Mobile hand-held sawing machine having pre-scribing tool at longitudinal side

Abstract

The invention relates to a hand-held sawing machine (10) having a sawing unit (11), which has a sawing tool receptacle (14) for a sawing tool (15) and a sawing drive motor (12) for driving the sawing tool receptacle (14), and having a guide mechanism (17), which has a guide body (18), the invention relates to a guide body for a hand-held sawing machine (10), comprising a guide surface (19), which extends along a longitudinal axis (L), for guiding the hand-held sawing machine (10) in a working direction (AR) on a workpiece (W) or a guide rail (200), a saw cutting (SAE) can be introduced into the workpiece (W) in the working direction (AR) by means of a saw cutting tool (15) protruding upstream of the guide surface (19) during a sawing operation of the hand-held tool machine.

Description

Technical Field

[0001] This application is a divisional application of Chinese patent application 202080085632.6, filed on June 10, 2022, and entitled “Movable handheld sawing machine with pre-scoring tool on the longitudinal side”.

[0002] The present invention relates to a movable hand-held sawing machine with a sawing unit, wherein the sawing unit has a sawing tool holder for a sawing tool, in particular a saw blade, and a sawing drive motor for driving the sawing tool holder, and a guide mechanism, wherein the guide mechanism has a guide body with a guide surface extending along a longitudinal axis for guiding the hand-held sawing machine on a workpiece or a guide rail in a working direction, wherein a sawing cut can be introduced into the workpiece in the working direction by means of a sawing tool that protrudes before the guide surface during sawing operation of the hand-held machine tool, wherein the hand-held sawing machine has a pre-scribing unit arranged on the guide mechanism before the sawing unit with respect to the working direction, the pre-scribing unit having a pre-scribing tool holder for a pre-scribing tool, in particular a pre-scribing saw blade, and a pre-scribing drive for driving the pre-scribing tool holder, wherein a score that is arranged in the working direction in front of the sawing cut to be introduced can be introduced into the workpiece in the working direction by means of the pre-scribing tool that protrudes before the guide surface during pre-scribing operation of the hand-held machine tool. Background Art

[0003] Such a hand-held sawing machine is described, for example, in EP 0 324 444 A2. While the known hand-held sawing machine allows saw cuts to be made in a workpiece, wherein the saw blade is exposed on the upper side of the workpiece, damage such as detached shavings, etc., is not caused or is caused to a reduced extent due to the scoring introduced by the pre-scoring unit, the known hand-held sawing machine is difficult to operate, for example, because it is difficult to see the pre-scoring tool, making it difficult to guide the hand-held sawing machine along the workpiece along the planned scoring or planned saw cut.

[0004] Hand-held sawing machines with a pre-scribing unit are also known from DE 73 24 551 U1 and DE 91 06 212 U1.

[0005] Further hand-held sawing machines are known from DE 929 640 B, US Pat. No. 3,277,934 and US Pat. No. 10,131,450 B2. Summary of the Invention

[0006] It is therefore an object of the present invention to provide an improved hand-held sawing machine.

[0007] In order to achieve this object, in a hand-held sawing machine of the type mentioned at the outset, it is provided that the sawing tool holder and the pre-scoring tool holder are arranged on the upper side of the guide body opposite the guide surface directly next to the free longitudinal side of the guide body extending parallel to the longitudinal axis of the guide body, so that the sawing tool arranged on the sawing tool holder and the pre-scoring tool arranged on the pre-scoring tool holder extend past the free longitudinal side of the guide body and protrude in front of the guide surface.

[0008] The guide body is, for example, a plate body. The free longitudinal sides are, for example, the longitudinal narrow sides of the plate body.

[0009] That is, the sawing tool and the pre-scribing tool are arranged transversely to the outside of the guide body with respect to the longitudinal axis or longitudinal center axis. That is, the sawing tool and the pre-scribing tool are not arranged in a recess in the guide body, but rather on its free longitudinal side. It is also readily possible for a portion of the guide body to project transversely to the longitudinal axis before and / or after the pre-scribing tool or the sawing tool in the working direction and / or between them, for example a portion having an indicator, by means of which the stripping line on the workpiece can be aligned, so to speak. In contrast, in the area of the sawing tool or the pre-scribing tool, the guide body is arranged only on one side of the sawing tool or the pre-scribing tool. One side, in particular the flat side, of the sawing tool or the pre-scribing tool is opposite the guide body, while the other, opposite side faces away from the guide body and is not opposite any part of the guide body there. However, a protective element, such as a portion of a protective housing, a cover wall or the like, can be arranged on the side of the sawing tool and / or pre-scribing tool facing away from the guide body, in particular on the flat side, so that the sawing tool or pre-scribing tool is arranged in a sandwich-like manner between the free longitudinal side of the guide body and the protective element. The sawing tool and the pre-scribing tool are not arranged transversely to the working direction or transversely to the longitudinal axis of the guide body between the parts of the guide body, but rather on its free longitudinal side.

[0010] Furthermore, it is advantageously provided that the sawing tool holder, in particular the sawing unit as a whole, is mounted movably on or in relation to the guide means by means of a sawing depth adjustment support between an upper depth adjustment position and at least one lower depth adjustment position, wherein the sawing tool protrudes further in front of the guide surface in the lower depth adjustment position than in the upper depth adjustment position. This makes it possible, for example, to make saw cuts of different depths in the workpiece.

[0011] The handheld sawing machine is preferably a plunge saw, wherein the sawing depth adjustment support is arranged behind the sawing tool receptacle in the working direction.

[0012] The handheld sawing machine preferably has no protective cover for the sawing tool and / or the pre-scribing tool that projects beyond the guide surface. The handheld sawing machine advantageously has no swinging hood. Preferably, the handheld sawing machine has no protective cover for the sawing tool or the pre-scribing tool, or both, that is movable relative to the sawing tool receptacle and / or relative to the pre-scribing tool receptacle. Each of these measures can be provided separately.

[0013] It is further preferred that the pre-scribing tool holder, in particular the pre-scribing unit, is movably supported as a whole on the guide mechanism or in relation to the guide mechanism by means of a pre-scribing depth adjustment support that is separate from the sawing depth adjustment support between at least one active position, in which the pre-scribing tool arranged on the pre-scribing tool holder projects in front of the guide surface, and an inactive position, in which the pre-scribing tool is adjusted back behind the guide surface. This allows the pre-scribing tool to be adjusted to the inactive position, for example, when no score is to be produced.

[0014] The sawing depth adjustment support and the pre-score depth adjustment support are preferably arranged on the guide body at a longitudinal distance relative to the working direction.

[0015] The sawing depth adjustment support and the pre-score depth adjustment support are preferably arranged separately from one another on the guide body.

[0016] The sawing depth adjustment support and the pre-score depth adjustment support advantageously have no common support parts.

[0017] A preferred embodiment provides that the free longitudinal side of the guide body is opposite a cover wall, wherein the sawing tool and / or the pre-scribing tool is arranged between the free longitudinal side of the guide body and the cover wall. The cover wall can, for example, form a component of the protective housing described more clearly. However, it can also be a separate cover wall. The cover wall serves, for example, to cover a sawing tool receiving space provided for receiving a sawing tool and / or a pre-scribing tool receiving space provided for receiving a pre-scribing tool.

[0018] The cover wall advantageously forms the outermost or furthest laterally outwardly projecting component of the hand-held sawing machine transversely to the outside relative to the longitudinal axis. In other words, it is advantageously provided that the cover wall forms a transverse side wall of the hand-held sawing machine, before which the guide body does not project laterally outwardly relative to the longitudinal axis.

[0019] Advantageously, the free longitudinal side of the guide body and the edge region of the cover wall opposite it delimit a recess, in particular a slot-shaped recess, which is open in the direction of the guide surface and through which a sawing tool and / or a pre-scribing tool can protrude in front of the protective housing and the guide surface. Advantageously, the recess, which is open in the direction of the guide surface, is narrower than an operator's finger, for example by 12 mm.

[0020] Furthermore, it is advantageous if the cover wall has an inclined wall section at its edge region opposite the free longitudinal side of the guide body. This wall section is inclined in a manner inclined toward the free longitudinal side of the guide body relative to the guide surface, for example, in the sense of narrowing the aforementioned slot. Thus, the wall section has a smaller lateral distance from the guide body near the guide surface than in areas further away from the guide surface (for example, in areas where the pre-scribing tool receptacle and the sawing tool receptacle require space for movement in the lower depth adjustment position). Due to the inclined edge or wall section, the operator has a better view of the workpiece in the area of the sawing cut or scoring. Furthermore, bevel cuts can be made more easily as a result. The inclined edge section narrows the opening toward the guide surface, making it impossible or only difficult to access tools arranged behind it.

[0021] The covering wall can be a wall that is closed as a whole. The covering wall is made of, for example, an opaque material. It is also possible that the covering wall has transparent sections and / or recesses.

[0022] Preferably, at least one viewing window is arranged in the cover wall, through which at least a portion of the pre-scribing tool and / or a portion of the sawing tool can be seen. The viewing window can be a permanently closed window, for example, sealed by a transparent material, in particular a transparent plastic. This reliably prevents access to the chip space, the tool, or the like through the closed viewing window.

[0023] There are various possibilities for arranging the at least one viewing window. For example, it can be or include a viewing window that is arranged away from the actual working area in which the sawing tool or pre-scribing tool is engaged with the workpiece. However, it is preferred that the at least one viewing window is arranged in an edge area of the cover wall opposite the guide body, in front of which the sawing tool and / or pre-scribing tool protrudes during sawing operation of the handheld machine tool. Preferably, the viewing window extends into a plane parallel to the guide surface of the guide body. This allows, for example, viewing of the area in which the pre-scribing tool penetrates or cuts into the workpiece and / or in which the sawing tool emerges from the workpiece.

[0024] Separate viewing windows can be provided for the pre-scribing tool and the sawing tool. However, it is preferably provided that at least one viewing window has such a longitudinal extension that a portion of the sawing tool and a portion of the pre-scribing tool opposite the sawing tool are visible through the viewing window. The viewing window can have portions of different sizes, e.g., a smaller portion for the pre-scribing tool and a larger portion for the sawing tool.

[0025] The at least one viewing window can also be a recess or opening which can be closed by a covering element. Preferably, it is provided that at the at least one viewing window, the covering element is supported movably between an open position for releasing the viewing window and a covering position for covering the viewing window by means of a bearing, in particular a sliding bearing.

[0026] In the covered position, the cover element preferably covers the working area of the sawing tool and / or pre-scribing tool, in particular the exit area of the sawing tool or pre-scribing tool from the workpiece, and releases it in the open position. The cover element, for example, forms a protective cover. The cover element is preferably supported on the cover wall by means of a sliding bearing. A pivoting bearing or a combined pivoting and sliding bearing is also readily possible. The working area is, for example, a viewing area or an area that is advantageously visible to the operator when using the hand-held sawing tool or when making saw cuts or scoring, in particular for guiding the hand-held tool along the workpiece.

[0027] The covering element can for example not be see-through. Advantageously, however, the covering element is completely or at least partially transparent or see-through, so that a part or the working area of the sawing tool or pre-scribing tool can be seen through the covering element in its covering position.

[0028] The covering element advantageously comprises a plate body or is formed by a plate body.

[0029] In principle, it is possible for the cover element to have, for example, a rectangular outer peripheral contour.

[0030] However, the covering element preferably has a stepped profile. For example, it is advantageous if the covering element has a pre-scribing tool section for covering a portion of the pre-scribing tool and a sawing tool section for covering a portion of the sawing tool. These two sections can be of equal size or have the same length. However, it is advantageous if the pre-scribing tool section and the sawing tool section have different surface and / or length extensions, in particular along a length direction normal to the guide surface and / or along a length direction parallel to the guide surface.

[0031] For example, it is advantageous if the cover wall already explained forms a component of the protective housing.

[0032] In other words, a preferred embodiment of the present invention provides that at least one protective housing, in particular a protective cover, is arranged on the free longitudinal side of the guide body for accommodating the respective sections of the sawing tool and / or pre-scribing tool that do not protrude in front of the guide surface in the direction of the workpiece to be processed. Separate protective housings can be provided for the sawing tool and the pre-scribing tool. However, a common protective housing is preferred, in which the sawing tool and the pre-scribing tool are or can be accommodated.

[0033] The protective housing can be the component of the hand-held sawing machine that projects furthest from the guide surface, transversely to the longitudinal axis, on the side of the sawing tool and / or pre-scribing tool. For example, the at least one protective housing can project 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 does not project in front of the at least one protective housing, at least in the region of the sawing tool or pre-scribing tool transversely to the longitudinal axis of the guide body, and advantageously over the entire length of the hand-held sawing machine relative to the longitudinal axis of the guide body. For example, a portion of the guide body can project laterally outward in the direction of the protective housing, for example as an indicator for identifying a peel line or peel mark.

[0034] Particularly with regard to the guide rails, a very advantageous handling results from the suitable arrangement of the sawing tool and the pre-scribing tool on the lateral outside of the hand-held sawing machine.

[0035] Preferably, a guide contour, in particular a guide receptacle or a guide groove, extending parallel to the longitudinal axis is arranged on the guide surface for supporting against a counter-guide contour of the guide rail, in particular a counter-guide contour of a guide projection or a guide rib, so that the hand-held sawing machine is supported on the counter-guide contour with respect to the feed in the working direction, and the sawing tool and the pre-scribing tool protrude beyond the longitudinal narrow side of the guide rail to its underside. This means that the longitudinal narrow side of the guide rail, at least in the region of the sawing tool and the pre-scribing tool, is not covered by the guide body and is thus clearly visible to the operator.

[0036] Advantageously, the hand-held sawing machine is arranged on the guide rail, the guide body does not protrude transversely to its longitudinal axis beyond the longitudinal narrow sides of the guide rail, and / or only the protective housing of the hand-held sawing machine, which accommodates the sawing tool or pre-scribing tool, protrudes transversely to the longitudinal axis of the guide body beyond the longitudinal narrow sides of the guide rail. This embodiment of the invention offers the advantage, in particular, that the rail edge or the longitudinal narrow sides of the guide rail, but also the sawing tool and / or pre-scribing tool, are clearly visible to the operator.

[0037] The guide rail can be a retrofit component which is an after-purchase accessory for the hand-held sawing machine.

[0038] However, it is advantageous if the hand-held sawing machine comprises a guide rail, wherein the guide rail is advantageously a component separate from the hand-held sawing machine, that is, a component that can be detached from the hand-held sawing machine. Furthermore, the guide rail can also be designed in the manner of a cross-cutting rail, that is, a guide rail on which the guide means can be linearly displaced back and forth in an oscillating manner in the working direction, but for working operation is connected to the hand-held sawing machine by means of the aforementioned sliding bearing and is held on the guide surface by means of a rear gripping contour with respect to a force element perpendicular to the guide surface.

[0039] It is also possible that the hand-held sawing machine forms part of a system comprising a hand-held sawing machine and a guide rail.

[0040] It has already been explained that the sawing tool holder and thus the sawing tool and / or the pre-scribing tool holder and thus the pre-scribing tool are preferably depth-adjustable relative to the guide surface. However, bevel adjustment is also preferred, for example as follows: in a hand-held sawing machine, it is advantageously provided that the sawing tool holder, in particular the sawing unit as a whole, and / or the pre-scribing tool holder, in particular the pre-scribing unit as a whole, are pivotably mounted on the guide mechanism by means of a bevel bearing assembly about a bevel axis.

[0041] In principle, it is possible to arrange the bevel axis at a transverse distance from the free longitudinal side of the guide body. However, it is preferred that the bevel axis runs directly adjacent to and parallel to the free longitudinal side of the guide body. It is preferred that the bevel axis runs directly adjacent 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 hindered when pivoting about the bevel axis. The sawing tool and the pre-scribing tool can be pivoted, so to speak, around the free longitudinal side of the guide body.

[0042] Furthermore, it is advantageous if the sawing depth adjustment support and / or the pre-scribing depth adjustment support are arranged on a carrier which is in particular designed as a cover and / or protective housing, said carrier being arranged between the bevel supports of the bevel support assembly which are located in front in the working direction and in the rear in the working direction.

