EP1961531B1 - Dispositif de serrage à bras de manoeuvre escamotable et appareil comportant un tel dispositif - Google Patents

Dispositif de serrage à bras de manoeuvre escamotable et appareil comportant un tel dispositif Download PDF

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Publication number
EP1961531B1
EP1961531B1 EP08358003.5A EP08358003A EP1961531B1 EP 1961531 B1 EP1961531 B1 EP 1961531B1 EP 08358003 A EP08358003 A EP 08358003A EP 1961531 B1 EP1961531 B1 EP 1961531B1
Authority
EP
European Patent Office
Prior art keywords
tightening
wrench
tightening member
nut
key
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
EP08358003.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1961531A1 (fr
Inventor
Roger Pellenc
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.)
Pellenc SAS
Original Assignee
Pellenc SAS
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 Pellenc SAS filed Critical Pellenc SAS
Publication of EP1961531A1 publication Critical patent/EP1961531A1/fr
Application granted granted Critical
Publication of EP1961531B1 publication Critical patent/EP1961531B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/02—Spanners; Wrenches with rigid jaws
    • B25B13/08—Spanners; Wrenches with rigid jaws of open jaw type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B13/00—Spanners; Wrenches
    • B25B13/48—Spanners; Wrenches for special purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/14—Arrangements for stretching the chain saw

