EP3424656B1 - Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection - Google Patents

Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection Download PDF

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Publication number
EP3424656B1
EP3424656B1 EP18169284.9A EP18169284A EP3424656B1 EP 3424656 B1 EP3424656 B1 EP 3424656B1 EP 18169284 A EP18169284 A EP 18169284A EP 3424656 B1 EP3424656 B1 EP 3424656B1
Authority
EP
European Patent Office
Prior art keywords
saw blade
adjusting
protective
bodies
saw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18169284.9A
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German (de)
English (en)
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EP3424656A1 (fr
Inventor
Jaroslav Fiferna
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festool GmbH
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Festool GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Festool GmbH filed Critical Festool GmbH
Priority to EP20164278.2A priority Critical patent/EP3705249A1/fr
Publication of EP3424656A1 publication Critical patent/EP3424656A1/fr
Application granted granted Critical
Publication of EP3424656B1 publication Critical patent/EP3424656B1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G19/00—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws
    • B27G19/02—Safety guards or devices specially adapted for wood saws; Auxiliary devices facilitating proper operation of wood saws for circular saws

Definitions

  • the invention relates to a protective cover for a table saw, which has a drive motor and a saw blade which can be driven by the drive motor, according to the preamble of claim 1.
  • Such a protective cover is for example in DE 10 2006 055 018 B3 explained.
  • Another protective cover is known, for example, in the Festool table saw type CS50, in the manner of a cover hood and extraction hood.
  • the protective cover covers the upper apex of the saw blade.
  • the protective cover usually protrudes in front of the saw blade in the working direction so that the operator is protected against injuries. Areas of the saw blade remain free, however, so that it is free to cut into the workpiece or at least partially free.
  • a protective cover is provided in accordance with the technical teaching of claim 1.
  • the protective cover has one or more adjusting protective bodies, that is to say an adjusting protective body arrangement.
  • the adjusting protective bodies can be adjusted relative to the upper side protective device and / or the workpiece contact surface, so that they cover the penetration area of the saw blade to a greater extent in a covering position than in a release position. In the cover position parts of the penetration area can be completely or substantially covered. In the cover position, these penetration areas are free-standing so that the saw blade can saw freely into the workpiece.
  • the adjustment device can include, for example, sliding bearings, pivot bearings or both.
  • a gear can be provided between the drive motor and the saw blade.
  • the table saw preferably has a saw unit on which the saw blade and preferably the drive motor is arranged.
  • the saw unit can preferably be moved in a stationary or linear manner with respect to the workpiece contact surface in the working direction.
  • the table saw is expediently a so-called pull saw.
  • the saw blade in particular a saw unit carrying the saw blade of the table circular saw, is expediently pivotable with respect to the workpiece contact surface about a pivot axis running parallel to the working direction.
  • the saw blade preferably projects in a central position or normal position at right angles in front of the workpiece contact surface.
  • a flat side of the saw blade and the workpiece contact surface are preferably at a right angle to one another in a central position or normal position.
  • top protection device and / or the at least one adjustment protection body extend from the cutting section of the saw blade to a section of the saw blade opposite the cutting section in the working direction.
  • the upper side protection device and / or the at least one adjustment protective body advantageously extend from a region of the saw blade that is at the front in the working direction to a rear area in the working direction.
  • the top protection device and / or the at least one adjustment protection body preferably have an elongated shape.
  • the upper side protection device can have a rod-shaped and / or rod-like and / or fork-shaped configuration.
  • the upper side protection device can therefore have a rod body, a rod body or a fork body or be formed thereby.
  • the at least one adjustment protective body expediently has a plate-like or wall-like shape and / or has a plate body or wall body.
  • the at least one adjustment protective body can also comprise or be formed by a protective grille or a grille body.
  • the at least one adjustment protective body is preferably adjustable in the covering position to a position that covers a flat side of the saw blade at least close to the cutting section, preferably essentially completely.
  • At least one adjustment device or the at least one adjustment device is arranged between the top protection device and the at least one adjustment protection body, so that the adjustment protection body is adjustably mounted on the top protection device. If, for example, the top protective device is removed from the table saw, the adjustment protective body arrangement is also removed from the saw in this way. Even if the upper side protective device is in turn adjustable, in particular pivotable, mounted relative to the saw blade or the workpiece contact surface, the adjusting protective body arrangement also makes this movement.
  • the top protection device is connected to a saw unit driving the saw blade or is arranged on a saw unit which is adjustable relative to the workpiece contact surface, for example in an inclined bearing and / or along a longitudinal axis.
  • the adjusting support body arrangement arranged on the top side protective device then moves, so to speak, simultaneously with the saw unit.
  • the upper side protection device it is possible for the upper side protection device to be stationary and not adjustable with respect to the saw blade. It is also possible, however, that the upper side protection device is adjustable relative to the saw blade and that the adjusting support body arrangement arranged thereon, so to speak, takes part in the adjustment of the upper side protection device.
  • Another measure can 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 mounted so as to be adjustable with respect to the holding device.
  • This arrangement makes it possible, in particular, for the adjustment protective body to be movably mounted independently of the upper side protective device.
  • several adjustment protective bodies can be provided, one of which can be adjusted on the upper side protective device using an adjusting device is mounted, while another adjusting protective body is arranged on the holding device and is adjustably mounted with respect to the holding device by means of an adjusting device arranged on the holding device.
  • the adjusting protective body arrangement has a first adjusting protective body, which is adjustably mounted on the holding device or the upper side protective device with a first adjusting device, and has at least one second adjusting protective body, which in turn is in turn is adjustably mounted on the first adjustment protective body using a second adjustment device.
  • the first adjusting protective body can be pivotally and / or movably mounted 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 protective device.
