EP1764473B1 - Spring tension - Google Patents

Spring tension Download PDF

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Publication number
EP1764473B1
EP1764473B1 EP05108502A EP05108502A EP1764473B1 EP 1764473 B1 EP1764473 B1 EP 1764473B1 EP 05108502 A EP05108502 A EP 05108502A EP 05108502 A EP05108502 A EP 05108502A EP 1764473 B1 EP1764473 B1 EP 1764473B1
Authority
EP
European Patent Office
Prior art keywords
collar
wrench
engagement
spring
splined
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
EP05108502A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1764473A1 (en
Inventor
Patrick Holmbom
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.)
Crawford Group AB
Original Assignee
Cardo Entrance Solutions AB
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
Priority to DE602005023307T priority Critical patent/DE602005023307D1/de
Application filed by Cardo Entrance Solutions AB filed Critical Cardo Entrance Solutions AB
Priority to DK05108502.5T priority patent/DK1764473T3/da
Priority to AT05108502T priority patent/ATE479818T1/de
Priority to EP05108502A priority patent/EP1764473B1/en
Priority to RU2008114491/03A priority patent/RU2403363C2/ru
Priority to PCT/SE2006/001028 priority patent/WO2007032725A1/en
Priority to CN2006800337767A priority patent/CN101263274B/zh
Publication of EP1764473A1 publication Critical patent/EP1764473A1/en
Application granted granted Critical
Publication of EP1764473B1 publication Critical patent/EP1764473B1/en
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
    • B25B13/48—Spanners; Wrenches for special purposes
    • 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
    • B25B13/46—Spanners; Wrenches of the ratchet type, for providing a free return stroke of the handle
    • 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
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
    • B25B27/30—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same positioning or withdrawing springs, e.g. coil or leaf springs
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E06B9/174—Bearings specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/62—Counterweighting arrangements

