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US3679012A - Assembly of block pulleys provided with a load measuring system - Google Patents

Assembly of block pulleys provided with a load measuring system Download PDF

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Publication number
US3679012A
US3679012A US142986A US3679012DA US3679012A US 3679012 A US3679012 A US 3679012A US 142986 A US142986 A US 142986A US 3679012D A US3679012D A US 3679012DA US 3679012 A US3679012 A US 3679012A
Authority
US
United States
Prior art keywords
cheeks
pulleys
assembly
support part
annular support
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.)
Expired - Lifetime
Application number
US142986A
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English (en)
Inventor
Georges Haulotte
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
Application granted granted Critical
Publication of US3679012A publication Critical patent/US3679012A/en
Assigned to SIMON, FRANCOIS reassignment SIMON, FRANCOIS ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HAULOTTE, GEORGES, BARBERA, FRANCE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
    • 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
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • 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
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/02—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a helical spring
    • G01G3/04—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a helical spring using a plurality of springs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
    • G01G3/08—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a leaf spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/02—Hoists or accessories for hoists
    • B66D2700/026—Pulleys, sheaves, pulley blocks or their mounting
    • B66D2700/028—Pulley blocks with multiple sheaves

Definitions

  • the invention relates to the assemblies which are made up of several pulleys, having a reception groove for a flexible pulley-block strap, mounted for rotation between cheeks connected by cross-pieces and which are provided with a system for measuring the load supported by these pulleys.
  • Such assemblies of pulleys are encountered in hoisting appliances, handling appliances or similar appliances. These assemblies can be effected in the form of movable blocks, or else be incorporated into the appliance itself, as is the case, for example, for the assemblies of pulleys mounted on the jib head of a crane.
  • the aim of the invention is to provide an assembly of block pulleys which does not have the aforesaid disadvantage of conventional assemblies.
  • one, at least, of the pulleys is carried by a part fixed in relation to the cheeks, while one, at least, of the pulleys is movable in its plane in relation to the cheeks under the action of the force exerted, by the flexible strap, on the said movable pulley, in opposition to an elastic system, the said movable pulley being linked to a movable control element carried by the one of the said cheeks and the position of which is determined by that ofthe movable pulley.
  • the same sensitivity of measurement of the load can be preserved for different numbers of block strands.
  • a block comprising one fixed pulley and one movable pulley
  • two strands on the movable pulley alone can be used and, for a double load, four strands can be used, namely two strands on the movable pulley and two strands on the fixed pulley, while preserving the same sensitivity of measurement, since the movable pulley is always subjected only to the same load in the two cases.
  • the movable pulley is in the shape of a grooved rim mounted for rotation on a recessed support part movable with regard to the cheeks, the elastic system being arranged inside the said recessed support part and interposed between the inner edge of this part and a cross-piece part connecting the cheeks through the recessed part.
  • FIG. I is a front view of the assembly
  • FIG. 2 is a section taken along the line lIlI of FIG. I
  • FIG. 3 is a section taken along the line III-III of FIG. 2
  • FIG. 4 is, on a larger scale, a section taken along the line IVIV of FIG. 3;
  • FIG. 5 shows the dial of the indicator device situated on the cheek opposite that visible in FIG. I.
  • the block represented in FIG. I and 2 comprises three pulleys, namely one central pulley l and two lateral pulleys 2, 3 mounted in the gaps between two outer cheeks 5, 6 and two inner cheeks 7, 8, connected one to another by stay-bolts II.
  • the upper part of the block is provided with a part 13 connected to the two upper stay-bolts and having an eye 14.
  • a suspension hook 17, for example of the gudgeon type, is mounted in the lower part of the outer cheeks 5, 6, preferably in a removable manner, by means of an pin 17 provided with a handle 18.
  • Handles 19 facilitate the manipulations of the block.
