Workpiece-stop arrangement for a circular saw

Abstract

The invention relates to a workpiece-stop arrangement for a crosscut saw or mitre saw with two stops (20) arranged spaced apart from each other, wherein a distance region (80) for the passage of a saw blade (76) is formed between the two stops (20). In order to improve the use capability of a circular saw, it is provided that at least one of the stops (20) has a stop piece (30) with a receptacle (33) to or in which an interchangeable stop piece (40) is exchangeably fastened, wherein the interchangeable stop piece (40) protrudes at least in regions over the stop piece (30) into the distance region (80).

Description

[0001] Workpiece stop arrangement for a circular saw

[0002] The invention relates to a workpiece stop arrangement for a mitre saw, in particular a mitre saw or cross-cut saw, with two stops arranged at a distance from one another, wherein a spacing area for the passage of a saw blade is formed between the two stops.

[0003] US Pat. No. 5,819,619 discloses a miter saw comprising a base that can be placed on a flat work surface. The base forms a workpiece support surface. Furthermore, the base carries a pivot arm at its rear, which can be pivoted about a horizontal pivot axis running in the direction of the sawblade plane for bevel cuts. A saw head is attached to the pivot arm and can be pivoted relative to the pivot arm about a miter axis. A workpiece stop assembly is mounted on the workpiece support surface. The workpiece stop assembly has two spaced-apart stops, between which a gap is formed, through which the sawblade can pass when the sawhead is pivoted about the miter axis. The stops each have a support mounted on the workpiece support surface.Each of the supports carries a stop piece that protrudes beyond the workpiece support surface to create a support surface for the workpiece to be machined. The stops can be adjusted relative to the supports to change the width of the gap between the two stops. This is necessary, for example, when making a bevel cut with the circular saw. In this case, the two stops must be spaced further apart to prevent the saw blade from cutting into one of the stops. The greater spacing between the stops makes it easier to avoid cutting into one of the stops.

[0004] Page 1 of 23 When the distance between the two is too small, the effective support surface for the workpiece is reduced, resulting in poor positioning, especially for smaller workpieces. Furthermore, although the problem is well known, it sometimes happens that a stop is accidentally sawed into. In this case, the stop must be replaced, which incurs corresponding costs.

[0005] It is an object of the invention to provide a workpiece stop arrangement of the type mentioned at the outset which offers improved usability.

[0006] This object is achieved in that at least one of the stops has a stop piece with a receptacle, on or in which a stop change piece is replaceably fastened, in order to preferably form a kinematic unit with the stop piece, which can in particular be adjusted uniformly, wherein the stop change piece protrudes at least partially beyond the stop piece into the spacing area.

[0007] This new design offers several advantages. If the saw blade accidentally cuts into the stop change piece, for example, during a bevel cut or, depending on the design of the miter saw, during a rafter cut, the stop change piece itself will not be damaged. The stop change piece can then be easily replaced with a new, undamaged stop change piece at little expense.

[0008] Furthermore, applications are also conceivable in which the miter saw or sliding miter saw is equipped with an emergency braking system that detects capacitive changes via the saw blade. In such a case, it is advantageous if the stop change piece is made of a non-conductive material so that the emergency braking system is not triggered when the saw blade cuts into the stop change piece.

[0009] Furthermore, applications are also conceivable in which good, positionally correct support of the workpiece is desired, especially in the distance area between the two stop pieces. In this case, it is advantageous if the

[0010] Page 2 of 23 The stop change pieces extend as far as possible into the spacing area. An ideal position for the workpiece would be achieved if the entire spacing area was covered by the stop change piece(s).

[0011] For the most ideal support of the workpiece, the stop change piece(s) can be deliberately moved far into the clearance area. The miter saw is set to the desired cutting position, and then the stop change piece is cut with a set cut. This ensures that during a subsequent workpiece cut, the workpiece is supported by the stop change piece(s) immediately adjacent to the saw gap.

[0012] This approach is particularly advantageous when a large number of identical workpieces need to be cut using a specific cutting setting. If a different cutting setting is subsequently selected, the inserted stop change piece(s) can be easily replaced.