Definitions

  • the invention relates to a method for adjusting tension in springs mounted upon rotatable shafts. Furthermore, the invention relates to a wrench suitable for utilizing the method. Moreover, the invention relates to a collar system adapted for receiving said wrench.
  • the installation of industrial, residential and in particular overhead doors usually involves installing guides that support each side of a moveable door structure and upon which the sides of the door structure are freely slideable.
  • some sort of counterbalancing device is usually provided so that the full weight of the moveable door structure is not encountered when the moveable door structure is transferred between an opened and closed condition or vice versa.
  • a counter balance device is provided so as to be able to reduce the horsepower requirements of the drive motor. For safety reasons the counter balancing device is also necessary in the event of failure of the door openers.
  • a prevailing type of counter balancing device in wide use with such door openers, especially ones that have power operated motors to assist the opening and closing of the doors, is a coiled spring mounted upon a rotatable shaft.
  • the shaft is usually located above the opening that is to be covered by the door and is transversely located across the path of the door.
  • a coiled spring in a somewhat concentric manner such that the longitudinal centerline of the spring approximately locates upon the longitudinal centerline of the shaft.
  • One end of the spring is fixedly attached to a structure upon which the shaft is rotatably mounted and the other end of the spring is held releasably attached to the rotatable shaft.
  • the tensioning for the door takes the form of adjusting the tension exerted by the coiled spring upon the rotatable shaft that also holds a wound drag element usually attached to the lowermost end of the door.
  • the tension exerted by the spring is supposed to just about counterbalance the weight of the door that is being transferred during opening and closing movement.
  • the counterbalancing effect of the weight of the door may origin from the mid of the door for some roller door arrangements or arranged such that it origins from a fully opened condition.
  • To adjust the tension of the spring it is necessary for one to loosen the releasably fixed end of the coil spring that is attached to the rotatable shaft and rotate the end of the spring relative to the shaft, either in a manner to lessen the tension or to tighten the tension.
  • the prevailing method in today's door industry is to adjust tension of the spring during installation on location of the door and afterwards during service and maintenance.
  • An adapter is conventionally applied on the shaft for providing a possibility to wind the shaft by means of iron bars or the like stuck into one of the holes provided on the adapter.
  • one common way of locking the spring retainer and thus the spring in relation to the shaft is to fix the spring retainer by one or more wedges between the shaft and a space provided in the spring retainer. The wedge/s are released in the axial direction and sometimes it may be that there is no room for fixing the adapter on the shaft if the wedges are to be pulled out.
  • a method for adjusting tension in springs mounted upon rotatable shafts comprises the steps of, applying a first and a second wrench for splined engagement with a collar of said shaft so as to hold the collar against movement in an undesired direction, said collar being connected to at least one spring, adjusting tension in said at least one spring by winding said collar with at least one of said wrenches until an appropriate tension of the spring is achieved.
  • the collar comprises a locking device for fixing said collar to said shaft when the tension of the spring is properly adjusted.
  • the axial locking engagement is maintained during a whole spring tension adjusting cycle, involving splined disengagement during alternation of said wrenches.
  • the axial locking engagement is enabled by a tongue and groove engagement in which said tongue propagates circumferentially and in the transverse direction (B) in relation to the axial direction (A).
  • the axial locking device engagement comprises a tongue and groove locking relative to the axial direction (A) of the shaft.
  • the axial locking device comprises a U-shaped retractable plate for complementary engagement with a recess in said collar.
  • the collar comprises a U-shaped protruding portion for complementary engagement with a recess in said axial locking device.
  • the splined engagement of the wrench and collar is accomplished with a wrench spline angle less than 90 degrees and preferably between 80 and 90 degrees.
  • a complementary fit of the splines of the wrench and the splines of the collar reduces the risk for slipping. It has been discovered that an angle between the front edge of the wrench spline of slightly less than 90 degress measured between the inner near surface of the jaw and said front edge provides for improved grip.
  • the splined engagement involves engagement with splines propagating in the axial direction (A) of said shaft.
  • a further advantage is that the splined engagement is controllable by a latch function maneuverable from a latch operating handle of said wrench. Hence, the serviceman or installer do not have to change the grip of the wrench handle e.g when disengaging the splined engagement when adjusting tension.
  • the torque of said splined engagement is controllable and lockable by a torque locking mechanism being maneuverable from said wrench.
  • each wrench having an open ended jaw, with a close fit around a substantial portion of said collar and said opened ended jaw being provided for splined engagement with said collar.
  • the method of adjusting tension in springs is particularly well suited for a group consisting of overhead sliding doors, sliding doors and winding roller doors according to any one of the preceding claims.
  • the skilled person knowing of the invention may however find other areas of interest.
  • a wrench assembly which comprises, an elongate handle, an open ended jaw formation located on one end of said handle for closely surrounding and engaging a majority of the perimeter of a splined shaft, a spring loaded spline latch mechanism mounted on said handle and having a latch that, in a first position, protrudes into a jaw engagement area for splined engagement on said shaft and, in a second position is retracted from the jaw engagement area for splined disengagement, a latch operating device for moving said latch from one of said first position and said second position to the other of said first and second position.
  • the wrench spline angle is less than 90 degrees and preferably between 80 and 90 degrees.
  • the splined engagement is controllable by a latch maneuverable from a latch operating handle of said wrench assembly.
  • the disengagement of said splined engagement is prevented by a spring loaded spline latch mechanism as long as the latch is subject to an external loading resulting from the splined engagement.
  • the latch operating handle is operatively connected to the latch via a spring. If the loading on the latch exceeds the loading from the spring resulting from activating the latch operating handle the latch will remain in position for splined engagement, i.e. the force provided by the spring too the spring loaded latch mechanism is too low to disengage the splined engagement.
  • the installer or serviceman due to a mistake let go of both splined engagements at the same time at least one wrench when arranged properly will maintain the splined engagement.
  • the spring load in the spring loaded splined engagement is preferably provided by a push spring.
  • the push spring is connected to a rod of the latch.
  • the latch operating handle is operatively connected to the rod of the latch via a spring.
  • the spring characteristics of the push spring is low. Since the wrench spline angle is less than 90 degrees and preferably between 80 and 90 degrees the external loading does not have to be substantial in order to provide enough resistance to disengagement.
  • the latch operating handle is released the latch is pushed back in position for splined engagement in the jaw area by said push spring.
  • the torque of said splined engagement is controllable and lockable by a torque locking mechanism being maneuverable from said wrench assembly.
  • a torque locking mechanism being maneuverable from said wrench assembly.
  • the wrench assembly is provided with a hook for enabling hanging of said wrench assembly. It is realized that many doors requires such work on a substantial altitude and the hook facilitates for such situations.
  • the wrench assembly is provided with replaceable handle portions in order to enable a wrench assembly with different lengths.
  • the replaceable handle portion having the most suitable length may be screwed on to the elongate handle of the wrench assembly.
  • the handle is provided with a knob on the end portion in order to facilitate picking up of said wrench assembly.
  • the knob extends from the handle portion to an extent such that if there is a risk for an operator's fingers to become pinched between a structural element, such as a wall, and the handle portion the knob will provide enough room there between to avoid serious finger pinching.