[0043] Furthermore, the operation of the handheld sawing machine is simplified by effective dust guides. It is particularly advantageous if the sawing tool and the pre-scribing tool are kept as free as possible of dust, particles, shavings, and the like, at least in the field of view, which is improved precisely by the arrangement of the two tools on the longitudinal sides of the handheld machine tool. It is particularly advantageous if both the sawing unit and the pre-scribing unit are provided with dust guides. Preferably, the handheld sawing machine provides for the pre-scribing unit to include a pre-scribing dust guide for removing particles generated when the pre-scribing tool is used to create a score in the workpiece.

[0044] The basic concept here is to remove dust directly in the area of the pre-scribing unit. This means that particles generated there are effectively conveyed away from the pre-scribing tool, thus providing a cleaner working area for the operator. The workpiece remains uncontaminated. The operator is not bothered by dust. When particles, dust, and shavings are removed by the pre-scribing dust removal mechanism, the working area in which the pre-scribing tool penetrates or exits the workpiece can be better viewed.

[0045] In the following description, the terms dust and particles are used equivalently. Dust is understood to mean particles, dust and sawdust.

[0046] Although it is in principle possible to arrange the pre-scribing tool freely on the guide device, particularly in the case of an embodiment as a milling tool or the like, it is preferably provided in the handheld machine tool that it has a pre-scribing tool receiving space for receiving the pre-scribing tool, said pre-scribing tool receiving space being fluidically connected to a dust removal connection, particularly suitable and designed for connecting a suction hose, via which particles can flow out of the pre-scribing tool receiving space.

[0047] It is also advantageous with regard to the sawing tool if the receiving space is provided for receiving the sawing tool. Preferably, the handheld sawing machine has a sawing tool receiving space for the sawing tool.

[0048] The pre-scribing tool receiving space and / or the sawing tool receiving space form, for example, a dust chamber or a protective space, in which the pre-scribing tool or sawing tool is received, in particular with its section that does not protrude in front of the guide surface for machining the workpiece. In the active position, the section of the pre-scribing tool or sawing tool that is intended for machining the workpiece protrudes in front of the respective receiving space.

[0049] Preferably, the dust removal connection for the sawing tool receiving space is fluidically connected to the pre-scribing tool receiving space via a dust removal channel. The dust removal channel can run, for example, in a protective hood or protective housing of the handheld sawing machine.

[0050] The dust removal connection for the sawing tool receiving space is preferably arranged at the rear in the working direction on the handheld sawing machine.

[0051] Advantageously, the handheld sawing machine has a cover wall for covering the sawing tool receptacle and / or pre-scribing tool receptacle, a viewing window being arranged in the cover wall through which at least a portion of the pre-scribing tool and / or sawing tool can be viewed. A cover element is movably supported on the viewing window between an open position, releasing the viewing window, and a covering position, covering the viewing window, by means of a bearing, particularly a sliding bearing. In the covering position, the cover element preferably covers a working area of the sawing tool and / or pre-scribing tool, particularly an exit area where the sawing tool or pre-scribing tool exits the workpiece, and releases it in the open position. The cover element, for example, forms a protective cover. The cover element is preferably supported on the cover wall by means of a sliding bearing. A pivoting bearing or a combined pivoting and sliding bearing is also readily possible. The working area is, for example, a viewing area or an area that is advantageously visible to the operator when using the handheld sawing machine or when making sawing cuts or scoring cuts, particularly for guiding the handheld machine tool along the workpiece.

[0052] The covering element can for example not be see-through. Advantageously, however, the covering element is completely or at least partially transparent or see-through, so that a part or the working area of the sawing tool or pre-scribing tool can be seen through the covering element in its covering position.

[0053] The covering element advantageously comprises a plate body or is formed by a plate body.

[0054] In principle, it is possible for the cover element to have, for example, a rectangular outer peripheral contour.

[0055] However, the covering element preferably has a stepped profile. For example, it is advantageous if the covering element has a pre-scribing tool section for covering a portion of the pre-scribing tool and a sawing tool section for covering a portion of the sawing tool. These two sections can be of equal size or have the same length. However, it is advantageous if the pre-scribing tool section and the sawing tool section have different surface and / or length extensions, in particular along a length direction normal to the guide surface and / or along a length direction parallel to the guide surface.

[0056] Advantageously, the sawing tool receiving space and the pre-scribing tool receiving space are separated from each other by at least one partition wall, which is situated, for example, between mutually opposite sides, in particular narrow sides, of the pre-scribing tool and the sawing tool.

[0057] In particular, when the sawing tool and / or pre-scribing tool are oriented normal to the guide surface, the separating wall preferably extends as far as the guide surface. Preferably, the separating wall comprises a separating wall section, which in particular directly adjoins the guide surface. Both measures facilitate the separating wall separating the chip space from the pre-scribing tool and the sawing tool directly in the area of the workpiece surface (i.e., where the chips are generated).

[0058] In this regard, it should be noted that the pre-scribing tool and the sawing tool are preferably disc-shaped saw blades. During operation, the pre-scribing tool and the sawing tool rotate in opposite directions, i.e., when making the score or saw cut in the workpiece, they generate shavings that can be thrown onto each other. At least one separating wall ensures that the shavings generated by the sawing tool do not flow into the pre-scribing tool and vice versa.

[0059] The separating wall can be a single-piece separating wall. It is also possible to provide multiple separating walls. A preferred embodiment provides for at least one separating wall to have a fixed separating wall section and a separating wall section that is movable relative to the fixed separating wall section. Although spacing can in principle be present between the separating wall sections, it is advantageous if the separating wall sections are arranged close to one another and, in one or more, preferably every, relative position relative to one another (which is provided for the operation of the handheld sawing machine), directly or in such a way as to adjoin or overlap one another, thereby forming a closed or substantially closed flow wall along which a particle flow containing particles generated by the pre-scoring tool or sawing tool can flow. In other words, the flow wall can be substantially or completely closed in each relative position that the separating wall sections can assume relative to one another. However, it is also possible for the separating wall sections to form a flow wall only when the handheld sawing machine is adjusted for operation. In other words, when, for example, the aforementioned cover element is in the covering position, the separating wall sections form a flow-tight or substantially closed flow wall.

[0060] However, intermediate spaces between the separating wall segments, such as slots or gaps, are possible. Preferably, however, the intermediate spaces between the separating wall segments are oriented and / or arranged such that the particle flow is deflected through the intermediate spaces and does not penetrate the intermediate spaces.

[0061] However, it is advantageous if the partition wall segments are designed to engage with one another. For example, it is advantageous if one of the partition wall segments has a particularly U-shaped partition wall receptacle for engaging with the other partition wall segment when the movable partition wall segment is adjusted toward the stationary partition wall segment, and / or if the partition wall segments are designed to be telescopic.

[0062] It is particularly preferred that the movable partition wall section is arranged on the cover element. For example, the movable partition wall section projects at an angle from a cover section of the cover element, which, in the covering position, covers the working area of the sawing tool and / or pre-scribing tool. For example, the partition wall section is arranged between the sawing tool section and the pre-scribing tool section of the cover element.

[0063] Advantageously, the handheld sawing machine has a flow guide surface, in particular an inlet bevel and / or an impact surface, arranged in particular at the separating wall, at or next to the exit area of the pre-scribing tool from the workpiece. The flow guide surface is, for example, opposite the narrow side of a disk-shaped pre-scribing tool.

[0064] It is also advantageous that the sawing unit has a sawing dust removal mechanism for removing particles produced when the sawing tool is introduced into the sawing cut. Thus, that is to say, shavings, dust and particles produced by the sawing tool can also be effectively removed from the working area of the sawing tool.

[0065] It is preferably provided that the sawing dust removal device has a dust removal connection which is particularly suitable and designed for connecting a suction hose, said dust removal connection being fluidically connected to the sawing tool receiving space so that particles can flow out of the sawing tool receiving space through the dust removal connection. Thus, particles can flow out of the sawing tool receiving space and the pre-scribing tool receiving space, for example, be sucked away, via a single dust removal connection.

[0066] The dust removal connection, which is fluidically connected to the sawing tool receiving space, is advantageously also fluidically connected to the pre-scribing tool receiving space, so that particles generated by the pre-scribing tool can flow out of the pre-scribing tool receiving space via the dust removal connection.

[0067] The dust removal coupling that is fluidly connected to the sawing tool receiving space can also be a dust removal coupling that is separate from the dust removal coupling that is fluidly connected to the pre-scribing tool receiving space. Thus, the handheld sawing machine has two dust removal couplings, namely for the sawing tool receiving space and the pre-scribing tool receiving space.

[0068] The dust removal connection for the pre-scribing tool receiving space and / or the sawing tool receiving space comprises, for example, a tube body and / or a connecting piece onto which a suction hose can be plugged. The suction hose is, for example, led to a particularly mobile vacuum cleaner, in particular a workshop vacuum cleaner, or is a component of a vacuum cleaner. The suction hose can also be a component of a stationary suction device. A form-fitting contour for the form-fitting connection of the suction hose or a connecting piece of the suction hose is preferably provided at the dust removal connection. The tube body or the connecting piece can be rotatably mounted on the hand-held machine tool, so that the suction hose connected to the tube body or the connecting piece can be twisted relative to the hand-held sawing machine.

[0069] Advantageously, the dust removal connection portion connected to the flow of the sawing tool accommodating space is connected to the flow of the sawing tool accommodating space via a dust removal channel, wherein the dust removal channel and the dust removal channel connected to the flow of the pre-scratching tool accommodating space are separated at least in sections, in particular in the exit area (where the pre-scratching tool and the sawing tool exit from the workpiece) by an intermediate wall.

[0070] The intermediate wall can be a very short intermediate wall. For example, it is advantageous that the intermediate wall only extends up to the sawing tool receiving space.

[0071] It is also possible that the intermediate wall extends along the sawing tool receiving space as far as the dust removal connection, so that the particle flows generated by the sawing tool and the pre-scribing tool mix with each other on the removal side initially in the region of the dust removal connection.

[0072] The sawing tool receiving space and the pre-scribing tool receiving space are advantageously provided in a common protective housing for receiving the sawing tool and the pre-scribing tool. It is also possible to provide separate protective housings for the sawing tool and the pre-scribing tool.

[0073] Furthermore, it is advantageously provided that the sawing tool holder, in particular the sawing unit as a whole, is mounted movably on or in relation to the guide means by means of a sawing depth adjustment support between an upper depth adjustment position and at least one lower depth adjustment position, wherein the sawing tool protrudes further in front of the guide surface in the lower depth adjustment position than in the upper depth adjustment position. This makes it possible, for example, to make saw cuts of different depths in the workpiece.

[0074] It is further preferred that the pre-scribing tool holder, in particular the pre-scribing unit, is movably supported as a whole on the guide mechanism or in relation to the guide mechanism by means of a pre-scribing depth adjustment support that is separate from the sawing depth adjustment support between at least one active position, in which the pre-scribing tool arranged on the pre-scribing tool holder projects in front of the guide surface, and an inactive position, in which the pre-scribing tool is adjusted back behind the guide surface. This allows the pre-scribing tool to be adjusted to the inactive position, for example, when no score is to be produced.

[0075] The pre-scribing tool and / or the sawing tool are preferably designed as saw blades, in particular circular saw blades. However, it is also possible in principle for the sawing tool to be, for example, a wire saw blade or a similar, non-circular type of saw blade. Furthermore, the pre-scribing tool can, for example, also include or be formed by a milling head or a milling tool.

[0076] A preferred embodiment is a sawing tool and a pre-scribing tool as a saw blade. An advantageous embodiment provides that the ratio of the outer diameter of the sawing tool to the outer diameter of the saw drive motor is greater, in particular at least 1.5 times greater, preferably twice greater, and even more preferably at least 2.5 times greater, than the ratio of the outer diameter of the pre-scribing tool to the outer diameter of the pre-scribing drive motor.

[0077] A handheld sawing machine is a sawing machine that is manually guided along a workpiece. The machine can be guided freely over the workpiece, that is, can be operated without guide rails. However, operation with guide rails is preferred. The handheld machine tool is preferably a plunge saw and / or does not have a protective cover for a section of the sawing tool and / or pre-scribing tool that freely protrudes beyond the guide surface.

[0078] The sawing unit and the pre-scribing unit are arranged on the upper side of the guide mechanism, opposite the guide surface. The guide mechanism comprises, for example, a so-called sawing table. The guide mechanism or guide body preferably comprises a plate body, on one side of which the guide surface is arranged, and on the side opposite the guide surface, or on the upper side, the sawing unit and the pre-scribing unit are arranged. The guide surface preferably has guide receptacles, such as longitudinal grooves or the like, for guiding guide ribs or guide protrusions of the rail.