Definitions

  • the present invention relates to a clamping device according to the preamble of claim 1. It also relates to devices provided with this clamping device, for example portable tools and, in particular portable chain saws.
  • Such a clamping device is known from the document DE-29909645U1 .
  • a screw-nut device generally equips the portable chain saws to perform the clamping and immobilization, in the desirable position, of the guide bar, to allow adjustment of the tension of the latter or the establishment of a new chain.
  • the head of the nut is provided with two radial notches, while the key is provided with a tooth which, according to the tilting position of said key, can mesh with one of said notches to allow the rotating the nut in one direction or the other, or being free of said notches to allow free rotation of the wrench around the nut.
  • This device requires, prior to the movements of rotation of the nut or placement of the key in the storage position, a clutch maneuver or release required, as appropriate, which may not be immediately understood by users.
  • the aim of the invention is at least to propose a solution to the problems arising from the various constraints described above.
  • this object is achieved by means of a clamping device of the screw-nut type, comprising a clamping member adapted to be rotated and a drive key of this clamping member provided with a maneuvering arm.
  • this key and the clamping member being united by a connecting device arranged so that the key can tilt relative to the clamping member about a tilting axis perpendicular to the screw axis of said clamping member , so as to allow its placement in the rest position substantially perpendicular to said screw axis, and can cause the clamping member to rotate about the screw axis in the direction of tightening or loosening, or to rotate freely relative to the clamping member, around said screwing axis, over an angular displacement range of at least 170 °, after immobilization of said clamping member, at the end of the clamping maneuver, this device being remarkable in that the himself rrage and the drive key of the connecting device are provided, respectively, means coming into contact with each other, during the rotation of the key, on the one hand, in
  • the operation of the clamping device does not require the use of any external tool to tighten or loosen the clamping member (screw or nut) of said device.
  • the key connected to the clamping member allows the drive in rotation of the latter, while being able to be placed in a determined rest position without modifying the clamping obtained, for example in a position folded against the housing of the apparatus for do not interfere with the use of it.
  • this maneuver is very simple and fast.
  • the rotary clamping member of the screw-nut system connected to the operating key is constituted by the nut of said system.
  • the curved end of the second branch of the drive fork is dimensioned so as not to come into contact with the driving abutment of the clamping member, during the pivoting of the wrench around of the screw axis, relative to the clamping member.
  • Another advantageous feature of the clamping device may be that said connecting device provides an unmountable connection between the key and the clamping member.
  • the unmountable connection between the key and the clamping member is obtained by plastic deformation of said branches towards each other, so as to engage these branches in the holes of the cap.
  • said connecting device provides a removable connection between the key and the clamping member, at least in the absence of clamping by this clamping member.
  • the clamping member comprises a notch for lateral access to said annular groove, for the passage of one of said branches towards this annular groove, one of said holes of the hat having the shape of a slot having an open end for the passage of one of said branches.
  • the key comprises an operating arm provided with an extension with which this operating arm forms a telescopic handle of adjustable length, said extension being movable along the operating arm between a retracted position and a handle extension position telescopic.
  • At least a portion of the operating arm is made of a magnetic material.
  • the invention also relates to an apparatus, characterized in that it comprises a clamping device as defined above.
  • this apparatus is constituted by a chain saw which comprises an endless cutting chain and a chain guide.
  • a locking device of this guide comprises said clamping device.
  • the apparatus comprises a storage area of the handle of the clamping device, in a predetermined angular position, around the screw axis.
  • the apparatus comprises a sleeve retaining magnet in a stowed position at said storage area.
  • the claimed clamping device can also be applied to other tools or machines in which frequent adjustments of tightening must be carried out, in particular for devices that can be used outdoors.
  • a portable chain saw 1 which comprises a partially illustrated endless cutting chain 2 and a chain guide 3 holding and supporting this chain 2.
  • a clamping device 4 generally designated by reference 4 to FIG. figure 1 clamps this bar 3 and a protective casing 5 between a jaw 5A and an assembly body 6.
  • the clamping device 4 which comprises a nut 7 to be screwed onto a threaded rod 8, for example constituted by the threaded rod of a screw.
  • This clamping device also comprises an operating key 11 and a connecting device generally designated by the reference 9 for joining the nut 7 to said operating key 11.
  • the nut 7 is pierced with a tapped hole 13 of axis X-X ', which is the axis of screwing of this nut 7, that is to say the axis around which the nut 7 turns when his face and his unscrewing.
  • the nut 7 is provided with an annular and lateral groove 14, at its peripheral surface 15.
  • This peripheral surface 15 is cylindrical and has a circular section centered on the axis X-X '.
  • the nut 7 is provided with a pin 16 which passes through the lateral groove 14 from one side to the other.
  • the nut 7 is capped with a rotatable wrapping tubular cap 10 having two diametrically opposed holes 26a, 26b opening into the peripheral groove 14 of said nut.
  • the key 11 is flat and can advantageously be made in a steel blank. It comprises an arm 17 that extends a coupling head 18 to the nut 7.
  • the head 18 has the shape of a fork having two branches 19 and 20 which curve and then move towards one another. One of these branches (branch 19) is longer than the other (branch 20) and its end portion forms a finger 21 abutting against the pin 16, on one side or the other of the ci, depending on the direction of rotation of the key.
