DE102004035876B3 - Protection and guidance device for use in cutting or sawing device, has swiveling parts tiltable relative to operation of cutting or sawing device around common axis of rotation, and supporting rollers arranged in one part - Google Patents

Abstract

The device has a protection cover (10) that forms a receiving space for parts of a disk surrounding a separating tool (2). Swiveling parts (13, 14) are tiltable relative to operation of a cutting or sawing device around a common axis of rotation. Two supporting rollers (16) are arranged in the part (13) projecting into the space of the cover. Rolling axis of the roller is aligned in an angle from 10 degree to a radius outgoing from the rotation. The swiveling parts are arranged outside of the tool. An independent claim is also included for cutting or sawing device with a protection and guidance device.

Description

technical area

The The invention relates to a protective and guiding device for a cutting or sawing device in the Preamble of claim 1 mentioned type, as well as a cutting or sawing device with a such protection and guidance device.

cutting or sawing equipment for an off-center driven, disc-shaped Cutting tool, such as milling or cutting discs and annular Saw blades, draw especially due to their high cutting depth relative to the Diameter of the disc-shaped Separating tool, because this is deeper than the amount of the radius can dip into the component to be machined.

Becomes no such cutting or sawing equipment Protective device provided, the user can turn on the rotating In case of unintentional contact with the tool, violate it. For example Therefore, guards are used on circular saws provided in the form of protective covers that surround the saw blade. The known constructions of protective covers for Let circular saws not on cutting or sawing tools with eccentric transmitted driven, disc-shaped separating tools, there with such designs of protective devices the depth of cut of the eccentrically driven, disc-shaped separating tools would be significantly reduced.

From the CH 395 515 A is known as a protective device for a circular sawing a protective hood which forms a receiving space for surrounding the area eccentrically driven, annular cutting tool and is connected relative to the cutting or sawing about a plane perpendicular to the saw blade pivot axis and slidably connected thereto along with the housing of the circular saw. A disadvantage of this solution is that this guard has a large footprint and especially in confined spaces, the scope of the device with such a protective cover is significantly limited.

To reduce the projecting height of a protective hood in the immersed state of the disc-shaped cutting tool on the component to be machined, for example, from US 5,167,215 A a protective hood for a circular saw device known to arrange a relative to the circular saw device pivotable about a pivot axis pivoting part of the protective hood, which pivots upward upon descent of the disc-shaped cutting tool. The proposed solution can also be implemented in a customized form for a protective device for a cutting or sawing device having an eccentrically driven, disk-shaped separating tool and a housing.

One Another problem with a cutting or sawing device for an eccentrically driven, disc-shaped cutting tool is the limited guide of the disc-shaped Separating tool before immersion in the component. The limited leadership of the discoid Separating tool is characterized by the arrangement of the drive rollers and, if provided, by the arrangement of the guide rollers in conjunction with the desire of the largest possible Depth of cut with respect to the diameter of the disc-shaped cutting tool conditionally.

In the already mentioned above CH 395 515 A The ring saw shown, for example, the annular saw blade guided only by the drive rollers and additional guide rollers based on the axis of rotation of the eccentrically driven disc-shaped cutting tool over an angular range of about 70 °. Until the annular saw blade is guided through the walls in the created section, the eccentric driven disc-shaped separating tools often have a so-called "fluttering" or a non-circular motion Useful life of the eccentric driven disc-shaped cutting tool adversely affect.

From the DE 21 61 489 A is a arranged in the peripheral region, two-piece shield for a cutting or sawing device with an eccentrically driven disc-shaped cutting tool known, the shield forms a receiving space for the eccentric driven disc-shaped cutting tool surrounding the eccentrically driven, disc-shaped cutting tool circumferentially partially. A shield member has an additional, projecting into the receiving space, on a roller axle gelager te support role and is upwardly or, based on the annular saw blade, radially pivoting away from this. A disadvantage of this known solution is that the support roller for sufficient stability must be located near the hinge point and that the disc-shaped cutting tool is guided based on its axis of rotation only over an angular range of about 95 °. The peripheral cover by the wegschwenkbaren shield part with the additional support roller is very limited, since the wegschwenkbare shield part must be swung away as soon as this on the surface of the machined Component is pending, and then the leadership is no longer given by the additional support role.

