DK174767B1 - Lifting device for hoisting device and hoisting device provided with such device - Google Patents

Lifting device for hoisting device and hoisting device provided with such device Download PDF

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Publication number
DK174767B1
DK174767B1 DK200100673A DKPA200100673A DK174767B1 DK 174767 B1 DK174767 B1 DK 174767B1 DK 200100673 A DK200100673 A DK 200100673A DK PA200100673 A DKPA200100673 A DK PA200100673A DK 174767 B1 DK174767 B1 DK 174767B1
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DK
Denmark
Prior art keywords
strap
chamber
bracket
block
ceiling
Prior art date
Application number
DK200100673A
Other languages
Danish (da)
Inventor
Ole Boegh-Soerensen
Original Assignee
Guldmann V As
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 Guldmann V As filed Critical Guldmann V As
Priority to DK200100673A priority Critical patent/DK174767B1/en
Priority to DE10219351.7A priority patent/DE10219351B4/en
Publication of DK200100673A publication Critical patent/DK200100673A/en
Application granted granted Critical
Publication of DK174767B1 publication Critical patent/DK174767B1/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54Safety gear
    • B66D1/58Safety gear responsive to excess of load
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2200/00Information related to the kind of patient or his position
    • A61G2200/30Specific positions of the patient
    • A61G2200/34Specific positions of the patient sitting
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/10Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/1013Lifting of patients by
    • A61G7/1015Cables, chains or cords
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/10Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/104Devices carried or supported by
    • A61G7/1042Rail systems
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/10Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/1049Attachment, suspending or supporting means for patients
    • A61G7/1051Flexible harnesses or slings
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/10Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/1049Attachment, suspending or supporting means for patients
    • A61G7/1061Yokes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61GTRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G7/00Beds specially adapted for nursing; Devices for lifting patients or disabled persons
    • A61G7/10Devices for lifting patients or disabled persons, e.g. special adaptations of hoists thereto
    • A61G7/1063Safety means

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control And Safety Of Cranes (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Invalid Beds And Related Equipment (AREA)

Description

i DK 174767 B1in DK 174767 B1

Den foreliggende opfindelse angår en overbelastningsindretning for et hejseapparat, fortrinsvis en personhejs, hvor en strop oprulles i et hus gennem en fjederbelastet stropføring, der er indrettet for at kunne påvirke en kontakt for at afbryde strømmen til hejseapparatets motor når enden af stroppen rammer stropføringen og overvinder 5 kraften fra fjederen. Opfindelsen angår endvidere et hejseapparat til montering i loftskinner for håndtering og transport af personer, som befinder sig i en løftesele, der er ophængt i stroppen.BACKGROUND OF THE INVENTION The present invention relates to an overload device for a hoisting apparatus, preferably a hoist, wherein a strap is wound into a housing through a spring-loaded strap guide adapted to actuate a contact to interrupt the current of the hoisting motor when the end of the strap hits the strap guide and overcomes. 5 the power of the spring. The invention further relates to a hoist for mounting in ceiling rails for handling and transporting persons who are in a lifting belt suspended in the strap.

Der kendes hejseapparater af den ovennævnte type, som monteres i skinner på eller 10 under et loft. Apparaterne anvendes især på hospitaler eller plejehjemsafdelinger, hvor bevægelseshæmmede personer i forbindelse med daglig pleje kræver løfteudstyr.Hoists of the above type are known, which are mounted in rails on or under a ceiling. The devices are especially used in hospitals or nursing homes where people with reduced mobility in connection with daily care require lifting equipment.

Dette vil normalt omfatte et eller flere hejseapparater, der er ophængt i skinnebaner, der forløber mellem senge, stole, sanitære installationer så som bad og toilet mv.This will usually include one or more hoists which are suspended in railways running between beds, chairs, sanitary facilities such as bath and toilet, etc.

15 I sådanne systemer kan skinnebaneme være tilvejebragt uden passage gennem mure ved døre. I denne situation vil det ofte være nødvendigt at overføre personen fra et hejseapparat på et skinnesegment til et andet hejseapparat på et andet skinnesegment.In such systems, the railings may be provided without passage through walls at doors. In this situation, it will often be necessary to transfer the person from one hoisting device on one rail segment to another hoisting device on another rail segment.