[0079] The sawing drive motor and / or the pre-scribing drive motor are preferably electric motors, in particular universal motors or brushless electronically commutated motors or DC motors. Different motor types can be used as sawing drive motors and pre-scribing drive motors, for example, electronically commutated motors as sawing drive motors and DC motors as pre-scribing drive motors. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] The embodiments of the present invention are then explained with reference to the accompanying drawings, wherein: Figure 1 An oblique view from an oblique front perspective of a hand-held sawing machine with a sawing unit and a pre-scribing unit in an upper depth adjustment position is shown, Figure 2 Show the basis Figure 1 The handheld sawing machine, however, in the lower depth adjustment position, Figure 3 Shown on the guide rail in an angled position and viewed from behind Figure 1 、 2 Handheld sawing machines, Figure 4 Shown from Figure 3 Detailed view from the front onto the lower part of the hand-held sawing machine and onto the guide rail, wherein the guide body of the hand-held machine tool and the guide rail engage with each other with an additional rear gripping contour, Figure 5 A variant of the hand-held sawing machine according to the preceding figures is shown, with a pre-scoring unit which can be pivoted about the bevel axis separately from the sawing unit or with a pre-scoring unit which is fixed in position relative to the bevel axis. Figure 6 Show the basis Figure 1 Side view of a hand-held sawing machine, for example in viewing direction BR1 with an open protective housing and its sawing unit in the upper depth adjustment position, Figure 7 Show the basis Figure 6 The right part of the view shows the sawing unit in the lowest depth adjustment position, while the pre-scoring unit is inactive. Figure 8 Show the basis Figure 6 、 7 , however, with the sawing unit adjusted to the lowest depth adjustment position and the pre-scoring unit adjusted to the active position, Figure 9 Show the basis Figure 8 , however, with the sawing unit adjusted to the pre-scoring depth adjustment position only and the pre-scoring unit adjusted to the active position, Figure 10 Shown in the release position is only the pre-scored depth stop mechanism, which enables the Figure 8 The adjustment of the sawing unit, as a whole Figure 10 Detail D2 of a hand-held sawing machine is additionally shown obliquely from the rear, Figure 11 Show the basis Figure 10However, the depth stop is only pre-scored in its stop position, which corresponds to the only pre-scored depth adjustment position of the sawing unit, Figure 12 From the front, for example Figure 1 The viewing direction shows a detailed view of the pre-scored unit, Figure 13 Shown in the active position according to Figure 12 The pre-scoring unit, however, is viewed from the rear, for example, corresponding to the Figure 3 The sight direction in the figure shows that Figure 14 Show the basis Figure 13 , wherein the pre-scoring unit is adjusted into the deactivated position, Figure 15 Shown by Figure 13 A pre-scored section of the assembly, for example along the section line AA through the deactivation mechanism thereof, Figure 16 Shown obliquely from the front to the Figure 1 View of the pre-scoring unit of a handheld sawing machine. Figure 17 For example, along the section line BB through the Figure 16 A partial cross section of a pre-scored unit, wherein, in order to illustrate the Figure 17 Detail D3 shown in FIG, additionally showing a section through the hand-held sawing machine as a whole in a small illustration, Figure 18 A side view of the hand-held sawing machine according to the previous figures is shown with an open protective housing, for example corresponding to the embodiment according to Figure 6 View, Figure 19 The cover of the protective housing is shown from the front obliquely, for example according to Figure 1 perspective drawing, Figure 20 A variant of a hand-held sawing machine is shown. Figure 18 View, Figure 21 A further variant of a hand-held sawing machine is shown from one side, for example corresponding to the Figure 1 The sight direction BR1 in Figure 22 The hand-held sawing machine according to the previous figure is shown from an oblique front, wherein the protective housing is provided with a Figure 19 The lid is closed, Figure 23 Show the basis Figure 22 Detail D4 of the front with a view of the cover element adjusted into the open position, Figure 24 Show the basis Figure 23 , however, with the covering element adjusted into the covering position, Figure 25 Show the basis Figure 19 The partial area of the cover with the cover element adjusted into the open position corresponds to the Figure 23 Partial view of Figure 26 Show the basis Figure 25 , however, with the covering element adjusted into the covering position, Figure 27 Shown from behind Figure 1 Handheld sawing machine with pre-scored handle body, Figure 28 Shown from the front Figure 27 Handheld sawing machines, Figure 29 Shown is a handle body with an additional pre-scored portion according to Figure 27 Variants of hand-held sawing machines, Figure 30 Shown from the front Figure 29 Handheld sawing machines, Figure 31 A side view of the hand-held sawing machine according to the previous figure is shown with the fixing mechanism in the fixed position, Figure 32 Show the basis Figure 31 A perspective oblique view of the fixing mechanism of a handheld sawing machine, Figure 33 A schematic view of the hand-held sawing machine according to the previous figure is shown from one side, Figure 34 Showing the basis with another driving mechanism Figure 33 Variants of hand-held sawing machines, Figure 35 A schematic illustration of a hand-held sawing machine with a pre-scribing unit that can be manually and individually manipulated is shown, Figure 36 A hand-held sawing machine with a pre-scoring unit is shown, which can be adjusted by means of a motor, Figure 37 A hand-held sawing machine with a pre-scribing unit that can be manually operated via a force-transmitting element is shown, Figure 38 A variant of the pre-score unit with an alternative pre-score depth adjustment device and an alternative deactivation mechanism is shown in a perspective oblique view in the deactivated position, Figure 39 Show the basis Figure 38 The pre-scored unit, however, in the activated position, Figure 40 Shown along the Figure 39 The section line CC in the figure passes through the pre-marked section of the unit. Figure 41 Show the basis Figures 38-40 Pre-marked exploded view of the unit, Figure 42 A pre-scribing tool with four scribing teeth is shown, Figure 43 Show including according to Figure 42 A system of pre-scoring tools for cutting along the cutting line DD and sawing tools, Figure 44 Shown from Figure 43 Details of D5, Figure 45 Shown in perspective and tilted according to Figure 42 Pre-scoring tools, Figure 46 A pre-scribing tool with three scribing teeth is shown, Figure 47 A pre-scribing tool with a scoring tooth, alternatively with two scoring teeth, is shown, Figure 48 Other embodiments of the scoring teeth of the pre-scribing tool are shown, for example according to Figure 44 Detail D5, with additional cutting edge segments angled relative to each other, Figure 49 An alternative design of the scoring teeth is shown, for example according to Figure 48 The scoring tooth type, however, has an additional cutting edge that is concave, Figure 50 A further embodiment of the scoring tooth with a convex additional cutting edge is shown, and Figure 51 The sawing tool is shown from one side. DETAILED DESCRIPTION

[0081] The handheld sawing machine 10 is designed, for example, in the manner of a plunge saw, but can also, for example, have a swing hood or a similar other protective covering and thus be a swing hood saw.

[0082] The handheld sawing machine 10 has a sawing unit 11 with a sawing drive motor 12, which is accommodated in a motor housing part 28 of a sawing unit housing 13. The sawing drive motor 12 drives a sawing tool receptacle 14 directly or via a transmission mechanism (not visible in the drawings), in which a sawing tool 15 is arranged or can be arranged. For example, a retaining screw or retaining element 14A is used to retain the sawing tool 15 in the sawing tool receptacle 14.

[0083] By means of the sawing depth adjustment support 16, the sawing unit 11 can be pivoted as a whole about the depth adjustment axis TS relative to a guide 17 on which the sawing unit 11 is arranged. By means of this pivoting movement, the sawing tool 15 can be adjusted between an upper depth adjustment position OT and a plurality of lower depth adjustment positions, for example according to Figure 2 Or the lowermost depth setting position UT of the sawing tool 15 8. In the lower depth setting position UT, the sawing tool 15 projects in front of the guide surface 19 of the guide body 18 of the guide mechanism 17, for example in order to introduce a saw cut into the workpiece W.

[0084] By means of the guide surface 19 , the guide body 18 and thus the hand-held sawing machine 10 as a whole can be guided in the working direction AR, for example directly along the workpiece top side WO of the workpiece W. The guide surface 19 extends with a longitudinal axis L parallel to the working direction AR.

[0085] However, the guide body 18 can also be guided, for example, along the upper side or guide surface 202 of a guide rail 200 , which can be placed with its lower side 201 onto the workpiece W. As a result, particularly precise and straight saw cuts can be made in the workpiece W.

[0086] The guide rail 200 has a longitudinal shape with longitudinal narrow sides 203, 204 extending along the longitudinal axis LS of the guide rail 200, along which the working direction AR is oriented, between an end side 207 at the rear in the working direction AR and an end side 208 at the front in the working direction AR. The sawing tool 15 can be inserted into the workpiece W via the longitudinal narrow sides 204.

[0087] Furthermore, parallel to the longitudinal axis LS, a counter-guide contour 206 in the form of a longitudinal rib and, optionally, a receiving groove 205 extend. The receiving groove 205 serves, for example, to receive auxiliary devices, clamping means 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 is intended to engage with a guide contour 216 on the guide surface 19 of the guide body 18. The guide contour 216 is designed, for example, as an elongated receiving groove 217 extending along the longitudinal axis L of the guide body 18.

[0088] An alternative design of the guide rail 200 is schematically illustrated, for example, in the form of guide rail 200A. The guide rail 200A has a rear gripping projection 210 that projects forward of the guide surface 202 and extends laterally from at least one rear gripping leg 211, preferably two rear gripping legs 211 facing each other, forming, for example, a T-shaped configuration. The rear gripping leg 211 engages in a receptacle 220, optionally provided on the guide surface 19, which has a rear gripping receptacle 221. For example, a supporting leg 222 projects in the plane of the guide surface 19 toward the receptacle 220, which can be gripped from behind by the rear gripping leg 211, which engages in the rear gripping receptacle 221. This maintains the guide mechanism 17 on the guide rail 200A in a force direction perpendicular to the guide surface 18, while still being displaceable along the guide rail 200A in the working direction AR. The receiving portion 220 and the rear gripping projection 210 have a longitudinal shape and extend in the direction of the longitudinal axis L or LS.

[0089] The guide body has a longitudinal side, subsequently referred to as the tool longitudinal side 18A, on which the sawing tool 15 is arranged, and a tool-free longitudinal side 18B, which runs parallel to the longitudinal side 18A and extends like the longitudinal sides between the front and rear end sides 18C, 18D of the guide body 18.

[0090] The sawing unit 11 is arranged on the upper side 19A of the guide mechanism 17 or guide body 18, opposite the guide surface 19. The guide body 18 is formed, for example, by a guide plate or is plate-shaped. If the guide surface 19 is essentially flat (except for the receiving contours arranged thereon, in particular, the receptacle 220 and / or the guide contour 216), the upper side 19A can carry functional components and / or be reinforced by rib structures. It is particularly possible for the operator to grasp and / or manipulate the upper side 19A to guide the handheld sawing machine 10 (in particular, in the area of the handle portion 18F, near the front end 18C), for example, to apply force perpendicular to the guide surface 19 in the direction toward the workpiece W or the guide rail 200. The handle portion 18F can, for example, be flat or include a flat surface. Advantageously, the handle portion 18F has a gripping recess. However, the handle portion 18F can also, for example, include a gripping element 218, such as a lever-shaped or knob-shaped handle.

[0091] The sawing unit 11 as a whole is loaded in the direction of the upward depth adjustment position OT by means of a sawing unit spring assembly 20. The sawing unit spring assembly 20 comprises, for example, a coil spring 20A. The coil spring 20A or the spring assembly 20 is supported on one side on the upper side 19A of the guide mechanism 17 and on the other side on the lower side of the sawing unit housing 13.

[0092] In addition to the depth adjustability about the depth adjustment axis TS, the sawing unit 11 can also be pivoted about the bevel axis G.

[0093] The handheld sawing machine 10 has a carrier 40. The carrier 40 comprises a protective housing 29. The sawing unit 11 is held on the carrier 40.

[0094] The carrier 40 and / or the protective housing 29 are mounted on the guide mechanism 17 so as to be pivotable about an angled axis G, which extends parallel to the longitudinal axis L of the guide mechanism 17, namely by means of the angled bearing 21 at the front in the working direction AR and the angled bearing 23 at the rear in the working direction of the angled bearing assembly 21A. The angled bearings 21, 22 are arranged close to or directly at the front and rear end faces 18C, 18D of the guide body 18, i.e., they form, as it were, the frontmost and rearmost components of the hand-held sawing machine 10 in the working direction AR.

[0095] The bevel supports 21 , 22 each comprise a support base 23 , in particular in the form of a plate, which projects upward from the upper side 19A of the mechanism 10 and on which a support body 24 , also preferably designed as a plate, is pivotably supported about a bevel axis G.

[0096] The bevel supports 21, 22 can be fixed in a plurality of pivoted positions about the bevel axis G by means of fixing means 25. The fixing means 25 comprises, for example, a clamping screw 25A, by means of which the support base 23 and the support body 24 can be forced toward each other into a clamping position, so that they are held to each other in a force-fitting and / or friction-fitting and / or form-fitting manner (for example, by means of teeth engaging with each other) and fix the carrier 40 in the adjusted angular position about the bevel axis G on the guide mechanism 17.

[0097] Alternatively to the concept of the carrier 40, on which the sawing unit 11 and the pre-scoring unit 31 are arranged so as to be simultaneously rotatable about the bevel axis G by means of the bevel support assembly 21A, a concept is also possible in which the pre-scoring unit 31 is swivellable about the bevel axis G independently of the sawing unit 11. For this purpose, for example, the bevel support 22A is arranged as in accordance with Figure 5 As in the embodiment of the handheld sawing machine 10A, the pre-scoring unit 31A, which corresponds to the pre-scoring unit 31, is located between the sawing unit 11. It is obviously advantageous that the bevel support 22A, like the bevel supports 21 and 22, can also be fixed by a fixing device 25, for example, by a clamping screw fastener, so that the relative position of the sawing unit 11 and the pre-scoring unit 31 about the bevel axis G can be fixed.

[0098] But according to Figure 5The embodiment can also be provided such that, although the sawing unit 11 can be pivoted about the bevel axis G, the pre-scoring unit 31A is arranged fixedly relative to the guide mechanism 17 with respect to the bevel axis G. In this case, the bevel support 22A is also advantageously provided between the pre-scoring unit 31 and the sawing unit 11.

[0099] The carrier 40 comprises a protective housing 29 having a sawing tool receiving space 48 for receiving the sawing tool 15. The sawing tool 15 is received in the sawing tool receiving space 48 so as to be pivotable about a depth adjustment axis TS, wherein in the upper depth adjustment position OT it does not protrude beyond the sawing tool receiving space 48, whereas in the lower depth adjustment position (e.g., in the lowermost depth adjustment position UT) it protrudes as far as possible beyond the protective housing 29 and the guide surface 19.

[0100] The sawing tool receptacle 14 is driven by the sawing drive motor 12 in a rotational direction about the tool rotation axis DS, so that the sawing tool 15 penetrates the workpiece W from its underside WU and produces a saw cut SAE. The sawing tool 15 is a saw blade, whose teeth are inclined in the rotational direction toward the guide surface 19 and are driven so that the teeth can cause a crack when exiting the workpiece upper side WO. To prevent this problem, the handheld sawing machine 10 includes a pre-scribing module 30.

[0101] The pre-scribing module 30 includes a pre-scribing unit 31, which is arranged upstream of the sawing unit 11 in the working direction AR. Like the sawing unit 11, the pre-scribing unit 31 is arranged on the carrier 40. A pre-scribing unit drive motor 32 drives a pre-scribing unit tool receptacle 34 about the tool rotation axis DV, but in a direction of rotation opposite to the tool rotation axis DS. The pre-scribing unit drive motor 32 forms a pre-scribing unit drive 32A.

[0102] A pre-score tool 35, for example a pre-score saw blade, can be releasably secured to the pre-score tool receptacle 34, in particular by means of a retaining element 34A, in particular a retaining screw. The pre-score tool 35 is driven in a rotational manner such that its teeth cut into the workpiece W from its workpiece top side WO and produce a score RI that is aligned with the subsequent saw cut produced by the sawing tool 15 in the workpiece W. The score is slightly wider than the subsequent saw cut, so that the sawing tool 15 does not touch the longitudinal edge of the score, and thus no or little cracking, no or little chip removal, or the like occurs on the workpiece top side WO.

[0103] Arranged on the carrier 40 is a pre-scribing unit housing 33, in which the essential components of the pre-scribing unit 31 are protected. Thus, the pre-scribing unit housing 33 is fixed in position relative to the carrier 40 and also relative to the protective housing 29, while the movable components of the pre-scribing unit 31, particularly the pre-scribing unit drive motor 32 and the transmission mechanism between the pre-scribing unit drive motor 32 and the pre-scribing unit tool receptacle 34, are movably accommodated within the interior of the pre-scribing unit housing 33. The pre-scribing unit drive motor 32 is advantageously accommodated in a motor housing 33A that is separate from the pre-scribing unit housing 33. The motor housing 33A is movable relative to the pre-scribing unit housing 33.

[0104] The pre-score unit 31 comprises a pre-score carrier 80, which is supported on the carrier 40 about a depth adjustment axis TV by means of a pre-score depth adjustment support 36. The pre-score tool receptacle 34 is likewise accommodated in the interior of the protective housing 29, i.e., in the pre-score receiving space 49 of the same protective housing.

[0105] The pre-scored portion carrier 80 has, for example, a block-like or square shape. The pre-scored portion carrier 80 has, for example, a longitudinal shape. The longitudinal axis of the pre-scored portion carrier 80 or the pre-scored portion carrier 80 as a whole, for example, is inclined at an acute angle relative to the guide surface 19, depending on its respective pivot position relative to the depth adjustment axis TV, or in some pivot positions is parallel to the guide surface 19 relative to the depth adjustment axis TV.

[0106] The pre-score section carrier 80 comprises, at opposite longitudinal end regions, a support section 81 (which is supported about the depth adjustment axis TV at the pre-score section depth adjustment support 36) and a motor section 82 having a motor receptacle 83, in which the pre-score section drive motor 32 is held. A transmission mechanism 84, such as a stepped transmission or the like, can be arranged between the pre-score section drive motor 32 and the pre-score section tool receptacle 34. For example, it is possible that the transmission mechanism 84 provides a lateral spacing between the tool rotation axis DV and the motor rotation axis DM of the pre-score section drive motor 32. For example, the motor rotation axis DM is spaced farther from the guide surface 19 than the tool rotation axis DV, thereby being closer to the guide surface 19. This makes it possible, for example, for the pre-score section drive motor 32 to have a larger diameter than in a design in which its motor rotation axis and tool rotation axis DV are aligned with each other in order to generate a correspondingly greater torque.

[0107] To manipulate the sawing tool receptacle 14 between one of the upper depth adjustment position OT and the lower depth adjustment position UT, the sawing unit 11 as a whole can be pivoted about the depth adjustment axis TS. For this purpose, the operator can, for example, grasp a handle 26 and / or 27 arranged on the sawing unit housing 13. The handle 26 is arranged on the sawing unit 11 at the rear in the working direction AR, while the handle 27 is arranged on the sawing unit 11 in the front region of the sawing unit housing 13 in the working direction AR. Both handles 26 and 27 have a longitudinal shape. The handle 26 has a longitudinal axis L26 that runs substantially parallel to the longitudinal axis L of the guide mechanism 17, while the longitudinal axis L27 of the handle 27 runs transversely to the longitudinal axis L. In other words, the operator can generate a torque about the depth adjustment axis TS, for example by applying pressure to the handle 27, thereby pivoting the sawing tool receptacle 14 about the depth adjustment axis TS and moving the sawing tool 15 in front of the guide surface 19.

