EP3827952A1 - 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
EP3827952A1
EP3827952A1 EP19212507.8A EP19212507A EP3827952A1 EP 3827952 A1 EP3827952 A1 EP 3827952A1 EP 19212507 A EP19212507 A EP 19212507A EP 3827952 A1 EP3827952 A1 EP 3827952A1
Authority
EP
European Patent Office
Prior art keywords
arm
gear
partial
sub
blade guard
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.)
Granted
Application number
EP19212507.8A
Other languages
German (de)
English (en)
Other versions
EP3827952B1 (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
Original Assignee
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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Publication date
Application filed by Eurodima & Co KG GmbH filed Critical Eurodima & Co KG GmbH
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 enable 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 enables the saw blade to dip into the wall.
  • the blade guard holder With an associated blade guard on the base body of the wall saw.
  • the blade guard holder always extends parallel to the immersion direction of the saw blade, regardless of the orientation of the swivel arm, and at least partially surrounds it.
  • the operator is protected on the one hand from direct contact with the saw blade and on the other hand also from indirect contact with parts of the saw blade that have broken off during the sawing, for example.
  • EP 1 072 355 A2 a wall saw with blade protection holder is disclosed in which the immersion depth of the saw blade is indicated on the blade protection holder with the aid of markings. Furthermore, in EP 2 258 527 B1 discloses a wall saw with a device for adjusting a blade protection holder mounted on the saw arm of the wall saw.
  • the blade guard is mounted with a linear guide attached to the base body and is driven via guide strips. This tour is very dependent on the subsurface. This means that if there are grooves or unevenness in the concrete, the blade protection can no longer be used continuously move the saw flush with the wall. As a result, gaps open up again and again between the wall and the blade guard, through which broken parts and dirt can fly outwards.
  • known blade protection devices also move along the wall with the wall saw with the aid of guide rollers, which are mounted on the open end of the blade protection, as soon as the saw blade is immersed as far as possible in the wall. If these small guide rollers get dirty due to the concrete sawing work and thereby jam, the blade guard can no longer slide along the wall. In addition, difficulties arise with existing corner bores, 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 a synchronous movement of the blade guard with the saw blade when immersing or pulling it out of the wall or the like, without requiring a vertical displacement of the blade guard, which is therefore independent of the prevailing ground moves evenly.
  • the protective guide should be able to be mounted or dismantled in a very simple manner on the base body of the wall saw 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 partial arm, since the first partial arm is fixedly connected to the saw unit and is the only one is a 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 part arm and the swivel arm are aligned in parallel and rotatably mounted synchronously about the longitudinal axis of the first part arm. That is, the second part arm rotates simultaneously with the swivel arm in the same direction, the second part arm and the swivel arm or their longitudinal axes being constantly parallel to one another.
  • the third part arm is rotatably mounted synchronously in the opposite direction with the second part arm about the longitudinal axis of the first part arm.
  • the longitudinal axis of the third partial arm is precisely 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.
  • Another embodiment of the wall saw according to the invention is given by the constant alignment of the blade protection holder mounted on the free end of the third partial arm.
  • the alignment of the blade protection holder remains unchanged even when the third partial arm is rotated, in that the blade protection holder rotates synchronously and in the opposite direction to the third partial arm. Therefore, the blade protection holder cannot be connected to the entire third sub-arm in a rotationally fixed manner.
  • the rotational movement of the blade guard holder is therefore automatically translated into a 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 is dipped into the wall.
  • the size ratios of the first, second and third partial arms are precisely selected so that, with synchronous rotation of all partial arms, the distance between the blade guard holder and the Saw unit remains essentially 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 thus 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 enable 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, provided the blade diameter is less than or equal to 800 mm.
