Motor saw and method for producing a cut in a workpiece using a motor saw

Abstract

The motor saw includes a housing; a guide rail at which the saw chain is guided; and the driving motor is used for driving the saw chain. The motor saw has a transverse direction which runs perpendicular to the plane of the guide rail. The motor saw has a first longitudinal side and an opposing second longitudinal side. The motor saw expands a saw chain space when the guide rail is surrounded, and the saw chain space is bounded by an imaginary circumferential line when viewed along the transverse direction of the motor saw. The motor saw has at least one marking on the second longitudinal side thereof, the at least one marking being positioned on the housing in such a way that, when viewed in the transverse direction towards the second longitudinal side, the circumferential line at the widest point of the guide rail is at a distance of no more than 2 cm from the extension of the marking, or alternatively, the circumferential line at the widest point of the guide rail is at a distance of no more than 2 cm from the extension of the marking. The motor saw has a first marking and a second marking on the second longitudinal side thereof, the two marking being positioned on the housing in such a way that the two marking have a distance of at least 40 mm relative to each other at any location.

Description

Technical Field

[0001] The invention relates to a motor saw and a method for producing an undercut in a workpiece using a motor saw. Background Art

[0002] When working with a motor saw, especially the felling of trees presents challenges to the operator. The orientation and depth of the cut that can be performed with a motor saw has a huge impact on whether the tree can fall in a controlled manner in the desired direction.

[0003] A display device is known from DE 10 2010 008 102 A1, which, when carrying out an undercut, produces a mark on the ground which indicates the direction in which the tree will fall. Summary of the invention

[0004] The object of the present invention is to provide a motor saw of the generic type which simplifies work with the motor saw and to specify a method for producing an incision in a workpiece with the motor saw.

[0005] The object is achieved by a motor saw with a housing having a guide bar on which a saw chain is guided, and a drive motor which is designed to drive the saw chain in a circular motion during operation, wherein the motor saw has a transverse direction which runs perpendicular to the plane of the guide bar, wherein the housing of the motor saw has a first longitudinal side and an opposite second longitudinal side, wherein the longitudinal sides delimit the housing of the motor saw in the transverse direction, wherein the saw chain opens a saw chain space when it is wrapped around the guide bar, wherein the saw chain space is delimited by an imaginary circumferential line when viewed in the transverse direction of the motor saw, characterised in that the motor saw has at least one marking on its second longitudinal side, wherein the at least one marking is positioned on the housing in such a way that, when viewed in the transverse direction towards the second longitudinal side, the circumferential line has a minimum distance of no more than 2 cm or no distance from an imaginary straight line running along the marking.

[0006] With regard to the method, the object is achieved by a method for producing an incision in a workpiece using a motor saw, wherein the motor saw has a housing, a guide bar on which a saw chain is guided, and a drive motor, which is designed to drive the saw chain in a circular motion during operation, wherein the motor saw has a transverse direction which runs perpendicular to the plane of the guide bar, wherein the housing of the motor saw has a first longitudinal side and an opposite second longitudinal side, wherein the longitudinal side delimits the housing of the motor saw in the transverse direction, and wherein the saw chain is driven in a circular motion when it is driven in a circular motion around the guide bar. Expanding a saw chain space, wherein the saw chain space is bounded by an imaginary circumferential line when viewed in a transverse direction of the motor saw, wherein the motor saw has at least one marking on its second longitudinal side, wherein the at least one marking is positioned on the housing in such a way that, when viewed in a transverse direction toward the second longitudinal side, the circumferential line has a minimum distance of no more than 2 cm or no distance to an imaginary straight line extending along the marking, wherein the saw chain is moved into the workpiece until at least one imaginary straight line reaches the desired position of the bottom of the cut-in portion.

[0007] The motor saw has a first longitudinal side and an opposite second longitudinal side. It is provided that the motor saw has at least one marking on its second longitudinal side. The at least one marking is positioned on the housing such that when viewing in a transverse direction toward the second longitudinal side, the circumference line has a minimum distance of no more than 2 cm or no distance from an imaginary straight line extending along the marking.

[0008] The markings show the operator the position of the saw chain at the top and / or bottom of the guide rail even when the saw chain cannot be seen by the operator, i.e., for example, when it is in a cut. In particular, the markings can show the operator the position of the tooth tips of the saw chain. The markings show the cutting depth during the cutting process. When felling a tree trunk, the operator must make both the felling notch and the felling cut at the correct depth so that the breaking strip has the desired width. Due to the markings, the operator can easily produce the felling notch and / or the felling cut at the desired depth. The production of window sections during the construction of wooden houses is also simplified by the at least one marking.

[0009] In particular, the at least one marking is positioned on the housing such that, when viewed in a transverse direction toward the second longitudinal side, the circumferential line has a minimum distance or no distance from the imaginary straight line in a region of the circumferential line in which the saw chain moves in the saw chain space in the direction of the housing.

[0010] If a tree trunk lying on the ground is cut in the forest, the marking shows the position of the saw chain relative to the forest floor. This prevents the saw chain from blunting itself in the forest floor, which would cause the saw chain to become blunt quickly. This makes work with a motor saw easier for the operator. The operator orients the saw chain in the cut using the at least one marking.

[0011] In particular, the at least one marking comprises a first marking and a second marking. In particular, the two markings are positioned on the housing such that, when viewed in a transverse direction toward the second longitudinal side, the circumference has a minimum distance of no more than 2 centimeters or no distance from an imaginary first straight line extending along the first marking, and has a minimum distance of no more than 2 centimeters or no distance from an imaginary second straight line extending along the second marking. In particular, an operator can orient the position of the saw chain in the cut using the first marking and the second marking.