[0108] The handle 27 simultaneously forms an operating element 27A, by means of which the operator can not only operate the sawing unit 11 or the sawing tool holder 14 between its depth adjustment positions, but can also operate the pre-scoring unit 31. The operating element 27A (that is, the operating handle 27B) acts on the pre-scoring unit 31 via the driver 70 to adjust it between an active position AP, in which the pre-scoring tool 35 projects in front of the guide surface 19, and an inactive position IP, in which the pre-scoring tool 35 is adjusted back behind the guide surface 19 or in any case does not project in front of it.

[0109] The pre-score carrier 80, and thus the pre-score tool receptacle 34, is loaded in the direction toward the inactive position IP by the pre-score unit spring assembly 39. When the saw unit 11 is actuated from the upper depth adjustment position OT toward the lower depth adjustment position UT, the entrainment mechanism 70 entrains the pre-score unit 31 in the opposite direction (i.e., back to the active position AP). Thus, when the operator adjusts the hand-held sawing machine 10, so to speak, to the lower depth adjustment position or sawing position relative to the two spring assemblies 20, 39, he or she is working to adjust both the sawing tool 15 and the pre-score tool 35 into the working position or sawing position in which they engage with the tool W. The two spring assemblies 20, 39 act in opposite directions, so to speak, into the inactive or safety position, acting in a safety sense, i.e., in the sense that the sawing tool 15 and the pre-score tool 35 are adjusted back behind the guide surface 19.

[0110] The drive mechanism 70 includes an actuation transmitter 71 on the sawing unit 11, which acts on an actuation receiver 72 on the pre-scoring unit 31. The actuation transmitter 71 is designed as a guide rail 73 and includes a guide rail 74 along which a guide rail follower 75, such as a roller or a test roller, of the pre-scoring unit 31 is guided (e.g., rolls). Advantageously, the actuation transmitter 71 and the actuation receiver 72 are arranged outside the protective housing 29.

[0111] The guide slot 74 comprises a pre-score activation section 76 and a pre-score retaining section 77, with an apex 76A disposed therebetween. The pre-score retaining section 77 of the guide slot 74 or slot track extends along a radius R about the depth adjustment axis TS. In contrast, the pre-score activation section 76 and the pre-score retaining section 77 extend at an angle such that the slot follower 75 guided along the retaining section 77 actuates the pre-score unit 31, in particular the pre-score carrier 80, in such a way that the pre-score tool receptacle 34 and thus the pre-score tool 35 are actuated from the inactive position IP along the motion path BB in the direction of the active position AP.

[0112] The pre-scribing activation section 76 is designed such that when the sawing tool receptacle 14 is adjusted from the upper depth setting position OT in the direction of the lower depth setting position UT, the pre-scribing tool 35 is adjusted ahead of the sawing tool 15 from the inactive position IP into the active position AP, in which it projects beyond the guide surface 19 with a preferably adjustable maximum penetration depth or scoring depth Rmax for engagement in the workpiece W. The scoring depth Rmax or the active position AP is already set or can be adjusted when the sawing tool 15 or the sawing tool receptacle 14 or the sawing unit 11 assumes the depth setting position RT, in which the sawing tool 15 does not yet project beyond the guide surface 19. This adjustment of the handheld sawing machine 10 relates to a pure scoring operation or pre-scribing operation, in which only the pre-scribing unit 31 or the pre-scribing tool 35 is used to introduce a score into the workpiece W.

[0113] To prevent the operator from having to manually balance the sawing unit 11 in the depth setting position RT during the pure scoring or pre-scoring operation, a pre-scoring depth stop 78 is provided. It comprises a stop member 79 movably mounted on the sawing unit 11, for example slidably, and adjustable between a stop position TA and a release position TF, in which it abuts against a counter-stop 79A arranged on the protective housing 29. In the release position, the stop member 79 can be moved past the counter-stop 79A in order to actuate the sawing unit 11 and thus the sawing tool receptacle 14 from the scoring depth setting position RT further in the direction of one of the lower depth setting positions UT, in which the sawing tool 15 projects beyond the guide surface 19 for cutting into the workpiece W. For example, the stop member 79 is displaceably mounted transversely to the longitudinal axis L on the motor housing part 28 or the sawing unit housing 13.

[0114] The stop member 79 is advantageously arranged close to the handle 26, in particular in its upper region farthest from the guide mechanism 17, so that an operator gripping the handle 26 can operate the stop member 79 with his thumb in a sliding guide between a stop position TA and a release position TF, not shown in greater detail.

[0115] Furthermore, a main switching element actuating element 60 is arranged at the upper region of the handle 26 or the region furthest from the guide 17 for actuating a main switching element 60A, by means of which the sawing drive motor 12 and the pre-score drive motor 32 can be switched on and off.

[0116] The handheld sawing machine 10 can be connected, for example, via a connecting line 67 to an electrical energy supply network (for example with an AC voltage of 120 V, 230 V or the like) for supplying electrical energy to the drive motors 12 , 32 and other electrical components of the handheld sawing machine 10 .

[0117] Alternatively or in addition to the supply via the electrical energy supply grid, an electrical energy store 67D, such as a battery, can also be provided, for example, for the energy supply of the sawing unit 10 and / or the pre-scribing unit 31 .

[0118] A connecting line 68 is provided for supplying power to the pre-scoring unit 31 via the sawing unit 11. The connecting line 68 is connected at its longitudinal ends by connecting sections 68A, 68B to the sawing unit 11 on the one hand and to the pre-scoring unit 31 on the other hand. An arc-shaped connecting section 68C or arc section extends between the connecting sections 68A, 68B.

[0119] However, it is also possible that the pre-scribing unit 31 can be supplied with electrical energy by means of an electrical energy store 68D which is arranged on or in the pre-scribing unit housing 33 , for example.

[0120] The connecting section 68C extends from the longitudinal ends 68A, 68B in an arcuate manner in the direction of the protective housing 29 , so that an intermediate space is present between the longitudinal ends 68A, 68B, which is optimally suitable for handling components of the pre-scribing unit 31 .

[0121] In particular, the pre-scored portion handle body 37 is accessible via the intermediate space between the coupling sections 68A, 68B or the interior space of the connecting section 68C, by means of which the operator can exert an actuating force in the region of the pre-scored unit 31 in the direction of the guide surface 19. The pre-scored portion handle body 37 has a grip surface 37A, which is particularly arranged on the cover wall 38 of the pre-scored unit housing 33. The pre-scored unit housing 33 forms the pre-scored portion handle body 37.

[0122] A gripping recess 37B and a flat surface 37C are provided on the handle surface 37A. A gripping protrusion 37D extends above the gripping recess 37B and has, for example, an outer peripheral contour adapted to fit the inner side of the operator's hand.

[0123] The housing 33 furthermore has side walls 38A, which extend alongside the longitudinal sides 18B of the guide body 18 , and a front wall 38B, which runs parallel to the front end side 18 of the guide body 18 .

[0124] Because the housing 33 of the pre-scribing unit 31 is fixedly mounted on the carrier 40, it does not pivot about the depth adjustment axis TV but is fixed in position relative to the depth adjustment axis TV. This allows the operator to support the hand-held sawing machine 10 in the working direction AR by supporting himself on the housing 33, in particular on its cover wall 38, and exerting a force on the hand-held sawing machine 10 in the direction toward the guide surface 19 and / or in the working direction AR. For support on the upper side 19A of the guide body 18, the housing 33 has a support portion 38D.

[0125] The housing 33 is advantageously designed to be ergonomically suitable. For example, the cover wall 38 is tilted at a slight angle to the rear with respect to the working direction AR, allowing the operator to apply operating forces in the working direction AR forward onto the housing 38 and, therefore, onto the handheld sawing machine 10. Advantageously, the cover wall 38 or the housing 33 has a gripping projection 38C. The gripping projection 38C is also suitable for accommodating the pre-scribing section drive motor 32 underneath. The operator can rest on the gripping projection 38C or, for example, grasp it with the inside of his or her hand. This results in a particularly ergonomic operating concept.

[0126] That is, the schematically illustrated operator BE can, for example, grasp the handle 26 with one hand to guide the hand-held sawing machine 10 in order to also operate the main switching member 60 and the operating element 61A with this hand, and with his other hand can optionally either grasp the handle 27 (this is represented by the hand position H1 in FIG. Figure 28 ), or supported on a pre-scored handle body 37 or housing 38 (this is drawn as hand position H2).

[0127] An alternative operating concept or an operating concept provided in addition to the handle 37 provides an additional pre-scoring handle body 337. The handle body 337 is, for example, rod-shaped and has a grip surface 337A for gripping by the operator BE. The handle body 337 is fixed to the protective housing 29 by means of a carrier 337B and extends from the protective housing in the direction of the pre-scoring unit 31.

[0128] The pre-scoring unit 31 is arranged between the handle body 337 and the guide body 18, wherein there is an intermediate space Z between the handle body 337 and the upper side of the housing 33 of the pre-scoring unit 31 facing away from the guide body 18, through which the operator can grasp the handle body 337.

[0129] The two 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 a right angle thereto. The two handle bodies 337 and 37 preferably extend as far as the longitudinal side 18B of the guide body 18, which is, so to speak, free of tools. Preferably, the two handle bodies 37 and 337 extend substantially over the entire transverse width of the guide body 18 from the longitudinal side or narrow side 18B in the direction of the longitudinal side 18A, where the tools 15, 35 are arranged, so that they provide an ergonomic support for the operator when guiding the hand-held sawing machine 10.

[0130] Furthermore, the sawing unit 11 or the sawing tool holder 14 can be locked in the upper depth adjustment position OT by means of a locking mechanism 61. An actuating element 61A of the locking mechanism 61, designed, for example, as a pressure-actuated element, is arranged in the upper region of the handle 26 or in the region furthest from the guide mechanism 17. By actuating the actuating element 61A, it can be disengaged from a support contour 61B, for example, a rear gripping contour, thereby unlocking the sawing unit 11 for adjustment from the upper depth adjustment position OT to one of the lower depth adjustment positions UT or to the scoring depth adjustment position RT.

[0131] The scoring depth adjustment position RT and the further lower depth adjustment position UT can also be adjusted by means of a sawing depth adjustment mechanism 62 of the handheld sawing machine 10. The sawing depth adjustment mechanism 62 comprises a depth stop guide 63 which extends arcuately around the sawing depth adjustment support 16.

[0132] Advantageously, in addition to the depth stop guide 63 , a guide link 74 is arranged which also extends arcuately about the depth setting axis TS at least in the region of the pre-scoring activation section 76 .

[0133] The depth stop 64 is supported on the depth stop guide 63 so that it can be adjusted, for example, displaced, in different depth adjustment positions. The depth stop guide 63 may include, for example, a guide groove, a guide slot, or the like. The depth stop 64 can be fixed in position relative to the depth stop guide 63 by means of a fastening element 65, such as a latching fastening element, a clamping element, or the like.

[0134] A stop body 66 is arranged on the sawing unit 11 which is movable about the depth adjustment axis TS, which stop body 66 projects in the direction of the depth adjustment stop 64 and abuts against the depth adjustment stop in the depth adjustment position respectively set by the stop body.

[0135] The pre-score unit 31, in particular its pre-score portion carrier 80, is pivotably supported about a depth adjustment axis TV on a carrier 40 that is pivotable about a bevel axis G by means of a pre-score portion depth adjustment support 36. The pre-score portion depth adjustment support 36 includes a support base 86 fixed to the carrier 40. The support base 86 includes a support plate 86A, such as a flange or flange body, from which a shaft link 86B extends. The support plate 86A is secured to the base wall 29A of the protective housing 29 by means of threaded fasteners 86C, such that the shaft link 86B extends from the base wall 29A.

[0136] A bearing sleeve 86E is arranged on the outer circumference of the shaft member 86B, and a bearing member 86F is arranged on its outer circumference. The bearing sleeve 86E engages in a bearing receptacle of the bearing member 86F, so that the bearing member 86F is supported pivotably about the depth adjustment axis TV by means of the bearing sleeve 86E. The bearing member 86F is, for example, fixedly connected to the pre-scoring portion carrier 80 and is, for example, accommodated in its receptacle.

[0137] The support sleeve 86E represents an option that improves the rotatability or pivotability about the depth adjustment axis TV. Furthermore, the support sleeve 86E improves the longitudinal displaceability of the pre-scribing part carrier 80, and thus the pre-scribing unit 31, about the transverse adjustment axis QS, in order to adjust the pre-scribing part tool holder 34 relative to the sawing tool holder 14, and thus the pre-scribing tool 35 relative to the sawing tool 15, along mutually aligned axes, so that the score produced by the pre-scribing tool 35 is aligned with the saw cut produced by the sawing tool 15. Advantageously, the transverse adjustment axis QS simultaneously corresponds to the depth adjustment axis TV.

[0138] The transverse adjustment mechanism 87 is used to adjust the pre-scored tool receptacle 34 about the transverse adjustment axis QS. The transverse adjustment mechanism 87 comprises, for example, an adjustment threaded fastener as an adjustment member 87A, the head of which forms an actuating element 87B. The actuating element 87B may be provided radially on the outside with, for example, grooves or other similar handles that facilitate actuation by the operator BE. A threaded section 87C engages and is screwed into an adjustment receptacle 86D of the shaft member 86B. Thus, the position of the actuating element 87B along the transverse adjustment axis QS can be adjusted by rotating the adjustment threaded fastener or the adjustment member 87A. In other words, the threaded section 87C can be screwed into or out of the adjustment receptacle 86D.

[0139] The actuating element 87B projects radially in front of the transverse adjustment axis QS with a projection, for example a flange projection, in front of the shaft member 86B, so that the bearing sleeve 86E and / or the bearing member 86F can be supported on this projection. Thus, when the threaded section 87C is screwed into the adjustment receptacle 86D, the actuating element 87B drives the bearing member 86F along the transverse adjustment axis QS in the direction of the carrier plate 86A of the support base 86 and thereby adjusts the pre-scored tool receptacle 34 in the direction away from the longitudinal tool side 18A of the guide body 18.

[0140] Spring 86H acts relative to the adjustment direction. It is supported on the one hand on the carrier plate 86A and on the other hand on the bearing member 86F, thereby acting with a force in the direction toward the actuating element 87B. Spring 86H engages in a spring receptacle 86G of the bearing member 86F, which is designed, for example, as a peripheral groove extending about the transverse adjustment axis QS. Spring 86H passes through the bearing member 86F, the bearing sleeve 86E, and the shaft member 86B.

[0141] By rotating the operating element 87B about the transverse adjustment axis QS, the position of the pre-scoring tool holder 34 and thereby the pre-scoring tool 35 relative to the longitudinal axis L of the guide body 18 and / or the cutting axis that can be produced by the sawing tool 15 can be adjusted in directions relative to each other about the transverse adjustment axis QS, for example from a center position by a maximum of 2.5 to 4 mm.

[0142] The latching mechanism 88 is used to secure, in particular, rotationally secure, the operating element 87B or the adjustment member 87A. The latching mechanism 88 comprises a clip-like spring 88A or, alternatively, 188A, with a latching member 88B formed at its free end. The latching springs 88B, 188B latch into latching receptacles 88C, which are arranged on the radial outer periphery of the operating element 87B relative to the transverse adjustment axis QS. By rotating the operating element 87B, the latching member 88B exits one latching receptacle 88C and latches into the next, adjacent latching receptacle 88C in the circumferential direction. The latching mechanism 88 thus secures the transverse adjustment mechanism 87 relative to the correspondingly adjusted transverse position of the pre-scoring tool receptacle 34.

