EP3705249A1 - 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
EP3705249A1
EP3705249A1 EP20164278.2A EP20164278A EP3705249A1 EP 3705249 A1 EP3705249 A1 EP 3705249A1 EP 20164278 A EP20164278 A EP 20164278A EP 3705249 A1 EP3705249 A1 EP 3705249A1
Authority
EP
European Patent Office
Prior art keywords
saw blade
protective
saw
workpiece
upper side
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.)
Pending
Application number
EP20164278.2A
Other languages
German (de)
English (en)
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
Original Assignee
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
Publication of EP3705249A1 publication Critical patent/EP3705249A1/fr
Pending legal-status Critical Current

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Classifications

    • 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 that has a drive motor and a saw blade that can be driven by the drive motor, the saw blade protruding with a section in front of a workpiece contact surface of the table saw, the saw blade and the workpiece relative to one another when it is in contact with the workpiece contact surface can be guided so that the saw blade cuts into the workpiece along a working direction
  • the protective cover having an upper side protective device which can be or is fixed in place on the table saw using a holding device and, when mounted on the table saw, a vertex area of the table saw in front of the workpiece contact surface the above saw blade up to a cutting section of the saw blade which is at the front with respect to the working direction and which is provided for cutting into the workpiece, the upper side protective device only partially covering the saw blade so that a penetration area of the saw blade provided for the penetration of the saw blade into the workpiece, in particular at least a partial area of the front cutting section of the saw blade, remains free.
  • Such a protective cover is known, for example, from the Festool circular table saw of the CS50 type, in the form of a cover hood and suction hood.
  • the protective cover covers the top part of the saw blade.
  • the protective cover usually projects in front of the saw blade in the working direction, so that the operator is protected from injury. Areas of the saw blade remain free, however, so that it is free for cutting into the workpiece or is at least partially free.
  • the object of the present invention is to provide a protective cover with an improved protective effect.
  • a protective cover of the type mentioned at the outset provides for an adjustable protective body arrangement with at least one, based on at least one adjustment device, between a cover position that at least partially covers the penetration area of the saw blade and a penetration area of the saw blade in one compared to the cover position having a larger scope releasing release position adjustable adjustment protective body.
  • the protective cover has one or more adjustable protective bodies, that is to say an adjustable protective body arrangement.
  • the adjustable protective bodies can be adjusted relative to the upper side protective device and / or the workpiece contact surface, so that in a covering position they cover the penetration area of the saw blade to a greater extent than in a release position. In the covering position, parts of the penetration area can be completely or essentially 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 can for example comprise sliding bearings, pivot bearings or both.
  • a transmission 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 are arranged.
  • the saw unit is preferably stationary or linearly displaceable 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 of the table saw that carries the saw blade, is expediently pivotable with respect to the workpiece contact surface about a pivot axis running parallel to the working direction.
  • the saw blade preferably protrudes 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 in a central position or normal position at a right angle to one another.
  • the upper side 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 protective device and / or the at least one adjustable protective body advantageously extend from an area of the saw blade that is front in the working direction to a rear area 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 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 adjustable protective body can also comprise a protective grille or a grille body, or be formed thereby.
  • the at least one adjustable protective body is preferably adjustable in relation to a position that essentially completely covers a flat side of the saw blade at least close to the cutting section.
  • At least one adjustment device or the at least one adjustment device is preferably arranged between the upper side protection device and the at least one adjustment protection body, so that the adjustment protection body is adjustably mounted on the upper side protection device. If, for example, the upper side protective device is removed from the table saw, the adjustable protective body arrangement is removed from the saw at the same time. Even if the upper-side protective device is mounted so as to be adjustable, in particular pivotable, relative to the saw blade or the workpiece contact surface, the adjustable protective body arrangement also makes this movement.
  • the top protection device is connected to a saw unit that drives the saw blade or is arranged on a saw unit that is adjustable relative to the workpiece contact surface, for example in an inclined bearing and / or along a longitudinal axis.