[0012] When viewing in the transverse direction toward the second longitudinal side, the distance between the imaginary first straight line and the circumference line, in particular at the widest part of the guide rail, does not exceed 2 cm, in particular does not exceed 1 cm, in particular does not exceed 0.5 cm, wherein the distance can also be 0 cm. When viewing in the transverse direction toward the second longitudinal side, the distance between the imaginary second straight line and the circumference line, in particular at the widest part of the guide rail, does not exceed 2 cm, in particular does not exceed 1 cm, in particular does not exceed 0.5 cm, wherein the distance can also be 0 cm.

[0013] The distance between the imaginary first straight line and the circumferential line and the distance between the imaginary second straight line and the circumferential line are measured in particular on two sides of the guide rail that are located opposite each other.

[0014] In particular, the minimum distance between the imaginary straight line and the circumferential line at the respectively associated side of the guide rail is as small as possible, particularly preferably zero.

[0015] In particular, a first mark and a second mark are provided on the longitudinal side of the motor saw. These marks are positioned on the housing in such a way that an imaginary straight line extending along the marks extends close to the circumference of the saw chain space.

[0016] When viewing in the transverse direction towards the second longitudinal side, the circumferential line has a first minimum distance of no more than 2 cm, in particular no more than 1 cm, in particular no more than 0.5 cm, from the imaginary first straight line, in particular there is no distance between the circumferential line and the imaginary first straight line. When viewing in the transverse direction towards the second longitudinal side, the circumferential line has a second minimum distance of no more than 2 cm, in particular no more than 1 cm, in particular no more than 0.5 cm, from the imaginary second straight line, in particular there is no distance between the circumferential line and the imaginary second straight line. In a particularly preferred embodiment, the first and / or second minimum distance can be 0 cm.

[0017] The at least one marking is in particular designed to be elongated, for example as a line. When viewing in the transverse direction, an imaginary straight line extends in particular in the longitudinal direction of the marking and through the marking in the middle. The marking is in particular formed by a straight line. If a plurality of markings are provided, each marking is in particular formed by a straight line. It may also be advantageous if at least one, in particular all, of the markings are designed differently, for example by means of a broken line, a wavy line, a row of triangles, dots or other graphic designs. The at least one marking may be colored and / or distinct relative to the contour of the housing so as to be clearly visible to the operator. It may be provided that the at least one marking is formed by an imaged section of the saw chain. The imaged portion may be highlighted in color and / or formed by a raised portion and / or a recessed portion. A section of the saw chain may also be imaged as a symbol next to the marking.

[0018] Alternatively or additionally, it is provided that the motor saw has a first marking and a second marking on its second longitudinal side, wherein the two markings are positioned on the housing in such a way that the two markings are at any location at a distance of at least 40 mm from each other. Two markings spaced apart from each other enable an estimation of the position of the guide rail even if at least one marking has a minimum distance of no more than 2 cm from a straight line extending along the marking. In particular, the two markings have approximately the same distance from a straight line extending along the marking and / or are offset in the same direction relative to the straight line. The direction of the offset and the size of the distance can in particular take into account the viewing direction of the operator in at least one common use of the motor saw.

[0019] In particular, the distance between the markings is at least 45 mm, in particular at least 50 mm.

[0020] In particular, the distance between the markings is at most 150 millimeters.

[0021] In order to allow a good estimation of the position of the cut produced by the saw chain over the entire length of the guide rail, it is provided that at least one of the markings, in particular both markings, when viewed in the transverse direction, encloses an angle of less than 5°, in particular less than 2°, in particular less than 1° with the longitudinal center axis of the guide rail. The longitudinal center axis runs in the longitudinal direction of the guide rail between the longitudinal side and the flat side of the guide rail. The longitudinal center axis runs in the plane of the guide rail. It is particularly preferred that, within the scope of manufacturing accuracy, at least one of the markings is oriented parallel to the longitudinal center axis of the guide rail.

[0022] The viewing direction along the transverse direction may also be referred to as a viewing direction toward the longitudinal side or a viewing direction toward the side, in particular a viewing direction toward the longitudinal side or a side of the motor saw.

[0023] In particular, when viewing along the transverse direction, the first marking and the second marking enclose an angle of less than 5°, in particular less than 2°, in particular less than 1°. In particular, the first marking and the second marking extend parallel to each other when viewing along the transverse direction.

[0024] In particular, the guide rail extends closer to the first longitudinal side than to the second longitudinal side of the motor saw. The second longitudinal side of the motor saw, which has the two markings, is in particular the longitudinal side of the motor saw that is remote from the guide rail. When performing a felling cut, the motor saw is usually held in such a way that the guide rail can be arranged close to the ground. The longitudinal side adjacent to the guide rail points downwards towards the ground. The markings are in particular arranged at the opposite longitudinal sides of the motor saw. The markings are in particular arranged at the longitudinal side of the motor saw that points upwards when performing a felling cut or when performing a cut close to the ground. The markings are in particular arranged at the longitudinal side of the motor saw that is further away from the ground when performing a felling cut or when performing a cut close to the ground.

[0025] In an alternative embodiment, the longitudinal side of the motor saw with at least one marking is the longitudinal side of the motor saw close to the guide rail. The at least one marking, in particular at least two markings, are in particular arranged on the sprocket cover. In particular, the motor saw has at least one marking on each longitudinal side, in particular at least two markings on each longitudinal side.

