EP3424656A1 - Guard for a saw and saw fitted with same - Google Patents

Abstract

The invention relates to a protective cover (60) for a circular table saw (10) which has a drive motor (26) and a saw blade (25) which can be driven by the drive motor (26), the saw blade (25) being provided with a section in front of a workpiece contact surface (22 ) of the table saw (10) projects, wherein the saw blade and the workpiece (W), when it rests against the workpiece abutment surface (22) are guided relative to each other, so that the saw blade along a working direction (A1, A2) in the workpiece (W) wherein the protective cover (60) has an upper-side protection device (61) fixed by means of a holding device (45) fixed to the table saw and fixed in the state mounted on the table saw a peak area (41) of the front of the workpiece contact surface of the table saw projecting saw blade up to a front with respect to the working direction (A1, A2) provided for cutting into the workpiece Schneideabs 32) of the saw blade, wherein the upper side protection device (61) only partially covers the saw blade so that a penetration area (44) of the saw blade (25), in particular at least a partial area of the front cutting section (25), is provided for penetration of the saw blade into the workpiece. 32) of the saw blade, remains free. The protective cover has an adjusting protective body arrangement (180) with at least one covering position (V) at least one adjusting device (90, 190) relative to the upper-side protective device (61) between a covering position (V) at least partially concealing the penetration area of the saw blade and a penetration area (44). of the saw blade (25) in a relative to the covering position (V) larger circumference releasing release position (F) adjustable adjusting protective body (80, 81A, 81B) on.

Description

The invention relates to a protective cover for a table saw having a drive motor and a driven by the drive motor saw blade, wherein the saw blade protrudes with a portion in front of a workpiece abutment surface of the table saw, wherein the saw blade and the workpiece, when it rests against the workpiece abutment surface relative to each other are feasible, so that the saw blade cuts along a working direction in the workpiece, wherein the protective cover has a top protection device which is stationary fastened or fixed by a holding device on the table saw and mounted in the table saw state a vertex area of the front of the workpiece contact surface of the table saw projecting saw blade up to a front with respect to the working direction, provided for cutting into the workpiece cutting section of the saw blade covers, the upper side protection device, the saw blade only t eeilweise covers, so that an intended for penetration of the saw blade in the workpiece penetration area of the saw blade, in particular at least a portion of the front cutting portion of the saw blade, remains free.

Such a protective cover is known for example in the Festool table saw CS50 type in the manner of a cover and suction hood. The protective cover covers the upper apex area of the saw blade. The protective cover is usually in front of the saw blade in the working direction, so that the operator is protected against injury. However, areas of the saw blade remain free, so that it is free for cutting into the workpiece or at least partially free.

Based on this, it is the object of the present invention to provide a protective cover with improved protective effect.

To achieve the object is provided with a protective cover of the type mentioned that it is a Verstellschutzkörperanordnung with at least one based on at least one adjustment with respect to the upper side protection device between the penetration of the saw blade at least partially concealing the cover position and the penetration of the saw blade in one Having adjustable covering body adjustable relative to the covering position releasing release position.

It is a basic idea of the present invention that the protective cover has one or more adjusting protective bodies, that is to say an adjusting protective body arrangement. The adjustment protective body can be adjusted relative to the upper side protection device and / or the workpiece abutment surface, so that they cover the penetration region of the saw blade to a greater extent in a covering position than in a release position. In the covering position, parts of the penetration area can be completely or substantially covered. In the covering position, these penetration areas are free-standing, so that the saw blade can saw freely into the workpiece.

The adjusting device may comprise, for example sliding bearing, pivot bearing or both.

Between the drive motor and the saw blade, a transmission may be provided.

The table saw preferably has a sawing unit on which the saw blade and preferably the drive motor is arranged.

The saw unit is preferably stationary with respect to the workpiece contact surface in the working direction or linearly movable. Conveniently, the table saw is a so-called pull saw.

The saw blade, in particular a saw blade bearing saw unit of the table saw, is suitably pivotable about a parallel to the working direction pivot axis with respect to the workpiece abutment surface.

Preferably, the saw blade is in a central position or normal position at right angles before the workpiece abutment surface.

A flat side of the saw blade and the workpiece abutment surface are preferably in a central position or normal position at a right angle to each other.

It is preferred if the upper-side protection device and / or the at least one adjustment protective body extend from the cutting section of the saw blade to a section of the saw blade which is opposite to the cutting section in the working direction.

In a longitudinal direction of the saw blade corresponding to the working direction, the upper-side protection device and / or the at least one adjustment protective body advantageously extend from a forward direction in the working direction to a rearward region of the saw blade in the working direction.

The upper side protection device and / or the at least one adjustment protection body preferably have an elongated shape.

The upper side protection device may have a rod-shaped and / or rod-like and / or fork-shaped configuration. Thus, the upper-side protection device may comprise or be formed by a rod body, a rod body or a fork body.

The at least one adjusting protective body has expediently a plate-like or wall-like shape and / or has a plate body or wall body. The at least one adjustment protective body may also comprise or be formed by a protective grid or a grid body.

Preferably, the at least one adjustment protective body is adjustable in the covering position to a flat side of the saw blade at least close to the cutting section, preferably substantially completely covering position.

Preferably, at least one adjustment device or the at least one adjustment device is arranged between the upper-side protection device and the at least one adjustment protection element, so that the adjustment protection element is adjustably mounted on the upper side protection device. Thus, if, for example, the top protection device is removed from the table saw, the adjustment protective body arrangement is simultaneously removed from the saw in this way. Even if the upper side protection device is in turn adjustable, in particular pivotable, mounted relative to the saw blade or the workpiece contact surface, the adjustment protective body arrangement makes this movement. For example, the upper side protection device is connected to a saw blade driving the saw unit or arranged on a saw unit, which is adjustable relative to the workpiece abutment surface, for example, in a tilted bearing and / or along a longitudinal axis. The arranged on the upper side protection device adjustment support body assembly then moves, so to speak, simultaneously with the saw unit. It is possible in this embodiment that the upper-side protection device with respect to the saw blade is fixed and not adjustable. However, it is also possible that the upper-side protection device is adjustable relative to the saw blade and the adjusting support body arrangement disposed thereon participates, as it were, in the adjustment of the upper-side protection device.