Der kan ligeledes være behov for at overføre personen fra et hejseapparat på et skinnesegment til og fra et fastmonteret hejseapparat. I sådanne situationer, hvor personen 20 ikke løftes i et lige eller et lodret løft, er der risiko for ubehag for patienten, der kan bringes i svingende bevægelse, ligesom der er risiko for overbelastning af hejseappara-teme.There may also be a need to transfer the person from a hoisting device on a rail segment to and from a fixed hoisting device. In such situations where the person 20 is not lifted in a straight or a vertical lift, there is a risk of discomfort to the patient which can be swung, as is the risk of overloading the hoisting devices.

Overbelastning kan også forekomme, når hejseapparatet løfter en løftesele op imod et 25 chassis eller et kabinet for selve hejseapparatet. I denne situation er det kendt at anvende en ^ederbelastet stropføring, som har en åbning, der netop modtager stroppen.Overloading can also occur when the hoist lifts a lifting harness up against a chassis or housing for the hoist itself. In this situation, it is known to use an abrasive strap guide which has an aperture that just receives the strap.

Når en fortykkelse på stroppen rammer stropføringen, vil denne være indrettet for at svinge i indgreb med en kontakt, som afbryder strømmen til en motor i hejseapparatet.When a thickening on the strap hits the strap guide, it will be arranged to pivot into engagement with a switch that cuts off the current to a motor in the hoisting apparatus.

Herved stoppes den spole, hvorpå stroppen opvikles. Imidlertid vil den kendte indret-30 ning kun virke som overbelastningsindretning ved et lodret træk og kan ikke fungere som pålidelig sikring mod overbelastning ved meget skæve løft.This stops the coil on which the strap is wound. However, the known device will only act as an overload device in a vertical pull and cannot act as a reliable overload protection with very uneven lifting.

DK 174767 B1 2DK 174767 B1 2

Det er formålet med den foreliggende opfindelse at anvise en overbelastningsindretning af den indledningsvis nævnte type, hvor denne ulempe er afhjulpet, idet indretningen ikke alene afbryder strømmen til hejseapparatets motor ved et direkte træk, men også kan afbryde strømmen, når der optræder et skævt træk ud over en defineret 5 vinkel i forhold til lodret i hejseapparatets strop uafhængigt af belastningen i stroppen.It is the object of the present invention to provide an overload device of the type mentioned in the beginning, where this disadvantage is remedied, in that the device not only interrupts the current to the hoisting motor by a direct pull, but can also cut off the current when an oblique pull occurs above a defined angle to the vertical of the hoisting strap, independent of the load in the strap.

Dette opnås ifølge den foreliggende opfindelse med en overbelastningsindretning, som er særpræget ved, at stropføringen omfatter en klods, der er forsynet med en åbning for stroppen, og som er flydende lejret i et kammer idet klodsen af fjederen presses i 10 anlæg mod kammerets bund idet der er en givet afstand mellem klodsen overside og loftet i kammeret, at klodsen er forbundet med et aftastningsorgan, der befinder sig udenfor kammeret, og som har en flade for anlæg mod kontaktens afbryder idet afstanden imellem anlægsfladen og afbryderen svarer til afstanden mellem klodsens overside og kammerets loft. Hejseapparatet ifølge opfindelsen er særpræget ved at 15 være forsynet med en sådan indretning.This is achieved in accordance with the present invention with an overload device, which is characterized in that the strap guide comprises a block provided with an opening for the strap and which is fluidly mounted in a chamber, the block of the spring being pressed into abutment against the bottom of the chamber. there is a given distance between the top surface of the block and the ceiling of the chamber, that the block is connected to a sensing means located outside the chamber and having a surface for abutment against the contact switch, the distance between the contact surface and the switch corresponding to the distance between the top side of the block and chamber ceiling. The hoisting apparatus according to the invention is characterized by being provided with such a device.