[0026] In particular, the motor saw has a grid with openings on the second longitudinal side. The openings of the grid and the grid bridges located between the openings expand the suction area. In particular, the motor saw is driven by an internal combustion engine and the working air is sucked in through the suction area for the internal combustion engine. In an alternative embodiment, the motor saw is driven by an electric motor. In particular, the motor saw is supplied with energy by a rechargeable battery. It can be provided that cooling air is sucked in via the suction area for the drive motor, i.e. for the internal combustion engine or for the electric motor.

[0027] In particular, at least one of the markings extends at least partially in the suction area. In particular, it is provided that at least one of the markings extends at least partially on the grid bridge of the grid. As a result, the marking is visually particularly easy to perceive for the operator. At the same time, an attractive appearance of the motor saw is produced. Alternatively, it can be provided that at least one marking extends at least partially, in particular completely, outside the suction area. This is particularly advantageous if the orientation of the grid bridge of the grid and / or the position of the grid do not coincide or do not coincide precisely with the orientation of the longitudinal center axis of the guide bar and the position of the circumference of the saw chain space.

[0028] In particular, at least one marking is formed by a line that stands out in color. Such a marking can be applied in a simple manner. For example, a line can be applied to the housing. In particular, the marking is at least partially implemented in a color that forms a color contrast with the surrounding color of the housing.

[0029] In another alternative design, it is alternatively or additionally provided that the first marking and / or the second marking is made of a material different from that of the housing. For example, a two-component injection molding method can be provided to produce the housing.

[0030] Alternatively or additionally, it is preferably provided that at least one mark is at least partially, in particular completely, formed by a protruding rib. This improves the recognizability of the mark. Even in the event of scratches or other damage to the motor saw, visibility is further ensured by the design at the protruding rib. Alternatively, the mark can also be at least partially, in particular completely, formed by a recessed portion. The rib and / or recessed portion is in particular arranged at the housing or at a component fastened to the housing.

[0031] In particular, the first mark and / or the second mark can be formed by at least partially protruding ribs. Alternatively, the first mark and / or the second mark can be constructed by at least partially recessed portions. In another alternative design, the rib and / or the recessed portion are arranged at the housing or at a component fastened to the housing.

[0032] In particular, the end side of the rib is additionally highlighted in color. In particular, the rib is designed in such a way that the operator can simply use a commercially available pen to improve the highlighting in color or to re-produce the highlighting in color. Alternatively or additionally, it can be provided that at least one longitudinal side of the rib can also be highlighted in color. If both the end side of the rib and at least one longitudinal side of the rib are highlighted in color, visibility is improved in particular when the rib is viewed at an angle, so that the at least one mark can be clearly seen even under unfavorable light conditions. If the mark is formed by a recess in the housing, a highlight in color can be provided in addition. By applying a line that is highlighted in color at the recess, the mark is largely prevented from being damaged by scratches or the like at the housing.

[0033] It can be provided that at least one mark is constructed on a separate marking component fastened to the housing. By designing the mark on a separate marking component fastened to the housing, it is also possible to retrofit the mark on an existing motor saw. In particular, the marking component is detachably held on the housing. By being constructed on a separate marking component, it is possible to easily replace the marking component when the mark is damaged when it is detachably fastened to the housing. The marking component is preferably a component that is not necessary for the stability of the housing and is only used to indicate the cutting depth by means of a mark. The stability of the housing is in particular the rigidity and / or strength of the housing. The separate marking component can be fixed to the housing, for example by a snap-in connection, magnetic fastening or other fixing means.

[0034] In particular, the motor saw carries a further marking on the second longitudinal side, which is inclined at an angle of less than 10° to the height direction of the motor saw. When a felling cut is made, the further marking indicates the felling direction.

[0035] In particular, the motor saw carries a further marking on the second longitudinal side, wherein an imaginary further straight line extending along the further marking has a distance of no more than 10 mm relative to the longitudinal center axis of the guide rail at any point of the guide rail when viewed in the transverse direction. The further marking preferably extends parallel to the longitudinal center axis. The further marking allows an estimation of the direction during penetration. The further marking encloses an angle of less than 5°, in particular less than 2°, in particular less than 1° with the longitudinal center axis.

[0036] In the method for producing an undercut in a workpiece using a motor saw, it is provided that the saw chain is moved into the workpiece until the imaginary first straight line and / or the imaginary second straight line reaches the desired position of the bottom of the undercut. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The following is an explanation of the embodiments of the present invention based on the accompanying drawings.

[0038] Figure 1 and Figure 2 A perspective view showing a first embodiment of a motor saw;

[0039] Figure 3 Display Utilization Figure 1 and Figure 2 Schematic diagram of a motor saw making a felling cut;

[0040] Figure 4 A top view showing another embodiment of a motor saw;

[0041] Figure 5 and Figure 6 A partial side view showing an embodiment of a motor saw;

[0042] Figure 7A perspective view showing another embodiment of a motor saw;

[0043] Figure 8 show Figure 7 An enlarged view of section VIII in FIG.

[0044] Fig. 9 Display for Figure 7 The implementation variant of the motor saw in Figure 8 The corresponding diagram;

[0045] Fig.10 A partial perspective view showing another embodiment of a motor saw;

[0046] Fig.11 show Fig.10 A partial enlarged perspective view of a motor saw;

[0047] Fig.12 show Fig.10 The motor saw in the motor saw Fig.11 Exploded view of the area shown in ;

[0048] Fig.13 Show in enlarged perspective Figures 10 to 12 Marking parts of the motor saw;

[0049] Fig.14 Another embodiment of a motor saw is shown. DETAILED DESCRIPTION

[0050] Figure 1 The motor saw 1 is shown in a perspective view. The motor saw 1 is a hand-guided, hand-portable working tool. During operation, the motor saw 1 is carried and guided by an operator. The motor saw 1 is configured to be freely moved in space by the operator during operation, so that the motor saw 1 can perform cutting in all spatial directions.

