EP2258527B1 - Scie murale avec dispositif de réglage d'un support de protection de lame - Google Patents

Scie murale avec dispositif de réglage d'un support de protection de lame Download PDF

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Publication number
EP2258527B1
EP2258527B1 EP20100163764 EP10163764A EP2258527B1 EP 2258527 B1 EP2258527 B1 EP 2258527B1 EP 20100163764 EP20100163764 EP 20100163764 EP 10163764 A EP10163764 A EP 10163764A EP 2258527 B1 EP2258527 B1 EP 2258527B1
Authority
EP
European Patent Office
Prior art keywords
saw
blade
coupling element
toggle lever
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.)
Active
Application number
EP20100163764
Other languages
German (de)
English (en)
Other versions
EP2258527A2 (fr
EP2258527A3 (fr
Inventor
Bruno Werder
Josef Schittl
Walter Nessler
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.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP2258527A2 publication Critical patent/EP2258527A2/fr
Publication of EP2258527A3 publication Critical patent/EP2258527A3/fr
Application granted granted Critical
Publication of EP2258527B1 publication Critical patent/EP2258527B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/95—Machine frame
    • Y10T83/96—Guard

Definitions

  • the present invention relates to a wall saw with a device for adjusting a arranged on a saw arm of the wall saw blade protection holder according to the preamble of claim 1.
  • a wall saw goes for example from the US 207/163412 A1 out.
  • Wall saws are sawing machines for cutting through reinforced or non-reinforced walls, ceilings and floors made of concrete or similar substrates by means of rotating saw blades equipped with cutting segments. They are used in civil engineering, renovations and renovations. For example, it may be necessary in demolition or remodeling work to cut existing concrete walls to remove or cut out areas of the concrete walls.
  • Known wall saws have a saw blade guard to protect the operator, surrounding the saw blade and preventing contact.
  • the saw blade guard is mounted on the saw arm via a blade guard.
  • the blade guard is frictionally fixed via a mounting screw, the mounting screw can only be actuated with disassembled saw blade and blade guard. An adjustment of the blade guard relative to the saw arm is therefore only possible if the saw blade and the blade guard are dismantled.
  • US 2007/163412 A1 discloses a wall saw having a saw arm, a blade guard and a device for adjusting the blade guard with a coupling element.
  • the coupling element is connected to the blade guard at a first end and to the saw arm at a second end.
  • the disadvantage is that the blade protection holder is not fixed during processing with the wall saw and can be accidentally adjusted.
  • the object of the present invention is in contrast to simplify the adjustment of the blade protection holder relative to the saw arm.
  • the adjustment of the blade guard should be possible in particular when mounted saw blade and blade guard.
  • a coupling element which is designed as a toggle lever with a first section, a second section and a third section.
  • the coupling element is connected to the blade guard at a first end and to the saw arm at a second end in a locked state.
  • the coupling element is accessible and the blade protection holder can be adjusted with mounted saw blade and blade guard.
  • the toggle lever is preferably designed as a half toggle lever system. In a half toggle lever system, a lever arm is articulated at a fixed point.
  • the first portion of the toggle lever preferably has a stop element which cooperates in the locked state with a stop pin provided on the second portion of the toggle lever.
  • the stop element and the stop pin are arranged so that the toggle exceeds the dead center by a certain amount, when the stop element abuts the stop pin. Exceeding the dead center position accidental release of the blade guard is excluded.
  • the third portion of the toggle lever is designed as a pin, which is positively connected in the locked state with a bore in a gear of the saw arm.
  • the gear has a plurality of holes corresponding to certain positions of the blade guard relative to the saw arm.
  • the third portion of the toggle lever in the locked state cooperate with a spline.
  • the coupling element is preferably converted by means of a control element from a locked state into an unlocked state.
  • the operating element can, for example, be designed as a hexagon, which is actuated by means of an open-end wrench. Alternatively, the operating element may be designed as a lever which is manually actuated by the operator.
  • the coupling element preferably has an adjusting device for adjusting the clearance between the coupling element and the saw arm.
  • the coupling element is preferably arranged in the locked state so that the dead center position of the coupling element is exceeded. Exceeding the dead center position accidental release of the blade guard is excluded.
  • the blade protector preferably has a guide sleeve.
  • the guide sleeve allows a controlled movement of the toggle lever during locking and unlocking and serves to support the forces occurring.
  • wall saw 1 comprises a saw head 2, a saw arm 3 with a saw blade 4 and a saw blade 6, an operating device 6 and a fastening device 7 for fixing the wall saw 1.
  • the operation of the wall saw 1 via the operating device 6, via a supply line. 8 is connected to the saw head 2.
  • the wall saw 1 is fastened to the base 11 with the fastening device 7 consisting of a guide rail 9 and rail feet 10a, 10b .
  • the saw head 2 is arranged longitudinally displaceable on the guide rail 9 in the direction of an axis 13 via a guide carriage 12 .
  • the saw head 2 comprises a first drive device 14 for rotation of the saw blade 4 about an axis of rotation 15 and a second drive means 16 for feed control of the guide carriage 12 along the guide rail 9 in the direction of the axis 13.