Another measure, which is also provided in combination with the aforementioned measure, may be that the at least one adjusting device is arranged between the holding device and the adjusting protective body and the adjusting protective body is adjustably mounted relative to the holding device. This arrangement makes it possible in particular for the adjustment protection body to be movably mounted independently of the upper side protection device. Of course, several adjustment protective body may be provided, one of which is adjustable on the upper side protection device by means of an adjustment is stored, while another adjustment protective body is arranged on the holding device and is mounted adjustable by means of an adjusting device arranged on the holding device with respect to the holding device.

It is also possible that adjusting protective body are mounted to each other movable. Thus, a variant of the invention provides, for example, that the adjustment protective body arrangement has a first adjustment protective body, which is adjustably mounted with a first adjustment on the holding device or the upper side protection device, and at least one second adjustment protective body which in turn in turn is adjustably mounted on the first adjustment protective body by means of a second adjusting device. Thus, for example, the first adjusting protective body can be mounted pivotably and / or movably on the holding device, so that the second protective body participates in a movement of the first protective body when it is adjusted relative to the holding device or the upper side protection device. The second adjustment protective body is for example pivotally, linearly movable or both mounted on the first adjustment protective body. Due to the different adjustment devices, it is possible to optimally place or position the adjustment protection bodies relative to the penetration area or the saw blade.

A favorable placement or positioning of Verstellschutzkörpern relative to the penetration area of the saw blade is given for example by the following measure:
It is preferably provided that the protective cover has at least two adjustment protective body, which are adjustably mounted by means of adjusting, which are arranged on opposite end portions of the protective cover, for example, the upper-side protection device. For example, the one adjustment in the front direction, the other adjustment arranged in the back direction. A pivot bearing is preferred in each case. The pivot axes of the adjustment expediently run parallel to a rotation axis of the saw blade and / or perpendicular to the working direction. It does not have to be that the adjustment are provided directly on the top protection device. It is possible, for example, that the one adjusting device is arranged on the holding device or the upper side protection device, while the other adjusting device is arranged on the adjustment protective body, which is movably mounted with the first, aforementioned adjusting device with respect to the holding device or the upper side protection device ,

Preferred is an embodiment in which the upper-side protection device and / or the at least one adjustment protective body are designed as a cover or has a cover. A cover hood can cover, for example, side surfaces or flat sides of the saw blade as well as a vertex region or a radial outer circumference.

Preferably, an arrangement is, so to speak, hood-in-hood. An embodiment of the invention may provide, for example, that the at least one adjustment protective body has a cover hood with a receiving space for receiving the upper side protection device. This upper-side protection device can also be designed as a cover, which engages in the cover of the adjustment protection body. It is also conceivable, however, an embodiment in which the upper-side protection device comprises a cover, which comprises a receiving space for receiving the at least one adjustment protective body. It is possible that a plate-like protective body or a plate-like protective device is received in the cover or the receiving space of the cover.

The at least one adjustment protection body expediently has at least one side surface protection body for covering a flat side of the saw blade or is thereby formed. The side surface protection body may be configured, for example, in the manner of a cover wall or cover plate. The side surface protection body may be configured in the manner of a cover.

The at least one adjustment protective body expediently comprises a cover hood, on which at least one side surface protection body for covering a flat side of the saw blade, for example, movable or fixed, is arranged. The advantage of this arrangement is that, for example, at an inclined position of the saw blade relative to the workpiece abutment surface, in particular for so-called miter cuts, the at least one such side surface protection body is conveniently positioned. In particular, the exposed portions of the saw blade can be covered cheaply. For example, in a skew or Gehrungsstellung a flat side of the saw blade on the upper side, the other flat side on the underside. The underside flat side needs less protection. The upper-side flat side, however, is widely exposed. The side surface protection body can be adjusted with respect to this upper side flat side, so that it extends in particular to the workpiece contact surface.

The side surface protection body or the side surface protection body is in particular pivotally mounted on the cover, so that it or he is pivotally mounted in a pivoted to the workpiece abutment surface and pivoted away from the workpiece abutment position position or is. The at least one side surface protection body suitably comprises a plate or a wall body, a grid or the like.

Preferably, a side surface protection body is provided at least at one or exactly on a flat side of the saw blade. Advantageously, an arrangement on that flat side, which forms a top flat side or facing away from the workpiece contact surface flat side at a Miter position or inclination of the saw blade about an oblique to the working direction or working axis.

Also possible is a configuration of a cover which has on opposite hood legs or hood sides in each case such a side surface protection body.

It is preferred if the protective cover comprises opposing side surface protection bodies, in particular plate-like protective bodies, between which a receiving space for the saw blade is provided. The two Side surface protection body are expediently mounted pivotably or linearly movable, so that they are pivotable to the saw blade in front of and away from the saw blade or are displaceable.

A further advantageous embodiment provides that the upper side protection device or the at least one adjustment protection body is configured as a suction hood or has a suction hood. The function of cover and suction hood can be identical. It is possible that only one of the protective devices has a suction hood or is designed as such.

It is preferably provided that the protective cover has a suction hood or cover hood designed or arranged to cover an upper apex region of the saw blade. The two aforementioned hoods, the cover hood or suction hood, are therefore preferably provided or designed to be arranged at the upper apex area of the saw blade.

Furthermore, it is expedient if a suction connection for a suction device is arranged on the upper side protection device and / or the at least one adjustment protection body. For example, can be provided for connecting a suction tube as suction a suction.

The one cover can serve as a guide device or dust guide device for the other cover or exhaust hood.

An air flow to the suction hood or the suction connection can be improved or favored by the following measure. It is preferably provided that the upper side protection device and / or the adjustment protective body has at least one external air opening, in particular an arrangement of a plurality of external air openings, for the inflow of external air into the area of the saw blade. For example, a grid-like or rib-like structure of a plurality of external air openings is provided. The external air opening may, for example, be designed as a slot or have a slot. An arrangement of a plurality of slot-like external air openings is preferred.

A Aufgleitschräge runs in the protective cover according to the invention preferably arcuately around a respective pivot axis of an adjustment protective body around. The arch form does not have to be circular.

A pivot axis of an adjustment protective body about which it is pivotable relative to the upper side protection device, expediently extends transversely, in particular perpendicularly transversely, to the working direction and / or parallel to the axis of rotation of the saw blade.

An adjustment protective body which is designed in the manner of a wall is expediently contoured in the manner of a fin. The fin or the wall-like adjustment protection body is preferably pivotally mounted at one end. Overall, it is advantageous if a respective adjustment-protection body is pivotally mounted at its respective end, so that the largest possible pivoting range is present. At this point it should be mentioned that adjustment-protection body can of course also be pivotally mounted pivotably and displaceably with respect to the holding device or the workpiece abutment surface.

