EP3827952B1 - Wall saw with guide for saw blade guard - Google Patents

Wall saw with guide for saw blade guard Download PDF

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Publication number
EP3827952B1
EP3827952B1 EP19212507.8A EP19212507A EP3827952B1 EP 3827952 B1 EP3827952 B1 EP 3827952B1 EP 19212507 A EP19212507 A EP 19212507A EP 3827952 B1 EP3827952 B1 EP 3827952B1
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EP
European Patent Office
Prior art keywords
arm
gear wheel
partial arm
gear
partial
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
EP19212507.8A
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German (de)
French (fr)
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EP3827952A1 (en
Inventor
Wolfgang Winkler
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Eurodima & Co KG GmbH
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Eurodima & Co KG GmbH
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Priority to EP19212507.8A priority Critical patent/EP3827952B1/en
Publication of EP3827952A1 publication Critical patent/EP3827952A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/045—Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/04—Protective covers for the grinding wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/044—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs the saw blade being movable on slide ways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • 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 present invention relates to a wall saw with a protective guide, the wall saw comprising a saw unit with a swivel arm and a saw blade that can be mounted on the swivel arm, as well as a blade guard with a protective guide.
  • Wall saws allow you to cut through walls, ceilings and floors made of hard building materials such as concrete.
  • the most common wall saws consist of a saw blade, for example a diamond saw blade, which is mounted on a saw head, which in turn sits on the free end of a swivel arm.
  • the swivel arm is mounted on the base body of the wall saw and the base body can be moved along a guide rail.
  • the guide rail is attached to a wall or the like and the swivel arm allows the saw blade to plunge into the wall.
  • the blade guard holder With associated blade guard on the base body of the wall saw.
  • the blade guard holder always extends parallel to the plunging direction of the saw blade and at least partially surrounds it, regardless of the orientation of the swivel arm.
  • the operator is protected on the one hand from direct contact with the saw blade and on the other hand also from indirect contact, for example from parts of the saw blade that have broken off during sawing.
  • EP 1 072 355 A2 discloses a wall saw with a blade guard holder, in which the plunge depth of the saw blade is indicated on the blade guard holder using markings. Furthermore, in EP 2 258 527 B1 discloses a wall saw with a device for adjusting a blade guard holder mounted on the saw arm of the wall saw.
  • the blade guard In some wall saws with a blade guard holder known from the prior art, the blade guard is mounted with a linear guide attached to the base body and is driven via guide rails. This tour is very dependent on the subsoil. This means that the blade guard can no longer constantly move if there are grooves or bumps in the concrete move flush with the wall with the saw. This keeps opening up gaps between the wall and blade guard, through which broken parts and dirt can fly out.
  • known blade guard devices also move along the wall with the wall saw by means of guide rollers, which are mounted on the open end of the blade guard, as soon as the saw blade has penetrated the wall as far as possible. If these small guide rollers get dirty due to the concrete sawing work and jam as a result, the blade guard can no longer slide along the wall. Difficulties also arise with existing corner holes, since the rollers simply fall into them.
  • the object of the present invention is therefore to provide a wall saw with a protective guide, which allows the blade guard to move synchronously with the saw blade when it is inserted or pulled out of the wall or the like, without requiring a vertical displacement of the blade guard, which can thus also be moved independently of the prevailing surface moved evenly.
  • the protective guide should be able to be assembled and disassembled on the base body of the wall saw in a very simple manner and it should be possible to dispense with guide rollers at the open end of the blade guard.
  • the position of the protective guide can therefore be specified in relation to the longitudinal axis of the first sub-arm, since the first sub-arm is permanently connected to the saw unit and is the only one non-rotatably mounted part of the protective guide.
  • the longitudinal axis of the first partial arm is essentially perpendicular to the saw unit.
  • the second partial arm and the swivel arm are aligned in parallel and are mounted synchronously so as to be rotatable about the longitudinal axis of the first partial arm. This means that the second partial arm rotates simultaneously with the swivel arm in the same direction, with the second partial arm and the swivel arm or their longitudinal axes constantly being parallel to one another.
  • the third sub-arm is rotatably mounted synchronously in the opposite direction with the second sub-arm about the longitudinal axis of the first sub-arm.
  • the longitudinal axis of the third partial arm is aligned parallel to the longitudinal axis of the first partial arm when the longitudinal axes of the second partial arm and the pivot arm are also aligned parallel to the longitudinal axis of the first partial arm.
  • This means that the longitudinal axes of the second partial arm, the third partial arm and the swivel arm are always perpendicular to the saw unit at the same time during the revolutions.
  • the longitudinal axes of all partial arms of the protective guide and the longitudinal axis of the swivel arm are aligned parallel to one another and perpendicular to the saw unit.
  • a further embodiment variant of the wall saw according to the invention is given by the constant alignment of the blade guard holder mounted on the free end of the third partial arm. Even when the third sub-arm rotates, the orientation of the blade guard holder remains unchanged, in that the blade guard holder rotates synchronously and in the opposite direction to the third sub-arm. Therefore, the blade guard holder cannot be connected in a rotationally fixed manner to the entire third sub-arm.
  • the blade guard since the blade guard is mounted directly to the blade guard holder, rotational movement of the blade guard holder is automatically translated into translational movement of the blade guard. Accordingly, the distance between the blade guard and the wall remains unchanged even when the swivel arm rotates, which also triggers a rotation of the blade guard holder. This means that the gap between the blade guard and the wall always remains unchanged when the saw blade is pulled out of the wall or before the saw blade plunges into the wall.
  • the size ratios of the first, second and third sub-arms are chosen so that when all sub-arms rotate synchronously, the distance between the blade guard holder and the Saw unit essentially remains the same. Due to this and the above feature of the protective guide according to the invention, the blade guard mounted on the blade guard holder always runs directly along the wall, floor or ceiling without increasing the distance to the wall or the like.
  • the blade guard is preferably adapted to the size of the saw blade in order to allow the greatest possible protection for the operator of the wall saw. In one embodiment of the blade guard according to the invention, the entire saw blade fits into the blade guard if the blade diameter is less than or equal to 800 mm.
  • the main drive gear is installed in the saw unit and not in the first sub-arm. More precisely, in the saw unit there is a main drive gear which is arranged coaxially under the swing arm. Furthermore, there is at least one auxiliary drive gear in the saw unit above the main drive gear, which meshes with the main drive gear.
  • the main drive gear is non-rotatably connected to the swivel arm by means of a main drive shaft and thus rotates in the same direction and synchronously with the swivel arm.
  • the auxiliary drive gear is non-rotatably connected to the drive gear in the first sub-arm by means of a first drive shaft. The drive gear in the first sub-arm thus rotates in the same direction and synchronously with the auxiliary drive gear.
  • a second drive shaft connects the first sub-arm and the second sub-arm to one another, with the terminal gear wheel in the first sub-arm and the second sub-arm being non-rotatably connected to the second drive shaft.
  • the second partial arm rotates rectified and synchronous with the terminal gear in the first sub-arm, which is driven by the main drive gear.
  • the second sub-arm should rotate synchronously with the swivel arm in the same direction, only an even number of rotatable, meshing gears can be installed one above the other in the first sub-arm due to the described structure of the gear mechanism, since the main drive gear is aligned with the Swivel arm rotates and the drive gear wheel in the first sub-arm rotates in the opposite direction. This is the only way that the second partial arm rotates in the same direction as the swivel arm.
  • the second sub-arm preferably comprises a two-stage gear train with at least three meshing gear wheels in the first and second gear stage.
  • the first gear wheel of the first gear stage and the first gear wheel of the second gear stage are non-rotatable and arranged coaxially above the terminal gear wheel in the first partial arm. That is, these two gears do not rotate.