  • the adjustment support body arrangement arranged on the upper side protection device then moves, so to speak, simultaneously with the saw unit.
  • the upper side protective device it is possible for the upper side protective device to be stationary and not adjustable with respect to the saw blade. It is also possible, however, for the upper side protection device to be adjustable relative to the saw blade and for the adjustment support body arrangement arranged thereon to take part in the adjustment of the upper side protection device, so to speak.
  • Another measure can be that the at least one adjusting device is arranged between the holding device and the adjustable protective body and the adjustable protective body is mounted so as to be adjustable with respect to the holding device.
  • This arrangement makes it possible in particular that the adjustable protective body can be movably supported independently of the upper side protective device.
  • several adjustable 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 adjustment protective body is arranged on the holding device and is mounted adjustably with respect to the holding device by means of an adjusting device arranged on the holding device.
  • adjustment protective bodies are movably mounted on one another.
  • the adjustable protective body arrangement has a first adjustable protective body which is adjustably mounted with a first adjusting device on the holding device or the upper side protective device, and has at least one second adjustable protective body, which in turn has is adjustably mounted on the first adjustment protection body by means of a second adjustment device.
  • the first adjustable protective body can be pivotably and / or movably mounted on the holding device, so that the second protective body takes part 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 adjustable protective body is, for example, pivotably movable, linearly movable or both mounted on the first adjustable 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 at the front in the working direction and the other adjustment device is arranged at the rear in the working direction.
  • a pivot bearing is preferred in each case.
  • the pivot axes of the adjustment 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 supported with the first, aforementioned adjustment device with respect to the holding device or the top protection device .
  • An embodiment is preferred in which the upper side protection device and / or the at least one adjustment protection body are designed as a cover hood or has a cover hood.
  • a cover hood can cover, for example, side surfaces or flat sides of the saw blade as well as an apex area or a radial outer circumference.
  • the at least one adjustable protective body has a cover hood with a receiving space for receiving the upper side protective device.
  • This upper side protection device can also be designed as a cover which engages in the cover of the adjustment protection body.
  • the upper side protective device has a cover hood which comprises a receiving space for receiving the at least one adjustable protective body. It is possible for a plate-like protective body or a plate-like protective device to be received in the covering hood or the receiving space of the covering hood.
  • the at least one adjustment protective body expediently has at least one side surface protective body for covering a flat side of the saw blade or is formed thereby.
  • the side surface protective body can be designed, 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 hood 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 positioned favorably. In particular, the more exposed sections of the saw blade can be conveniently covered. For example, in the case of an inclined or mitered position, one flat side of the saw blade is on the top, the other flat side on the underside. The underside flat side needs less protection. The flat side on the top, on the other hand, is exposed.
  • the side surface protective body can be adjusted in relation to this upper flat 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 it 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 one flat side of the saw blade.
  • An arrangement on that flat side is advantageous which, when the saw blade is mitered or inclined 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 each of the 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 such that they can pivot or move linearly so that they can be pivoted or displaced towards the saw blade in front of and away from the saw blade.
  • a further advantageous embodiment provides that the upper side protective device or the at least one adjustable protective body is designed as a suction hood or has a suction hood.
  • the function of the cover hood and the suction hood can be identical. It is possible that only one of the protective devices has an extraction 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 cover hood or the 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 protective device and / or the at least one adjustable protective body.
  • a suction connector for connecting a suction pipe can be provided as the suction connection.
  • the one cover hood can serve as a guide device or dust guide device for the other cover hood or suction hood.
  • the upper side protection device and / or the adjustment protective body has at least one external air opening, in particular an arrangement of several external air openings, for the inflow of external air into the area of the saw blade.
  • 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 bevel preferably runs in an arc-shaped manner around a respective pivot axis of an adjustable protective body.
  • the arch shape does not have to be circular.
  • An adjustment protection 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 pivotably mounted at one end region.