On the upper side protection device and / or on the at least one adjustment protective body, a sliding bevel is expediently arranged or provided, on which the workpiece for adjusting the upper side protection device or the adjustment protection body can slide away from the saw blade. However, the Aufgleitschräge can also serve that when adjusting the protective cover relative to the workpiece abutment surface, the workpiece abutment surface adjusts the upper side protection device and / or the adjustment protection body.

Also advantageous is an arrangement of at least two adjustment protective bodies that can be actuated relative to one another, for example on the basis of a sliding bevel. For example, the adjustment protective body depending on the action or depending on the loading of the workpiece from the covering position or their respective covering position are adjusted in their respective release position. It is also advantageous if the adjustment protective bodies are adjustable relative to one another on the basis of the sliding bevels. Thus, when the workpiece initially comes into contact with the one adjustment protection element, it displaces it out of the covering position in the direction of its release position. In another Relativverstelllung of saw blade and workpiece to each other and the other adjustment protective body is still adjusted from its respective covering position in its release position.

A window is expediently arranged on the top protection device and / or on the at least one adjustment protection body, through which the saw blade, for example an upper or user-facing region of the saw blade, can be viewed. If both the protective device and the adjustment protective body each have a window, these are expediently aligned with each other. It is particularly advantageous if, through the window arrangement, in any case the at least one window, a cutting-in area or cutting area of the saw blade can be seen in the workpiece.

In principle, it is conceivable that the protective cover is held by a holding device, which is designed and arranged, for example, in the manner of a portal or the like. Thus, the protective cover can be held, so to speak, from above or on an upper side and extend downwards in the direction of the saw blade.

However, an arrangement is preferred such that the holding device is a splitting wedge and / or arranged in the working direction behind the saw blade and formed in a sawed by the saw blade saw slot of the workpiece matching supporting body or comprises such a support body or is formed thereby. Thus, as the splitting wedge, which keeps apart the already dissected out workpiece, at the same time serve as a support or holder for the protective cover. At this point, but not necessarily a riving knife must be provided. Any other support that fits in the kerf, for example a support rod or a support rod, is also suitable as a support body or holding device.

The holding device expediently comprises at least one hook and / or a hook receptacle for hooking with the upper side protection device. Furthermore, it is advantageous if the holding device comprises a retaining screw or a bolt or a bolt, with which the protective cover can be locked relative to the holding device or relative to the table saw. A particularly preferred embodiment provides that the holding device comprises a hook arrangement with which, for example, the riving knife or the supporting body and the protective cover can be hooked together, wherein with reference to a bolt, in particular a screw, this hook connection can be locked against loosening. Thus, the hook and the hook receptacle of the hook assembly can not be disengaged. If the hook arrangement, i. Hook and hook receptacle, are in engagement with each other, the latch can be brought into engagement with the holding device and the upper side protection device.

At this point it should be mentioned that the holding device can form part of the protective cover or the table saw.

Furthermore, a fixing device for fixing the at least one adjusting protective body in the covering position and / or the release position is preferably provided. The fixing device may for example comprise a latching device with at least one catch and / or a clamping device with at least one clamp.

Further preferred is a guide device for guiding the adjustment protective body or the adjustment protective body between the release position and the covering position. The guide device may for example comprise a guide projection, which engages in a guide receptacle. The guide projection can, for example, engage in an external air opening.

The adjustment expediently comprises at least one pivot bearing and / or one sliding bearing.

A table saw according to the invention has a drive motor and a driven by the drive motor saw blade, wherein the saw blade in the use position of the table saw upwardly in front of a passage opening of a workpiece abutment surface, such as a saw table protrudes. The saw blade and the workpiece, which bears against the workpiece abutment surface, can be guided relative to one another. For example, the saw blade can be moved relative to the workpiece or the workpiece relative to the saw blade, so that in any case cuts the saw blade along a working direction in the workpiece. For example, the table saw is a so-called pull saw, i. that the saw blade is arranged on a saw unit, which can be pulled by means of a guide device along the workpiece bearing surface, for example the saw table.

The saw blade is covered by a protective cover according to the invention.

Alternatively and in principle an independent invention performing is provided that at the passage opening laterally adjacent at least one flat side of the saw blade with respect to the saw blade and the workpiece abutment movably mounted closure means for at least partially closing the passage openings is arranged. The closure device comprises, for example, a plate body or adjustment body or closure body which, as it were, closes the passage opening. By the closure device, for example, the gap between the saw blade and the saw table is further closed or better closed than without the closure device. This prevents a finger of an operator or other object from entering the space between the saw blade and the saw table, in any case into the passage opening. Of course, it is advantageous if the closure device permits a movement play of the saw blade, ie that the closure device does not bear on the saw blade, even if it is displaced into a protective position closing the passage opening.

In this protective position, the protective closure device is expediently loaded by a spring arrangement. Thus, the closure device is automatically adjusted to the guard position, so to speak.

It is also advantageous if the protective device extends along the entire longitudinal length of the saw blade and / or the passage opening.

The saw blade may expediently be mounted so as to be tiltable about a pivot axis parallel to the working direction. It is particularly preferred if the closure device participates in a pivoting movement of the saw blade about the pivot axis or is taken along by a corresponding entrainment. It is preferred if the closure device is arranged on a sawing unit of the circular table saw, which is movable relative to the workpiece abutment surface, for example, adjustable and / or adjustable along the working direction, stored. For example, the saw unit is mounted in the manner of a carriage or a carriage on a frame or housing of the table saw longitudinally movable along the working direction. The closure device is expediently arranged on such a carriage or carriage and / or forms part of the sawing unit.

In any case, it is advantageous if the saw blade is mounted linearly displaceable along the working direction with respect to the workpiece abutment surface.

