Portable Hand Saw with a Grooving Unit and Tool Exchange

Abstract

The present invention relates to a portable handheld saw machine including a saw unit (11) having a sawing tool holder (14) for a sawing tool (15) and a sawing drive motor (12) for driving the sawing tool holder (14), and a guide device (17), wherein the guide device includes a guide body (18) having a guide surface (19) extending along a longitudinal axis (L) for guiding the handheld saw machine (10) along a working direction (AR) on a workpiece (W) or a guide rail (200), and the guide surface (19) is moved during sawing operation of the handheld machine tool. The present invention relates to a portable hand-held saw machine capable of making saw cuts (SAE) in a workpiece (W) along a working direction (AR) using a saw tool (15) that protrudes in front of a saw drive motor (12) (19), and the hand-held saw machine has a safety device (100) for safely fixing a sawing tool holder (14) for tool replacement of the saw tool (15), the safety device (100) safely fixing the sawing tool holder (14) so ​​that it is not driven by a sawing drive motor (12) in a safety position (SG) and releasing it in a saw operating position (FS). The handheld saw (10) comprises a creasing unit (31) having a creasing tool holder (34) for a creasing tool (35), in particular a creasing tool saw blade, arranged in a guide device (17) in front of the saw unit (11) in a working direction (AR), and a creasing tool drive (32A), in particular a creasing tool drive motor (32) for driving the creasing tool holder (34), so that during creasing operation of the handheld saw tool, a creasing tool (35) protruding in front of the guide surface (19) can be used to make a creasing mark (RI) in a workpiece (W) that is positioned in front of a saw cut (SAE) to be made in the working direction (AR), and a safety device (100) safely fixes the creasing tool holder (34) in a safety position (SG) so that it cannot be driven by the creasing tool drive (32A) and releases it in a saw operating position (FS).

Description

Technical Field

[0001] The present invention relates to a portable hand sawing machine comprising a saw unit having a sawing tool receiving part for a saw tool, in particular for a saw blade, and a sawing drive motor for driving the sawing tool receiving part, and a guide device, wherein the guide device comprises a guide body having a guide surface extending along a longitudinal axis for guiding the hand sawing machine along a working direction on a workpiece or a guide rail, and a saw cut can be made in the workpiece along the working direction using a saw tool protruding in front of the guide surface during the sawing operation of the hand sawing machine, and the hand sawing machine has a safety device for safely fixing the sawing tool receiving part for tool replacement of the saw tool, and the safety device safely fixes the sawing tool receiving part so as not to be driven by the sawing drive motor in a safety position and releases it in a sawing operation position, and relates to a portable hand sawing machine.

Background Art

[0002] Therefore, it is possible to perform a safe and reliable tool replacement of a saw tool using a known hand working machine. This type of hand sawing machine is described, for example, in European Patent No. 1193036, German Patent Application Publication No. 102013020723 or German Patent Application Publication No. 102013020725. The operator pivots the saw unit in the direction of the workpiece to make a saw cut in the workpiece. At that time, a guide device in the form of a so-called saw table or guide plate is guided along the workpiece. The teeth of the saw blade used as the saw tool cut into the lower surface of the workpiece and come out from the upper surface of the workpiece. At that time, elements of the workpiece, such as chips, etc., are torn at the edge next to the saw cut, and it is quite possible that, for example, the cut edge becomes unclean.

[0003] A plunge circular saw with an output shaft lock can be read from German Patent Application Publication No. 102015104706.

Prior Art Documents

Patent Documents

[0004] [Patent Document 1] European Patent No. 1193036 [Patent Document 2] German Patent Application Publication No. 102013020723 Specification [Patent Document 3] German Patent Application Publication No. 102013020725 Specification [Patent Document 4] German Patent Application Publication No. 102015104706 Specification [Patent Document 5] German Utility Model No. 7324551 Specification [Patent Document 6] German Patent Application Publication No. 3800935 [Patent Document 7] German Utility Model No. 9106212 Specification [Patent Document 8] U.S. Patent No. 5287786 [Patent Document 9] German Patent Application Publication No. 19581444T1 Specification [Overview of the project]

[0005] Therefore, the object of the present invention is to provide a handheld saw machine with improved cutting behavior, but which nevertheless offers reliable and safe tool changes.

[0006] To solve the above problems, the handheld saw machine of the type described at the beginning is intended to have a grooving unit that includes a grooving tool housing for a grooving tool, particularly a grooving tool saw blade, positioned on a guide device in front of the saw unit in the working direction, and a grooving device drive device, particularly a grooving device drive motor, for driving the grooving tool housing, and that allows a grooving tool that protrudes in front of the guide surface during the grooving operation of the handheld machine tool to make a groove in the workpiece that is positioned in front of the saw cut to be made in the working direction, and that the safety device safely fixes the grooving tool housing in a safe position so that it is not driven by the grooving device drive device, and releases it in the sawing position.

[0007] In this way, the saw cutting is improved, and not only the saw tool but also the grooving tool can be changed more reliably and safely. In other words, the existing safety mechanism itself makes the tool change of the grooving tool safer.

[0008] In essence, the electrical safety measure involves the grooving unit having a separate grooving device drive motor from the saw-driving motor, and a safety device in a safe position intended to simultaneously cut off the power supply to both the saw-driving motor and the grooving device drive motor. For example, a main switch can be provided that can simultaneously turn off the power supply to both the saw-driving motor and the grooving device drive motor. The main switch can also be configured, for example, as an emergency stop switch. Preferably, the main switch is provided separately from, or in addition to, a switch that itself is provided to switch the saw-driving motor on and off.

[0009] A preferred concept is that the saw unit is equipped with a switch for switching the saw-driving motor on and off, which can also switch the grooving device driving motor on and off, and the safety device has a switch-shutting member for preventing the switch from being switched on in a safety position, the switch-shutting member being configured to interrupt operation of the switch in the direction of the switch-on position intended for energizing the saw-driving motor and / or the grooving device driving motor. The switch-shutting member, for example, engages with the operating element of the switch or reaches a rear-engaged position (Hintergreif-Stellung) where operation of the switch becomes impossible. Thus, the safety device achieves electrical switching off of both the saw-driving motor and the grooving device driving motor.

[0010] Preferably, the handheld saw machine comprises a blocking device having a sawing block member for immovably blocking a sawing tool housing and / or a grooving device block member for immovably blocking a grooving device tool housing, each of which, in the blocking position, is shape-coupled to a block contour fixedly connected to the sawing tool housing or the grooving device tool housing, and in the release position, releases the sawing tool housing or the grooving device tool housing to allow movement. Thus, the blocking device may have one or more blocking members, i.e., only one blocking member for the grooving device tool housing, or only one blocking member for the sawing tool housing. Each of these blocking members may be a manually operated blocking member independently of the safety device. The blocking member may include, for example, a sliding, swivelable member, or similar, and engage with a block contour, e.g., the block housing, on, for example, a drive shaft or other component of a drivetrain provided to drive the sawing tool housing or the grooving device tool housing. It is also possible to provide two mutually independent block devices, namely a block device having at least one block member for housing a sawing tool, and a block device having at least one block member for housing a grooving tool.

[0011] It is preferable that at least one of the block members or the entire block device constitutes a component of a safety device, or that it is operable by a safety device.

[0012] A preferred concept is, for example, that the safety device has an operating element for simultaneously operating the sawing block member and / or the grooving device block member to the blocked position and the switch cutoff member to the cutoff position. The operating element includes, for example, a swivel lever, a slide, or other similar component. A transmission device, such as a lever transmission, wire rope transmission, Bowden cable, or similar, may be placed between the sawing block member or grooving device block member and the operating element. A transmission device, such as a lever transmission, may also be provided between the operating element and the switch cutoff member. However, it is also possible for the operating element to act directly on each block member or switch cutoff member. A lever transmission, Bowden cable, wire rope, or similar mechanical coupling may be provided between the sawing block member and the grooving device block member, so that when the sawing block member is adjusted between the blocked position and the released position, the grooving device block member is adjusted between the blocked position and the released position.

[0013] Furthermore, the groove-grooving device block members and / or saw-cutting block members may be electrically or otherwise motor-driven, such as by electromagnets, rotational drives acting on each block member via racks, or similar means. The groove-grooving device block members and / or saw-cutting block members can be loaded into the open position or the blocked position by springs, thereby allowing each block member to be adjusted to the blocked position or the open position against the force of the springs.

[0014] Furthermore, sensors are provided to detect the position of each safety device, and these sensors can control the motor drive of the groove-grooving device block members depending on the position of the safety device.

[0015] In the case of a handheld saw, it is preferable that the sawing block member and / or the grooving device block member have operating contours separate from the safety device, such as operating surfaces, hand grips, or similar features, which are provided for manual operation by the operator. Thus, each block member can be detached from or removed from the safety device and operated independently of the safety device. Basically, block members that are operable or operated by the safety device are also operable independently of the safety device and may have, for example, hand grips or other similar operating contours for gripping or operating by the operator. For example, an embodiment in which the sawing block member is operable by the safety device, while the grooving device block member is manually operable and independently of the safety device is preferred.

[0016] Basically, it is possible for the saw tool housing or the entire saw unit to be fixed to the guide device, or at best, movably supported around the bevel cutting axis. However, it is preferable that the saw tool housing, especially the entire saw unit, is movably supported to or relative to the guide device using a saw depth adjustment bearing between an upper depth adjustment position and at least one lower depth adjustment position in which the saw tool housing is adjusted to be closer to the guide surface than the upper depth adjustment position, thereby allowing the saw tool to protrude further in front of the guide surface in the lower depth adjustment position than in the upper depth adjustment position, and that the handheld saw has a saw depth adjustment device for adjusting a depth adjustment position which is one of the lower depth adjustment positions of the saw tool housing and allows free access to the tool housing for changing the saw tool, and that the safety device is configured to operate the saw depth adjustment device for adjusting the tool change depth adjustment position. By using a sawing depth adjustment device, the saw tool can be adjusted without issue to other depth adjustment positions, particularly one or more depth adjustment positions, which protrude in front of the guide surface at different sizes to make saw cuts of different depths in the workpiece.

[0017] Regarding the tool change of the saw tool, the following measures are advantageous. Advantageously, it is contemplated that the saw depth adjustment device has a locking device (Rasteinrichtung) for locking (Verrasten) the saw tool receptacle, in particular the entire saw unit, in the tool change depth adjustment position. Thus, the saw tool receptacle remains stationary in the tool change depth adjustment position.

[0018] The locking device can be manually actuated or deactivated, for example, by a manually operated element. However, preferably, it is contemplated that a safety device is formed to actuate the locking device for locking the saw tool receptacle in the tool change depth adjustment position.

[0019] The upper depth adjustment position is preferably formed such that the saw tool attached to the saw tool receptacle does not protrude in front of the guide surface, that is, there is no risk of injury even if the saw drive motor is switched on.

[0020] Advantageously, it is contemplated that the hand-held saw has a depth locking device for locking the saw tool receptacle, in particular the entire saw unit, in the upper depth adjustment position. In the case of a safety device, it is advantageous to have an operating element for operating the depth locking device to release the saw tool receptacle in order to move the saw tool receptacle to the tool change depth adjustment position when adjusting the safety device to the safe position.

[0021] The tool storage part of the graining device can be fixedly connected to the sawing tool storage part with respect to depth adjustment, whereby both tool storage parts can be adjusted simultaneously between different depth adjustment positions. However, it is preferably possible to adjust them individually. Preferably, the tool storage part of the graining device, particularly the entire graining unit, is provided with a graining device depth adjustment bearing separate from the sawing depth adjustment bearing, and the graining tool arranged in the tool storage part of the graining device is movable between at least one active position where it protrudes in front of the guide surface and a non-active position where the graining tool retracts behind the guide surface, and is intended to be supported on or against a guiding device. The non-active position is, so to speak, a safe position where the graining tool cannot cause damage. The safety device is preferably formed so as to operate the tool storage part of the graining device to a tool exchange position that allows free access to the tool storage part for tool exchange of the graining tool and corresponds to at least one of the non-active position or the active position.

[0022] The sawing depth adjustment bearing and the graining device depth adjustment bearing are preferably arranged on the guide body at a longitudinal distance with respect to the working direction.

[0023] The sawing depth adjustment bearing and the graining device depth adjustment bearing are preferably arranged separately from each other on the guide body.

[0024] The sawing depth adjustment bearing and the graining device depth adjustment bearing advantageously do not have common bearing components.

[0025] For example, the safety device can have an operating element as described particularly in relation to the depth adjustment of the sawing tool storage part, and this operating element operates a graining device locking device for the tool storage part of the graining device that locks the tool storage part of the graining device in the non-active position when adjusting the safety device to the safe position, and releases it to move the tool storage part of the graining device to the tool exchange depth adjustment position.

[0026] However, by linking the two tool housings or the saw unit and the slitting unit to each other in motion, it is also possible to simultaneously adjust the sawing tool housing to the tool change depth adjustment position and the slitting device tool housing to the tool change position. Preferably, the handheld saw machine has a guide device, and the guide device is intended to guide and adjust the slitting device tool housing to the tool change position when the sawing tool housing is moved to the tool change depth adjustment position.

[0027] It is advantageous for a handheld sawing machine to have at least one protective housing, such as a protective hood, for the sawing tool and / or the grooving tool, to accommodate the portion of the sawing tool or grooving tool that does not protrude in front of the guide surface in the direction of the workpiece to be processed. Separate or common protective housings may be provided for the sawing tool and the grooving tool. The protective housing is used, for example, to reduce the risk of injury and / or to discharge chips.

[0028] It is advantageous if, in the case of at least one protective housing, particularly the cover or upper wall of at least one protective housing, it has at least one void, in particular a window, through which the sawing tool housing and / or the grooving device tool housing can be accessed for the installation and removal of sawing tools or grooving tools in the above or one tool-changing position intended for tool changes in the respective tool housings. For example, a window may be provided for the sawing tool housing and a void may be provided in the free edge region of the protective housing for the grooving device tool housing.