  • the second adjustment protective body is, for example, pivotably, linearly movable or both mounted on the first adjustment protective body.
  • the protective cover has at least two adjustable protective bodies which are adjustably supported by means of adjusting devices which are arranged on opposite end regions of the protective cover, for example the upper side protective device.
  • adjusting devices which are arranged on opposite end regions of the protective cover, for example the upper side protective device.
  • one adjustment device is arranged in the front in the working direction and the other adjustment device is arranged in the rear in the working direction.
  • a pivot bearing is preferred in each case.
  • the pivot axes of the adjusting devices expediently run parallel to an axis of rotation of the saw blade and / or at right angles to the working direction. It does not have to be that the adjustment devices are provided directly on the top protection device.
  • one adjustment device is arranged on the holding device or the top protection device, while the other adjustment device is arranged on the adjustment protection body, which is movably mounted with the first, aforementioned adjustment device with respect to the holding device or the top protection device .
  • top protection device and the at least one adjustment protection body are designed as a cover or have a cover.
  • a cover hood can cover, for example, side surfaces or flat sides of the saw blade as well as an apex region or a radial outer circumference.
  • a hood-in-hood arrangement is provided.
  • An embodiment of the invention can provide, for example, that the at least one adjustment protective body has a cover hood with a receiving space for receiving the upper side protective device.
  • This top-side protective device can also be designed as a cover which engages in the cover of the adjustment protective body.
  • the upper side protection device has a covering hood which comprises a receiving space for receiving the at least one adjusting protective body. It is possible for a plate-like protective body or a plate-like protective device to be accommodated in the cover or the receiving space of the cover.
  • the at least one adjustment protective body expediently has or is formed by at least one side surface protective body for covering a flat side of the saw blade.
  • the side surface protective body can be configured, for example, in the manner of a cover wall or cover plate.
  • the side surface protective body can be designed in the manner of a cover plate.
  • the at least one adjustment protective body expediently comprises a cover on which at least one side surface protective body is used 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, when the saw blade is inclined relative to the workpiece contact surface, in particular for so-called miter cuts, the at least one such side surface protective body can be conveniently positioned.
  • the exposed sections of the saw blade can be covered cheaply.
  • one flat side of the saw blade is on the upper side and the other flat side is on the lower side.
  • the flat side on the underside needs less protection.
  • the top flat side on the other hand, is widely exposed.
  • the side surface protective body can be adjusted with respect to this flat side on the upper side, so that it extends in particular to the workpiece contact surface.
  • the side surface protective bodies are or the side surface protective body is, in particular, pivotably mounted on the cover hood, so that he or she is or is pivotably mounted in a position pivoted towards the workpiece contact surface and pivoted away from the workpiece contact surface.
  • the at least one side surface protective body expediently comprises a plate or a wall body, a grid or the like.
  • a side surface protective body is preferably provided at least on one or exactly on a flat side of the saw blade.
  • An arrangement on the flat side is advantageous which, in the case of a miter position or inclined position of the saw blade about an axis inclined to the working direction or working axis, forms an upper flat side or a flat side facing away from the workpiece contact surface.
  • a configuration of a cover hood is also possible, which has such a side surface protective body on opposite hood legs or hood sides.
  • the protective cover comprises opposing side surface protective bodies, in particular plate-like protective bodies, between which a receiving space for the saw blade is provided.
  • the two Side surface protective bodies are expediently mounted so as to be pivotable or linearly movable, so that they can be pivoted or slid to the saw blade in front of and away from the saw blade.
  • top-side protective device or the at least one adjustable protective body is designed as an exhaust hood or has an exhaust hood.
  • the function of the cover hood 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.
  • 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 covering hood or suction hood, are therefore preferably provided or designed for arrangement on the upper apex area of the saw blade.
  • a suction connection for a suction device is arranged on the upper side protection device and / or the at least one adjustment protection body.
  • a suction connection for connecting a suction pipe can be provided as the suction connection.
  • One cover can serve as a guide device or dust guide device for the other cover or exhaust hood.
  • 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.
  • a grid-like or rib-like structure of a plurality of external air openings is provided.
  • the external air opening can for example be designed as a slot or have a slot. An arrangement of several slot-like external air openings is preferred.
  • a slide-on slope preferably runs in an arc around a respective pivot axis of an adjusting protective body.
  • the arch shape does not have to be circular.
  • An adjusting 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 protective body is preferably pivotally mounted at one end region.
  • a respective adjustment protective body is pivotably mounted at its respective end region, so that the largest possible swivel range is available.
  • adjustment protective bodies can of course also be pivotally mounted, which can be pivoted and displaceably with respect to the holding device or the workpiece contact surface.
  • a slide-on slope is expediently arranged or provided on the top-side protection device and / or on the at least one adjustment protection body, on which the workpiece for adjusting the top-side protection device or the adjustment protection body can slide away from the saw blade.
  • the slide-on bevel can also serve for the fact that when the protective cover is adjusted relative to the workpiece contact surface, the workpiece contact surface adjusts the top side protective device and / or the adjusting protective body.
  • the arrangement of at least two adjusting protective bodies can be actuated relative to one another, for example on the basis of a sliding slope.
  • the adjustable protective bodies are removed from the cover position depending on the exposure or depending on the exposure to the workpiece (V) or their respective cover position (V) is adjusted to their respective release position (F).
  • the adjustment protective bodies can be adjusted relative to one another on the basis of the sliding slopes. So when the workpiece first comes into contact with an adjustable protective body, it moves it from the covering position in the direction of its release position. In the case of a further relative adjustment of the saw blade and the workpiece to one another, the other adjustment protective body is also moved from its respective covering position to its release position.