  • intermeshing gearwheels arranged one above the other in the first partial arm, at least three intermeshing gearwheels in the second partial arm and at least three intermeshing gearwheels in the third partial arm. Since the direction of rotation of rotatably mounted, successive gearwheels is constantly changing, it is particularly important whether there is an even or odd number of rotatable gearwheels in the sub-arms.
  • the first part arm and the swivel arm rotate in the same direction, there are also an even number of gears in the first part arm, since the main drive gear is built into the saw unit and not in the first part arm. More precisely, there is a main drive gear in the saw unit, which is arranged coaxially under the swivel arm. Furthermore, there is at least one auxiliary drive gear, which meshes with the main drive gear, above the main drive gear in the saw unit.
  • 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 partial arm with the aid 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 part arm and the second part arm to one another, the terminal gear in the first part arm and the second part arm being connected to the second drive shaft in a rotationally fixed manner. That means the second part arm rotates rectified and synchronized with the terminal gear in the first partial arm, which is driven by the main drive gear.
  • the second partial arm preferably comprises a two-stage gear transmission with at least three intermeshing gear wheels in the first and second transmission stages.
  • the first gear of the first gear stage and the first gear of the second gear stage are arranged in a non-rotating manner and coaxially above the terminal gear in the first partial arm. That means these two gears don't turn.
  • the terminal gear of the first gear stage is rotatably connected to the third sub-arm, the first gear of the first gear stage being twice as large as the terminal gear of the first gear stage, the first gear of the second gear stage being the same size as the terminal gear of the second gear stage .
  • the third sub-arm which is driven by the first gear of the first gear stage, rotates in the opposite direction to the second sub-arm.
  • a stationary shaft additionally connects the terminal gear of the second gear stage with the first gear in the third partial arm in a rotationally free and coaxial manner one above the other.
  • the terminal gear of the first gear stage is arranged between the terminal gear of the second gear stage and the first gear in the third sub-arm, but is not connected to the stationary shaft. That is, the terminal gear of the second gear stage and the first gear in the third sub-arm do not rotate or only rotate with the second sub-arm, since the stationary shaft is connected to it.
  • the blade guard holder is rotatably connected to the end gear in the third part arm, the end gear in the third part arm is rotatably mounted in the third part arm.
  • the blade guard holder rotates in the same direction and synchronously with the end gear in the third sub-arm.
  • the blade guard holder must rotate in the opposite direction to and half as fast as the third sub-arm in order to compensate for its rotation and to keep the alignment of an assembled blade guard constant.
  • an odd number of gears preferably three gears, are also installed in the third sub-arm, since the first gear 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 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, result in the desired translation. More precisely, 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 the blade guard to constantly surround the entire part of the saw blade that is not immersed in the wall when the saw blade is mounted and to automatically move with the saw blade and, due to the size relationships of the partial arms of the protective guide, always along the wall .
  • 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 linked to the insertion and removal of the saw blade from a wall via the protective guide.
  • the main 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 area can only be changed by changing the position of the guide rails, more precisely by removing and rebuilding 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.
  • Fig. 1 only the protective guide is shown, which comprises a first partial arm 1 fixed to the saw unit 13, a second rotatable partial arm 2 hinged to the free end of the first partial arm 1 and a third rotatable partial arm 3 hinged to the second partial arm 2.
  • a blade guard holder 6 is attached to which the blade guard (not shown for reasons of clarity) can be mounted.
  • FIGS. 2 and 3 additionally show the swivel arm 4, which is fixed in an articulated manner on the base body of the wall saw and on which the saw blade can be mounted.
  • the second part arm 2 and the swivel arm 4 are in the basic position of the wall saw as in Fig. 2 can be seen aligned parallel and rotatably mounted synchronously about the longitudinal axis of the first partial arm 1.
  • the third sub-arm 3 is rotatably mounted in the opposite direction with the second sub-arm 2 synchronously about the longitudinal axis of the first sub-arm 1 and is also aligned parallel to the second sub-arm 2 and the pivot arm 4 in the basic position.