  • a further object with the knob is to enable protection against slipping of the wrench in that it provides for support against loosing the grip during use in the axial direction of the elongate handle.
  • a collar system for being rotatably mounted upon a shaft and thus enabling tensioning of springs mounted upon rotatable shafts is presented, which collar system comprises, a secondary attachment portion adapted for connection to one end of said spring mounted upon said shaft, a primary attachment portion on said collar having longitudinally (C) extending splines formed on the outer periphery of said primary attachment portion.
  • the secondary attachment portion and the primary attachment portion form one unit.
  • the collar system comprises a locking device for fixing said collar to said shaft. During this step holding of one wrench against the spring tension is sufficient and allows for fixing the collar in relation to the shaft when the tension in the spring is properly adjusted.
  • said collar system comprises a body formed for attachment to at least said primary attachment portion, said body comprising complementary engagement means on its inside and holes propagating from the outside towards the inside of said body, said holes being arranged for receiving an alternative tension adjusting tool such as an iron bar.
  • This body enables the use of a currently conventional method of adjusting springs, using bars, e.g. in case wrenches of the preferred type is not available
  • said holes are arranged at given distances around a periphery of said body when following the periphery in the transverse (D) direction.
  • a coiled spring 57 is arranged around a shaft and fixed arranged to the surrounding structure of the door in one end (not shown). This represents a more typical type of spring tensioned shafts for doors that are designed for being wound up today.
  • a collar 50 is threaded onto the coiled spring 57 from the side such that a flange 55 follows the spiral path of the coiled spring 57.
  • a connecting element 59 is provided on the collar for connection with the end portion of the coiled spring, which is normally cranked. When the cranked end portion connects with the connecting element 59 the collar 50 is fixed in relation to the coiled spring 57 which is held between the flange 55 and connecting element 59.
  • the collar 50 is however rotatable in relation to said shaft.
  • the rotatable collar will have a set of screws 56 that may be positioned so as to engage the shaft member and hold the collar non-rotatable with the shaft.
  • the primary attachment portion 51 on said collar 50 has longitudinally (C) extending splines 52 formed on the outer periphery of said primary attachment portion 51, and said primary attachment portion (51) is provided with at least one groove propagating transverse (D) to said splines 52.
  • the secondary attachment portion 54 and the primary attachment portion 51 form one unit.
  • a wrench assembly 1 having an elongate handle 2 an engagement section in the form of an open ended jaw 3 is disclosed.
  • the wrench is designed so that the area within the engagement section will form a close fit over the outer diameter of the splined section of the collar 50.
  • the spline latch mechanism 4 is protruding upwardly so that the engaging splines of the wrench 15 is in the area of the engagement section 3.
  • a lever arm activates the recessed tongue for axial locking of the wrench 1.
  • a pull of the latch operating device 5 towards the elongate handle 2 allows the plunger member to travel inwardly pulling the spline latch mechanism 4 in to the elongate handle 2.
  • the engagement section 3 may then be slid over the spline section of adapter.
  • two wrenches 1, 1' may engage the spline section of the collar 50.
  • the set screws 56 on the rotatable collar 50 may be loosened.
  • the rotatable collar 50 is loosened from its connection of the shaft wrenches 1, 1' may be used to hold collar 50 from rotating on the shaft.
  • the second wrench may have the latch operating device 5 activated so as to disengage its wrench splines 15 from the spline section of collar 50.
  • the second wrench 1' may then be advanced pivotal around the splined section of the collar 50.
  • the spline latch mechanism 4 may be released so that its wrench splines 15 engages the spline section of collar 50.
  • the latch operating device 5 of the first wrench 1 may be activated so that spline latch mechanism 15 is disengaged from the splines of the collar.
  • the second wrench 1' may now be rotated back until its elongated handle 2 is in alignment with the first wrench 1.
  • the spline latch mechanism 4 comprises a tensioned push spring 13 working against a rod 6 connecting said latch operating device 5 with said spline latch mechanism 4.
  • the disengagement of said splined engagement is prevented by a spring loaded spline latch mechanism 4 as long as the latch 15 is subject to an external loading resulting from the splined engagement.
  • the latch operating handle 5 is operatively connected to the spline latch mechanism 4 via a spring 13. If the loading on the latch 15 exceeds the loading from the spring 13 resulting from activating the latch operating handle 5 the latch 15 will remain in position for splined engagement, i.e. the force provided by the spring 13 to the spring loaded latch mechanism 4 is too low to disengage the splined engagement.
  • the installer or serviceman due to a mistake activate the latch operating handles 5 of bothe wrenches at the same time at least one wrench when arranged properly will maintain the splined engagement due to the external loading from the coiled spring.
  • the spring load in the spring loaded splined engagement is preferably provided by a push spring.
  • the push spring is connected to a rod of the latch.
  • the latch operating handle is operatively connected to the rod of the latch via a spring.
  • the spring characteristics of the push spring is low. Since the wrench spline angle is less than 90 degrees and preferably between 80 and 90 degrees the external loading does not have to be substantial in order to provide enough resistance to disengagement.
  • the latch operating handle is released the latch is pushed back in position for splined engagement in the jaw area by said push spring.
  • the torque resistance of said splined engagement is controllable and lockable by a torque locking mechanism 14 being maneuverable from said wrench assembly.
  • the torque locking mechanism 14 consist of a screw or similar attached through the wall of the elongated handle 2.
  • the screw may enter a pocket of the spline latch mechanism 4 from the side and support the bottom of the pocket. At the same time the pocket is stretched in the axial direction of the elongated handle 2 so as to allow for movement of the spline latch mechanism 4 if activated.
  • the wrench assembly 1 has an asymmetric opening of the open ended jaw 3.
  • the axial locking engagement is enabled by a tongue and groove engagement in which said tongue propagates circumferentially and in the transverse direction (B) in relation to the axial direction (A). This is probably more clear in fig 2 .
  • the axial locking device comprises a U-shaped retractable plate for complementary engagement with a recess in said collar 50.
  • the collar may comprise a U-shaped protruding portion for complementary engagement with a recess in said axial locking device.
  • the wrench assembly 1 is provided with a hook 18 for enabling hanging of said wrench assembly 1. It is realized that many doors requires such work on a substantial altitude and the hook 18 facilitates for such situations since there is often not so much space for laying tools when not used.
  • the wrench assembly 1 is provided with replaceable handle portions 23 in order to enable a wrench assembly 1 with different lengths.
  • the replaceable handle portion 23 having the most suitable length may be screwed on to the elongate handle of the wrench assembly (not shown).
  • a further feature of the invention is that the handle 23 is provided with a knob 24 on the end portion in order to facilitate picking up said wrench assembly.
  • the knob extends from the handle portion to an extent such that if there is a risk for an operator's fingers to become pinched between a structural element, such as a wall, and the handle portion the knob will provide enough room there between to avoid serious finger pinching.
  • a further object with the knob is to enable protection against slipping of the wrench in that it provides for support against loosing the grip during use in the axial direction of the elongate handle. It is appreciated that the various features for enabling improved tension adjustment described in the above given examples may readily be combined in various ways without departing from the scope of protection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Springs (AREA)
EP05108502A 2005-09-15 2005-09-15 Spring tension Active EP1764473B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK05108502.5T DK1764473T3 (da) 2005-09-15 2005-09-15 Fjederspænding
AT05108502T ATE479818T1 (de) 2005-09-15 2005-09-15 Federspannung
EP05108502A EP1764473B1 (en) 2005-09-15 2005-09-15 Spring tension
DE602005023307T DE602005023307D1 (de) 2005-09-15 2005-09-15 Federspannung
RU2008114491/03A RU2403363C2 (ru) 2005-09-15 2006-09-08 Напряжение пружины
PCT/SE2006/001028 WO2007032725A1 (en) 2005-09-15 2006-09-08 Spring tension
CN2006800337767A CN101263274B (zh) 2005-09-15 2006-09-08 弹簧张力