  • a window is expediently arranged on the upper side protection device and / or on the at least one adjustment protective body, through which the saw blade, for example an upper area or the area of the saw blade facing the user, can be viewed. If both the protective device and the adjusting protective body each have a window, these are expediently in alignment with one another. It is particularly advantageous if the window arrangement, in any case the at least one window, allows a cutting area or cutting area of the saw blade to be seen into the workpiece.
  • 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. The protective cover can be held, so to speak, from above or on an upper side and extend downward in the direction of the saw blade.
  • the holding device forms a riving knife and / or a supporting body arranged behind the saw blade in the working direction and fitting into a saw slot of the workpiece sawed through the saw blade, or comprises or is formed by such a supporting body.
  • the riving knife which holds the workpiece that has already been sawed apart, can also serve as a support or holder for the protective cover.
  • a riving knife does not necessarily have to be provided at this point. Any other support that fits into the saw slot, 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. It is also advantageous if the holding device comprises a holding 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.
  • 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 to one another, this hook connection being lockable against loosening by means of a bolt, in particular a screw.
  • the hook and hook receptacle of the hook assembly cannot disengage. If the hook arrangement, i.e. The hook and hook receptacle are in engagement with one another, the latch can be brought into engagement with the holding device and the upper side protection device.
  • the holding device can form part of the protective cover or the table saw.
  • a fixing device is preferably provided for fixing the at least one adjustment protective body in the covering position and / or the release position.
  • the fixing device can comprise, for example, a latching device with at least one notch and / or a clamping device with at least one clamp.
  • a guide device for guiding the adjusting protective body or the adjusting protective body between the release position and the covering position is further preferred.
  • the guide device can, for example, comprise a guide projection which engages in a guide receptacle.
  • the guide projection can engage, for example, in an external air opening.
  • the adjusting device expediently comprises at least one pivot bearing and / or a sliding bearing.
  • a table saw has a drive motor and a saw blade which can be driven by the drive motor, the saw blade projecting upwards in front of a passage opening of a workpiece contact surface, for example a saw table, in the use position of the table saw.
  • the saw blade and the workpiece, which rests on the workpiece contact surface, can be guided relative to one another.
  • the saw blade can be moved relative to the workpiece or the workpiece relative to the saw blade, so that in any case the saw blade cuts into the workpiece along a working direction.
  • the table saw is a so-called pull saw, i.e. that the saw blade is arranged on a saw unit, which can be pulled along the workpiece contact surface, for example the saw table, using a guide device.
  • the saw blade is covered by a protective cover according to the invention.
  • a closure device which is arranged laterally next to at least one flat side of the saw blade and is movable with respect to the saw blade and the workpiece contact surface, for at least partially closing the passage openings.
  • the closure device comprises, for example, a plate body or adjustment body or closure body which, as it were, closes the passage opening.
  • the closure device for example, the space between the saw blade and the saw table is further closed or better closed than without the closure device. This prevents an operator's finger or any other object from getting into the space between the saw blade and the saw table, at least into the passage opening.
  • the closure device allows a play in the movement of the saw blade, that is to say that the closure device does not rest against the saw blade, even if it is adjusted to a protective position closing the passage opening.
  • the protective closure device In this protective position, the protective closure device is expediently loaded by a spring arrangement. The locking device is thus automatically moved into the protective position, so to speak.
  • the protective device extends along the entire longitudinal length of the saw blade and / or the passage opening.
  • the saw blade can expediently be mounted so that it can be inclined about a pivot axis parallel to the working direction. It is particularly preferred if the closure device follows a pivoting movement of the saw blade about the pivot axis or is carried along by a corresponding entrainment. It is preferred if the closure device is arranged on a saw unit of the table circular saw, which is mounted to be movable relative to the workpiece contact surface, for example inclined and / or adjustable along the working direction.
  • the saw unit is mounted in the manner of a carriage or a carriage on a frame or housing of the table saw in a longitudinally movable manner along the working direction.
  • the locking device is expediently arranged on such a carriage or carriage and / or forms part of the saw unit.
  • the saw blade is mounted so as to be linearly displaceable along the working direction with respect to the workpiece contact surface.
  • a table saw 10 is suitable for sawing a workpiece W, for example a wooden workpiece.
  • a saw upper part 15 is arranged on a frame 11 of the table saw 10, which has feet 12.
  • the feet 12 can for example be supported on an underground with additional supports 13.
  • the supports 13 are fastened to the feet 12, for example, by means of clamping screws or similar other fastening means and can be fitted in one Figure 1 shown spread position or support position are adjusted where they are supported on the ground in addition to the free end regions of the feet 12.
  • the feet 12 can be connected to one another by cross struts 12A.
  • the upper saw part 15 could be set up with its own support elements 17, namely support feet or the like, directly on a surface.
  • the support elements 17 are shorter than the feet 12, so that the upper saw part 15 placed directly on the base is closer to the base 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.
  • fastening means 14 in particular clamping screws, bolts or the like.
  • the upper saw part 15 has a housing 16, from which the support elements 17 protrude.
  • a saw unit 24 with a drive motor 26 and a saw blade 25 driven or driven by the drive motor 26 is movably supported between side walls 18 of the housing 16.
  • the saw unit 24 is arranged below a guide plate 19 of the upper saw part 15.
  • the guide plate 19 On its upper side, the guide plate 19 has a workpiece contact surface or guide surface 22 on which the workpiece W can be guided or on which the workpiece W can be placed in order to introduce a saw cut into the workpiece W using the saw blade 25.
  • the saw unit 24 can be inclined about a pivot axis S by means of a tilting device 20.
  • the saw unit 24 is in Figure 1 only indicated schematically, in Figure 10 however visible in the cut.