[0143] The control receiver 72 is arranged on the control receiver arm 90, namely at its free end region. A pivot bearing 90A is provided for a wheel 90B, which is rotatable about a rotation axis D90 by means of the pivot bearing 90A at the free end region of the control receiver arm 90 and presents a guide track follower 75. This means that the wheel 90 can roll on the guide track 74.

[0144] The control receiver arm 90 is supported with a support section 91 so as to be pivotable about a pivot axis, which in this case corresponds to the depth adjustment axis TV, relative to the pre-score carrier 80 of the pre-score unit 31 , so that the guide follower 75 assumes different angular positions relative to the depth adjustment axis TV or relative to the pre-score carrier 80 , depending on the pivot position of the control receiver arm 90 . Therefore, by pivoting the control receiver arm 90 relative to the pre-score carrier 80 , different penetration depths or different distances of the pre-score tool 35 into the workpiece W can be set in the active position AP, at which the pre-score tool 35 protrudes beyond the guide surface 19 . Therefore, the control receiver arm 90 forms a component of the pre-score depth adjustment means 95 .

[0145] The actuating arm 92 projects from the support section 91 at an angle to the actuating receiver arm 90. An actuating surface 92A is provided on the actuating arm 92, on which an adjusting body 93 acts. By adjusting the relative position of the adjusting body 93 with respect to the actuating surface 92A, the actuating receiver arm 90, and thus the slot follower 75, can be adjusted so that they have different actuating distances BA from the pre-score tool receptacle 34. The slot follower 75, and thus the actuating receiver 72 and the pre-score tool receptacle 34, thus project from the support section 81 of the pre-score carrier 80 in the manner of an arm to opposite sides.

[0146] The adjusting body 93 supports the actuating arm 92 against the force of a spring assembly 94. The spring assembly 94 comprises a coil spring 94A, which is fastened on the one hand to the pre-scoring portion carrier 80 and on the other hand to the actuating receiver arm 90 and which acts in the direction of the carrier 90 or the pre-scoring portion tool receptacle 34. In contrast, the adjusting body 93 acts in the opposite direction, that is, in the sense of adjusting the actuating receiver arm 90 of the pre-scoring portion carrier 80 and thereby increasing the actuating distance between the actuating receiver 72 and the pre-scoring portion tool receptacle 34.

[0147] The adjusting body 93 is mounted displaceably along the axis SA relative to the pre-scoring carrier 80 . Furthermore, the adjusting body 93 is mounted displaceably along the axis SB transversely (in this case at right angles) to the axis SA, wherein this freedom of movement is associated with the pre-scoring depth adjustment means 95 .

[0148] The adjusting body 93 has a longitudinal end 93A, at which an adjusting surface 93B is arranged for engagement with the actuating surface 92A of the actuating arm 92. Between the longitudinal end 93A and the actuating end 93B extends a middle section 93C of the adjusting body 93, at which it has an adjusting contour 93D.

[0149] The adjusting body 93 is supported displaceably about an adjustment axis SA on a support body 96, which is designed, for example, as a housing. For example, the support body 96 has support receptacles 96A, 96C, which are arranged on walls or support sections 96B, 96D of the support body 96. A central section 93C of the adjusting body 93 extends between the support receptacles 96A, 96C, with the adjusting body 93 projecting in front of the support body 96 on opposite sides, namely, on one hand, with an adjustment surface 93B and, on the other hand, with an actuating end or actuating element 93E, which engages with the actuating surface 92A of the actuating arm 92 and on which a gripping surface or similar other adjustment surface is arranged for actuation by an operator.

[0150] That is, the operator can, for example, pull on the actuating element 93E in the direction of the adjustment axis SA, whereby the adjusting body 93 is disengaged from the actuating surface 92A, so that the spring assembly 94 can actuate the actuating receiver arm 90 from the activation position AK away from the guide slot 74 into the deactivation position DK. In the deactivation position DK, the slot follower 75 is disengaged from the guide slot 74 and has, for example, a spacing F ( Figure 7 ), thereby eliminating the driving coupling of the drive mechanism 70 between the sawing unit 11 and the pre-scribing unit 31. As a result, the sawing unit 11 can be adjusted between its depth adjustment positions OT and UT, while the pre-scribing unit 11 is not adjusted about the depth adjustment axis TV. The pre-scribing tool 35 remains adjusted back behind the guide surface 19, i.e., it is inactive.

[0151] That is to say, the adjusting body 93 forms a component of the deactivation mechanism 97 for activating or deactivating the entrainment mechanism 70 .

[0152] The adjusting body 93 is biased into its activated position AK by a spring 96E. The spring 96E is supported, for example, on the adjusting body 93, for example at a step close to the middle section 93C and on a wall 96D of the support body 96.

[0153] A rotation prevention 93F (for example a flat surface) which is fixed in position relative to the pre-scored portion carrier 80 is preferably provided on the actuating end or actuating element 93E, on which the actuating end 93F is supported so as to be non-rotatable relative to the adjustment axis SA.

[0154] The adjustment contour 93D forms an integral part of the pre-scored depth adjustment means 95. The adjustment contour 93D, arranged on the radially outer periphery of the center section 93C of the adjustment body 93, engages with an adjustment receptacle 98, whose position along the adjustment axis SB and thus transversely to the adjustment axis SA can be adjusted by means of a depth adjustment member 99, such as an adjustment screw. An operator can actuate the depth adjustment member 99 by means of an actuating element 99A.

[0155] Alternatively, it would be possible for the adjustment body 93 to be supported so as to be able to swing about the adjustment axis SA and for the adjustment contour 93D to present an eccentric contour, so that by twisting the adjustment body 93 about the adjustment axis SA, parts of the adjustment contour 93D that protrude radially to different distances before the adjustment axis SA are supported on the adjustment receptacle 98 and thus the adjustment surface 93B of the adjustment body 93 occupies different positions relative to the adjustment axis SB.

[0156] The depth adjustment member 99 comprises, for example, an operating element 99A, for example a head, from which a threaded section 99B extends, which is rotatably supported on a component fixed in position relative to the pre-scored portion carrier 80, for example a support body 96, and is screwed into a body 98A providing an adjustment receptacle 98.

[0157] By screwing the operating depth adjustment link 99, the lateral position of the U-shaped adjustment receptacle 98 can be adjusted transversely to the adjustment axis SA, for example, along the adjustment axis SB, thereby simultaneously adjusting the position of the adjustment surface 93B and thus the position of the operating surface 92A of the operating arm 92 resting thereon transversely to the adjustment axis SA.

[0158] The adjusting body 93 is displaceably received in the adjustment receptacle 98 along the adjustment axis SA, so that even when the deactivation mechanism 97 is actuated by displacing the adjusting body 93 along the adjustment axis SA, the pre-scoring depth adjustment device 95 maintains the respectively adjusted depth adjustment position.

[0159] Between the pre-scoring unit housing 33 forming the pre-scoring handle body 37 and the sawing unit housing 13, there is an intermediate space 33B relative to the longitudinal axis L of the guide mechanism 17 or the guide body 18, in which the operator can easily access one or more of the operating elements of the pre-scoring unit 31 that are configured for operator operation, such as the operating element 93E of the deactivation mechanism 97, the operating element 87B of the lateral adjustment mechanism 97 or the operating element 99A of the pre-scoring depth adjustment device 95.

[0160] The hand-held sawing machine 10 is short with respect to the longitudinal axis L of its guide body 18 (that is, between the end faces 18C, 18D). This is achieved in particular by the compact pre-scoring module 30 or pre-scoring unit 31. Furthermore, it is advantageous that the depth adjustment axis TV is arranged between the tool holders 14 and 34. This means that the hand-held sawing machine 10 is not top-heavy in its front region in the working direction AR, but is instead very short.

[0161] The arrangement of the tool holders 14, 34, and thus the sawing tool 15 and the pre-scribing tool 35, close to or directly on the longitudinal side 18A of the guide body 18, further contributes to the user-friendliness of the handheld sawing machine 10. As a result, the two tools 15, 35 are particularly well visible in the area of their insertion into the workpiece W. Furthermore, the bevel axis G runs directly alongside the longitudinal side 18A, so that the tools 14, 35 can be optimally pivoted about the longitudinal side 18A, but also about the longitudinal narrow sides 204 of the guide rails 200, 200A.

[0162] Furthermore, in the case of the handheld sawing machine 10 , an advantageous suction concept takes care of dust, particles and the like which are generated when sawing and pre-scribing the workpiece W: The sawing tool receptacle 48 and the pre-scribing tool receptacle 49 are provided with sawing dust removal devices 48A and pre-scribing dust removal devices 49A. The receptacles 48 and 49 extend to the guide surface 19, where the sawing tool 15 is in one of the lower depth adjustment positions UT, and the pre-scribing tool 35, in its active position AP, protrudes from the respective receptacle 48 and 49 in front of the guide surface 19. The dust removal devices 48A and 49A are fluidically connected to a dust removal connection 52, which is arranged at the rear of the handheld sawing machine 10 in the working direction AR, in particular at the rear upper portion of the protective housing 29. A suction hose SL of a suction device SV (e.g., a shop vacuum cleaner) can be connected to the dust removal connection 52 (designed, for example, as a connecting pipe) to remove dust, particles, or the like generated during sawing operation of the handheld sawing machine 10.

[0163] The protective housing 29 has a protective housing part 40A that is fixed in position relative to the carrier 40 and is covered by a protective housing cover 41 that can be removed from the protective housing part 40A for maintenance purposes. Accommodation spaces 48, 49 are formed between the protective housing part 40A and the protective housing cover 41 for the upper portion of the tool 15, 35 relative to the guide mechanism 17. The protective housing part 40A has, for example, a base wall 29A that lies opposite a cover wall 42 of the protective housing cover 41.

[0164] Between the base wall 29A and the cover wall 42 there is a recess 42A, through which the tool 15, 35 can be moved out of the protective housing 29 so that it protrudes in front of the guide surface 19. Next to the recess 42A, an obliquely inclined wall section 42B of the cover wall 42 is inclined in such a way that the lateral distance between the cover wall 42 and the base wall 29A is reduced in the region of the recess 42A and / or is smaller than in a region of the sawing tool receiving space 48 that is further away from the guide surface 19 and in which the sawing tool receptacle 14 is arranged.

[0165] Side walls 43C, 43 and 44C, 44 extend at an angle from the base wall 29A and the cover wall 42. These side walls abut against each other at the ends and engage with each other, so that the side walls 43-44 delimit the receiving spaces 48, 49. The side walls 43C, 43 are, for example, the rear side walls in the working direction AR. The side walls 44C, 44 extend along the upper section of the protective housing 29 or the section furthest away from the guide means 17 and along the front section of the protective housing 29 in the working direction AR.

[0166] The protective housing 29 has a projection 45 in which a pre-scribing tool receiving space 49 is provided. The cover wall 42 extends up to the projection 45. Here, a side wall 46 projects from the cover wall 42 on the side facing away from the guide means 17, and a side wall 47 projects at an angle in the working direction to the front (i.e., oriented toward the end side 18C). The side wall 47 rests on the protective housing part 40A, which is fixed in position relative to the carrier 40, so that overall the projection 45 provides a closed pre-scribing receiving space 49 in addition to the through-opening for the pre-scribing tool 35 facing the guide surface 19.

[0167] In principle, it is now possible to vacuum away the two receiving spaces 48, 49 via the dust removal connection 52 without further flow control measures. However, it remains unnoticed that the pre-scribing tool 35, when cutting into the workpiece top side WO, throws particles toward the sawing tool 15, which significantly impairs the view of the sawing tool 15 at the front cutting edge in the working direction AR. To remedy this problem, several measures, described below, are advantageous.

[0168] To remove dust, particles, or the like, a dust removal duct 50 extends in the area of the protective housing 29 facing away from the guide mechanism 17. The dust removal duct 50 is delimited on the cover 41 or the protective housing part 40A by the side walls 44, 44C on the one hand and by the intermediate walls 51, 51C opposite thereto on the other hand. The dust removal duct 50 extends from the area of the sawing tool 15 at the front in the working direction AR to a dust removal coupling 52 arranged at the rear in the working direction AR.

[0169] In principle, it is now possible for the pre-scribing tool receiving space 49 to communicate directly with the dust removal duct 50. However, advantageously, the pre-scribing tool receiving space 49 is separated from the sawing tool receiving space 48 by a separation in the form of a separating wall 55, at least in the region where the sawing tool 15 and the pre-scribing tool 35 are directly opposite each other, i.e., close to the guide surface 19. The separating wall 55 advantageously includes a separating wall portion 55C that is fixed in position relative to the protective housing 29, for example, the protective housing portion 40A. The separating wall 55, in particular the separating wall portion 55C, extends as far as the guide surface 19 and is thus located between the sawing tool 15 and the pre-scribing tool 35.

[0170] On the side facing the pre-scoring tool 35, the separating wall portion 55C or the separating wall 55 advantageously has a flow guide surface 55E, for example an inlet bevel or an impact surface 55D, onto which the particles generated by the pre-scoring tool 35 impact and are redirected in the direction of the dust removal channel 50, so that there is no further flow towards the sawing tool 15.

[0171] At the region of the separating wall section 55C remote from the guide surface 19, the pre-scoring tool receiving space 49 opens into the dust removal channel 50 at the outflow opening 52C, so that the particles generated by the pre-scoring tool 35 (which are Figure 18 The particle flow PV (illustrated in FIG. 1 ) is mixed with the particle flow PS (illustrated in FIG. 2 ) shown in FIG. 3 , which contains particles generated by the sawing tool 15 .

[0172] In this case, an alternative concept in which the aforementioned separating wall 55 is provided between the pre-scribing tool 35 and the sawing tool 15 is also advantageous. Figure 21 . However, the receiving spaces 48 and 49 are completely separated from one another, and the pre-scribing tool receiving space 49 has a dust removal connection 52B, separate from the dust removal connection 52, for removing particles from the pre-scribing unit 31, to which a further suction hose SL2 can be connected. For example, a connecting pipe is provided at the dust removal connection 52B for connecting the suction hose SL2, which is also fluidically connected to a suction device SV, for example, in order to generate a particle flow PV for transporting particles from the pre-scribing unit 31. The particles generated by the sawing tool 15 flow to the suction device SV via the dust removal connection 52 as a particle flow PS, separate from the particle flow PV.

[0173] A positive-fit contour 52A, such as a rotational positive-fit contour, a plug-in positive-fit contour, etc., is preferably present on the dust removal coupling 52, 52B for positively locking the suction hose SL, SL2. Furthermore, it is advantageous if the dust removal coupling 52, 52B has a rotary bearing 52D so that the suction hose SL, SL2 can be rotatably mounted on the handheld sawing machine 10.

[0174] Optimal visibility of the tools is already provided by the arrangement of the tool receptacles 14, 34 and thus the tools 15, 35 directly on the free longitudinal side 18A of the guide body 17. Furthermore, a viewing window 54 on the cover wall 42, in particular in its lower edge region, close to the guide surface 19 is advantageous.

[0175] The viewing window 54 is arranged in the region of the cover wall 42 , in which the pre-scribing tool 35 is situated opposite the sawing tool 15 . As a result, both tools can be seen through the viewing window 54 .

[0176] The viewing window 54 can be closed by a fixed, transparent wall, for example made of plastic, so that the receiving spaces 48 , 49 are closed by said wall. However, a covering element 53 , in particular a window or window covering element, is currently provided.

[0177] The covering element 53 has a sawing tool section 53A and a pre-scoring tool section 53B, which are assigned to the sawing tool 15 or the pre-scoring tool 35 and are respectively opposite the sawing tool 15 or the pre-scoring tool 35 when the covering element 53 is adjusted into the covering position ABS, in which the covering element covers the viewing window 54.

[0178] The cover element 53 can be adjusted by means of a bearing 53D, in particular a sliding bearing, on the cover wall 42 between a covering position ABS and an open position OS, in which the cover element at least partially exposes the viewing window 54, in particular the section thereof facing the guide surface 19. For gripping the cover element 53, an actuating contour 53C, such as a rib or the like, is advantageously provided. The cover element 53 can be adjusted into its open position OS by sliding actuation in the direction P1 and into its covering position ABS by sliding actuation in the opposite direction P2.

