EP2479133A2 - Hebevorrichtung mit Lastanzeige - Google Patents

Hebevorrichtung mit Lastanzeige Download PDF

Info

Publication number
EP2479133A2
EP2479133A2 EP12151371A EP12151371A EP2479133A2 EP 2479133 A2 EP2479133 A2 EP 2479133A2 EP 12151371 A EP12151371 A EP 12151371A EP 12151371 A EP12151371 A EP 12151371A EP 2479133 A2 EP2479133 A2 EP 2479133A2
Authority
EP
European Patent Office
Prior art keywords
load
lifting apparatus
gauge
gearing
attachment
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.)
Withdrawn
Application number
EP12151371A
Other languages
English (en)
French (fr)
Other versions
EP2479133A3 (de
Inventor
David Hunt
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2479133A2 publication Critical patent/EP2479133A2/de
Publication of EP2479133A3 publication Critical patent/EP2479133A3/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/12—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable
    • B66D3/16—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable operated by an endless chain passing over a pulley or a sprocket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear
    • B66D1/58—Safety gear responsive to excess of load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/12—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable
    • B66D3/14—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable lever operated

Definitions

  • the present invention relates to load indicating lifting apparatus especially manually operated chain-block lifting apparatus and lever hoist apparatus.
  • a chain block apparatus generally comprise a body, a hook to attach the body to a substrate or structure above load and user, a chain that may be connected to the load, and a chain which the user pulls to lift the load. Both these chains may be interconnected around a two pulley gear system.
  • a lever hoist is similar, albeit a lever is provided in place of the chain which the user pulls.
  • the body will include a gearing means and a clutch or ratchet mechanism, such that the force applied by the user is geared to provide a mechanical advantage to allow loads ordinarily beyond the user's strength to be lifted.
  • the clutch or ratchet mechanism may be provided to allow the user to discontinue application of manual force without the load being released.
  • lifting apparatus comprising gearing apparatus, a manually actuated input connected to the gearing apparatus, a load bearing attachment connected to the gearing means, and a load gauge.
  • the load gauge may be adapted to provide an indication of the load borne by the apparatus in use.
  • manually actuated it will be understood by the skilled addressee that the manual application of force by a user is intended, that force may be enhanced by a mechanical advantage provided by the gearing means, rather than the actuation of a powered apparatus by depressing a switch for example.
  • the lifting apparatus may include a body or framework upon or in which the gearing apparatus is mounted, and may include an apparatus attachment to enable the body or framework to be attached to a support structure or framework.
  • the load gauge may be connected between the apparatus attachment and the body or framework, to enable measurement of the load carried to be determined by the resultant reaction force between the apparatus attachment and the body or framework.
  • the load gauge may be connected between the load bearing attachment and a load to be lifted, or between load bearing attachment and gearing apparatus, or between manually actuated input and user or between manually actuated input and gearing apparatus.
  • the body or framework may be provided with a socket for mounting at least part of the load gauge within, and it may be provided with an inwardly extending flange about a first edge to retain the at least part of the load gauge within it.
  • the apparatus attachment may connect to the at least part of the load gauge within the socket, such that resultant forces acting upon a loaded apparatus transmit through the at least part of the load gauge within the socket.
  • the apparatus attachment may be a hook.
  • the load gauge may include a load cell, and this may be a mechanical load cell. Alternatively or in addition, the load gauge may include an electronic load cell.
  • the load gauge may further include a visual output, which may be in the form of an electronic visual display such as an LCD or LED output, and/or may include a needle and dial display.
  • a sonic output or alarm may be provided to indicate when a particular load threshold has been reached.
  • a lifting apparatus 10 comprising a body 12, a manually actuated input chain 14 which is gear connected via a gearing apparatus 15 to an output chain 16 having a load bearing hook 18 attached its end.
  • the load bearing hook in this embodiment is a gated hook, with a spring loaded gate 18a.
  • the gearing system between input chain 14 and output chain 16 will be of a known type; for example the input chain 14 and output chain 16 will each be wound around the gearing apparatus 15 which comprises two axially attached gear wheels, pulleys or sheaves, with the wheels/pulleys/sheaves being of different radii.