Figur 1

eine perspektivische Schrägansicht einer Tischkreissäge,

Figur 2

eine perspektivische Schrägansicht einer Schutzabdeckung der Tischkreissäge sowie einer Halteeinrichtung dafür,

Figur 3

eine perspektivische Detailansicht der Tischkreissäge gemäß Figur 1 mit der Schutzabdeckung gemäß Figur 2,

Figur 4

eine Ansicht ähnlich wie Figur 3, wobei die Schutzabdeckung teilweise in eine Freigabestellung verstellt ist,

Figur 5

eine Detailansicht ähnlich wie Figuren 3 und 4, wobei das Sägeblatt in eine Gehrungslage schräg verstellt ist und die Schutzabdeckung in eine das Sägeblatt abdeckende Abdeckstellung verstellt ist,

Figur 6

eine Seitenansicht des Details gemäß Figur 5,

Figur 7

eine Seitenansicht der Schutzabdeckung ähnlich einem Teilschnitt entlang einer Schnittlinie A-A in Figur 2, wobei Teile der Schutzabdeckung abgenommen sind,

Figur 8

die anzeigt etwa entsprechend Figur 7, wobei eine Oberseiten-Schutzeinrichtung der Schutzabdeckung an der Halteeinrichtung montiert ist,

Figur 9

ein Detail D1 aus Figur 8 während der Montage der Oberseiten-Schutzeinrichtung an der Halteeinrichtung,

Figur 10

eine Querschnittsansicht der Tischsäge gemäß Figur 1, etwa entlang einer Schnittlinie B-B,, wobei jedoch die Schutzabdeckung seitlich neben einem Gehäuse der Tischkreissäge in einer Aufbewahrungsposition angeordnet ist,

Figur 11

ein Detail D2 aus Figur 10 mit einer Prüfsonde, und

Figur 12

eine Detailansicht etwa entsprechend Figur 11, wobei das Sägeblatt in eine den Figuren 5 oder 6 entsprechende Gehrungslage schräg geschwenkt ist.

Hereinafter, an embodiment of the invention will be explained with reference to the drawing. Show it:

FIG. 1

a perspective oblique view of a table saw,

FIG. 2

a perspective oblique view of a protective cover of the table saw and a holding device therefor,

FIG. 3

a detailed perspective view of the table saw according to FIG. 1 with the protective cover according to FIG. 2 .

FIG. 4

a view similar to FIG. 3 wherein the protective cover is partially displaced into a release position,

FIG. 5

a detailed view similar to FIGS. 3 and 4 wherein the saw blade is inclined in a miter position and the protective cover is adjusted in a covering position covering the saw blade,

FIG. 6

a side view of the details according to FIG. 5 .

FIG. 7

a side view of the protective cover similar to a partial section along a section line AA in FIG. 2 with parts of the protective cover removed,

FIG. 8

which indicates approximately accordingly FIG. 7 wherein a top protection device of the protective cover is mounted on the holding device,

FIG. 9

a detail D1 off FIG. 8 during assembly of the top guard on the fixture,

FIG. 10

a cross-sectional view of the table saw according to FIG. 1 approximately along a section line BB ,, wherein, however, the protective cover is arranged laterally next to a housing of the table saw in a storage position,

FIG. 11

a detail D2 off FIG. 10 with a test probe, and

FIG. 12

a detailed view about accordingly FIG. 11 , wherein the saw blade in a FIGS. 5 or 6 corresponding miter position is tilted obliquely.

A table saw 10 is suitable for sawing a workpiece W, for example a wood workpiece. On a frame 11 of the table saw 10, which has feet 12, a saw upper part 15 is arranged. The feet 12 can, for example be supported with additional supports 13 on a substrate. The supports 13 are fastened to the feet 12, for example, with clamping screws or the like other fastening means and can in an in FIG. 1 shown spread position or support position are adjusted, where they are supported in addition to the free end portions of the feet 12 on the ground. The feet 12 may be interconnected by cross braces 12A.

The saw upper part 15 could be placed with its own support elements 17, namely support legs or the like, directly on a substrate. The supporting elements 17 are shorter than the feet 12, so that the saw upper part 15 parked directly on the ground is closer to the ground than in the state mounted on the frame 11.

The support elements 17 are connected to the feet 12 by means of fastening means 14, in particular clamping screws, bolts or the like. Thus, the frame 11 can be easily solved by the saw upper part 15.

The saw upper part 15 has a housing 16, from which the support elements 17 protrude. Between side walls 18 of the housing 16, a saw unit 24 with a drive motor 26 and a driven or driven by the drive motor 26 saw blade 25 is movably mounted.

The saw unit 24 is arranged below a guide plate 19 of the saw top 15. The guide plate 19 has on its upper side a workpiece abutment surface or guide surface 22 on which the workpiece W can be guided or onto which the workpiece W can be placed in order to introduce a saw cut into the workpiece W by means of the saw blade 25.

The saw unit 24 is inclined by a tilting device 20 about a pivot axis S. The saw unit 24 is in FIG. 1 indicated only schematically, in FIG. 10 however, visible on average. The tilting device 20 comprises an arcuate guide 27, in which a not visible in the drawing guide follower or link follower, for example, a thumbwheel, in particular a gear, slides or runs. If a thumbwheel or gear provided is, this is expediently by means of a control handle 21, in particular a handle, rotatable.

The respective pivotal position of the saw blade 25 or of the saw unit 24 with respect to the housing 16 or the guide plate 19 can be fixed by means of a fixing device, for example a clamping device, locking device or the like. The fixing device or the like. The fixing device can be actuated by means of an actuating handle 28.

Furthermore, a height with which the saw blade 25 protrudes in front of the workpiece abutment surface 22 is adjustable by means of a height adjustment device 29, from the in FIG. 1 only a handwheel or other actuating handle is visible. Thus, therefore, the orientation of the saw blade 25 to the workpiece abutment surface 22 not only in relation to the inclination or miter position, ie a pivotal position about the pivot axis S, but also with respect to a height H, with the saw blade 25 in front of the workpiece abutment surface 22 upwards protrudes, adjustable.

In addition, the position of the saw blade 25 can be adjusted with respect to a longitudinal axis L, because the saw unit 24 and thus the saw blade 25 along the longitudinal axis L slidably with respect to the saw upper part 25 or the workpiece abutment surface 22 is mounted on a longitudinal adjustment 30 / are. The longitudinal adjustment device 30 is only partially visible in the drawing. In any case, the saw unit 24 by means of an actuating handle 31, for example a handle, with respect to the guide plate 19 slidably, so that the saw blade 25 moves in the passage opening 23 along and thereby can cut into the workpiece W. It can thus be seen that on the one hand the workpiece W relative to the saw blade 25 on the workpiece abutment surface 22 along a working direction A1 or the saw blade 25 relative to the workpiece W by means of the Längsverstelleinrichtung 30 along a working direction A2 are adjustable.