[0029] Basically, the saw tool and the grooving tool can either protrude equally in front of the protective housing in the above or one of the positions intended for tool changes, or at least one of the tools may not protrude at all in front of the protective housing. However, the saw tool is usually larger than the grooving tool. Therefore, the saw tool may be intended to protrude more than the grooving tool and in front of at least one of the protective housings in the above or one of the tool change positions intended for tool changes of the saw tool or the grooving tool.

[0030] In the case of a creasing tool, the risk of injury during tool changes can be reduced by, for example, the following measures. Advantageously, the creasing tool is intended not to protrude more freely in front of the protective housing than when the creasing device depth adjustment means is in its fully adjustable active position, corresponding to the maximum adjustable depth of the creasing tool's entry into the workpiece, in the above or one tool change position intended for tool changes. Furthermore, it is also advantageous if the creasing tool in the tool change position protrudes more freely in front of the protective housing than is necessary to sever an adult operator's finger, and / or less than 8 mm, preferably a maximum of 7 mm.

[0031] The grooving tool and / or saw tool is preferably formed as a saw blade, particularly a circular saw blade. However, the saw tool could also be, for example, a jigsaw, or another type of non-circular saw blade. Furthermore, the grooving tool may also comprise, or consist of, for example, a milling head or milling tool.

[0032] It is preferable that the saw tool and the scoring tool be formed as saw blades. In that case, one advantageous embodiment is intended to ensure that the ratio of the outer diameter of the saw tool to the outer diameter of the saw pull drive motor is greater than, in particular at least 1.5 times greater, preferably 2 times greater, and even more preferably at least 2.5 times greater than, the ratio of the outer diameter of the scoring tool to the outer diameter of the scoring device drive motor.

[0033] A handheld saw is a saw that is manually guided along a workpiece. This machine can be freely guided on the workpiece, i.e., it can be moved without guide rails. However, it is preferable to move it using guide rails. Preferably, the handheld machine tool is a plunge saw and / or does not have protective covers for the saw tool and / or grooving tool parts that protrude freely in front of the guide surface.

[0034] The saw unit and the slicing unit are positioned on the upper surface of the guide device opposite the guide surface. The guide device includes, for example, a so-called saw table. The guide device or guide body preferably comprises a plate body on which a guide surface is positioned on one side, and the saw unit and slicing unit are positioned on the opposite side or upper surface from the guide surface. The guide surface preferably has guide housings for guide ribs or guide projections of the guide rail, such as longitudinal grooves or similar.

[0035] The saw-driving motor and / or the grooving device driving motor are preferably electric motors, particularly universal motors or brushless electronically rectified motors or DC motors. Different types of motors can be used as the saw-driving motor and the grooving device driving motor; for example, an electronically rectified motor can be used as the saw-driving motor and a DC motor as the grooving device driving motor.

[0036] An embodiment of the present invention will be described below with reference to the drawings. [Brief explanation of the drawing]

[0037] [Figure 1] Figure 1 is a perspective view from the front at an angle of the handheld saw machine with the saw unit and grooving unit in the upper depth adjustment position. [Figure 2] Figure 2 shows the handheld saw machine according to Figure 1 in the lower depth adjustment position. [Figure 3] Figure 3 is a view from diagonally behind the handheld saw machine shown in Figures 1 and 2, which is on the guide rail at the slope cutting position. [Figure 4] Figure 4 is a detailed view of Figure 3, showing the lower part of a handheld saw and the front view of the guide rail, where the guide body and guide rail of the handheld machine tool are engaged with each other by an additional rear engagement contour. [Figure 5] Figure 5 shows a modified form of the handheld saw machine shown in the previous figure, which is equipped with a scoring unit that can rotate around the bevel cutting axis separately from the saw unit, or a scoring unit that is fixed relative to the bevel cutting axis. [Figure 6] Figure 6 is a side view of the handheld saw machine according to Figure 1, approximately in line of sight BR1, with the protective housing open and its saw unit in the upper depth adjustment position. [Figure 7] Figure 7 shows the right-hand portion of the diagram according to Figure 6, with the saw unit adjusted to the lowest depth adjustment position, but the grooving unit inactive. [Figure 8] Figure 8 shows the saw unit adjusted to the lowest depth adjustment position and the grooving unit adjusted to the active position, as shown in Figures 6 and 7. [Figure 9] Figure 9 is a diagram from Figure 8 showing the saw unit adjusted to the depth adjustment position for slitting only, and the slitting unit adjusted to the active position. [Figure 10] Figure 10 shows a detail D2 of a handheld saw machine, which is shown in Figure 10 from an oblique rear view, and is a diagram of a groove-only depth stopper device in the released position that allows adjustment of the saw unit according to Figure 8. [Figure 11] Figure 11 shows the groove-only depth stopper device according to Figure 10, which is in the stopper position corresponding to the groove-only depth adjustment position of the saw unit. [Figure 12] Figure 12 is a detailed view of the grooving unit from a diagonal front angle, approximately from the same line of sight as in Figure 1. [Figure 13] Figure 13 shows the grooving unit from Figure 12, viewed from diagonally behind, approximately corresponding to the line of sight in Figure 3, in the activated position. [Figure 14]Figure 14 shows the grooving unit according to Figure 13, with the grooving unit adjusted to the deactivated position. [Figure 15] Figure 15 is a cross-sectional view of the grooving unit according to Figure 13, approximately along the cutting line AA passing through the deactivation device. [Figure 16] Figure 16 is a diagonal front view of the grooving unit of the handheld saw machine shown in Figure 1. [Figure 17] Figure 17 is a smaller diagram showing detail D3 shown in Figure 17, and additionally shows a cross-section of the entire handheld saw machine, which is a partial cross-sectional view of the scoring unit according to Figure 16, approximately along the cutting line BB. [Figure 18] Figure 18 is a side view of the handheld saw machine shown in the previous figure, with the protective housing open, which is roughly equivalent to the diagram in Figure 6. [Figure 19] Figure 19 is a perspective view of the protective housing cover, taken from approximately the front at an oblique angle as shown in Figure 1. [Figure 20] Figure 20 is a diagram similar to Figure 18, showing a modified form of a handheld saw. [Figure 21] Figure 21 is a side view of another modified form of the handheld saw, which is roughly corresponding to the line of sight BR1 in Figure 1. [Figure 22] Figure 22 is a diagonal front view of the handheld saw machine shown in the previous figure, with the protective housing closed by the cover shown in Figure 19. [Figure 23] Figure 23 is a view of the front detail D4 shown in Figure 22, with the cover element adjusted to the open position. [Figure 24] Figure 24 is a diagram from Figure 23 showing the cover element adjusted to the cover position. [Figure 25] Figure 25 is a diagram of a portion of the cover shown in Figure 19, with the cover element adjusted to the open position, corresponding to the partial view shown in Figure 23. [Figure 26] Figure 26 is a diagram from Figure 25 showing the cover element adjusted to the cover position. [Figure 27] Figure 27 is a view of the handheld saw machine shown in Figure 1, from a diagonal rear angle, illustrating the handgrip body of the grooving device. [Figure 28]Figure 28 is a view of the handheld saw machine shown in Figure 27, from a diagonal front angle. [Figure 29] Figure 29 shows a modified form of the handheld saw machine according to Figure 27, equipped with an additional grooving device handgrip body. [Figure 30] Figure 30 is a view of the handheld saw machine shown in Figure 29, from a diagonal front angle. [Figure 31] Figure 31 is a side view of the handheld saw machine shown in the previous figure, with the safety device in the safe position. [Figure 32] Figure 32 is a perspective view of the safety device for the handheld saw machine shown in Figure 31. [Figure 33] Figure 33 is a schematic diagram of the handheld saw machine as seen from the side, based on the previous figure. [Figure 34] Figure 34 shows a modified form of the handheld saw machine according to Figure 33, which has a different transport device. [Figure 35] Figure 35 is a schematic diagram of a handheld saw machine equipped with manually and individually operated grooving units. [Figure 36] Figure 36 shows a handheld saw machine equipped with a motor-adjustable grooving unit. [Figure 37] Figure 37 shows a handheld saw machine equipped with a manually operable grooving unit via a power transmission element. [Figure 38] Figure 38 is a perspective view of a modified form of a grooving unit equipped with an alternative grooving device depth adjustment means and an alternative deactivation device in a deactivated position. [Figure 39] Figure 39 shows the groove-making unit according to Figure 38 in the activated position. [Figure 40] Figure 40 is a cross-sectional view along the cutting line CC in Figure 39, passing through the grooving unit. [Figure 41] Figure 41 is an exploded view of the grooving unit shown in Figures 38 to 40. [Figure 42] Figure 42 shows a creasing tool equipped with four creasing teeth. [Figure 43]Figure 43 is a diagram of a system comprising a scoring tool and a saw tool as shown in Figure 42, cut along the cutting line DD. [Figure 44] Figure 44 is a detailed view of D5 from Figure 43. [Figure 45] Figure 45 is a perspective view of the grooving tool shown in Figure 42, viewed from an oblique angle. [Figure 46] Figure 46 shows a creasing tool equipped with three creasing teeth. [Figure 47] Figure 47 shows a creasing tool equipped with one or two creasing teeth. [Figure 48] Figure 48 shows another embodiment of the groove teeth of a groove tool, which roughly corresponds to detail D5 in Figure 44, where the secondary cutting edges are at an angle to each other. [Figure 49] Figure 49 is a diagram of an alternative embodiment of a grooved tooth, which is similar in form to the grooved tooth in Figure 48 but has a concave secondary cutting edge. [Figure 50] Figure 50 shows another embodiment of a grooved tooth having a convex secondary cutting edge. [Figure 51] Figure 51 is a side view of a saw tool. [Modes for carrying out the invention]

[0038] The handheld saw machine 10 is formed, for example, in the form of a plunge saw, but may have, for example, a pendulum-type hood or other protective cover, and thus may be a pendulum-type saw.

[0039] The handheld saw machine 10 comprises a saw unit 11 having a saw-pulling drive motor 12, the saw-pulling drive motor housed in a motor housing portion 28 of the saw unit housing 13. The saw-pulling drive motor 12 drives the saw-pulling tool housing 14 directly or via a transmission device not shown in the drawing, allowing or locating a saw tool 15 in the saw-pulling tool housing. To hold the saw tool 15 in the saw-pulling tool housing 14, for example, a retaining screw or retaining element 14A is used.

[0040] Using the sawing depth adjustment bearing 16, the entire saw unit 11 can be rotated around the depth adjustment axis TS relative to the guide device 17 on which the saw unit 11 is positioned. Such rotational movement allows the saw tool 15 to be adjusted between the upper depth adjustment position OT and multiple lower depth adjustment positions, such as the lowest depth adjustment position UT as shown in Figure 2 or Figure 8. In the lower depth adjustment position UT, the saw tool 15 protrudes in front of the guide surface 19 of the guide body 18 of the guide device 17, for example, to make a saw cut in the workpiece W.

[0041] The guide surface 19 allows the guide body 18, and thus the entire handheld saw machine 10, to be guided, for example, directly along the work surface WO of the workpiece W in the working direction AR. The guide surface 19 extends along a longitudinal axis L parallel to the working direction AR.

[0042] However, the guide body 18 can also be guided, for example, along the upper surface or guide surface 202 of a guide rail 200 on which the lower surface 201 can be placed on the workpiece W. This makes it possible to make particularly precise and straight saw cuts into the workpiece W.

[0043] The guide rail 200 has a long shape with longitudinally narrow surfaces 203 and 204 that extend between the rear end face 207 and the front end face 208 in the working direction AR, along the longitudinal axis LS of the guide rail 200 which is oriented in the working direction AR. The saw tool 15 can enter the workpiece W by passing alongside this longitudinally narrow surface 204.

[0044] Furthermore, longitudinal ribs and optionally mating guide contours 206 in the form of accommodating grooves 205 extend parallel to the longitudinal axis LS. The accommodating grooves 205 are used, for example, to accommodate auxiliary means, clamping devices for fastening and securing the guide rail 200, or similar devices. The longitudinal ribs or guide contours 206 project upward in front of the guide surface 202 and are used to engage with the guide contours 216 on the guide surface 19 of the guide body 18. The guide contours 216 are formed, for example, as elongated accommodating grooves 217 extending along the longitudinal axis L of the guide body 18.

[0045] An alternative embodiment of the guide rail 200 is schematically shown, for example, in the form of a guide rail 200A. The guide rail 200A has a rear engaging projection 210 that projects in front of the guide surface 202, from which at least one rear engaging leg 211, preferably two opposing rear engaging legs 211, project laterally and transversely, forming, for example, a T-shaped structure. The rear engaging leg 211 engages with a housing 220 optionally provided on the guide surface 19, which has a rear engaging housing 221. For example, a support leg 222 projects in the direction of the housing 220 on the plane of the guide surface 19, and can be engaged from the rear by a rear engaging leg 211 that engages with the rear engaging housing 221. Thereafter, the guide device 17 is held to the guide rail 200A in a force direction perpendicular to the guide surface 18, but is nevertheless displaceable along the guide rail 200A in the working direction AR. The housing portion 220 and the rear engaging projection 210 have an elongated shape and extend in the direction of the longitudinal axis L or LS.

[0046] The guide body is hereafter referred to as the tool longitudinal side 18A, and has a longitudinal side on which the saw tool 15 is positioned, and a so-called toolless longitudinal side 18B that extends parallel to the longitudinal side 18A and similarly extends between the front end face and rear end faces 18C and 18D of the guide body 18.

[0047] The saw unit 11 is positioned on the upper surface 19A of the guide device 17 or guide body 18, opposite to the guide surface 19. The guide body 18 consists of, for example, a guide plate or is plate-shaped. While the guide surface 19 is substantially planar except for the housing contours positioned on this guide surface, in particular for example, the housing portion 220 and / or guide contour 216, the upper surface 19A supports functional components and / or may be reinforced by a rib structure. In particular, the operator can grip and / or operate the upper surface 19A, especially in the area of ​​the handgrip portion 18F near the front end surface 18C, to guide the hand-held saw machine 10 in order to bias, for example, the front portion of the guide body 18 toward the workpiece W or guide rail 200 in a force direction perpendicular to the guide surface 19. The handgrip portion 18F may be, for example, planar or include a planar surface. Advantageously, the handgrip portion 18F has a grip recess. However, the handgrip portion 18F may also include a grip element 218, such as a rod-shaped or toggle-shaped handgrip.