  • the terminal gear wheel of the first gear stage is non-rotatably connected to the third partial arm, with the first gear wheel of the first gear stage being twice the size of the terminal gear wheel of the first gear stage, with the first gear wheel of the second gear stage being the same size as the terminal gear wheel of the second gear stage .
  • the third partial arm which is driven by the first gear wheel of the first gear stage, rotates in the opposite direction to the second partial arm.
  • a stationary shaft preferably also connects the terminal gear wheel of the second gear stage to the first gear wheel in the third sub-arm in a non-rotating manner and coaxially one above the other.
  • the terminal gear wheel of the first gear stage is arranged between the terminal gear wheel of the second gear stage and the first gear wheel in the third partial arm, but is not connected to the stationary shaft. This means that the terminal gear wheel of the second gear stage and the first gear wheel in the third partial arm do not rotate or only rotate with the second partial arm, since the stationary shaft is connected to it.
  • the blade guard holder is non-rotatably connected to the terminal gear wheel in the third section arm, with the terminal gear wheel in the third sub-arm is rotatably mounted in the third sub-arm.
  • the blade guard holder rotates in the same direction and synchronously with the terminal gear wheel in the third sub-arm.
  • the blade guard holder must rotate in the opposite direction to and half the speed of the third sub-arm to compensate for its rotation and to keep the alignment of an installed blade guard constant.
  • an odd number of gear wheels preferably three gear wheels, are also installed in the third sub-arm, since the first gear wheel in the third sub-arm does not rotate, as described above.
  • the first gear in the third sub-arm is the same size as the terminal gear in the third sub-arm.
  • the desired gear ratio results from the described size ratios of the gears in the second partial arm, which on the one hand drive the third partial arm and on the other hand drive the blade guard holder. More specifically, the third sub-arm preferably rotates twice as fast as the blade guard holder.
  • This preferred arrangement of the gears in the protective guide of the wall saw allows that when the saw blade is mounted, the blade guard constantly surrounds the entire part of the saw blade that is not immersed in the wall and always moves along the wall automatically with the saw blade and due to the proportions of the partial arms of the protective guide .
  • the wall saw according to the invention comprises a swivel arm with a saw blade mounted thereon and a blade guard with a protective guide.
  • the movement of the blade guard is coupled to the plunging and pulling out of the saw blade from a wall via the guard guide.
  • the base body of the wall saw can be moved along a guide rail mounted on the wall.
  • the length of the guide rail indicates the working area of the wall saw.
  • the working range can only be changed by changing the position of the guide rails, more precisely by dismantling and assembling the guide rail.
  • the figures show the protective guide of a wall saw with a blade guard holder 6, on which the blade guard of the wall saw can be mounted.
  • the protective guide which comprises a first arm part 1 fixed to the saw unit 13, a second, rotatable arm part 2, fixed in an articulated manner to the free end of the first arm part 1, and a third, rotatable arm part 3, fixed in an articulated manner to the second arm part 2.
  • Attached to the free end of the third partial arm 3 is a blade guard holder 6, on which the blade guard (not shown for reasons of clarity) can be mounted.
  • the second arm 2 and 3 additionally show the swivel arm 4, which is articulated to the base body of the wall saw and on which the saw blade can be mounted.
  • the second arm 2 and the swivel arm 4 are in the basic position of the wall saw as in 2 oriented in parallel as can be seen and rotatably mounted synchronously about the longitudinal axis of the first partial arm 1 .
  • the third arm part 3 is mounted synchronously in the opposite direction with the second arm part 2 so that it can rotate around the longitudinal axis of the first arm part 1 and is also aligned parallel to the second arm part 2 and the swivel arm 4 in the normal position.
  • the basic position of the wall saw shown is the orientation of the swivel arm 4 and the protective guide that they have when the basic body is attached to the guide rail. At the same time, this is also the only position in which the saw blade does not dip into the wall when the saw blade is mounted. Only after the swivel arm 4 begins to rotate does the saw blade dip into the wall.
  • the longitudinal axis of the third partial arm 3 is aligned parallel to the longitudinal axis of the first partial arm 1 and the longitudinal axes of the second partial arm 2 and the swivel arm 4 parallel to the longitudinal axis of the first partial arm 1.
  • the figures also show an exemplary gear drive in the protective guide and on the base body of the wall saw.
  • 1 in 1 six intermeshing gears arranged one above the other, the bottom gear in the first partial arm 1 being the drive gear 7 in the first partial arm 1 and the top gear in the first partial arm 1 being the terminal gear 8 in the first partial arm 1. All gears in the first partial arm 1 are used to drive the second partial arm 2, which is non-rotatably connected to the terminal gear 8 in the first partial arm 1 via a second drive shaft. Since there is an even number of gears in the first partial arm 1, the second partial arm 2 rotates synchronously and in the same direction as the swivel arm 4.
  • the swivel arm 4 is as in 2 shown non-rotatably connected to the main drive gear 14 via the main drive shaft.
  • the main drive gear 14 is part of the saw unit 13 and meshes with the auxiliary drive gear 14 ', which coaxially above the drive gear 7 in first sub-arm 1 is arranged and is rotatably connected to this via a first drive shaft.
  • the main drive gear 14 thus drives the swivel arm 4 on the one hand and the second arm part 2 via the gearing in the first arm part 1 on the other hand.
  • the second partial arm 2 preferably comprises a two-stage gear transmission.
  • the first gear stage is arranged above the second gear stage. Both gear stages include at least three meshing gears.
  • the first gear wheel of the second gear stage 9' and the first gear wheel of the first gear stage 9 are located as in FIG 3 shown coaxially over the terminal gear in the first sub-arm 1 & .
  • the first gear wheel of the first gear stage 9 and the first gear wheel of the second gear stage 9' are connected to the second partial arm 2 in a non-rotating manner. That is, these two gears are not connected to the second drive shaft which drives the second sub-arm 2.
  • the first gear stage in the second arm section 2 is now used to drive the third arm section 3, while the second gear stage in the second arm section 2 is connected directly to the gear mechanism in the third arm section 3 and is therefore responsible for the vertical alignment of the blade guard holder 6.
  • the terminal gear 10 of the first gear stage 9 rotatably connected to the third sub-arm 3.
  • 3 shows the terminal gear wheel 10' of the second gear stage 9', which is connected to the first gear wheel in the third partial arm 11 by a stationary shaft.
  • the terminal gear 10 of the first gear stage 9 and the terminal gear 10' of the second gear stage 9' both of which are in turn mounted non-rotatably in the second sub-arm 2, there is at least one rotating gear in each case. Due to the arrangement of the gears in the first gear stage of the second partial arm 2, the third partial arm 3 rotates in the opposite direction to the second partial arm 2.
  • the size ratios of the gear wheels of the two-stage gear train in the second partial arm 2 selected as follows:
  • the first gear wheel of the first gear stage 9 is twice as large as the terminal gear wheel of the first gear stage 10.
  • the first gear wheel of the second gear stage 9' is the same size as the terminal gear wheel 10' of the second gear stage 9'.
  • the first gear wheel 11 in the third partial arm 3 is connected to the terminal gear wheel 10' of the second gear stage 9' via a stationary shaft.
  • the shaft at rest is connected to the second partial arm 2 .
  • This means that the first gearwheel 11 in the third partial arm 3 is in turn free of rotation in the third partial arm 3 and does not rotate with it.
  • the terminal gear 10 of the first gear stage 9 is non-rotatably connected to the third partial arm 3 and drives it.
  • the terminal gear 12 in the third sub-arm 3 is connected in a rotationally fixed manner to the blade guard holder 6 and drives it. Due to the arrangement of the gears in the third partial arm 3 and the arrangement of the second gear stage in the second partial arm 2, the blade guard holder 6 rotates in the same direction as the second partial arm 2 and in the opposite direction to the third partial arm 3.
  • the different size ratios of the respective first gears of the first and second gear stage 9 , 9' to the respective terminal gears 10, 10' of the first and second gear stages 9, 9' cause the third sub-arm 3 to rotate twice as fast as the blade guard holder 6, whereby its vertical orientation remains unchanged when the third sub-arm 3 rotates .
  • a blade guard mounted on the blade guard holder 6 moves along the guide rails, but always remains flush with the wall and never changes its distance from the wall.
  • a blade guard mounted on the blade guard holder 6 therefore moves with the swivel arm 4 on which the saw blade is mounted.
  • this can be easily removed without dismantling the entire blade guard holder 6.
  • the invention allows Protective guide to use a blade guard without guide rollers, which means that the blade guard offers the greatest possible protection even on uneven surfaces.