  • the inclination device 20 comprises an arcuate guide 27, in which a guide follower or guide follower, not shown in the drawing, for example an adjusting wheel, in particular a gearwheel, slides or runs. If an adjusting wheel or gear is provided is expediently rotatable using an actuating handle 21, in particular a handle.
  • the respective pivot 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 using a fixing device, for example a clamping device, locking device or the like.
  • the fixing device can be actuated using an actuation handle 28.
  • a height at which the saw blade 25 protrudes in front of the workpiece contact surface 22 can be adjusted by means of a height adjustment device 29, from which in FIG Figure 1 only a handwheel or other operating handle is visible.
  • the orientation of the saw blade 25 to the workpiece contact surface 22 is not only in relation to the inclined position or miter position, i.e. a pivoting position about the pivot axis S, but also in relation to a height H with which the saw blade 25 in front of the workpiece contact surface 22 is upward protrudes, adjustable.
  • the position of the saw blade 25 with respect to a longitudinal axis L can also be adjusted because the saw unit 24 and thus also the saw blade 25 are / are mounted on a longitudinal adjustment device 30 so as to be displaceable along the longitudinal axis L with respect to the upper saw part 25 or the workpiece contact surface 22.
  • the longitudinal adjustment device 30 is only partially visible in the drawing.
  • the saw unit 24 can be displaced with respect to the guide plate 19 by means of an actuating handle 31, for example a handle, so that the saw blade 25 travels in the passage opening 23 and can cut into the workpiece W.
  • the workpiece W can be adjusted relative to the saw blade 25 on the workpiece contact surface 22 along a working direction A1 or the saw blade 25 can be adjusted relative to the workpiece W using the longitudinal adjustment device 30 along a working direction A2.
  • a cutting section 32 lying at the front in the working direction A1 or A2 cuts into the workpiece W.
  • saw teeth 34 are arranged or other cutting means which cut a saw slot into the workpiece W.
  • the saw blade 25 penetrates, partly also with its flat sides 33, into a saw slot 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 riving knife 35, which is arranged behind the saw blade 25 in the working direction A1, A2.
  • the riving knife 35 is fastened to the saw unit 24 so that it follows the positioning movements of the saw blade 25 or of the saw unit 24, in particular the inclined movements about the pivot axis S or the height adjustment in relation to the height H.
  • the riving knife 35 is attached with the aid of fastening means 36 the saw unit 24 connected.
  • Fastening means 36 show screw openings 37 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 component which is stationary with respect to the saw unit 24.
  • a holding projection (not shown) of the saw unit 24 expediently engages in a holding receptacle 38 on the riving knife 35.
  • the holding receptacle 38 comprises, for example, an elongated hole or a longitudinal slot or another passage opening.
  • a rear section 40 of the saw blade 25 in the working direction A1 or A2 is covered by the riving knife 35.
  • the riving knife 35 namely has an inner circumferential contour 39 which is circular and runs at a small distance along the outer circumference or along the saw teeth 34.
  • the saw blade 25 is covered on its circumference, so to speak, on its rear portion 40 in the working direction A1 or A2, which reduces the risk of injury.
  • the splitting wedge 35 extends from this aforementioned rear section 40 of the saw blade 25 to the apex region 41 of the saw blade 25, which protrudes the furthest in front of the workpiece contact surface 22. If the saw blade 25 is only protected with the riving knife 35, so to speak, both the front cutting section 32 and the apex area 41 are free-standing, which on the one hand enables the table saw 10 to be used conveniently and thus allows the workpiece W to be machined cheaply , on the other hand involves a certain security risk.
  • the passage opening 23, that is to say an elongated slot on the guide plate 19, is relatively wide in order to enable the miter position or inclined position of the saw unit 24 with respect to the pivot axis S.
  • an intervention by the operator is shown as an example by a test probe F in Figure 5 prevented from the bottom in the area of the passage opening 23 by a closure device 50.
  • the locking device 50 comprises a locking element 53 which is movably mounted on a pivot bearing 51, of which a pivot axis 52 (for example an axle body) is shown.
  • the locking element 53 preferably has an elongated shape and extends along one of the flat sides 33 of the saw blade 25.
  • the locking element 53 which could also be referred to as a closure body, is represented by a spring arrangement 54 in a closing position at least partially closing the passage opening 23, shown in FIGS Figures 10 and 11 , spring-loaded.
  • the test element or the test probe F cannot pass a free end region of the closure element 53 in the direction of the saw blade 25, see here Figure 11 .
  • the test element or the test probe acts even more in a position which locks the closure element 53 in the direction of the closed position, that is to say the position which hinders the passage opening 23 or access to the saw blade 25.
  • the saw blade 25 can nevertheless be freely positioned with respect to the passage opening 23 without the closure device 50 being in the way. This can be seen, for example, from the miter position of approximately 45 degrees with respect to the pivot axis S in Figure 12 .
  • the sawing unit 24 is adjusted furthest upward with respect to the workpiece contact surface 22, so that the closure element 53 arranged on the underside of the guide plate 19 must yield to this adjustment movement.
  • 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 coordinated with respect to the saw unit 25.
  • the leg spring 55 is penetrated by the pivot axis 53.
  • the protection on the top side, as it were, with respect to the workpiece contact surface 22 is provided in the table saw 10 by a protective cover 60.
  • the protective cover 60 comprises an upper side protective device 61 which is fastened to the riving knife 35.
  • the riving knife 35 thus forms a holding device 45.
  • the upper side protection device 61 can be detachably fastened using fastening means 46.
  • the splitting wedge 35 forms a support body 43.
  • a hook receptacle 47 and a locking receptacle 48 are provided on a free end region of the support body 43 or the splitting wedge 35, with which the top-side protective device 61 can be brought into engagement.
  • the top protection device 61 is designed like a hood or forms a cover 62.