[0013] Preferably, at least the portion of the stop change piece that protrudes into the spacing area is made of an easy-to-saw material, for example, a plastic material. Preferably, the entire stop change piece is constructed as a plastic part, in particular as an injection-molded plastic part. The one-piece design of the stop change piece not only reduces the cost of this component but also simultaneously ensures the high dimensional accuracy required for precise workpiece positioning.

[0014] Preferably, the stop change piece is made of a non-conductive material, for example, a plastic material, i.e., it is designed as a plastic part, in particular as an injection-molded plastic part. Constructing the stop change piece as a plastic part prevents the miter saw's emergency braking system from being mistakenly triggered in the event of contact between the saw blade and the stop change piece.

[0015] Page 3 of 23 On a miter saw, the saw blade can be adjusted between two extreme pivoting positions within a pivoting range. Therefore, it is preferable that the stop pieces can be moved as far toward each other as possible so that they cannot enter the pivoting range of the saw blade, which can be achieved using appropriate limit stops. This reliably prevents the stop piece itself from being cut into. Thus, in the extreme pivoting positions, only the stop change piece(s) can cut into the saw blade.

[0016] According to a preferred variant of the invention, it can be provided that both stop pieces each carry an interchangeable stop change piece, wherein the stop change pieces protrude into the spaced area facing one another, and that a sawing gap for the passage of the saw blade is formed or can be formed between the longitudinal ends of the stop change pieces. With such an arrangement, the user can move the two stop pieces, with the stop change pieces held thereon, towards one another and set the desired sawing gap. By providing both stop pieces with stop change pieces, it is prevented that the saw is cut into one of the stop pieces depending on the inclination of the saw blade.

[0017] However, it is also conceivable for a replaceable stop change piece to be connected to both stop pieces, bridging the gap. Such an arrangement is particularly useful when, as described above, an ideal workpiece support surface is desired, i.e. the workpiece support is positioned right up to the saw kerf. Once the miter saw is set to the desired sawing position, the stop change piece can be severed with the saw blade in one setting cut. Since the stop change piece is held by the stop pieces on both sides, the resulting sections of the stop change piece remain on the respective assigned stop piece. The workpiece can then be positioned and cut.

[0018] Page 4 of 23 For ideal support of the workpiece, it can be provided that the stop piece(s) has / have a front-side workpiece contact surface that is / are aligned with a front-side contact surface of the stop change piece, preferably flush with this, or that both stop pieces have a front-side workpiece contact surface that is / are aligned with the front-side contact surfaces of the two stop change pieces.

[0019] It is particularly advantageous if the stop change piece, especially one that is interchangeably connected to both stop pieces, forms a flat or level frontal contact surface for supporting a workpiece. In this way, the stop change piece, which is cut through with the adjustment cut, acts as a kind of splinter guard and prevents the workpiece from tearing out in the saw gap area.

[0020] A conceivable variant of the invention is such that at least one of the stop pieces has a linear guide with one or more guide elements, which is / are designed to adjust the stop piece relative to a fastening section in the width direction of the spacing area, wherein it is preferably provided that the sliding movement of the stop change piece in the direction of the spacing area is limited by means of a limit stop.

[0021] For an exact and precise assignment of the stop change piece to the stop piece, it can be provided that a centering connection is effective between the stop piece and the associated stop change piece, preferably in the region of the receptacle, wherein the centering connection has a centering receptacle into which a centering projection engages, wherein it is preferably provided that the centering connection has two centering receptacles arranged at a distance from one another, into which a centering projection engages. In this case, the centering connection can in particular be designed such that in the assembly position, a front workpiece contact surface of the stop piece is aligned with a front contact surface of the stop change piece. The centering connection can also be designed such that it has a sliding guide between

[0022] Page 5 of 23 the stop piece and the stop change piece, so that the stop change piece can be pushed onto the stop piece until it reaches its assembly position, for example, until it hits a stop provided for this purpose on the stop piece.

[0023] Preferably, the two centering receptacles of the centering connection are arranged at a distance from one another in the direction perpendicular to the workpiece support surface of the table in order to achieve a sufficient support distance and thus a good moment support in this direction.