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  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Description

Die vorliegende Erfindung betrifft eine Wandsäge mit Schutzführung, wobei die Wandsäge eine Sägeeinheit mit Schwenkarm und einen auf dem Schwenkarm montierbarem Sägeblatt sowie einen Blattschutz mit Schutzführung umfasst.The present invention relates to a wall saw with a protective guide, the wall saw comprising a saw unit with a swivel arm and a saw blade that can be mounted on the swivel arm, as well as a blade guard with a protective guide.

HINTERGRUND DER ERFINDUNG UND STAND DER TECHNIKBACKGROUND OF THE INVENTION AND PRIOR ART

Wandsägen ermöglichen das Durchtrennen von Wänden, Decken und Böden aus harten Baustoffen wie beispielsweise Beton. Die gängigsten Wandsägen bestehen aus einem Sägeblatt, zum Beispiel ein Diamantsägeblatt, welches an einem Sägekopf montiert ist, der wiederum am freien Ende eines Schwenkarms sitzt. Der Schwenkarm ist am Grundkörper der Wandsäge montiert und der Grundkörper lässt sich entlang einer Führungsschiene verschieben. Die Führungsschiene wird an einer Wand oder dergleichen angebracht und der Schwenkarm ermöglicht ein Eintauchen des Sägeblatts in die Wand.Wall saws allow you to cut through walls, ceilings and floors made of hard building materials such as concrete. The most common wall saws consist of a saw blade, for example a diamond saw blade, which is mounted on a saw head, which in turn sits on the free end of a swivel arm. The swivel arm is mounted on the base body of the wall saw and the base body can be moved along a guide rail. The guide rail is attached to a wall or the like and the swivel arm allows the saw blade to plunge into the wall.

Zum Schutz des Bedieners der im Hoch- und Tiefbau regelmäßig verwendeten Wandsäge befindet sich am Grundkörper der Wandsäge ein Blattschutzhalter mit zugehörigem Blattschutz. Bei bekannten Wandsägen erstreckt sich der Blattschutzhalter unabhängig von der Ausrichtung des Schwenkarms immer parallel zur Eintauchrichtung des Sägeblatts und umgibt dieses zumindest teilweise. Dadurch wird der Bediener einerseits vor direktem Kontakt mit dem Sägeblatt und anderseits auch vor indirektem Kontakt durch beispielsweise während des Sägens abgebrochene Teile des Sägeblatts geschützt.To protect the operator of the wall saw, which is regularly used in structural and civil engineering, there is a blade guard holder with associated blade guard on the base body of the wall saw. In known wall saws, the blade guard holder always extends parallel to the plunging direction of the saw blade and at least partially surrounds it, regardless of the orientation of the swivel arm. As a result, the operator is protected on the one hand from direct contact with the saw blade and on the other hand also from indirect contact, for example from parts of the saw blade that have broken off during sawing.

In EP 1 072 355 A2 wird eine Wandsäge mit Blattschutzhalter offenbart, bei welcher am Blattschutzhalter mithilfe von Markierungen die Eintauchtiefe des Sägeblatts angezeigt wird. Des Weiteren wird in EP 2 258 527 B1 eine Wandsäge mit einer Vorrichtung zum Verstellen eines am Sägearm der Wandsäge montierten Blattschutzhalters offenbart.In EP 1 072 355 A2 discloses a wall saw with a blade guard holder, in which the plunge depth of the saw blade is indicated on the blade guard holder using markings. Furthermore, in EP 2 258 527 B1 discloses a wall saw with a device for adjusting a blade guard holder mounted on the saw arm of the wall saw.

Bei einigen aus dem Stand der Technik bekannten Wandsägen mit Blattschutzhalter ist der Blattschutz mit einer am Grundkörper befestigten Linearführung montiert und wird über Führungsleisten angetrieben. Diese Führung ist sehr stark vom Untergrund abhängig. Das heißt bei Rillen oder Unebenheiten im Beton kann sich der Blattschutz nicht mehr ständig wandbündig mit der Säge mitbewegen. Dadurch öffnen sich immer wieder Spalte zwischen Wand und Blattschutz, durch welche abgebrochene Teile und Schmutz nach außen fliegen können.In some wall saws with a blade guard holder known from the prior art, the blade guard is mounted with a linear guide attached to the base body and is driven via guide rails. This tour is very dependent on the subsoil. This means that the blade guard can no longer constantly move if there are grooves or bumps in the concrete move flush with the wall with the saw. This keeps opening up gaps between the wall and blade guard, through which broken parts and dirt can fly out.

Des Weiteren bewegen sich bekannte Blattschutzvorrichtungen außerdem mithilfe von Führungsrollen, welche am offenen Ende des Blattschutzes montiert sind, entlang der Wand mit der Wandsäge mit, sobald das Sägeblatt soweit wie möglich in die Wand eingetaucht ist. Sollten diese kleinen Führungsrollen sich aufgrund der Betonsägearbeiten verschmutzen und dadurch klemmen, kann der Blattschutz nicht mehr an der Wand entlang gleiten. Außerdem ergeben sich bei vorhandenen Eckbohrungen Schwierigkeiten, da die Rollen in diese einfach hineinfallen.Furthermore, known blade guard devices also move along the wall with the wall saw by means of guide rollers, which are mounted on the open end of the blade guard, as soon as the saw blade has penetrated the wall as far as possible. If these small guide rollers get dirty due to the concrete sawing work and jam as a result, the blade guard can no longer slide along the wall. Difficulties also arise with existing corner holes, since the rollers simply fall into them.

KURZE BESCHREIBUNG DER ERFINDUNGBRIEF DESCRIPTION OF THE INVENTION

Aufgabe der vorliegenden Erfindung ist daher die Bereitstellung einer Wandsäge mit Schutzführung, welche eine synchrone Bewegung des Blattschutzes mit dem Sägeblatt beim Eintauchen bzw. Herausziehen aus der Wand oder dergleichen erlaubt, ohne ein vertikales Verschieben des Blattschutzes vorauszusetzen, welcher sich damit auch unabhängig vom vorherrschenden Untergrund gleichmäßig bewegt. Des Weiteren soll die Schutzführung in sehr einfacher Weise am Grundkörper der Wandsäge montiert bzw. demontiert werden können und es soll auf Führungsrollen am offenen Ende des Blattschutzes verzichtet werden können.The object of the present invention is therefore to provide a wall saw with a protective guide, which allows the blade guard to move synchronously with the saw blade when it is inserted or pulled out of the wall or the like, without requiring a vertical displacement of the blade guard, which can thus also be moved independently of the prevailing surface moved evenly. Furthermore, the protective guide should be able to be assembled and disassembled on the base body of the wall saw in a very simple manner and it should be possible to dispense with guide rollers at the open end of the blade guard.

Diese Aufgabe wird erfindungsgemäß durch eine Wandsäge gelöst, welche eine Sägeeinheit mit Schwenkarm und einem auf dem Schwenkarm montierbarem Sägeblatt, eine Blattschutzhalterung und eine Schutzführung umfasst, wobei die Schutzführung

  • einen ersten, an der Sägeeinheit fixierten Teilarm,
  • einen zweiten, am freien Ende des ersten Teilarms gelenkig fixierten, drehbaren Teilarm,
  • und einen dritten, gelenkig am zweiten Teilarm fixierten, drehbaren Teilarm
umfasst, wobei am freien Ende des dritten Teilarms die Blattschutzhalterung angebracht ist, an welcher der Blattschutz montierbar ist.According to the invention, this object is achieved by a wall saw which comprises a saw unit with a swivel arm and a saw blade that can be mounted on the swivel arm, a blade guard holder and a protective guide, the protective guide
  • a first partial arm fixed to the saw unit,
  • a second rotatable sub-arm articulated to the free end of the first sub-arm,
  • and a third rotatable sub-arm articulated to the second sub-arm
comprises, wherein the blade guard holder is attached to the free end of the third partial arm, on which the blade guard can be mounted.

Die Position der Schutzführung kann daher in Bezug auf die Längsachse des ersten Teilarms angegeben werden, da der erste Teilarm fix mit der Sägeeinheit verbunden ist und der einzige nicht drehbar gelagerte Teil der Schutzführung ist. Die Längsachse des ersten Teilarms steht dabei im Wesentlichen senkrecht auf die Sägeeinheit.The position of the protective guide can therefore be specified in relation to the longitudinal axis of the first sub-arm, since the first sub-arm is permanently connected to the saw unit and is the only one non-rotatably mounted part of the protective guide. The longitudinal axis of the first partial arm is essentially perpendicular to the saw unit.

Außerdem sind der zweite Teilarm und der Schwenkarm parallel ausgerichtet und synchron um die Längsachse des ersten Teilarms drehbar gelagert. Das heißt der zweite Teilarm dreht sich gleichzeitig mit dem Schwenkarm in dieselbe Richtung, wobei der zweite Teilarm und der Schwenkarm bzw. deren Längsachsen dabei ständig parallel zueinanderstehen.In addition, the second partial arm and the swivel arm are aligned in parallel and are mounted synchronously so as to be rotatable about the longitudinal axis of the first partial arm. This means that the second partial arm rotates simultaneously with the swivel arm in the same direction, with the second partial arm and the swivel arm or their longitudinal axes constantly being parallel to one another.