  • the three pulleys l, 2, 3 are constituted by simple grooved rims mounted for rotation, through the medium of rolling bodies, such as 24, on recessed parts 25, 26, 27 respectively, (see also FIG. 3), nevertheless one of these three parts, namely the support part 27 of the lateral pulley 3, is fixed rigidly in relation to the cheeks of the block, while the other two support parts 25, 26 are movable in relation to these latter.
  • the recessed support part 27 is pressed, by means of screws 33, between stay-bolts 31, 32 integral respectively with the cheeks 8 and 6.
  • the support part 25 is mounted pivotally, for example through the medium of ball bearings or needle bearings 35, on a shaft 37 fixed, by its two ends, by means of nuts 38, 39 in two corresponding holes of the outer cheek 5 and of the inner cheek 8, the said shaft traversing freely a corresponding hole of the other inner cheek 7.
  • the axis of the shaft 37 (see also FIG. 3) is off-set with regard to the geometric axis 41 of the assembly of the pulleys, laterally with regard to the general direction of the flexible stands 43 which pass over the pulleys.
  • the support part 25 can turn with regard to the checks of the block about the shaft 37, in the direction of the arrow f, in opposition to the force of an elastic restoring system constituted by a stacking of Belleville or Schnorr washers 44 (see also FIG.
  • the support part 25 carries a toothed sector 61 coaxial with the shaft 37 and in mesh with a toothed pinion 62 secured to one end of a shaft 63 which pivots in two bearings 64, 65 fixed, respectively, in the two ends of a sleeve 67 traversing the inner cheek 8 and the outer cheek 6 to which it is secured.
  • the other end of the shaft 63 carries a needle 68 movable in front of a scale 69 (FIG. 1) indicating loads in tons, for example, from 0 to 5 in this example.
  • the scale 69 is situated on a dial 72 formed by a part which is stamped in a cover 73 and which is concentric with the shaft 63 of the needle 68.
  • the mounting of the lateral pulley 2 is identical with that of the central pulley I.
  • the support part 26 of this outer pulley is connected to another indicating needle 68A which shifts in front of a dial 72A carried by a hood 73A fixed on the other outer cheek 5 of the block.
  • the elements of the transmission between the support part 26 and the needle 68A are similar to those which connect the support part 25 to the needle 68 and they have been designated by the same reference numbers as signed the indication A.
  • the dial 72A carries two scales 75, 76 which, in this example, extend respectively from O to 10 and from O to 15 tons.
  • the load can be read on the dial 72 (FIG. 1) the graduations of which extend from to tons maximum.
  • the loads are read on the scale 75 of the dial 72A (H6. 5) the values of which extend from 0 to tons, while if a pulley block having six single strands is used, that is to say the whole of the three pulleys, the value of the load is read from the scale 76 of the dial 72A the values of which extend from 0 to tons.
  • each of the single strands of the flexible strap 43 is subjected to a uniform maximum force of 2.5 tons and the opposing spring constituted by the stackings of Belleville washers, such as 44, always work in the same conditions, between the zero load and the maximum load, so that the sensitivity is the same, whatever the number of pulleys used for the pulley block.
  • the needle indicating device could be replaced by any other suitable indicating device and, for example, by a system of electrical contacts which would be actuated in response to the angular displacement of the pivoting support parts 25 and 26, in terms of the loads supported by the block.
  • a system of electrical contacts which would be actuated in response to the angular displacement of the pivoting support parts 25 and 26, in terms of the loads supported by the block.
  • Such an arrangement would be very advantageous also, for example, for assemblies of pulleys mounted on the jib head of a crane.
  • An assembly of pulleys having a reception groove for a flexible pulley-block strap comprising cheeks, cross-pieces connecting said cheeks, one at least of said pulleys being rotatably mounted between said cheeks on an axis fixed relative to said cheeks, one at least of said pulleys being rotatably mounted between said cheeks and movable in its own plane under the action of the force exerted by the flexible strap on said movable pulley, an elastic system acting on said movable pulley in opposition to said force exerted by the flexible strap on said movable pulley, and a mobile control element carried by one of said cheeks and operatively connected to said movable pulley.
  • An assembly pulleys according to claim 1 characterized in that it comprises two movable pulleys connected, respectively, to two mobile control elements carried, respectively, by

