WO2016109593A1 - Dispositif de sécurité de poulie - Google Patents

Dispositif de sécurité de poulie Download PDF

Info

Publication number
WO2016109593A1
WO2016109593A1 PCT/US2015/067948 US2015067948W WO2016109593A1 WO 2016109593 A1 WO2016109593 A1 WO 2016109593A1 US 2015067948 W US2015067948 W US 2015067948W WO 2016109593 A1 WO2016109593 A1 WO 2016109593A1
Authority
WO
WIPO (PCT)
Prior art keywords
sheave
line
blocking member
safety apparatus
aperture
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.)
Ceased
Application number
PCT/US2015/067948
Other languages
English (en)
Inventor
Joyce Terry CARTER
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 WO2016109593A1 publication Critical patent/WO2016109593A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B66D3/04—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

Definitions

  • the present invention relates to safety apparatus for use with sheaves and pulleys which are also referred to as "snatch blocks.” More particularly, the present invention relates to a safety apparatus that prevents hands and fingers from entering into an area adjacent to the snatch block. The present invention also relates to a safety apparatus for use with snatch blocks that have a pair of housings that are pivotally mounted through which a line is threaded.
  • Snatch blocks are used in a wide variety of industries and applications. Sometimes, snatch blocks are suspended from an overhead position to facilitate the ability to lift an object from one location to another. Other times, operators position snatch blocks in a horizontal orientation relative to the floor to position an object on the floor. Operators use snatch blocks by pulling on the line that is threaded through the snatch block housings. The use of the pulleys and sheaves facilitates the ability, by way of mechanical advantage, to direct an object to another location. Typically, operators will wear gloves while manipulating the line that extends over the pulley.
  • sheave can refer to a block, a pulley snatch block or combinations thereof.
  • the terms “pulley” and “sheave” and “snatch block” are used interchangeably herein.
  • line can refer to ropes, wire ropes, cords, cables and belts.
  • the present invention is a safety apparatus that comprises a sheave having a surface extending circumferentially there around.
  • the sheave resides in, and is supported by, a housing.
  • the sheave has an axis of rotation and rotates within the housing.
  • An axle extends through this axis of rotation of the sheave.
  • a line extends over the surface of the sheave. This line has a first portion extending through an interior of the housing through a first opening at a first side and outwardly through the housing through a second opening at a second side. The first and second openings are sized sufficiently to let the line pass there through.
  • At least one blocking member is suspended from the housing.
  • the blocking member is adjustably suspended, as by a rope or chain, such that the distance of the blocking member from the housing can be changed.
  • the blocking member is substantially spherical.
  • An aperture, or bore extends through the center of the blocking member.
  • the aperture, or bore is sized sufficiently to let the line pass there through.
  • the blocking member has a diameter greater than that of the first or second opening in the housing.
  • the blocking is not spherical.
  • the shape of the blocking member need only be such that it can engage the housing while letting the line to continue to pass there through while simultaneously preventing the hand of a user from contacting the sheave and/or the housing.
  • the invention prevents the hand a user from becoming trapped between the line and the sheave. Additionally, the invention prevents the hand a user from becoming trapped between the line and the housing in which the sheave may rotate.
  • FIG. 1 is a front view of an illustrative embodiment of the invention wherein the blocking member is disengaged from the pulley/sheave;
  • FIG. 2 is a front view of an illustrative embodiment of the invention wherein the blocking member is engaged with the pulley/sheave;
  • FIG. 3 is a side view of an illustrative embodiment of the invention wherein the blocking member is engaged with the pulley/sheave;
  • FIG. 4 is a perspective view of the blocking member of an illustrative embodiment of the invention.
  • the safety apparatus 10 is operative in conjunction with a sheave 20 supported by a housing 22 which defines an opening 26 (see FIG. 3).
  • sheave 20 is rotatable about an axis of rotation defined by axel 24.
  • Line 30 extends through opening 24 of the housing 22 and over and around the upper surface of sheave 20.
  • Line 30 is illustrated as having a first end (30a) which is manipulated by a user and a second end (30b) which is usually attached to a load under normal operation.
  • the term "line” (30) can include a variety of structures such as rope, wire rope, cords, cables, belts, and the like.
  • blocking member 40 Attached to first end 30a of line 30 is a blocking member 40 of safety device 10.
  • blocking member 40 has a substantially spherical body.
  • a central aperture 42 or bore extends through the spherical body and receives first end 30a of line 30.
  • the spherical body can be of a unitary construction wherein first end 30a of line 30 is fed through the central aperture 42 which is formed by boring through one axis of the spherical body.
  • the blocking member is constructed of two halves which are connected to form the spherical body with the first end 30a of line 30 within central aperture 42.
  • the halves of the spherical body can be secured together by pins (46), hinges or other fasteners that can be inserted or removed to allow a user to attach and remove the safety device to a line that is attached to a load at the second end.
  • the central aperture 42 of blocking member 40 is sized to allow first end 30a of line 30 to pass there through with minimal engagement.
  • the position of blocking member 40 remains relatively stable as line 30 passes over sheave 20 in either direction. It is preferable in this embodiment to secure blocking member 40 to sheave 20 through a tether (41) secured to the blocking member 40 at one end (for example to the pins 46 as shown in FIGS. 1-3) and to housing 22 at the other end.
  • the central aperture 42 of blocking member 40 is sized to secure first end 30a of line 30 therein such that blocking member 40 travels with the movement of first end 30a of line 30.
  • a pulling force can be applied to either the first portion 30a or the second portion 30b of the line 30.
  • the pulling force that is applied to one of the portions 30a and 30b of the line 30 will cause the other portion to be drawn inwardly over and around the sheave 20 located within the housing 22. If the user is guiding the first portion 30a when a pulling force is applied to the second end 30b, the entry of the user's hands into the areas at the sheave 20 is prevented by the engagement of the blocking member 40 with sheave 20 or housing 22 (see FIGS. 2 and 3) As such, any injury to the hand of the user is effectively prevented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Lowering Means (AREA)