Außerdem ist der dritte Teilarm synchron in entgegengesetzter Richtung mit dem zweiten Teilarm um die Längsachse des ersten Teilarms drehbar gelagert. Dabei ist die Längsachse des dritten Teilarms genau dann parallel zur Längsachse des ersten Teilarms ausgerichtet, wenn auch die Längsachsen des zweiten Teilarms und des Schwenkarms parallel zur Längsachse des ersten Teilarms ausgerichtet sind. Das heißt die Längsachsen des zweiten Teilarms, des dritten Teilarms und des Schwenkarms stehen während den Umdrehungen immer zur selben Zeit senkrecht auf die Sägeeinheit. Auch in der Grundposition der Wandsäge sind die Längsachsen aller Teilarme der Schutzführung sowie die Längsachse des Schwenkarms parallel zueinander und senkrecht auf die Sägeeinheit ausgerichtet.In addition, the third sub-arm is rotatably mounted synchronously in the opposite direction with the second sub-arm about the longitudinal axis of the first sub-arm. The longitudinal axis of the third partial arm is aligned parallel to the longitudinal axis of the first partial arm when the longitudinal axes of the second partial arm and the pivot arm are also aligned parallel to the longitudinal axis of the first partial arm. This means that the longitudinal axes of the second partial arm, the third partial arm and the swivel arm are always perpendicular to the saw unit at the same time during the revolutions. Even in the basic position of the wall saw, the longitudinal axes of all partial arms of the protective guide and the longitudinal axis of the swivel arm are aligned parallel to one another and perpendicular to the saw unit.

Eine weitere Ausführungsvariante der erfindungsgemäßen Wandsäge ist gegeben durch die konstante Ausrichtung des am freien Ende des dritten Teilarms montierten Blattschutzhalters. Auch bei Drehung des dritten Teilarms bleibt die Ausrichtung des Blattschutzhalters unverändert, indem sich der Blattschutzhalter synchron und in entgegengesetzter Richtung zum dritten Teilarm dreht. Daher kann der Blattschutzhalter nicht drehfest mit dem gesamten dritten Teilarm verbunden sein.A further embodiment variant of the wall saw according to the invention is given by the constant alignment of the blade guard holder mounted on the free end of the third partial arm. Even when the third sub-arm rotates, the orientation of the blade guard holder remains unchanged, in that the blade guard holder rotates synchronously and in the opposite direction to the third sub-arm. Therefore, the blade guard holder cannot be connected in a rotationally fixed manner to the entire third sub-arm.

Da der Blattschutz direkt am Blattschutzhalter montiert ist, wird daher die Rotationsbewegung des Blattschutzhalters automatisch in eine Translationsbewegung des Blattschutzes übersetzt. Demnach bleibt der Abstand des Blattschutzes von der Wand auch bei einer Rotation des Schwenkarms, welche auch eine Rotation des Blattschutzhalters auslöst, unverändert. Das heißt der Spalt zwischen Blattschutz und Wand bleibt beim Herausziehen des Sägeblatts aus der Wand bzw. vor dem Eintauchen des Sägeblatts in die Wand immer unverändert.Therefore, since the blade guard is mounted directly to the blade guard holder, rotational movement of the blade guard holder is automatically translated into translational movement of the blade guard. Accordingly, the distance between the blade guard and the wall remains unchanged even when the swivel arm rotates, which also triggers a rotation of the blade guard holder. This means that the gap between the blade guard and the wall always remains unchanged when the saw blade is pulled out of the wall or before the saw blade plunges into the wall.

Zusätzlich sind die Größenverhältnisse des ersten, zweiten und dritten Teilarms genau so gewählt, dass bei synchroner Drehung aller Teilarme der Abstand des Blattschutzhalters zur Sägeeinheit im Wesentlichen gleich bleibt. Durch dieses und das obige Merkmal der erfindungsgemäßen Schutzführung verläuft der am Blattschutzhalter montierte Blattschutz somit immer direkt entlang der Wand, dem Boden oder der Decke, ohne den Abstand zur Wand oder dergleichen zu vergrößern. Bevorzugt ist der Blattschutz dabei an die Größe des Sägeblatts angepasst, um den größtmöglichen Schutz für den Bediener der Wandsäge zu ermöglichen. In einer Ausführungsvariante des erfindungsgemäßen Blattschutzes passt das gesamte Sägeblatt in den Blattschutz, sofern der Blattdurchmesser kleiner oder gleich 800 mm ist.In addition, the size ratios of the first, second and third sub-arms are chosen so that when all sub-arms rotate synchronously, the distance between the blade guard holder and the Saw unit essentially remains the same. Due to this and the above feature of the protective guide according to the invention, the blade guard mounted on the blade guard holder always runs directly along the wall, floor or ceiling without increasing the distance to the wall or the like. The blade guard is preferably adapted to the size of the saw blade in order to allow the greatest possible protection for the operator of the wall saw. In one embodiment of the blade guard according to the invention, the entire saw blade fits into the blade guard if the blade diameter is less than or equal to 800 mm.

In einer Ausführungsvariante der Wandsäge befindet sich in der Schutzführung ein Zahnradgetriebe.In one embodiment of the wall saw, there is a toothed gear in the protective guide.

Bevorzugt befinden sich im ersten Teilarm zumindest zwei übereinander angeordnete, miteinander kämmende Zahnräder, im zweiten Teilarm zumindest drei miteinander kämmende Zahnräder und im dritten Teilarm zumindest drei miteinander kämmende Zahnräder. Da sich die Drehrichtung von drehbar gelagerten, aufeinanderfolgenden Zahnräder ständig ändert, ist vor allem wichtig, ob sich eine gerade oder ungerade Anzahl an drehbaren Zahnrädern in den Teilarmen befindet.There are preferably at least two mutually meshing toothed wheels arranged one above the other in the first partial arm, at least three mutually meshing toothed wheels in the second partial arm and at least three mutually meshing toothed wheels in the third partial arm. Since the direction of rotation of rotatably mounted, consecutive gear wheels is constantly changing, it is particularly important whether there is an even or odd number of rotatable gear wheels in the sub-arms.

Obwohl sich der zweite Teilarm und der Schwenkarm gleichgerichtet drehen, befinden sich im ersten Teilarm ebenfalls eine gerade Anzahl an Zahnrädern, da das Hauptantriebszahnrad in der Sägeeinheit verbaut ist und nicht im ersten Teilarm. Genauer gesagt befindet sich in der Sägeeinheit ein Hauptantriebszahnrad, welches koaxial unter dem Schwenkarm angeordnet ist. Des Weiteren befindet sich in der Sägeeinheit über dem Hauptantriebszahnrad zumindest ein Hilfsantriebszahnrad, welches mit dem Hauptantriebszahnrad kämmt.Although the second sub-arm and the swivel arm rotate in the same direction, there is also an even number of gears in the first sub-arm, since the main drive gear is installed in the saw unit and not in the first sub-arm. More precisely, in the saw unit there is a main drive gear which is arranged coaxially under the swing arm. Furthermore, there is at least one auxiliary drive gear in the saw unit above the main drive gear, which meshes with the main drive gear.

Das Hauptantriebszahnrad ist mithilfe einer Hauptantriebswelle drehfest mit dem Schwenkarm verbunden und dreht sich somit gleichgerichtet und synchron mit dem Schwenkarm. Das Hilfsantriebszahnrad ist mithilfe einer ersten Antriebswelle drehfest mit dem Antriebszahnrad im ersten Teilarm verbunden. Das Antriebszahnrad im ersten Teilarm dreht sich somit gleichgerichtet und synchron mit dem Hilfsantriebszahnrad.The main drive gear is non-rotatably connected to the swivel arm by means of a main drive shaft and thus rotates in the same direction and synchronously with the swivel arm. The auxiliary drive gear is non-rotatably connected to the drive gear in the first sub-arm by means of a first drive shaft. The drive gear in the first sub-arm thus rotates in the same direction and synchronously with the auxiliary drive gear.

Außerdem verbindet eine zweite Antriebswelle den ersten Teilarm und den zweiten Teilarm miteinander, wobei das endständige Zahnrad im ersten Teilarm und der zweite Teilarm drehfest mit der zweiten Antriebswelle verbunden sind. Das heißt der zweite Teilarm dreht sich gleichgerichtet und synchron mit dem endständigen Zahnrad im ersten Teilarm, welches vom Hauptantriebszahnrad angetrieben wird.In addition, a second drive shaft connects the first sub-arm and the second sub-arm to one another, with the terminal gear wheel in the first sub-arm and the second sub-arm being non-rotatably connected to the second drive shaft. This means that the second partial arm rotates rectified and synchronous with the terminal gear in the first sub-arm, which is driven by the main drive gear.