[0048] The saw unit 11 as a whole is biased toward the upper depth adjustment position OT using the saw unit spring assembly 20. The saw unit spring assembly 20 comprises, for example, a coil spring 20A. The coil spring 20A or the spring assembly 20 is supported on the upper surface 19A of the guide device 17 on the one hand, and on the lower surface of the saw unit housing 13 on the other hand.

[0049] In addition to depth adjustment centered on the depth adjustment axis TS, the saw unit 11 can be rotated around the bevel cutting axis G.

[0050] The handheld saw machine 10 has a support 40. The support 40 includes a protective housing 29. The saw unit 11 is held in place by the support 40.

[0051] The support 40 and / or protective housing 29 are pivotable about a bevel cutting axis G that extends parallel to the longitudinal axis L of the guide device 17, that is, they are supported by the guide device 17 using the bevel cutting bearing assembly 21A, specifically the bevel cutting bearing 21 in the working direction AR and the bevel cutting bearing 23 in the working direction. The bevel cutting bearings 21 and 22 are positioned near or directly on the front and rear end faces 18C and 18D of the guide body 18, that is, they constitute the foremost and rearmost components of the hand-held saw machine 10 in the working direction AR.

[0052] Each of the bevel cutting bearings 21 and 22 is equipped with a bearing base 23, particularly in the form of a plate, that protrudes upward from the upper surface 19A of the device 10, and a bearing body 24 is similarly preferably formed as a plate and supported on the bearing base so as to be rotatable around the bevel cutting axis G.

[0053] The bevel cutting bearings 21 and 22 can be fixed to the bevel cutting axis G at multiple pivotal positions using a fixing means 25. The fixing means 25 includes, for example, a clamping screw 25A that can bias the bearing base 23 and the bearing body 24 toward each other to a clamping position, thereby holding the bearing base and the bearing body together by force, and / or friction, and / or shape coupling, for example, by meshing teeth, and fixing the support 40 to the guide device 17 at an adjusted angular position relative to the bevel cutting axis G.

[0054] Instead of the concept of a support 40 in which the saw unit 11 and the scoring unit 31 are positioned to allow simultaneous rotation around the bevel cutting axis G using the bevel cutting bearing assembly 21A, a concept is also possible in which the scoring unit 31 can pivot around the bevel cutting axis G independently of the saw unit 11. For this purpose, for example, a bevel cutting bearing 22A is located between the scoring unit 31A, which itself corresponds to the scoring unit 31, and the saw unit 11, as in the embodiment of the handheld saw machine 10A shown in Figure 5. Naturally, like the bevel cutting bearings 21 and 22, this bevel cutting bearing 22A can also be fixed by fixing means 25, for example by clamp screws, thereby fixing the relative positions of the saw unit 11 and the scoring unit 31 with respect to the bevel cutting axis G.

[0055] However, in the embodiment shown in Figure 5, the saw unit 11 can rotate around the bevel cutting axis G, but it is also conceivable that the slitting unit 31A is fixed relative to the guide device 17 and positioned relative to the bevel cutting axis G. In this case as well, the bevel cutting bearing 22A is advantageously provided between the slitting unit 31 and the saw unit 11.

[0056] The support 40 comprises a protective housing 29 having a saw tool housing space 48 for housing a saw tool 15. The saw tool 15 is housed so as to be able to pivot around a depth adjustment axis TS so as to be able to pivot within the saw tool housing space 48, and the saw tool does not protrude in front of the saw tool housing space 48 in the upper depth adjustment position OT, but in the lower depth adjustment position, for example in the lowest depth adjustment position UT, it protrudes to the maximum extent in front of the protective housing 29 and the guide surface 19.

[0057] The sawing tool housing 14 is rotated in one direction around the tool rotation axis DS by the sawing drive motor 12 so that the sawing tool 15 cuts into the workpiece W from its lower surface WU, generating a saw cut SAE. The sawing tool 15 is a saw blade, and its teeth are driven at a rotational inclination relative to the guide surface 19, which can cause crack formation as the teeth exit the upper surface WO of the workpiece. To prevent this problem, the handheld sawing machine 10 has a scoring device module 30.

[0058] The creasing device module 30 includes a creasing unit 31 positioned in front of the saw unit 11 in the working direction AR. Similar to the saw unit 11, the creasing unit 31 is positioned on a support 40. The creasing device drive motor 32 drives the creasing device tool housing 34 around the tool rotation axis DV, but in a rotational direction opposite to the rotational direction of the tool rotation axis DS. The creasing device drive motor 32 constitutes the creasing device drive unit 32A.

[0059] The grooving tool 35, for example, a grooving device saw blade, can be detachably attached to the grooving device tool housing 34, particularly by a retaining element 34A, particularly a retaining screw. The grooving tool 35 is driven in one rotational direction, and its teeth cut from the workpiece surface WO into the workpiece W, producing a groove RI that is aligned with the saw cut subsequently made in the workpiece W by the saw tool 15. The groove is somewhat wider than the subsequent saw cut, so that the saw tool 15 does not come into contact with the longitudinal edge of the groove, and therefore no cracks are formed, or fewer cracks are formed, on the workpiece surface WO, and no or little chipping or similar material is removed.

[0060] A grooving unit housing 33, which protects and houses the important components of the grooving unit 31, is positioned on the support 40. Thus, while the grooving unit housing 33 is stationary relative to both the support 40 and the protective housing 29, the movable components of the grooving unit 31, particularly the grooving device drive motor 32 and the transmission between the grooving device drive motor 32 and the grooving device tool housing 34, are movably housed within the internal space of the grooving unit housing 33. It is advantageous for the grooving device drive motor 32 to be housed in a separate motor housing 33A, which is movable relative to the grooving unit housing 33.

[0061] The grooving unit 31 includes a grooving device support 80 which is supported on a support 40 around a depth adjustment axis TV by a grooving device depth adjustment bearing 36. The grooving device tool housing 34 is similarly housed in the internal space of the protective housing 29, i.e., the grooving tool housing space 49 of the protective housing.

[0062] The groove-grooving device support 80 is, for example, in the form of a block or a rectangular parallelepiped. The groove-grooving device support 80 has, for example, an elongated shape. The longitudinal axis of the groove-grooving device support 80 or the entire groove-grooving device support 80 is, for example, inclined with respect to the guide surface 19 at a shallow angle depending on the pivot position with respect to the depth adjustment axis TV, or is parallel to the guide surface 19 at several angular positions with respect to the depth adjustment axis TV.

[0063] The creasing device support 80 comprises a bearing portion 81 supported by a creasing device depth adjustment bearing 36 around a depth adjustment axis TV in the longitudinal end regions opposite to each other, and a motor portion 82 having a motor housing portion 83 that holds the creasing device drive motor 32. A stepped transmission device or a similar transmission device 84 can be arranged between the creasing device drive motor 32 and the creasing device tool housing portion 34. For example, based on the transmission device 84, the tool rotation axis DV and the motor rotation axis DM of the creasing device drive motor 32 can have a lateral distance from each other. For example, the motor rotation axis DM is at a greater distance from the guide surface 19 than the tool rotation axis DV, and therefore the motor rotation axis is very close to the guide surface 19. Therefore, for example, the creasing device drive motor 32 can have a larger diameter to generate a considerably larger torque than in the case of a type in which the motor rotation axis and the tool rotation axis DV are aligned in a straight line with each other.

[0064] To operate the sawing tool housing 14 between the upper depth adjustment position OT and the lower depth adjustment position UT, the entire saw unit 11 must be rotated around the depth adjustment axis TS. For this purpose, the operator can grasp, for example, the hand grips 26 and / or 27 located in the saw unit housing 13. The hand grip 26 is located behind the saw unit 11 in the working direction AR, and the hand grip 27 is located on the saw unit 11 in the front region of the saw unit housing 13 in the working direction AR. The two hand grips 26 and 27 have an elongated shape. The hand grip 26 has a longitudinal axis L26 that extends substantially parallel to the longitudinal axis L of the guide device 17, whereas the longitudinal axis L27 of the hand grip 27 extends laterally with respect to this longitudinal axis L. That is, the operator can generate torque around the depth adjustment axis TS by, for example, pushing the hand grip 27, thereby rotating the sawing tool housing 14 around the depth adjustment axis TS and moving the saw tool 15 in front of the guide surface 19.

[0065] The handgrip 27 simultaneously forms an operating element 27A that allows the operator to operate the saw unit 11 or the sawing tool housing 14 between depth adjustment positions, as well as the slitting unit 31. The operating element 27A, i.e., the operating handgrip 27B, acts on the slitting unit 31 via the guide device 70 to adjust the slitting unit 31 between an active position AP in which the slitting tool 35 protrudes in front of the guide surface 19 and an inactive position IP in which the slitting tool 35 retracts behind the guide surface 19 or does not protrude in front of the guide surface in any case.

[0066] The slitting device support 80, and therefore the slitting device tool housing 34, is subjected to a load in the direction of the inactive position IP by the slitting unit spring assembly 39. Conversely, when the saw unit 11 is operated from the upper depth adjustment position OT to the lower depth adjustment position UT, the guide device 70 guides the slitting unit 31 in the opposite direction, i.e., to the active position AP. Therefore, when the operator adjusts the handheld saw machine 10 to the lower depth adjustment position or the saw position, they work against two spring assemblies 20 and 39, so to speak, to adjust the saw tool 15 and the slitting tool 35 to the working position or saw position for cutting into the workpiece W. The two spring assemblies 20 and 39 act in opposite directions, so to speak, the inactive position or the safety position, and both of these spring assemblies act in a safety sense, i.e., to retract the saw tool 15 and the slitting tool 35 behind the guide surface 19.

[0067] The guide device 70 includes an operating body 71 on the saw unit 11 that acts on the operated body 72 of the slitting unit 31. The operating body 71 is formed as a link guide 73 and includes a guide link 74, along which the link follower 75 of the slitting unit 31, such as a roller or idler roller (Tastrolle), is guided and, for example, rolls. It is advantageous that the operating body 71 and the operated body 72 are located outside the protective housing 29.

[0068] The guide link 74 comprises a groove slitting device activation section 76 and a groove slitting device holding section 77, with a vertex 76A positioned between them. The groove slitting device holding section 77 of the guide link 74 or link track extends within a radius R centered on the depth adjustment axis TS. In contrast, the groove slitting device activation section 76 extends at an angle to the groove slitting device holding section 77 so that a link follower 75, guided along the holding section 77, operates the groove slitting unit 31, particularly the groove slitting device support 80, in the sense that the groove slitting device tool housing section 34 and therefore the groove slitting tool 35 are operated from an inactive position IP towards an active position AP along the motion track BB.

[0069] The grooving device activation unit 76 is configured such that when the saw tool housing 14 is adjusted from the upper depth adjustment position OT to the lower depth adjustment position UT, the grooving tool 35 is adjusted in advance of the saw tool 15 from the inactive position IP to the active position AP, and in the active position the grooving tool protrudes in front of the guide surface 19 to engage with the workpiece W at preferably the adjustable maximum entry depth or grooving depth Rmax. The grooving depth Rmax or the active position AP is already adjusted or adjustable when the saw tool 15 or the saw tool housing 14 or the saw unit 11 takes the depth adjustment position RT, before the saw tool 15 protrudes in front of the guide surface 19. This adjustment of the hand saw machine 10 corresponds to a pure grooving or grooving operation in which the grooving unit 31 or the grooving tool 35 is used solely for grooving the workpiece W.

[0070] A grooving-only depth stopper device 78 is provided so that the operator does not have to manually balance the saw unit 11 in the depth adjustment position RT during this pure grooving or grooving operation. This grooving-only depth stopper device 78 comprises a stopper member 79 that is movably supported on the saw unit 11, for example, and is slidable, and this stopper member is adjustable between a stopper position TA in which it strikes a mating stopper 79A located in the protective housing 29, and a release position TF in which the stopper member 79 can move beside the mating stopper 79A. This allows the saw unit 11 and therefore the saw tool housing 14 to be operated from the grooving depth adjustment position RT to a lower adjustment position UT in which the saw tool 15 protrudes in front of the guide surface 19 to cut into the workpiece W. For example, the stopper member 79 is supported on the motor housing portion 28 or the saw unit housing 13 so as to be displaceable laterally with respect to the longitudinal axis L.

[0071] The stopper member 79 is advantageously positioned near the handgrip 26, particularly in the upper region of the handgrip furthest from the guide device 17, so that the operator gripping the handgrip 26 can operate the stopper member 79 with their thumb between a stopper position TA and a release position TF in the slide guide (not shown in detail).

[0072] On this part of the handgrip 26, or in the area furthest from the guide device 17, there is also a main switch operating element 60 for operating a main switch 60A that can switch the sawing drive motor 12 and the grooving device drive motor 32 on and off.

[0073] The handheld saw machine 10 can be connected, for example, to an electrical energy supply network, such as a 120V or 230V AC voltage network, to supply electrical energy to the drive motors 12 and 32 and other electrical components of the handheld saw machine 10, using a connecting wire 67.

[0074] Alternatively, in addition to supplying power through an electrical energy supply network, an electrical energy storage device 67D, such as an accumulator, may be provided, for example, to supply energy to the saw unit 10 and / or the grooving unit 31.

[0075] A connecting wire 68 is provided to supply power to the slitting unit 31 via the saw unit 11. The connecting wire 68 is connected at its longitudinal end to the saw unit 11 on one end and to the slitting unit 31 on the other end by connecting parts 68A and 68B. An arc-shaped connecting part 68C or arc-shaped part extends between the connecting parts 68A and 68B.

[0076] However, it is also possible to supply electrical energy to the groove-grooving unit 31 by an electrical energy storage device 68D located, for example, on or inside the groove-grooving unit housing 33.

[0077] The connecting portion 68C extends in an arc towards the protective housing 29, starting from the longitudinal ends 68A and 68B, thereby creating an intermediate space between the longitudinal ends or 68A and 68B that is optimally suited for operating the components of the grooving unit 31.