From the DE 100 23 490 A1 is a cutting or sawing device with an eccentrically driven disc-shaped cutting tool is known in which an additional support roller on a boom which is upwardly or, based on the disc-shaped saw blade, radially pivotable away from this. By this arrangement, the disc-shaped cutting tool is guided over its angular axis over an angular range of about 130 ° relative to its axis of rotation, whereby the guide thereof is substantially improved. However, protection against inadvertent contact with the rotary cutting tool is only given in the region of the extension of the boom.

From the US 4,316,328 A is a protective and guiding device for a cutting or sawing device with an eccentrically driven annular cutting tool known. The protective device which covers the annular separating tool in certain regions comprises a stationary fixed part on the cutting or sawing first segment part, an articulated connected thereto and swing away from this second segment part and a telescopically with the second segment part collapsible third segment part. The separately arranged on the protective device on the cutting or sawing device guide means has an inner periphery of the eccentric driven, annular separating tool acting additional support role on a boom, which also dips into the created slot when immersing the eccentric driven annular cutting tool. A disadvantage of the known solution is that the space of the boom and the additional support roller determines the cutting width for the slot or section to be created. Because the performance or the power requirement of the cutting or sawing device depends crucially on the volume to be removed for creating the slot or cut, this represents a significant disadvantage.

Out the US RE 27,716 is a protection and guidance device a peripherally on an annular sawblade arranged guard for a cutting or sawing device known. The guard has a stationary one specified on the cutting or sawing device first segment part, a telescope with the first segment part collapsible second segment part and one over one Hinge hinged to the second segment part and connected by this wegschwenkbaren third segment part. The segment parts have a U-shaped cross-section on and surround the edge of the annular saw blade. At the second segment part a roller unit is provided which has a guide roller with a bead and having a counter-roller and as a holding and guiding device for the Inner edge of the annular saw blade acts. The roller axes are aligned with the center of the annular saw blade. At the third segment part are for damping the saw blade vibrations two opposite each other arranged rollers provided, the roller axes also for Center of the annular saw blade are aligned. Next is a telescopically collapsible Parts educated Mitnehmerarm provided on the one hand to a Rotatable on the first segment part pin and on the other hand is articulated to the hinge on the second segment part. When dipping the tool in the workpiece to be separated the second and third segment part of the rotating around the pin Mitnehmerarm taken along a curved path, wherein the second segment part telescopically in the first segment part up is inserted to a limit position in which the hinge on pending the free end of the first segment part. The second and third segment part pivot about an axis of rotation, with the axis of rotation of the annular saw blade in the center of it coincides. The third segment part becomes upon further immersion about the hinge pivoted. about Spring elements, the segment parts can be returned to their original position.

presentation the invention

task The invention relates to a protective and guiding device for a cutting or sawing device for off-center driven, disc-shaped separating tools to create, on the one hand, a protection for the user from rotating eccentrically driven disc-shaped separating tool and on the other hand a good guide of the eccentrically driven disc-shaped separating tool offers, and a cutting or sawing device with a such protection and guidance device to accomplish.

The Tasks are solved by the features of the independent claim. advantageous Further developments are set forth in the subclaims.

According to the invention is the axis of rotation of the at least one pivot part outside the arranged eccentrically driven, disc-shaped cutting tool and the roller axis of the at least one support roller in an angular range from -30 ° to + 30 ° to one Aligned from the axis of rotation radius.

The receiving space formed by the protective cover is advantageously designed such that the eccentrically driven, disc-shaped cutting tool at the beginning of the machining process is largely completely in this comes to rest and thus is largely completely surrounded by the guard. As soon as the free edge of the at least one pivoting part strikes the substrate during application of the eccentrically driven disk-shaped separating tool, the at least one pivoting part pivots about the axis of rotation, which runs essentially parallel to the axis of rotation of the eccentrically driven disk-shaped separating tool, relative to the cutting or Saw unit automatically gone. The arranged on the at least one pivot part, at least one projecting into the receiving space support roller is thereby swung and can be on the whole, traveled by her way with the eccentric driven disc-shaped cutting tool in contact, whereby its leadership throughout the time to create the Slit or the cut is guaranteed. Since the at least one support roller does not dive into the slot or into the cut, the protection and guide device according to the invention has no influence on the cutting width to be created and thus also not on the performance of the cutting or sawing device.

