EP4364915B1 - Electric machine tool - Google Patents

Description

The invention relates to an electrical processing machine, in particular a saw, for example a miter saw or a cross-cut saw.

Such processing machines are basically known, for example in the form of so-called cross-cut saws, but also in the form of other machines for processing workpieces made of wood, plastic or metal, for example.

In such processing machines, the working unit is attached to the frame so that it can move relative to the frame in order to carry out a working movement of the working unit and thus of the processing tool relative to the frame and relative to a workpiece to be processed. In the case of miter saws, which are used in particular to cut, i.e. shorten, workpieces that usually have an elongated shape, such as wooden strips or rails or pipes made of plastic or metal, the working unit equipped with the saw blade is attached to the frame so that it can pivot about a single horizontal axis.

In practice, miter saws, as well as other processing machines, are often required to process relatively large workpieces. This requires a relatively large working area or, in the case of a miter saw, a relatively large cutting length. In order to achieve a large cutting length, the work unit is moved linearly in a horizontal direction after being swiveled down, for example using guide rods. Miter saws that are equipped with such a pulling function along a linear axis are also known as miter-pull saws.

To prevent accidents, miter saws have protective hoods that are subject to relevant standards. There is usually a fixed protective hood and at least one variable protective hood. The variable protective hood(s) are Can be pulled in/out when the work unit is moved and/or when a workpiece is contacted. For example, when the work unit is activated or when a workpiece is contacted, the cover "slides" into the area of the fixed protective cover. US 2010/275450 A1 discloses the relevant prior art and the preamble of the main claim.

It is an object of the present invention to propose a processing machine which has a standard-compliant, intuitive and ergonomic retraction behavior of a variable protective hood.

This object is achieved by an electrical processing machine having the features of claim 1. Advantageous further developments are the subject of the dependent claims.

The electrical processing machine according to the invention is in particular a saw, for example a miter saw or a cross-cut saw, and comprises a frame and a working unit which has a working tool and at least one variable protective hood. The variable protective hood encloses a variable part of the working tool. In addition, the processing machine has a gear via which the working unit is attached to the frame and which is designed to enable a guided working movement of the working unit relative to the frame, a guide unit which is arranged on the frame so as to be movable in a travel direction and which is connected to the gear in order to be moved in accordance with a movement of the working unit in the travel direction, and a power transmission mechanism which connects the guide unit to the variable protective hood in order to cause a movement of the variable protective hood relative to the working tool when the guide unit moves in the travel direction and to change the variable part.

The fact that the guide unit is moved in accordance with the movement of the work unit in the direction of travel means that the movement of the guide unit is dependent on the movement of the work unit, i.e. the guide unit is moved when the work unit is moved, for example by a user of the processing machine, who sets the work unit in motion, in particular manually. The movement of the guide unit does not have to be identical to the movement of the work unit in terms of direction and speed. In particular, it should be noted that the work unit is generally essentially freely movable within certain limits in a plane of movement, whereas the guide unit can only be moved in the direction of travel. In particular, when the work unit moves in the plane of movement, only the movement components that are directed in the direction of travel result in a movement of the guide unit, whereas the guide unit is decoupled from movement components of the work unit in other directions in such a way that these do not result in a movement of the guide unit.

Gearboxes are generally known to those skilled in the art. These include, for example, a base and a coupling that are connected to one another by means of rockers. The rockers can each be rigid elements that are connected to the base and the coupling in an articulated manner. When integrating a gearbox into the processing machine according to the invention, the frame forms the base and the working unit forms a coupling of the gearbox.

The gear according to the invention is designed in such a way that the working area of the working unit is not limited to a trajectory curve, but is formed by a two-dimensional surface which can lie in a vertical plane, for example. This enables the user, if the processing machine is designed as a miter saw, for example, to guide the working unit as desired in this plane - referred to as the cutting plane in a saw - whereby different types of cuts can be carried out, such as purely vertical mitering, mitering with a pulling function or groove cuts. A further advantage is that the functional separation between mitering and pulling is practically imperceptible to the user.

The power transmission mechanism causes the variable protective hood to move relative to the work tool when the guide unit moves in the direction of travel, which is caused by the movement of the work unit as described. The power transmission mechanism therefore provides a suitable and ergonomic way of implementing the movement of the variable protective hood when using a gear according to the invention instead of a conventional mechanism consisting of a swivel joint and linear guide. When the work unit moves in a certain direction - a downward movement is particularly suitable here, as will be explained in more detail below - the variable protective hood can be opened sufficiently, i.e. the work tool can be released so that the workpiece can be processed with the work tool. This is also referred to as "connection-activated opening".

