EP1927568A2 - Dispositif de levage électrique avec fonctionnalité améliorée - Google Patents

Dispositif de levage électrique avec fonctionnalité améliorée Download PDF

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Publication number
EP1927568A2
EP1927568A2 EP07120884A EP07120884A EP1927568A2 EP 1927568 A2 EP1927568 A2 EP 1927568A2 EP 07120884 A EP07120884 A EP 07120884A EP 07120884 A EP07120884 A EP 07120884A EP 1927568 A2 EP1927568 A2 EP 1927568A2
Authority
EP
European Patent Office
Prior art keywords
electric hoist
hoist
electric
phase
safety
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.)
Granted
Application number
EP07120884A
Other languages
German (de)
English (en)
Other versions
EP1927568A3 (fr
EP1927568B1 (fr
Inventor
Simone Franzan
Alessandro Guzzonato
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.)
Ribimex Italia Srl
Original Assignee
Ribimex Italia Srl
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 Ribimex Italia Srl filed Critical Ribimex Italia Srl
Publication of EP1927568A2 publication Critical patent/EP1927568A2/fr
Publication of EP1927568A3 publication Critical patent/EP1927568A3/fr
Application granted granted Critical
Publication of EP1927568B1 publication Critical patent/EP1927568B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B66D1/28—Other constructional details
    • B66D1/40—Control devices
    • B66D1/42—Control devices non-automatic
    • B66D1/46—Control devices non-automatic electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/18—Control systems or devices
    • B66C13/40—Applications of devices for transmitting control pulses; Applications of remote control devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link

