 313 extends in a circular or annular manner around the central axis of the blade body 310 or in front of scoring tool 35, that is to say the axis of rotation DV. For example, this arcuate course extends over an angle of at least 30 °, preferably at least 40 ° or even more with respect to the axis of rotation DV, even if, as in the case of the scoring tool 35A, four scoring teeth 301-304 are provided.

The scoring teeth 301-304 each have a cutting body 330. Each cutting body 330 is fastened with a fastening part 331 on the blade body 310, in particular the side surface or close to the side surface 319. For example, the side surface 319 has a step into which the respective cutting body 332 is inserted. For example, in such a stage, the fastening part tie 331 added. The fastening part 331 of the cutting body 332 is supported on the rear side on the blade body 310.

In front of the blade body 310, sections 332 of the cutting bodies 330 protrude radially outward with respect to the axis of rotation DV. Lateral sections 333 of the cutting bodies 330 protrude in front of the flat sides 311, 312. The sections 332, 333 are therefore mechanically stressed during the working operation of the scoring tool 35, when this cuts into the workpiece W, but are optimally supported by the fastening part 331. It is also advantageous if the cutting bodies 330 have radially inwardly protruding support projections 334, which are also supported on the blade body 310.

The scoring teeth 301-304, therefore the cutting bodies 332, have the main cutting edges 350 which, for example, run parallel to the axis of rotation DV or the central axis of the scoring tool 35.

The secondary cutting edges 351 extend transversely to the main cutting edge 350. The secondary cutting edges 351 are, for example, somewhat more than right-angled, that is to say, for example, in an angular range of 90-110 ° with respect to the main cutting edge 350, which is located between the secondary cutting edges 351. For example, the main cutting edge 350 and the respectively adjacent secondary cutting edge 351 enclose an angle 354 which is a minimum of 90 ° and a maximum of 110 °. In the exemplary embodiment, an angular dimension Wl of the angle 354 is approximately 7 ° for example.

The secondary cutting edges 351 extend radially inward with respect to the axis of rotation DV, with radially inner end regions 355 having a radial distance RD from the main cutting edge 350. The secondary cutting edges 351, which are inclined slightly or slightly obliquely with respect to the flat sides 311, 312, enable the scratches RI to be produced at different depths, the transverse width of the respective scratches RI increasing when the scoring tool 35 dips or penetrates deeper into the workpiece surface WO. The maximum depth Rmax of the crack RI is therefore basically determined by the radial distance RD. However, the scratch RI could be made even deeper in the present case, namely if, for example, side parts 352 of the cutting body 332 or scratch teeth 301-304 are also designed as cutting edges. The side parts 352 run, for example, parallel to a central plane of the blade body 310 or at right angles to the axis of rotation DV.

A scratch RI produced by the scoring tool 35 has a crack bottom RB from which side flanks RF extend to the workpiece surface WO. A transverse width of the bottom RB is determined by the transverse distance Q1 of the secondary cutting edges 351 in the area of the main cutting edge 350 or the length of the main cutting edge 350.

A step 353 is formed between the radially inner ends of the side parts 352 and the respective flat side 311, 312.

The sawing tool 15 includes, for example, a saw blade 15A. A blade body 370 of the saw blade 15A has flat sides 371, 372 opposite one another and, on its radial outer circumference 373 with respect to the axis of rotation DS, about which the saw blade 15A rotates during the sawing operation, a sawtooth arrangement 376 with saw teeth 377.

The number of saw teeth 377 is greater than the number of scoring teeth 301-304. Furthermore, the saw teeth 377 have a smaller angular distance with respect to the axis of rotation DS, about which the saw blade 15A is driven, than the scoring teeth 301-304 with respect to the axis of rotation DV.

The sawing tool 15 is provided and designed for sawing or cutting into the workpiece W from its underside WU. At its center ZS, the saw blade 15A has a machine receptacle 375, which is penetrated by the axis of rotation DS or the central axis of the saw blade 15A.