  • the cover 62 is in two parts and has, for example, matching hood parts 63A, 63B which are screwed together using screws. Screw domes 64 are shown by way of example.
  • the cover hood 62 has an upper side wall 66 from which side walls 65 extend. At the area facing away from the upper side wall 66, a penetration opening or entry opening 67 is provided, into which, for example, suction air and / or the saw blade 25 can penetrate.
  • the inlet opening 67 extends from a front, free end region 68, which is assigned to the cutting section 32, to an end region 69, rearward in the working direction A1 or A2, of the cover hood 62 or the upper side protection device 61, on which the upper side protection device 61 is fixed to the holding device 45 .
  • the end regions 68, 69 thus extend from the cutting section 32 to the rear section 40 of the saw blade 25.
  • the top-side protective device 61 thus effectively covers the upper, free vertex region 41 of the saw blade 25.
  • exhaust air can flow up to the rear end region 69, where an exhaust connection 70 is arranged.
  • a suction device AS in particular with a suction pipe SR, can be connected to the suction connection 70.
  • the suction connection 70 comprises, for example, a suction connection for connecting an especially flexible suction pipe SR.
  • a receptacle 72 for the support body 43 of the holding device 45 is provided on the end region 69 of the upper side protective device 61 which is at the rear in the working direction A1, A2.
  • 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.
  • the upper side protective device 61 can thus be hooked into the hook receptacle 47 with the hook body 73, which is shown in FIG Figure 9 is indicated. Then the locking receptacle 48, for example a passage opening, comes to lie in the area of a locking bolt 75 of the upper side protection device 61 and is aligned therewith, 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 protective device 61 on the holding device 45 is already realized.
  • the locking bolt 75 and the locking receptacle 48 overall form a locking device 148.
  • the locking device 148 can not only represent a lock, but also form a clamping device at the same time.
  • the locking bolt 75 can namely be screwed to a screw receptacle of the upper side protection device 61 or the holding device 45 using an actuating handle 76, for example a rotary knob.
  • the locking bolt 75 can be screwed into a screw receptacle on the hood part 63A until the top-side protection device 61 is in the press fit with the holding device 45 or is clamped with the holding device 45.
  • the front end region 68 of the upper side protection device 61 projects in front of the cutting section 62, see in particular Figure 4 , so that only a workpiece with a predetermined height can be inserted into the space between the workpiece contact surface 22 and the upper side protection device 61.
  • the resulting chip material is effectively sucked through the cover hood 62 in the direction of the suction connection 70 or can be suctioned there, which enables comfortable and safe working.
  • the protective cover 60 namely in the form of an adjusting protective body 80, on which in turn adjusting protective bodies 81A and 81B are adjustably mounted.
  • the adjusting protective bodies 80, 81A and 81B form an adjusting protective body arrangement 180.
  • the adjusting 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 top protective device 61, is at least partially accommodated.
  • the cover hood 82 comprises hood parts 83A, 83B which are connected to one another.
  • Screw domes 84 are shown as examples and are screwed into the screws are.
  • the covers 62 and / or 82 could also be one-piece components, that is to say they could not consist of two partial covers or cover parts.
  • the cover hood 82 has side walls 25 which extend away from an upper side wall 86.
  • the top wall 86 and the top wall 66 face each other.
  • the side walls 65, 85 lie opposite one another and in particular abut one another, at least partially.
  • An entry opening 87 is provided between the side walls 85, into which the saw blade 25 can penetrate.
  • a front end region 88 of the adjustment protective body 80 projects in front of the front end region 68 of the upper side protection device 61 in the working direction A1 or A2.
  • the adjusting protective body 80 is mounted so that it can move with respect to the upper side protective device 61 and / or the workpiece contact surface 22, in particular the holding device 45, by means of an adjusting device 90.
  • the adjusting device 90 comprises, for example, an axle body 91, in particular a screw section of a clamping screw 92, which passes through the cover hoods 61, 82.
  • the clamping screw 82 can be actuated using an actuating handle 93.
  • the adjustment protective body 80 can pivot about a pivot axis X1 relative to the upper side protective device 61.
  • 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 protective device 61.
  • the clamping screw 92 forms part of a clamping device or a fixing device.
  • the workpiece W can cover the hood 82, and thus the adjustment protective body 80, for example, from a Figures 3 and 5 shown cover position V in the direction of a Figure 4 Adjust release position F shown.
  • the adjustment protective body 80 In the position V, a penetration area 44 of the saw blade 25 provided for sawing into the workpiece W is essentially free.
  • the penetration area 44 is in the cover position V is at least partially covered by the adjustment protective body 80.
  • the side surfaces or flat sides 33 of the saw blade 25 close to the cutting section 32 can be covered by the adjustment protective body 80.
  • the clamping screw 92 forms part of a clamping device 392 or a fixing device 290.
  • a favorable view of the cutting area into the workpiece W and / or the cutting section 32 is made possible by 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 on the top wall 66, for example.
  • the window 94 is present, for example, on the top wall 86.
  • the adjustment protective bodies 81A, 81B comprise, for example, wall bodies 185 which are arranged in parallel or on the side walls 85.
  • the wall bodies 185 are plate-like.
  • the wall bodies 185 have a surface area such that they can essentially cover the flat sides 33 of the saw blade 25.
  • the adjusting protective bodies 81A, 81B are adjustably mounted on the basis of adjusting devices 190.
  • the adjusting devices 190 are arranged on the adjusting protective body 80.
  • the adjustment devices 90, 190 are provided on opposite end regions of the protective cover 60. While the adjusting device 90 is provided at the rear end region 89 of the adjusting protective body 80, so that it can be pivoted forwards downwards (based on the working direction A1 or A2), or at least forwards in the direction of the cutting section 32, so to speak, the adjusting devices 190 provided at the front end region 88.