[0051] The motor saw 1 has a housing 2. The housing 2 is formed by a plurality of housing parts, which are connected to each other in a fixed or relatively movable manner (for example, by a vibration-proofing element). The housing 2 can be constructed in a closed manner. However, it can also be arranged that the housing 2 is partially open to the surrounding environment, in particular to allow the housing parts to move relative to each other during operation. The drive motor 9 is arranged in the housing 2. The parts of the housing 2 can also form housing parts of the drive motor 9. A handle for guiding and carrying the motor saw 1 during operation is arranged at the housing 2. In an embodiment, a rear handle 3 and a handle tube 4 are arranged at the housing 2 of the motor saw 1. Operating elements 6 and 7 are arranged at the rear handle 3. In an embodiment, the operating element 6 is a throttle lever, and the operating element 7 is a throttle lever lock. In an embodiment, the drive motor 9 is an internal combustion engine. A starter handle 8 for starting the drive motor 9 extends from the housing 2.

[0052] The motor saw 1 has a guide rail 10 on which a saw chain 11 is arranged circumferentially. During operation, the saw chain 11 is driven circumferentially around the guide rail 10 by the drive motor 9. During operation, the saw chain 11 moves in a saw chain space 35. The saw chain space 35 corresponds approximately to the space that the saw chain 11 empties in the tree trunk during operation. The saw chain 11 opens the saw chain space 35. In a plane 37 ( Figure 4 ), the saw chain space 35 is delimited at its outer circumference by an imaginary circumferential line 36, which is Figure 1 Draw with dotted lines.

[0053] The guide rail 10 has a longitudinal center axis 12. The guide rail 10 is flat and usually has a groove at its circumference, into which the saw chain 11 extends. In particular, the drive links of the saw chain 11 extend into the guide rail 10. The guide rail 10 has a free end 38 that is remote from the housing 2 of the motor saw 1. The longitudinal center axis 12 extends in the center of the guide rail 10 and in the longitudinal direction of the guide rail 10. The guide rail 10 has longitudinal sides that are opposite to each other, namely an upper side 41 and a lower side 42. The longitudinal center axis 12 extends centrally between the upper side 41 and the lower side 42 of the guide rail 10.

[0054] During operation, the saw chain 11 is driven in a running direction 57. At the upper side 41 of the guide bar 10, the running direction 57 points away from the housing 2. At the lower side 42 of the guide bar 10, the running direction 57 points toward the housing 2.

[0055] The hand guard 5 extends on the side of the handle tube 4 facing the guide rail 10. The hand guard 5 can be designed to trigger a brake (not shown) for the saw chain 11.

[0056] The motor saw 1 has a longitudinal direction x. The longitudinal direction x runs parallel to the longitudinal center axis 12 of the guide rail 10. The longitudinal direction x can also be called the guide rail direction. Figure 1 In the side view shown in , the longitudinal direction x of the motor saw 1 coincides with the longitudinal center axis 12 of the guide rail 10. The motor saw 1 has a height direction z, which is perpendicular to the longitudinal direction x. The motor saw 1 has a parking position 20. In the parking position 20, the motor saw 1 is parked on a flat, horizontal parking surface 19. Figure 1 , the parking surface 19 is schematically shown. In the parking position 20, the handle tube 4 overlaps the housing 2 at a distance, and the rear handle 3 points upward, so that the motor saw 1 can be easily gripped by the operator in the parking position 20. In the parking position 20, the height direction z encloses an angle α with the vertical line V, which is preferably less than 10°. In particular, the housing 2 includes a handle housing 54 and a motor housing 55, which are connected to each other via at least one anti-vibration element.

[0057] Figure 2The motor saw 1 is shown in another orientation. Figure 2 The illustration of the motor saw 1 in FIG. 1 corresponds approximately to the viewing direction that an operator may have of the motor saw 1 when performing a felling cut. Figure 2 As shown, the motor saw 1 has two elongated markings 21 and 22. The markings 21 and 22 are arranged as elongated lines on the housing 2 and, in the embodiment, stand out in color compared to the housing 2. As a result, the markings 21 and 22 are easily recognizable to the operator. An imaginary first straight line 25 extends adjacent to the upper side 41 of the guide rail 10. The imaginary first straight line 25 extends along the first marking 21. An imaginary second straight line 26 extends adjacent to the lower side 42 of the guide rail 10. The imaginary second straight line 26 extends along the second marking 22.

[0058] The markings 21 and 22 have a distance e relative to each other. The distance e is measured in particular in the viewing direction along the transverse direction y of the motor saw 1. At each location of the markings 21 and 22, the distance e is in particular at least 40 mm, in particular at least 45 mm, in particular at least 50 mm. The distance e is in particular less than 150 mm.

[0059] In an advantageous alternative design, it can be provided that the motor saw 1 has only one of the markings 21 or 22, in particular only the second marking 22. The marking 21 or the marking 22 in particular indicates the cutting depth to the operator. If two markings 21 and 22 are provided, the position of the guide rail 10 is additionally indicated to the operator. This is advantageous, for example, when performing a piercing cut.