  • the cap 10 comprises a cylindrical skirt 24, which closes an end wall 25.
  • Two through holes 26a and 26b for the passage of the branches 19 and 20 are pierced in the skirt 24, opposite each other .
  • One of the holes (hole 26a) can be circular and closed laterally.
  • the second hole (hole 26b) has the shape of a slot whose one end is in the axis of the hole 26a and whose other end, opens into the edge of the cap 10, to the back of it.
  • the end portions of the legs 19 and 20 are coaxial and engaged in the holes 26a and 26b so as to together form a discontinuous tilt shaft of the key 11 on the cap 10.
  • the Y-axis tilting of this key 11 is perpendicular to the axis of screwing X-X ', said axes YY' and XX 'intersecting.
  • the cap 10 is rotatably mounted on the nut 7, so that its axis of rotation coincides with the screw axis X-X '.
  • the branches 19 and 20 penetrate into the peripheral groove 14 and thus hold the key 11 and the cap 10 on the nut 7. In doing so, they have the advantage of filling a second function, their first function mentioned above being form a tilting mounting shaft.
  • the branch 19, via its end 21, also fulfills a function of a rotary drive finger of the nut 7.
  • the accumulation of functions performed by the branches 19 and 20 participates in an advantageous simplification of the clamping device 4 and promotes its compactness.
  • a notch 27 is formed laterally in the rear wall delimiting the groove 14 of the nut 7, this notch opening into said groove.
  • the nut 7 is placed in the cap 10.
  • the branch 19 is inserted in the hole 26a and in the groove 14 of the nut.
  • the other branch is slid towards the bottom of the slot 26b, at the same time as this branch 20 is engaged in the peripheral groove 14, by passing it through the notch 27 ( figure 6 ).
  • This method of assembly makes it possible to form a detachable connection between the key 11 and the nut 7.
  • the nut 7 may be devoid of the notch 27, while the hole 26b may have the same circular shape as the hole 26a. If this is the case, the branches 19 and 20 can be inserted into the holes 26a, the hole 26b and the groove 14 by plastically deforming them towards each other. In this case, an unmountable connection is made between the key and the clamping member.
  • the operating arm of the key has an adjustable length.
  • this maneuvering arm is constituted two telescopically assembled elements, namely an arm 17 provided with the coupling head 18 on which is mounted, with a sliding ability, an extension 12.
  • This extension is a handle that can be performed in any suitable rigid material, for example plastic.
  • the inner arm 17 is provided with a longitudinal slot 22, in which the rod of a bolt 23 passes.
  • the slot 22 has two ends each of which its edge forms one of two abutments 22a and 22b for the bolt rod. 23.
  • This bolt 23 and the stop 22a form complementary means for retaining the handle 12 on the arm 17.
  • branch 20 can cross the location of the pin 16 without clinging to it, as can be seen at figure 3 .
  • the key 11 can freely rotate with respect to the nut 7, over a range of angular displacement referenced ⁇ to the figure 7 .
  • the finger 21 abuts against the pin 16 and thus couples the key 11 to the nut 7 in the direction of a screwing F 1 of the nut 7, which is the case of the finger 21 in full line at the figure 7 .
  • the finger 21 also abuts against an opposite surface of the pin 16 and thus couples the key 11 to the nut 7, but in the direction of unscrewing F 2 of this nut 7, which is the case of the finger 21 of the key 11 in phantom end to the figure 7 .
  • the pin 16 therefore forms a double stop for the finger 21.
  • the range of angular deflection ⁇ extends over more than 340 °, which is advantageous. It can however be less extensive.
  • the angular range or angle of deflection ⁇ is, however, at least 170 °.
  • the handle 12 forms an extension in that it can slide longitudinally on the arm 17.
  • the arm 17 and the handle 12 together form a telescopic handle 28, which is shown in the retracted position at the figure 4 and which is illustrated in extension to the figure 6 .
  • the housing 5 of the tool is provided laterally with a housing 29 for receiving the operating arm 17 of the key or the telescopic handle 28 of the latter in the retracted position.
  • a retaining means keeps the operating arm 17 or the telescopic handle 28 of the key in the retracted position, against the housing 5 of the tool.
  • a magnet for retaining the actuating arm 17 or the handle 28 in the retracted rest position, this magnet being visible and designated by the reference 30 to Figures 8 and 10 .
  • the key 11 is in a position corresponding to the moment when the appropriate clamping force has been obtained. It is then necessary to retract the handle 28 in the housing 29, which is done without difficulty when the angular position of this housing 29 about the axis XX 'is in the range of angular deflection ⁇ , at the end of the tightening of the nut 7. Indeed, the key 11 can rotate freely, the clamping member 7 remaining locked in the immobilization position corresponding to the desired tightening.
  • the angular position of the housing 29 around the axis XX ' is outside the range of angular displacement ⁇ , after the tightening of the nut 7.
  • the storage of the handle 28 then comprises a first step which consists of place this sleeve 28 in the position illustrated in figure 10 , by rotating it about the axis X-X ', after having retracted it.
  • the retracted handle 28 is opposite the housing 29 relative to the axis X-X '. It is then tilted around the axis Y-Y ', in the direction of the arrow F 3 , so as to embed it in the housing 29, after which the handle 28 is as illustrated in FIGS. figures 1 and 12 .
  • the handle 28 of the key is stored in the housing 29, where it is retained by the magnet 30 attracting a magnetic portion of the handle 28, namely its operating arm 17. Other means of retaining the operating arm of the key in the retracted position of rest can be provided.
  • the movable clamping member in rotation may be constituted by a screw, in which case the connecting device 9 which has just been described is located at the head of this screw.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Clamps And Clips (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Sawing (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
EP08358003.5A 2007-02-26 2008-02-25 Dispositif de serrage à bras de manoeuvre escamotable et appareil comportant un tel dispositif Active EP1961531B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0701356A FR2913076B1 (fr) 2007-02-26 2007-02-26 Dispositif de serrage a bras de manoeuvre escamotable et appareils en comportant application