Idet klodsen er flydende lejret i kammeret, vil den, når der kommer et skævt træk, kunne svinges eller vippes opefter indeni kammeret. Ved at dimensionere klodsen og kammeret på passende vis i forhold til den tilsvarende udformning og indbyrdes pla-20 cering af aftastningsorgan og kontakten, er det muligt at påvirke kontakten, når et skævt træk i klodsen overvinder fj ederkraften og svinger klodsen, som derved forskyder aftastningsorganet for aktivering af kontaktens afbryder. Når klodsen udsættes for en så skæv belastning, at den trækkes i anlæg mod kammerets loft, vil aftastningsor-ganets anlægsflade kunne aktivere afbryderen. Med en sådan konstruktion tillades et 25 skævt træk indenfor visse rammer, idet kontaktens afbryder ikke aktiveres, når blot klodsen har foretaget en delvis svingning eller en delvis bevægelse indeni kammeret.As the bricks are fluidly enclosed in the chamber, when an oblique pull occurs, it can be swiveled or tilted upwardly within the chamber. By dimensioning the bracket and chamber appropriately in relation to the corresponding design and positioning of the sensing means and the contact, it is possible to actuate the contact when a skewed pull in the bracket overcomes the spring force and pivots the clamp, thereby displacing the sensing means. for activating the switch's switch. When the block is subjected to such a skewed load that it is pulled into contact with the ceiling of the chamber, the touch surface of the sensing device will be able to activate the switch. With such a construction, a skewed feature is allowed within certain frames, since the switch's switch is not actuated unless the bracket has made a partial oscillation or a partial movement within the chamber.

Ved passende fysisk dimensionering af klodsen, kammeret, fjederen og passende materialevalg, som definerer friktion, er det muligt at tilvejebringe en overbelastningsindretning, som aktiveres ved en ønsket vinkel.By appropriate physical sizing of the block, chamber, spring and appropriate material selection defining friction, it is possible to provide an overload device which is activated at a desired angle.

30 3 DK 174767 B130 3 DK 174767 B1

Kammeret kan være tilvejebragt i en separat bøjle, der er monteret i tilknytning til hejseapparatet, men det foretrækkes, at kammeret er dannet i en del af chassisrammen for hejseapparatet, idet der herved opnås en mere stiv konstruktion.The chamber may be provided in a separate bracket mounted adjacent to the hoisting apparatus, but it is preferred that the chamber be formed in a portion of the chassis frame of the hoisting apparatus thereby providing a more rigid construction.

5 Det er muligt at anvende stropper, som er båndformede. Med henblik herpå kan indretningen ifølge en udførelsesform være særpræget ved, at klodsen fortrinsvis er rektangulær og har en slids for stroppens passage, at klodsen ved modsatte sider har en forlængelse, der strækker sig ud gennem spalter i kammeret, og som ved sin overside har et punkt til anlæg mod aftastningsorganet, der er tilvejebragt i form af en U-formet 10 aftastningsarm med en gren på hver side af kammeret, og som er svingbart lejret ved U-ets bund, og som har anlægsfladen tilvejebragt på enden af den ene arm, som er placeret i umiddelbar nærhed af afbryderen. Denne udførelsesform er egnet til brug med båndformet strop og i almindelige skinnesystemer, hvor efterfølgende skinnesegmenter almindeligvis vil være placeret direkte i forlængelse af hinanden, således at 15 klodsen blot behøver at kunne vippe i retning langs skinnens udstrækning eller på tværs af denne.5 It is possible to use strap-shaped straps. To this end, the device according to one embodiment may be characterized in that the bracket is preferably rectangular and has a slot for the passage of the strap, that the bracket has at opposite sides an extension extending through slots in the chamber and which at its upper side has a a point for abutment against the sensing means provided in the form of a U-shaped sensing arm with a branch on each side of the chamber, which is pivotally mounted at the bottom of the U and having the abutment surface provided at the end of one arm, which is located in the immediate vicinity of the switch. This embodiment is suitable for use with band-shaped strap and in ordinary rail systems, where subsequent rail segments will generally be located directly in succession so that the block only needs to be able to tilt in direction along or across the rail.