[0024] A workpiece stop arrangement according to the invention can be characterized in that the stop change piece has at least one fastening receptacle into which a fastening projection of the stop piece is inserted. In this way, a stable, positive-locking connection is created between the stop piece and the stop change piece. Preferably, the fastening projection is oriented such that the insertion movement of the fastening projection into the fastening receptacle is oriented in the direction of the workpiece support surface of the table. This then results in positive support of the stop change piece relative to the stop piece in the horizontal direction. Particularly preferably, the insertion movement runs parallel to the support surface, so that the stop change piece can be easily fastened to the already mounted stop piece.It is particularly preferred that at least two fastening lugs are provided which can be inserted into associated fastening receptacles.

[0025] If the stop change piece is provided with a support section that rests on a support surface of the stop change piece, additional support of the stop change piece can be achieved. Preferably, the support surface is oriented toward the workpiece support surface, preferably parallel to it. This allows for the forces generated during operation and introduced via the workpiece to be safely dissipated.

[0026] Page 6 of 23 A possible embodiment of the invention is such that the stop piece carries a clamping lever on its side facing away from the workpiece contact surface, which clamping lever can be pivoted about a pivot bearing with a pivot axis running transversely to the workpiece contact surface, wherein the stop piece has a clamping piece which can be adjusted by an eccentric of the clamping lever between a release position and a clamping position.

[0027] The object of the invention is also achieved with a stop change piece for a workpiece-stop arrangement, with a base body which has a front-side contact surface for the contact of a workpiece to be machined, wherein the base body has a holding section with one or more fastening receptacles and a seating surface offset from the contact surface. The stop change piece can be exchangeably fastened to a stop piece with its holding section and connected to the stop piece via the fastening receptacles. This achieves the usage advantages already mentioned above. In particular, if the stop change piece is damaged, it can be exchanged for an undamaged stop change piece, thus restoring the usability of the stop for the workpiece.

[0028] If the base body is provided with two mounting receptacles arranged at a distance from one another, formed as openings or recesses in the holding section, then stable support of the stop change piece relative to the stop piece can be achieved. In particular, mounting pieces or the mounting lug of the stop piece can then be inserted into the mounting receptacles. Of course, the mounting lugs on the stop change piece and the mounting receptacles on the stop piece can also be provided with the same effect in (kinematic) reverse.

[0029] The stop change piece can then be easily mounted on the stop piece if it is intended that the holding section is to be used as a

[0030] Page 7 of 23 protruding attachment, in particular designed as a protruding fastening arm.

[0031] For an exact positioning of the stop change piece on a stop piece, it can be provided that the base body has two centering projections spaced apart from one another, which are arranged at a distance from the at least one fastening receptacle.

[0032] A stop change piece according to the invention can be such that the base body has a transition section adjacent to the contact surface, that the seating surface adjoins the transition section, and that the seating surface is arranged offset relative to the contact surface towards the rear of the stop change piece, preferably parallel to the latter. Accordingly, the seating surface of the stop change piece can be placed at the rear against a counter surface of the stop piece and securely supported there. In this case, the contact surface arranged offset relative to the seating surface can be aligned with a front workpiece contact surface of the stop piece and precisely aligned with it. Thus, precise alignment of the stop change piece to the stop piece can be achieved in a simple manner.

[0033] For improved force transmission during operation, it can be provided that the base body carries a support section which projects beyond the rear of the base body opposite to the contact surface and which has a support counter surface.

[0034] A preferred embodiment of the stop change piece can be such that the base body has, on its region facing away from the holding section, an end section with a body edge that forms the longitudinal end of the stop change piece to define a distance area for the passage of a saw blade. Alternatively, however, it can also be provided that the base body carries two holding sections on opposite sides, each of which has at least one fastening receptacle. As already explained above, such a stop change piece can be used to

[0035] Page 8 of 23 to bridge the entire distance range between two stops, where it is then severed in a setting cut.