  • a respective adjustment protective body is pivotably mounted at its respective end region, so that the largest possible pivoting range is available.
  • adjustable protective bodies can of course also be pivoted or mounted pivotably and displaceably with respect to the holding device or the workpiece contact surface.
  • a slide-on bevel is expediently arranged or provided on which the workpiece can slide away from the saw blade in order to adjust the upper side protective device or the adjustable protective body.
  • the slide-on bevel can also serve to ensure that, when the protective cover is adjusted relative to the workpiece contact surface, the workpiece contact surface adjusts the upper side protection device and / or the adjustment protection body.
  • An arrangement of at least two adjustable protective bodies which can be actuated relative to one another, for example using a slide-on slope, is also advantageous.
  • the adjustable protective body can move out of the covering position depending on the impact or depending on the impact of the workpiece or their respective cover position can be adjusted into their respective release position.
  • the adjustment protective bodies can be adjusted relative to one another on the basis of the slide-on bevels. So when the workpiece first comes into contact with one adjustment protective body, it adjusts it from the covering position in the direction of its release position. When the saw blade and workpiece are adjusted further relative to one another, the other adjustment protective body is also adjusted from its respective covering position into its release position.
  • a window is expediently arranged on the upper side protective device and / or on the at least one adjustable protective body, through which the saw blade, for example an upper area of the saw blade or area facing the user, can be seen. If both the protective device and the adjustable protective body each have a window, these are expediently aligned with one another. It is particularly advantageous if an incision area or incision area of the saw blade into the workpiece can be seen through the window arrangement, in any case the at least one window.
  • 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, so to speak, be held from above or on an upper side and extend downward in the direction of the saw blade.
  • the holding device is a riving knife and / or a support body arranged in the working direction behind the saw blade and fitting into a saw slot of the workpiece that is sawn through the saw blade, or includes or is formed by such a support body.
  • the riving knife which holds apart the workpiece that has already been sawn apart, can simultaneously 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 onto 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 support body and the protective cover can be hooked to one another, this hook connection being able to be locked against loosening using a bolt, in particular a screw.
  • the hook and the hook receptacle of the hook arrangement cannot disengage.
  • the hook arrangement i. Hook and hook receptacle
  • the bolt can be brought into engagement with the holding device and the top 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 for example comprise a latching device with at least one notch and / or a clamping device with at least one clamp.
  • a guide device for guiding the adjustable protective body or the adjustable protective body between the release position and the covering position is also preferred.
  • the guide device can for example comprise a guide projection that engages in a guide receptacle.
  • the guide projection can, for example, engage in an external air opening.
  • the adjusting device expediently comprises at least one pivot bearing and / or one sliding bearing.
  • a table saw has a drive motor and a saw blade drivable by the drive motor, the saw blade protruding upwards in front of a passage opening of a workpiece contact surface, for example a saw table, in the position of use 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 can be moved 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 drawn 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 movably mounted with respect to the saw blade and the workpiece contact surface, to at least partially close the passage openings to the side of the passage opening next to at least one flat side of the saw blade.
  • the closure device comprises, for example, a plate body or adjustment body or closure body which, so to speak, closes the passage opening.
  • the intermediate space between the saw blade and the saw table is, for example, more closed or better closed than without the closure device by 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 locking device allows the saw blade to move freely, that is to say that the locking device does not rest against the saw blade, even if it is adjusted into a protective position that closes the passage opening.
  • the protective closure device is expediently loaded by a spring arrangement. In this way, the locking device is 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 as to be inclined about a pivot axis parallel to the working direction. It is particularly preferred if the locking device participates in a pivoting movement of the saw blade about the pivot axis or is carried along by a corresponding entrainment. It is preferred if the locking device is arranged on a saw unit of the table saw, which is movably supported 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 slide on a frame or housing of the table saw so that it can be moved longitudinally along the working direction.
  • the locking device is expediently arranged on such a slide or carriage and / or forms a component of the saw unit.