[0078] In particular, the grooving device handgrip body 37 is accessible through the intermediate space between the connecting parts 68A and 68B, or through the internal space of the connecting part 68C, allowing the operator to apply operating force in the direction of the guide surface 19 within the area of ​​the grooving unit 31 using the grooving device handgrip body. The grooving device handgrip body 37 has a handgrip surface 37A, which is provided in particular on the upper wall 38 of the grooving unit housing 33. That is, the grooving unit housing 33 constitutes the grooving device handgrip body 37.

[0079] The handgrip surface 37A is provided with a grip recess 37B and a flat surface 37C. A grip projection 37D extends over the grip recess 37B, having an outer contour that fits, for example, the palm of the operator's hand.

[0080] The housing 33 further includes a side wall 38A extending next to the longitudinal side surface 18B of the guide body 18, and a front wall 38B extending parallel to the front end surface 18 of the guide body 18.

[0081] Since the housing 33 of the groove-cutting unit 31 is fixedly positioned on the support 40, the housing does not pivot around the depth adjustment axis TV, but is not rotatable relative to the depth adjustment axis TV. Therefore, the operator can support the housing 33, particularly on the upper wall 38 of the housing, and apply force to the hand-held saw 10 in the direction of the guide surface 19 and / or in the working direction AR to guide the hand-held saw 10 in the working direction AR. For support on the upper surface 19A of the guide body 18, the housing 33 has a support portion 38D.

[0082] It is advantageous that the housing 33 is ergonomically designed. For example, the upper wall 38 is tilted diagonally backward at a small angle with respect to the working direction AR, thereby allowing the operator to apply operating force to the housing 38 and thus to the handheld saw 10 in the working direction AR. It is advantageous that the upper wall 38 or the housing 33 has a grip projection 38C. The grip projection 38C is also suitable for housing the groove-scoring device drive motor 32 below it. The operator can be supported by the grip projection 38C or can grasp the grip projection, for example, with the palm of their hand. This realizes a particularly ergonomic operating concept.

[0083] In other words, the operator BE, as schematically shown, grasps the handgrip 26 with one hand to guide the handheld saw machine 10, and with this hand also operates the main switch 60 and the operating element 61A, and with the other hand, optionally grips the handgrip 27 as shown as hand position H1 in Figure 28, or is supported by the grooving device handgrip body 37 or housing 38 as shown as hand position H2.

[0084] An alternative operating concept, or an operating concept intended in addition to the handgrip 37, envisions an additional creasing device handgrip body 337. The handgrip body 337 is, for example, rod-shaped and has a handgrip surface 337A for the operator BE to grasp. The handgrip body 337 is attached to the protective housing 29 by a support 337B and protrudes from the protective housing toward the creasing unit 31.

[0085] The groove-marking unit 31 is positioned between the handgrip body 337 and the guide body 18. An intermediate space Z exists between the handgrip body 337 and the upper surface of the housing 33 of the groove-marking unit 31 on the side opposite to the guide body 18, allowing the operator to pass through this intermediate space and grasp the handgrip body 337.

[0086] The two handgrip bodies 37 and 337 extend laterally with respect to the longitudinal axis L of the guide body 18, particularly perpendicularly along the longitudinal axis L38. Preferably, the two handgrip bodies 337 and 37 extend to the so-called toolless longitudinal side 18B of the guide body 18. Preferably, the two handgrip bodies 37 and 337 extend from the longitudinal side or short side 18B towards the longitudinal side 18A where the tools 15, 35 are located, substantially across the entire width of the guide body 18, so that the two handgrip bodies provide ergonomic support for the operator to guide the handheld saw machine 10.

[0087] Furthermore, the saw unit 11 or the sawing tool housing 14 can be locked in the upper depth adjustment position OT by the locking device 61. The operating element 61A of the locking device 61, formed as a pressing operating element, is located in the upper region of the handgrip 26 or in the region furthest from the guide device 17. By operating the operating element 61A, the engagement of the operating element with the opposing contour 61B, for example, the rear engagement contour, can be released, thereby unlocking the saw unit 11 for adjustment from the upper depth adjustment position OT to one of the lower depth adjustment positions UT or the groove depth adjustment position RT.

[0088] The groove depth adjustment position RT and the other lower depth adjustment positions UT can also be adjusted using the sawing depth adjustment device 62 of the handheld saw 10. The sawing depth adjustment device 62 includes a depth stopper guide 63 that extends in an arc around the sawing depth adjustment bearing 16.

[0089] It is advantageous to also arrange, alongside the depth stopper guide 63, a guide link 74 that extends in an arc shape around the depth adjustment axis TS, at least in the area of ​​the groove-making device activation section 76.

[0090] The depth stopper 64 is supported on the depth stopper guide 63 in a manner that allows it to be adjusted to various depth adjustment positions, for example, in a displaceable manner. The depth stopper guide 63 comprises, for example, a guide groove, a guide slot, or the like. The depth stopper 64 can be fixed in place to the depth stopper guide 63 by a fixation 65, for example, a locking fixation, a clamping fixation, or the like.

[0091] A stopper body 66 is positioned on a movable saw unit 11 centered on a depth adjustment axis TS. This stopper body protrudes in the direction of the depth adjustment stopper 64 and strikes the depth adjustment stopper at the depth adjustment position adjusted by the respective depth adjustment stopper.

[0092] The grooving unit 31, and in particular its grooving device support 80, is supported by a grooving device depth adjustment bearing 36 on a support 40 that is pivotable around the bevel cutting axis G, so as to be pivotable around the depth adjustment axis TV. The grooving device depth adjustment bearing 36 comprises a bearing base 86 attached to the support 40. The bearing base 86 comprises a support plate 86A, for example, a flange or flange body from which a shaft member 86B protrudes. The support plate 86A is attached to the base wall 29A of the protective housing 29 by screws 86C, so that the shaft member 86B protrudes from the base wall 29A.

[0093] A bearing sleeve 86E is positioned on the outer circumference of the shaft member 86B, and another bearing member 86F is positioned on the outer circumference of the bearing sleeve. That is, the bearing sleeve 86E engages with the bearing housing of the bearing member 86F, thereby supporting the bearing member 86F so that it can pivot around the depth adjustment shaft TV by the bearing sleeve 86E. The bearing member 86F is fixedly connected to, for example, the groove-marking device support 80, and is housed, for example, within the housing of the groove-marking device support.

[0094] The bearing sleeve 86E is an option that improves rotational or swiveling ability around the depth adjustment axis TV. To this end, the bearing sleeve 86E improves the longitudinal displaceability of the grooving device support 80, and therefore the grooving unit 31, with respect to the lateral adjustment axis QS, so that the grooves made by the grooving tool 35 are aligned with the saw cuts made by the saw tool 15. It is advantageous that the lateral adjustment axis QS also corresponds to the depth adjustment axis TV.

[0095] The lateral adjustment device 87 is used to adjust the grooving device tool housing 34 with respect to the lateral adjustment axis QS. The lateral adjustment device 87 includes, for example, an adjustment screw as an adjustment member 87A, the head of which forms an operating element 87B. The operating element 87B may be provided with a handle on its radially outward side, for example, a wavy relief or similar, to facilitate operation by the operator BE. The threaded portion 87C engages with the adjustment housing 86D of the shaft member 86B and is screw-fastened to the adjustment housing. Therefore, by turning the adjustment screw or adjustment member 87A, the position of the operating element 87B can be adjusted along the lateral adjustment axis QS. That is, the threaded portion 87C is either screwed into the adjustment housing 86D or twisted out of the adjustment housing.

[0096] The operating element 87B protrudes in front of the shaft member 86B by a radial projection, such as a flange, in front of the lateral adjustment axis QS, thereby allowing the bearing sleeve 86E and / or bearing member 86F to be supported by this projection. Therefore, when the threaded portion 87C is screwed into the adjustment housing portion 86D, the operating element 87B guides the bearing member 86F along the lateral adjustment axis QS toward the support plate 86A of the bearing base 86, thereby adjusting the grooving device tool housing portion 34 so as to be away from the longitudinal side surface 18A of the guide body 18.

[0097] The spring 86H acts in the opposite direction to this adjustment direction, and the spring is supported on one side by the support plate 86A and on the other side by the bearing member 86F, and therefore acts with a force in the direction of the operating element 87B. The spring 86H engages with, for example, the spring housing portion 86G of the bearing member 86F, which is formed as a circumferential groove extending around the lateral adjustment axis QS. The bearing member 86F, the bearing sleeve 86E, and the shaft member 86B pass through the spring 86H.

[0098] By rotating the operating element 87B around the lateral adjustment axis QS, the position of the grooving device tool housing 34, and therefore the grooving tool 35, can be adjusted in opposite directions relative to the lateral adjustment axis QS, for example, by a maximum of 2.5 to 4 mm from the central position, relative to the longitudinal axis L of the guide body 18 and / or the cutting axis (Schnittachse) that can be created by the saw tool 15.

[0099] A locking device 88 is used to fix the operating element 87B or the adjustment member 87A, particularly for rotational fixing. The locking device 88 comprises a clip-shaped spring 88A or alternatively 188A with a locking member 88B formed at its free end. The locking springs 88B and 188B engage with a locking housing 88C, which is located on the radial outer circumference of the operating element 87B with respect to the lateral adjustment axis QS. By rotating the operating element 87B, the locking member 88B moves out of the locking housing 88C and locks into the next adjacent locking housing 88C in the circumferential direction. Thus, the locking device 88 fixes the lateral adjustment device 87 with respect to the respective adjusted lateral adjustments of the grooving device tool housing 34.

[0100] The operated body 72 is positioned on the operated body arm 90, that is, in the free end region of the operated body arm. A rotary bearing 90A for the wheel 90B is positioned there, and this wheel can rotate around the rotation axis D90 using the rotary bearing 90A in the free end region of the operated body arm 90, and is a link follower 75. In other words, the wheel 90 can roll on the guide link 74.

[0101] The operated arm 90 is supported by a bearing 91 so as to be able to pivot around a pivot axis corresponding to the depth adjustment axis TV in this case, relative to the creasing device support 80 of the creasing unit 31. As a result, the link follower 75 has different angular positions depending on the pivot position of the operated arm 90 relative to the depth adjustment axis TV or the creasing device support 80. By pivoting the operated arm 90 relative to the creasing device support 80 in the active position AP, it is possible to adjust different entry depths of the creasing tool 35 into the workpiece W, or different distances by which the creasing tool 35 protrudes in front of the guide surface 19. Therefore, the operated arm 90 forms part of the creasing device depth adjustment means 95.

[0102] The operating arm 92 protrudes from the operated arm 90 at an angle (winkelig) from the bearing portion 91. The operating arm 92 is provided with an operating surface 92A, and an adjuster 93 acts on this operating surface. By adjusting the relative position of the adjuster 93 with respect to the operating surface 92A, the operated arm 90, and therefore the link follower 75, can be adjusted so that it has a different operating distance BA with respect to the creasing device tool housing portion 34. The link follower 75, and therefore the operated body 72 and the creasing device tool housing portion 34, protrude from the bearing portion 81 of the creasing device support 80 in the form of arms toward opposite sides of each other.

[0103] The adjuster 93 supports the operating arm 92 against the force of the spring assembly 94. The spring assembly 94 is fixed on one side to the creasing device support 80 and on the other side to the operated arm 90, and comprises a coil spring 94A that biases it in a sense toward the support 90 or the creasing device tool housing 34. In contrast, the adjuster 93 acts in the opposite direction, that is, in the sense of adjusting the operated arm 90 away from the creasing device support 80, and therefore in the sense of increasing the operating distance between the operated body 72 and the creasing device tool housing 34.

[0104] The adjuster 93 is supported so as to be displaceable along axis SA with respect to the groove-grooving device support 80. Furthermore, the adjuster 93 is supported so as to be displaceable along axis SB in a lateral direction with respect to axis SA, in this case perpendicular to axis SA, and this degree of freedom of movement is assigned to the groove-grooving device depth adjustment means 95.

[0105] The adjuster 93 has a longitudinal end 93A on which an adjuster 93B is positioned for engaging with the operating surface 92A of the operating arm 92. An intermediate portion 93C of the adjuster 93 extends between the longitudinal end 93A and the operating end 93B, and the adjuster has an adjuster contour 93D in this central portion.

[0106] The adjuster 93 is displaceably supported with respect to the adjuster shaft SA in a bearing body 96 designed, for example, as a housing. For example, the bearing body 96 has bearing housings 96A, 96C, which are located in the wall or bearing sections 96B, 96D of the bearing body 96. The central portion 93C of the adjuster 93 extends between the bearing housings 96A, 96C, and the adjuster 93 protrudes in front of the bearing body 96 on opposite sides, namely, on one side with an adjuster surface 93B that engages with the operating surface 92A of the operating arm 92, and on the other side with an operating end or operating element 93E where a grip surface or similar adjuster surface for operator operation is located.

[0107] In other words, the operator can, for example, pull the operating element 93E in the direction of the adjustment axis SA, thereby disengaging the adjustment body 93 from the operating surface 92A, and thereby the spring assembly 94 can operate the operated arm 90 from the activated position AK to the deactivated position DK, away from the guide link 74. In the deactivated position DK, the link follower 75 is not engaged with the guide link 74 and has, for example, a distance F from the guide link 74 (Figure 7), thereby releasing the interlocking coupling of the interlocking device 70 between the saw unit 11 and the slicing unit 31. Thus, the saw unit 11 can be adjusted between its depth adjustment positions OT and UT without the slicing unit 11 being adjusted around the depth adjustment axis TV. The slicing tool 35 remains retracted behind the guide surface 19, i.e., inactive.

[0108] In other words, the regulator 93 is a component of the deactivation device 97 for deactivating or activating the transport device 70.

[0109] The adjuster 93 is loaded into its activated position AK by a spring 96E. The spring 96E is supported, for example, by the adjuster 93, for example, by a stepped portion near the central portion 93C, and by the wall 96D of the bearing body 96.