[0060] The saw chain 11 has cutting teeth 44, each of which has a tip 43. The imaginary straight lines 25 and 26 extend, in particular, at least at the widest part of the guide bar 10 approximately at the height of the tip 43 of the cutting teeth 44 of the saw chain 11. The imaginary straight lines 25 and 26 thus represent the positions of the cuts that can be produced by the motor 12. The imaginary first straight line 25 represents the position of the cut when the cutting is guided in the direction of the arrow 45. The imaginary second straight line 26 represents the position of the cut when the cutting is guided in the direction of the arrow 46. The arrow 45 points from the lower side 42 of the guide bar 10 to the upper side 41 of the guide bar 10. The arrow 46 points from the upper side 41 of the guide bar 10 to the lower side 42 of the guide bar 10.

[0061] In particular, the housing 2 can have a housing cover 15. If the drive motor 9 is an internal combustion engine, the housing cover 15 can be, for example, a fan cover and covers the space in which the fan wheel of the drive motor 9 is arranged. The housing cover 15 can also be another cover of the housing. Figure 2In the embodiment of the present invention, two markings 21 and 22 are provided on the housing cover 15. The housing cover 15 has a grid 16, whose grid bridges 29 separate a plurality of openings 17 from one another. The grid bridges 29 of the grid 16 and the openings 17 delimit the suction region 18. In the present embodiment, the first marking 21 is located outside the suction region 18, in particular at a small distance from the suction region 18. The second marking 22 extends at least partially, in particular completely, through the suction region 18.

[0062] Figure 3 The arrangement of the motor saw 1 is schematically shown when a felling cut 47 is made in a tree trunk 28. The felling cut 48 comprises a felling cut bottom 49 and a felling cut top 50. When making the felling cut bottom 49 and the felling cut top 50, the motor saw 1 moves in the direction of the arrow 46 ( Figure 2 ). When making the felling cut 47, the motor saw moves in the direction of the arrow 45. The position of the felling chord (where the felling top 50 and the felling bottom 49 meet) is indicated to the operator by the second marking 22 when sawing the felling top 50 and the felling bottom 49. Figure 3 In the embodiment shown, the felling mouthpiece is hidden by the motor saw 1 and therefore cannot be seen. Figure 3 In the figure, an imaginary first straight line 25 of the first marking 21 is drawn, which shows the operator how deep the felling cut 47 has been carried out. The operator can thus easily estimate whether the breaking strip has reached the desired width. In particular, the desired width corresponds to the desired cutting depth.

[0063] like Figure 3 As shown, the motor saw 1 has a first longitudinal side 13, which is Figure 3 The motor saw 1 has an opposite second longitudinal side 14 which is located when the motor saw 1 is in the position shown in FIG. Figure 3 The orientation shown in the figure points upward. Figure 3 In FIG. 5 , a possible position of the bottom 56 is schematically indicated by a dashed line. The second longitudinal side 14 is the longitudinal side of the motor saw 1 which is remote from the bottom 56 .

[0064] exist Figure 4 In the following, the positions of the longitudinal sides 13 and 14 are explained according to another embodiment of the motor saw 1 . Figure 4 The motor saw 1 shown in FIG. 1 is driven by a drive motor 9 which is configured as an electric motor. Figure 4 The reference numerals 21 and 22 cannot be seen in the top view in FIG. The battery 40 is used to supply energy to the drive motor 9. The battery 40 is held in the housing 2 in particular. Figure 4The guide rail 10 schematically shown in the figure is arranged adjacent to the first longitudinal side 13 of the motor saw 1. The motor saw 1 has a transverse direction y. The transverse direction y is perpendicular to the longitudinal direction x and perpendicular to the height direction z. A position perpendicular to a direction is referred to as a position orthogonal to a direction. The transverse direction y runs parallel to the axis of rotation of the output shaft of the drive motor 9. The transverse direction y is parallel to the drive axis of the drive pinion driving the saw chain 11. This also applies accordingly to the embodiment with an internal combustion engine.

[0065] When viewing in the transverse direction y, imaginary straight lines 25 and 26 extend in particular in the longitudinal direction of the markings 21 and 22 and centrally through the markings 21 and 22. The imaginary straight lines 25 and 26 extend in particular in extension of the markings 21 and 22, in particular in the direction of the guide bar 10 and the saw chain 11.

[0066] The guide rail 10 is fastened to the housing 2. For this purpose, the guide rail 10 is in particular held in a clamped manner by the sprocket cover 39. In the present exemplary embodiment, a portion of the first longitudinal side 13 is formed by the sprocket cover 39. The first longitudinal side 13 is the area of ​​the motor saw 1 that is visible when viewing in a direction parallel to the transverse direction y toward the side of the motor saw 1 adjacent to the guide rail 10. The opposite longitudinal side 14 is the area of ​​the motor saw 1 that is visible when viewing in an opposite direction, also parallel to the transverse direction y. The longitudinal sides 13 and 14 delimit the motor saw 1 in the transverse direction y. The guide rail 10 has a plane 37 in which the guide rail 10 extends. The guide rail 10 is designed to be flat. In Figure 4 In the top view shown in , the plane 37 coincides with the longitudinal center axis 12 of the guide rail 10 .

[0067] In implementation Figure 3 When the cutouts 47, 49 and 50 are shown in FIG. 1 , the first longitudinal side 13 points downwards and the second longitudinal side 14 points upwards. The markings 21 and 22 are applied on the second longitudinal side 14 so that they can be clearly seen by the operator.