Definitions

  • the present invention relates in general to an electric hoist with an improved functionality.
  • the invention relates to an electric hoist suitable for being used in an extremely simple and reliable manner on the part of a user.
  • Hoists are apparatuses destined for lifting loads or weights, consisting in their most elementary form of two blocks, one fixed, the other mobile, carrying one or more pulleys, on whose throats a cable, applied at one end to the fixed block or to the mobile block, is alternatingly wound.
  • each winch comprises a wheel, called pulley, hinged on a bracket, on whose edge there is a groove in which a rope, cable or chain runs.
  • the axis of the pulley In fixed winches, the axis of the pulley is fixed and the wheel has the sole function of deviating the force applied to an end of the cable, with the other end connected to the load, whereas in mobile winches, the axis of the pulley moves integrally with the load lifted and the end of the cable opposite to the operating end is constrained to a fixed point with respect to the system.
  • a winch system is a combination of two or more winches, partly fixed and partly mobile; the advantage of this system is that there is a force ratio equal to the number of winches present and the same ratio is obtained between the traction speed and the lifting speed.
  • the pulling force is exerted by means of an electric motor, connected, by means of a wire and socket, to the electric power supply and driven by a push-button upwards and downwards (by inverting the rotation direction of the motor) of the hook of the hoist, which is connected, by means of an electric wire, to the motor; for the lifting a steel wire wound onto a spool with a pitch equal to the diameter of the wire, is used.
  • a standard version of an electric hoist is normally equipped with a connection system to brackets having a special design for the hooking of horizontal tubes, below which the machine is fixed, as shown in the schematic drawing of figure 1.
  • the manoeuvering mechanism of each electric hoist also comprises a series of safety devices, which prevent rotations and spontaneous unwinding of the steel wire, under the action of the load, when the driving action is stopped; furthermore, there are no thermal protection devices in the electric motor to prevent a sudden and undesired restarting of the hook.
  • the electric power supply and driving circuit of electric hoists of the traditional type are always particularly complex, mainly due to the fact that it is necessary to connect the electric motor to both a power supply and to the push-button for the upward and downward activation, which can imply the use of electric wires even tens of metres long, in relation to the distances existing.
  • an objective of the present invention is therefore to provide an electric hoist with an improved functionality, which overcomes the above drawbacks, i.e. to provide an electric hoist with an improved functionality which is extremely safe, can be easily installed and activated by the user and at reduced costs, with respect to hoists of the traditional type.
  • Another objective of the present invention is to provide an electric hoist with an improved functionality which allows effective connections to be obtained, with respect to the devices of the traditional type.
  • a further objective of the present invention is to indicate an electric hoist with an improved functionality which is simple and economical to produce, using simple technologies, relatively inexpensive raw materials, but at the same time having the same accessories and emergency devices as electric hoists of the known type.
  • the electric hoist, object of the present invention advantageously mainly comprises a transmitter, suitable for preferably transmitting in frequency modulation and with a codified signal, and a receiver, with digital decoding controlled by a microprocessor, for the remote activation of the upward and downward movement of the hook of the hoist.
  • the receiving apparatus is only activated after recognizing the signal coming from the transmitter, which must then be codified.
  • the system also comprises two safety devices, one active and the other passive, in order to disconnect all the power relays of the receiver, should the operator press the specific emergency push-button, envisaged on the transmitter, or if the receiver does not receive the signal of the transmitter for a pre-established time range (due to the fact that the maximum distance between the transmitter and the receiver has been exceeded or because the power batteries in the transmitter have become flat).
  • 10 generically indicates the driving motor of the electric hoist 25, according to the present invention
  • 11 indicates the hook of the hoist, suitable for the lifting of a load 12
  • 15 indicates a safety stop, suitable for buffering on the fork 16, during the reascent of the steel cable 17 (figure 2, basic version of the hoist)
  • 13 indicates a further winch, equipped with a hook 22, which can be used for lifting greater loads 14, according to the arrangement of the hook 11 illustrated in figure 3 (version of the hoist called "double pull").
  • the same hoist 25 is equipped with a bracket connection 19, which supports the electric motor 10 from below and suitable lifting devices and which is adequately shaped for the hooking, by fixing means 18, of horizontal tubes 20 sustained by vertical supporting structures 21 (figures 1 and 4).
  • the electric hoist 25 is connected to the electric power supply at 230 V and also envisages the use of a driving device 23, equipped with one or two push-buttons 24, suitable for the raising and lowering of the winch 13 and the hook 22 with which the load 14 to be moved is associated.
  • the driving device 23 contains a transmitting device, whereas in correspondence with the electric motor 10 of the hoist 25, on a shaped support 29 of the framework 30, there is a specific casing 26, consisting of two portions 31, 32, in which a receiving apparatus is inserted, so as to provide a radio-controlled activation of the hoist 25 and consequently release the driving device 23 from the structure of the hoist (figures 4-6).
  • said driving device 23 is physically connected to the motor 10 by means of an electric wire having a suitable length and that this wiring can cause drawbacks for the user and jeopardize the correct functioning of the moving organs of the machine.
  • the driving device 23 envisages one or two push-buttons 24 for the up and down activation of the load and a push-button or emergency knob 27 and contains a set of accumulators of 9-12 V for supplying the transmission and codifying circuit with the signal in radiofrequency S, whereas the transmission aerial is inserted in the electronic control card of the transmitting apparatus.