Da sich der zweite Teilarm wie oben beschrieben synchron mit dem Schwenkarm in die gleiche Richtung drehen soll, können aufgrund des beschriebenen Aufbaus des Zahnradgetriebes im ersten Teilarm nur eine gerade Anzahl an drehbaren, miteinander kämmenden Zahnrädern übereinander verbaut werden, da das Hauptantriebszahnrad sich gleichgerichtet mit dem Schwenkarm dreht und das Antriebszahnrad im ersten Teilarm sich in die entgegengesetzte Richtung dreht. Daher dreht sich nur so der zweite Teilarm gleichgerichtet mit dem Schwenkarm.Since, as described above, the second sub-arm should rotate synchronously with the swivel arm in the same direction, only an even number of rotatable, meshing gears can be installed one above the other in the first sub-arm due to the described structure of the gear mechanism, since the main drive gear is aligned with the Swivel arm rotates and the drive gear wheel in the first sub-arm rotates in the opposite direction. This is the only way that the second partial arm rotates in the same direction as the swivel arm.

In einer weiteren Ausführungsvariante umfasst der zweite Teilarm vorzugsweise ein zweistufiges Zahnradgetriebe mit jeweils zumindest drei miteinander kämmende Zahnräder in der ersten und zweiten Getriebestufe. Dabei sind das erste Zahnrad der ersten Getriebestufe und das erste Zahnrad der zweiten Getriebestufe drehfrei und koaxial über dem endständigen Zahnrad im ersten Teilarm angeordnet. Das heißt diese zwei Zahnräder drehen sich nicht. Das endständige Zahnrad der ersten Getriebestufe ist drehfest mit dem dritten Teilarm verbunden, wobei das erste Zahnrad der ersten Getriebestufe doppelt so groß wie das endständige Zahnrad der ersten Getriebestufe ist, wobei das erste Zahnrad der zweiten Getriebestufe gleich groß wie das endständige Zahnrad der zweiten Getriebestufe ist.In a further embodiment variant, the second sub-arm preferably comprises a two-stage gear train with at least three meshing gear wheels in the first and second gear stage. The first gear wheel of the first gear stage and the first gear wheel of the second gear stage are non-rotatable and arranged coaxially above the terminal gear wheel in the first partial arm. That is, these two gears do not rotate. The terminal gear wheel of the first gear stage is non-rotatably connected to the third partial arm, with the first gear wheel of the first gear stage being twice the size of the terminal gear wheel of the first gear stage, with the first gear wheel of the second gear stage being the same size as the terminal gear wheel of the second gear stage .

Durch diese Anordnung der Zahnräder des zweistufigen Zahnradgetriebes im zweiten Teilarm dreht sich der dritte Teilarm, welcher vom ersten Zahnrad der ersten Getriebestufe angetrieben wird, entgegengesetzt zum zweiten Teilarm.Due to this arrangement of the gear wheels of the two-stage gear transmission in the second partial arm, the third partial arm, which is driven by the first gear wheel of the first gear stage, rotates in the opposite direction to the second partial arm.

Bevorzugt verbindet eine ruhende Welle zusätzlich das endständige Zahnrad der zweiten Getriebestufe mit dem ersten Zahnrad im dritten Teilarm drehfrei und koaxial übereinander. Dabei ist zwischen dem endständigen Zahnrad der zweiten Getriebestufe und dem ersten Zahnrad im dritten Teilarm das endständige Zahnrad der ersten Getriebestufe angeordnet, aber nicht mit der ruhenden Welle verbunden. Das heißt, das endständige Zahnrad der zweiten Getriebestufe und das erste Zahnrad im dritten Teilarm drehen sich nicht bzw. nur mit dem zweiten Teilarm mit, da die ruhende Welle mit diesem verbunden ist.A stationary shaft preferably also connects the terminal gear wheel of the second gear stage to the first gear wheel in the third sub-arm in a non-rotating manner and coaxially one above the other. The terminal gear wheel of the first gear stage is arranged between the terminal gear wheel of the second gear stage and the first gear wheel in the third partial arm, but is not connected to the stationary shaft. This means that the terminal gear wheel of the second gear stage and the first gear wheel in the third partial arm do not rotate or only rotate with the second partial arm, since the stationary shaft is connected to it.

Durch die oben beschriebene Anordnung mit dem zweifachen Zahnradgetriebe im zweiten Teilarm können sich in jeder der Getriebestufen nur eine ungerade Anzahl an miteinander kämmenden Zahnrädern übereinander befinden, da sowohl jeweils das erste Zahnrad des ersten und zweiten Getriebes, als auch jeweils das endständige Zahnrad des ersten und zweiten Getriebes drehfrei gelagert sind. Damit sich der dritte Teilarm synchron, aber in entgegengesetzter Richtung zum Schwenkarm und zum zweiten Teilarm dreht, ergibt sich die obige Bedingung an die Anzahl der Zahnräder im zweistufigen Getriebe.Due to the arrangement described above with the double gear train in the second sub-arm, only an odd number of meshing gear wheels can be located one above the other in each of the gear stages, since both the first gear wheel of the first and second gear mechanism and the terminal gear wheel of the first and second gear are mounted non-rotatably. So that the third partial arm rotates synchronously, but in the opposite direction to the swivel arm and the second partial arm, the above condition applies to the number of gears in the two-stage gear.

Damit die Ausrichtung des Blattschutzhalters, welcher am freien Ende des dritten Teilarms montiert ist, und somit auch die Ausrichtung des Blattschutzes während der Drehung des dritten Teilarms gleichgerichtet bleibt, ist der Blattschutzhalter drehfest mit dem endständigen Zahnrad im dritten Teilarm verbunden, wobei das endständige Zahnrad im dritten Teilarm drehbar im dritten Teilarm gelagert ist. Das heißt der Blattschutzhalter dreht sich gleichgerichtet und synchron mit dem endständigen Zahnrad im dritten Teilarm. Der Blattschutzhalter muss sich in die entgegengesetzte Richtung zum dritten Teilarm und halb so schnell wie dieser drehen, um dessen Drehung auszugleichen und die Ausrichtung eines montierten Blattschutzes konstant zu halten. Daher sind auch im dritten Teilarm eine ungerade Anzahl an Zahnrädern, bevorzugt drei Zahnräder, verbaut, da sich das erste Zahnrad im dritten Teilarm wie oben beschrieben nicht dreht. Außerdem ist das erste Zahnrad im dritten Teilarm gleich groß wie das endständige Zahnrad im dritten Teilarm. Durch die beschriebenen Größenverhältnisse der Zahnräder im zweiten Teilarm welche einerseits den dritten Teilarm antreiben und andererseits den Blattschutzhalter antreiben, ergibt sich die gewünschte Übersetzung. Genauer gesagt, dreht sich bevorzugt der dritte Teilarm doppelt so schnell wie der Blattschutzhalter.So that the orientation of the blade guard holder, which is mounted on the free end of the third arm section, and thus also the orientation of the blade guard during the rotation of the third arm section, remains the same, the blade guard holder is non-rotatably connected to the terminal gear wheel in the third section arm, with the terminal gear wheel in the third sub-arm is rotatably mounted in the third sub-arm. This means that the blade guard holder rotates in the same direction and synchronously with the terminal gear wheel in the third sub-arm. The blade guard holder must rotate in the opposite direction to and half the speed of the third sub-arm to compensate for its rotation and to keep the alignment of an installed blade guard constant. Therefore, an odd number of gear wheels, preferably three gear wheels, are also installed in the third sub-arm, since the first gear wheel in the third sub-arm does not rotate, as described above. In addition, the first gear in the third sub-arm is the same size as the terminal gear in the third sub-arm. The desired gear ratio results from the described size ratios of the gears in the second partial arm, which on the one hand drive the third partial arm and on the other hand drive the blade guard holder. More specifically, the third sub-arm preferably rotates twice as fast as the blade guard holder.