[0110] The operating end or operating element 93E is preferably provided with a rotation prevention part 93F fixed to the groove-grooving device support 80, for example, a plane that supports the operating end 93F so that it cannot rotate with respect to the adjustment shaft SA.

[0111] The adjustment contour 93D forms a component of the groove-grooving device depth adjustment means 95. The adjustment contour 93D, located on the radial outer circumference of the central portion 93C of the adjustment body 93, engages with the adjustment housing 98, and the position of the adjustment housing can be adjusted laterally with respect to the adjustment axis SA along the adjustment axis SB, and therefore laterally with respect to the adjustment axis SA using the depth adjustment member 99, for example, an adjustment screw. The operator can operate the depth adjustment member 99 using the operating element 99A.

[0112] Alternatively, the adjusting body 93 may be supported so as to be rotatable around the adjusting shaft SA, and the adjusting contour 93D may be an eccentric contour, thereby allowing the adjusting body 93 to rotate around the adjusting shaft SA, and the portion of the adjusting contour 93D that protrudes to varying degrees radially forward of the adjusting shaft SA to be supported by the adjusting housing 98, thereby allowing the adjusting surface 93B of the adjusting body 93 to take on different positions with respect to the adjusting shaft SB.

[0113] The depth adjustment member 99 comprises, for example, an operating element 99A, such as a head, from which a threaded portion 99B protrudes, and the threaded portion is screwed into a body 98A which is rotatably supported on a fixed component, such as a bearing body 96, relative to the groove-grooving device support 80 and provides an adjustment housing 98.

[0114] By screwing the depth adjustment member 99, the lateral position of the adjustment housing 98, which is, for example, U-shaped, can be adjusted laterally with respect to the adjustment axis SA, for example, along the adjustment axis SB. This simultaneously adjusts the position of the adjustment surface 93B, and therefore the position of the operating surface 92A of the operating arm 92 that contacts the adjustment surface, laterally with respect to the adjustment axis SA.

[0115] In the adjustment housing section 98, the adjustment body 93 is housed so as to be displaceable along the adjustment axis SA, thereby allowing the groove-grooving device depth adjustment means 95 to maintain its adjusted depth adjustment position even when the deactivation device 97 is operated by displacing the adjustment body 93 along the adjustment axis SA.

[0116] Between the grooving unit housing 33, which forms the grooving device handgrip body 37, and the saw unit housing 13, there is an intermediate space 33B with respect to the longitudinal axis L of the guide device 17 and guide body 18. In this intermediate space, the operator can easily access one or more of the operator's operating elements of the grooving unit 31, which are provided for the operator to operate, such as the operating element 93E of the deactivation device 97, the operating element 87B of the lateral adjustment device 97, or the operating element 99A of the grooving device depth adjustment means 95.

[0117] The handheld saw 10 is short relative to the longitudinal axis L of its guide body 18, i.e., between the end faces 18C and 18D. This is achieved, in particular, by the compact grooving device module 30 or grooving unit 31. Furthermore, it is advantageous that the depth adjustment axis TV is located between the tool housings 14 and 34. Thus, the handheld saw 10 has an extremely short front area in the working direction AR, rather than being top-heavy.

[0118] The placement of the tool housings 14 and 34, and therefore the saw tool 15 and the scoring tool 35, near the longitudinal side 18A of the guide body 18, or directly, also contributes to the ease of use of the handheld saw 10. In particular, this allows for a good view of the entry areas of the two tools 15 and 35 into the workpiece W. In addition, the bevel cutting axis G extends right next to the longitudinal side 18A, so that the tools 14 and 35 can rotate optimally not only around this longitudinal side 18A but also around the longitudinal narrow surface 204 of the guide rails 200 and 200A.

[0119] Furthermore, the handheld saw machine 10 provides an advantageous suction concept for dust and particles generated when sawing and scoring the workpiece W.

[0120] The saw tool storage space 48 and the grooving tool storage space 49 are equipped with saw dust discharge devices 48A and grooving tool dust discharge devices 49A. The storage spaces 48 and 49 extend to the guide surface 19, where the saw tool 15 protrudes in front of the guide surface 19 in one of the lower depth adjustment positions UT, and the grooving tool 35 protrudes in front of the guide surface 19 from their respective storage spaces 48 and 49 in its active position AP. The dust discharge devices 48A and 49A are flow-connected to a dust discharge coupling 52 located at the rear in the working direction AR of the handheld saw machine 10, and particularly at the rear and above on the protective housing 29. The dust discharge coupling 52, which is formed, for example, as a connecting tube, can be connected to a suction device SV, such as a suction hose SL of a work suction device, to suck up dust, particles, or similar materials generated during the sawing operation of the handheld saw machine 10.

[0121] The protective housing 29 has a fixed protective housing component 40A relative to the support 40, which is covered by a protective housing cover 41 that can be advantageously removed from the protective housing component 40A for maintenance purposes. Between the protective housing component 40A and the protective housing cover 41, accommodation spaces 48, 49 are formed for the upper tool portions 15, 35 relative to the guide device 17. The protective housing component 40A has a base wall 29A located opposite the cover wall 42 of the protective housing cover 41, for example.

[0122] A space 42A exists between the base wall 29A and the cover wall 42, which allows the tools 15, 35 to move away from the protective housing 29, thereby causing the tools to protrude in front of the guide surface 19. Adjacent to the space 42A, an inclined wall portion 42B of the cover wall 42 extends, which is inclined in such a way that the lateral distance between the cover wall 42 and the base wall 29A is reduced in the area of ​​the space 42A and / or further away from the guide surface 19, in the area of ​​the saw tool housing space 48 where the saw tool housing 14 is located.

[0123] The side walls 43C, 43 and 44C, 44, which abut and engage with each other at their end faces, protrude at an angle from the base wall 29A and the cover wall 42, thereby defining the accommodation spaces 48 and 49 with the side walls 43 and 44.

[0124] The side walls 43C, 43 are, for example, the rear side walls in the working direction AR. The side walls 44C, 44 extend over the protective housing 29 or along the portion furthest from the guide device 17, and along the front portion of the protective housing 29 in the working direction AR.

[0125] The protective housing 29 has a projection 45 from which a creasing tool housing space 49 is provided. The cover wall 42 extends to the projection 45, where, on the side opposite to the guide device 17, a side wall 46 and a side wall 47 project at an angle from the cover wall 42, forward in the working direction, i.e., toward the end face 18C. These side walls abut against a protective housing component 40A fixed to the support 40 on the end face side, thereby providing both the projection 45 as a whole and a creasing device housing space 49 closed toward the guide face 19, except for a through opening for the creasing tool 35.

[0126] In that case, in principle, it would be possible to draw in the two containment spaces 48 and 49 via the dust discharge coupling 52 without any further fluid technology measures. However, in this case, it is not taken into consideration that when the slitting tool 35 cuts into the upper surface WO of the workpiece, the slitting tool will eject particles toward the saw tool 15, which will significantly damage the cutting edge of the saw tool 15 in the working direction AR. To solve this problem, several measures described below are advantageous.

[0127] A dust discharge passage 50 extends from the protective housing 29 in the area opposite the guide device 17 to suck out dust, particles, or similar material. The dust discharge passage 50 is defined in the cover 41 or protective housing component 40A by side walls 44, 44C on the one hand and by intermediate walls 51, 51C located opposite the side walls on the other hand. The dust discharge passage 50 extends from the area in the working direction AR of the saw tool 15 to a dust discharge connector 52 located in the working direction AR.

[0128] In that case, in principle, the grooving tool storage space 49 would be able to communicate directly with the dust discharge passage 50. However, it is advantageous for the separation of the saw tool storage space 48 from the grooving tool storage space 49 to exist, at least in the area where the saw tool 15 and the grooving tool 35 directly face each other, i.e., near the guide surface 19, in the form of a partition wall 55. The partition wall 55 advantageously has a partition wall component 55C that is fixed to the protective housing 29, for example, a protective housing component 40A. The partition wall 55, in particular the partition wall component 55C, extends to the guide surface 19 and therefore stands between the saw tool 15 and the grooving tool 35.

[0129] On the side facing the grooving tool 35, the partition wall component 55C or partition wall 55 preferably has a flow guide surface 55E, for example, an inlet slope or an impact surface 55D, upon which particles generated by the grooving tool 35 collide and are deflected toward the dust discharge passage 50, i.e., thereby not flowing any further toward the saw tool 15.

[0130] In the area of ​​the partition wall 55C away from the guide surface 19, the grooving tool housing space 49 opens to an outlet opening 52C to the dust discharge passage 50, thereby mixing with the particle flow PS, which includes particles generated by the saw tool 15, indicated by the white arrows, and is shown as particle flow PV in Figure 18 with the black arrows, generated by the grooving tool 35.

[0131] The aforementioned partition wall 55 between the grooving tool 35 and the sawing tool 15 is also advantageous, and an alternative concept being considered is shown in Figure 21. However, in this case, the containment spaces 48 and 49 are completely separated from each other, and the grooving tool containment space 49 has a dust discharge connector 52B separate from the dust discharge connector 52 for discharging particles from the grooving unit 31, and another suction hose SL2 can be connected to this separate dust discharge connector. For example, the dust discharge connector 52B is provided with a connecting pipe piece for connecting the suction hose SL2, and this connecting pipe piece is also flow-connected to a suction device SV, for example, to generate a particle flow PV that carries away particles from the grooving unit 31. The particles generated by the sawing tool 15 flow to the suction device SV via the dust discharge connector 52 as a particle flow PS separated from the particle flow PV.

[0132] The dust discharge connecting sections 52 and 52B are provided with preferably shaped coupling contours 52A, such as a rotating shaped coupling contour or an insert shaped coupling contour, for shape coupling holding the suction hoses SL and SL2. Furthermore, it is advantageous if the dust discharge connecting sections 52 and 52B have a rotating bearing 52D, thereby allowing the suction hoses SL and SL2 to be rotatably supported on the handheld saw machine 10.

[0133] Simply by placing the tool housings 14, 34 and therefore the tools 15, 35 directly on the so-called free longitudinal side surface 18A of the guide body 17, optimal visibility of these tools is already provided. Furthermore, the viewing window 54 in the lower end region of the cover wall 42, particularly near the guide surface 19, is also advantageous.

[0134] The viewing window 54 is positioned in the area of ​​the cover wall 42 where the grooving tool 35 is located opposite the saw tool 15. This allows both tools to be viewed through the viewing window 54.

[0135] The viewing window 54 can be closed, for example, by a fixed, transparent wall made of plastic, thereby closing off the storage spaces 48 and 49 with this wall. However, in this case, a cover element 53, in particular a window body or window cover element, is provided.

[0136] The cover element 53 has a saw tool portion 53A and a grooving tool portion 53B, the saw tool portion is assigned to the saw tool 15 and the grooving tool portion is assigned to the grooving tool 35, and in either case the cover element 53 is positioned opposite the saw tool or the grooving tool when it is adjusted to cover position ABS and the cover element covers the viewing window 54.

[0137] The cover element 53 is adjustable in the cover wall 42 using bearings 53D, particularly sliding bearings, between a cover position ABS and an open position OS, in which the cover element opens at least partially, particularly the portion of the viewing window 54 facing the guide surface 19. Advantageously, an operating contour 53C, such as a rib or similar, is provided for gripping the cover element 53. The cover element 53 is adjustable to the open position OS by sliding it in one direction P1, and adjustable to the cover position ABS by sliding it in the opposite direction P2.

[0138] The cover element 53 has a partition wall portion 56 of the partition wall 55. The partition wall portion 56 engages with or contacts the stationary partition wall portion 55A in a telescopic manner, or so to speak, so that the partition wall 55 closes, in the cover position ABS and the open position OS. The partition wall portion 56 has, for example, a partition wall housing 57 having opposing side walls 56A. The stationary partition wall portion 55A can engage with the partition wall housing 57, and the partition wall portion engages with the partition wall housing 57 more deeply in the open position OS than when it is in the cover position ABS.

[0139] Furthermore, the cover wall 42 is provided with cavities 58 and 59, through which the tool housings 14 and 34 can be accessed for tool changes of the tools 15 and 35. It should be noted that it is advantageous for the retaining elements 14A and 34A to have identical operating contours for tools, such as slits for screwdrivers, which allow the retaining elements 14A and 34A to be removed for tool changes and fixed to the tool housings 14 and 34.

[0140] A block device 85 is provided for tool replacement of the grooving tool 35. The block device 85 includes a grooving tool block member 85A that, in a block position, engages with a block housing 85B which is located, for example, on the output shaft of a transmission device 84 and is connected to the grooving tool housing 34 in a way that prevents relative rotation. The block member 85A is axially displaceable along the adjustment shaft S85 in a guide 85C. By pressing the operating contour 85D in the end region of the block member 85A that freely protrudes in front of the guide 85C, the operator can engage the block member 85A with the block housing 85B, i.e., move it to a block position in which the grooving tool housing 34 is blocked in a way that prevents relative rotation. This block position can be released, for example, by pulling the block member 85A away from the block housing 85B. It is advantageous to provide a spring 85E, schematically shown in the drawing, which biases the block member 85A to a released position where it does not engage with the block housing 85B.

[0141] Alternatively, or in addition to the above, a motor drive device 85F, such as an electromagnet or electric linear drive, can be provided to adjust the block member 85A to a blocked position and / or a released position. For example, the drive device 85F can act on the blocked position, while the spring 85E acts on the released position. An electric switch 85G is provided to switch the drive device 85E, which can be operated, for example, by pressing or similar operation by an operator.

[0142] A safety device 100 is used for safe and easy tool changes of the saw tool 15 and / or grooving tool 35.

[0143] When the safety device 100 is adjusted to its safety position SG, it shuts off switch 60A to prevent the drive motors 12 and 32 from being switched on, and when it is adjusted to the saw operation position FS, it releases switch 60A to allow the drive motors 12 and 32 to be switched on. Therefore, for tool changes, the safety device 100 can lock both drive motors 12 and 32 to be switched on simultaneously.