  • the interior of the receiving apparatus houses all the power interfaces for activating the electric motor 10, the condenser 33 of the electric motor 10 and the circuit system, positioned on an electronic control card 34, for receiving and decoding the codes transmitted by the transmitting apparatus of the driving device 23, whereas outside the casing 26, there is an emergency push-button or knob 28, advantageously applied on board the machine; these components are shown in detail in figures 5 and 6 enclosed, which refer to two different types of electric motors 10 used, which differ in relation to the power supplied and consequently to the overall capacity of the hoist 25.
  • the primary objective is to prevent any undesired setting in motion; for this reason, the receiving apparatus can only function after recognizing the signal S transmitted by the transmitting apparatus.
  • the transmission system in radiofrequency comprises two safety devices, of which one is active and the other passive; the active safety device disconnects all the power relays of the receiving apparatus when the emergency press-button 27 on the driving device 23 is intentionally pressed, whereas the passive safety device disconnects all the power relays if the receiving apparatus does not receive the signal of the transmitting apparatus for a time exceeding a certain threshold, which can be set, for example, at 0.5 seconds (as the maximum distance between transmitter and receiving apparatus has been exceeded or due to the exhaustion of the batteries of the transmitting apparatus).
  • a certain threshold which can be set, for example, at 0.5 seconds (as the maximum distance between transmitter and receiving apparatus has been exceeded or due to the exhaustion of the batteries of the transmitting apparatus).
  • a bell or buzzer is inserted in the receiving apparatus, which indicates at constant intervals that the receiving apparatus and transmitting apparatus are in communication with each other and/or, with a different sound, that the batteries of the transmitting apparatus are becoming flat.
  • the transmitting apparatus situated inside the driving device 23, mainly comprises an emergency or protection push-button or knob 27, an electronic control card 35 and a set of charging accumulators 37.
  • a sound signal generator phase with active remote control 42 and a hybrid transmission module 43 suitable for transmitting a codified signal preferably on the carrying frequency of 433.92 MHz, in frequency modulation (mode most immune to disturbances), with a capacity of about 25-30 metres, in relation to the type of obstacles present between the transmitting apparatus and the receiving apparatus.
  • the system functions with continuous carrying frequency and consequently even if the transmitting apparatus is not used (and the up and/or down push-buttons 24 are not pressed), this is constantly in communication with the receiving apparatus situated in the casing 26 connected to the framework 30 of the electric motor 10.
  • the signal transmitted consists of impulse trains with a period which varies in relation to the datum to be transmitted, whereas the string transmitted consists of various synchronism bits, 12 code bits and 5 bits, one for each channel.
  • the doors 44, 45 create an oscillator which is activated with a cadence of a few seconds to indicate that the system is active and charged, in order to prevent the user from leaving the driving device 23 switched on.
  • the safety of the system is guaranteed by the high number of possible combinations for the carrying code (which can be modified by the user) and double interruption created by the emergency knob 27, which acts both on the transmission pin and general feeding of the whole system.
  • the receiving apparatus included in the casing 26 adjacent to the electric motor 10 mainly comprises the electronic control card 34 and the protection knob 28, which are connected to the motor 10.
  • the card 34 is fed by releasing the emergency knob 28 situated on the casing 26 of the receiving apparatus and, as soon as the card 34 is fed, the microprocessor 49 is reset and activates the control and access program of the power interface.
  • the microprocessor 49 keeps the two safety relays 51, inserted in series in the line, disconnected until the decoder phase 46 has received the correct code; furthermore, to prevent the outputs of the microprocessor 49 from remaining blocked by activating two line relays 51, with a consequent reduction on the safety degree of the system, the relays 51 are driven with complementary outputs.
  • the outputs are either all high or low and consequently one of the line relays 51 in any case remains open.
  • an active transmitter and valid transmission signal is sent to the microprocessor 49; these two signals activate the recognition procedure of the transmitting apparatus indicated by the lighting first of a red LED 52 on the card 34 and subsequently, after an interval of about 3 seconds, of a green LED 53 and red LED 52 alternatingly, and then the green LED 53 alone.
  • the recognition procedure is accompanied by a sound signal, activated by the buzzer 54, which passes from alternating to continuous, at the end of the procedure and with recognition effected on the part of the transmitting apparatus.
  • the decoder 46 With each pressing of the push-button or push-buttons 24 on the driving device 23, which allow the down and up movement of the hook 22 of the hoist 25, the decoder 46 identifies the correct code and sends it to the microprocessor 49, which, with a safety margin, first activates the up relays 55 or the down relays 56 and subsequently the two line safety relays 51; in this way, the consumption of the up and down relay contacts 55, 56 is reduced, which, in addition to commuting the windings of the electric motor 10, also exchange the connection for the condenser 33 of the motor 10.
  • the two line relays 51 are opened and subsequently the up 55 or down 56 relay also returns to rest position, depending on the type of command provided.
  • the system enters into safety by deactivating all the outputs and indicating the state with an intermittent acoustic signal.
  • the system remains blocked and it can only be reused after the disturbance has been eliminated or after the transmitting apparatus has reentered the range of action of the receiving apparatus; in this case, the system restarts with the safety procedure indicated above, which verifies for a certain period of time (typically equal to about 6 seconds) that the transmission of the code is correct.
  • any pressing of the safety knob 28 blocks the feeding to the card 34 and the whole system, putting it under safety conditions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control And Safety Of Cranes (AREA)
  • Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
  • Non-Flushing Toilets (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Load-Engaging Elements For Cranes (AREA)
EP07120884A 2006-11-17 2007-11-16 Dispositif de levage électrique avec fonctionnalité améliorée Not-in-force EP1927568B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000336A ITVI20060336A1 (it) 2006-11-17 2006-11-17 Paranco elettrico a funzionalita' migliorata