The radial outer circumference 373 has an outer diameter D73 which, for example, is three to four times larger than an outer diameter D13 of the outer circumference 313 of the scoring tool 35. An inner diameter D75 of the machine receptacle 375 of the saw blade 15A is greater than an inner diameter D15 of the machine receptacle 315 of the scoring tool 35.

A maximum transverse width of the scratch RI in the area of the workpiece surface can be set in that the scoring tool 35 penetrates the workpiece surface WO at different depths. A maximum width of the crack RI, that is to say a maximum distance between the crack side flanks RF, is determined by a transverse distance Q2 that the secondary cutting edges 351 have from one another in the region of the maximum radial distance RD. The crack RI can therefore be maximally as wide as the transverse distance Q2.

Such an adaptation is particularly advantageous because it allows the scoring tool 35 to be used in conjunction with different sawing tools or saw blades, at least with sawing tools whose cutting width or cutting width (based on the respective length parallel to the axis of rotation DS) can be different. The above-mentioned adaptation is also advantageous in connection with manufacturing tolerances or dimensional tolerances of the sawing tool or saw blade and / or with different immersion depths of the saw blade in the workpiece or the like.

The scoring tool 35A can be adjusted with regard to its depth of penetration into the workpiece W. The scoring tool holder 34 is part of the scoring unit 31, which has a scoring drive 23A. The scoring drive 32A comprises a scoring drive motor 32 which drives the scoring tool holder 34 directly or via a gear (not shown in the schematic illustration), on which the scoring tool 35 is in turn arranged. For example, a mounting flange penetrates the machine holder 315. Between the drive motor 32 and the tool holder 34, for example, a stepped gear can be provided so that the axis of rotation of the tool holder 34 and the motor axis of rotation of the drive motor 32 are not aligned, in particular that the motor axis of rotation of the drive motor 32 is a greater distance to a region of the scoring tool 35, which is provided for penetration into the workpiece W, as the drive axis of rotation DV.

The saw tool holder 14, on which the machine holder 375 is arranged, can be driven by a saw drive motor 12, for example directly or via a gear unit not shown in the drawing.

The scoring unit 31, like a saw unit 11, is arranged on a guide device 17, for example movably on a guide body 18 of the guide device 17. Its guide surface 19 is provided for guiding along the workpiece surface WO. Both the saw tool holder 14 and the scoring tool holder 34 are adjustable in depth with regard to the guide surface 19 so that they are more or less far in front of the same. As a result, penetration depths of the scoring tool 35 and the sawmill 15 in the workpiece W are adjustable.

The sawing tool 15 is now set or adjustable in such a way that its main cutting edges 380 cut into the workpiece W from the workpiece underside WU. In addition, next to the main cutting edges 380 run at an angle to the same secondary cutting edges 381, which cut the side flanks of the SAE saw, which can be cut into the workpiece W with the sawing tool 15, so to speak. In any case, the saw cut SAE has a saw cut width SBB which is brought about on the one hand by the length of the main cutting edges 380 and on the other hand also by the secondary cutting edges 381, which are inclined, for example, at an angle to the main cutting edge 380, similar to the secondary cutting edges 351 to the main cutting edges 350.

Since the saw teeth 377 cut into the workpiece W from the workpiece underside WU and thus come out of the workpiece upper side WO, this harbors the risk that the side flanks of the saw cut SAE will tear out in the area of the workpiece upper side WO. The scoring tool 35 is now to be set or adjusted in terms of its depth of penetration into the workpiece W or the extent that the scoring tool 35 protrudes in front of the guide surface 19. provided that the scratch RI on the workpiece surface WO has a scratch width RBB that is greater than the saw cut width SBB. The sawmill 15 or saw blade 15A then emerges from the workpiece W between the side flanks RF of the crack RI on the workpiece surface WO. If, for example, a covering or a coating, a veneer or the like is arranged on the workpiece surface WO, the covering or the coating is not affected or damaged by the saw teeth 377 protruding from the workpiece W.

The inclination of the side flanks RF has the advantage that the crack RI has a slight phase or bevel in the transition area to the workpiece surface WO.