It is also a simultaneous movement of the workpiece W along the working direction A1 and the saw blade 25 along the direction A2 possible. In both Cases cut in the direction A1 or A2 forward cutting section 32 in the workpiece W a. On the cutting portion 32, as well as on the entire outer circumference of the saw blade 25 saw teeth 34 are arranged or other cutting means which cut into the workpiece W a Sägeschlitz. The saw blade 25 penetrates, in part also with its flat sides 33, into a kerf Z, which it cuts into the workpiece W, and divides the workpiece W into workpiece parts W1 and W2. The workpiece parts W1 and W2 are held apart by a splitting wedge 35 which is arranged behind the saw blade 25 in the working direction A1, A2.

The splitting wedge 35 is fastened to the saw unit 24, so that it participates in the positioning movements of the saw blade 25 or the saw unit 24, in particular the skew movements about the pivot axis S or the height adjustment with respect to the height H. The splitting wedge 35 is by means of fastening means 36 with connected to the saw unit 24. Of the fasteners 36 screw holes 37 are shown on the riving knife 35, which are penetrated by screws, bolts or the like, not shown, when the riving knife 35 is connected to the saw unit 24. The screws, bolts or the like are connected to a relative to the saw unit 24 fixed component. In addition, an unillustrated holding projection of the saw unit 24 expediently engages in a holding receptacle 38 on the splitting wedge 35. The holding receptacle 38 includes, for example, a slot or a longitudinal slot or other passage opening.

Consequently, therefore, a rearward in the direction A1 or A2 section 40 of the saw blade 25 is covered by the riving knife 35. Namely, the splitting wedge 35 has an inner circumferential contour 39, which is circular and extends at a small distance along the outer circumference or along the saw teeth 34. Thus, in any case, the saw blade 25 is covered at its rear side in the working direction A1 or A2 section 40 so to speak peripherally, which reduces a risk of injury.

The splitting wedge 35 extends from this aforementioned rear portion 40 of the saw blade 25 a little way up to its apex portion 41 of the saw blade 25, which projects furthest in front of the workpiece abutment surface 22. Thus, if the saw blade 25 is protected so to speak only with the splitting wedge 35, both the front cutting portion 32 and the apex portion 41 are free-standing, which on the one hand allows a convenient use of the table saw 10 and thus a favorable workpiece machining of workpieces in the manner of the workpiece W. on the other hand involves a certain security risk.

In addition, there are certain safety risks and erroneous operating risks to the effect that the passage opening 23, ie an elongated slot on the guide plate 19, is relatively wide to allow the miter position or inclined position of the saw unit 24 with respect to the pivot axis S. In particular, it is possible for an operator to be able to reach into the interior of the housing 16 between the side walls 18, so that he reaches the area of the saw slot or the passage opening 23, also in the area where the saw blade 25 is located. However, an intervention of the operator, exemplified by a test probe F in FIG. 5 , prevented from the bottom in the region of the passage opening 23 by a closure device 50. The closure device 50 comprises a closure element 53 movably mounted on a pivot bearing 51, of which a pivot axis 52 is shown (eg an axle body). The closure element 53 preferably has an elongated shape and extends along one of the flat sides 33 of the saw blade 25. The closure element 53, which could also be referred to as a closure body, by a spring assembly 54 in a passage opening 23 at least partially closing the closing position, shown in the FIGS. 10 and 11 , spring loaded. In any event, the test element or the test probe F can not pass in the direction of the saw blade 25 past a free end region of the closure element 53, see FIG. 11 , In this case, the test element or test probe acts even more in a closure element 53 in the direction of the closure position, that is to say the position obstructing the passage opening 23 or the access to the saw blade 25.

However, it is possible by the movable mounting based on the pivot bearing 51 (a sliding bearing or swivel / sliding bearings could also be provided), that the saw blade 25 is still freely positionable with respect to the passage opening 23, without the closure device 50 is in the way. This can be seen for example at the miter position of about 45 degrees with respect to the pivot axis S in FIG. 12 , In addition, the saw unit 24 is adjusted in relation to the workpiece abutment surface 22 furthest upward, so that the arranged on the underside of the guide plate 19 closure element 53 must yield to this adjustment. The closure element 53 is actuated, for example, by the underside 42 of the guide plate 19.

The spring arrangement 54 comprises a leg spring 55, which has a leg 56 supported on the closure element 53 and a leg 57 which is tuned with respect to the saw unit 25. The leg spring 55 is penetrated by the pivot axis 53.

The top-level protection, as it were, with respect to the workpiece contact surface 22 is provided in the table-top circular saw 10 by a protective cover 60.

The protective cover 60 includes a top protection device 61 which is attached to the splitting wedge 35. The splitting wedge 35 thus forms a retaining device 45. The upper-side protective device 61 can be fastened detachably by means of fastening means 46. The splitting wedge 35 forms a supporting body 43. At a free end region of the supporting body 43 or the splitting wedge 35, a hook receptacle 47 and a locking receptacle 48 are provided, with which the upper-side protection device 61 can be brought into engagement.

The top protection device 61 is designed hood-like or forms a cover 62. The cover 62 is in two parts and has, for example, mating hood parts 63A, 63B which are screwed together by means of screws. Illustrated are exemplary screw domes 64. The cover hood 62 has an upper side wall 66, from which side walls 65 extend away. At the area facing away from the upper side wall 66, a penetration opening or inlet opening 67 is provided, into which, for example, suction air and / or the saw blade 25 can penetrate. The inlet opening 67 extends extends from a front, free end region 68, which is assigned to the cutting section 32, to a rear end region 69 of the covering hood 62 or the upper-side protection device 61, in which the upper-side protection device 61 is secured to the holding device 45 , The end portions 68, 69 thus extend from the cutting portion 32 to the rear portion 40 of the saw blade 25. The top guard 61 thus effectively covers the upper, free crown portion 41 of the saw blade 25.

In the space between the side walls 65 of the cover 62, exhaust air may flow to the rear end portion 69 where a suction port 70 is disposed. To the suction connection 70, a suction device AS, in particular with a suction pipe SR can be connected. The suction connection 70 comprises, for example, an extraction nozzle for connecting a particularly flexible suction tube SR.