The processing machine can also have a fixed protective hood that encloses part of the working tool. During the opening movement of the variable protective hood, it can in particular be at least partially retracted into the fixed protective hood.

The processing machine preferably has a lever that is rotatably mounted on the frame and can be deflected due to a travel movement of the guide unit. The lever can in particular be part of the power transmission mechanism. The lever is therefore given the task of converting the linear travel movement of the guide unit into a rotary movement of the lever.

The frame can have a linear guide for the guide unit, along which the guide unit can be moved. In particular, the frame can have a guide rail that is permanently installed on it and is preferably vertically aligned. Grooves corresponding to the guide rail can be attached to the guide unit itself or to components attached to it. For example, the link can be provided with one, two or more recirculating ball carriages. which act on the guide rail. The guide rail and the recirculating ball carriages then together form the linear guide.

In particular, the direction of travel of the guide unit corresponds to the vertical direction when the processing machine is set up as intended. Then only vertical movement components of the work unit lead to a movement of the guide unit in the vertical direction, whereas horizontal parts of the movement of the work unit do not lead to any movement of the guide unit and therefore have no influence on the variable protective hood. A connection-activated opening of the variable protective hood therefore only occurs due to vertical movement components of the work unit.

In a preferred embodiment, the guide unit has a projection, preferably provided with a contact bearing, for deflecting the lever. In particular, the projection can protrude from the lever laterally or orthogonally to the direction of travel and can be approximately cylindrical. In particular, the projection slides along the lever during the travel movement of the guide unit and deflects the lever.

The lever preferably has a variable rolling contour. The rolling contour is the contour of the section of the lever on which the projection slides or rolls. The variable rolling contour makes it possible for the lever not to be deflected evenly during a travel movement of the guide unit, but for the change in the deflection angle of the lever to depend on which part of the variable rolling contour the projection is currently sliding or rolling on. In other words, a non-linear deflection process of the lever and thus a non-linear opening process of the variable protective cover can be achieved.

The variable rolling contour can have at least a first pitch section and a second pitch section, wherein the first pitch section is steeper in the direction of travel than the second pitch section. In particular, the first pitch section can, in the intended state, of the processing machine above the second pitch section. A movement of the guide unit therefore results in a comparatively large angle of rotation of the lever in the first pitch section. In the second pitch section, however, the rolling contour is relatively flat in relation to the travel path of the projection or the guide unit. A displacement of the guide unit in this position results in a small to barely perceptible swivel angle.

Of course, it is also possible, as required, to divide the variable rolling contour into further pitch sections of different pitches in order to represent a specific non-linear opening movement of the variable protective hood.

The force transmission mechanism is preferably provided with a pulling element which engages a leg of the lever in order to transmit a pulling force resulting from a deflection of the lever to the variable protective hood. The pulling element can be a cable or a Bowden cable and engages on the one hand on the leg and on the other hand at least indirectly on the variable protective hood in order to convert the rotary movement or the deflection movement of the lever into a movement of the variable protective hood. The pulling element can be mounted on one or more deflection rollers.

The power transmission mechanism can have a pivoting lever, which is pivotably mounted on the fixed protective hood, in particular, whereby the pulling element acts on the pivoting lever in order to cause a movement of the variable protective hood relative to the working tool. The pivoting lever can act on the variable protective hood, in particular on a sliding surface of the variable protective hood, for example via a driving pin. By the pulling element acting on the pivoting lever and causing a pivoting movement of the pivoting lever, the pivoting lever causes a retraction movement of the variable protective hood. In particular, this can be done by the driving pin acting on the sliding surface of the variable protective hood and due to the pivoting movement of the pivot lever changes its position and thereby exerts a force on the variable protective hood which causes the retraction movement.

Preferably, the pivot lever can be decoupled from the variable protective hood when the variable protective hood moves in the opening direction from the outside, in particular in the sense of a freewheel. This is done in particular by opening the variable protective hood when it is moved against a workpiece, for example, so that an opening movement of the variable protective hood occurs. This opening movement is also referred to as workpiece-activated opening. For this purpose, the contact between the driving pin and the variable protective hood can be released.