[0179] The covering element 53 has a partition wall section 56 of the partition wall 55. In the covering position ABS and in the open position OS, the partition wall section 56 is in telescopic engagement or contact with the stationary partition wall section 55A, so 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, mutually opposing side walls 56A. The stationary partition wall section 55A can engage in the partition wall receptacle 57, wherein the partition wall section engages deeper in the partition wall receptacle 57 in the open position OS than in the covering position ABS.

[0180] Furthermore, recesses 58, 59 are provided on the cover wall 42, through which the tool holders 14, 34 are accessible for tool changes of the tools 15, 35. It should be mentioned in this connection that the retaining elements 14A, 34A advantageously have an equivalent actuating contour for a tool, for example a slot for a screwdriver, with which the retaining elements 14A, 34A can be released and fixed to the tool holders 14, 34 for tool changes.

[0181] A blocking mechanism 85 is provided for tool replacement of the pre-scoring tool 35. The blocking mechanism 85 comprises a pre-scoring blocking member 85A, which in the blocking position engages in a blocking receptacle 85B, which is non-rotatably connected to the pre-scoring tool receptacle 34 and is, for example, arranged at the driven shaft of the transmission mechanism 84. The blocking member 85A is axially displaceable along the adjustment axis S85 at the guide 85C. By applying pressure to the operating contour 85D at the end region of the blocking member 85A that freely protrudes before the guide 85C, the operator can bring the blocking member 85A into engagement with the blocking receptacle 85B, that is, into a blocking position in which the pre-scoring tool receptacle 34 is non-rotatably blocked. The blocking position can be eliminated, for example, by pulling the blocking member 85A in the direction away from the blocking receptacle 85B. Advantageously, a spring 85E, which is schematically shown in the drawing, is provided and which biases the blocking member 85A into a released position, in which the blocking member 85A does not engage in the blocking receptacle 85B.

[0182] Alternatively or in addition, a motor drive 85F, such as an electromagnet, an electric linear drive, etc., can be provided, by means of which the blocking member 85A can be adjusted to 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 electric switching element 85G is provided, for example, which can be actuated by an operator by squeezing or the like.

[0183] The fixing mechanism 100 serves for a safe and convenient tool change of the sawing tool 15 and / or the pre-scribing tool 35 .

[0184] When the fixing mechanism is adjusted to its fixing position SG, the fixing mechanism 100 blocks the switching element 60A to prevent switching on the drive motors 12, 32, and when it is adjusted to the sawing operating position FS, it releases the switching element 60A to switch on the drive motors 12, 32. Thus, both drive motors 12, 32 can be simultaneously blocked from switching on by the fixing mechanism 100 for tool change.

[0185] The fixing mechanism 100 comprises an operating 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 operating element 101 is pivoted away from the protective housing 29 or the handle 26, that is, when it is positioned in the position indicated by the arrows 24, the fixing mechanism 100 is located. Figure 31 and 32When the fixed position SG is shown in FIG, the fixed position SG is immediately recognizable to the operator. The operating element 101 comprises a gripping portion 102 with side legs, between which a portion of the protective housing 29 is accommodated in the sawing operating position FS. Thus, the operating element 101 rests, so to speak, against the protective housing 29 in the sawing operating position FS and does not in any way protrude beyond it. The operating element 101 can be manually grasped by the operator at the gripping portion 102.

[0186] Also possible is a motor drive 101A for the operating element 101, for example a schematically shown electric motor, which can pivotally or rotationally drive the operating element 101 and can be switched according to a schematically shown electrical switching element 101B that can be operated by an operator, for example by squeezing.

[0187] The grip portion 101 is arranged at the free end region of an actuating arm 103 of the actuating element 101 , which is supported on the protective housing 29 with a bearing portion 104 so as to be pivotable about a pivot axis DB.

[0188] The operating element 101 operates the switching element locking member 105 for locking the switching element 60A. The locking member 105 has an arm 106 that can be operated by the operating element 101, for example, displaceably and / or pivotably, and at its free end region is arranged a rear gripping contour 107, for example a hook, which, in the locked position of the switching element locking member 105, reaches rear gripping with the operating element 60 of the switching element 60A so that it can no longer actuate the switching element 60A in the direction of its switched-on position.

[0189] Furthermore, the actuating element 101 is advantageously designed for disengaging the locking mechanism 61. For this purpose, for example, an actuating unit 108, such as a cam or the like, is kinematically coupled to the actuating element 101, for example, in the sense of a rotation about an axis DB, which acts on the adjustment unit 109 so that when the actuating element 101 is adjusted into the fixed position SG, its actuating element 61A is disengaged from the support contour 61B. As a result, the sawing unit 11 can be pivoted about the depth adjustment axis TS from the upper depth adjustment position OT into a tool change depth adjustment position WT suitable for changing the sawing tool 15.

[0190] A latching mechanism 120 is provided for latching in the tool change depth adjustment position WT. The latching mechanism 120 has a latching element 121 that is pivotally mounted about a pivot axis S12. The latching element 121 includes a latching projection 122 for latching with a latching receptacle 123, which is arranged in a fixed position on the protective housing 29, for example, next to the depth stop guide 63. A spring 124 urges the latching element 121 toward the latching position, in which it can latch with the latching receptacle 123.

[0191] The latching mechanism 120 can be activated and deactivated by the fixing mechanism 100. That is, when the actuating element 101 is adjusted into the fixing position SG, it activates the latching mechanism 120. The actuating element 101 is kinematically coupled to the actuating unit 110 for activating and deactivating the latching mechanism 120, for example, in the sense of a rotational movement. The operating unit 110 has an operating slot 111 on its side facing the latching member 121, which acts on an operating leg 125 of the latching member 121 and acts more precisely in the following sense: when the operating element 101 is adjusted to the fixed position SG, the latching member 121 is released by the spring 124 for latching with the latching receptacle 123 and / or the spring 124 is prestressed, while when the operating element 101 is adjusted to the sawing operating position FS, the latching member 121 remains continuously disengaged from the latching receptacle 123 relative to the action of the spring 124 and / or the spring 124 does not have a spring tension sufficient to latch the latching member 121.

[0192] When the sawing tool holder 14 is adjusted to the tool change depth setting position WT, it is arranged in the area of the recess 58. The pre-scribing tool holder 34 is also adjusted to the tool change depth setting position by the entrainment mechanism 70, in which it is arranged in the recess 59. The tool holders 14, 34 are thus accessible for tool changes of the tools 15, 35.

[0193] Furthermore, the actuating element 101 interacts with or acts on a blocking mechanism 130 , by means of which the sawing tool receptacle 14 can be blocked against rotation about the tool axis of rotation DS.

[0194] The blocking mechanism 130 has a saw blocking member 131, which, in the blocking position, engages with at least one blocking contour 132, which is non-rotatably connected to the saw tool receptacle 14. For example, a plurality of blocking contours 132 are arranged in the form of blocking receptacles 133 on a fan wheel 134, which is rotationally coupled to the saw drive motor 12 and / or the saw tool receptacle 14. The fan wheel 134 has, for example, fan blades 135. The blocking receptacles 133 are arranged on the radial outer circumference of the fan wheel 134.

[0195] The motor drive 101A of the fixing mechanism 100 simultaneously forms a drive for adjusting the saw blocking member 131 between its blocking position, in which it blocks the sawing tool receptacle 14 , and its release position, in which it releases the sawing tool receptacle.

[0196] The saw blocking member 131 has a blocking projection 136 at one longitudinal end, which can engage with one of the blocking recesses 133 when the blocking recess is opposite it due to a corresponding rotational position of the fan wheel. The other longitudinal end of the saw blocking member 131 is movably, in particular slidably, accommodated in a bearing (not visible in the drawings) and is biased toward its blocking position by a spring 137. By adjusting the actuating element 101 to the fixed position SG, the saw blocking member 131 is released for actuation by the spring 137, or the spring 137 is preloaded by the actuating element 101 for actuating the saw blocking member 131, thereby prestressing the blocking projection 136 for locking with one of the blocking recesses 133. If the sawing tool receptacle 14 is then slightly twisted, one of the blocking recesses 133 moves into a forward position relative to the blocking projection 136, causing it to engage in the blocking recess 133 and secure the sawing tool receptacle 14 against further twisting.

[0197] By adjusting the fixing mechanism 100 to the fixed position SG, the pre-score drive motor 32 is electrically blocked and thus prevented from being switched on. Thus, the operator can safely block the pre-score tool receptacle 34 and replace the pre-score tool 35 by manually actuating the blocking mechanism 85.

[0198] Instead of or in addition to the manual operation, a mechanical driving coupling not shown in the accompanying drawings can be provided between the pre-scoring portion blocking link 85A and the sawing blocking link 131, so that when the sawing blocking link 131 is adjusted to the blocking position, the pre-scoring portion locking link 85A is also adjusted to the blocking position at the same time.

[0199] If a mechanical connection between the blocking elements 85A and 131 is not possible or difficult to achieve, for example because the transmission mechanism that establishes the coupling between the blocking elements 85A and 131 is mechanically complex or requires a large amount of space, an electrical coupling is also possible. For example, a sensor 101C is provided for detecting the position of the fixing mechanism 100, for example, the position of the operating element 101. The sensor 101C detects, for example, whether the fixing mechanism 100 is in the fixing position SG or the sawing operating position FS. In the sawing operating position FS, the sensor 101C controls, for example.

[0200] Drive mechanism 70 Figure 33 . As is known, the operator can manipulate the pre-score unit 31 from the inactive position toward the active position by swiveling the saw unit 11, wherein force is transmitted via the drive mechanism 70. Schematically illustrated is a pre-score drive 32B of the pre-score unit 31, wherein, for example, a belt 32C or another similar force-transmitting element is kinematically coupled to the saw drive motor 32 and driven thereby to drive the pre-score tool receptacle 34. For tensioning the belt, for example, a tensioning roller, in particular a spring-loaded tensioning roller, and / or a length compensating mechanism or the like can be provided, which are not shown in the figures.

[0201] Based on the handheld sawing machine 10C Figure 34 In the embodiment of the present invention, a drive mechanism 70C is provided, by means of which the pre-scoring unit 31C is driven when the saw unit 11 is actuated from the upper depth adjustment position shown in the figures in the direction of the lower depth adjustment position, in which the sawing tool 15 projects in front of the guide surface 19. However, the pre-scoring unit 31C is biased in the direction of its active position, in which the pre-scoring tool 35 projects in front of the guide surface 19, by the spring assembly 39C, as in the case of the hand-held sawing machine 10, and not in the direction of its inactive position.

[0202] A driving surface or stop surface is provided on the sawing unit 11 as an actuation trigger 71C, on which an actuation receiver 72C of the pre-scoring unit 31C is supported. The actuation receiver 72C is arranged, for example, on an actuation arm that extends from the pre-scoring unit 31C, extending from the pre-scoring depth adjustment support 36. When the sawing unit 11 is adjusted toward the depth adjustment position below the sawing tool receptacle 34, the actuation trigger 71C releases the actuation receiver 72C, so to speak. In other words, the spring assembly 39C can adjust the pre-scoring unit 31C from the inactive position toward the active position.

[0203] In the active position, the pre-scribing unit 31C advantageously stops with a stop projection 95C at a pre-scribing depth stop 95D of the guide mechanism 17. The depth stop 95D can be adjustable for setting different depth adjustment positions or active positions, for example if it is formed by the head of a screw that can be screwed into the guide mechanism 17. The stop projection 95C is provided, for example, at the free end region of an arm of the pre-scribing unit 31C that protrudes from the depth adjustment support 36.

[0204] In the embodiment of the handheld sawing machine 10D, no drive mechanism is provided between its sawing unit 11 and its pre-scoring unit 31D. The pre-scoring unit 31D is supported on the guide mechanism 17 by means of the illustrated depth adjustment bearing 36 so as to be freely pivotable about the depth adjustment axis TV and independently of the sawing unit 11, but must be manually operated by the operator. For this purpose, a pre-scoring handle 237D, for example, in the form of a knob, is provided, projecting upward from the pre-scoring unit 31D relative to the guide mechanism 17. Furthermore, a stop projection 95C is advantageously provided on the pre-scoring unit 31D for actuating against a depth stop 95D.

[0205] For example, a switching element 60D is arranged on the handle body 237D in order to switch on and / or off the drive motor 32 of the pre-scoring unit 31D. That is, the handle body 237D forms an operating transmitter 71D for the pre-scoring unit 31D.

[0206] For example, it is also possible to use a rotary drive to adjust the pre-scribing tool 35 between an active position and an inactive position and / or to adjust its penetration depth into the workpiece. For example, the servo motor 72D can be arranged on the pre-scribing depth adjustment support 36, and the pre-scribing tool 35 can be adjusted between different depth adjustment positions about the depth adjustment axis TV by the rotary drive.

[0207] Undoubtedly, a motor-driven concept for adjusting the pre-scoring unit between its inactive and active positions is also advantageous, as becomes clear in the embodiment of a handheld sawing machine 10E. While the sawing unit 11 is manually pivoted by the operator between an upper depth adjustment position and a lower depth adjustment position via the depth adjustment support 16 in the manner described above, a servo motor 72E is provided for adjusting the pre-scoring unit 31E. A sensor serves as an actuation signal 71E for the drive mechanism 70E. The sensor detects the respective rotational position or relative position of the sawing unit 11 relative to the guide mechanism 17, i.e., the respective adjusted depth adjustment position. The sensor or actuation signal 71E is connected to the servo motor 72E (i.e., an actuation receiver) of the pre-scoring unit 31E via a control connection (e.g., a wireless or wired control connection, not shown in the figures) to actuate the servo motor. It is understood that the servo motor 72E can also be independently actuated, i.e., decoupled from the actuation signal or sensor 71E. For example, an electrical switching element 99E can be provided, by means of which an operator can individually control the servomotor 72E, for example, in order to introduce a notch into the workpiece without producing a saw cut or to adjust the pre-scribing unit 31E into the inactive position in order to produce only one saw cut with the saw tool 15. Furthermore, a deactivation mechanism 97E is advantageous, for example also an electrical switching element, by means of which the servomotor 72E can be actuated in the direction of the inactive position or the upper position of the pre-scribing tool receptacle 34E and / or by which the current supply of the servomotor 72E can be blocked in the direction of the active position of the pre-scribing tool receptacle 34E.

[0208] Naturally, a deactivation mechanism 97E and / or a switching element 99E can be provided for actuating the rotationally driven servomotor 72D.

[0209] Unlike the pre-scribing units described so far, the pre-scribing unit 31E is not pivotably mounted relative to the guide mechanism 17, but rather is displaceably mounted along the depth adjustment axis TVS by means of a sliding bearing 36E. A spring 39E loads, for example, the pre-scribing unit carrier 80E, on which the pre-scribing unit drive motor 32E is held, toward an inactive position in which the pre-scribing tool 35E, driven by the pre-scribing unit drive motor 32E, is adjusted back behind the guide surface 19. The servo motor 72E acts in the opposite direction to the spring 39E, i.e., in the active position, actuating the pre-scribing tool 35E so that it projects in front of the guide surface 19 and can engage the workpiece. However, the servo motor 72E can also be used to adjust the depth, i.e., the penetration depth of the pre-scribing tool 35E into the workpiece W.

[0210] The pre-score unit 31F of the handheld sawing machine 10F can also be adjusted linearly, i.e., along the depth adjustment axis TVS, by means of a depth adjustment bearing, in particular a sliding bearing 36F. The sliding bearing 36F comprises, for example, a guide rod or a support column, on which a pre-score carrier 80F is supported so as to be displaceable about the depth adjustment axis TVS. The pre-score carrier 80F is biased into its inactive position by a spring assembly 39F, in which the pre-score tool 35F does not protrude in front of the guide surface 19.

[0211] Although the pre-scribing tool 35F itself can include a saw blade or a pre-scribing blade, it is, however, a milling tool or a milling head like the pre-scribing tool 35E. The pre-scribing tool 35F is driven by a pre-scribing portion drive motor 32F.