[0036] The invention is explained in more detail below with reference to an embodiment illustrated in the drawings. They show:

[0037] Figure 1 shows a miter saw, namely a miter saw, in perspective view from the front right,

[0038] Figure 2 shows the miter saw according to Figure 1 in perspective view from the front left,

[0039] Figure 3 shows a perspective view of a stop with a stop piece and a stop change piece,

[0040] Figure 4 shows the arrangement according to Figure 3 in a perspective view from behind,

[0041] Figure 5 is a perspective view of the stop change piece according to Figures 3 and 4 in front view,

[0042] Figure 6 shows the stop change piece according to Figure 5 in perspective view from behind and

[0043] Figure 7 shows the miter saw according to Figures 1 and 2 in perspective view, but with an alternative stop change piece.

[0044] Figure 1 shows a miter saw, specifically a pull-cut miter saw, comprising a base 10. The base 10 has a base frame with which the miter saw can be placed on a support surface. The base 10 has a mount 12. A rotating unit 13 can be pivotally mounted in this mount 12. The rotation axis of the rotating unit 13 runs vertically to the support surface on which the miter saw can be placed. An arm 14 is connected to the rotating unit 13 to pivot the rotating unit 13.

[0045] Page 9 of 23 which protrudes forward beyond the base part 10. The arm 14 accommodates a locking mechanism 15. This locking mechanism 15 can be used to lock the set pivot position of the rotating unit 13.

[0046] The table 11 and the rotating unit 13 together form a workpiece support surface on which a workpiece can be placed. A saw slot 16 is provided in the arm 14 and the rotating unit 13. A saw blade 76 of the miter saw can be inserted into this saw slot 16.

[0047] Two stops 20 can be mounted in the area of ​​the workpiece support surface, as shown in Figure 1. The stops 20 can be adjustably positioned on either side of the saw slot 16. A spacer area 80 is formed between the two stops 20, which adjoins the saw slot 16 and through which the saw blade 76 can be guided when performing a separating cut.

[0048] The stops 20 can be designed such that they each have a support 21, which rests on the workpiece support surface by means of a connecting section 22 and can be connected to the table 11. The two supports 21 are arranged on either side of the saw slot 16, terminating with an end piece 23.

[0049] As Figure 1 shows, the supports 21 have guides 24 to which a stop piece 30 can be adjustably attached. The adjustment movement of the stop piece 30 relative to the support 21 occurs horizontally and in the direction of the longitudinal extension of the supports 21. Figures 3 and 4 illustrate that the stop pieces 30 can be equipped with a linear guide 34 for this purpose. The linear guide 34 can have two guide elements 34.1, 34.2 that engage with the guide 24 of the support 21.

[0050] On the front, each support 21 has a stop surface 25 for supporting a workpiece. When assembled, the two stop surfaces 25 of the support 21 are aligned with each other.

[0051] Page 10 of 23 Figures 1 and 2 further show that the base part 10 has a support 18 to which a pivot arm 50 is pivotally mounted. For this purpose, a pivot bearing with a pivot axis is used, which connects the pivot arm 50 to the support 18. The pivot axis runs horizontally and parallel to the workpiece support surface of the table 11. Preferably, the pivot axis is aligned with the saw slot 16.

[0052] Figure 1 illustrates that the support 18 may have a scale 18.1. The set pivot position of the pivot arm 50 can be read from the scale 18.1.

[0053] Figure 1 shows that an adjusting device 60 can be attached to the pivot arm 50. The adjusting device 60 can be moved linearly on a guide 51 of the pivot arm 20 in the direction of the longitudinal extent of the saw slot 16. For example, as Figure 1 shows, the pivot arm 50 can have two protruding guide rods running parallel to one another, which form the guides 51. The adjusting device 60 is guided on the guides 51 by sleeve-shaped guide projections 61. The guide projections 61 are connected to one another via a connecting section 62.

[0054] The adjusting device 60 can have a support 63 to which a saw head 70 is pivotally mounted. Preferably, the saw head 70 is pivotally connected to the support 63 by means of a cross-cut bearing 64. The pivot axis of the cross-cut bearing 64 runs perpendicularly to the pivot axis of the pivot arm 50 and, when the saw head is in a horizontal position, thus parallel to the workpiece support surface of the table 11.