  • the input chain 14 and output chain 16 hang downwardly from the gearing apparatus 15.
  • the output chain 16 being anchored to the body 12 and being wound around the gearing apparatus 15 from the body 12 in two sections: an output chain loop 16a (from an anchor point 16b on the body 12 to gearing apparatus 15) and an output chain hook portion 16c (from gearing apparatus 15 to load bearing hook 18).
  • the difference in radii of the gear wheels of the gearing apparatus 15 provides the mechanical advantage to enable the user to hoist large loads.
  • An attachment apparatus in the form of an attachment hook 20 extends upwardly from the body 12.
  • the attachment hook 20 is a gated hook with a spring loaded gate 20a.
  • the attachment hook 20 is located within a housing 22 which extends from the body 12.
  • the housing 22 includes a socket formation 24 within it.
  • the housing 22 and socket formation 24 are formed from the body 12 comprising a main body portion 12a and a body cover 12b, both of which have upwardly extending portions (a main body portion housing portion 22a and a body cover housing portion 22b) which cooperate to form the housing 22 and socket formation 24.
  • Both the main body portion housing portion 22a and the body cover housing portion 22b are similar to one another, and comprise a hollow semi frusto-conical / trumpet shaped sidewall extensions which cooperate to form the semi frusto-conical / trumpet shaped housing 22 when assembled.
  • the housing 22 tapers from a larger diameter adjacent the body 12, to a lesser diameter at the distal end. At the distal end, an inwardly projecting flange 26 is provided around a housing aperture 28, which communicates with the socket formation 24.
  • a mechanical load cell 36 is located within the socket formation 24. It comprises a cylindrical main body 38 extending axially from which is a threaded boss 40. Two lugs 42 project radially from the sidewall 45 of the mechanical load cell 36. A load cell flange 44 is formed on the upper fascia 46 of the cylindrical main body 38 between the rim 48 of the upper fascia 46 and the lower edge of the threaded boss 40.
  • a first connection 50 is attached to the distal end of the mechanical load cell 36 from the threaded boss 40.
  • the attachment hook 20 connects to the mechanical load cell 36 via the threaded boss 40.
  • the dynamometer flange 44 forms an interference fit with the inwardly projecting flange 26 of the housing 22.
  • On the inner surface of the housing 22 are two housing sockets 52, which cooperate with the lugs 42 to form a further interference fit.
  • the mechanical load cell 36 works in a known manner which will be appreciated by the skilled addressee.
  • the mechanical load cell 36 transmits the load indication it creates through a first connection 50 and a second connection 54 finally displaying that upon a needle and dial display arrangement 56.
  • the needle and dial display arrangement 56 is provided on the body cover 12b.
  • a display dial housing 58 is provided with waterproof sealing means and protective bars 60 which cooperate to encase the needle and dial display arrangement 56 and mitigate potential damage.
  • Threaded body bosses 62 project from a side fascia 64 of the main body portion 12a. These extend generally perpendicularly to the general plane in which the attachment hook 20 extends upwardly within, and the input chain 14 and output chain 16 hang downwardly within.
  • Body cover apertures 64 are provided at corresponding locations on the body cover 12b and, along with large nuts 66, allow the mechanical attachment of the body cover 12b to the main body portion 12a.
  • attachment hook 20 will be hooked onto a suitable support structure (not shown) or other suitable suspension means.
  • a load such as an engine, will be attached to the apparatus 10 using the load bearing hook 18.
  • the user will pull input chain 14 in a known manner, thus causing the output chain loop 16a to become greater, the output chain hook portion 16c to become shorter, the load bearing hook 18 to ascend, and the load to be borne by the apparatus 10.
  • the weight of the load pulls the body 12 down, causing a reaction force to act through the mechanical load cell 36 via the interference fit provided between the inwardly projecting flange 26 of the housing 22 and the dynamometer flange 44 and the attachment hook 20.
  • the mechanical load cell 36 causes the needle and dial display arrangement 56 to display the weight and/or mass of the load.
  • a second embodiment lifting apparatus 110 is shown in Figs. 5 to 8 . Elements identical or largely similar to those described in the first embodiment are numbered similarly, albeit prefixed with a "1", apart from as described below.
  • the first embodiment has a largely mechanical load gauge arrangement to indicate load acting upon apparatus 10.
  • an electronic load gauge arrangement is provided.
  • a load cell 136 is housed within housing 122.
  • the load cell 136 comprises a cylindrical main body 138 with a hook-engaging threaded boss 140 extending upwardly from it, and a block-engaging threaded boss 141 extending downwardly from it.