Abstract

L'invention concerne un dispositif de sécurité qui s'utilise en combinaison avec un réa qui présente une surface rotative et un cordage s'étendant de manière périphérique autour de celui-ci. Le dispositif de sécurité peut comprendre un élément de blocage sensiblement sphérique ayant une ouverture dimensionnée pour recevoir le cordage sur un premier côté du réa ; une amarre reliant l'élément de blocage au réa. L'élément de blocage peut venir en prise avec le réa lorsqu'une force de traction est exercée sur un second côté du réa et qu'un utilisateur tient le cordage sur le premier côté du réa avec l'élément de blocage entre eux.
PCT/US2015/067948 2014-12-31 2015-12-29 Dispositif de sécurité de poulie Ceased WO2016109593A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201414587511A 2014-12-31 2014-12-31
US14/587,511 2014-12-31

Publications (1)

Publication Number Publication Date
WO2016109593A1 true WO2016109593A1 (fr) 2016-07-07

Family

ID=56285013

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/067948 Ceased WO2016109593A1 (fr) 2014-12-31 2015-12-29 Dispositif de sécurité de poulie

Country Status (1)

Country Link
WO (1) WO2016109593A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018138482A (ja) * 2017-02-24 2018-09-06 株式会社Ｔｌｃ 滑車用巻込み防止具

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1975940A (en) * 1932-06-17 1934-10-09 John A Harding Safety pulley
US4480818A (en) * 1982-09-02 1984-11-06 Schlumberger Technology Corporation Safety enhancement device for well-logging cable sheave wheels
US4770394A (en) * 1985-11-21 1988-09-13 Yang Tai Her Pulley hoists
US5636460A (en) * 1995-09-18 1997-06-10 Harnischfeger Corporation Dragline with cantilevered side-access dump block
US20080067482A1 (en) * 2006-09-14 2008-03-20 Wireline Technologies, Inc. Ring sheave

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1975940A (en) * 1932-06-17 1934-10-09 John A Harding Safety pulley
US4480818A (en) * 1982-09-02 1984-11-06 Schlumberger Technology Corporation Safety enhancement device for well-logging cable sheave wheels
US4770394A (en) * 1985-11-21 1988-09-13 Yang Tai Her Pulley hoists
US5636460A (en) * 1995-09-18 1997-06-10 Harnischfeger Corporation Dragline with cantilevered side-access dump block
US20080067482A1 (en) * 2006-09-14 2008-03-20 Wireline Technologies, Inc. Ring sheave

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018138482A (ja) * 2017-02-24 2018-09-06 株式会社Ｔｌｃ 滑車用巻込み防止具

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