[0055] The saw head 70 has a housing 71 on which a handle 72 with a switch 73 can be arranged. The switch 73 serves to activate a motor 77 of the saw head 70. A saw blade holder 75 and, with the motor 70, a saw blade 76 connected to the saw blade holder 75 can be driven.

[0056] Page 11 of 23 The saw blade holder 75 arranged on the saw head 70 defines a saw blade plane in which a saw blade 76 that can be fixed to the saw blade holder 75 can be rotated.

[0057] Figure 1 illustrates that the saw head 70 may include a saw blade protective cover 74. The saw blade protective cover 74 encompasses the cutting edge of the saw blade 76 in the area of ​​the top of the circular saw, thus providing access protection.

[0058] An adjustable protective cover 78 is connected to the saw blade protective cover 74. This can be pivotally connected to the saw blade protective cover 74 in a known manner. The adjustable protective cover 78 can enclose the lower part of the cutting edge of the saw blade 76. The adjustable protective cover 78 can be pivoted to expose the cutting area of ​​the saw blade 76 during operation. In the state in which the adjustable protective cover exposes the underside of the saw blade 46, it is preferably pivoted at least partially into the housing 71.

[0059] Figures 1 and 2 show the positioning of the saw head 70 in a position at least partially turned downwards around the cutting axis of the cutting bearing 64 in the direction of the workpiece support surface, wherein the adjusting device 60 is in a rear stop position.

[0060] In the setting shown in Figures 1 and 2, the stop pieces 30 are locked relative to the fastening section 17 in the width direction of the spacing area 80 by means of their linear guide 34 such that they are displaced maximally in the direction of the spacing area 80. The sliding movement of the stop pieces 30 and / or the stop change pieces 40 in the direction of the spacing area 80 is thus limited by means of a limit stop.

[0061] As Figures 1 and 2 illustrate, the stop pieces 30 do not extend into the saw blade plane in the maximum displaced position in the direction of the distance range 80, i.e. in the direction of the saw blade plane. Advantageously, the

[0062] Page 12 of 23 The displacement of the stop pieces 30 is limited in such a way that they are not intersected by the saw blade plane, regardless of the orientation of the saw blade plane. In other words, only the stop change pieces 40 extend into the saw blade plane in a position of the stop piece 30 displaced maximally in the direction of the spacing area 80 in at least one orientation of the saw blade plane.

[0063] As Figures 3 and 4 further illustrate, the stop piece 30 has a front-side workpiece contact surface 31, which is preferably flat and which can further preferably be arranged such that it is aligned with the stop surface 25 of the associated carrier 21.

[0064] The stop piece 30 can preferably be designed such that it has a slope 32 on its side facing away from the linear guide 34, which slopes towards the spacing region 80 and thus towards the saw slot 16.

[0065] Figure 4 illustrates that the stop piece 30 has a receptacle 33. Preferably, the receptacle 33 is designed such that it is accessible from the rear of the stop piece 30. At least one fastening projection 34.6 can be provided in the region of the receptacle 33. In the present exemplary embodiment, two fastening projections 34.6 are used. In one possible embodiment, the fastening projections 34.6 are connected in one piece to the component of the stop piece 30 forming the workpiece contact surface 31. Preferably, the fastening projections 34.6 are designed in the form of molded-on cylinders. It is conceivable, as Figure 4 shows, for one fastening projection 34.6 or the plurality of fastening projections 34.6 to have screw receptacles 34.7. In this case, the screw receptacles 34.7 can extend with their central longitudinal axis perpendicular to the workpiece contact surface 31.

[0066] The receptacle 33 can have a seating contact surface 34.8 adjacent to the at least one fastening projection 34.6, which is preferably aligned parallel to the front workpiece contact surface 31.

[0067] Page 13 of 23 In the area of ​​the holder 33, centering holders 34.3, 34.4 can also be provided, which are preferably integrally formed on the body forming the workpiece support surface 31. The centering holders 34.3, 34.4 are arranged spaced apart from one another in a direction perpendicular to the workpiece support surface of the table 11, so that a support distance is created between the centering holders 34.3 and 34.4.