  • the first drive means 14 drives a drive shaft whose rotational movement by means arranged in a saw arm 3 gear on a Output shaft is transmitted (see Fig. 2 ), the saw blade 4 um the rotation axis 15 drives.
  • the drive means for rotation of the saw blade 4 and for feed control of the guide carriage 12 may be formed as a common drive means.
  • the saw arm 3 is pivotable about a pivot axis 18 .
  • Fig. 2 shows the sheet protection holder 17 of Fig. 1 the wall saw according to the invention with a device 20 for adjusting the blade protection holder 17 in a saw blade 4 facing away from the rear view of the blade protection holder 17th
  • the saw blade 4 is driven by means of the drive device 14 about the axis of rotation 15.
  • the rotational movement of the drive device 14 is transmitted via a gear in the form of a gear 21 to an output shaft 22 .
  • the gear 21 is part of the saw arm 3.
  • the output shaft 22 is rotatable about the rotation axis 15.
  • the adjustment of the blade protection holder 17 on the saw arm 3 takes place with the aid of the adjusting device 20.
  • the adjusting device 20 comprises a knee lever designed as a coupling element 25 which is mounted at a first end on the blade protection holder 17 in a fixed point and at a second end with a first bore 26 in the gear 21 is engaged.
  • FIGS. 3a , b show a section of the blade protection holder 17 of Fig. 2 with the adjusting device 20 in a saw blade 4 facing the front view of the blade protection holder 17. It show Fig. 3a the locked state and Fig. 3b the unlocked state of the adjusting device 20 for the blade protection holder 17th
  • the coupling element 25 is designed as a toggle lever with a first section 30, a second section 31 and a third section 32 .
  • the first and second sections 30, 31 of the toggle lever 25 are adjustably coupled via a first hinge 33 and the second and third sections 31, 32 via a second hinge 34 .
  • the first portion 30 of the toggle lever 25 is positively connected in the locked state by means of a control element 35 with the blade protector 17.
  • the control element 35 is formed as a hexagon, which is actuated via a fork wrench.
  • the control element 35 may be formed as a lever which is manually operated by the operator.
  • the third portion 32 of the toggle lever 25 is in the form of a bolt and engages in the first bore 26, which is arranged in a radial surface 36 of the gear 21, a.
  • the gear 21 has in the radial surface 36 next to the first bore 26 has a second and third bore 37, 38 , into which the bolt 32 of the toggle lever 25 can engage.
  • the bolt 32 is in the execution of Fig. 3a in engagement with the first bore 26, which corresponds to a 0 ° position of the blade protection holder 17.
  • the second and third bores 37, 38 correspond to, for example, a + 45 ° position and a - 45 ° position of the blade protection holder 17 relative to the saw arm 3.
  • In the radial surface 36 of the gear 21 further holes may be provided, the defined positions of the blade guard 17 relative to the saw arm 3 correspond.
  • the toggle lever 25 is unlocked.
  • the operating element 35 is moved in the direction of the arrow 39 about the rotation axis 40, which runs perpendicular to the plane of the drawing.
  • the toggle lever 25 is released and the first portion 30 of the toggle lever 25 moves in the in Fig. 3b shown position.
  • the knee joint buckles and pulls the bolt 32 out of the first bore 26 of the gear 21.
  • the blade protection holder 17 is pivotable about the axis of rotation 15 and can now be pivoted to the desired position. Once the bolt 32 of the bell crank 25 is in the desired position, the toggle lever 25 is closed by turning the control element 35 in the direction of the arrow 41 and the bolt 32 is in engagement with the bore in the gear 21st
  • the first portion 30 of the toggle lever 25 has at a second portion 31 facing the end of a stop element 42 in the form of a stop finger.
  • the stop finger 42 cooperates with a stop pin 43 of the second portion 31.
  • the stop finger 42 abuts on the stop pin 43 and further rotation of the first portion 30 in the direction 41 is blocked by the stop pin 43.
  • the stop element 42 and the stop pin 43 are arranged so that the toggle lever 25 has exceeded the dead center position by a certain amount when the stopper member 42 abuts against the stop pin 43.
  • Exceeding the dead center position accidental release of the blade protection holder 17 is excluded by an insufficient fixing a fixing screw in the adjustment 20.
  • Exceeding the dead center is referred to as self-locking or latching.
  • the self-locking in the locked state prevents opening of the toggle lever 25 by the machining forces.
  • the blade protection holder 17 has a guide sleeve 44 , which guides the bolt 32 of the toggle lever 25.
  • the guide sleeve 44 allows a controlled movement of the bolt 32 during the locking and unlocking of the toggle lever 25 and serves to support the occurring Forces.
  • the bolt 32 has a sealing element 45 .
  • the toggle lever 25 has an adjusting device 46 for adjusting the clearance between the bolt 32 and the bore in the form of an eccentric. With the help of the adjusting device 46, the play or the bias of the toggle lever 25 is adjusted so that the bolt 32 is positively arranged in the locked state in the bore 26, 37, 38 and in the unlocked state from the bore 26, 37, 38 slides out so that the sheet protection holder 17 can be moved to the desired position.
  • FIGS. 3a, b illustrated embodiment of the blade guard holder 17 is positively connected via the bolt 32 which engages in a bore 26, 37, 28 in the gear 21, connected to the saw arm 3.
  • the radial surface 36 of the gear 21 may be provided with a toothing, in which the third portion 32 of the bell crank 25 engages.