Publications (2)

Publication Number Publication Date
EP1961531A1 EP1961531A1 (fr) 2008-08-27
EP1961531B1 true EP1961531B1 (fr) 2013-09-18

Family

ID=38561744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08358003.5A Active EP1961531B1 (fr) 2007-02-26 2008-02-25 Dispositif de serrage à bras de manoeuvre escamotable et appareil comportant un tel dispositif

Country Status (15)

Country Link
US (1) US8365420B2 (ko)
EP (1) EP1961531B1 (ko)
JP (1) JP5179515B2 (ko)
KR (1) KR101430562B1 (ko)
CN (1) CN101668618B (ko)
AU (1) AU2008235392B2 (ko)
BR (1) BRPI0807820A2 (ko)
CA (1) CA2679079C (ko)
ES (1) ES2436021T3 (ko)
FR (1) FR2913076B1 (ko)
HK (1) HK1137697A1 (ko)
MX (1) MX2009009057A (ko)
NZ (1) NZ579607A (ko)
RU (1) RU2444433C2 (ko)
WO (1) WO2008122716A1 (ko)

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FR2912949B1 (fr) * 2007-02-26 2009-04-24 Pellenc Sa Scie a chaine munie d'un dispositif de reglage de la tension de la chaine de coupe
CA2729341C (en) * 2008-06-24 2016-06-07 Mtd Products Inc Torque-limited chain tensioning for power tools
US20110314682A1 (en) * 2009-03-18 2011-12-29 Markus Maag Quick-tightening device for a chain saw and chain unit for same
JP4996702B2 (ja) * 2010-01-28 2012-08-08 株式会社丸山製作所 チェンソー
US9132568B2 (en) 2011-10-11 2015-09-15 Echo, Inc. Chainsaw with cutting chain tensioner
DE102011115720A1 (de) * 2011-10-12 2013-04-18 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät mit einem Schutz
CN104114338B (zh) * 2011-12-15 2016-03-30 胡斯华纳有限公司 链锯杆/链条包装技术及其采用的包装
DE102012211102A1 (de) * 2012-06-28 2014-01-02 Robert Bosch Gmbh Werkzeugkopplungsvorrichtung
US9616555B2 (en) * 2012-10-26 2017-04-11 Ridge Tool Company Basin wrench
DE102013003850A1 (de) * 2013-03-06 2014-09-25 Andreas Stihl Ag & Co. Kg Handgeführtes Arbeitsgerät mit einer Spannvorrichtung für eine Kette
JP6360658B2 (ja) * 2013-03-29 2018-07-18 株式会社マキタ チェンソーのチェーン張力調整装置
JP6026943B2 (ja) * 2013-03-29 2016-11-16 株式会社マキタ チェンソーのガイドバー締結装置
USD742707S1 (en) 2013-04-01 2015-11-10 Ridge Tool Company Tool head
USD717619S1 (en) 2013-04-01 2014-11-18 Ridge Tool Company Tool handle
USD739192S1 (en) 2013-04-01 2015-09-22 Ridge Tool Company Insert for tool
EP2815848B1 (en) * 2013-06-21 2019-02-27 Stanley Works (Europe) GmbH A slogging wrench
USD748958S1 (en) 2014-08-29 2016-02-09 Ridge Tool Company Wrench
USD749924S1 (en) 2014-08-29 2016-02-23 Ridge Tool Company Wrench
USD750944S1 (en) 2014-08-29 2016-03-08 Ridge Tool Company Wrench
CN106466736B (zh) * 2015-08-14 2019-01-04 南京德朔实业有限公司 动力工具
CN109048741B (zh) * 2018-10-26 2020-06-30 山东世通高分子材料有限公司 一种六角螺母拆卸器
US11958169B2 (en) * 2020-10-26 2024-04-16 David Levins Chainsaw accessory

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US7743513B1 (en) * 2006-10-31 2010-06-29 Mtd Products Inc Chainsaw tensioning device

Also Published As

Publication number Publication date
JP5179515B2 (ja) 2013-04-10
CA2679079C (fr) 2014-04-22
ES2436021T3 (es) 2013-12-26
NZ579607A (en) 2011-08-26
RU2444433C2 (ru) 2012-03-10
US20100146801A1 (en) 2010-06-17
CA2679079A1 (fr) 2008-10-16
EP1961531A1 (fr) 2008-08-27
JP2010519058A (ja) 2010-06-03
CN101668618B (zh) 2013-05-15
KR101430562B1 (ko) 2014-08-14
BRPI0807820A2 (pt) 2014-06-17
US8365420B2 (en) 2013-02-05
AU2008235392A1 (en) 2008-10-16
KR20090127894A (ko) 2009-12-14
CN101668618A (zh) 2010-03-10
RU2009135789A (ru) 2011-04-10
WO2008122716A1 (fr) 2008-10-16
HK1137697A1 (en) 2010-08-06
AU2008235392B2 (en) 2013-11-21
FR2913076B1 (fr) 2010-10-22
FR2913076A1 (fr) 2008-08-29
MX2009009057A (es) 2010-01-15

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