By the orientation of the roller axis of the at least one support roller to the outgoing from the axis of rotation radius is the steady rolling the at least one supporting role on one of the sides of the eccentrically driven, disc-shaped separating tool on the ensures total Verschwenkweg the at least one pivoting part. The by the angular position of the roller axis and the resulting inclination the at least one supporting role caused Reibabnutzung the at least one support roller moves in one negligible Range and has no significant impact on the useful life the at least one supporting role or the protection and guide device according to the invention. The orientation of the roller axis of the at least one support roller to the outgoing from the axis of rotation radius is also by the design the rolling or contact surface of the at least one support roller dependent. Indicates the contact surface the at least one supporting role For example, a spherical configuration, so the roll axis the at least one supporting role with warranty the unrolling of the at least one support roller at a larger angle be aligned to the outgoing from the axis of rotation, as it in a flat configuration of the contact surface of the at least one support roller without a significantly increased Rubbing possible is.

Right the axis of rotation with the axis of rotation of the eccentrically driven, discoid Separating tool, results in an optimal rolling behavior of at least one support roller the eccentrically driven, disc-shaped cutting tool. Because the Rotary axis usually does not coincide with the axis of rotation of the eccentric driven disc-shaped separating tool, results from an orientation of the roller axis of at least a support role in an angular range of -20 ° to + 20 ° to that of the axis of rotation outgoing radius, depending on the position of the axis of rotation to the axis of rotation, in some areas an optimal and a suboptimal Rolling behavior of at least one support roller along the off-center driven, disc-shaped separating tool.

The at least one supporting role can spring loaded on the at least one segment part arranged so that even at different latitudes or a non-round Run the eccentric driven, disc-shaped cutting tool and at different possible intervals the eccentric driven, disc-shaped separating tool to the at least one segment part of the contact of the at least one support roller ensures the eccentrically driven, disc-shaped cutting tool is.

The according to the invention, on a cutting or sawing device for an off-center driven, disc-shaped Cutting tool provides definable protection and guiding device guaranteed the protection of the user against inadvertent contact with the user rotating cutting tool and also the leadership of the eccentric driven, disc-shaped cutting tool based on its axis of rotation over an angular range of about 210 °.

Prefers is the roller axis of the at least one support roller in an angular range from -10 ° to + 10 ° to that of aligned with the axis of rotation outgoing radius, which is advantageous on the Reibabnutzung due to the angular position of the roller axis and the resulting skew of the at least one supporting role effect.

Preferably, two support rollers are arranged on the at least one pivot part of the protective hood, whereby the guidance of the eccentrically driven, disc-shaped separating tool is improved. Particularly advantageously, the support rollers are arranged opposite one another, so that the contact surfaces of the support rollers roll along the two sides of the disk plane, spanned by the eccentrically driven disk-shaped parting tool. Thus, the eccentric driven disc-shaped cutting tool is guided on both sides of the support rollers. Further advantageously, the support rollers are exactly opposite each other lying on the arranged at least one pivot part and the roller axes are aligned at the same angle to the outgoing from the axis of rotation radius, so that in the region of the support rollers eccentrically driven, disc-shaped cutting tool is held perpendicular to the disk plane and the contact surfaces of the support rollers in a preferred manner along roll off the two sides of the eccentrically driven disc-shaped cutting tool.

In an advantageous variant, the opposing ones support rollers spaced such that between the eccentrically driven, discoid Cutting tool and the support rollers a movement of the eccentrically driven, disc-shaped separating tool in Range of a few millimeters is possible. Take over the support rollers their leadership function, if the movement is in the direction of that of the eccentrically driven, discoid Cutting tool spanned plane of the eccentric driven, discoid Separating tool outside of the spaced support rollers predetermined range is. With such spaced support rollers is also with an eccentrically driven, disc-shaped separating tool, the circumference with hard bodies stocked is a simple replacement of the eccentric driven disc-shaped cutting tool guaranteed.

In an inventive embodiment the protective and guiding device the at least one pivot part of the protective cover has foldable wall sections on. The protective hood is for example in the form of a fan-like collapsible body section formed in the manner of a paper lantern, the one with a stringing having provided support frame. The covering can be made with a folding structure be provided to a perfect collapse of at least a swiveling part of the protective cover to be guaranteed. The at least one supporting role is advantageously provided on a portion of the support frame.