The lever can be pre-tensioned in the deflection direction, in particular by means of a spring. This ensures that the tension element is tensioned and not loose during the workpiece-activated opening described.

The processing machine advantageously has a further variable protective hood which encloses a second variable part of the working tool. In particular, the variable protective hoods are arranged on opposite sides of the fixed protective hood.

The transmission can have a two-stroke mechanism, which comprises a first transmission member and a second transmission member connected to the first transmission member by a transmission joint, and a mechanism for restricting a working range of the working unit predetermined by the two-stroke mechanism, which mechanism comprises a third transmission member and a fourth transmission member, wherein the third transmission member is connected to the first transmission member by a first joint and the fourth transmission member is connected to the third transmission member by a second joint and to the second transmission member by a third joint. The guide unit is for restricting the movement of the second joint within a plane of movement orthogonal to the axis of rotation of the second joint.

While the gear unit in particular has a degree of freedom of f = 2 and allows the user to move the saw unit in an undefined manner in a planar working plane limited only by the length of the gear links, the mechanism for limiting the working area of the working unit specified by the two-stroke can ensure that the working unit cannot reach undesirable positions relative to the frame. In short, the working area is free due to the gear unit but limited by the mechanism, i.e. the working unit can be moved freely within the limits specified by the mechanism. However, the limitation should not be understood in the sense that it reduces the number of degrees of freedom of the gear unit.

The working range specified by the gear is the working range that is theoretically possible without the mechanism, the limits of which are determined solely by the mechanical properties of the gear, in particular the dimensions and position of the gear elements. The limited working range is the actual working range in which the work unit can carry out the intended processing of workpieces.

Preferably, the guide unit has a linear guide for the second joint, in particular designed as an elongated hole, wherein the linear guide further preferably extends in the horizontal direction in the properly assembled state of the saw.

Fig. 1

eine Seitenansicht einer Bearbeitungsmaschine gemäß einem Ausführungsbeispiel in ihrer Ruhelage,

Fig. 2

eine teilweise Seitenansicht einer Bearbeitungsmaschine gemäß einem weiteren Ausführungsbeispiel,

Fig. 3

die Bearbeitungsmaschine aus Fig. 1, wobei die Arbeitseinheit horizontal aus ihrer Ruhelage herausbewegt ist,

Fig. 4

die Bearbeitungsmaschine aus Fig. 3, wobei die Arbeitseinheit gegenüber der Stellung in Fig. 3 nach unten bewegt ist,

Fig. 5

die Bearbeitungsmaschine aus Fig. 4, wobei die Arbeitseinheit gegenüber der Stellung in Fig. 4 noch weiter nach unten bewegt ist,

Fig. 6

eine Seitenansicht des Arbeitswerkzeugs einer Bearbeitungsmaschine während der Bearbeitung eines Werkstücks,

Fig. 7

einen am Gestell drehbar gelagerten Hebel in Seitenansicht,

Fig. 8

eine Schutzhaube mit Arbeitswerkzeug, Schwenkhebel und Zugelement,

Fig. 9

die Schutzhaube aus Fig. 8, wobei gegenüber Fig. 8 die variable Schutzhaube etwas weiter geöffnet ist, und

Fig. 10

die Schutzhaube aus Fig. 8 und 9, wobei der Schwenkhebel von der variablen Schutzhaube entkoppelt ist.

The invention is described schematically and by way of example below with reference to the drawings, in which:

Fig.1

a side view of a processing machine according to an embodiment in its rest position,

Fig.2

a partial side view of a processing machine according to another embodiment,

Fig.3

the processing machine Fig.1 , whereby the working unit is moved horizontally from its rest position,

Fig.4

the processing machine Fig.3 , whereby the work unit is compared to the position in Fig.3 moved downwards,

Fig.5

the processing machine Fig.4 , whereby the work unit is compared to the position in Fig.4 has moved even further downwards,

Fig.6

a side view of the working tool of a processing machine during the machining of a workpiece,

Fig.7

a lever pivoted on the frame in side view,

Fig.8

a protective hood with working tool, swivel lever and pulling element,

Fig.9

the protective cover Fig.8 , whereas compared to Fig.8 the variable protective hood is opened a little further, and

Fig.10

the protective cover Fig.8 and 9 , whereby the pivoting lever is decoupled from the variable protective hood.