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Jib Cranes (AREA)
US142986A 1970-05-14 1971-05-13 Assembly of block pulleys provided with a load measuring system Expired - Lifetime US3679012A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7017582A FR2096667B1 (ja) 1970-05-14 1970-05-14

Publications (1)

Publication Number Publication Date
US3679012A true US3679012A (en) 1972-07-25

Family

ID=9055521

Family Applications (2)

Application Number Title Priority Date Filing Date
US00142925A Expired - Lifetime US3733053A (en) 1970-05-14 1971-05-13 Pulley blocks for hoisting
US142986A Expired - Lifetime US3679012A (en) 1970-05-14 1971-05-13 Assembly of block pulleys provided with a load measuring system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US00142925A Expired - Lifetime US3733053A (en) 1970-05-14 1971-05-13 Pulley blocks for hoisting

Country Status (6)

Country Link
US (2) US3733053A (ja)
BE (2) BE766938A (ja)
DE (2) DE2121795C3 (ja)
ES (2) ES391235A1 (ja)
FR (1) FR2096667B1 (ja)
GB (2) GB1322666A (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112750A (en) * 1975-08-12 1978-09-12 Nippon Hoist Co., Ltd. Hook device
US5016026A (en) * 1989-04-28 1991-05-14 Flory John F Load recording rope thimble
US20070240912A1 (en) * 2003-12-02 2007-10-18 Elias Papazissis Bed-Top Scale
US20120045296A1 (en) * 2010-08-18 2012-02-23 Ningbo Baoli United Imp. & Exp. Co., Ltd. Hoist
US10358322B2 (en) * 2016-06-23 2019-07-23 Liebherr-Werk Ehingen Gmbh Load weighing at the lifting hook
US10569997B1 (en) * 2019-05-03 2020-02-25 Ricky Fusillo Lifting device
CN114180481A (zh) * 2022-02-17 2022-03-15 河南工学院 一种卷扬设备的安全保护装置及其在树木移栽上的应用
US11279601B2 (en) * 2017-04-03 2022-03-22 National Oilwell Varco, L.P. Hoisting and tensioning bearing saver

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471347A1 (fr) * 1979-12-10 1981-06-19 Simon Francois Dispositif pour le decrochage de la charge portee par un engin de levage
FR2482572B2 (fr) * 1980-05-13 1986-03-21 Simon Francois Perfectionnements aux supports de poulies de tete de fleche ou analogue d'un engin de levage et/ou de manutention
DE3405759C2 (de) * 1984-02-17 1986-10-16 Willy Habegger AG, Thun Seilflasche
FI71429C (fi) * 1985-06-27 1986-12-19 Tunturipyoerae Oy Momentmaetningsanordning foer en cykelergometer
FR2748265B1 (fr) * 1996-05-03 1998-07-31 Neyrpic Framatome Mecanique Moufle de support et de manutention d'une charge, dispositif de manutention correspondant et son utilisation
AU140436S (en) * 1999-04-14 2000-04-18 Wichard Marine pulley
GB2408810B (en) * 2003-11-25 2007-05-02 Fox Int Group Ltd Weighing scales cover
US7419138B1 (en) 2007-02-23 2008-09-02 Cmc Rescue, Inc. Self-camming pulley
AU2018102234B4 (en) * 2017-02-27 2022-12-15 Maxtrax Australia Pty Ltd An automotive recovery coupler
CA2998214A1 (en) * 2017-05-30 2018-11-30 10284343 Canada Inc. Rigging ring
CN109238773B (zh) * 2018-12-06 2024-05-24 长沙开元仪器有限公司 一种防旋装置及采样系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1236532A (en) * 1915-06-29 1917-08-14 Clement E Beard Hoist-block.
US1795405A (en) * 1929-03-09 1931-03-10 Nash Archibald Frazer Crane, derrick, shear leg, and like lifting device
US2765654A (en) * 1955-03-21 1956-10-09 Cecil B Greer Force indicating apparatus
US3367178A (en) * 1965-04-27 1968-02-06 Tell Sven Axel Device for reading the deflection of a dynamometer