[0144] The safety device 100 includes an operating element 101 that is supported on the protective housing 29 and / or on the handgrip 26 so as to be rotatable around a pivot axis DB. When the operating element 101 is swung away from the protective housing 29 or the handgrip 26, that is, when it is positioned in the safety position SG shown in Figures 31 and 32, the operator can immediately recognize the safety position SG. The operating element 101 includes a grip portion 102 with lateral legs, and in the saw operation position FS, a portion of the protective housing 29 is housed between the lateral legs. Therefore, the operating element 101 is in close contact with the protective housing 29 in the saw operation position FS and does not protrude in front of the protective housing in any case. The operator can grip the operating element 101 with the grip portion 102.

[0145] A motor drive device 101A, such as an electric motor, is also possible for the operating element 101, which can, for example, drive the operating element 101 to rotate or swivel, and which can be switched by an electric switch 101B, as schematically shown, which can be operated by an operator, for example, by pressing.

[0146] The grip portion 101 is positioned in the free end region of the operating arm 103 of the operating element 101, and the operating arm is supported by the protective housing 29 by the bearing portion 104 so as to be rotatable with respect to the pivot axis DB.

[0147] The operating member 101 operates the switch shut-off member 105 to shut off the switch 60A. The shut-off member 105 has an arm 106 that can be operated by the operating element 101, for example, so as to be displaceable and / or rotatable, and a rear engagement contour 107, for example a hook, is positioned in the free end region of the arm, and the rear engagement contour rear-engages with the operating element 60 of the switch 60A when the switch shut-off member 105 is in the shut-off position, thereby preventing the operating element from operating the switch 60A in the direction of the switch-on position.

[0148] Furthermore, it is advantageous if the operating element 101 is formed to disengage the locking device 61. For this purpose, for example, an actuator 108, such as a cam disc or similar, is motion-coupled to the operating element 101 in the sense that it rotates around an axis DB, and the actuator acts on an adjustment member 109, which operates the operating element 61A to disengage it from the opposing contour 61B when the operating element 101 is adjusted to the safety position SG. Thus, the saw unit 11 can pivot around the depth adjustment axis TS from the upper depth adjustment position OT to the tool change depth adjustment position WT, which is suitable for changing the saw tool 15.

[0149] A locking device 120 is provided to lock the tool change depth adjustment position WT. The locking device 120 has a locking element 121 that is pivotably supported around a pivot axis S12. The locking element 121 has a locking projection 122 for locking with a locking housing 123 that is fixed in the protective housing 29, for example, next to the depth stopper guide 63. A spring 124 applies a load to the locking element 121 in the direction of the locking position that can lock with the locking housing 123.

[0150] The locking device 120 can be activated and deactivated by the safety device 100. That is, when the operating element 101 is adjusted to the safety position SG, the safety device activates the locking device 120. The operating element 101 is motion-coupled to the actuator 110 to activate and deactivate the locking device 120, for example, in the sense of rotational motion. The actuator 110 has an operating link 111 on the side facing the locking element 121, and the operating link acts on the operating leg 125 of the locking member 121, and more precisely, when the operating element 101 is adjusted to the safety position SG, the locking member 121 is released by the spring 124 to engage with the locking housing 123 and / or the spring 124 is preloaded, whereas when the operating element 101 is adjusted to the sawing position FS, the locking member 121 is held in a state of disengagement from the locking housing 123 against the action of the spring 124 and / or the spring 124 does not have sufficient spring tension to engage the locking member 121.

[0151] When the sawing tool housing 14 is adjusted to the tool change depth adjustment position WT, the sawing tool housing is positioned in the area of ​​the cavity 58. The guide device 70 also adjusts the grooving tool housing 34 to a tool change depth adjustment position where this grooving tool housing is positioned within the cavity 59. Thus, the tool housings 14 and 34 are accessible for tool changes of the tools 15 and 35.

[0152] Furthermore, the operating element 101 can cooperate with or influence the blocking device 130, thereby blocking the sawing tool housing 14 from rotating around the tool rotation axis DS by the blocking device.

[0153] The block device 130 has a sawing block member 131 that engages with at least one block contour 132 which is connected to the sawing tool housing 14 in a way that prevents relative rotation at the block position. For example, several block contours 132 in the form of block notches 133 are arranged on a fan wheel 134 which is rotatably coupled to the sawing drive motor 12 and / or the sawing tool housing 14. The fan wheel 134 has, for example, fan blades 135. The block notches 133 are arranged on the radial outer circumference of the fan wheel 134.

[0154] The motor drive unit 101A of the safety device 100 also serves as a drive unit for adjusting the sawing block member 131 between a block position that blocks the sawing tool housing 14 and a release position that releases it.

[0155] The sawing block member 131 has a block projection 136 at one of its longitudinal ends, which can engage with one of the block notches 133 when the corresponding rotational position of the fan wheel positions the block notch opposite the block projection. The other longitudinal end of the sawing block member 131 is movably, in particular slidably, housed in a bearing not shown in the figure and is loaded in the direction of the block position by a spring 137. By adjusting the operating element 101 to the safety position SG, the sawing block member 131 is released to be operated by the spring 137, or the spring 137 is preloaded by the operating element 101 to operate the sawing block member 131, thereby preloading the block projection 136 to engage with one of the block notches 133. Next, when the sawing tool housing 14 is rotated slightly, one of the block notches 133 moves to a frontal position relative to the block projection 136, thereby engaging this block projection with the block notch 133 and fixing the sawing tool housing 14 against further rotation.

[0156] The safety device 100, adjusted to the safety position SG, electrically blocks and therefore prevents the switching of the creasing device drive motor 32 to the ON position. Thus, the operator can safely block the creasing device tool housing 34 and replace the creasing tool 35 by manually operating the blocking device 85.

[0157] Alternatively, or in addition to this manual operation, a mechanical interlocking connection not shown in the drawings may be provided between the grooving device block member 85A and the sawing block member 131, so that when the sawing block member 131 is adjusted to the block position, the grooving device block member 85A is simultaneously adjusted to the block position.

[0158] For example, if the transmission device for creating the connection between block members 85A and 131 is mechanically complex or requires a large amount of space, making a mechanical connection between block members 85A and 131 impossible or difficult, an electrical connection is also possible. For example, a sensor 101C is provided to detect the position of the safety device 100, for example, the position of the operating element 101. The sensor 101C detects, for example, whether the safety device 100 is in the safety position SG or the saw operation position FS. In the saw operation position FS, the sensor 101C controls, for example, the drive motor.

[0159] The guide device 70 is schematically shown in Figure 33. It can be seen that the operator can move the slitting unit 31 from the inactive position to the active position by rotating the saw unit 11, and that the force is transmitted by the guide device 70.

[0160] A schematic diagram shows the grooving device drive unit 32B of the grooving unit 31, in which, for example, a belt 32C or another similar force transmission element is motion-coupled to a saw-driving motor 32, which drives the grooving device tool housing 34. To apply tension to the belt, for example, a spring-loaded (angefedert) tension roller (spannrolle) and / or length compensation device, not shown in the drawing, may be provided.

[0161] In the embodiment of the handheld saw machine 10C shown in Figure 34, a guide device 70C is provided, and when the saw unit 11 is operated from the upper depth adjustment position shown in the drawing toward the lower depth adjustment position in which the saw tool 15 protrudes in front of the guide surface 19, the grooving unit 31 is guided by this guide device. However, the grooving unit 31C is loaded by the spring assembly 39C toward the active position in which the grooving tool 35 protrudes in front of the guide surface 19, and is not loaded toward the inactive position as in the handheld saw machine 10.

[0162] As the operating body 71C, the saw unit 11 is provided with a leading surface or stopper surface on which the operated body 72C of the slicing unit 31C is supported. The operated body 72C is, for example, positioned on an operating arm that protrudes from the slicing device depth adjustment bearing 36, starting from the slicing unit 31C. When the saw unit 11 is adjusted in the direction of the lower depth adjustment position of the saw tool housing 34, the operating body 71C releases the operated body 72C, so to speak, and the spring assembly 39C can adjust the slicing unit 31C from the inactive position to the active position.

[0163] In the active position, the grooving unit 31C advantageously strikes the grooving unit depth stopper 95D of the guide device 17 at the stopper projection 95C. For example, the depth stopper 95D can be adjusted to adjust for different depth adjustment positions or the active position if the depth stopper is formed by a screw head that can be screwed into the guide device 17. The stopper projection 95C is provided, for example, in the free end region of the arm of the grooving unit 31C that protrudes from the depth adjustment bearing 36.

[0164] In the embodiment of the handheld saw machine 10D, no guide device is provided between the saw unit 11 and the slicing unit 31D. The slicing unit 31D is supported by the guide device 17 so as to be able to rotate freely around the depth adjustment axis TV by the depth adjustment bearing 36 described above, and independently of the saw unit 11, but it needs to be operated manually by the operator. For this purpose, for example, the slicing device handgrip body 237D is provided in the form of an operating knob that protrudes upward from the slicing unit 31D relative to the guide device 17. Furthermore, advantageously, a stopper projection 95C for striking against the depth stopper 95D is provided on the slicing unit 31D.

[0165] A switch 60D is located on the handgrip body 237D to switch the drive motor 32 of the creasing unit 31D on and / or off. That is, the handgrip body 237D constitutes the operating body 71D for the creasing unit 31D.

[0166] For example, rotational drive is also possible to adjust the slitting tool 35 between an active position and an inactive position, and / or to adjust its penetration depth into the workpiece. For example, an adjustment motor 72D may be positioned in the slitting device depth adjustment bearing 36, and the slitting tool 35 can be adjusted between various depth adjustment positions by rotational drive around the depth adjustment axis TV.

[0167] However, a motor-driven concept for adjusting the grooving unit between its inactive and active positions is also advantageous, as will be demonstrated in the embodiment of the handheld saw 10E. The saw unit 11 of the handheld saw is manually rotated by the operator between an upper depth adjustment position and a lower depth adjustment position by a depth adjustment bearing 16, as described above, while an adjustment motor 72E is provided to adjust the grooving unit 31E. A sensor is used as the operator 71E of the guide device 70E to detect each rotational or relative position of the saw unit 11 with respect to the guide device 17, i.e., each adjusted depth adjustment position. The sensor or operator 71E is connected to and controls the adjustment motor 72E of the grooving unit 31E, i.e., the operated body, using a control connection, for example, a wireless or wired control connection not shown in the figure. Needless to say, the adjustment motor 72E is also controlled individually, i.e., disconnected from the operator or sensor 71E. For example, an electrical switching element 99E can be provided to allow the operator to individually control the adjustment motor 72E in order to score a workpiece without making a saw cut, or to adjust the scoring unit 31E to an inactive position in order to make only a saw cut by the saw tool 15. Furthermore, an inactivation device 97E, for example, an electrical switch that similarly allows the adjustment motor 72E to be operated in the direction of the inactive or upward position of the scoring device tool housing 34E, and / or allows the power supply to the adjustment motor 72E to be blocked in the direction of the active position of the scoring device tool housing 34E, is advantageous.

[0168] A deactivation device 97E and / or a switching element 99E can be provided without issue to control the rotary-driven adjustment motor 72D.

[0169] Unlike the aforementioned grooving unit, the grooving unit 31E is not pivotably supported by the guide device 17, but is displaceably supported along the depth adjustment axis TVS by a sliding support 36E. The spring 39E biases the grooving device support 80E, which holds the grooving device drive motor 32E, in the direction of the inactive position where the grooving tool 35E, driven by the grooving device drive motor 32E, retracts behind the guide surface 19. The adjustment motor 72E acts in the opposite direction to the spring 39E, i.e., operates the grooving tool 35E in the direction of the active position, thereby allowing the grooving tool 35E to protrude in front of the guide surface 19 and bite into the workpiece. However, the depth adjustment, i.e., the depth to which the grooving tool 35E enters the workpiece W, can also be adjusted using the adjustment motor 72E.

[0170] The grooving unit 31F of the handheld saw machine 10F is also linearly adjustable, that is, along the depth adjustment axis TVS using a depth adjustment bearing, particularly a sliding support 36F. The sliding support 36F comprises, for example, a guide rod or column on which the grooving device support 80F is displaceably supported relative to the depth adjustment axis TVS. The grooving device support 80F is biased by a spring assembly 39F to an inactive position in which the grooving tool 35F does not protrude in front of the guide surface 19.

[0171] The slitting tool 35F may itself be equipped with a saw blade or slitting blade, but, like the slitting tool 35E, it is advantageously a milling tool or milling head. The slitting tool 35F is driven by the slitting device drive motor 32F.

[0172] The grooving unit 31F is also adjustable between its inactive position and one or more active positions, independently of the saw unit 11.

[0173] However, unlike the handheld saw machine 10E, the grooving unit 31F can be adjusted manually, rather than by a motor, between an active and inactive position. A spring assembly 39F applies a load to the grooving device support 80F in the inactive position. In the direction of the active position, an operating body 71F is provided, which is a hand lever or other operating element pivotably supported on the saw unit 11. This operating element operates a force transmission element 90F, such as a Bowden cable, wire rope, pneumatic or hydraulic piping, or similar, by manual operation. The operating body acts on an operated body 72F, such as a fluid cylinder, adjustment drive, or similar, to adjust the grooving tool 35 in the direction of the active position against the force of the spring assembly 39F, and it is advantageous that this movement is limited by a depth stopper 95F fixed to the guide device 17.

[0174] The grooving unit 31X is substantially equivalent to the grooving unit 31 but has an alternative depth adjustment means 195. While the depth adjustment means 95 provides depth adjustment by an adjuster 93 that supports the operating arm 92, the depth adjustment member 199 is positioned on the operated arm 90, for example, on the operating arm projection 92B that protrudes from the operating arm 92, and is supported by the adjuster 193.

[0175] The depth adjustment member 199 is connected to a threaded portion 199B or has an operating element 199A having a threaded portion 199B. The threaded portion 199B is screwed into the screw housing portion 92C of the operating arm projection 92B. The threaded portion 199B is located on a threaded body 199C, which is screwed into the screw housing portion 92C.

[0176] The screw body 199C is connected to the operating element 199A on one end and accommodates, for example, a pin-shaped or elongated support body 199D on the other end. The free end region of the support body 199D provides an operating surface 192A on which the operated arm 90 can be operated.