  • 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.
  • the adjusting protective body 80 is adjusted to the cover position V, while the adjusting protective body 81 is still in the release position F.
  • the penetration area 44 is covered in its front section, close to the cutting section 32. The operator is effectively protected. If the workpiece W and the saw blade 25 are now moved relative to one another in the working directions A1 or A2, the workpiece W can slide along the sliding slope 95 and thus the movable cover, namely the adjustment protective body 80 from the penetration area 44 and in particular from the cutting section 32 move away so that the workpiece W can be sawn.
  • the adjustment protective body is typically used 81A is present because the pivotability about the pivot axis S is only given in one direction, for example when the user is looking at the cutting section 32 in a pivoting direction downward to the right.
  • the adjustment device 190 comprises, for example, a pivot bearing 191, which is provided by an axle body, for example a bolt, a screw or the like.
  • the pivot bearing 191 is arranged at the front end region 188 of the adjustment protective 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 device 90 or its axis body 91, which forms a pivot bearing, are parallel to one another and run transversely, in particular at right angles, to the working direction A1, A2.
  • the workpiece W can actuate the adjustment protection bodies 81A, 81B from the covering position V into the release position F, namely by providing a sliding slope 195 on both adjustment protection bodies 81A, 81B.
  • the workpiece can slide along the sliding bevel 195 and also on a lower edge region 194 of the wall body 185 in order to actuate it in the direction of the release position F, which it holds there.
  • the adjustment protective body 81A, 81B in the release position F.
  • a latching namely that a latching projection or latching element 192 of the adjusting protective body 81A, 81B engages in a latching receptacle or a counter-latching contour 193 on the adjusting protective body 180.
  • the locking contours 192, 193 are provided on the side walls 85 and on the wall body 185.
  • the latching contours 192, 193 form a latching device 292 overall.
  • a plurality of latching contours could also be provided around the adjustment protective body 81A, 81B to lock in any position between the release position F and the cover position V and intermediate positions.
  • locking is also advantageous and is provided in the exemplary embodiment, namely that a locking contour 292, for example designed as a hook receptacle or locking receptacle, is provided on the adjusting protective body 81A, 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.
  • each of the adjustment protection bodies 81A, 81 B is expediently guided on the adjustment protection body 80 by means of a guide.
  • the guide comprises, for example, a guide projection 197 which engages in a guide receptacle 198, for example a guide link.
  • the guide receptacle 198 is also still part of an arrangement of a plurality of external air openings 199, which the adjustment protective body 81A, 81B preferably has.
  • the distances or the passage openings of the external air openings 199 are, however, comparatively small or narrow in such a way that an operator's finger does not fit through, so that he is protected against injuries from 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 as far as possible from the pivot bearing 191.
  • 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 bodies 80, 81A, 81 B is facilitated by operating handles or handles 96, 196.
  • the handle 96 projects 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 lug.
  • the handles 196 are, for example, handle elements, handle projections or the like which protrude at an angle from the wall bodies 185.
  • the external air openings 199 form a grid 299, for example.
  • the dust air SL can flow from the side to the saw blade 25 through the external air openings 99, 199, so that it then passes through the inlet opening 87 and the inlet opening 67 into the interior of the protective cover 60 and can ultimately be suctioned off through the suction nozzle 71 or suction connection 70 .
  • the flow behavior or suction behavior is optimized. A favorable flow situation arises below the protective cover 60 during suction at the suction connection 70, in which the vacuum conditions are optimally set.
  • the adjustment protective bodies 81A, 81B form side surface protective bodies 182.
  • the adjusting protective bodies 81A, 81B or both adjusting protective bodies 81A, 81B could be mounted directly on the upper side protective device 60, but this is not shown in the drawing.
  • the adjusting device 190 in particular its screw connection or screw bolt or bearing bolt, 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, so to speak, nested one inside the other. On the one hand, this has advantages in terms of covering the saw blade 25, that is to say in terms of protecting the operator.
  • the suction is also optimal. Thus, cover 62 and cover 82 form suction hoods 78, 98.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)

Claims (15)

  1. Recouvrement de protection pour une scie circulaire à table (10), qui présente un moteur d'entraînement (26) ainsi qu'une lame de scie (25) pouvant être entraînée par le moteur d'entraînement (26), dans lequel la lame de scie (25) fait saillie par une section devant une face d'appui de pièce (22) de la scie circulaire à table (10), dans lequel la lame de scie (25) et la pièce (W), quand elle repose au niveau de la face d'appui de pièce (22), peuvent être guidées l'une par rapport à l'autre de sorte que la lame de scie (25) réalise une entaille dans la pièce (W) le long d'une direction de travail (A1, A2), dans lequel le recouvrement de protection (60) présente un système de protection de côté supérieur (61), lequel peut être fixé ou est fixé de manière stationnaire au niveau de la scie circulaire à table (10) à l'aide d'un système de maintien (45) et recouvre, dans l'état monté au niveau de la scie circulaire à table (22), une zone de sommet (41) de la lame de scie (25) faisant saillie devant la face d'appui de pièce (22) de la lame de scie à table (10) jusqu'à une section de coupe (32), avant par rapport à la direction de travail (A1, A2), prévue pour réaliser une entaille dans la pièce (W), de la lame de scie (25), dans lequel le système de protection de côté supérieur (61) recouvre la lame de scie (25) seulement en partie de sorte qu'une zone d'introduction (44), prévue pour faire pénétrer la lame de scie (25) dans la pièce, de la lame de scie (25), en particulier au moins une zone partielle de la section de coupe (32) avant de la lame de scie (25), reste dégagée, caractérisé en ce que
    le recouvrement de protection (60) présente un ensemble de corps de protection d'ajustement (180) avec au moins un corps de protection d'ajustement (80, 81A, 81B) pouvant être ajusté à l'aide d'au moins un système d'ajustement (90, 190) par rapport au système de protection de côté supérieur (61) entre une position de recouvrement (V) recouvrant au moins en partie la zone de pénétration (44) de la lame de scie (25) et une position de dégagement (F) dégageant la zone de pénétration (44) de la lame de scie (25) dans une périphérie plus grande par rapport à la position de recouvrement (V), dans lequel le système de protection de côté supérieur (61) et l'au moins un corps de protection d'ajustement (80, 81A, 81B) sont configurés en tant que capots de recouvrement (62, 82) ou présentent un capot de recouvrement et forment un agencement capot dans capot.
