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 windingInfo
- 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
Links
- 238000004804 winding Methods 0.000 title abstract 2
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000002547 anomalous effect Effects 0.000 abstract 1
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.
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) |
-
1995
- 1995-06-29 IT ITFI950150 patent/IT1278716B1/en active IP Right Grant
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 |