[0177] The structure, consisting of two parts, a support column 199D and a threaded body 199C, has the advantage that the support column 199D can be positioned relative to the threaded body 199C and fixed there, for example, by adhesive, in order to calibrate the first depth adjustment position or initial depth adjustment position that the groove-grooving unit 31X should take. This allows for, for example, compensation of manufacturing tolerances. However, it is possible without issue for the depth adjustment member 199 to be a single unit, or for the parts of the depth adjustment member, such as the support column 199D and the threaded body 199C, to be separate parts.

[0178] Preferably, a spring 199E is positioned between the operating element 199A or screw body 199C, which is the head of the depth adjustment member 199, and the operating arm projection 92B. This spring is provided, for example, for locking and / or friction coupling, to fix the depth adjustment member 199 in each adjusted depth adjustment position, for example, by tightening or friction coupling. This prevents or reduces unintended adjustment movements, for example, caused by vibration or similar forces.

[0179] The groove-grooving device depth adjustment means 195 cooperates with the deactivation device 197 and the adjustment body 193. The adjustment body 193, like the adjustment body 93, protrudes laterally from the groove-grooving device support 80. However, unlike the adjustment body 93, the adjustment body 193 is pivotably supported, i.e., pivotably around a pivot axis or adjustment axis SB. The adjustment axis SB corresponds to the longitudinal axis or longitudinal extension of the adjustment body 193.

[0180] For example, the longitudinal end or bearing end 193A of the adjusting body 193, which is formed in the form of a bearing pin, is pivotably supported in a bearing housing 196 that is fixedly positioned on the support 80, i.e., pivotably around the adjusting shaft SB. The bearing housing 196A is formed, for example, in the form of a housing sleeve or housing tube. The bearing housing 196A is provided, for example, on a bearing body 196 that protrudes laterally, particularly perpendicularly, to its longitudinal extension from the grooving device support 80.

[0181] The central portion 193C of the adjuster 193 has an adjuster contour 193D on which the depth adjustment member 199 is supported by the operating surface 192A. The adjuster contour 193D is positioned between the longitudinal end or bearing end 193A and the operating element 193E, for example, a handgrip that protrudes laterally from the adjuster 93 relative to the adjustment shaft SB and can be easily gripped by the operator.

[0182] The adjustment contour 193D has adjustment sections 193G and 193H, which are formed by the eccentric peripheral shape of the adjustment contour 193D with respect to the pivot axis or adjustment axis SB. Adjustment section 193G is assigned to the activation position AK of the deactivation device 197 and protrudes more in front of the adjustment axis SB than adjustment section 193H, which is assigned to the deactivation position DK. Therefore, adjustment section 193H does not deflect the depth adjustment member 199 from the adjustment axis SB as much, and as a result, the operated arm 90 is moved further away from the operator 71 and guide link 74 by the spring force of the spring assembly 94 than when it is in the activation position AK. That is, in this case, the adjustment section 193G, which protrudes more in front of the adjustment axis SB, acts at a position where the operated arm 90 is in contact with the operator 71, deflecting or operating the operated arm 90 in the direction of the operator 71.

[0183] The spring 196E is supported on one hand by a stepped portion of the adjusting body 193, which has an adjusting contour 193D on its outer circumference, and on the other hand by a stepped portion on the outer circumference of the bearing body 196, and thus loads the adjusting body in the sense of friction coupling or locking at the adjusted deactivation position DK or activation position AK, respectively. For example, the spring 196E presses a radial projection or flange projection 193B, which has an adjusting contour 193D on its outer circumference, against the support surface 196B. The support surface 196B is provided, for example, on the motor housing 33A.

[0184] When the saw-driving motor 12 is switched on and off, the creasing device driving motor 32 is periodically switched on and off by switch 60A. However, in the deactivation position DK of the deactivation device 197, the creasing device driving motor 32 is not required. Even when the creasing unit 31 or 31X is in its deactivation position DK and / or its inactive position IP, it is not a problem that the creasing device driving motor 32 is powered. In this case, the creasing tool 35 is driven but does not protrude in front of the guide surface 19 in the sense of biting into the workpiece W and / or is housed in the protective housing 29. However, in this situation, it is advantageous that the creasing device driving motor 32 can be switched off by, for example, switch 32S and / or 32S2. Switch 32S or 32S2 is a component of the control device 32T, which is located, for example, in the motor housing 33A, or is assigned to this control device.

[0185] The motor housing 33A has, for example, a housing or lower portion 33B and a cover 33C, which, when closed, encapsulate or surround the groove-grooving device drive motor 32 and control device 32T, thereby protecting these electrical components from environmental influences.

[0186] Switch 32S or 32S2 comprises, or consists of, a magnetic or other non-contact operating sensor. Switch 32S is located outside the motor housing 33A, for example, on a support 32H, for example, on a circuit board, and communicates with the control device 32T. Switch 32S2, provided in place of or in addition to switch 32S, is housed in a protected manner within the internal space of the motor housing 33A and is, for example, a component of the control device 32T. An operating element 32G, for example, a magnetic sensor or similar, is provided to operate switch 32S or 32S2. The operating element 32G is operable by the adjuster 193. For example, the operating element 32G is housed in a holding housing of the adjuster 193, for example, a pocket. The operating element 32G can also be placed on the adjuster 93 without issue. In either case, the operating element 32G is displaceable axially along, for example, the adjustment axis SA, and / or rotatable about the adjustment axis SA or SB, thereby changing its relative position to the sensor or switch 32S or 32S2. The switch 32S communicates with the control device 32T and transmits the respective positions of the operating element 32G to the control device. Depending on the respective positions of the operating element 32G relative to the switch 32S, the switch or control device 32T switches the groove-cutting device drive motor 32 on or off, i.e., on at the activated position AK of the adjustment body 93 or 193, and off at the deactivated position DK.

[0187] The creasing tool 35 is described below in embodiments 35A, 35B, 35C, and 35D. The aforementioned creasing tools 35 to 35D are entirely general insofar as they have the same components.

[0188] For example, each creasing tool 35 has a blade body 310 having flat surfaces 311 and 312 facing each other. In the case of creasing tools 35A, 35B, 34C, and 35D, creasing tooth arrangements 300A, 300B, 300C, and 300D are arranged on the radial outer circumference of the blade body 310. The creasing tooth arrangements 300A, 300B, 300C, and 300D have different numbers of creasing teeth 301 to 304. For example, tooth arrangement 300A has four teeth, 301, 302, 303, and 304, whereas tooth arrangement 300B has only three teeth, 301, 302, and 303; tooth arrangement 300C has only one tooth, 301; and tooth arrangement 300D has only two teeth, 301 and 302.

[0189] The blade body 310 has a machine housing 315 at its center ZV for detachable attachment to the grooving device tool housing 34 of the saw machine 10.

[0190] When the grooving tool 35 is attached to the saw machine 10, the central axis or rotation axis DV of the grooving tool 35, which is the rotation axis of the grooving device tool housing section 34, simultaneously passes through the center ZV.

[0191] The groove teeth 301-304 protrude in front of the radial outer circumference 313 of the blade body 310 or groove tool 35 at the main cutting edge 350, thereby making the groove teeth available for cutting into the work surface WO of the workpiece W.

[0192] In other words, the grooved teeth 301-304 protrude in front of the radial outer surface 314 of the blade body 310. The outer surface 314 has a substantially cylindrical sheath shape.

[0193] There is a relatively large angular distance between the groove teeth 301-304. For example, in the groove tool 35, an angular distance WA of approximately 90° or exactly 90° is provided between the groove teeth 301-304. In the case of the groove tool 35B, for example, an angular distance WB of 120° is provided between the groove teeth 301-303. The groove tool 35C has only one groove tooth 301, which results in an angular distance of 360°. In the case of groove tooth arrangement 300D, if there are two groove teeth 301 and 302, they are preferably equidistant from each other and have an angular distance WD of 180°.

[0194] It should be noted here that, naturally, different angular distances can be set between the groove teeth. For clarity, for example, in the groove tool 35A, the groove teeth 303 are shown with dashed lines. These groove teeth may, for example, be absent.

[0195] A chip space 316 is provided in front of each groove tooth 301-304. The chip space 316 is made up of recesses 317 in the blade body 310, which are recesses that extend radially inward from the radial outer circumference 313, and are formed in the form of substantially U-shaped or V-shaped recesses. Each recess 317 or each chip space 316 has a bottom 318, from which sides 319 and 320 extend in the direction of the radial outer circumference 313. The sides 319 and 320 are substantially linear. The side 319 faces toward the respective main cutting edges 350 of the groove teeth 301-304, whereas the side 320 of the chip space 316 is located, so to speak, opposite to these main cutting edges 350. An arc-shaped transition portion 321 extends between the side 320 and the radial outer circumference 313 or circumferential surface 314.

[0196] Apart from the chip space 316, the radial outer circumference 313 extends in a circular or annular shape around the central axis of the blade body 310 or the creasing tool 35, i.e., the rotation axis DV. For example, this arc shape extends over an angle of at least 30°, preferably at least 40° or more, with respect to the rotation axis DV, even when four creasing teeth 301-304 are provided, as in the case of the creasing tool 35A.

[0197] Each of the grooved teeth 301-304 has a cutting body 330. Each cutting body 330 is attached to the blade body 310, particularly near the side or side 319, by a mounting portion 331. For example, the side 319 has a stepped portion on which each cutting body 332 is installed. For example, the mounting portion 331 is housed in this type of stepped portion. The mounting portion 331 of the cutting body 332 is supported on the back side of the blade body 310.

[0198] A portion 332 of the cutting body 330 protrudes radially outward with respect to the rotation axis DV in front of the blade body 310. The lateral portion 333 of the cutting body 330 protrudes in front of the flat surfaces 311 and 312. Therefore, portions 332 and 333 are mechanically loaded during the operation of the scoring tool 35, i.e., when the scoring tool cuts into the workpiece W, but are optimally supported by the mounting portion 331. Furthermore, it is advantageous if the cutting body 330 has a radially inward projecting support projection 334 that is also supported by the blade body 310.

[0199] The groove teeth 301-304, and therefore the cutting body 332, have, for example, a main cutting edge 350 that extends parallel to the rotation axis DV or central axis of the groove-grooving tool 35.

[0200] A secondary cutting edge 351 extends laterally from the main cutting edge 350. The secondary cutting edges 351 are, for example, somewhat greater than a right angle to the main cutting edge 350 located between the secondary cutting edges 351, i.e., in an angular range of 90 to 110°. For example, the main cutting edge 350 and each adjacent secondary cutting edge 351 form an angle 354 of a minimum of 90° and a maximum of 110°. In this embodiment, the angular dimension WI of angle 354 is, for example, about 7°.

[0201] The secondary cutting edge 351 extends radially inward with respect to the rotation axis DV, and the radially inward end region 355 has a radial distance RD with respect to the main cutting edge 350. The secondary cutting edge 351, which extends slightly or flatly inclined relative to the flat surfaces 311 and 312, allows for the creation of grooves RI at different depths, and the width of each groove RI increases as the groove-creasing tool 35 penetrates or enters deeper into the workpiece surface WO. In other words, the maximum depth Rmax of the groove RI is basically determined by the radial distance RD.

[0202] However, in this case, for example, if the cutting body 332 or the side portion 352 of the groove teeth 301-304 are also formed as cutting edges, the grooves RI can be made even deeper. The side portion 352 extends, for example, parallel to the central plane of the blade body 310 or perpendicular to the axis of rotation DV.

[0203] The groove RI created by the groove-making tool 35 has a groove base RB, from which a lateral surface RF extends to the workpiece surface WO. The width of the base RB is determined by the main cutting edge 350 or the lateral distance Q1 of the secondary cutting edge 351 in a region the length of the main cutting edge 350.

[0204] The stepped portion 353 is formed between the radially inner end of the side portion 352 and the respective flat surfaces 311 and 312.

[0205] The saw tool 15 includes, for example, a saw blade 15A. The blade body 370 of the saw blade 15A has opposing flat surfaces 371 and 372, and has a saw tooth arrangement 376 including saw teeth 377 on the radial outer circumference 373 with respect to the rotation axis DS on which the saw blade 15A rotates during sawing.

[0206] The number of saw teeth 377 is greater than the number of groove teeth 301-304. Furthermore, the saw teeth 377 have a smaller angular distance with respect to the rotation axis DS on which the saw blade 15A is driven than the angular distance with respect to the rotation axis DV of the groove teeth 301-304.

[0207] The saw tool 15 is designed and formed to saw or cut into the workpiece W from the lower surface WU of the workpiece W. The saw blade 15A has a machine housing 375 through its center ZS, which is passed through by the rotation axis DS or central axis of the saw blade 15A.

[0208] The radial outer circumference 373 has an outer diameter D73 that is, for example, three to four times larger than the outer diameter D13 of the outer circumference 313 of the groove-grooving tool 35.

[0209] The inner diameter D75 of the machine housing 375 of the saw blade 15A is larger than the inner diameter D15 of the machine housing 315 of the grooving tool 35.

[0210] The maximum lateral width of the groove RI in the workpiece surface region can be adjusted by the groove-making tool 35 entering the workpiece surface WO at different depths. The maximum width of the groove RI, i.e., the maximum distance between the lateral sides RF of the groove, is determined by the lateral distance Q2 that the secondary cutting edges 351 have with each other within the range of the maximum radial distance RD. That is, the groove RI can be up to the same width as the lateral distance Q2.

[0211] Such a fit is particularly advantageous because it allows the grooving tool 35 to be associated with different saw tools or saw blades, in which case saw tools with different cutting widths (Schneidbreite) or cut widths (Schnittbreite) (for each length parallel to the rotation axis DS) may be used. The above fit is also advantageous in relation to the manufacturing tolerances or dimensional tolerances of the saw tool or saw blade, and / or when the depth to which the saw blade penetrates the workpiece or similar object differs.