  2. Recouvrement de protection (60) selon la revendication 1, caractérisé en ce que l'au moins un système d'ajustement (90, 190) est disposé entre le système de protection de côté supérieur (61) et l'au moins un corps de protection d'ajustement (80, 81A, 81B) et l'au moins un corps de protection d'ajustement (80, 81A, 81B) est monté de manière à pouvoir être ajusté au niveau du système de protection de côté supérieur (61), ou que l'au moins un système d'ajustement (90, 190) est disposé entre le système de maintien (45) et le corps de protection d'ajustement (80, 81A, 81B) et l'au moins un corps de protection d'ajustement (80, 81A, 81B) est monté de manière à pouvoir être ajusté par rapport au système de maintien (45).
  3. Recouvrement de protection selon la revendication 1 ou 2, caractérisé en ce que l'ensemble de corps de protection d'ajustement (180) présente un premier corps de protection d'ajustement (80), qui est monté de manière à pouvoir être ajusté avec un premier système d'ajustement (90) au niveau du système de maintien (45) ou du système de protection de côté supérieur (61), et au moins un deuxième corps de protection d'ajustement (81A, 81B), qui est monté de manière à pouvoir être ajusté au niveau du premier corps de protection d'ajustement (80) à l'aide d'un deuxième système d'ajustement (190).
  4. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'elle présente au moins deux corps de protection d'ajustement (80, 81A, 81B), qui sont montés de manière à pouvoir être ajustés, en particulier de manière à pouvoir être pivotés, à l'aide de systèmes d'ajustement (90, 190) disposés au niveau de zones d'extrémité (89, 88) opposées les unes aux autres du recouvrement de protection (60), en particulier du système de protection de côté supérieur (61), et/ou que le système de protection de côté supérieur (61) et/ou l'au moins un corps de protection d'ajustement (80, 81A, 81B) sont configurés sous la forme d'un capot de recouvrement (62, 82) ou présentent un capot de recouvrement (62, 82).
  5. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il présente un capot de recouvrement (82) avec un espace de réception servant à recevoir l'au moins un corps de protection d'ajustement (80, 81A, 81B) et/ou le système de protection de côté supérieur (61) et/ou un autre capot de recouvrement (62, 82).
  6. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que l'au moins un corps de protection d'ajustement (80, 81A, 81B) comprend au moins un corps de protection de face latérale (182), en particulier de type panneaux, servant à recouvrir un côté plat (33) de la lame de scie (25) ou est formé par l'au moins un corps de protection de face latérale (182), et/ou que l'au moins un corps de protection d'ajustement (80, 81A, 81B) comprend un capot de recouvrement (62), au niveau duquel au moins un corps de protection de face latérale (182) servant à recouvrir un côté plat (33) de la lame de scie (25) est disposé en particulier en étant monté de manière mobile.
  7. Recouvrement de protection selon la revendication 6, caractérisé en ce qu'il comprend des corps de protection de face latérale (182) se faisant face les unes les autres, entre lesquels un espace de réception est prévu pour la lame de scie (25).
  8. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de protection de côté supérieur (61) et/ou l'au moins un corps de protection d'ajustement (80, 81A, 81B) sont configurés en tant qu'un capot d'évacuation par aspiration (78, 98) ou présentent un capot d'évacuation par aspiration (78, 98), et/ou qu'ils présentent un capot d'évacuation par aspiration (78, 98) ou un capot de recouvrement (62) configuré et/ou disposé pour recouvrir une zone de sommet (41) supérieure de la lame de scie (25).
  9. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un raccord d'évacuation par aspiration (70) pour un système d'évacuation par aspiration (AS), en particulier une tubulure d'évacuation par aspiration (71) servant au raccordement d'un tuyau d'évacuation par aspiration (SR), est disposé au niveau du système de protection de côté supérieur (61) et/ou de l'au moins un corps de protection d'ajustement (80, 81A, 81B).
  10. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de protection de côté supérieur (61) et/ou l'au moins un corps de protection d'ajustement (80, 81A, 81B) présentent au moins une ouverture pour air extérieur (99 ; 199), en particulier un ensemble de plusieurs ouvertures pour air extérieur (99 ; 199) ou une grille (299), servant à faire affluer de l'air extérieur dans la zone de la lame de scie (25), et/ou qu'est disposée au niveau du système de protection de côté supérieur (61) et/ou au niveau de l'au moins un corps de protection d'ajustement (80, 81A, 81B) une pente de glissement (78, 95), le long de laquelle la pièce (W) peut glisser pour ajuster le système de protection de côté supérieur (61) ou le corps de protection d'ajustement (80, 81A, 81B) de manière à s'éloigner de la lame de scie (25).