Diese bevorzugte Anordnung der Zahnräder in der Schutzführung der Wandsäge erlaubt, dass bei montiertem Sägeblatt der Blattschutz ständig den gesamten, nicht in die Wand eingetauchten Teil des Sägeblattes umgibt und sich automatisch mit dem Sägeblatt und aufgrund der Größenverhältnisse der Teilarme der Schutzführung immer entlang der Wand mitbewegt.This preferred arrangement of the gears in the protective guide of the wall saw allows that when the saw blade is mounted, the blade guard constantly surrounds the entire part of the saw blade that is not immersed in the wall and always moves along the wall automatically with the saw blade and due to the proportions of the partial arms of the protective guide .

DETAILLIERTE BESCHREIBUNG DER ERFINDUNGDETAILED DESCRIPTION OF THE INVENTION

Die erfindungsgemäße Wandsäge umfasst einen Schwenkarm mit darauf montiertem Sägeblatt sowie einen Blattschutz mit Schutzführung. Über die Schutzführung ist die Bewegung des Blattschutzes an das Eintauchen und Herausziehen des Sägeblattes aus einer Wand gekoppelt.The wall saw according to the invention comprises a swivel arm with a saw blade mounted thereon and a blade guard with a protective guide. The movement of the blade guard is coupled to the plunging and pulling out of the saw blade from a wall via the guard guide.

Der Grundkörper der Wandsäge ist dabei entlang einer an der Wand montierten Führungsschiene bewegbar. Die Länge der Führungsschiene kennzeichnet den Arbeitsbereich der Wandsäge. Eine Änderung des Arbeitsbereiches ist nur durch eine Veränderung der Führungsschienen-Position möglich, genauer gesagt durch einen Ab- und Aufbau der Führungsschiene.The base body of the wall saw can be moved along a guide rail mounted on the wall. The length of the guide rail indicates the working area of the wall saw. The working range can only be changed by changing the position of the guide rails, more precisely by dismantling and assembling the guide rail.

Um die Erfindung besser zu veranschaulichen, werden die wesentlichen Merkmale anhand von bevorzugten Ausführungsformen der erfindungsgemäßen Wandsäge in folgenden Figuren dargestellt.In order to better illustrate the invention, the essential features are shown in the following figures on the basis of preferred embodiments of the wall saw according to the invention.

Es zeigt:

  • Fig. 1 eine Schutzführung mit Zahnradgetriebe in Vorderansicht mit montiertem Blattschutzhalter.
  • Fig. 2 eine Vorderansicht des Grundkörpers der Wandsäge mit an der Sägeeinheit montierter Schutzführung und Zahnradgetriebe in Grundstellung ohne montiertem Blattschutzhalter.
  • Fig. 3 eine Vorderansicht des Grundkörpers der Wandsäge mit an der Sägeeinheit montierter Schutzführung und Zahnradgetriebe in Auslenkung aus der Grundstellung mit montiertem Blattschutzhalter.
It shows:
  • 1 a front view of a protective guide with toothed gears with the blade guard holder fitted.
  • 2 a front view of the base body of the wall saw with the saw unit mounted protective guide and gear in the basic position without mounted blade guard holder.
  • 3 a front view of the base body of the wall saw with the saw unit mounted protective guide and gear in deflection from the basic position with mounted blade guard holder.

Die Figuren zeigen die Schutzführung einer Wandsäge mit einem Blattschutzhalter 6, auf welchem der Blattschutz der Wandsäge montiert werden kann.The figures show the protective guide of a wall saw with a blade guard holder 6, on which the blade guard of the wall saw can be mounted.

In Fig. 1 ist nur die Schutzführung dargestellt, welche einen ersten, an der Sägeeinheit 13 fixierten Teilarm 1, einen zweiten, am freien Ende des ersten Teilarms 1 gelenkig fixierten, drehbaren Teilarm 2 und einen dritten, gelenkig am zweiten Teilarm 2 fixierten, drehbaren Teilarm 3 umfasst. Am freien Ende des dritten Teilarms 3 ist eine Blattschutzhalterung 6 angebracht, an welcher der Blattschutz (aus Übersichtlichkeitsgründen nicht gezeigt) montierbar ist.In 1 only the protective guide is shown, which comprises a first arm part 1 fixed to the saw unit 13, a second, rotatable arm part 2, fixed in an articulated manner to the free end of the first arm part 1, and a third, rotatable arm part 3, fixed in an articulated manner to the second arm part 2. Attached to the free end of the third partial arm 3 is a blade guard holder 6, on which the blade guard (not shown for reasons of clarity) can be mounted.

Fig. 2 und Fig. 3 zeigen zusätzlich noch den Schwenkarm 4, welcher am Grundkörper der Wandsäge gelenkig fixiert ist und auf welchem das Sägeblatt montierbar ist. Der zweite Teilarm 2 und der Schwenkarm 4 sind in der Grundstellung der Wandsäge wie in Fig. 2 ersichtlich parallel ausgerichtet und synchron um die Längsachse des ersten Teilarms 1 drehbar gelagert. Zusätzlich ist der dritte Teilarm 3 in entgegengesetzter Richtung mit dem zweiten Teilarm 2 synchron um die Längsachse des ersten Teilarms 1 drehbar gelagert und in Grundstellung ebenfalls parallel zum zweiten Teilarm 2 und dem Schwenkarm 4 ausgerichtet. 2 and 3 additionally show the swivel arm 4, which is articulated to the base body of the wall saw and on which the saw blade can be mounted. The second arm 2 and the swivel arm 4 are in the basic position of the wall saw as in 2 oriented in parallel as can be seen and rotatably mounted synchronously about the longitudinal axis of the first partial arm 1 . In addition, the third arm part 3 is mounted synchronously in the opposite direction with the second arm part 2 so that it can rotate around the longitudinal axis of the first arm part 1 and is also aligned parallel to the second arm part 2 and the swivel arm 4 in the normal position.

Die in Fig. 2 dargestellte Grundstellung der Wandsäge ist dabei jene Ausrichtung des Schwenkarms 4 und der Schutzführung, welche diese beim Anbringen des Grundkörpers an der Führungsschiene aufweisen. Gleichzeitig ist die auch die einzige Stellung, bei der bei montiertem Sägeblatt dieses nicht in die Wand eintaucht. Erst nachdem sich der Schwenkarm 4 zu drehen beginnt, taucht das Sägeblatt in die Wand ein.In the 2 The basic position of the wall saw shown is the orientation of the swivel arm 4 and the protective guide that they have when the basic body is attached to the guide rail. At the same time, this is also the only position in which the saw blade does not dip into the wall when the saw blade is mounted. Only after the swivel arm 4 begins to rotate does the saw blade dip into the wall.

Nur in der Grundstellung der Wandsäge, wie in Fig. 2 deutlich zu sehen, sind demnach gleichzeitig die Längsachse des dritten Teilarms 3 parallel zur Längsachse des ersten Teilarms 1 und die Längsachsen des zweiten Teilarms 2 und des Schwenkarms 4 parallel zur Längsachse des ersten Teilarms 1 ausgerichtet.Only in the basic position of the wall saw, as in 2 clearly to see, the longitudinal axis of the third partial arm 3 is aligned parallel to the longitudinal axis of the first partial arm 1 and the longitudinal axes of the second partial arm 2 and the swivel arm 4 parallel to the longitudinal axis of the first partial arm 1.

Des Weiteren ist anhand der Figuren ersichtlich, dass die Ausrichtung der Blattschutzhalterung 6 bei Drehung des dritten Teilarms 3 unverändert bleibt. Dabei ändert sich auch der Abstand der Blattschutzhalterung 6 zur Sägeeinheit 13 nicht.Furthermore, it can be seen from the figures that the alignment of the blade guard holder 6 remains unchanged when the third partial arm 3 rotates. The distance between the blade guard holder 6 and the saw unit 13 does not change either.

In den Figuren ist außerdem ein beispielhaftes Zahnradgetriebe in der Schutzführung und am Grundkörper der Wandsäge dargestellt. Dabei sind im ersten Teilarm 1 in Fig. 1 sechs übereinander angeordnete, miteinander kämmende Zahnräder eingebaut, wobei das unterste Zahnrad im ersten Teilarm 1 das Antriebszahnrad 7 im ersten Teilarm 1 und das oberste Zahnrad im ersten Teilarm 1 das endständige Zahnrad 8 im ersten Teilarm 1 ist. Alle Zahnräder im ersten Teilarm 1 dienen dem Antrieb des zweiten Teilarms 2, welcher über eine zweite Antriebswelle drehfest mit dem endständigen Zahnrad 8 im ersten Teilarm 1 verbunden ist. Da sich eine gerade Anzahl an Zahnrädern im ersten Teilarm 1 befindet, dreht sich der zweite Teilarm 2 synchron und gleichgerichtet mit dem Schwenkarm 4.The figures also show an exemplary gear drive in the protective guide and on the base body of the wall saw. In the first sub-arm, 1 in 1 six intermeshing gears arranged one above the other, the bottom gear in the first partial arm 1 being the drive gear 7 in the first partial arm 1 and the top gear in the first partial arm 1 being the terminal gear 8 in the first partial arm 1. All gears in the first partial arm 1 are used to drive the second partial arm 2, which is non-rotatably connected to the terminal gear 8 in the first partial arm 1 via a second drive shaft. Since there is an even number of gears in the first partial arm 1, the second partial arm 2 rotates synchronously and in the same direction as the swivel arm 4.