At the rear end region 69 of the upper-side protection device 61 in the working direction A1, A2, a receptacle 72 for the support body 43 of the holding device 45 is present. The receptacle 72 comprises a support surface 74 on which a support surface 49 of the support body 43 can be supported. The support surface 49 is the free narrow side of the support body 43. On this free steel side is also the hook receptacle 47 for engagement in a hook body 73, which is configured for example in the manner of a pin or bolt body and projects, for example, from the hood part 63A in the direction of the hood part 63B and / or extending between the hood parts 63A and 63B. The top protection device 61 can thus be hooked with the hook body 73 in the hook receptacle 47, which in FIG. 9 is indicated. Then the locking receptacle 48, for example a passage opening, comes to lie in the region of a locking bolt 75 of the upper-side protection device 61 and aligns with this, so that the locking bolt 75 can be pushed through the locking receptacle 48. As a result, a form-fitting hold of the upper-side protection device 61 on the holding device 45 is already realized.

The locking bolt 75 and the locking receptacle 48 form a total of a locking device 148. By tightening the locking bolt 75 in terms of bracing the locking device 148 can not only represent a lock, but at the same time form a clamping device.

In addition, a clamping seat is still advantageous. The locking bolt 75 can namely be screwed by means of an actuating handle 76, for example a rotary knob, with a screw receptacle of the upper-side protection device 61 or the holding device 45. For example, the locking bolt 75 can be screwed into a screw receptacle on the hood part 63A until the upper-side protection device 61 is in a clamping fit with the holding device 45 or is clamped to the holding device 45.

The front end portion 68 of the top guard 61 projects in front of the cutting portion 62, see in particular FIG. 4 so that only a workpiece having a predetermined height can be inserted into the space between the workpiece abutment surface 22 and the upper side protection device 61. In addition, accumulating chip material is effectively sucked through the cover 62 in the direction of the suction port 70 or is sucked out there, allowing a comfortable and safe working.

In the case of the protective cover 60, however, further safety measures are taken, namely in the form of an adjusting protective body 80, on which in turn adjusting protective bodies 81A and 81B are adjustably mounted. The adjustment protective bodies 80, 81A and 81B form an adjustment protective body arrangement 180.

The adjustment protective body 80 is designed, for example, in the manner of a cover 82, in the interior of which the other cover 62, namely the upper side protection device 61, is at least partially accommodated. The cover 82 includes hood parts 83A, 83B which are connected to each other. Exemplary are screw domes 84, screwed into the screws are. Of course, the covers 62 and / or 82 could also be one-piece components, ie not consist of two partial covers or hood parts.

The cover 82 has side walls 25 that extend away from a top wall 86. The top wall 86 and the top wall 66 face each other. Likewise, the side walls 65, 85 opposite and are in particular to each other, at least partially.

Between the side walls 85, an inlet opening 87 is provided into which the saw blade 25 can penetrate. A front end region 88 of the adjustment protective body 80 protrudes in front of the front end region 68 of the upper side protection device 61 in the working direction A1 or A2. At a rear end region 89, the adjustment protective body 80 is mounted movably with respect to the upper side protection device 61 and / or the workpiece abutment surface 22, in particular the holding device 45, by means of an adjusting device 90. The adjusting device 90 includes, for example, an axle body 91, in particular a screw portion of a clamping screw 92, which passes through the covers 61, 82. The clamping screw 82 can be actuated by means of an actuating handle 93. When the clamping screw 92 is at least partially released, the adjustment protective body 80 can pivot about a pivot axis X1 relative to the upper-side protection device 61. However, if the clamping screw 92 is tightened or in a clamping position, it is possible to fix the adjusting protective body 80 relative to the upper-side protection device 61. Thus, therefore, the clamping screw 92 forms part of a clamping device or a fixing device.

However, if the clamping screw 92 is released, for example, the workpiece W, the cover 82, thus the adjustment protective body 80 from a example in the Figures 3 and 5 illustrated cover position V in the direction of an in FIG. 4 adjusted release position F adjust. In the shutdown V, a penetration area 44 of the saw blade 25 provided for sawing into the workpiece W is essentially free. The penetration area 44, however, is in the covering position V at least partially covered by the adjustment protective body 80. In particular, the side surfaces or flat sides 33 of the saw blade 25 can be covered near the cutting section 32 by the adjustment protective body 80.

The clamping screw 92 forms part of a clamping device 392 or a fixing device 290th

A favorable view of the cutting area in the workpiece W and / or the cutting portion 32 allow the windows 77, 94, which are arranged on the upper side protection device 61 and the adjustment protective body 80. The window 77 is provided, for example, on the top wall 66. The window 94 is present on the top wall 86, for example. Thus, the operator can, so to speak, look through both cover hoods 62, 82 in the direction of the saw blade 25, which considerably facilitates handling.

Another flexibility with respect to the cover of the saw blade 25 allow the adjustment protective body 81B, possibly also the further adjustment protective body 81A, which are arranged on opposite sides of the upper side protection device 61, namely in the region of the flat sides 33 of the saw blade 25. The adjustment protective bodies 81A, 81B comprise, for example, wall bodies 185 which are arranged parallel or on the side walls 85. The wall bodies 185 are plate-like. The wall bodies 185 have an area extent such that they can essentially cover the flat sides 33 of the saw blade 25.

The adjustment protective bodies 81A, 81B are adjustably mounted by means of adjusting devices 190. In the present case, the adjusting devices 190 are arranged on the adjusting protective body 80. The adjusting devices 90, 190 are provided at opposite end portions of the protective cover 60. While the adjusting device 90 is provided at the rear end region 89 of the adjustment protective body 80, so that it can be pivoted forwards downwards (with respect to the working direction A1 or A2), at least in the direction of the cutting section 32, the adjusting devices are 190 provided at the front end portion 88. Thus, the adjustment protective bodies 81A, 81B can be adjusted, so to speak, in the working direction A1, A2 from the front into a covering position V covering the rear section with respect to the working direction A1 or A2 of the saw blade 25.

In the drawing, several Abdecksituationen are shown. For example, in FIG. 4 the adjustment protective body 80, 81A, 81B adjusted to the release position F. As a result, the complete penetration area 44 provided for the penetration of the saw blade 25 into the workpiece W is released. The workpiece W can be moved along the flat sides 33 of the saw blade 25. However, safety and protection are still provided because the top guard 61 covers the top apex 41 as well as the back portion 40 of the saw blade 25.

In FIG. 3 the adjustment protective body 80 is adjusted in the covering position V, while the adjustment or the protection body 81 are still in the release position F. As a result, in any case, the penetration region 44 is covered in its front section, close to the cutting section 32. The operator is effectively protected. Now, when the workpiece W and the saw blade 25 are moved relative to each other in the working directions A1 or A2, the workpiece W can slide along the Aufgleitschräge 95 and thus the movable cover, namely the adjustment protective body 80 from the penetration region 44 and in particular from the cutting section Move away 32 so that the workpiece W can be sawn.