The saw drive motor 12 has an outside diameter D12, and the scoring drive motor 32 has an outside diameter D32. In relation to the outer diameter of the respective driven scoring tool 35 or sawing tool 15, the outer diameter D12 of the saw drive motor 12 is smaller than the outer diameter D32 of the scoring drive motor 32. Thus, for example, the ratio of the outer circumference D73 to the outer circumference D12 or the quotient of outer circumference D73 to outer circumference D12 greater than the ratio of outer circumference D13 to outer circumference D32 or the quotient of outer circumference D13 to outer circumference D32 of scorer drive motor 32.

With the aid of adjusting means 12B and / or 32B, for example, speeds of the saw tool holder 14 and the scoring tool holder 34 can be adjustable. It is possible that the scorer tool holder 34 is always operated at the same speed, while the speed of the saw tool holder 14, for example the speed of the saw drive motor 12, is adjustable. The configuration is such that the scoring tool holder 34 is driven or drivable at a speed that is at least twice as high, preferably three times as high or four times as high as the saw tool holder 14. Furthermore, directions of rotation VS, VR of the tool holders 14, 34 are mutually exclusive. The tool holder 34 for the scoring tool 35 is driven, for example, with the direction of rotation VR, which corresponds to a synchronous saw. The direction of rotation VR therefore acts to the effect that the scoring tool 35 feeds or drives the sawing machine 10, so to speak, along the workpiece W.

The direction of rotation VS of the saw tool holder 14 is such that the guide surface 19 is acted upon by force in the direction of the workpiece surface WO.

In the case of the cutter body 330, the secondary cutting edges and main cutting edges are straight. Alternatively, however, main cutting edges and secondary cutting edges with curved, for example concave, convex courses, also in combination or secondary cutting edges and / or main cutting edges with sections of different inclination and / or curvature are possible.

For example, a cutting body 330B has a main cutting edge 350 with a straight course, while secondary cutting edges 351B, between which the main cutting edge 350 is arranged, have edge sections 360B, 361B. The edge sections 360B are, for example, rectilinear courses. The edge sections 360B are, for example, at right angles to the main cutting edge 350. In contrast, the sections 361B are inclined at a flat angle with respect to the sections 360B and have an angle of, for example, 103-105 ° with respect to the main cutting edge 350.

A cutting body 330C also has the main cutting edge 350, but secondary cutting edges 351 C with sections 360C and 361 C. The sections 360C are concave with respect to a center plane Ml, which runs between the flat sides 311 and 312 of the blade body 310, but with a lesser curvature so the Sections 361 C.

To illustrate a convex course, a cutting body 330D is shown, the secondary cutting edges 351D of which are concave with respect to the central plane M1. As an alternative to the straight main cutting edge 350, the main cutting edge 350D, for example, can be provided, which has a convex profile in a direction away from the blade body 310.

Furthermore, it is of course advantageous if the cutting bodies or scoring teeth of a scoring tool are, so to speak, symmetrical, ie. H. Form a cutting edge on opposite sides and thus in the area of each flat side 311, 312. However, it is also possible for scoring teeth or cutting bodies to have a cutting edge only on one flat side 311 or 312. This is indicated schematically in the case of the cutting body 330B. For example, instead of a secondary cutting edge 351B on the right in the drawing, a side surface 359 can be provided on a cutting body 330B, which does not project in front of the flat side 311, and on a cutting body 330B which follows or leads in the circumferential direction of the blade body 310 or scoring tool 35 instead of a cutting body 330B The secondary cutting edge 351 B on the left of the drawing shows a side surface 359 that does not understand the flat side 312.