Fig.1 first shows a side view of a processing machine 10 according to the invention, which is designed as a cross-cut saw. The processing machine 10 has a stationary frame 11, a working unit 13 with a working tool 15, namely a saw blade, and a gear 23 that connects the working unit 13 to the frame 11. The gear 23 enables a guided working movement of the working unit 13 relative to the frame 11.

The transmission 23 has a two-stroke mechanism. The two-stroke mechanism comprises a first transmission element 43 connected to the frame 11 and a second transmission element 45 connected to the first transmission element 43 by a transmission joint 51. The working unit 13 is arranged on the second transmission element 45.

In addition, the gear 23, as in Fig.2 shown, have a mechanism for limiting a working range of the working unit 13 predetermined by the two-stroke. The mechanism for limiting the working range of the working unit 13 predetermined by the two-stroke comprises a third gear member 47 and a fourth gear member 49. The third gear member 47 is connected to the first gear member 43 by a first joint 53. In addition, the fourth gear member 49 is connected to the third gear member 47 by a second joint 55 and to the second gear member 45 by a third joint 57.

Such a design with the gear 23 allows the user, due to the gear degree of freedom of f = 2, to move the saw unit in an undefined manner in a planar working plane limited only by the length of the gear members, unlike conventional designs. This freedom is only limited by the mechanism for limiting the working area specified by the two-stroke in such a way that the working unit 13 cannot reach undesirable positions relative to the frame 11.

As in Fig.1 As shown, the working tool 15, namely the saw blade, can be divided into four sections A, B, C, D of 90° each. Due to relevant standards, a fixed protective hood and a variable protective hood or several variable protective hoods are regularly required. In the present embodiment, the processing machine 10 has a fixed protective hood 21 and two variable protective hoods 17, 19. The fixed protective hood 21 encloses the working tool at an angle of approx. 150° in sections A and B, whereby section B is completely covered. The variable protective hood 19 covers the remaining uncovered area of section A of approx. 30°. Sections C and D are covered by the variable protective hood 17, but area D is not completely covered.

The variable protective hood 19 is movably mounted on the working unit 13 by a pivot point, which is not shown in detail. The variable protective hood 19 is only activated by the workpiece, as in Fig.6 indicated, that is, when it comes into contact with a workpiece W, it "slides" against a spring load under the fixed protective hood 21 so that the workpiece W can be machined. Due to the spring load, the variable protective hood 19 extends automatically as soon as there is no longer any contact with the workpiece W.

The other variable protective hood 17 should open sufficiently, particularly when the working unit 13 moves downwards, so that the working tool 15 can work on the workpiece W to be separated. This opening process, which should therefore take place without contact with the workpiece W, is also called "connection-activated opening". However, a workpiece-activated opening should also be possible, see in particular Fig. 6 .

Due to the use of the gear 23, which allows greater freedom when guiding the work unit 13, it is necessary to provide a new concept for the connection-activated opening of the variable protective hood 17 compared to conventional processing machines, which, for example, implement the movement of the work unit via a swivel joint and a linear guide. The opening should also be carried out in an intuitive and ergonomically advantageous manner in accordance with the standard.

The inventive concept provides that on the frame 11 a Fig. 2 shown guide unit 25 is arranged to be movable in a travel direction R. The guide unit 25 is connected to the gear 23 by having a horizontal linear guide 59 designed as an elongated hole in which the second joint 55 is guided linearly. The travel direction R corresponds in the present Embodiment of the vertical direction. The guidance of the guide unit 25 itself on the frame 11 is accomplished by a linear guide (not shown).

The work unit 13 has a handle 61, via which the work unit 13 can be moved by a user or operator to machine a workpiece W. When the work unit 13 moves, horizontal movement components consequently lead to a horizontal movement of the second joint 55 in the linear guide 59. Vertical movement components, on the other hand, lead to the guide unit 25 being moved in the travel direction R.

The movement of the working unit 13 in different directions, namely horizontal direction and vertical direction or travel direction R, can thus be decoupled from each other, so that only movement components of the working unit 13 in the travel direction R lead to a connection-activated opening of the variable protective hood 17. For this purpose, the processing machine 10 has a Fig.7 shown and rotatably mounted on the frame 11, which is arranged parallel to the guide unit 25 on the frame 11. The guide unit 25 has a projection 29 with a touch bearing that projects laterally and orthogonally to the direction of travel R towards the lever 27. The lever 27 in turn has a rolling contour for the lever 27 with a first slope section 31 and a second slope section 33. The first slope section 31 runs steeper in the direction of travel R than the second slope section 33 and is arranged above the second slope section 33, with the two slope sections 31, 33 merging directly into one another.