[0068] Figure 5 Another embodiment of the motor saw 1 is shown. Figure 5 , the positions of the imaginary straight lines 25 and 26 are plotted. When viewing in the transverse direction y, the saw chain space 35 is bounded by a circumferential line 36. The guide bar 10 has a width c, which is measured perpendicularly to the longitudinal center axis 12 and parallel to a plane 37 of the guide bar 10. The guide bar 10 is of a slightly curved design, in particular at its upper side 41 and at its lower side 42. The guide bar 10 has a region where the width c is the largest. This region is at Figure 51 and 2. The distance a is indicated by a dashed line 34 extending perpendicularly to the longitudinal center axis 12. At this line 34, the imaginary first straight line 25 adjacent to the upper side 41 of the guide rail 10 has a minimum distance a from the circumference line 36. In particular, the minimum distance a is approximately zero. The distance a is less than 2 cm, in particular less than 1 cm, and in particular less than 0.5 cm. The minimum distance a is the minimum distance between the imaginary first straight line 25 at the upper side 41 and the circumference line 36. In an alternative embodiment, it can be provided that the minimum distance a is not measured at the widest part of the guide rail 10.

[0069] Adjacent to the underside 42 of the guide rail 10, the imaginary second straight line 26 has a minimum distance b from the circumferential line 36. In particular, the minimum distance b is approximately zero. The minimum distance b is in particular less than 2 cm, in particular less than 1 cm, and in particular less than 0.5 cm. The minimum distance b is the minimum distance between the imaginary second straight line 26 and the circumferential line 36 at the underside 42. In an alternative embodiment, it can be provided that the minimum distance b is not measured at the widest part of the guide rail 10.

[0070] Figure 5 , the distance e between the markings 21 and 22 is plotted. The markings 21 and 22 may extend parallel to each other when viewed along the transverse direction y. The markings 21 and 22 may extend obliquely to each other when viewed along the transverse direction y. In particular, the imaginary straight lines 25 and 26 do not intersect on the housing 2 of the motor saw 1 when viewed along the transverse direction y.

[0071] The saw chain space 35 has a height h. The height h is the maximum height of the saw chain space 35 in a direction perpendicular to the longitudinal center axis 12 of the guide bar 10. The distance e corresponds in particular at least to the height h.

[0072] like Figure 5 As shown, in this embodiment, the housing 2 has a further mark 24 between the first mark 21 and the second mark 22. The imaginary further straight line 27 extending along the further mark 24 coincides with the longitudinal center axis 12. The further mark 24 indicates the center position of the piercing cut performed by the motor saw 1. The imaginary further straight line 27 is located at a position corresponding to the longitudinal center axis 12. Figure 5 In the viewing direction parallel to the transverse direction y shown in FIG, the distance is less than 10 mm. In particular, the extension 27 of the marking 24 is inclined at an angle of less than 5° relative to the longitudinal center axis 12. The imaginary further straight line 27 extends in the extension of the further marking 24, in particular in the viewing direction along the transverse direction y.

[0073] Figure 5 The design of the grid 16 of the second longitudinal side 14 of the motor saw 1 is also shown in detail. The grid 16 is formed by mutually intersecting grid bridges 29. Figure 5In FIG. 1 , the suction area 18 is framed by a dotted line. Figure 5 As shown, in the present exemplary embodiment, all markings 21 , 22 and 24 extend in the suction region 18 . In particular, the markings 21 , 22 and 24 extend on the grid webs 29 of the grid 16 .

[0074] Figure 5 Schematically shows the position of the guide bar 10 and the saw chain 11 in the workpiece 51. The guide bar 10 and the saw chain 11 are arranged in a cut-in 52 produced by the saw chain 11. The cut-in 52 has a bottom 53, which corresponds to the desired depth of the cut-in 52. The cut-in 52 is produced using the area of ​​the saw chain 11 arranged at the underside 42 of the guide bar 10. Figure 1 It is shown that in this region the saw chain 11 moves towards the housing 2 during operation.

[0075] To produce the cut-in 52, the guide bar 10 is moved together with the driven saw chain 11 into the workpiece 51 until the second imaginary straight line 26 reaches the desired position of the bottom 53 of the cut-in 52. The guide bar 10 and the saw chain 11 can then be guided out of the cut-in 52. To produce the cut-in 52 using the region of the saw chain 11 that runs along the upper side 41 of the guide bar 10 during operation, the guide bar 10 and the saw chain 11 are moved into the workpiece 51 until the first imaginary straight line 25 reaches the desired position of the bottom of the cut-in. The guide bar 10 and the saw chain 11 can then be guided out of the cut-in.

[0076] Figure 6 An exemplary embodiment of a motor saw 1 is shown, which additionally carries a marking 23. The marking 23 corresponds to the felling strip. In the exemplary embodiment, the marking 23 extends perpendicularly to the longitudinal center axis 12 of the guide rail. In the exemplary embodiment, the marking 23 is parallel to the height direction z. The marking 23 preferably has an angle of less than 5°, in particular less than 2°, in particular less than 1° with respect to the height direction z. When carrying out the felling cut 47 ( Figure 3 ), the mark 23 indicates the direction in which the trunk 28 falls. Figure 6 In the embodiment of the present invention, the mark 23 is also on the motor saw 1 facing away from the parking surface 19 ( Figure 1 ) extends from the upper side 41.

[0077] Figure 7 An exemplary embodiment of a motor saw 1 is shown, which carries a first marking 21, a second marking 22 and a third marking 23. The third marking 23 runs perpendicularly to the markings 21 and 22.

[0078] like Figure 8As shown, the markings 21, 22 and 23 are at least partially formed by ribs 30. The markings 21, 22 and 23 are designed at least partially as protrusions of the housing 2. In particular, the ribs 30 are at least partially (especially completely) formed by the protrusions. The first marking 21 is at least partially formed by a rib 30 extending at a distance d relative to the suction area 18. The second marking 22 is at least partially formed by a rib 30 that delimits the suction area 18. The marking 23 is at least partially formed by a rib 30 that passes through the suction area 18 and partially extends outside the suction area 18. In the present embodiment, the rib 30 is constructed integrally with the housing part of the housing 2.