  • a load cell flange 144 is formed on the upper fascia 146 of the cylindrical main body 138 between the rim 148 of the upper fascia 146 and the lower edge of the hook-engaging threaded boss 140.
  • a load cell fixing block 143 connects to the load cell flange 144 via the block-engaging threaded boss 141.
  • Two lugs 142 project radially from the sidewall 145 of the load cell fixing block 143.
  • the load cell 136 works in a known manner: loads acting upon it create electrical signals proportional to the load, and these electrical signals may be converted to an indication of the load.
  • the attachment hook 120 connects to the load cell 136 via the hook-engaging threaded boss 140.
  • the load cell flange 144 forms an interference fit with the inwardly projecting flange 126 of the housing 122.
  • On the inner surface of the housing 122 are two housing sockets 152, which cooperate with the lugs 142 to form a further interference fit.
  • the electrical signals emanating from the load cell 136 pass through a cable 150 and to a digital display arrangement 156.
  • the digital display arrangement 156 comprises a power source 157 (in this case a rechargeable battery pack), a circuit board 159 that converts the electrical signals from the load cell 136, a sonic alarm 159a mounted on the circuit board which produces a sound when a predetermined load threshold has been reached or exceeded, LEDs 159b which likewise flash or activate when a predetermined load threshold has been reached or exceeded, a digital display housing 158, an LCD display 161 which displays an indication of the load, control buttons 163 connected to the circuit board allowing for the control of the display (for example to change the units of measurement the display uses or to set a load threshold) and protective bars 160 to mitigate damage to the digital display arrangement 156.
  • a power source 157 in this case a rechargeable battery pack
  • a circuit board 159 that converts the electrical signals from the load cell 136
  • a sonic alarm 159a mounted on the circuit board which produces a sound when a predetermined load threshold has been reached or exceeded
  • LEDs 159b which likewise flash or
  • the digital display housing 158 includes a power charging access aperture 158a to enable a power cable (not shown) to be connected to the power source 157 to recharge it.
  • a bung 158b is provided to seal the power charging access aperture 158a when in normal use i.e. when not being charged.
  • Operation of the second embodiment is largely similar to the first, albeit the load acting upon the apparatus 110 is converted to electrical signals generated by the load cell 136 which are interpreted by circuit board 159 and displayed via the LCD display 161. Should the user set a load threshold and that threshold be exceeded in use, the sonic alarm 159a and LEDs 159b may activate to warn the user.
  • a third embodiment lifting apparatus 210 is shown in Figs. 9 and 10 . Elements identical or largely similar to those described in the first and second embodiment are numbered similarly, albeit prefixed with a "2", apart from as described below.
  • the lifting apparatus 210 uses a similar mechanical load cell arrangement as the first embodiment apparatus 10. The difference is that instead of an input chain 14, the lifting apparatus has as its input a lever 214. Operation of the lifting apparatus 210 is similar to the previously described embodiments, albeit the lever 214 is reciprocated by the user which causes the output chain loop 216a to become greater, the output chain hook portion 216c to become shorter, the load bearing hook 218 to ascend, and the load to be borne by the apparatus 210.
  • a fourth embodiment lifting apparatus 310 is shown in Figs. 11 and 12 . Elements identical or largely similar to those described in the first, second and third embodiments are numbered similarly, albeit prefixed with a "3", apart from as described below.
  • the lifting apparatus 310 uses a similar load cell arrangement as the second embodiment apparatus 110, but uses a lever 314 in place of an input chain 114, similar to the third embodiment.
  • the present invention provides manually operated lifting apparatus that can indicate to the user the load being carried by it, and allow mitigation of hazardous situations.
  • the load gauges being either mechanically actuated, or having internal power supplies, provides such indications without the apparatus needing to be connected to an external power source.
  • the load berating attachments may be rotatable or may swivel in relation to the rest of the apparatus.
  • the load gauge may be in the form of load pin inserted longitudinally through the gearing system. Further load gauging arrangements are possible and will be appreciated by the skilled addressee.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)
EP12151371A 2011-01-21 2012-01-17 Hebevorrichtung mit Lastanzeige Withdrawn EP2479133A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB201101081A GB201101081D0 (en) 2011-01-21 2011-01-21 Load indicating lifting apparatus