When the saw blade 25 is perpendicular to the workpiece abutment surface 22 or to the guide plate 19 ( FIGS. 3, 4 ), the operator will usually hardly be in danger of touching the flat sides 33 of the saw blade 25. However, in a miter position, in particular in a strongly pivoted miter position about the pivot axis S, the saw blade 25 is given a different risk. One of the flat sides 33 is then an upper flat side, so that the operator can grasp the area of the saw teeth 34 comparatively easily. In this situation, the adjustment protectors 81A or 81B are helpful. At this point it should be noted that in the concrete embodiment typically the adjustment protective body 81A is present, because the pivoting about the pivot axis S is given only in one direction, in viewing direction of the user on the cutting portion 32, for example in a pivoting direction to the bottom right.

In the FIGS. 5 and 6 is given such a pivotal situation in which the adjustment protective body 81B can cover the upper flat side 33 of the saw blade 25 facing the operator in the covering position V.

The adjusting device 190 includes, for example, a pivot bearing 191, which is provided by an axle body, such as a bolt, a screw or the like. The pivot bearing 191 is arranged on the front end region 188 of the adjustment protection body 81B in the working direction A1 or A2. A pivot axis X2 of the pivot bearing 191 or the adjusting device 190 and a pivot axis X1 of the adjusting 90 and the axle body 91, which forms a pivot bearing are parallel to each other and extend transversely, in particular perpendicularly transverse, to the working direction A1, A2. The work piece W can actuate the adjusting protective bodies 81A, 81B from the covering position V into the release position F, namely by providing a slide-on slope 195 on both adjusting protective bodies 81A, 81B. The workpiece can slide along the slant slope 195 and also at a lower edge portion 194 of the wall body 185 to operate in the direction of the release position F to keep there.

However, a fixation of the adjustment protective body 81A, 81B in the release position F is readily possible. For example, a latching is provided, namely by a latching projection or latching element 192 of the adjustment protective body 81A, 81B engaging in a latching receptacle or a counter-latching contour 193 on the adjustment protective element 180. The latching contours 192, 193 are provided on the side walls 85 and on the wall body 185. The latching contours 192, 193 form a total latching device 292. Of course, a plurality of latching contours could be provided to the adjustment protective body 81A, 81B in any position between the release position F and the covering position V and intermediate positions to lock.

At this point, it should be noted that a Verrieglung advantageous and is provided in the embodiment, namely, for example, on the adjustment protective body 81A designed for example as a hook receptacle or locking receptacle locking contour 292 is provided, which engages with a locking contour 293, for example a hook projection or locking projection, the adjustment protective body 80 can be brought. The locking contours 292, 293 are to be brought into engagement, for example, in the release position F. Further locking contours could readily be present, so that, for example, the adjusting protective body 81A, 81B not only in the release position F, but also in the covering position V or intermediate positions between the aforementioned positions, in which the penetration region 44 or the side surface or flat side 33rd is only partially covered, lockable.

Furthermore, each of the adjustment protective body 81 A, 81 B is suitably guided by means of a guide on the adjustment protective body 80. The guide comprises, for example, a guide projection 197, which engages in a guide receptacle 198, for example a guide slot. The guide receptacle 198 is also still part of an arrangement of a plurality of external air openings 199, the adjustment of the protective body 81 A, 81 B preferably has. However, the distances or the passage openings of the external air openings 199 are comparatively small or narrow such that a finger of an operator does not pass through, so that he is protected from injury by the saw blade 25.

The guide with the guide contours 197, 198 is provided at a radial distance from the pivot axis X2, so that the adjustment protective body 81A, 81 B is guided in the greatest possible distance from the pivot bearing 191. For example, the guide contour or the guide projection 197 is arranged on the adjustment protective body 80, while the guide receptacle or link 198 is provided on the adjustment protective body 81A, 81B.

The operation or handling of the adjustment protective body 80, 81 A, 81 B is facilitated by operating handles or handles 96, 196. For example, the handle 96 protrudes upward in front of the top wall 86 in the manner of a tongue or a handle projection, so that it can be gripped as an operating nose. The handles 196 are, for example, angularly projecting from the wall bodies 185 handle elements, handle projections or the like.

The foreign air openings 199 form, for example, a grid 299.

Through the external air openings 99, 199, the dust air SL can flow from the side to the saw blade 25, so that it then passes through the inlet opening 87 and the inlet opening 67 in the interior of the protective cover 60 and ultimately can be sucked through the suction nozzle 71 or suction 70 , The flow behavior or suction behavior is thereby optimized. It creates below the protective cover 60 during suction on the suction 70, a favorable flow situation in which the negative pressure conditions are optimally adjusted.

The adjustment protection bodies 81A, 81B form side surface protection bodies 182.

However, it would also be possible for at least one of the adjusting protective bodies 81A, 81B or both adjusting protective bodies 81A, 81B to be mounted directly on the upper-side protective device 60, which is not shown in the drawing. For example, the adjusting device 190, in particular its screw connection or screw bolt or bearing pin, could be arranged directly on the cover hood 62, in particular its front area in the working direction A1 or A2.

The covers 82, 62 are nested, so to speak. On the one hand, this has advantages with regard to the cover of the saw blade 25, ie with regard to the protection of the operator. Furthermore, the suction is optimal. Thus, thus form the cover 62 and the cover 82 suction hoods 78, 98th

Claims (15)