The projection 29, which is firmly attached to the guide unit 25, slides along the rolling contour of the lever 27 during a travel movement of the guide unit 25 in the travel direction R and leads to a deflection of the lever 27. The linear movement of the guide unit 25 is consequently converted into a rotary movement of the lever 27. Due to the nature of the rolling contour, a Movement in the travel direction R in the region of the first gradient section 31 results in a greater angular change of the lever 27 than a movement of the same distance in the travel direction R in the region of the second gradient section 33.

As in Fig.7 As is also shown, the lever 27 is provided on one of its legs 28 with a tension element 35, which in the present embodiment is designed as a cable pull. The tension element 35 is, as Fig. 8 to 10 show, guided via deflection rollers 63 to a pivoting lever 37 pivotally mounted on the fixed protective hood 21, so that by a rotational movement or deflection of the lever 27 via the tension element 35, a tensile force is exerted on the pivoting lever 37, which leads to a pivoting of the pivoting lever 37.

At its free end, the pivot lever 37 has a driving pin 39 which engages a sliding surface 41 of the variable protective hood 17. The pivoting movement of the pivot lever 37 causes the driving pin 39 to press against the sliding surface 41 and thereby open the variable protective hood 17 according to its pivoting angle. A comparison of Fig.8 and 9 clearly shows that the tensile force of the tension element 35 in Fig.9 compared to Fig.8 has caused a pivoting movement of the pivot lever 37, which is why the variable protective hood 17 in Fig.9 is more open than in Fig.8 .

Due to the design of the sliding surface 41 and the driving pin 39, the pivot lever 37 can cause an opening movement of the variable protective cover 17. However, an opening movement caused by external influences is not blocked by the pivot lever 37 in the sense of a freewheel. As in Fig.10 As shown, the variable protective hood 17 can open, for example, by contact with the workpiece W, whereby the driving pin 39 and the sliding surface 41 come out of contact. A workpiece-activated opening as in Fig.6 shown is therefore possible. For this purpose, the lever 27 is pre-tensioned in the deflection direction by means of a spring (not shown), so that the tension element 35 is tensioned and not loose during the workpiece-activated opening described.

With the concept described, the Fig.1 and Fig. 3 to 5 achieved the standard-compliant, intuitive and ergonomic opening behavior of the variable protective hood 17 shown. Due to the design of the guide unit 25, movements of the working unit 13 orthogonal to the travel direction R, i.e. horizontally, are decoupled from movements in the travel direction R, so that only movement components in the travel direction R flow into the opening of the variable protective hood 17. This results from a comparison of Fig.1 and Fig.3 , since the work unit 13 in Fig.3 is extended in the horizontal direction, but the variable protective hood 17 is hardly opened.

Due to the design of the lever 27 with the slope section 31, 33, it also results that the movement of the guide unit 25 leads to a different degree of deflection of the lever 27, depending on which slope section 31, 33 the projection 29 is in contact with. As a comparison of Fig. 3, 4 and 5 shows, during a vertical movement of the working unit 13 the variable protective hood 17 initially opens very quickly ( Fig.4 ) so that the saw blade can be placed on the workpiece W, and with a further downward movement hardly any further ( Fig.5 ) so that the variable protective hood 17 does not open further than necessary for processing. This non-linear opening corresponds to a standard and desired opening behavior.

List of reference symbols

10

Processing machine

11

frame

13

Work unit

15

Work tool

17

variable protective hood

19

variable protective hood

21

fixed protective hood

23

Gearbox

25

Management unit

27

lever

28

leg

29

projection

31

first ascent section

33

second uphill section

35

Tension element

37

Swivel lever

39

Driving pin

41

Sliding surface

43

first gear link

45

second gear link

47

third gear link

49

fourth gear link

51

Gear joint

53

first joint

55

second joint

57

third joint

59

Linear guide

61

Handle

63

Deflection pulley

R

Travel direction

W

workpiece

Claims (15)