Publications (2)

Publication Number Publication Date
EP2479133A2 true EP2479133A2 (de) 2012-07-25
EP2479133A3 EP2479133A3 (de) 2013-01-16

Family

ID=43769428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12151371A Withdrawn EP2479133A3 (de) 2011-01-21 2012-01-17 Hebevorrichtung mit Lastanzeige

Country Status (2)

Country Link
EP (1) EP2479133A3 (de)
GB (1) GB201101081D0 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3776514A (en) * 1971-04-28 1973-12-04 Dresser Ind Overload regulator for lever hoists
DE202005009410U1 (de) * 2005-06-15 2005-11-03 Hsieh, Chih-Ching, Feng-Yuan Eine riemenanspannende Vorrichtung mit Display zur Spannungsanzeige
CN101913538B (zh) * 2010-08-18 2013-06-12 尹波 一种葫芦

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
GB201101081D0 (en) 2011-03-09
EP2479133A3 (de) 2013-01-16

Similar Documents

Publication Publication Date Title
CN105501452B (zh) 一种直升机用货物挂钩装置及其方法和控制方法
CN101780926B (zh) 履带起重机力矩限制系统
WO2007103155A3 (en) Lifting sling with excessive elongation warning indicator
KR20090069823A (ko) 로울러형 하중검출장치를 이용한 크레인의 안전제어시스템
JP2012524010A (ja) ホイスト
CN109506821B (zh) 一种动滑轮测力计及使用方法
EP2479133A2 (de) Hebevorrichtung mit Lastanzeige
CN102295224A (zh) 一种具有超载保护功能的卸扣
CN202265293U (zh) 一种具有超载保护功能的卸扣
US11761579B2 (en) Load holder with levelling module and measurement module
CN1887679A (zh) 可称重钩
CN203187310U (zh) 起重吊钩形变监测装置
RU2746107C1 (ru) Демонтажное приспособление
KR102436738B1 (ko) 크레인 하중부품 수명예측 모니터링 시스템
CN207090802U (zh) 起重设备用吊钩及具有其的起重设备
CN211784334U (zh) 一种船舶绞车负载试验装置
GB201101527D0 (en) Apparatus for the measurement of forces applied to a telescopic boom to be displayed as a measurement of weight
JP2676101B2 (ja) ウィンチ等の過負荷警報装置
CN209740542U (zh) 一种起重机
CN204324778U (zh) 吊挂件安装结构、测力器和起重葫芦
CN102145858A (zh) 链式起重系统称重报警方法及其装置
KR101121689B1 (ko) 크레인 하중센서
JP2000264586A (ja) 電動ウインチの過負荷表示装置
CN102408050A (zh) 一种抗冲击载荷的施工升降机超载保护装置
CN207090799U (zh) 起重设备用吊钩及具有其的起重设备

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: B66D 3/14 20060101ALI20121210BHEP

Ipc: B66C 13/16 20060101AFI20121210BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20130717