[0068] Figure 4 further illustrates that the stop piece 30 carries an adjustable clamping piece 35 in the region of the guide 34. The clamping piece 35 is arranged and designed such that, in a clamping position, it blocks the displacement of the stop piece 30 relative to the carrier 21. In this case, a clamping lever 36 may interact with the clamping piece 35. The clamping lever 36 is pivotally connected to the stop piece 30 via a pivot bearing 37. The clamping lever 36 is preferably arranged on the rear side of the stop piece 30.

[0069] Figure 4 further shows that the clamping lever 36 has an eccentric 38 that cooperates with the clamping piece 35. In the locked clamping position shown in Figure 4, the eccentric 38 has moved the clamping piece 35 into its clamping position. If the clamping lever 36 is pivoted clockwise, the clamping piece 35 is released and the clamping position is canceled.

[0070] Figures 3 and 4 illustrate that a stop change piece 40 can be interchangeably connected to the stop piece 30. The stop change piece 40 is detailed in more detail in Figures 5 and 6. As these illustrations show, the stop change piece 40 has a base body 49, onto which a holding section 41 in the form of a projecting arm can be formed.

[0071] The holding section 41 can be equipped with one or more fastening receptacles 42. The fastening receptacles 42 can be designed as bores, as shown in the present embodiment.

[0072] Page 14 of 23 The holding section 41 has a seating surface 43 on the front side, which, in the mounted state of the stop change piece 40, preferably extends parallel to the workpiece contact surface 31 of the stop piece 30.

[0073] The design of the stop change piece 40 can be such that the seat surface 43 transitions into a front contact surface 48 via a shoulder 44 of a transition section 47.

[0074] A conceivable design variant of the contact surface 48, as shown in Figures 5 and 6, can be such that grooves 48.1 are arranged in the contact surface 48. The grooves 48.1 serve to improve the manufacturability of the stop change piece 40.

[0075] The design of the stop change piece 40 can be such that the stop change piece 40 has centering projections 45, 46 designed to interact with the centering receptacles 34.3, 34.4. Advantageously, the centering receptacles 34.3, 34.4 and the centering projections 45, 46 interact such that the stop change piece 40 can be displaced perpendicular to the contact surface 48 and / or the workpiece contact surface 31.

[0076] The stop change piece 40 forms a longitudinal end 48.2 at its area facing away from the holding section 41, which can be positioned laterally of the saw slot 16 in the assembled state.

[0077] In the area of ​​its rear side, the stop change piece 40 can be equipped with a support section 48.3, which is preferably formed integrally with the base body 49 in a protruding manner. The support section 48.3 forms a supporting counter surface on its underside, which rests on the support surface 34.5 of the stop piece 30.

[0078] To mount the stop change piece 40 on the stop piece 30, the stop change piece 40 is placed on the back of the stop piece 30 in the area of ​​the holder 33. The centering projections 45, 46 are located on the back behind the centering holders 34.3, 34.4. The stop change piece 40 can now

[0079] Page 15 of 23 with its centering lugs 45, 46, are pushed onto the centering mounts 34.3, 34.4, with the sliding movement running perpendicular to the workpiece contact surface 31 from back to front. The sliding movement of the stop change piece 40 is blocked by the seat surface 43, which abuts against the seat contact surface 34.8.

[0080] In the assembled state, the fastening projections 34.6 are inserted into the fastening receptacles 42. Finally, fastening screws 90 can be screwed into the screw receptacles 34.7 of the stop piece 30, thus fixing the stop change piece 40 to the stop piece 30.

[0081] In addition, an adjustment means, for example an adjustment screw (not shown in the figures), preferably a grub screw, can be provided on the holding section 41 for aligning the contact surface 48 relative to the workpiece contact surface 31. This is of great importance for ensuring precise contact of the workpiece with the stop 20 and / or the stop piece 30. The adjustment means can then serve to align the holding section 41 in the receptacle 33, for example, with the seat contact surface 34.8.