[0079] Fig. 9 An embodiment is shown in which Figure 8 The markings 21, 22 and 23 shown in the figure are additionally highlighted in color. The color design of the markings 21, 22 and 23 is selected so that there is a clear color contrast between the markings 21, 22 and 23 and the surrounding area of ​​the housing 2. In particular, the ribs 30 each have an end side 31 and an opposite longitudinal side 32. In the present embodiment, the end side 31 and the longitudinal side 32 of the rib 30 are highlighted in color. As a result, the rib 30 is well visible even under unfavorable lighting conditions. In an alternative design, it can be provided that only the end side 31 and / or only one of the longitudinal sides 32 is marked in color.

[0080] Figures 10 to 12 An embodiment variant is shown in which the markings 21 and 22 are applied to a marking element 33 which is fastened separately to the housing 2, in the exemplary embodiment to the housing cover 15. In particular, the marking 23 is at least partially formed by a protruding rib 30 of the housing cover 15. In particular, the marking 23 is formed integrally with the housing 2.

[0081] like Fig.12 As shown in the exploded view in FIG. 1 , the marking components 33 are constructed separately from the housing cover 15. Two marking components 33 each form the marking 21 and two other marking components 33 form the marking 22. Fig.10 As shown, the two marking elements 33 of the marking 21 or 22 each extend on opposite sides of the marking 23. In an alternative embodiment, it is provided in particular that at least one marking 21, 22, 23, in particular each marking 21, 22, 23, is formed by a single marking element.

[0082] like Fig.13 As shown, each marking element 33 carries a rib 30 forming a marking 21 or 22. The rib 30 has an outwardly directed end side 31 and a longitudinal side 32. The end side 31 and the longitudinal side 32 may be highlighted in color.

[0083] The marking component 33 can be fastened to the housing 2 , for example, via a snap connection, an adhesive connection, a screw connection, a magnetic connection or by other detachable or non-detachable fixing means.

[0084] Fig.14 Another embodiment of a motor saw 1 is shown. The illustration shows a view toward a first longitudinal side 13 of the motor saw 1. The motor saw 1 has a first marking 21 and a second marking 22 at the first longitudinal side 13. In the embodiment, the markings 21 and 22 are arranged on a sprocket cover 39 of the motor saw 1. Alternatively, the markings 21 and / or 22 may be arranged on the housing 2 of the motor saw 1.

[0085] Fig.14 An imaginary first straight line 25 extending along the first marking 21 and an imaginary second straight line 26 extending along the second marking 22 are drawn in FIG. Fig.14 , the distances a and d, the width c and a section of the circumference 36 of the saw chain space 35 are also plotted.

[0086] The positions of the markings 21 and 22 correspond with respect to the distance e of the markings from one another and with respect to the positions of the markings 21 and 22 when viewed in the transverse direction y of the motor saw 1 to the positions in the preceding exemplary embodiments, to which reference is made to the description thereof.

[0087] According to the above embodiments, the motor saw 1 may have other markings 23 , 24 . Alternatively, it may be provided that the motor saw 1 has only the marking 21 or 22 .

[0088] In accordance with Fig.14 In the embodiment of the present invention, the markings 21 and 22 are configured as lines that stand out in color relative to the material of the sprocket cover 39 or the housing 2. Alternatively or in addition, the markings 21 and 22 can be configured according to the markings 21, 22, 23, 24 in the previous embodiments, for example as raised ribs.

[0089] In addition to the one or more markings 21, 22, 23 and / or 24 on the second longitudinal side 14, the motor saw 1 may also have markings 21 and 22. It may also be provided that the motor saw 1 has one or more markings 21, 22, 23, 24 only on the first longitudinal side 13.

[0090] In all embodiments, the motor saw 1 is guided and carried manually by the operator during operation. The motor saw 1 has no support surface which could form a reference plane for the operator. The operator can estimate the position of the cutting notches produced with the motor saw 1 in a simple manner via the markings 21 and 22. If the markings are formed at the protruding rib 30, the stability of the housing 2 in the region of the rib 3, in particular the rigidity and / or strength, is also increased.

[0091] In all exemplary embodiments, the same reference numerals identify elements that correspond to one another. Further advantageous embodiments result from any combination of the illustrated designs and positions of the numerals of the individual exemplary embodiments.

Claims

1. A motor saw with a housing (2), with a guide rail (10) on which a saw chain (11) is guided, and with a drive motor (9) which is designed to drive the saw chain (11) in a circular manner during operation, wherein: The motor saw (1) has a transverse direction (y) which extends perpendicularly to a plane (37) of the guide bar (10), wherein a housing (2) of the motor saw (1) has a first longitudinal side (13) and an opposite second longitudinal side (14), wherein the longitudinal sides (13, 14) delimit the housing (2) of the motor saw (1) in the transverse direction (y), wherein the saw chain (11) opens a saw chain space (35) when it is wound around the guide bar (10), wherein the saw chain space (35) is delimited by an imaginary circumferential line (36) when viewed in the transverse direction (y) of the motor saw (1), Characterized in that the motor saw (1) has at least one marking (21, 22) on its second longitudinal side (14), wherein the at least one marking (21, 22) is positioned on the housing (2) such that, when viewed along a transverse direction (y) toward the second longitudinal side (14), the circumferential line (36) has a minimum distance (a, b) of no more than 2 centimeters or no distance from an imaginary straight line (25, 26) extending along the marking (21, 22).