[0212] The pre-scribing unit 31F can also be adjusted independently of the sawing unit 11 between its inactive position and one or more active positions.

[0213] However, unlike the handheld sawing machine 10E, the pre-scribing unit 31F cannot be adjusted between the active position and the inactive position by motor, but rather manually. A spring assembly 39F loads the pre-scribing part carrier 80F into the inactive position. In the direction toward the active position, a manual lever or other operating element is provided as an operating transmitter 71F, which is pivotably supported on the sawing unit 11. This lever manually operates a force transmission element 90F, such as a Bowden cable, a cable drive, a pneumatic or hydraulic circuit, or the like. This force transmission element acts on an operating receiver 72F, such as a fluid cylinder, a servo drive, or the like, to adjust the pre-scribing tool 35 in the direction toward the active position in response to the force of the spring assembly 39F. This movement is advantageously limited by a depth stop 95F, which is fixedly arranged on the guide mechanism 17.

[0214] The pre-scoring unit 31X corresponds essentially to the pre-scoring unit 31, but has an alternative depth adjustment device 195. While the depth adjustment device 95 causes the depth adjustment by means of the adjustment body 93 supporting the manipulator arm 92, the depth adjustment member 199 is arranged on the manipulator receiver arm 90, for example, on the manipulator arm projection 92B extending from the manipulator arm 92, and is supported on the adjustment body 193.

[0215] The depth adjustment member 199 has an operating element 199A, which is connected to or comprises a threaded section 199B. The threaded section 199B screws into a threaded receptacle 92C on the protrusion 92B of the operating arm. The threaded section 199B is arranged on a screw body 199C, which screws into the threaded receptacle 92C. The screw body 199C is connected to the operating element 199A on the one hand and accommodates a support body 199D, which can be, for example, pencil-shaped or elongated. The free end area of the support body 199D provides the operating surface 192A, by means of which the operating receiver arm 90 can be operated.

[0216] The two-part construction consisting of the support body 199D and the screw body 199C has the advantage that the support body 199D can be positioned relative to the screw body 199C and then fixed thereto, for example, by gluing, in order to fixedly align the first depth adjustment position or initial depth adjustment position to be assumed by the pre-scribing unit 31X. This allows, for example, to compensate for manufacturing tolerances. However, it is also possible for the depth adjustment member 199 to be one-piece or for parts thereof, for example, the support body 199D and the screw body 199C, to be constructed from one piece.

[0217] A spring 199E is preferably arranged between the actuating element 199A or the screw body 199C, which represents, so to speak, the head of the depth adjustment member 199, and the actuating arm projection 92B, on the other hand. The spring 199E is configured, for example, to provide a latching and / or frictional engagement in order to secure (e.g., clamp or frictionally hold) the depth adjustment member 199 in the correspondingly adjusted depth adjustment position. This makes it possible, for example, to prevent or reduce unintentional adjustment movements, in particular those triggered by vibrations or the like.

[0218] The pre-scored portion depth adjustment device 195 interacts with the deactivation mechanism 197 and the adjustment body 193. The adjustment body 193 projects laterally from the pre-scored portion carrier 80, similar to the adjustment body 93. However, unlike the adjustment body 93, the adjustment body 193 is pivotally mounted, i.e., pivotally mounted about a pivot axis or adjustment axis SB. The adjustment axis SB corresponds to the longitudinal axis or longitudinal extension of the adjustment body 193.

[0219] The longitudinal end or bearing end 193A of the adjusting body 193, which is designed, for example, in the manner of a bearing pin, is pivotably mounted in a bearing receptacle 196, which is arranged stationarily on the carrier 80, i.e., pivotably mounted about the adjustment axis SB. The bearing receptacle 196A is designed, for example, in the manner of a receiving sleeve or a receiving tube. The bearing receptacle 196A is, for example, provided on the supporting body 196 and projects from the pre-scored portion carrier 80 transversely, in particular at a right angle, to its longitudinal extension.

[0220] The middle section 193C of the adjusting body 193 has an adjusting contour 193D, on which the depth adjustment member 199 with its actuating surface 192A is supported. The adjusting contour 193D is located between the longitudinal end or support end 193A and an actuating element 193E, for example a handle, which projects from the adjusting body 93 transversely to the adjustment axis SB and can be easily grasped by the operator.

[0221] Adjustment contour 193D has adjustment sections 193G and 193H, which are formed by the eccentric peripheral form of adjustment contour 193D relative to the pivot axis or adjustment axis SB. Adjustment section 193G is assigned to the activation position AK of deactivation mechanism 197 and projects further in front of adjustment axis SB than adjustment section 193H, which is assigned to the deactivation position DK. In other words, adjustment section 193H deflects depth adjustment member 199 slightly further from adjustment axis SB, whereby the actuating receiver arm 90, due to the spring force of spring assembly 94, moves further away from actuating actuator 71 and guide slot 74 than in activation position AK. Adjustment section 193G, which projects further in front of adjustment axis SB, then acts to deflect or actuate actuating receiver arm 90 further in the direction of actuating actuator 71, in which position actuating receiver 72 is in contact with actuating actuator 71.

[0222] Spring 196E bears against a step on the adjusting body 193 (on whose outer circumference an adjusting contour 193D is provided) and against a step on the outer circumference of the support body 196, thereby urging the adjusting body to a friction fit or locking position in the correspondingly adjusted deactivated position DK or activated position AK. For example, spring 196E presses a radial projection or flange projection 193B, on the outer circumference of which an adjusting contour 193D is provided, against a support surface 196B. Support surface 196B is provided, for example, on the motor housing 33A.

[0223] When the sawing drive motor 12 is switched on and off, the pre-scribing drive motor 32 is regularly switched on and off via the switching element 60A. However, in the deactivated position DK of the deactivation mechanism 197, the pre-scribing drive motor 32 is not required. It is not a problem in itself that the pre-scribing drive motor 32 is also energized even when the pre-scribing unit 31 or 31X is in its deactivated position DK and / or in its inactive position IP. Although the pre-scribing tool 35 is then driven, it does not protrude in front of the guide surface 19 in the sense of engaging with the workpiece W and / or is accommodated in the protective housing 29. However, advantageously, in this case the pre-scribing drive motor 32 can be switched off, for example via the switching element 32S and / or 32S2. The switching element 32S or 32S2 is, for example, a component of the control mechanism 32T, which is arranged in the motor housing 33A or is assigned to it.

[0224] The motor housing 33A has, for example, a receiving part or a lower part 33B and a cover 33C, which, in the closed state, encloses or surrounds the pre-scored drive motor 32 and the control device 32T, so that these electrical components are protected from environmental influences.

[0225] The switching element 32S or 32S2 includes or is formed by a sensor, for example, a magnetic or other contactless sensor. The switching element 32S is arranged, for example, outside the motor housing 33A on a carrier 32H, such as a circuit board, and communicates with the control mechanism 32T. Alternatively or in addition to the switching element 32S, the switching element 32S2 is protected within the interior of the motor housing 33A and is, for example, a component of the control mechanism 32T. To operate the switching element 32S or 32S2, an operating element 32G, such as a magnetic transmitter or the like, is provided. The operating element 32G can be operated by the adjustment body 193. For example, the operating element 32G is accommodated in a retaining receptacle of the adjustment body 193, such as a pocket. The operating element 32G can also be easily arranged on the adjustment body 93. In any case, the operating element 32G can be displaced, for example, axially along the adjustment axis SA and / or rotated about the adjustment axis SA or SB, so that its relative position relative to the sensor or switching element 32S or 32S2 does not change. The switching element 32S communicates with the control mechanism 32T and transmits the corresponding position of the operating element 32G to the control mechanism. Depending on the corresponding position of the operating element 32G relative to the switching element 32S, the switching element or control mechanism 32T switches the pre-scoring portion drive motor 32 on or off, i.e., switches it on in the activated position AK and switches it off in the deactivated position DK of the adjusting body 93 or 193.

[0226] The pre-scribing tool 35 is explained below in the embodiments 35A, 35B, 35C, 35D. Insofar as the previously mentioned pre-scribing tools 35 - 35D have identical components, reference is also made to the pre-scribing tool 35 in a completely generic manner.

[0227] For example, each pre-scribing tool 35 has a blade body 310 with opposing flat sides 311 and 312. Scoring tooth assemblies 300A, 300B, 300C, and 300D are arranged in the pre-scribing tools 35A, 35B, 35C, and 35D at the radially outer periphery of the blade body 310. The scoring tooth assemblies 300A, 300B, 300C, and 300D have different numbers of scoring teeth 301-304. For example, the scoring tooth assembly 300A has four scoring teeth, 301, 302, 303, and 304, while the scoring tooth assembly 300B has only three scoring teeth 301, 302, and 303, the scoring tooth assembly 300C has only one scoring tooth 301, and finally, the scoring tooth assembly 300D has only two scoring teeth 301 and 302.

[0228] The blade body 310 has a machine receptacle 315 at its center ZV for detachable attachment to the pre-scoring tool receptacle 34 of the sawing machine 10. The center ZV is passed through the center axis or rotation axis DV of the pre-scoring tool 35, which is simultaneously the rotation axis of the pre-scoring tool receptacle 34 when the pre-scoring tool 35 is attached to the sawing tool 10.

[0229] The scoring teeth 301 - 304 project with their main cutting edges 350 beyond the radial outer periphery 313 of the blade body 310 or the pre-scribing tool 35 , so that they are ready to cut into the workpiece surface WO of the workpiece W at this point.

[0230] That is, the scoring teeth 301-304 project forward of the radially outer peripheral surface 314 of the blade body 310. The peripheral surface 314 has a substantially cylinder sleeve-shaped form.

[0231] There is a relatively large angular spacing between the scoring teeth 301-304. For example, in the pre-scribing tool 35, an angular spacing WA of approximately or exactly 90° is provided between the scoring teeth 301-304. In the pre-scribing tool 35B, an angular spacing WB of, for example, 120° is provided between the scoring teeth 301-303. In the pre-scribing tool 35C, there is only one single scoring tooth 301, resulting in an angular spacing of 360°. If two scoring teeth 301, 302 are present in the scoring tooth assembly 300D, they are preferably equidistant from one another and have an angular spacing WD of 180°.

[0232] In this regard, it should be mentioned that it is obviously also possible to set different angular spacings between the scoring teeth. For the sake of explanation, for example, the scoring teeth 303 in the pre-scoring tool 35A are shown with dashed lines. The angular spacing can, for example, not exist.

[0233] A cutting space 316 is provided before each scoring tooth 301-304. The cutting space 316 is formed by a deepening 317 of the blade body 310, which is designed radially inwardly from the radial outer periphery 313 as a recess, in particular, a U-shaped or V-shaped recess. Each deepening 317 or each cutting space 316 has a bottom 318, from which side surfaces 319, 320 extend in the direction of the radial outer periphery 313. The side surfaces 319, 320 are essentially straight. The side surfaces 319 face the corresponding main cutting edge 350 of the scoring tooth 301-304, while the side surfaces 320 of the cutting space 316 are, so to speak, opposite to the main cutting edge 350. An arc-shaped transition section 321 extends between the side surfaces 320 and the radial outer periphery 313 or the peripheral surface 314.

[0234] Apart from the cutting space 316, the radial outer circumference 313 extends circularly or annularly around the center axis (that is, the axis of rotation DV) of the blade body 310 or the pre-scribing tool 35. Thus, for example, the 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 when four scoring teeth 301-304 are provided, as in the case of the pre-scribing tool 35A.

[0235] Scoring teeth 301-304 each have a cutting element 330. Each cutting element 330 is secured to blade body 310, particularly to a side surface or near side surface 319, by a fixing portion 331. For example, side surface 319 may have a step into which a corresponding cutting element 332 is inserted. For example, such a step accommodates fixing portion 331. Fixing portion 331 of cutting element 332 is supported on the back side of blade body 310.

[0236] The section 332 of the cutting element 330 projects radially outwards in front of the blade body 310 with respect to the axis of rotation DV. The lateral sections 333 of the cutting element 330 project in front of the flat sides 311, 312. This means that the sections 332, 333 are mechanically loaded during operation of the pre-scribing tool 35, i.e., when it cuts into the workpiece W, but are optimally supported by the fastening section 331. Furthermore, it is advantageous if the cutting element 330 has a radially inwardly projecting support projection 334, which is also supported on the blade body 310.

[0237] The scoring teeth 301 - 304 , and therefore the cutting element 332 , have a main cutting edge 350 which runs, for example, parallel to the axis of rotation DV or the center axis of the pre-scribing tool 35 .

[0238] Additional cutting edges 351 extend transversely to main cutting edge 350. Additional cutting edges 351, for example, are arranged at an angle slightly greater than a right angle relative to main cutting edge 350, that is, for example, in the 90-110° range, with the main cutting edge located between additional cutting edges 351. For example, main cutting edge 350 and the corresponding adjacent additional cutting edge 351 enclose an angle 354 that is a minimum of 90° and a maximum of 110°. In this embodiment, angle value WI of angle 354 is, for example, approximately 7°.

[0239] The additional cutting edge 351 extends radially inwardly with respect to the axis of rotation DV, wherein the radially inner end region 355 is at a radial distance RD from the main cutting edge 350. The additional cutting edge 351, which runs slightly or flatly obliquely with respect to the flat sides 311, 312, enables the production of notches RI of varying depths, wherein the lateral width of the respective notches RI increases as the pre-scribing tool 35 sinks or penetrates deeper into the workpiece surface WO. In other words, the maximum depth Rmax of the notch RI is essentially determined by the radial distance RD.

[0240] However, in the present case, the notch RI can also be produced deeper if, for example, the side sections 352 of the cutting bodies 332 or scoring teeth 301 - 304 are also designed as cutting edges. The side sections 352 extend, for example, parallel to the center plane of the blade body 310 or at right angles to the rotation axis DV.

[0241] The score RI produced by the pre-scribing tool 35 has a score base RB, from which side surfaces RF extend to the workpiece surface WO. The lateral width of the base RB is determined by the lateral spacing Q1 of the additional cutting edge 351 in the region of the main cutting edge 350 or the length of the main cutting edge 350.

[0242] A step 353 is formed between the radially inner end of the side portion 352 and the corresponding flat side 311 , 312 .

[0243] The sawing tool 15 comprises, for example, a saw blade 15A. The blade body 370 of the saw blade 15A has mutually opposite flat sides 371 , 372 and has a saw tooth assembly 376 with saw teeth 377 at its radial outer periphery 373 about a rotation axis DS about which the saw blade 15A rotates during sawing operation.

[0244] The number of sawing teeth 377 is greater than the number of scoring teeth 301 - 304. Furthermore, the sawing teeth 377 have a smaller angular spacing relative to the rotation axis DS, about which the saw blade 15A is driven, than the scoring teeth 301 - 304 have relative to the rotation axis DV.

[0245] The sawing tool 15 is arranged and designed to saw or cut into a workpiece W from its underside WU. In its center ZS, the saw blade 15A has a machine receptacle 375 , through which the rotation axis DS or central axis of the saw blade 15A passes.

[0246] The radial outer periphery 373 has an outer diameter D73 which is, for example, three to four times greater than the outer diameter D13 of the outer periphery 313 of the pre-scribing tool 35 .

[0247] The inner diameter D75 of the machine receiving portion 375 of the saw blade 15A is larger than the inner diameter D15 of the machine receiving portion 315 of the pre-scribing tool 35 .

[0248] The maximum lateral width of the score RI in the region of the workpiece surface can be adjusted by not penetrating the pre-scribing tool 35 into the workpiece surface WO to varying depths. The maximum width of the score RI, that is, the maximum spacing of the score flanks RF, is determined by the lateral spacing Q2 that the additional cutting edges 351 have relative to one another in the region of the maximum radial distance RD. This means that the score RI can be at most as wide as the lateral spacing Q2.