[0082] Figure 2 shows a setting of the miter saw in which the rotating part 13 has been pivoted to its maximum in one direction. Furthermore, the saw head 70 with the pivot arm 50 has been pivoted relative to the base part 10. This represents an example of a possible desired cutting position. The stops 20 can then be adjusted. For this purpose, the stop pieces 30 can be moved toward each other with the stop change piece 41 attached to them, reducing the gap area between the longitudinal ends 48.2 of the stop change pieces 40.

[0083] The workpiece to be machined can then be placed against the stop surfaces 25 of the supports 21 and the aligned workpiece contact surfaces 31 of the stop pieces 30 and against the front contact surfaces 48 of the

[0084] Page 16 of 23 The stop change pieces 40 are placed and supported on them. Finally, a separating cut can be made in the workpiece using the saw blade 76.

[0085] If a stop 20 is inadvertently adjusted incorrectly, such that a stop change piece 40 protrudes into the working area of ​​the saw blade 76, the stop change piece 40 will be damaged during the cutting operation with the saw blade 76. The damaged stop change piece 40 can then be easily replaced with a new stop change piece 40.

[0086] Figure 7 shows a sliding compound miter saw with a further design variant of a stop change piece 40. This sliding compound miter saw is essentially the same design as the sliding compound miter saw shown in Figures 1 and 2. To avoid repetition, reference is made to the above explanations. Therefore, only the differences will be discussed below.

[0087] As Figure 7 shows, the entire spacing area 80 is covered by the stop change piece 40 and is attached to the stop pieces 30 on both sides, i.e., on both sides of the sawblade plane. In other words, the sawblade plane intersects the stop change piece 40, so that the stop change piece 40 is cut into when a separating cut is made, forming a so-called zero-gap stop. With a zero-gap stop, there is no gap between the workpiece-stop arrangement, in particular the stop 20, and the sawblade 76. Thus, an ideal support for the workpiece is formed in the area of ​​the spacing area 80.

[0088] To create the zero-gap stop, the stop change piece 40, which is attached on both sides, is cut through with the saw head 70 adjusted to the desired cutting angle, as shown in Figure 7, and then the stop change piece 40 is cut through with a setting cut. This results in the workpiece being supported on the stop change piece 40 immediately adjacent to the saw gap during a subsequent workpiece cut.

[0089] Page 17 of 23 In the arrangement shown in Figure 7, the stops 20 are locked in a position displaced maximally in the direction of the spacing area 80, i.e. in the direction of the saw blade plane, so that a defined lateral edge and a defined width of the spacing area 80 for receiving a stop change piece 40 adapted to this edge and this distance. Advantageously, the stop change piece 40 extends from the stop pieces 30 into the area of ​​the workpiece support surface.

[0090] Page 18 of 23

Claims

Claims 1. Workpiece stop arrangement for a mitre saw, in particular a mitre saw or cross-cutting saw, with two stops (20) arranged at a distance from one another, wherein a spacing region (80) for the passage of a saw blade (76) is formed between the two stops (20), characterized in that at least one of the stops (20) has a stop piece (30) with a receptacle (33) on or in which a stop change piece (40) is replaceably fastened, wherein the stop change piece (40) protrudes at least partially beyond the stop piece (30) into the spacing region (80).

2. Workpiece stop arrangement according to claim 1, characterized in that both stop pieces (20) each carry an interchangeable stop change piece (40), wherein the stop change pieces (40) project towards one another into the spacing area (80) and that a saw gap for the passage of the saw blade (76) is formed between the longitudinal ends (48.2) of the stop change pieces (40), or that a stop change piece (40) is interchangeably connected to both stop pieces (30) and bridges the spacing area (80).

3. Workpiece stop arrangement according to claim 1 or 2, characterized in that the stop piece or pieces (30) has / have a front-side workpiece contact surface (31) which is / are aligned with a front-side contact surface (48) of the stop change piece (40), preferably merges flush with this, or that both stop pieces (30) have front-side workpiece contact surfaces (31) which are aligned with front-side contact surfaces (48) of the two stop change pieces (40).

4. Workpiece stop arrangement according to one of claims 1 to 3, characterized in that between the stop piece (30) and the associated Page 19 of 23 Stop change piece (40), preferably in the region of the receptacle (33), a centering connection is effective, wherein the centering connection has a centering receptacle (34.3, 34.4) into which a centering projection (45, 46) engages, wherein it is preferably provided that the centering connection has two centering receptacles (34.3, 34.4) arranged at a distance from one another, into which a centering projection (45, 46) engages in each case.