Der Schwenkarm 4 ist wie in Fig. 2 gezeigt über die Hauptantriebswelle drehfest mit dem Hauptantriebszahnrad 14 verbunden. Das Hauptantriebszahnrad 14 ist Teil der Sägeeinheit 13 und kämmt mit dem Hilfsantriebszahnrad 14', welches koaxial über dem Antriebszahnrad 7 im ersten Teilarm 1 angeordnet ist und mit diesem über eine erste Antriebswelle drehfest verbunden ist. Das Hauptantriebszahnrad 14 treibt somit einerseits den Schwenkarm 4 an und andererseits über das Getriebe im ersten Teilarm 1 den zweiten Teilarm 2.The swivel arm 4 is as in 2 shown non-rotatably connected to the main drive gear 14 via the main drive shaft. The main drive gear 14 is part of the saw unit 13 and meshes with the auxiliary drive gear 14 ', which coaxially above the drive gear 7 in first sub-arm 1 is arranged and is rotatably connected to this via a first drive shaft. The main drive gear 14 thus drives the swivel arm 4 on the one hand and the second arm part 2 via the gearing in the first arm part 1 on the other hand.

Der zweite Teilarm 2 umfasst bevorzugt ein zweistufiges Zahnradgetriebe. Dabei ist die erste Getriebestufe über der zweiten Getriebestufe angeordnet. Beide Getriebestufen umfassen zumindest drei miteinander kämmende Zahnräder. Das erste Zahnrad der zweiten Getriebestufe 9' und das erste Zahnrad der ersten Getriebestufe 9 befinden sich wie in Fig. 3 gezeigt koaxial über dem endständigen Zahnrad im ersten Teilarm 1 & . Im Gegensatz zu diesem Zahnrad sind das erste Zahnrad der ersten Getriebestufe 9 und das erste Zahnrad der zweiten Getriebestufe 9' jedoch drehfrei mit dem zweiten Teilarm 2 verbunden. Das heißt, diese beiden Zahnräder sind nicht mit der zweiten Antriebswelle verbunden, welche den zweiten Teilarm 2 antreibt.The second partial arm 2 preferably comprises a two-stage gear transmission. The first gear stage is arranged above the second gear stage. Both gear stages include at least three meshing gears. The first gear wheel of the second gear stage 9' and the first gear wheel of the first gear stage 9 are located as in FIG 3 shown coaxially over the terminal gear in the first sub-arm 1 & . In contrast to this gear wheel, however, the first gear wheel of the first gear stage 9 and the first gear wheel of the second gear stage 9' are connected to the second partial arm 2 in a non-rotating manner. That is, these two gears are not connected to the second drive shaft which drives the second sub-arm 2.

Die erste Getriebestufe im zweiten Teilarm 2 dient nun dem Antrieb des dritten Teilarms 3, während die zweite Getriebestufe im zweiten Teilarm 2 direkt mit dem Zahnradgetriebe im dritten Teilarm 3 verbunden ist und daher für die vertikale Ausrichtung des Blattschutzhalters 6 zuständig ist.The first gear stage in the second arm section 2 is now used to drive the third arm section 3, while the second gear stage in the second arm section 2 is connected directly to the gear mechanism in the third arm section 3 and is therefore responsible for the vertical alignment of the blade guard holder 6.

Genauer gesagt, ist wie in Fig. 2 dargestellt das endständige Zahnrad 10 der ersten Getriebestufe 9 drehfest mit dem dritten Teilarm 3 verbunden. Fig. 3 zeigt das endständige Zahnrad 10' der zweiten Getriebestufe 9', welches durch eine ruhende Welle mit dem ersten Zahnrad im dritten Teilarm 11 verbunden ist. Zwischen dem endständigen Zahnrad 10 der ersten Getriebestufe 9 und dem endständigen Zahnrad 10' der zweiten Getriebestufe 9', welche beide wiederrum drehfrei im zweiten Teilarm 2 gelagert sind, befindet sich jeweils zumindest ein drehendes Zahnrad. Durch die Anordnung der Zahnräder in der ersten Getriebestufe des zweiten Teilarms 2 dreht sich der dritte Teilarm 3 in entgegengesetzter Richtung zum zweiten Teilarm 2.More specifically, is as in 2 shown the terminal gear 10 of the first gear stage 9 rotatably connected to the third sub-arm 3. 3 shows the terminal gear wheel 10' of the second gear stage 9', which is connected to the first gear wheel in the third partial arm 11 by a stationary shaft. Between the terminal gear 10 of the first gear stage 9 and the terminal gear 10' of the second gear stage 9', both of which are in turn mounted non-rotatably in the second sub-arm 2, there is at least one rotating gear in each case. Due to the arrangement of the gears in the first gear stage of the second partial arm 2, the third partial arm 3 rotates in the opposite direction to the second partial arm 2.

Um die passende Übersetzung der Zahnräder und damit die richtige Ausrichtung des Blattschutzhalters 6 und dem darauf montierbaren Blattschutzhalter zu gewährleisten, sind die Größenverhältnisse der Zahnräder des zweistufigen Zahnradgetriebes im zweiten Teilarm 2 folgendermaßen gewählt: Das erste Zahnrad der ersten Getriebestufe 9 ist doppelt so groß wie das endständige Zahnrad der ersten Getriebestufe 10. Das erste Zahnrad der zweiten Getriebestufe 9' ist gleich groß wie das endständige Zahnrad 10' der zweiten Getriebestufe 9'.In order to ensure the right translation of the gears and thus the correct alignment of the blade guard holder 6 and the blade guard holder that can be mounted on it, the size ratios of the gear wheels of the two-stage gear train in the second partial arm 2 selected as follows: The first gear wheel of the first gear stage 9 is twice as large as the terminal gear wheel of the first gear stage 10. The first gear wheel of the second gear stage 9' is the same size as the terminal gear wheel 10' of the second gear stage 9'.

Alle restlichen Antriebszahnräder und deren zugehörige endständige Zahnräder sind jeweils gleich groß, wodurch das Übersetzungsverhältnis gleich eins ist.All of the remaining drive gears and their associated terminal gears are each the same size, making the gear ratio equal to one.

Wie in Fig. 2 gezeigt befinden sich im dritten Teilarm 3 zumindest drei miteinander kämmende Zahnräder. Wie oben beschrieben ist das erste Zahnrad 11 im dritten Teilarm 3 über eine ruhende Welle mit dem endständigen Zahnrad 10' der zweiten Getriebestufe 9' verbunden. Die ruhende Welle ist dabei mit dem zweiten Teilarm 2 verbunden. Das heißt das erste Zahnrad 11 im dritten Teilarm 3 liegt wiederum drehfrei im dritten Teilarm 3 und dreht sich nicht mit diesem mit. Zwischen dem koaxial übereinander angeordneten endständigem Zahnrad 10' der zweiten Getriebestufe 9' angeordneten ersten Zahnrad im dritten Teilarm 3 liegt das endständige Zahnrad 10 der ersten Getriebestufe 9, welches drehfest mit dem dritten Teilarm 3 verbunden ist und diesen antreibt.As in 2 shown are in the third sub-arm 3 at least three meshing gears. As described above, the first gear wheel 11 in the third partial arm 3 is connected to the terminal gear wheel 10' of the second gear stage 9' via a stationary shaft. The shaft at rest is connected to the second partial arm 2 . This means that the first gearwheel 11 in the third partial arm 3 is in turn free of rotation in the third partial arm 3 and does not rotate with it. Between the coaxially stacked terminal gear 10' of the second gear stage 9' in the third partial arm 3 is the terminal gear 10 of the first gear stage 9, which is non-rotatably connected to the third partial arm 3 and drives it.