2. The motor saw according to claim 1, characterized in that: The at least one marking (22) is positioned on the housing (2) such that, when viewed along the transverse direction (y) toward the second longitudinal side (14), the circumferential line (36) has a minimum distance (b) or no distance from an imaginary straight line (25, 26) extending along the markings (21, 22) and an area of ​​the circumferential line (36) in which the saw chain (11) moves in the saw chain space (35) in the direction of the housing (2).

3. The motor saw according to claim 1, characterized in that: The at least one mark (21, 22) comprises a first mark (21) and a second mark (22), wherein the two marks (21, 22) are positioned on the housing (2) such that, when viewed along the transverse direction (y) toward the second longitudinal side (14), the circumferential line (36) has a minimum distance (a) of no more than 2 centimeters or no distance from an imaginary first straight line (25) extending along the first mark (21); and has a minimum distance (b) of no more than 2 centimeters or no distance from an imaginary second straight line (26) extending along the second mark (22).

4. A motor saw with a housing (2), with a guide rail (10) on which a saw chain (11) is guided, and with a drive motor (9) which is designed to drive the saw chain (11) in a circular manner during operation, wherein: The motor saw (1) has a transverse direction (y) which extends perpendicularly to a plane (37) of the guide bar (10), wherein a housing (2) of the motor saw (1) has a first longitudinal side (13) and an opposite second longitudinal side (14), wherein the longitudinal sides (13, 14) delimit the housing (2) of the motor saw (1) in the transverse direction (y), wherein the saw chain (11) opens a saw chain space (35) when it is wound around the guide bar (10), wherein the saw chain space (35) is delimited by an imaginary circumferential line (36) when viewed in the transverse direction (y) of the motor saw (1), The motor saw (1) has a first mark (21) and a second mark (22) on its second longitudinal side (14), wherein the two marks (21, 22) are positioned on the housing (2) such that the two marks (21, 22) are at any point at a distance (e) of at least 40 millimeters from each other.

5. The motor saw according to claim 4, characterized in that: The guide rail (10) has a longitudinal center axis (12), and at least one of the markings (21, 22) encloses an angle of less than 5° with the longitudinal center axis (12) of the guide rail (10) when viewed along a transverse direction (y).

6. The motor saw according to claim 4, characterized in that: The guide rail (10) extends closer to the first longitudinal side (13) than to the second longitudinal side (14).

7. The motor saw according to claim 4, characterized in that: The motor saw (1) has a grid (16) with openings (17) on the second longitudinal side (14), wherein the openings (17) of the grid (16) and grid bridges (29) located between the openings (17) open up a suction area (18), and at least one of the markings (21, 22) extends at least partially in the suction area (18).

8. The motor saw according to claim 4, characterized in that: The motor saw (1) has a grid (16) with openings (17) on the second longitudinal side (14), wherein the openings (17) of the grid (16) and grid bridges (29) located between the openings (17) expand a suction area (18), and at least one of the markings (21, 22) extends at least partially over the grid bridges (29) of the grid (16).

9. The motor saw according to claim 4, characterized in that: The motor saw (1) has a grid (16) with openings (17) on the second longitudinal side (14), wherein the openings (17) of the grid (16) and grid bridges (29) located between the openings (17) expand a suction area (18), and at least one of the markings (21, 22) extends at least partially outside the suction area (18).

10. The motor saw according to claim 4, characterized in that: At least one marking (21, 22) is formed by a line that stands out in color.

11. The motor saw according to claim 4, characterized in that: At least one marking (21, 22) is formed by a raised rib (30).

12. The motor saw according to claim 11, characterized in that: At least one longitudinal side (32) of the rib (30) is highlighted in color.

13. The motor saw according to claim 4, characterized in that: The motor saw (1) has a further marking (24) on the second longitudinal side (14), wherein, when viewed in the transverse direction (y), an imaginary further straight line (27) extending along the further marking (24) is not at any point on the guide rail (10) at a distance of more than 10 millimeters from the longitudinal center axis (12) of the guide rail (10).

14. A method for making an incision in a workpiece using a motor saw, wherein: The motor saw (1) comprises a housing (2); a guide bar (10) on which a saw chain (11) is guided; and a drive motor (9) which is designed to drive the saw chain (11) in a circular motion during operation, wherein the motor saw (1) has a transverse direction (y) which extends perpendicularly to a plane (37) of the guide bar (10), wherein the housing (2) of the motor saw (1) has a first longitudinal side (13) and an opposite second longitudinal side (14), wherein the longitudinal sides (13, 14) delimit the housing (2) of the motor saw (1) in the transverse direction (y), wherein the saw chain (11) opens up a saw chain space (35) when it is wound around the guide bar (10), wherein in the transverse direction of the motor saw (1) The saw chain space (35) is delimited by an imaginary circumferential line (36) when viewed in a transverse direction (y) toward the second longitudinal side (14), wherein the motor saw (1) has at least one marking (21, 22) on its second longitudinal side (14), wherein the at least one marking (21, 22) is positioned on the housing (2) such that when viewed in a transverse direction (y) toward the second longitudinal side (14), the circumferential line (36) has a minimum distance (a, b) of no more than 2 centimeters or no distance to an imaginary straight line (25, 26) extending along the marking (21, 22), wherein the saw chain (11) is moved into the workpiece (51) until at least one imaginary straight line (25, 26) reaches the desired position of the bottom (53) of the cut-in portion (52).

Images