  • the saw blade is mounted so as to be linearly displaceable with respect to the workpiece contact surface along the working direction.
  • a table saw 10 is suitable for sawing a workpiece W, for example a wood 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 with additional supports 13 on a substrate.
  • the supports 13 are fastened to the feet 12, for example with clamping screws or similar other fastening means, and can be in an in Figure 1 shown spread position or support position are adjusted, where they are supported in addition to the free end regions of the feet 12 on the ground.
  • the feet 12 can be connected to one another by cross braces 12A.
  • the saw upper part 15 could be set up with its own support elements 17, namely support feet or the like, directly on a substrate.
  • the support elements 17 are shorter than the feet 12, so that the saw upper part 15 placed directly on the ground is closer to the ground than when it is 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 saw upper 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 drivable by the drive motor 26 is movably mounted between side walls 18 of the housing 16.
  • the saw unit 24 is arranged below a guide plate 19 of the saw upper part 15.
  • the guide plate 19 has on its upper side 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 make a saw cut in the workpiece W using the saw blade 25.
  • the saw unit 24 can be tilted 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 but visible in section.
  • the inclination device 20 comprises an arcuate guide 27 in which a guide follower or link follower, not visible in the drawing, for example an adjusting wheel, in particular a gear wheel, slides or runs. If an adjusting wheel or gear is provided is, this is expediently rotated by means of an adjusting handle 21, in particular a handle.
  • the respective pivot position of the saw blade 25 or 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 can be operated using an operating handle 28.
  • a height at which the saw blade 25 protrudes in front of the workpiece contact surface 22 can be adjusted using a height adjustment device 29, from which in FIG Figure 1 only a handwheel or some 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 at which the saw blade 25 upwards in front of the workpiece contact surface 22 protrudes, adjustable.
  • the position of the saw blade 25 in relation to a longitudinal axis L can be adjusted because the saw unit 24 and thus also the saw blade 25 is / are mounted on a longitudinal adjustment device 30 such that it can be displaced along the longitudinal axis L with respect to the saw upper 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 using an actuating handle 31, for example a handle, so that the saw blade 25 travels along the passage opening 23 and can cut into the workpiece W in the process.
  • 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 simultaneous movement of the workpiece W along the working direction A1 and the saw blade 25 along the working direction A2 is also possible.
  • a cutting section 32 located at the front in the working direction A1 or A2 cuts into the workpiece W.
  • saw teeth 34 or other cutting means that cut a saw slot into the workpiece W are arranged.
  • 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 attached to the saw unit 24 so that it takes part in the positioning movements of the saw blade 25 or the saw unit 24, in particular the inclination movements about the pivot axis S or the height adjustment in relation to the height H.
  • the riving knife 35 is provided with fasteners 36 connected to the saw unit 24.
  • screw openings 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 component that 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 some other passage opening.
  • a section 40 of the saw blade 25 that is rearward 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 rear section 40 in the working direction A1 or A2, so to speak, on the circumference, which reduces the risk of injury.
  • the riving knife 35 extends from this aforementioned rear section 40 of the saw blade 25 a little way to the apex area 41 of the saw blade 25, which protrudes the furthest in front of the workpiece contact surface 22. So if the saw blade 25 is only protected, so to speak, with the riving knife 35, both the front cutting section 32 and the apex area 41 are free-standing, which on the one hand enables convenient use of the table saw 10 and thus inexpensive workpiece machining of workpieces such as the workpiece W. , on the other hand, involves a certain security risk.
  • the passage opening 23, i.e. 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 operator can reach into the interior of the housing 16 between the side walls 18 so that he gets into the area of the saw slot or the passage opening 23, even in the area where the saw blade 25 is located.
  • an intervention by the operator shown by way of example by a test probe F in Figure 5 , prevented from the underside in the area 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 swivel axis 52 is shown (e.g. 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 53, which could also be referred to as a closure body, is shown by a spring arrangement 54 in a closing position which at least partially closes the passage opening 23, shown in FIG Figures 10 and 11 , spring-loaded.