Landscapes

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

Claims (8)

  1. Scie murale (1) comportant :
    un bras de scie (3),
    un support de protection de lame (17) qui est agencé sur le bras de scie (3), et
    un dispositif (20) de réglage du support de protection de lame (17) comportant un élément de couplage (25) dont une première extrémité est reliée au support de protection de lame (17) et dont une seconde extrémité est, dans un état verrouillé, reliée au bras de scie (3),
    caractérisée en ce que l'élément de couplage est configuré sous la forme d'un levier à genouillère (25) ayant une première partie (30), une deuxième partie (31) et une troisième partie (32).
  2. Scie murale selon la revendication 1, caractérisée en ce que la première partie (30) du levier à genouillère (25) comporte un élément de butée (42) qui, à l'état verrouillé, coopère avec un premier axe de butée (43) prévu sur la deuxième partie (31) du levier à genouillère (25).
  3. Scie murale selon la revendication 2, caractérisée en ce que la troisième partie du levier à genouillère (25) est configurée sous la forme d'un axe qui, à l'état verrouillé, est relié par complémentarité de formes à un alésage (26, 37, 38) dans une roue dentée (21) du bras de scie (3).
  4. Scie murale selon la revendication 3, caractérisée en ce que la roue dentée (21) comporte plusieurs alésages (26, 37, 38) qui correspondent à des positions déterminées du support de protection de lame (17) par rapport au bras de scie (3).
  5. Scie murale selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de couplage (25) peut être transféré au moyen d'un organe de commande (35) d'un état verrouillé à un état déverrouillé.
  6. Scie murale selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de couplage (25) comporte un dispositif de réglage (46) pour régler le jeu entre l'élément de couplage (25) et le bras de scie (3).
  7. Scie murale selon l'une quelconque des revendications précédentes, caractérisée en ce que l'élément de couplage (25) à l'état verrouillé est agencé de telle sorte que la position au point mort de l'élément de couplage (25) est franchie.
  8. Scie murale selon l'une quelconque des revendications précédentes, caractérisée en ce que le support de protection de lame (17) comporte un manchon de guidage (44).
EP20100163764 2009-06-02 2010-05-25 Scie murale avec dispositif de réglage d'un support de protection de lame Active EP2258527B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910026638 DE102009026638A1 (de) 2009-06-02 2009-06-02 Vorrichtung zum Verstellen eines Blattschutzhalters einer Wandsäge

Publications (3)

Publication Number Publication Date
EP2258527A2 EP2258527A2 (fr) 2010-12-08
EP2258527A3 EP2258527A3 (fr) 2011-08-17
EP2258527B1 true EP2258527B1 (fr) 2012-08-22

Family

ID=42668103

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100163764 Active EP2258527B1 (fr) 2009-06-02 2010-05-25 Scie murale avec dispositif de réglage d'un support de protection de lame

Country Status (3)

Country Link
US (1) US8833357B2 (fr)
EP (1) EP2258527B1 (fr)
DE (1) DE102009026638A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3827952A1 (fr) 2019-11-29 2021-06-02 EURODIMA GmbH & Co KG Scie murale avec guide pour protège-lame de scie circulaire

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9168596B2 (en) * 2010-09-01 2015-10-27 Husqvarna Ab Blade guard for a saw
EP2993013A1 (fr) * 2014-09-08 2016-03-09 Hilti Aktiengesellschaft Procédé de commande d'un système de scie murale par sciage en long
EP2993014A1 (fr) * 2014-09-08 2016-03-09 HILTI Aktiengesellschaft Procédé de commande d'un système de scie murale par sciage en long
EP2993009A1 (fr) * 2014-09-08 2016-03-09 HILTI Aktiengesellschaft Procédé de commande d'un système de scie murale par sciage en long

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3827952A1 (fr) 2019-11-29 2021-06-02 EURODIMA GmbH & Co KG Scie murale avec guide pour protège-lame de scie circulaire

Also Published As

Publication number Publication date
DE102009026638A1 (de) 2010-12-16
EP2258527A2 (fr) 2010-12-08
EP2258527A3 (fr) 2011-08-17
US20110203564A1 (en) 2011-08-25
US8833357B2 (en) 2014-09-16

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