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05108502A EP1764473B1 (en) 2005-09-15 2005-09-15 Spring tension

Publications (2)

Publication Number Publication Date
EP1764473A1 EP1764473A1 (en) 2007-03-21
EP1764473B1 true EP1764473B1 (en) 2010-09-01

Family

ID=35809666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05108502A Active EP1764473B1 (en) 2005-09-15 2005-09-15 Spring tension

Country Status (7)

Country Link
EP (1) EP1764473B1 (da)
CN (1) CN101263274B (da)
AT (1) ATE479818T1 (da)
DE (1) DE602005023307D1 (da)
DK (1) DK1764473T3 (da)
RU (1) RU2403363C2 (da)
WO (1) WO2007032725A1 (da)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6302179B1 (en) * 1998-01-16 2001-10-16 James V. Miller Modular roll-up partition system with tension adjustment mechanism
US6527037B2 (en) * 2001-05-16 2003-03-04 Wayne-Dalton Corp. Rolling door tensioner
US20040020609A1 (en) * 2002-04-10 2004-02-05 Canimex Inc. Ratchet-like system for winding a rolling door assembly
US20040211298A1 (en) * 2003-04-10 2004-10-28 Williams Donald Edward Shock absorber system adjustment device
SE527594C2 (sv) * 2004-01-02 2006-04-18 Gunnar Kemppainen Spärrelement med ett griporgan och ett spärrorgan avsett för ett roterbart fästelement

Also Published As

Publication number Publication date
EP1764473A1 (en) 2007-03-21
RU2008114491A (ru) 2009-10-20
DK1764473T3 (da) 2010-11-15
ATE479818T1 (de) 2010-09-15
CN101263274A (zh) 2008-09-10
WO2007032725A1 (en) 2007-03-22
RU2403363C2 (ru) 2010-11-10
DE602005023307D1 (de) 2010-10-14
CN101263274B (zh) 2012-08-08

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