EP3827952B1 - Scie murale avec guide pour protège-lame de scie circulaire - Google Patents

Scie murale avec guide pour protège-lame de scie circulaire 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)
English (en)
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EP3827952A1 (fr
Inventor
Wolfgang Winkler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eurodima & Co KG GmbH
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Eurodima & Co KG GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to EP19212507.8A priority Critical patent/EP3827952B1/fr
Publication of EP3827952A1 publication Critical patent/EP3827952A1/fr
Application granted granted Critical
Publication of EP3827952B1 publication Critical patent/EP3827952B1/fr
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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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Claims (14)

  1. Scie murale comprenant une unité de scie (13) avec un bras pivotant (4) et une lame de scie pouvant être montée sur le bras pivotant, un support de protège-lame (6) et un guide de protection, caractérisée en ce que le guide de protection comprend
    • une première partie de bras (1) fixée à l'unité de scie (13),
    • une deuxième partie de bras pivotante (2) articulée sur l'extrémité libre de la première partie de bras (1)
    • et une troisième partie de bras pivotante (3) articulée sur la deuxième partie de bras (2),
    à l'extrémité libre de la troisième partie de bras pivotante (3) étant attaché le support de protège-lame (6) sur lequel un protège-lame peut être monté.
  2. Scie murale selon la revendication 1, caractérisée en ce que la deuxième partie de bras (2) et le bras pivotant (4) sont orientés parallèlement et montés de manière à pouvoir pivoter de façon synchrone autour de l'axe longitudinal de la première partie de bras (1).
  3. Scie murale selon la revendication 2, caractérisée en ce que la troisième partie de bras (3) est montée dans le sens opposé à la deuxième partie de bras (2) de manière à pouvoir pivoter de façon synchrone autour de l'axe longitudinal de la première partie de bras (1),
    l'axe longitudinal de la troisième partie de bras (3) étant orienté parallèlement à l'axe longitudinal de la première partie de bras (1) exactement au moment où les axes longitudinaux de la deuxième partie de bras (2) et du bras pivotant (4) sont aussi orientés parallèlement à l'axe longitudinal de la première partie de bras (1).
  4. Scie murale selon une des revendications 1 à 3, caractérisée en ce que l'orientation du support de protège-lame (6) reste inchangée lors de la rotation de la troisième partie de bras (3), l'écart du support de protège-lame (6) par rapport à l'unité de scie (13) restant également inchangé lors de la rotation de la troisième partie de bras (3).
  5. Scie murale selon une des revendications 1 à 4, caractérisée par un protège-lame, l'espace intérieur creux du protège-lame étant adapté à la taille de la lame de scie, des lames de scie dotées d'un diamètre de lame de 800 mm maximum pouvant de préférence être entièrement insérées dans le protège-lame.
  6. Scie murale selon une des revendications 1 à 5, caractérisée par une transmission par engrenage dans le guide de protection.
  7. Scie murale selon la revendication 6, dans laquelle au moins deux roues dentées disposées l'une au-dessus de l'autre et en prise l'une avec l'autre sont installées respectivement dans la première partie de bras (1), dans la deuxième partie de bras (2) et dans la troisième partie de bras (3) et
    dans laquelle une roue dentée d'entraînement principale (14) et au moins une roue dentée d'entraînement auxiliaire (14') sont installées dans l'unité de scie (13),
    la roue dentée d'entraînement principale (14) et l'au moins une roue dentée d'entraînement auxiliaire (14') étant en prise l'une avec l'autre.
  8. Scie murale selon la revendication 7, caractérisée par un arbre d'entraînement principal qui relie entre eux solidairement en rotation le bras pivotant (4) et la roue dentée d'entraînement principale (14).
  9. Scie murale selon une des revendications 7 et 8, caractérisée par un premier arbre d'entraînement qui relie entre elles solidairement en rotation la roue dentée d'entraînement de la première partie de bras (7) et la roue dentée d'entraînement auxiliaire (14'),
    la roue dentée d'entraînement auxiliaire (14') étant disposée de façon coaxiale au-dessus de la roue dentée d'entraînement de la première partie de bras (7).
  10. Scie murale selon une des revendications 7 à 9, caractérisée par un deuxième arbre d'entraînement qui relie entre elles la première partie de bras (1) et la deuxième partie de bras (2),
    la roue dentée terminale de la première partie de bras (8) et la deuxième partie de bras (2) étant reliées solidairement en rotation avec le deuxième arbre d'entraînement.
  11. Scie murale selon une des revendications 7 à 10, caractérisée par une transmission par engrenage à deux étages dans la deuxième partie de bras (2) comprenant au moins trois roues dentées en prise l'une avec l'autre dans chacun des premier et deuxième étages de transmission,
    la première roue dentée du premier étage de transmission (9) et la première roue dentée du deuxième étage de transmission (9') étant libres en rotation et disposées de façon coaxiale au-dessus de la roue dentée terminale de la première partie de bras (8),
    la roue dentée terminale du premier étage de transmission (10) étant reliée solidairement en rotation avec la troisième partie de bras (3),
    la première roue dentée du premier étage de transmission (9) étant deux fois plus grande que la roue dentée terminale du premier étage de transmission (10) et
    la première roue dentée du deuxième étage de transmission (9') étant de la même taille que la roue dentée terminale du deuxième étage de transmission (10').
  12. Scie murale selon la revendication 11, caractérisée par un arbre fixe qui relie entre elles la roue dentée terminale du deuxième étage de transmission (10') et la première roue dentée de la troisième partie de bras (11) libres en rotation et disposées de façon coaxiale l'une au-dessus de l'autre,
    la roue dentée terminale du premier étage de transmission (10) étant disposée entre la roue dentée terminale du deuxième étage de transmission (10') et la première roue dentée du troisième bras (11).
  13. Scie murale selon la revendication 12, caractérisée par au moins trois roues dentées en prise l'une avec l'autre dans la troisième partie de bras (3),
    la première roue dentée de la troisième partie de bras (11) étant de la même taille que la roue dentée terminale de la troisième partie de bras (12).
  14. Scie murale selon une des revendications 7 à 11, caractérisée en ce que le support de protège-lame (6) est relié solidairement en rotation avec la roue dentée terminale de la troisième partie de bras (12).
EP19212507.8A 2019-11-29 2019-11-29 Scie murale avec guide pour protège-lame de scie circulaire Active EP3827952B1 (fr)

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EP19212507.8A EP3827952B1 (fr) 2019-11-29 2019-11-29 Scie murale avec guide pour protège-lame de scie circulaire

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Application Number Priority Date Filing Date Title
EP19212507.8A EP3827952B1 (fr) 2019-11-29 2019-11-29 Scie murale avec guide pour protège-lame de scie circulaire

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EP3827952A1 EP3827952A1 (fr) 2021-06-02
EP3827952B1 true EP3827952B1 (fr) 2022-08-17

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Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933145A1 (de) 1999-07-20 2001-01-25 Hilti Ag Sägevorrichtung
DE102009026638A1 (de) 2009-06-02 2010-12-16 Hilti Aktiengesellschaft Vorrichtung zum Verstellen eines Blattschutzhalters einer Wandsäge

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