  • the test element or the test probe F cannot reach a free end region of the closure element 53 in the direction of the saw blade 25, see in this regard Figure 11 .
  • the test element or the test probe is even more likely to act in an actuated position of the closure element 53 in the direction of the closure 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 positioned freely 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 approx. 45 degrees with respect to the pivot axis S in Figure 12 .
  • the saw unit 24 is adjusted the furthest upwards with respect to the workpiece contact surface 22, so that the closure element 53 arranged on the underside of the guide plate 19 has to 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 torsion spring 55 is penetrated by the pivot axis 53.
  • a protective cover 60 provides, so to speak, the top-side protection with respect to the workpiece contact surface 22.
  • the protective cover 60 comprises a top-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 protective device 61 can be releasably fastened using fastening means 46.
  • the riving knife 35 forms a support body 43.
  • 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 upper side protective device 61 is designed like a hood or forms a cover hood 62.
  • the cover hood 62 is in two parts and has, for example, hood parts 63A, 63B that fit together and are screwed together with 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 away. In the area facing away from the top wall 66, an 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 from a front, free end area 68, which is assigned to the cutting section 32, to a rear end area 69 of the cover 62 or the upper side protection device 61 in the working direction A1 or A2, on which the upper side protection device 61 is attached 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 upper side protective device 61 thus effectively covers the upper, free apex region 41 of the saw blade 25.
  • suction air can flow up to the rear end area 69, where a suction 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 piece for connecting a particularly flexible suction pipe SR.
  • a receptacle 72 for the support body 43 of the holding device 45 is provided on the rear end region 69 of the upper side protection device 61 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.
  • the locking receptacle 48 for example a passage opening, then comes to lie in the area of a locking bolt 75 of the upper side protective device 61 and is aligned with it, so that the locking bolt 75 can be pushed through the locking receptacle 48.
  • a positive 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 together 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 upper side protection device 61 is in a press fit with the holding device 45 or is clamped with the holding device 45.
  • the front end area 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 pushed into the space between the workpiece contact surface 22 and the upper side protective device 61.
  • the chip material that occurs is effectively sucked through the cover 62 in the direction of the suction connection 70 or can be suctioned there, which enables comfortable and safe work.
  • 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 hood 82 comprises hood parts 83A, 83B which are connected to one another. Shown as an example are screw domes 84 screwed into the screws are.
  • the covering hoods 62 and / or 82 could also be one-piece components, ie not consist of two partial covering hoods 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 are opposite one another.
  • the side walls 65, 85 also lie opposite one another and, in particular, abut one another, at least partially.
  • An inlet opening 87 is provided between the side walls 85, into which the saw blade 25 can penetrate.
  • a front end area 88 of the adjustment protective body 80 protrudes in front of the front end area 68 of the upper side protection device 61 in the working direction A1 or A2.
  • the adjustable protective body 80 is mounted movably 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 adjustment device 90 comprises, for example, an axle body 91, in particular a screw section of a clamping screw 92, which penetrates the cover hoods 61, 82.
  • the clamping screw 82 can be actuated with the aid of 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 adjustment protective body 80 relative to the upper side protective device 61.
  • the clamping screw 92 therefore forms part of a clamping device or a fixing device.
  • the workpiece W can move the cover 82, and therefore the adjustment protective body 80, from a, for example, into the Figures 3 and 5 cover position V shown in the direction of an in Figure 4 Adjust the release position F shown.
  • 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 covering position V covered at least partially 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.
  • the windows 77, 94 which are arranged on the upper side protective device 61 and the adjustment protective body 80, enable a favorable view of the incision area in the workpiece W and / or the cutting section 32.
  • the window 77 is provided on the top wall 66, for example.
  • the window 94 is provided on the top wall 86, for example. The operator can thus look through both hoods 62, 82 in the direction of the saw blade 25, which makes handling much easier.