Claims

Expectations

1. Hand sawing machine (10) with a saw unit (11) which has a saw tool holder (14) for a saw tool (15), in particular a saw blade, and a saw drive motor (12) for driving the saw gene tool holder (14), and with a guide device (17) which has a guide body (18) with a guide surface (19) extending along a longitudinal axis (L) for guiding the hand-held sawing machine (10) along a working direction ( AR) on a workpiece (W) or a guide rail (200), with the aid of the sawing tool (15) protruding in front of the guide surface (19) in a sawing operation of the hand machine tool a saw cut (SAE) along the working direction (AR) can be introduced into the workpiece (W), the hand-held sawing machine (10) having a scoring unit (31) with a scoring tool holder (34) arranged in front of the saw unit (11) on the guide device (17) in relation to the working direction (AR) for a scoring tool (35), in particular which has a scoring saw blade, and with a scoring drive (32A) for driving the scoring tool holder (34), with the scoring tool (35) protruding in front of the guide surface (19) in a scoring operation of the hand machine tool to be introduced saw cut (SAE) in the working direction (AR) upstream score (RI) can be introduced into the workpiece (W), characterized in that the saw tool holder (14) and the scorer tool holder (34) on one of the Guide surface (19) opposite top (19A) of the guide body (18) are arranged directly next to a parallel to the longitudinal axis (L) of the guide body (18) extending free longitudinal side (18A) of the guide body (18) so that the Saw tool holder (14) arranged saw tool (15) and the scoring tool (35) arranged on the scoring tool holder (34) on the free longitudinal side (18A) of the guide body (18) extend past and in front of the Protrude guide surface (19).

2. Hand sawing machine (10) according to claim 1, characterized in that the saw tool holder (14), in particular the saw unit (11) as a whole, on or with respect to the guide device (17) using a saw depth adjustment bearing (16 ) is movably mounted between an upper depth adjustment position (OT) and at least one lower depth adjustment position (UT), the sawing tool (15) in the lower depth adjustment position (UT) protruding further in front of the guide surface (19) than in the upper depth adjustment position (OT).

3. Hand sawing machine according to claim 1 or 2, characterized in that the scoring tool holder (34), in particular the scoring unit (31) as a whole, on or with respect to the guide device (17) using one of the saw depth adjustment bearings (16) separate scoring depth adjustment bearing (36) between tween at least one active position (AP), in which the scoring tool (35) arranged on the Vorrit zer tool holder (34) protrudes in front of the guide surface (19), and an inactive position (IP) movably mounted is, in which the scoring tool (35) is moved back behind the guide surface (19).

4. Hand sawing machine according to one of the preceding claims, characterized in that the free longitudinal side (18A) of the guide body (18) is opposite a cover wall (42), the sawing tool (15) and / or the scoring tool (35) between the free Long side (18A) of the guide body (18) and the cover wall (42) are arranged.

5. Hand sawing machine according to claim 4, characterized in that the cover wall (42) forms a transverse side wall of the hand sawing machine (10), in front of which the guide body (18) does not protrude transversely outward with respect to the longitudinal axis (L).

6. Hand sawing machine according to claim 4 or 5, characterized in that the free longitudinal side (18A) of the guide body (18) and an edge region of the opposite cover wall (42) delimit a particularly slot-shaped recess which is open in the direction of the guide surface (19) , through the through the sawing tool (15) and / or the scoring tool (35) can protrude in front of the protective housing (29) and the guide surface (19).

7. Hand sawing machine according to one of claims 4 to 6, characterized in that the cover wall (42) on its edge region opposite the free longitudinal side (18A) of the guide body (18) has an inclined wall section which, with respect to the guide surface (19) is inclined obliquely to the free longitudinal side (18A) of the guide body (18).

8. Hand sawing machine according to one of claims 4 to 7, characterized in that it is arranged on the cover wall (42) at least one viewing window (54) through which at least one part of the scoring tool (35) and / or one Part of the sawing tool (15) is visible.

9. Hand sawing machine according to claim 8, characterized in that the at least one viewing window (54) is arranged on an edge region of the cover wall (42) lying opposite the guide body (18), in front of which the sawing tool (15) and / or the scoring tool (35) protrudes in a sawing operation of the hand machine tool.

10. Hand sawing machine according to claim 8 or 9, characterized in that the at least one viewing window (54) has such a longitudinal extent that through the viewing window (54) a section of the sawing tool (15) and a section of the scoring tool opposite to it ( 35) are visible.