[0212] The creasing tool 35A can be adjusted in relation to its depth of entry into the workpiece W. The creasing device tool housing 34 is a component of the creasing unit 31 having a creasing device drive unit 23A. The creasing device drive unit 32A includes a creasing device drive motor 32 that drives the creasing device tool housing 34 in which the creasing tool 35 is located, either directly or via a transmission device not shown in the schematic diagram. For example, a mounting flange penetrates the machine housing 315. Between the drive motor 32 and the tool housing 34, for example, a stepped transmission (Stufengetriebe) may be provided so that the rotation axis of the tool housing 34 and the motor rotation axis of the drive motor 32 are not aligned in a straight line, and in particular the motor rotation axis of the drive motor 32 is at a greater distance than the drive unit rotation axis DV with respect to the area of ​​the creasing tool 35 intended to enter the workpiece W.

[0213] The sawing tool housing 14, in which the machine housing 375 is located, can be driven by the sawing drive motor 12, for example, directly or via a transmission device not shown in the drawings.

[0214] Similar to the saw unit 11, the slicing unit 31 is movably positioned on the guide device 17, for example, on the guide body 18 of the guide device 17. The guide surface 19 of the guide body is intended to guide along the workpiece surface WO. The sawing tool housing 14 and the slicing tool housing 34 are depth-adjustable with respect to the guide surface 19, thereby protruding more or less in front of the guide surface 19. This allows adjustment of the entry depth of the slicing tool 35 and sawing tool 15 into the workpiece W.

[0215] In this case, the saw tool 15 is adjusted, or adjustable, so that its main cutting edge 380 cuts into the workpiece W from the lower surface WU of the workpiece. In addition, a secondary cutting edge 381 extends alongside the main cutting edge 380 at an angle to it, and these secondary cutting edges create, so to speak, the lateral surface of the saw cut SAE that the saw tool 15 can cut into the workpiece W. In either case, the saw cut SAE has a saw cut width SBB provided, on the one hand by the length of the main cutting edge 380, and on the other hand by the secondary cutting edge 381 which is inclined at an angle to the main cutting edge 380, similar to, for example, a secondary cutting edge 351 relative to the main cutting edge 350.

[0216] Since the saw teeth 377 cut into the workpiece W from the workpiece bottom surface WU and therefore exit the workpiece WO, this carries the risk that the lateral surfaces of the saw cut SAE may be stripped in the area of ​​the workpiece WO. In this case, the scoring tool 35 can be adjusted, or is adjusted, so that the groove RI on the workpiece surface WO has a groove width RBB greater than the saw cut width SBB, with respect to the depth of its entry into the workpiece W or the extent to which the scoring tool 35 protrudes in front of the guide surface 19. The saw tool 15 or saw blade 15A then exits the workpiece W between the lateral surfaces RF of the groove RI on the workpiece surface WO. That is, for example, if a covering or coating, a covering or similar material is placed on the workpiece surface WO, the covering or coating will not be affected (tangieren) or damaged by the saw teeth 377 exiting the workpiece W.

[0217] The inclination of the lateral surface RF has the advantage that the groove RI has a slight step (phase) or bevel (anschraegung) in the region where it transitions to the work surface WO.

[0218] The saw-driving motor 12 has an outer diameter D12, and the grooving device driving motor 32 has an outer diameter D32. With respect to the outer diameter of the grooving tool 35 or saw tool 15 that are driven, the outer diameter D12 of the saw-driving motor 12 is smaller than the outer diameter D32 of the grooving device driving motor 32. Therefore, for example, the ratio of the outer circumference D73 to the outer circumference D12, or the quotient of the outer circumference D73 to the outer circumference D12, is greater than the ratio of the outer circumference D13 to the outer circumference D32, or the quotient of the outer circumference D13 to the outer circumference D32, of the grooving device driving motor 32.

[0219] Using the adjustment means 12B and / or 32B, the rotational speeds of, for example, the sawing tool housing 14 and the grooving device tool housing 34 can be adjusted. The grooving device tool housing 34 can always operate at the same rotational speed, while the rotational speed of the sawing tool housing 14, for example, the rotational speed of the sawing drive motor 12, is adjustable. The grooving device tool housing 34 is configured to be driven, or capable of being driven, at a rotational speed at least twice, preferably three times, or four times that of the sawing tool housing 14.

[0220] Furthermore, the rotational directions VS and VR of the tool housings 14 and 34 are opposite. The tool housing 34 for the grooving tool 35 is driven by a rotational direction VR, which corresponds to, for example, a same-direction rotating saw. Therefore, the rotational direction VR causes the grooving tool 35 to move the sawing machine 10 forward, so to speak, along the workpiece W.

[0221] The rotation direction VS of the sawing tool housing 14 is such that the guide surface 19 applies force in the direction of the workpiece surface WO.

[0222] In the case of the cutting body 330, the secondary cutting edge and the primary cutting edge are straight. However, instead, the primary and secondary cutting edges can be curved, for example, extending in a concave or convex shape, or a combination thereof, or the secondary and / or primary cutting edges can have portions with different inclinations and / or curvatures.

[0223] For example, while the cutting body 330B has a main cutting edge 350 that extends in a straight line, the secondary cutting edge 351B, which is positioned between the main cutting edge 350, has edge portions 360B and 361B. The edge portion 360B extends in a straight line, for example. The edge portion 360B is perpendicular to the main cutting edge 350, for example. In contrast, the portion 361B is flat and inclined diagonally with respect to the portion 360B and has an angle of, for example, 103 to 105° with respect to the main cutting edge 350.

[0224] The cutting body 330C also has a main cutting edge 350, but also a secondary cutting edge 351C which includes portions 360C and 361C. Portion 360C is concave with respect to the central plane MI extending between the flat surfaces 311 and 312 of the blade body 310, but has a smaller curvature than portion 361C.

[0225] To clearly show the convex shape, a cut body 330D is shown in which the secondary cutting edge 351D is concave with respect to the central plane MI.

[0226] Instead of a straight main cutting edge 350, a main cutting edge 350D that extends convexly away from the blade body 310 can be provided.

[0227] Furthermore, it is advantageous when the cutting body or cutting teeth of the scoring tool are symmetrical, so to speak, that is, when the cutting edges are formed on opposite sides, and therefore in the regions of each flat surface 311, 312. However, it is also possible for the cutting teeth or cutting body to have the cutting edge on only one of the flat surfaces 311 or 312. This is schematically shown in the cutting body 330B. For example, in the cutting body 330B, instead of the secondary cutting edge 351B on the right side of the drawing, a side surface 359 that does not protrude in front of the flat surface 311 can be provided, and instead of the secondary cutting edge 351B on the left side of the drawing, a side surface 359 that does not protrude in front of the flat surface 312 can be provided on the cutting body 330B that is trailing or preceding the blade body 310 or scoring tool 35 in the circumferential direction.

Claims

1. A portable handheld saw machine comprising a saw unit (11) having a sawing tool holder (14) for a saw tool (15), in particular a saw blade, and a sawing drive motor (12) for driving the sawing tool holder (14), and a guide device (17), wherein the guide device comprises a guide body (18) having a guide surface (19) extending along a longitudinal axis (L) for guiding the handheld saw machine (10) along a working direction (AR) on a workpiece (W) or a guide rail (200), and wherein the saw unit (11) has a sawing tool holder (14) for a sawing tool (15), in particular a saw blade, and a guide device (17). The hand-held saw machine is capable of making saw cuts (SAE) in the workpiece (W) along the working direction (AR) using the saw tool (15) that protrudes in front of the guide surface (19), and the hand-held saw machine has a safety device (100) for safely fixing the sawing tool holder (14) for tool change of the saw tool (15), the safety device (100) safely fixing the sawing tool holder (14) so ​​that it is not driven by the sawing drive motor (12) in a safety position (SG) and in a sawing operating position ( The portable hand-held saw (10) is provided with a creasing unit (31) having a creasing tool holder (34) for a creasing tool (35), in particular a creasing tool saw blade, and a creasing tool drive (32A), in particular a creasing tool drive motor (32), arranged on the guide device (17) in front of the saw unit (11) with respect to the working direction (AR), and the creasing tool drive of the hand-held machine tool is a creasing tool (35) protruding in front of the guide surface (19) during operation to cut a creasing mark (RI) in the workpiece (W) that is positioned in front of the saw cut (SAE) to be made in the working direction (AR); and a safety device (100) safely fixes the creasing device tool storage (34) so ​​that it is not driven by the creasing device drive device (32A) in the safety position (SG) and releases it in the saw operating position (FS).

2. 2. The handheld saw of claim 1, wherein the creasing unit (31) has a creasing device drive motor (32) separate from the sawing drive motor (12), and the safety device (100) in the safety position (SG) simultaneously cuts off the power supply to the sawing drive motor (12) and the creasing device drive motor (32).

3. 3. The handheld saw according to claim 1, wherein the saw unit is provided with a switch for switching the sawing drive motor on and off, and the creasing device drive motor can be switched on and off by the switch; and the safety device has a switch-off member for blocking the switch so that it cannot be switched on in the safety position, and the switch-off member, in the blocking position, blocks operation of the switch in the direction of a switch-on position intended for energizing the sawing drive motor and the creasing device drive motor.

4. 4. The hand saw according to claim 1, further comprising a blocking device (85, 130) having a sawing blocking element (131) for immovably blocking the sawing tool receptacle (14) and / or a creasing device blocking element (85A) for immovably blocking the creasing device tool receptacle (34), wherein in a blocking position the respective blocking element positively engages with a blocking contour fixedly connected to the sawing tool receptacle (14) or the creasing device tool receptacle (34), and in a release position releases the sawing tool receptacle (14) or the creasing device tool receptacle (34) for movement.

5. 5. A hand saw according to claim 4, characterized in that the safety device (100) has an operating element (101) for simultaneously operating the sawing blocking element (131) and / or the creasing device blocking element (85A) to the blocking position and the switch-off element (105) to the disconnecting position.

6. 6. A hand saw according to claim 4 or 5, characterized in that the sawing block (131) and / or the creasing device block (85A) are provided for manual operation by an operator and have an operating contour separate from the safety device (100).

7. The sawing tool holder (14), in particular the entire saw unit (11), is movably supported by or relative to the guide device (17) using a sawing depth adjustment bearing (16) between an upper depth adjustment position (OT) and at least one lower depth adjustment position (UT) in which the sawing tool holder (14) is adjusted closer to the guide surface (19) than in the upper depth adjustment position (OT), so that the saw tool (15) protrudes in front of the guide surface (19) more in the lower depth adjustment position than in the upper depth adjustment position (OT).

7. The hand saw according to claim 1, further comprising a sawing depth adjustment device (62) for adjusting a depth adjustment position that forms a tool change depth adjustment position (WT) among the lower depth adjustment positions (UT) of the sawing tool storage section (14) and allows free access to the tool storage section for tool change of the saw tool (15), and wherein the safety device (100) is configured to operate the sawing depth adjustment device (62) for adjusting the tool change depth adjustment position (WT).

8. 8. A handheld saw according to claim 7, characterized in that the sawing depth adjustment device (62) has a locking device (120) for locking the sawing tool holder (14), in particular the entire saw unit (11), in the tool change depth adjustment position (WT).

9. 9. The hand saw according to claim 8, wherein the safety device (100) is configured to activate the locking device (120) for locking the sawing tool holder (14) in the tool change depth adjustment position (WT).

10. The hand saw according to any one of claims 1 to 9, characterized in that the hand saw comprises a depth locking device (61) for locking the sawing tool holder (14), in particular the entire saw unit (11), in the upper depth adjustment position (OT), and the safety device (100) comprises an operating element (101) for operating the depth locking device (61) to release the sawing tool holder (14) so ​​as to move it to the tool change depth adjustment position (WT) when the safety device (100) is adjusted to the safety position (SG).

11. 11. The hand saw according to claim 1, wherein the creasing device tool receptacle (34), in particular the entire creasing unit (31), is supported on or relative to the guide device (17) by means of a creasing device depth adjustment bearing (36) separate from the sawing depth adjustment bearing (16) so as to be movable between at least one active position (AP) in which the creasing tool (35) arranged in the creasing device tool receptacle (34) projects in front of the guide surface (19) and an inactive position (IP) in which the creasing tool (35) retracts behind the guide surface (19); and wherein the safety device (100) is configured to operate the creasing device tool receptacle (34) into a tool change position corresponding to at least one of the inactive position (IP) or the active position (AP), allowing free access to the tool receptacle for tool change of the creasing tool (35).

12. 12. The hand saw according to claim 11, wherein the hand saw has a driving device (70) by which the creasing device tool holder (34) is driven and adjusted to the tool change position (WT) when the sawing tool holder (14) is moved to the tool change depth adjustment position (WT).

13. 13. The hand saw according to claim 1, further comprising at least one protective housing (29), in particular a protective hood, for the saw tool (15) and / or the creasing tool (35) to accommodate the parts of the saw tool (15) or the creasing tool (35), respectively, that do not protrude in front of the guide surface (19) in the direction of the workpiece (W) to be processed.

14. 14. A hand saw according to claim 13, characterized in that the at least one protective housing (29), in particular the cover (41) of the at least one protective housing (29), has at least one cavity (58, 59), in particular a window, through which the sawing tool receptacle (14) and / or the creasing device tool receptacle (34) is accessible for mounting and removing the saw tool (15) or creasing tool (35) in the or one tool change position intended for tool changing in the respective tool receptacle.

15. 15. A hand saw according to claim 13 or 14, characterized in that the saw tool (15) projects in front of the at least one protective housing (29) more than the creasing tool (35) in the or one tool change position intended for tool change of the saw tool (15) or the creasing tool (35).

16. 16. A hand saw according to claim 15, characterized in that in the or one tool change position intended for tool change, the creasing tool (35) does not freely project, in front of the at least one protective housing (29), more than when it is in a maximum adjustable active position (AP) corresponding to a maximum adjustable penetration depth of the creasing tool (35) into the workpiece (W) and / or projects freely less than is necessary to cut the finger of an adult operator and / or projects freely by less than 8 mm, preferably a maximum of 7 mm.

17. A handheld saw according to any one of claims 1 to 16, characterized in that the safety device (100) has a motor drive (101A) for adjusting the safety device (100) between the saw operating position (FS) and the safety position (SG).

Images