5. Workpiece stop arrangement according to one of claims 1 to 4, characterized in that the stop change piece (40) has at least one fastening receptacle (42) into which a fastening projection (34.6) of the stop piece (30) is inserted.

6. Workpiece stop arrangement according to one of claims 1 to 5, characterized in that the stop change piece (40) has a support section (48.3) which sits on a support surface (34.5) of the stop piece (30).

7. Stop change piece (40) for a workpiece stop arrangement, in particular according to one of claims 1 to 6, with a base body (49) which has a front-side contact surface (48) for the contact of a workpiece to be machined, wherein the base body (49) has a holding section (41) with one or more fastening receptacles (42) and a seating surface (43) offset from the contact surface (48).

8. Stop change piece (40) according to claim 7, characterized in that the base body (49) has two fastening receptacles (42) arranged at a distance from one another and designed as openings or depressions in the holding section (41).

9. Stop change piece (40) according to claim 7 or 8, characterized in that the holding section (41) is designed as a projection projecting from the base body (49), in particular as a projecting fastening arm. Page 20 of 23 10. Stop change piece (40) according to one of claims 7 to 9, characterized in that the base body (49) has two centering lugs (45, 46) spaced apart from one another, which are arranged at a distance from the at least one fastening receptacle (42).

11. Stop change piece (40) according to one of claims 7 to 10, characterized in that the base body (49) has a transition section (47) following the contact surface (48), that the seat surface (43) adjoins the transition section (47), and that the seat surface (43) is arranged offset from the contact surface (48) in the direction of the rear side of the stop change piece (40), preferably parallel to the latter.

12. Stop change piece (40) according to one of claims 7 to 11, characterized in that the base body (49) carries a support section (48.3) which projects beyond the base body (49) at the rear opposite to the contact surface (48) and which has a support counter surface (48.4).

13. Stop change piece (40) according to one of claims 7 to 12, characterized in that the base body (49) has, on its region facing away from the holding section (41), an end section with a body edge which forms the longitudinal end (48.2) of the stop change piece (40) to form a boundary of a spacing region (80) for the passage of a saw blade (76), or that the base body (49) carries two holding sections (41) on opposite sides, each of which has at least one fastening receptacle (42).

14. A cross-cut saw or cross-cut pull-saw, comprising a base part (10) which has a carrier (18) and a rotating unit (13), wherein the rotating unit (13) forms a workpiece support surface and has a rotation axis oriented perpendicular to the workpiece support surface, wherein a pivot arm (50) is pivotally connected to the carrier (18) with a pivot axis oriented perpendicular to the rotation axis, wherein the pivot arm (50) carries a saw head (70) which is designed to hold a saw blade (76) on a saw blade holder (75) defining a saw blade plane Page 21 of 23 to receive, wherein the saw head (70) is pivotally coupled to the pivot arm (50) about a cutting axis of a cutting bearing (64), wherein a saw slot (16) is formed in the workpiece support surface of the rotary unit (13) along the saw blade plane in order to partially receive the saw blade (76) during a separating cut, characterized by a workpiece stop arrangement according to claims 1 to 6 and / or a stop change piece according to claims 7 to 13.

15. Mitre saw or cross-cutting saw according to claim 14, characterized in that at least one of the stop pieces (30) has a linear guide (34) with one or more guide elements (34.1, 34.2) (34.3, 34.4), which is / are designed to adjust the stop piece (30) relative to a fastening section (17) in the width direction of the spacing region (80), wherein it is preferably provided that the sliding movement of the stop change piece (40) in the direction of the spacing region (80) is limited by means of a limit stop, in particular is limited such that the stop piece (30) does not protrude into the saw blade plane in a position maximally displaced in the direction of the spacing region (80) and / or that the stop change piece (40) protrudes into the saw blade plane in a position of the stop piece (30) maximally displaced in the direction of the spacing region (80). Page 22 of 23

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