Protective cover for a circular table saw (10), which has a drive motor (26) and a saw blade (25) which can be driven by the drive motor (26), wherein the saw blade (25) protrudes with a section in front of a workpiece contact surface (22) of the table saw (10) in that the saw blade (25) and the workpiece (W) can be guided relative to one another when it bears against the workpiece abutment surface (22) so that the saw blade (25) cuts into the workpiece (W) along a working direction (A1, A2) , wherein the protective cover (60) has a top protection device (61), which is fastened or fastened fixedly to the table saw (10) by means of a holding device (45) and in the state mounted on the table saw (10) has a vertex area (41) of the in front of the workpiece abutment surface (22) of the table saw (10) projecting saw blade (25) up to a front with respect to the working direction (A1, A2) provided for cutting into the workpiece (W) Schne The upper side protection device (61) only partially covers the saw blade (25), so that a penetration area (44) of the saw blade (25) provided for penetrating the saw blade (25) into the workpiece is provided. , in particular at least a portion of the front cutting section (32) of the saw blade (25) remains free, characterized in that it comprises an adjustment protective body arrangement (180) with at least one adjusting device (90, 190) relative to the upper side protection device (180). 61) between a penetration area (44) of the saw blade (25) at least partially concealing the cover position (V) and the indentation (44) of the saw blade (25) in a relative to the cover (V) larger circumference releasing release position (F) adjustable adjustment Protective body (80, 81A, 81B). Protective cover (60) according to claim 1, characterized in that the at least one adjusting device (90, 190) between the upper-side protection device (61) and the at least one adjustment protective body (80, 81A, 81B) is arranged and the at least one adjustment Protective body (80, 81A, 81B) is adjustably mounted on the upper-side protection device (61) or that the at least one adjusting device (90, 190) between the holding device (45) and the adjustment protective body (80, 81A, 81B) is and the at least one adjustment protective body (80, 81 A, 81 B) with respect to the holding device (45) is adjustably mounted. Protective cover according to claim 1 or 2, characterized in that the adjustment protective body arrangement (180) a first adjustment protective body (80) adjustable with a first adjusting device (90) on the holding device (45) or the upper side protection device (61) is mounted, and at least one second adjustment protective body (81A, 81B) which is adjustably mounted on the first adjustment protective body (80) by means of a second adjusting device (190). Protective cover according to one of the preceding claims, characterized in that it comprises at least two adjustment protection bodies (80, 81A, 81B) which are provided on opposite end regions (89, 88) of the protective cover (60), in particular the upper side protection device (61 ), arranged adjusting devices (90, 190) adjustable, in particular pivotable, are stored, and / or that the upper side protection device (61) and / or the at least one adjustment protective body (80, 81A, 81B) as a cover (62, 82) is configured or has a cover (62, 82). Protective cover according to one of the preceding claims, characterized in that it comprises a covering hood (82) with a receiving space for receiving the at least one adjusting protective body (80, 81A, 81B) and / or the upper-side protective device (61) and / or another Cover (62, 82). Protective cover according to one of the preceding claims, characterized in that the at least one adjustment protective body (80, 81A, 81B) comprises at least one, in particular plate-like, side surface protection body (182) for covering a flat side (33) of the saw blade (25) or is formed by the at least one side surface protection body (182) and / or that the at least one adjustment protection body (80, 81A, 81B) comprises a cover hood (62) on which at least one side surface protection body (182) for covering a flat side (33) of the saw blade (25), in particular movably mounted, is arranged. A protective cover according to claim 6, characterized in that it comprises opposing side surface protection bodies (182), between which a receiving space for the saw blade (25) is provided. Protective cover according to one of the preceding claims, characterized in that the upper-side protection device (61) and / or the at least one adjustment protective body (80, 81A, 81B) is designed as a suction hood (78, 98) or a suction hood (78, 98) and / or in that it has an exhaust hood (78, 98) or covering hood (62) designed and / or arranged to cover an upper vertex area (41) of the saw blade (25). Protective cover according to one of the preceding claims, characterized in that on the upper-side protection device (61) and / or the at least one adjustment protective body (80, 81A, 81B) a suction connection (70) for a suction device (AS), in particular a suction nozzle (71) for connecting a suction tube (SR), is arranged. Protective cover according to one of the preceding claims, characterized in that the upper-side protection device (61) and / or the at least one adjustment protective body (80, 81A, 81B) at least one external air opening (99, 199), in particular an arrangement of a plurality of external air openings (99 199) or a grid (299), for the flow of external air into the area of the saw blade (25) and / or that on the upper side protection device (61) and / or on the at least one adjustment protection body (80, 81A, 81B) a Aufgleitschräge (78, 95) is arranged, on which the workpiece (W) for moving the upper side protection device (61) or the adjustment protection body (80, 81A, 81B) away from the saw blade (25). Protective cover according to one of the preceding claims, characterized in that it comprises at least two adjusting protective bodies (80, 81A, 81B) which are actuatable relative to one another, in particular by means of a slide-on slope (78, 95), in particular by the workpiece (W), and / or that on the upper-side protection device (61) and / or on the at least one adjustment protective body (80, 81 A, 81 B), a window (77, 94) is arranged through which the saw blade (25), in particular a the User facing front and / or top of the saw blade (25), is visible. Protective cover according to one of the preceding claims, characterized in that the holding device (45) a splitting wedge (35) and / or in the working direction (A1, A2) behind the saw blade (25) and arranged in a through the saw blade (25) sawn Sägeschlitz (ZS) of the workpiece (W) mating support body (43) comprises or is formed thereby and / or that the holding device (45) at least one hook body (73) or a hook receptacle (47) for hooking with the upper-side protection device (61) and / or at least one locking device (148), in particular a screw, for locking the upper side protection device (61). Protective cover according to one of the preceding claims, characterized in that it has a fixing device (290), in particular a latching device (292) with at least one catch (192) and / or a clamping device (392) with at least one clamp, for fixing, in particular latching, of the at least one adjustment protective body (80, 81A, 81B) in the covering position (V) and / or the release position (F) and / or that the adjusting device (90, 190) comprises at least one pivot bearing (191) or is formed thereby , Table saw (10) with a drive motor (26) and a drive motor (26) driven saw blade (25), wherein the saw blade (25) in the use position of the table saw (10) up through a passage opening (23) of a workpiece abutment surface (22) projects, wherein the saw blade (25) and the workpiece (W), when it rests against the workpiece abutment surface (22), are guided relative to each other, so that the saw blade (25) along a working direction (A1, A2) in the workpiece (W) cutting, characterized in that the saw blade (25) by a protective cover (60) according to one of the preceding claims is covered and / or that at the passage opening (23) laterally next to at least one flat side (33) of the saw blade (25) with respect Saw blade (25) and the workpiece abutment surface (22) movably mounted closure device for at least partially closing the passage opening (23) is arranged. Table saw (10) according to claim 14, characterized in that the closure device is spring-loaded in a protective opening closing the passage opening (23) by a spring arrangement and / or always at a distance from the saw blade (25) and / or that the closure device extends along the extends the entire longitudinal length of the saw blade (25) and / or the passage opening (23) and / or that the saw blade (25) is mounted obliquely about a pivot axis parallel to the working direction (A1, A2) and / or that the saw blade (25) along the Working direction (A1, A2) with respect to the workpiece abutment surface (22) is mounted linearly displaceable.

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