11. Hand sawing machine according to one of claims 8 to 10, characterized in that on the at least one viewing window (54) a cover element (53) movable between an open position exposing the viewing window (54) and a covering position covering the viewing window (54) (ABS) is supported by means of a bearing, in particular a sliding bearing.

12. Hand sawing machine according to claim 11, characterized in that the cover element (53) is at least partially transparent or translucent, so that the working area of the sawing tool (15) or scoring tool (35) through the Cover element (53) can be seen through in its cover position (ABS) and / or that the cover element (53) comprises or is formed by a plate body.

13. Hand sawing machine according to claim 11 or 12, characterized in that the cover element (53) has a scoring tool section (53B) for covering a portion of the scoring tool (35) and a sawing tool section (53A) for covering a portion of the The sawing tool (15), the scoring tool section (53B) and the sawing tool section (53A) preferably having different surface expansions and / or length expansions.

14. Hand sawing machine according to one of the preceding claims, characterized in that on the free longitudinal side (18A) of the guide body (18) at least one protective housing (29), in particular a protective hood, for receiving one in each case not in front of the guide surface (19) is arranged in the direction of the workpiece to be machined (W) protruding portion of the sawing tool (15) and / or scoring tool (35).

15. Hand sawing machine according to claim 14, characterized in that the at least one protective housing (29) protrudes transversely to the longitudinal axis (L) of the guide surface (19) in front of the free longitudinal side (18A) of the guide body (18) and / or the guide body ( 18) at least in the area of the sawing tool (15) or the scoring tool (35) transversely to the longitudinal axis (L) of the guide body (18) does not protrude in front of the at least one protective housing (29).

16. Hand sawing machine according to one of the preceding claims, characterized in that on the guide surface (19) a guide contour (216) extending parallel to the longitudinal axis (L), in particular a guide receptacle or guide groove, for supporting on a counter-guide contour (206), in particular a guide projection or a guide rib, the guide rail (200) is arranged so that the hand-held sawing machine with respect to a feed along the working direction (AR) on the counter-guide contour (206) is supported and the sawing tool (15) and the scoring tool (35) protrude past a longitudinal narrow side (204) of the guide rail (200) to the underside (201) thereof.

17. Hand sawing machine according to claim 16, characterized in that it comprises the guide rail (200) or forms part of a system which comprises the hand sawing machine (10) and the guide rail (200).

18. Hand sawing machine according to claim 16 or 17, characterized in that when the hand sawing machine (10) on the guide rail (200) is arranged, the guide body (18) is not transverse to its longitudinal axis (L) in front of the longitudinal narrow side (204) of the guide rail (200) protrudes and / or only a protective housing (29) of the hand sawing machine (10) that accommodates the sawing tool (15) or scoring tool (35) transversely to the longitudinal axis (L) of the guide body (18) in front of the longitudinal narrow side (204) of the guide rail (200) protrudes.

19. Hand sawing machine according to one of the preceding claims, characterized in that the saw tool holder (14), in particular the saw unit (11) as a whole, and / or the scoring tool holder (34), in particular the scoring unit (31 ) as a whole, is mounted on the guide device (17) by means of a miter bearing arrangement (21 A) so as to be pivotable about a miter axis (G) which runs directly next to and parallel to the free longitudinal side (18A) of the guide body (18).

20. Hand sawing machine (10) according to claim 19, characterized in that the saw depth adjustment bearing (16) and / or the scoring depth adjustment bearing (36) on a carrier (40) designed in particular as a cover hood and / or protective housing (29) ) are arranged, which is arranged between a front in the working direction (AR) and a rear miter bearing (21, 22) of the miter bearing arrangement (21 A) in the working direction (AR).

21. Hand sawing machine according to one of the preceding claims, characterized in that the scoring unit (31) has a scoring device for removing dust when the scratch is introduced (RI) has particles produced by the scoring tool (35) in the workpiece (W).