  11. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il présente au moins deux corps de protection d'ajustement (80, 81A, 81B), qui peuvent être actionnés l'un par rapport à l'autre, en particulier à l'aide d'une pente de glissement (78, 95), en particulier par la pièce (W), et/ou qu'est disposée au niveau du système de protection de côté supérieur (61) et/ou au niveau de l'au moins un corps de protection d'ajustement (80, 81A, 81B), une fenêtre (77, 94), par laquelle la lame de scie (25), en particulier une zone avant et/ou supérieure, tournée vers l'utilisateur, de la lame de scie (25), est visible.
  12. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce que le système de maintien (45) comprend un départoir (35) et/ou un corps d'appui (43) disposé dans la direction de travail (A1, A2) derrière la lame de scie (25) et passant dans une entaille de sciage (ZS), sciée par la lame de scie (25), de la pièce (W) ou est formé par ceux-ci, et/ou que le système de maintien (45) présente au moins un corps de crochet (73) ou un logement de crochet (47) destiné à être accroché avec le système de protection de côté supérieur (61) et/ou au moins un système de verrouillage (148), en particulier une vis, servant à verrouiller le système de protection de côté supérieur (61).
  13. Recouvrement de protection selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il présente un système de blocage (290), en particulier un système d'enclenchement (292) avec au moins un cran (192) et/ou un système de serrage (392) avec au moins une attache, servant à bloquer, en particulier à enclencher, l'au moins un corps de protection d'ajustement (80, 81A, 81B) dans la position de recouvrement (V) et/ou la position de dégagement (F), et/ou que le système d'ajustement (90, 190) comprend au moins un palier pivotant (191) ou est formé par celui-ci.
  14. Scie circulaire à table (10) avec un recouvrement de protection selon l'une quelconque des revendications précédentes, ainsi qu'avec un moteur d'entraînement (26) ainsi qu'une lame de scie (25) pouvant être entraînée par le moteur d'entraînement (26), dans laquelle la lame de scie (25) fait saillie en position d'utilisation de la scie circulaire à table (10) vers le haut à travers une ouverture de passage (23) de la face d'appui de pièce (22), dans laquelle la lame de scie (25) et la pièce (W), quand elle repose au niveau de la face d'appui de pièce (22), peuvent être guidées l'une par rapport à l'autre de sorte que la lame de scie (25) réalise une entaille le long d'une direction de travail (A1, A2) dans la pièce (W), caractérisée en ce que la lame de scie (25) est recouverte par un recouvrement de protection (60) selon l'une quelconque des revendications précédentes, et/ou qu'un système de fermeture monté de manière mobile par rapport à la lame de scie (25) et à la face d'appui de pièce (22) servant à fermer au moins en partie l'ouverture de passage (23) est disposé au niveau de l'ouverture de passage (23) latéralement à côté d'au moins un côté plat (33) de la lame de scie (25).
  15. Scie circulaire à table (10) selon la revendication 14, caractérisée en ce que le système de fermeture est contraint par ressort dans une position de protection fermant l'ouverture de passage (23) par un ensemble de ressorts, et/ou présente par rapport à la lame de scie (25) systématiquement une distance, et/ou que le système de fermeture s'étend le long de la totalité de la longueur de la lame de scie (25) et/ou de l'ouverture de passage (23), et/ou que la lame de scie (25) est montée de manière à pouvoir être réglée à l'oblique autour d'un axe de pivotement parallèle par rapport à la direction de travail (A1, A2), et/ou que la lame de scie (25) est montée de manière à pouvoir coulisser linéairement par rapport à la face d'appui de pièce (22) le long de la direction de travail (A1, A2).
EP18169284.9A 2017-05-22 2018-04-25 Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection Active EP3424656B1 (fr)

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DE102017111070.4A DE102017111070A1 (de) 2017-05-22 2017-05-22 Schutzabdeckung für eine Säge und damit ausgestattete Säge

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EP20164278.2A Division-Into EP3705249A1 (fr) 2017-05-22 2018-04-25 Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection

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US20070056416A1 (en) * 2005-09-15 2007-03-15 Makita Corporation Cutting devices
US20090084240A1 (en) * 2007-10-01 2009-04-02 Gass Stephen F Table saw guards, splitter assemblies, accessories, and table saws including the same

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US3249134A (en) * 1964-01-30 1966-05-03 Wilton Corp Saw and dado guard
US4614140A (en) * 1984-05-31 1986-09-30 Macksoud Albert A Safety device for rocking arm saw
US5822864A (en) * 1996-05-31 1998-10-20 Black & Decker, Inc. Viewing window for circular saw guard
DE102006014647B4 (de) * 2006-03-28 2016-06-09 Otto Martin Maschinenbau Gmbh & Co. Kg Bearbeitungsmaschine, insbesondere Kreissäge
DE102006055018B3 (de) * 2006-11-22 2007-10-31 Metabowerke Gmbh Tischkreissäge
CN201833435U (zh) * 2009-10-23 2011-05-18 王长江 木工台锯上的活动防护罩装置
CN201783703U (zh) * 2010-08-06 2011-04-06 浙江世达工具制造有限公司 复合锯台切式台面防护罩
CN103963169B (zh) * 2013-02-02 2016-04-20 南京搏峰电动工具有限公司 台锯
EP2969424B1 (fr) * 2013-03-12 2018-02-21 Robert Bosch GmbH Scie à table avec système de détection de protection
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US1082870A (en) * 1912-11-20 1913-12-30 John W Humason Saw-guard.
GB207983A (en) * 1922-11-16 1923-12-13 William Lawes Cole Improved construction of guard for circular saws
US20070056416A1 (en) * 2005-09-15 2007-03-15 Makita Corporation Cutting devices
US20090084240A1 (en) * 2007-10-01 2009-04-02 Gass Stephen F Table saw guards, splitter assemblies, accessories, and table saws including the same

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DE102017111070A1 (de) 2018-11-22
EP3424656A1 (fr) 2019-01-09

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