IT1278716B1 - Safety appts. for lifting unit in e.g building industry - has switch button which stops motor upon contact by lever rotated when rope is blocked by appendix responsive to incorrect winding - Google Patents

Safety appts. for lifting unit in e.g building industry - has switch button which stops motor upon contact by lever rotated when rope is blocked by appendix responsive to incorrect winding

Info

Publication number
IT1278716B1
IT1278716B1 ITFI950150A IT1278716B1 IT 1278716 B1 IT1278716 B1 IT 1278716B1 IT FI950150 A ITFI950150 A IT FI950150A IT 1278716 B1 IT1278716 B1 IT 1278716B1
Authority
IT
Italy
Prior art keywords
rope
appts
drum
safety
switch button
Prior art date
Application number
Other languages
Italian (it)
Inventor
Gaetano Leoni
Original Assignee
Imer Int Spa
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 Imer Int Spa filed Critical Imer Int Spa
Priority to ITFI950150 priority Critical patent/IT1278716B1/en
Publication of ITFI950150A0 publication Critical patent/ITFI950150A0/en
Priority to GB9603523A priority patent/GB2298839B/en
Priority to FR9603099A priority patent/FR2731688A3/en
Priority to DE29604801U priority patent/DE29604801U1/en
Priority to ES9600664U priority patent/ES1034120Y/en
Publication of ITFI950150A1 publication Critical patent/ITFI950150A1/en
Application granted granted Critical
Publication of IT1278716B1 publication Critical patent/IT1278716B1/en

Links

Landscapes

  • Control And Safety Of Cranes (AREA)
  • Emergency Lowering Means (AREA)
  • Invalid Beds And Related Equipment (AREA)

Abstract

The safety appts. is used with lifting units having an electrical motor (MO) to which a drum (1) is connected. The drum has a skirt (2) on which a pull rope (3) is spirally wound. The appts. has a detector to determine the position of the rope in operating conditions and detect shifting, if any, of the rope to an anomalous condition. A device is placed below the skirt and connected to an electric circuit to deactivate the motor. The circuit is 'on' when the rope vertical length, reeling off of the drum, sets itself on the side opposite to the vertical axial pan (b-b) of the drum. The device includes a lever (4) having horizontal rotation axis (z) and being provided with a slotted hole (41) through which the rope (3) is made to pass. A 'V' shaped appendix (42) makes-up a flaring and locking element for the rope when its position changes w.r.t the plane b-b by winding over the skirt in an abnormal direction, so as to cause the rotation of the lever about the pivot axis. A consequent pressure is applied on a switch button (5) connected to the electrical circuit for the motor supply and control.
ITFI950150 1995-03-14 1995-06-29 Safety appts. for lifting unit in e.g building industry - has switch button which stops motor upon contact by lever rotated when rope is blocked by appendix responsive to incorrect winding IT1278716B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ITFI950150 IT1278716B1 (en) 1995-06-29 1995-06-29 Safety appts. for lifting unit in e.g building industry - has switch button which stops motor upon contact by lever rotated when rope is blocked by appendix responsive to incorrect winding
GB9603523A GB2298839B (en) 1995-03-14 1996-02-20 Safety apparatus for electrically-operated lifting apparatus
FR9603099A FR2731688A3 (en) 1995-03-14 1996-03-12 SAFETY DEVICE FOR ELECTRICALLY CONTROLLED LIFTING APPARATUS
DE29604801U DE29604801U1 (en) 1995-03-14 1996-03-12 Safety device for lifting devices with electrical control
ES9600664U ES1034120Y (en) 1995-03-14 1996-03-13 SAFETY DEVICE FOR ELECTRICALLY OPERATING DEVICES, ESPECIALLY FOR CONSTRUCTION.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITFI950150 IT1278716B1 (en) 1995-06-29 1995-06-29 Safety appts. for lifting unit in e.g building industry - has switch button which stops motor upon contact by lever rotated when rope is blocked by appendix responsive to incorrect winding

Publications (3)

Publication Number Publication Date
ITFI950150A0 ITFI950150A0 (en) 1995-06-29
ITFI950150A1 ITFI950150A1 (en) 1996-12-29
IT1278716B1 true IT1278716B1 (en) 1997-11-27

Family

ID=11351332

Family Applications (1)

Application Number Title Priority Date Filing Date
ITFI950150 IT1278716B1 (en) 1995-03-14 1995-06-29 Safety appts. for lifting unit in e.g building industry - has switch button which stops motor upon contact by lever rotated when rope is blocked by appendix responsive to incorrect winding

Country Status (1)

Country Link
IT (1) IT1278716B1 (en)

Also Published As

Publication number Publication date
ITFI950150A1 (en) 1996-12-29
ITFI950150A0 (en) 1995-06-29

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19980626