In another, inventive embodiment the protective and guiding device has the protective hood on at least one additional pivoting part, the pivotally arranged about the axis of rotation of the at least one pivoting part is, with the additional Pivoting part telescopically with the at least one pivoting part collapsible is. In the retracted state of the pivoting parts, the protective and leadership facility only a small height above the surface of the component to be machined, so a large application area of the cutting or sawing device with a protective and guiding device allows is.

In dependence the design of the guard or the diameter of the eccentric driven, disc-shaped Cutting tool can to create the protection and guide means Also, more than two pivoting parts are provided, for example pivotable about a common axis of rotation and telescopically with each other are collapsible.

moreover is the arrangement of several support rollers on one or each the existing pivoting parts of the protective cover conceivable, the arrangement of two each, directly opposite each other arranged support rollers is preferred on each of the existing pivoting parts.

In a further advantageous, inventive embodiment of the protective and guide means The protective hood has a segment part that can be fixed on the cutting or sawing device on, wherein the at least one pivoting part relative to the segment part is fixed to a pivotable about an axis of rotation on the segment part, and wherein the at least one pivoting part telescopes with the segment part is collapsible. The extent of stationary fixable Segment part is advantageously chosen such that the drive rollers and the possibly existing guide rollers of Cutting or sawing device through the stationary fixable Segment part are covered. This will also be fixed with a stationary Segment part a maximum possible depth of cut ensures the eccentric driven, disc-shaped cutting tool.

Especially in this embodiment the Protective and guiding device, but not limited to just these, can be set according to the diameter of the inserted in the cutting or sawing device eccentrically driven, disc-shaped separating tool a adapted to its extent or dimensions and leadership facility arranged on the cutting or sawing device and be exchanged if necessary.

The stationary fixable segment part, for example, has a detachable with a counter-fastening device on the housing of the cutting or sawing device fastening device with releasable fastening means. The fastening device is z. B. formed as a flat flange, which is provided with through openings for passing screws as a releasable fastening means. The counter-fastening device is for example also designed as a flat flange, which is provided with through openings for passing the screws. The two flanges are brought into abutment with each other and by means of the screws for fixing the protective and guide means on the housing of the cutting or saw device connected to each other. In a variant of this, the fastening device is provided with a hooking device for fixing the protective and guiding device on the housing of the cutting or sawing device. Instead of screws, the releasable attachment means for fixing the protection and guide means on the housing of the cutting or sawing device as a quick release, z. B. in the form of a snap mechanism or a spring clip, be formed.

Prefers are in the embodiment the protective and guiding device with a stationary fixable Segment part additionally two telescopically collapsible pivot parts on the stationary segment part provided, wherein the pivot parts pivotable about a common axis of rotation are fixed to the segment part. In the collapsed state the pivoting parts, the protective and guiding device has only a small Height above the surface of the component to be machined, whereby a large application of the Cutting or sawing device with a protective and guiding device allows is.

at all inventive embodiments the protective and guiding device may be provided a suction nozzle for mounting a vacuum source become. The suction nozzle is for the connection of a hose for connection to the vacuum source, such as As an industrial vacuum cleaner, trained and for example on one of the pivoting parts or, if present, advantageous at the stationary fixable segment part arranged. With such a protection and guide means can accumulating media, such as the accumulating dust or also the cutting or sawing device supplied coolant, within the protection and guidance device sucked off and the environment from unwanted emissions largely protected become.

The invention Cutting or sawing device with a eccentrically driven, disc-shaped cutting tool and with a housing is with a protective and guiding device provided, which essentially the above features and Has advantages.

Preferably is in the inventive Cutting or sawing device, the stationary segment part as part of the housing formed of the cutting or sawing device. The extension of the formed as part of the housing of the cutting or sawing device Segment part is advantageously chosen such that the drive rollers and the possibly existing guide rollers of the cutting or Saw unit through this stationary Segment part are covered. This ensures the greatest possible cutting depth of the off-center driven, disc-shaped Separating tool with a trained as a part of the housing of the cutting or sawing device Segment part guaranteed.