[0249] This adaptation is particularly advantageous because the pre-scribing tool 35 can be used in conjunction with different sawing tools or saw blades, in any case with sawing tools whose cutting width or cutting width (with respect to the corresponding length parallel to the rotation axis DS) can be different. The above-mentioned adaptation is also advantageous in conjunction with manufacturing tolerances or dimensional tolerances of the sawing tools or saw blades and / or in conjunction with different immersion depths of the saw blade into the workpiece or the like.

[0250] The pre-scribing tool 35A can be adjusted with respect to its penetration depth into the workpiece W. The pre-scribing tool holder 34 is a component of the pre-scribing unit 31 and has a pre-scribing drive 23A. The pre-scribing drive 32A comprises a pre-scribing drive motor 32, which drives the pre-scribing tool holder 34 directly or via a transmission mechanism not shown in the schematic illustration, on which the pre-scribing tool 35 is arranged. For example, a mounting flange passes through the machine holder 315. A stepped transmission mechanism can be provided between the drive motor 32 and the tool holder 34, for example, so that the rotation axis of the tool holder 34 and the motor rotation axis of the drive motor 32 are not aligned with each other, in particular, the motor rotation axis of the drive motor 32 has a larger distance from the following area of the pre-scribing tool 35 than the drive rotation axis DV, which is provided for penetration into the workpiece W.

[0251] The sawing tool receptacle 14 , on which the machine receptacle 375 is arranged, can be driven by the saw drive motor 12 , for example directly or via a transmission mechanism (not shown in the figures).

[0252] Like the sawing unit 11, the pre-scribing unit 31 is arranged on the guide mechanism 17, for example, movably on the guide body 18 of the guide mechanism 17. Its guide surface 19 is provided for guidance along the workpiece surface WO. Both the sawing tool receptacle 14 and the pre-scribing tool receptacle 34 are adjustable in depth relative to the guide surface 19, projecting more or less far beyond the guide surface. This allows the penetration depth of the pre-scribing tool 35 and the sawing tool 15 into the workpiece W to be adjusted.

[0253] The sawing tool 15 is now adjusted or can be adjusted in such a way that its main cutting edge 380 cuts into the workpiece W from the workpiece underside WU. In addition, adjacent to the main cutting edge 380, an additional cutting edge 381 runs at an angle relative to the main cutting edge, which, as it were, forms a flank of a saw cut SAE that can be cut into the workpiece W by means of the sawing tool 15. In any case, the saw cut SAE has a sawing cut width SBB, which is caused on the one hand by the length of the main cutting edge 380 and on the other hand by the additional cutting edge 381, which, for example, is inclined in relation to the main cutting edge 380 in a manner similar to the additional cutting edge 351 in relation to the main cutting edge 350.

[0254] Because the saw teeth 377 penetrate into the workpiece W from the underside WU and emerge therefrom at the workpiece top WO, there is the risk that the flanks of the saw cut SAE will be cut in the area of the workpiece top WO. The pre-scribing tool 35 can now be adjusted or modified with respect to its penetration depth into the workpiece W or the amount by which the pre-scribing tool 35 protrudes beyond the guide surface 19 so that the score RI at the workpiece surface WO has a score width RBB that is greater than the saw cut width SBB. The sawing tool 15 or saw blade 15A then emerges from the workpiece W at the workpiece surface WO between the flanks RF of the score RI. This means that, for example, if a film, coating, plaque, or the like is applied to the workpiece surface WO, the film or coating is not touched or damaged by the saw teeth 377 emerging from the workpiece W.

[0255] The inclined inclination of the flank surface RF has the advantage that the notch RI has a simple step or inclination in the transition region to the workpiece surface WO.

[0256] The sawing drive motor 12 has an outer diameter D12, and the pre-scribing unit drive motor 32 has an outer diameter D32. The outer diameter D12 of the sawing drive motor 12 is smaller than the outer diameter D32 of the pre-scribing unit drive motor 32, compared to the outer diameter of the pre-scribing tool 35 or sawing tool 15 being driven. For example, the ratio of the outer periphery D73 to the outer periphery D12, or the quotient of the outer periphery D73 to the outer periphery D12, is greater than the ratio of the outer periphery D13 to the outer periphery D32, or the quotient of the outer periphery D13 to the outer periphery D32 of the pre-scribing unit drive motor 32.

[0257] The speed of the sawing tool holder 14 and the pre-scribing tool holder 34 can be adjusted, for example, by means of the adjusting means 12B and / or 32B. It is possible for the pre-scribing tool holder 34 to always operate at the same speed, while the speed of the sawing tool holder 14, for example the speed of the sawing drive motor 12, can be adjusted. In this case, a configuration is employed such that the pre-scribing tool holder 34 is driven or can be driven at a speed at least twice as high, preferably three or four times as high, as that of the sawing tool holder 14.

[0258] Furthermore, the directions of rotation VS and VR of the tool holders 14 and 34 are opposite. The tool holder 34 for the pre-scribing tool 35 is driven, for example, in a direction of rotation VR that corresponds to a synchronized saw. Thus, the direction of rotation VR acts such that the pre-scribing tool 35 is conveyed, as it were, along the workpiece W or drives the sawing machine 10 forward.

[0259] The rotational direction VS of the sawing tool receptacle 14 is adopted in such a way that the guide surface 19 is acted upon by a force in the direction toward the workpiece surface WO.

[0260] In the cutting body 330, the additional cutting edge and the main cutting edge are straight. Alternatively, however, additional cutting edges and / or main cutting edges with curved, for example concave or convex, main cutting edges and additional cutting edges or combinations thereof or with sections of different slopes and / or curvatures are possible.

[0261] For example, cutting element 330B has a main cutting edge 350 with a straight course, while additional cutting edge 351B, between which main cutting edge 350 is arranged, has edge sections 360B, 361B. Edge section 360B has, for example, a straight course. Edge section 360B is, for example, at a right angle to main cutting edge 350. In contrast, section 361B is flatly inclined relative to section 360B and has an angle of, for example, 103-105° relative to main cutting edge 350.

[0262] The cutting body 330C also has a main cutting edge 350, but has an additional cutting edge 351C with sections 360C and 361C. Section 360C is concave with respect to the median plane MI running between the flat sides 311 and 312 of the blade body 310, but with a smaller curvature, that is to say section 361C.

[0263] To illustrate this convex course, a cutting body 330D is shown, the additional cutting edge 351D of which is concave with respect to the median plane MI.

[0264] As an alternative to a straight main cutting edge 350 , for example, a main cutting edge 350D can be provided which has a convex course in a direction away from the sheet body 310 .

[0265] Furthermore, while it is advantageous for the cutting bodies or scoring teeth of the pre-scribing tool to be symmetrical, i.e., to form cutting edges on opposite sides and thus in the region of each flat side 311, 312, it is also possible for the scoring teeth or cutting bodies to have cutting edges only on the flat side 311 or 312. This is schematically illustrated on the cutting body 330B. For example, instead of the additional cutting edge 351B on the right in the drawing, the cutting body 330B can be provided with a side 359 that does not protrude in front of the flat side 311, and instead of the additional cutting edge 351B on the left in the drawing, the cutting body 330B located behind or ahead in the circumferential direction of the blade body 310 or the scoring tool 35 can be provided with a side 359 that does not protrude in front of the flat side 312.

Claims

1. A hand-held sawing machine (10) comprising a sawing unit (11), the sawing unit having a sawing tool holder (14) for a sawing tool (15), in particular a saw blade, and a sawing drive motor (12) for driving the sawing tool holder (14), and a guide mechanism (17), the guide mechanism having 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), wherein: By means of a sawing tool (15) protruding in front of the guide surface (19) during sawing operation of the hand-held machine tool, a sawing cut (SAE) can be introduced into the workpiece (W) along the working direction (AR), wherein the hand-held sawing machine (10) has a pre-scribing unit (31) arranged on the guide mechanism (17) before the sawing unit (11) with respect to the working direction (AR), the pre-scribing unit having a pre-scribing tool holder (34) for a pre-scribing tool (35), in particular a pre-scribing saw blade, and a pre-scribing drive (32A) for driving the pre-scribing tool holder (34), wherein by means of a pre-scribing unit protruding in front of the guide surface (19) during sawing operation of the hand-held machine tool, a pre-scribing cut (SAE) can be introduced into the workpiece (W) along the working direction (AR), wherein the hand-held machine tool (10) has a pre-scribing unit (31) arranged on the guide mechanism (17) before the sawing unit (11) with respect to the working direction (AR), the pre-scribing unit having a pre-scribing tool holder (34) for a pre-scribing tool (35), in particular a pre-scribing saw blade, and a pre-scribing drive (32A) for driving the pre-scribing tool holder (34), The tool (35) is capable of introducing a notch (RI) of a saw cut (SAE) to be introduced into the workpiece (W) in a working direction (AR), and is characterized in that the sawing tool holder (14) and the pre-scribing tool holder (34) are arranged directly next to a free longitudinal side (18A) of the guide body (18) extending parallel to the longitudinal axis (L) of the guide body (18) at the upper side (19A) of the guide body (18) opposite to the guide surface (19), so that the sawing tool (15) arranged at the sawing tool holder (14) and the pre-scribing tool (35) arranged at the pre-scribing tool holder (34) extend over the free longitudinal side (18A) of the guide body (18) and protrude in front of the guide surface (19).

2. The handheld sawing machine (10) according to claim 1, characterized in that The sawing tool holder (14), in particular the sawing unit (11), is movably supported as a whole on the guide mechanism (17) or with respect to the guide mechanism by means of a sawing depth adjustment support (16) between an upper depth adjustment position (OT) and at least one lower depth adjustment position (UT), wherein the sawing tool (15) projects further in front of the guide surface (19) in the lower depth adjustment position (UT) than in the upper depth adjustment position (OT).

3. The handheld sawing machine according to claim 1 or 2, characterized in that: The pre-scoring tool receiving portion (34), in particular the pre-scoring unit (31), as a whole is supported movably between at least one active position (AP) and an inactive position (IP) at the guide mechanism (17) or with respect to the guide mechanism by means of a pre-scoring depth adjustment support (36) separated from the sawing depth adjustment support (16), wherein in the active position, the pre-scoring tool (35) arranged at the pre-scoring tool receiving portion (34) protrudes in front of the guide surface (19), and in the inactive position, the pre-scoring tool (35) is adjusted back behind the guide surface (19).

4. A hand-held sawing machine according to any one of the preceding claims, characterised in that A covering wall (42) is opposite the free longitudinal side (18A) of the guide body (18), wherein the sawing tool (15) and / or the pre-scribing tool (35) are arranged between the free longitudinal side (18A) of the guide body (18) and the covering wall (42).

5. The handheld sawing machine according to claim 4, characterized in that The cover wall (42) forms a transverse side wall of the hand-held sawing machine (10), and the guide body (18) does not protrude laterally outwardly in front of the transverse side wall with respect to the longitudinal axis (L).

6. The handheld sawing machine according to claim 4 or 5, characterized in that: The free longitudinal side (18A) of the guide body (18) and the edge area of the covering wall (42) opposite the free longitudinal side limit a recess, which is particularly slit-shaped and open in the direction toward the guide surface (19), through which the sawing tool (15) and / or the pre-scribing tool (35) can protrude in front of the protective housing (29) and the guide surface (19).

7. The handheld sawing machine according to any one of claims 4 to 6, characterized in that The covering wall (42) has an obliquely inclined wall section at its edge region opposite the free longitudinal side (18A) of the guide body (18), which wall section is inclined obliquely toward the free longitudinal side (18A) of the guide body (18) relative to the guide surface (19).

8. The handheld sawing machine according to any one of claims 4 to 7, characterized in that The handheld sawing machine is provided with at least one viewing window (54) on the cover wall (42), through which at least a portion of the pre-scribing tool (35) and / or a portion of the sawing tool (15) can be seen.

9. The handheld sawing machine according to claim 8, characterized in that The at least one viewing window (54) is arranged at an edge region of the cover wall (42) opposite the guide body (18), in front of which the sawing tool (15) and / or the pre-scribing tool (35) protrudes during sawing operation of the handheld machine tool.

10. The handheld sawing machine according to claim 8 or 9, characterized in that The at least one viewing window (54) has such a longitudinal extension that a part of the sawing tool (15) and a part of the pre-scribing tool (35) lying opposite thereto are visible through the viewing window (54).

11. The handheld sawing machine according to any one of claims 8 to 10, characterized in that At the at least one viewing window (54), a covering element (53) is supported movably between an open position releasing the viewing window (54) and a covering position (ABS) covering the viewing window (54) by means of a bearing, in particular a sliding bearing.

12. The handheld sawing machine according to claim 11, characterized in that The covering element (53) is at least partially transparent or see-through so that the working area of the sawing tool (15) or pre-scribing tool (35) can be seen through the covering element (53) in its covering position (ABS) and / or the covering element (53) comprises a plate body or is formed thereby.

13. The handheld sawing machine according to claim 11 or 12, characterized in that The covering element (53) has a pre-scoring tool section (53B) for covering a part of the pre-scoring tool (35) and a sawing tool section (53A) for covering a part of the sawing tool (15), wherein the pre-scoring tool section (53B) and the sawing tool section (53A) preferably have different surface extensions and / or length extensions.

14. A hand-held sawing machine according to any one of the preceding claims, characterised in that At least one protective housing (29), in particular a protective cover, is arranged on the free longitudinal side (18A) of the guide body (18) for accommodating sections of the sawing tool (15) and / or pre-scribing tool (35) that do not protrude in front of the guide surface (19) in the direction of the workpiece (W) to be processed.

15. The handheld 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) before the free longitudinal side (18A) of the guide body (18) and / or the guide body (18) does not protrude transversely to the longitudinal axis (L) of the guide body (18) before the at least one protective housing (29), at least in the region of the sawing tool (15) or the pre-scribing tool (35).

16. A hand-held sawing machine according to any one of the preceding claims, characterised in that A guide profile (216), in particular a guide receptacle or a guide groove, extending parallel to the longitudinal axis (L) is arranged on the guide surface (19) for supporting on a mating guide profile (206) of the guide rail (200), in particular on a mating guide profile of a guide projection or a guide rib, so that the hand-held sawing machine is supported on the mating guide profile (206) with respect to the feed along the working direction (AR) and the sawing tool (15) and the pre-scribing tool (35) protrude through the longitudinal narrow side (204) of the guide rail (200) to its underside (201).

17. The handheld sawing machine according to claim 16, characterized in that The hand-held sawing machine comprises the guide rail (200) or forms part of a system comprising the hand-held sawing machine (10) and the guide rail (200).

18. The handheld sawing machine according to claim 16 or 17, characterized in that When the hand-held sawing machine (10) is arranged on the guide rail (200), the guide body (18) does not protrude transversely to its longitudinal axis (L) before the longitudinal narrow side (204) of the guide rail (200) and / or only the protective housing (29) of the hand-held sawing machine (10) that accommodates the sawing tool (15) or the pre-scribing tool (35) protrudes transversely to the longitudinal axis (L) of the guide body (18) before the longitudinal narrow side (204) of the guide rail (200).

19. A hand-held sawing machine according to any one of the preceding claims, characterised in that The sawing tool holder (14), in particular the sawing unit (11) as a whole and / or the pre-scribing tool holder (34), in particular the pre-scribing unit (31) as a whole are supported on the guide mechanism (17) by means of an angled support assembly (21A) so as to be pivotable about an angled axis (G), the angled axis being directly adjacent to and extending parallel to the free longitudinal side (18A) of the guide body (18).

20. The handheld sawing machine (10) according to claim 19, characterized in that The sawing depth adjustment support (16) and / or the pre-scribing depth adjustment support (36) are arranged on a carrier (40) which is particularly designed as a cover and / or a protective housing (29), and the carrier is arranged between the bevel supports (21, 22) of the bevel support assembly (21A) at the front along the working direction (AR) and at the rear along the working direction (AR).

21. A hand-held sawing machine according to any one of the preceding claims, characterised in that The pre-scribing unit (31) has a pre-scribing part dust removal mechanism for removing particles generated when the score (RI) is introduced into the workpiece (W) by the pre-scribing tool (35).

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