  • the adjustable protective body 81B possibly also the further adjustable protective body 81A, which are arranged on opposite sides of the upper side protective device 61, namely in the area of the flat sides 33 of the saw blade 25, allow further flexibility with regard to the covering of the saw blade 25.
  • the adjustment protective bodies 81A, 81B comprise wall bodies 185, for example, which are arranged parallel to or on the side walls 85.
  • the wall bodies 185 are plate-like.
  • the wall bodies 185 have a surface extension such that they can essentially cover the flat sides 33 of the saw blade 25.
  • the adjustment protection bodies 81A, 81B are adjustably supported by means of adjustment devices 190.
  • the adjustment devices 190 are arranged on the adjustment protective body 80.
  • the adjustment devices 90, 190 are provided on opposite end regions of the protective cover 60. While the adjustment device 90 is provided on the rear end area 89 of the adjustment protective body 80, so that it can be pivoted downwards, so to speak, (in relation to the working direction A1 or A2), at least forwards in the direction of the cutting section 32, the adjustment devices are 190 is 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 cover position V covering the rear section in relation to the working direction A1 or A2 of the saw blade 25.
  • the adjustment protective body 80 is adjusted into the covering position V, while the adjustment protective body or bodies 81 are still in the release position F.
  • the penetration area 44 is in any case covered in its front section, close to the cutting section 32.
  • the operator is effectively protected.
  • the workpiece W and the saw blade 25 are moved relative to one another in the working directions A1 or A2, the workpiece W can slide along the slide-on bevel 95 and thus the movable cover, namely the adjustment protective body 80 from the penetration area 44 and in particular from the cutting section Move 32 away so that the workpiece W can be sawed.
  • the adjustment protective body 81A is present because the pivotability about the pivot axis S is only given in one direction, for example in a pivoting direction down to the right when the user is looking at the cutting section 32.
  • 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 on 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 adjustment device 190 and a pivot axis X1 of the adjustment device 90 or its axle 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 adjustable protective bodies 81A, 81B from the covering position V into the release position F, in that a slide-on bevel 195 is provided on both adjustable protective bodies 81A, 81B.
  • the workpiece can slide along the slide-on 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 to hold it there.
  • the adjustment protective body 81A, 81B can easily be fixed in the release position F.
  • a latching in that a latching projection or latching element 192 of the adjustment protective body 81A, 81B engages in a latching receptacle or a counter-latching contour 193 on the adjustment protective body 180.
  • the latching contours 192, 193 are provided on the side walls 85 and on the wall body 185.
  • the latching contours 192, 193 overall form a latching device 292.
  • several latching contours could also be provided around the adjustment protective body 81A, 81B to be locked in any position between the release position F and the covering position V and positions in between.
  • locking is also advantageous and is provided in the exemplary embodiment, namely by providing, for example, a locking contour 292, configured as a hook receptacle or locking receptacle, which engages with a locking contour 293, for example on the adjustment protective body 81A a hook projection or locking projection of the adjustment protective body 80 can be brought.
  • the locking contours 292, 293 are to be brought into engagement in the release position F, for example.
  • Further locking contours could easily be present so that, for example, the adjustment protective body 81A, 81B not only in the release position F, but also in the cover position V or also intermediate positions between the aforementioned positions, in which the penetration area 44 or the side surface or flat side 33 is only partially covered, can be locked.
  • each of the adjustment protective bodies 81A, 81 B is expediently guided on the adjustment protective 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 slot.
  • the guide receptacle 198 is also part of an arrangement of several 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 such that an operator's finger cannot 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, 81B is guided at the greatest possible distance 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 adjustable protective bodies 80, 81A, 81B is facilitated by operating handles or handles 96, 196.
  • the handle 96 projects upwardly in front of the top wall 86, for example in the manner of a tongue or a handle projection, so that it can be grasped as an operating nose.
  • the handles 196 are, for example, handle elements, handle projections or the like protruding at an angle from the wall bodies 185.