1. An electric machine tool (10), in particular a saw, comprising a frame (11);

   a working unit (13) which has a working tool (15) and at least one variable protective hood (17) which encloses a variable part of the working tool (15), a linkage (23) via which the working unit (13) is attached to the frame (11) and which is configured to enable a guided working movement of the working unit (13) relative to the frame (11),

   characterized by a guide unit (25) which is movably arranged at the frame (11) in a direction of travel (R) and which is connected to the linkage (23) to be moved in the direction of travel (R) in accordance with a movement of the working unit (13), and by

   a force transmission mechanism which connects the guide unit (25) to the variable protective hood (17) in order, during a movement of the guide unit (25) in the direction of travel (R), to bring about a movement of the variable protective hood (17) relative to the working tool (15) and to change the variable part.
2. A machine tool (10) according to claim 1,
   wherein the machine tool (10) has a lever (27) which is rotatably supported at the frame (11) and which can be deflected due to a travel movement of the guide unit (25).
3. A machine tool (10) according to claim 1 or 2,
   wherein the frame (11) has a linear guide for the guide unit (25) along which the guide unit (25) can be moved.
4. A machine tool (10) according to any one of the preceding claims,
   wherein the direction of travel (R) corresponds to the vertical direction in the state of the machine tool (10) set up as intended.
5. A machine tool (10) according to any one of the claims 2 to 4,
   wherein the guide unit (25) has a projection (29), which is preferably provided with a contact bearing, for deflecting the lever (27).
6. A machine tool (10) according to claim 5,
   wherein the projection (29) slides along the lever (27) during the travel movement of the guide unit (25) and deflects the lever (27).
7. A machine tool (10) according to any one of the claims 2 to 6,
   wherein the lever (27) has a variable rolling contour, wherein in particular the variable rolling contour has at least a first pitch section (31) and a second pitch section (33), wherein the first pitch section (31) extends steeper with respect to the direction of travel (R) than the second pitch section (33).
8. A machine tool (10) according to any one of the claims 2 to 7,
   wherein the force transmission mechanism is provided with a pulling element (35), in particular a cable control, which engages at a limb (28) of the lever (27) to transmit a pulling force resulting from a deflection of the lever (27) to the variable protective hood (17).
9. A machine tool (10) according to claim 8,
   wherein the force transmission mechanism has a pivotably supported pivot lever (37), wherein the pulling element (35) engages at the pivot lever (37) to effect a movement of the variable protective hood (17) relative to the working tool (15).
10. A machine tool (10) according to claim 9,
    wherein the pivot lever (37) engages at the variable protective hood (17), in particular at a sliding surface (41) of the variable protective hood (17), via a driving pin (39).
11. A machine tool (10) according to claim 9 or 10,
    wherein the pivot lever (37) can be decoupled from the variable protective hood (17) during a movement of the variable protective hood (17) in the opening direction that is brought about from the outside.
12. A machine tool (10) according to any one of the claims 2 to 11,
    wherein the lever (27) is preloaded in the deflection direction, in particular by means of a spring.
13. A machine tool (10) according to any one of the preceding claims,
    wherein the machine tool (10) has a fixed protective hood (21) which encloses a part of the working tool (15).
14. A machine tool (10) according to any one of the preceding claims,
    wherein the machine tool (10) has a further variable protective hood (19) which encloses a second variable part of the working tool (15), wherein in particular the variable protective hoods (17, 19) are arranged at oppositely disposed sides of the fixed protective hood (21).
15. A machine tool (10) according to any one of the preceding claims,

    wherein the linkage (23) has a two-link design, which comprises a first link member (43) and a second link member (45) connected to the first link member (43) by a link joint (51), and a mechanism for limiting a working region of the working unit (13) that is predefined by the two-link design, said mechanism comprising a third link member (47) and a fourth link member (49), wherein the third link member (47) is connected to the first link member (43) by a first joint (53) and the fourth link member (49) is connected to the third link member (47) by a second joint (55) and is connected to the second link member (45) by a third joint (57),

    wherein the guide unit (25) is configured to restrict the movement of the second joint (55) within a plane of movement orthogonal to the axis of rotation of the second joint (55),

    wherein the guide unit (25) preferably has a linear guide (59), in particular formed as an elongated hole, for the second joint (55), wherein the linear guide (59) further preferably extends in the horizontal direction in the state of the saw set up as intended.

Images