Das endständige Zahnrad 12 im dritten Teilarm 3 ist drehfest mit dem Blattschutzhalter 6 verbunden und treibt diesen an. Durch die Anordnung der Zahnräder im dritten Teilarm 3 und die Anordnung der zweiten Getriebestufe im zweiten Teilarm 2 dreht sich der Blattschutzhalter 6 gleichgerichtet mit dem zweiten Teilarm 2 und entgegengesetzt zum dritten Teilarm 3. Die unterschiedlichen Größenverhältnisse der jeweiligen ersten Zahnräder der ersten und zweiten Getriebestufe 9, 9' zu den jeweiligen endständigen Zahnrädern 10, 10' der ersten und zweiten Getriebestufe 9, 9' bewirken, dass sich der dritte Teilarm 3 doppelt so schnell wie der Blattschutzhalter 6 dreht, wodurch dessen vertikale Ausrichtung bei Drehung des dritten Teilarms 3 unverändert bleibt. Dadurch bewegt sich ein am Blattschutzhalter 6 montierter Blattschutz entlang der Führungsschienen mit, bleibt dabei aber stets wandbündig und verändert nie seinen Abstand zur Wand.The terminal gear 12 in the third sub-arm 3 is connected in a rotationally fixed manner to the blade guard holder 6 and drives it. Due to the arrangement of the gears in the third partial arm 3 and the arrangement of the second gear stage in the second partial arm 2, the blade guard holder 6 rotates in the same direction as the second partial arm 2 and in the opposite direction to the third partial arm 3. The different size ratios of the respective first gears of the first and second gear stage 9 , 9' to the respective terminal gears 10, 10' of the first and second gear stages 9, 9' cause the third sub-arm 3 to rotate twice as fast as the blade guard holder 6, whereby its vertical orientation remains unchanged when the third sub-arm 3 rotates . As a result, a blade guard mounted on the blade guard holder 6 moves along the guide rails, but always remains flush with the wall and never changes its distance from the wall.

Mithilfe der erfindungsgemäßen Schutzführung bewegt sich daher ein am Blattschutzhalter 6 montierter Blattschutz mit dem Schwenkarm 4, auf welchem das Sägeblatt montiert wird, mit. Zusätzlich kann beim Sägen ohne Blattschutz dieser einfach abgenommen werden, ohne den gesamten Blattschutzhalter 6 abzumontieren. Außerdem erlaubt die erfindungsgemäße Schutzführung einen Blattschutz ohne Führungsrollen zu verwenden, wodurch der Blattschutz selbst auf unebenen Untergründen den größtmöglichen Schutz bietet.With the help of the protective guide according to the invention, a blade guard mounted on the blade guard holder 6 therefore moves with the swivel arm 4 on which the saw blade is mounted. In addition, when sawing without a blade guard, this can be easily removed without dismantling the entire blade guard holder 6. In addition, the invention allows Protective guide to use a blade guard without guide rollers, which means that the blade guard offers the greatest possible protection even on uneven surfaces.

Claims (14)

  1. A wall saw, comprising a saw unit (13) having a swivel arm (4) and a saw blade mountable on the swivel arm, a blade guard holder (6) and a guard guide, characterized in that the guard guide comprises
    • a first partial arm (1) fixed to the saw unit (13),
    • a second, rotatable partial arm (2), which is fixed in an articulated manner to the free end of the first partial arm (1),
    • and a third rotatable partial arm (3), which is fixed in an articulated manner to the second partial arm (2), wherein the blade guard holder (6), to which a blade guard may be mounted, is attached to the free end of the third partial arm (3).
  2. A wall saw according to claim 1, characterised in that the second partial arm (2) and the swivel arm (4) are oriented in parallel and are mounted so as to be rotatable synchronously about the longitudinal axis of the first partial arm (1).
  3. A wall saw according to claim 2, characterized in that the third partial arm (3) is mounted rotatably in the opposite direction with the second partial arm (2) synchronously about the longitudinal axis of the first partial arm (1),
    wherein the longitudinal axis of the third partial arm (3) is oriented in parallel to the longitudinal axis of the first partial arm (1) precisely if the longitudinal axes of the second partial arm (2) and of the swivel arm (4) are also oriented in parallel to the longitudinal axis of the first partial arm (1).
  4. A wall saw according to any of the claims 1 to 3, characterized in that the orientation of the blade guard holder (6) remains unchanged during rotation of the third partial arm (3), wherein also the distance between the blade guard holder (6) and the saw unit (13) remains unchanged during rotation of the third partial arm (3).
  5. A wall saw according to any of the claims 1 to 4, characterized by a blade guard, wherein the hollow internal space of the blade guard is adjusted to the size of the saw blade, wherein preferably saw blades having a blade diameter of maximum 800 mm may be completely inserted into the blade guard.
  6. A wall saw according to any one of the claims 1 to 5, characterized by a gear in the guard guide.
  7. A wall saw according to claim 6, wherein in the first partial arm (1), in the second partial arm (2) and in the third partial arm (3) there are respectively installed at least two gear wheels arranged one above the other and meshing with one another,
    wherein a main drive gear wheel (14) and at least one auxiliary drive gear wheel (14') are installed in the saw unit (13),
    wherein the main drive gear wheel (14) and the at least one auxiliary drive gear wheel (14') mesh with each other.
  8. A wall saw according to claim 7, characterized by a main drive shaft, which connects the swivel arm (4) and the main drive gear wheel (14) to one another in a rotationally fixed manner.
  9. A wall saw according to any of the claims 7 and 8, characterized by a first drive shaft, which connects the drive gear wheel in the first partial arm (7) and the auxiliary drive gear wheel (14') to one another in a rotationally fixed manner,
    wherein the auxiliary drive gear wheel (14') is arranged coaxially above the drive gear wheel in the first partial arm (7).
  10. A wall saw according to any one of the claims 7 to 9, characterized by a second drive shaft, which connects the first partial arm (1) and the second partial arm (2) to one another,
    wherein the terminal gear wheel in the first partial arm (8) and the second partial arm (2) are connected to the second drive shaft in a rotationally fixed manner.
  11. A wall saw according to any one of the claims 7 to 10, characterized by a two-stage gear in the second partial arm (2) comprising respectively at least three inter-meshing gear wheels in the first and second transmission stages,
    wherein the first gear wheel of the first gear stage (9) and the first gear wheel of the second gear stage (9') are arranged rotationally free and coaxially above the terminal gear wheel in the first partial arm (8),
    wherein the terminal gear wheel of the first gear stage (10) is connected in a rotationally fixed manner to the third partial arm (3),
    wherein the first gear wheel of the first gear stage (9) is twice as large as the terminal gear wheel of the first gear stage (10),
    wherein the first gear wheel of the second gear stage (9') is the same size as the terminal gear wheel of the second gear stage (10').
  12. A wall saw according to claim 11, characterized by a stationary shaft, which connects the terminal gear wheel of the second gear stage (10') to the first gear wheel in the third partial arm (11) in a rotationally free manner and coaxially one above the other,
    wherein the terminal gear wheel of the first gear stage (10) is arranged between the terminal gear wheel of the second gear stage (10') and the first gear wheel in the third partial arm (11).
  13. A wall saw according to claim 12, characterized by at least three inter-meshing gear wheels in the third partial arm (3),
    wherein the first gear wheel in the third partial arm (11) is of the same size as the terminal gear wheel in the third partial arm (12).
  14. A wall saw according to any of the claims 7 to 11, characterized in that the blade guard holder (6) is connected in a rotationally fixed manner to the terminal gear wheel in the third partial arm (12).
EP19212507.8A 2019-11-29 2019-11-29 Wall saw with guide for saw blade guard Active EP3827952B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19212507.8A EP3827952B1 (en) 2019-11-29 2019-11-29 Wall saw with guide for saw blade guard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19212507.8A EP3827952B1 (en) 2019-11-29 2019-11-29 Wall saw with guide for saw blade guard

Publications (2)

Publication Number Publication Date
EP3827952A1 EP3827952A1 (en) 2021-06-02
EP3827952B1 true EP3827952B1 (en) 2022-08-17

Family

ID=68762436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19212507.8A Active EP3827952B1 (en) 2019-11-29 2019-11-29 Wall saw with guide for saw blade guard

Country Status (1)

Country Link
EP (1) EP3827952B1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933145A1 (en) 1999-07-20 2001-01-25 Hilti Ag Sawing device
DE102009026638A1 (en) 2009-06-02 2010-12-16 Hilti Aktiengesellschaft Device for adjusting a blade guard of a wall saw

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