Prefers is the at least one support role at least one side of the eccentrically driven, disk-shaped separating tool at. this makes possible by a continuous rolling of the contact surface of the at least one support roller along the eccentrically driven, disk-shaped separating tool a sufficient guide thereof. To a concern of at least one supporting role over the Duration of use of the inventive Cutting or sawing device is to ensure the at least one supporting role advantageous spring loaded mounted on the protective and guiding device. Furthermore, an advantageous embodiment of the cutting or sawing device several, preferably at least two mutually directly opposite support rollers on. In an advantageous variant of this, the opposing support rollers spaced such that between the eccentrically driven, discoid Cutting tool and the support rollers a movement of the eccentrically driven, disc-shaped separating tool in the range of a few millimeters is possible.

Out The following detailed description and the totality of the claims will become apparent further advantageous embodiments and feature combinations of the invention.

Short description the drawings

The Invention will be explained in more detail below with reference to several embodiments. Show it:

1 A side view of an inventive cutting or sawing device with a first embodiment of a protective and guiding device;

2 a side view on the in 1 shown cutting or sawing device with the protection and guide device in the collapsed state;

3 a view from below of the in 1 shown cutting or sawing device with a view into the protection and guide device;

4 a side view of a cutting or sawing device with a second embodiment of a protective and guiding device; and

5 : A side view of a third embodiment of a set on a cutting or sawing protection and guidance device.

Basically in the figures, like parts with the same reference numerals.

Ways to execute the invention

That in the 1 to 3 shown inventive cutting or sawing device 1 for an eccentrically driven, disc-shaped cutting tool 2 has a housing 3 in which a motor (not shown here) for the drive of the eccentric driven disc-shaped cutting tool 2 is arranged, and a protective and guiding device 4 with a protective cover 10 on, which is a recording room 11 for partially surrounding the eccentric driven, disc-shaped separating tool 2 formed. The eccentric driven disc-shaped cutting tool 2 on the one hand from the drive roller 5 and the counter-roll 6 and by two opposing guide rollers 7 on the cutting or sawing device 1 held.

The protective hood 10 the protective and guiding device 4 gets through a stationary, out of the case 3 trained segment part 12 , a first pivoting part 13 and a second pivot part 14 formed, with the pivoting parts 13 and 14 around a rotation axis 15 relative to the cutting or sawing device 1 or relative to the segment part 12 are pivotally fixed. At the first pivoting part 13 are two, directly opposite one another, each on a roller axis 18 mounted support rollers 16 arranged. The roller axes 18 are at an angle α of about 5 ° to one of the axis of rotation 15 outgoing radius R aligned. Furthermore, on the segment part 12 a suction nozzle 17 for the connection of a vacuum source (not shown here) provided.

As in particular from the 2 can be seen, swing the two pivoting parts 13 and 14 automatically away when this is the surface 9 of the component to be machined 8th , z. B. the surface of a concrete surface, touch. Here are the segment parts 13 and 14 first pushed together telescopically and then over the segment part 12 pushed.

At the in 4 illustrated cutting or sawing device 21 has the protective hood 22 partially foldable wall sections 23 on. The wall sections 23 are in the manner of a covering on support elements 24 . 25 and 26 arranged. The lower support element 26 and the middle support element 24 are about the axis of rotation 28 pivoted set. At the middle support element 25 is one on a roller axle 29 mounted support roller 27 arranged. The roll axis 29 is at an angle β of about 15 ° to that of the rotation axis 28 outgoing radius R aligned.

In the 5 is an embodiment of the protection and guide device 31 shown having a fixing device 41 replaceable on the housing 39 of the cutting or sawing device 32 is determinable. The protective hood 33 has a stationary fixable segment part 34 , a middle pivoting part 35 where on each one roll axis 40 mounted support rollers 38 are arranged, and another pivoting part 36 on. The pivoting parts 35 and 36 are about the axis of rotation 37 pivotable. The roll axis 40 is at an angle γ of about 10 ° to that of the rotation axis 37 outgoing radius R aligned.

The fixing device 41 includes one on the stationary fixable segment part 34 arranged flange 42 and one on the housing 39 of the cutting or sawing device 32 trained flange 43 , both with lead-through holes for passing screws 44 for releasably securing the protective and guiding device 31 on the cutting or sawing device 32 are provided.