Publications (3)

Publication Number Publication Date
EP1927568A2 true EP1927568A2 (fr) 2008-06-04
EP1927568A3 EP1927568A3 (fr) 2008-08-13
EP1927568B1 EP1927568B1 (fr) 2011-08-03

Family

ID=39148292

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07120884A Not-in-force EP1927568B1 (fr) 2006-11-17 2007-11-16 Dispositif de levage électrique avec fonctionnalité améliorée

Country Status (3)

Country Link
EP (1) EP1927568B1 (fr)
AT (1) ATE518799T1 (fr)
IT (1) ITVI20060336A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003084A1 (fr) * 2007-06-01 2008-12-17 Angel Iglesias S.A. Émetteur de télécommande
JP2016030667A (ja) * 2014-07-29 2016-03-07 株式会社スリーエッチ 電動ウインチのリミットスイッチ装置
FR3049576A1 (fr) * 2016-03-31 2017-10-06 Francois Xavier Fron Treuil enrouleur stationnaire telecommande pour le decollage d'aeronefs non motorises
CN113816272A (zh) * 2021-09-17 2021-12-21 安徽安久模架科技有限公司 一种带有自动控制系统的电动提升机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU204486U1 (ru) * 2020-06-30 2021-05-26 Общество С Ограниченной Ответственностью "Спк-Стык" Таль аккумуляторная взрывозащищённая радиоуправляемая

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136418A1 (fr) * 2000-03-13 2001-09-26 Atecs Mannesmann AG Dispositif de commande à distance d'un appareil de levage
US20050253125A1 (en) * 2004-04-27 2005-11-17 National-Oilwell, L.P. Electric winch
US6995682B1 (en) * 2000-10-30 2006-02-07 Ramsey Winch Company Wireless remote control for a winch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1136418A1 (fr) * 2000-03-13 2001-09-26 Atecs Mannesmann AG Dispositif de commande à distance d'un appareil de levage
US6995682B1 (en) * 2000-10-30 2006-02-07 Ramsey Winch Company Wireless remote control for a winch
US20050253125A1 (en) * 2004-04-27 2005-11-17 National-Oilwell, L.P. Electric winch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003084A1 (fr) * 2007-06-01 2008-12-17 Angel Iglesias S.A. Émetteur de télécommande
JP2016030667A (ja) * 2014-07-29 2016-03-07 株式会社スリーエッチ 電動ウインチのリミットスイッチ装置
FR3049576A1 (fr) * 2016-03-31 2017-10-06 Francois Xavier Fron Treuil enrouleur stationnaire telecommande pour le decollage d'aeronefs non motorises
CN113816272A (zh) * 2021-09-17 2021-12-21 安徽安久模架科技有限公司 一种带有自动控制系统的电动提升机
CN113816272B (zh) * 2021-09-17 2023-11-03 安徽安久模架科技有限公司 一种带有自动控制系统的电动提升机

Also Published As

Publication number Publication date
ATE518799T1 (de) 2011-08-15
ITVI20060336A1 (it) 2008-05-18
EP1927568A3 (fr) 2008-08-13
EP1927568B1 (fr) 2011-08-03

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