  • the illustrated basic position of the wall saw is that orientation of the swivel arm 4 and the protective guide which these have when the base body is attached to the guide rail. At the same time, this is the only position in which the saw blade does not plunge 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 accordingly aligned parallel to the longitudinal axis of the first partial arm 1 and the longitudinal axes of the second partial arm 2 and the pivot arm 4 are aligned 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.
  • first sub-arm 1 in Fig. 1 Six superposed, meshing gears built in, the bottom gear in the first part arm 1 being the drive gear in the first part arm 7 and the top gear in the first part arm 1 being the terminal gear in the first part arm 8. All gears in the first partial arm 1 serve to drive the second partial arm 2, which is connected to the terminal gear in the first partial arm 8 in a rotationally fixed manner 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 Fig. 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 is coaxial with the drive gear in the first partial arm 7 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 partial arm 2 via the transmission in the first partial arm 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 intermeshing gears.
  • the first gear of the second gear stage 9 'and the first gear of the first gear stage 9 are located as in FIG Fig. 3 shown coaxially above the terminal gear in the first sub-arm 8.
  • the first gear of the first gear stage 9 and the first gear of the second gear stage 9 ' are non-rotatably connected to the second sub-arm 2. This means that 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 part arm 2 is now used to drive the third part arm 3, while the second gear stage in the second part arm 2 is directly connected to the gear transmission in the third part arm 3 and is therefore responsible for the vertical alignment of the blade guard holder 6.
  • Fig. 2 shows the terminal gear of the first gear stage 10 rotatably connected to the third sub-arm 3.
  • Fig. 3 shows the terminal gear of the second gear stage 10 ′, which is connected to the first gear in the third partial arm 11 by a stationary shaft. At least one rotating gear is located between the terminal gear of the first gear stage 10 and the terminal gear of the second gear stage 10 ', which are both rotatably mounted in the second partial arm 2. Due to the arrangement of the gears in the first gear stage of the second sub-arm 2, the third sub-arm 3 rotates in the opposite direction to the second sub-arm 2.
  • the proportions of the gears of the two-stage gear transmission in the second partial arm 2 are selected as follows:
  • the first gear of the first gear stage 9 is twice as large as that Terminal gear of the first gear stage 10.
  • the first gear of the second gear stage 9 ' is the same size as the terminal gear of the second gear stage 10'.
  • the first gear in the third sub-arm 11 is connected to the terminal gear of the second gear stage 10 'via a stationary shaft.
  • the resting shaft is connected to the second partial arm 2. That is, the first gear in the third sub-arm 11 is in turn free of rotation in the third sub-arm 3 and does not rotate with it.
  • the end gear of the second gear stage 10 'arranged coaxially one above the other in the third sub-arm 3 is the end gear of the first gear stage 10, which is non-rotatably connected to the third sub-arm 3 and drives it.
  • the terminal gear in the third partial arm 12 is non-rotatably connected to the blade guard holder 6 and drives it. Due to the arrangement of the gears in the third sub-arm 3 and the arrangement of the second gear stage in the second sub-arm 2, the blade guard holder 6 rotates in the same direction as the second sub-arm 2 and opposite to the third sub-arm 3 , 9 'to the respective terminal gears of the first and second gear stages 10, 10' 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 is rotated. 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.
  • the protective guide according to the invention allows a blade guard to be used without guide rollers, as a result of which 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)
EP19212507.8A 2019-11-29 2019-11-29 Scie murale avec guide pour protège-lame de scie circulaire Active EP3827952B1 (fr)

Priority Applications (1)

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

Applications Claiming Priority (1)

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

Publications (2)

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

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1072355A2 (fr) 1999-07-20 2001-01-31 HILTI Aktiengesellschaft Dispositif de sciage
EP2258527B1 (fr) 2009-06-02 2012-08-22 HILTI Aktiengesellschaft Scie murale avec dispositif de réglage d'un support de protection de lame

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1072355A2 (fr) 1999-07-20 2001-01-31 HILTI Aktiengesellschaft Dispositif de sciage
EP2258527B1 (fr) 2009-06-02 2012-08-22 HILTI Aktiengesellschaft Scie murale avec dispositif de réglage d'un support de protection de lame

Also Published As

Publication number Publication date
EP3827952B1 (fr) 2022-08-17

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