Claims (10)

Protection and guidance device ( 4 ; 31 ) for a cutting or sawing device ( 1 ; 21 ; 32 ), which is an eccentrically driven disc-shaped cutting tool ( 2 ) and a housing ( 3 ; 39 ), with a protective hood ( 10 ; 22 ; 33 ) the at least one pivoting part ( 13 . 14 ; 35 . 36 ) having a receiving space ( 11 ) for partially surrounding the eccentrically driven, disc-shaped separating tool ( 2 ), wherein the at least one pivoting part ( 13 . 14 ; 35 . 36 ) the protective hood ( 10 ; 22 ; 33 ) on the cutting or sawing device ( 1 ; 21 ; 32 ) relative to this about a rotation axis ( 15 ; 28 ; 37 ) is pivotally fixable, and wherein on the at least one pivoting part ( 13 ; 35 ) at least one in the recording room ( 11 ) projecting on a roller axis ( 18 ; 29 ; 40 ) supported support roller ( 16 ; 27 ; 38 ), characterized in that the axis of rotation ( 15 ; 28 ; 37 ) of the at least one pivoting part ( 13 . 14 ; 35 . 36 ) outside of the eccentrically driven, disk-shaped separating tool ( 2 ) and the roller axis ( 18 ; 29 ; 40 ) of the at least one support roller ( 16 ; 27 ; 38 ) in an angular range of -30 ° to + 30 ° to one of the axis of rotation ( 15 ; 28 ; 37 ) outgoing radius (R) is aligned. Protective and guiding device according to claim 1, characterized in that the roller axle ( 18 ; 29 ; 40 ) of the at least one support roller ( 16 ; 27 ; 38 ) in an angular range of -10 ° to + 10 ° to that of the axis of rotation ( 15 ; 28 ; 37 ) outgoing radius (R) is aligned. Protective and guiding device according to claim 1 or 2, characterized in that two Support rollers ( 16 ) on the at least one pivoting part ( 13 ) the protective hood ( 10 ) are arranged, wherein the support rollers ( 16 ) are optionally arranged opposite one another. Protection and guide device according to one of claims 1 to 3, characterized in that the at least one pivot part of the protective hood ( 22 ) foldable wall sections ( 23 ) having. Protective and guiding device according to one of claims 1 to 3, characterized in that the protective hood ( 10 ; 33 ) at least one additional pivoting part ( 14 ; 36 ), which pivotally about the axis of rotation ( 15 ; 37 ) of the at least one pivoting part ( 13 ; 35 ), wherein the additional pivoting part ( 14 ; 36 ) telescopically with the at least one pivoting part ( 13 ; 35 ) is collapsible. Protective and guiding device according to one of claims 1 to 3, characterized in that the protective hood ( 10 ; 33 ) on the cutting or sawing device ( 1 ; 34 ) Stationarily fixable segment part ( 12 ; 34 ), wherein the at least one pivoting part ( 13 . 14 ; 35 . 36 ) relative to the segment part ( 12 ; 34 ) about a rotation axis ( 15 ; 37 ) pivotable on the segment part ( 12 ; 34 ) is determined, and wherein the at least one pivoting part ( 13 . 14 ; 35 . 36 ) telescopically with the segment part ( 12 ; 34 ) is collapsible. Protection and guide device according to claim 6, characterized in that two telescopically collapsible pivoting parts ( 13 . 14 ; 35 . 36 ) on the segment part ( 12 ; 34 ) are provided, wherein the pivoting parts ( 13 . 14 ; 35 . 36 ) about a common axis of rotation ( 15 ; 37 ) pivotally on the segment part ( 12 ; 34 ). Cutting or sawing device with an eccentrically driven disc-shaped cutting tool ( 2 ) and with a housing ( 3 ; 39 ), as well as a protection and guidance device ( 4 ; 31 ) according to one of claims 1 to 7. Cutting or sawing device according to claim 8, characterized in that the stationary segment part ( 12 ) as a part of the housing ( 3 ) of the cutting or sawing device ( 1 ) is trained. Cutting or sawing device according to claim 8 or 9, characterized in that the at least one support roller ( 16 ) on at least one side of the eccentrically driven, disk-shaped separating tool ( 2 ) is present.