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US525605A (en) * 1894-09-04 Protector for drill-ropes
US1634939A (en) * 1921-09-15 1927-07-05 Oil Well Supply Co Spudding shoe
US1857434A (en) * 1929-09-09 1932-05-10 Elmer K Cole Guy wire anchor device
FR715418A (fr) * 1930-08-21 1931-12-03 Poulie de levage à frein
US2052075A (en) * 1935-08-10 1936-08-25 Lester C Black Traveling block
US2536417A (en) * 1947-05-12 1951-01-02 Lester C Black Traveling sheave block
NL193933A (ja) * 1954-01-12
DE1218683B (de) * 1962-08-02 1966-06-08 Josef Roehrl Flaschenzug
US3250516A (en) * 1964-03-05 1966-05-10 American Chain & Cable Co Hoist bottom block
DE1250993B (de) * 1964-11-10 1967-09-28 Josef Roehrl Flaschenzug
GB1171637A (en) * 1965-11-18 1969-11-26 Bialskie Zaklady Urzadzen Tech Sheave arrangements for Limiting Load Moments of Jib Cranes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1236532A (en) * 1915-06-29 1917-08-14 Clement E Beard Hoist-block.
US1795405A (en) * 1929-03-09 1931-03-10 Nash Archibald Frazer Crane, derrick, shear leg, and like lifting device
US2765654A (en) * 1955-03-21 1956-10-09 Cecil B Greer Force indicating apparatus
US3367178A (en) * 1965-04-27 1968-02-06 Tell Sven Axel Device for reading the deflection of a dynamometer

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4112750A (en) * 1975-08-12 1978-09-12 Nippon Hoist Co., Ltd. Hook device
US5016026A (en) * 1989-04-28 1991-05-14 Flory John F Load recording rope thimble
US20070240912A1 (en) * 2003-12-02 2007-10-18 Elias Papazissis Bed-Top Scale
US20120045296A1 (en) * 2010-08-18 2012-02-23 Ningbo Baoli United Imp. & Exp. Co., Ltd. Hoist
US10358322B2 (en) * 2016-06-23 2019-07-23 Liebherr-Werk Ehingen Gmbh Load weighing at the lifting hook
US11279601B2 (en) * 2017-04-03 2022-03-22 National Oilwell Varco, L.P. Hoisting and tensioning bearing saver
US10569997B1 (en) * 2019-05-03 2020-02-25 Ricky Fusillo Lifting device
US11124397B2 (en) * 2019-05-03 2021-09-21 Ricky Fusillo Fishing pole lifting device with pulley wheels and offset fixation points
CN114180481A (zh) * 2022-02-17 2022-03-15 河南工学院 一种卷扬设备的安全保护装置及其在树木移栽上的应用
CN114180481B (zh) * 2022-02-17 2022-05-17 河南工学院 一种卷扬设备的安全保护装置及其在树木移栽上的应用

Also Published As

Publication number Publication date
DE2121795B2 (de) 1974-02-28
BE766939A (fr) 1971-10-01
GB1322666A (en) 1973-07-11
DE2121795C3 (de) 1974-09-26
DE2121814C3 (de) 1975-09-18
FR2096667B1 (ja) 1973-11-16
DE2121795A1 (de) 1972-01-27
ES391234A1 (es) 1973-07-01
DE2121814B2 (de) 1975-02-06
BE766938A (fr) 1971-10-01
US3733053A (en) 1973-05-15
FR2096667A1 (ja) 1972-02-25
ES391235A1 (es) 1973-07-01
GB1293732A (en) 1972-10-25
DE2121814A1 (de) 1971-11-25

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