  • the external air openings 199 form a grille 299, for example.
  • the dust air SL can flow from the side through the external air openings 99, 199 to the saw blade 25, 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 extracted through the suction nozzle 71 or suction connection 70 .
  • the flow behavior or suction behavior is thereby 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 adjustment protection bodies 81A, 81B or both adjustment protection bodies 81A, 81B could be mounted directly on the upper side protection device 60, but this is not shown in the drawing.
  • the adjusting device 190 in particular its screw connection or screw bolts or bearing bolts, could be arranged directly on the covering hood 62, in particular its front area in the working direction A1 or A2.
  • the covers 82, 62 are, so to speak, nested within one another. 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. Furthermore, the suction is optimal. The cover 62 and the cover 82 therefore 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)
EP20164278.2A 2017-05-22 2018-04-25 Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection Pending EP3705249A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017111070.4A DE102017111070A1 (de) 2017-05-22 2017-05-22 Schutzabdeckung für eine Säge und damit ausgestattete Säge
EP18169284.9A EP3424656B1 (fr) 2017-05-22 2018-04-25 Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP18169284.9A Division EP3424656B1 (fr) 2017-05-22 2018-04-25 Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection
EP18169284.9A Division-Into EP3424656B1 (fr) 2017-05-22 2018-04-25 Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection

Publications (1)

Publication Number Publication Date
EP3705249A1 true EP3705249A1 (fr) 2020-09-09

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EP18169284.9A Active EP3424656B1 (fr) 2017-05-22 2018-04-25 Couvercle de protection pour une scie et scie équipée d'un tel couvercle de protection
EP20164278.2A Pending 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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Application Number Title Priority Date Filing Date
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019200366A1 (de) 2019-01-14 2020-07-16 Festool Gmbh Sägeblattabdeckung, Anschlagseinheit und Tischsäge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68199C (de) * P. BERNER in Dresden-Altstadt, Eliasplatz 2 Schutzvorrichtung für Kreissägen
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
DE102006055018B3 (de) * 2006-11-22 2007-10-31 Metabowerke Gmbh Tischkreissäge
US20110094625A1 (en) * 2009-10-23 2011-04-28 Zhejiang Shida Tools Manufacture Co., Ltd. Mobile Hood of Wood-Working Table Saw
CN103963169A (zh) * 2013-02-02 2014-08-06 南京搏峰电动工具有限公司 台锯

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5822864A (en) * 1996-05-31 1998-10-20 Black & Decker, Inc. Viewing window for circular saw guard
US8646369B2 (en) * 2007-10-01 2014-02-11 Sd3, Llc Table saw guards, splitter assemblies, accessories, and table saws including the same
JP2007076235A (ja) * 2005-09-15 2007-03-29 Makita Corp 切断機
DE102006014647B4 (de) * 2006-03-28 2016-06-09 Otto Martin Maschinenbau Gmbh & Co. Kg Bearbeitungsmaschine, insbesondere Kreissäge
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
EP2969424B1 (fr) * 2013-03-12 2018-02-21 Robert Bosch GmbH Scie à table avec système de détection de protection
DE102014108998A1 (de) * 2014-06-26 2015-12-31 Mafell Ag Tischkreissäge

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68199C (de) * P. BERNER in Dresden-Altstadt, Eliasplatz 2 Schutzvorrichtung für Kreissägen
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
DE102006055018B3 (de) * 2006-11-22 2007-10-31 Metabowerke Gmbh Tischkreissäge
US20110094625A1 (en) * 2009-10-23 2011-04-28 Zhejiang Shida Tools Manufacture Co., Ltd. Mobile Hood of Wood-Working Table Saw
CN103963169A (zh) * 2013-02-02 2014-08-06 南京搏峰电动工具有限公司 台锯

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Publication number Publication date
DE102017111070A1 (de) 2018-11-22
EP3424656A1 (fr) 2019-01-09
EP3424656B1 (fr) 2020-04-29

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