Ifølge en anden udførelsesform, der er egnet til stropper, som er runde, er indretningen særpræget ved, at klodsen fortrinsvis er cirkulær og har en cirkulær åbning for strop-20 pens passage, at klodsen ved sin overside er i anlæg mod en cylinder, der strækker sig gennem en central boring i oversiden af kammeret, hvilken cylinder har anlægsfladen tilvejebragt på sin opefter vendende ende, som er placeret i umiddelbar nærhed af afbryderen. Denne er anvendelig sammen med runde stropper, hvorved det bliver muligt at opnå en afbrydelse under en hvilken som helst orientering af den skrå vinkel. Dette 25 vil dog sjældent være nødvendigt i skinnemonteret hejseapparater.According to another embodiment suitable for round straps, the device is characterized in that the bracket is preferably circular and has a circular opening for the passage of the strap, that the bracket at its upper side abuts against a cylinder which extending through a central bore in the upper side of the chamber, the cylinder having the abutment surface provided at its upwardly facing end which is located in the immediate vicinity of the switch. This is useful in conjunction with round straps, which makes it possible to obtain an interruption during any orientation of the inclined angle. However, this will rarely be necessary in rail mounted hoists.

Det foretrækkes, at indretningen er indrettet således, at kammeret og klodsen er udformet med indbyrdes størrelse således at klodsen kan vippes inden i kammeret når der udøves et skævt træk i stroppen, således at den ende side hvorfra trækkes udøves 30 svinges op i anlæg mod kammerets loft. Friktion mellem stropføring og strop vil fortrinsvis være valgt, således at fjederkraften overvindes ved en grænsevinkel, der er 4 DK 174767 B1 større end 40° i forhold til lodret, og at klodsen således først trækkes i anlæg mod kammerets loft, når denne vinkel overstiges.It is preferred that the device be arranged such that the chamber and the bracket are mutually shaped so that the bracket can be tilted within the chamber when an oblique pull is exerted in the strap so that the end side from which the pull is exerted pivots into abutment against the chamber. ceiling. Preferably, friction between strap guide and strap will be selected so that the spring force is overcome at a boundary angle greater than 40 ° to the vertical and so that the bracket is first pulled into contact with the ceiling of the chamber when this angle is exceeded.

Således vil et skråt træk under grænsevinklen kun betyde en vis forskydning af aftast-5 ningsorganet. Ved en sådan forskydning sker der ikke et afbrydning af strømtilførslen til motoren. Imidlertid kan denne delvise vandring af aftastningsorganet benyttes til at påvirke en yderligere kontakt, således at motoren omstyres eller strømforsynes for langsommere drift. Alternativt kan der gives en advarsel ved en lyd eller lysgiver, således at brugeren af hejseapparatet får en advarsel inden en total deaktivering af moto-10 ren.Thus, an oblique drag below the boundary angle will mean only some displacement of the sensing means. In such an offset, the power supply to the motor does not interrupt. However, this partial travel of the sensing means can be used to influence a further contact so that the motor is redirected or powered for slower operation. Alternatively, a warning can be given by a sound or light emitter so that the user of the hoist receives a warning before a complete deactivation of the motor.

Idet der foretages en dimensionering af fjederkraften i forhold til friktion mellem stroppen og klodsen, foretrækkes det, at klodsen er fremstillet med en skråt nedefter tilspidset åbning for stroppens passage, således at stroppen ikke er i anlæg med åbnin-15 gens sidekanter ved klodsens vipning. Således vil der ikke ved klodsens vipning optræde en større kontaktflade og dermed risiko for en afbrydelse af strømstyrken ved et løft under en skrå vinkel, som er acceptabel. Med en tilspidsende passageåbning vil friktionen således være veldefineret ved indgrebet mellem stroppen og passageåbningens kantområde.By dimensioning the spring force relative to friction between the strap and the bracket, it is preferred that the bracket is made with a slanted downwardly tapered opening for the strap passage so that the strap does not abut with the lateral edges of the opening at the bracket tilt. Thus, at the tilt of the globe, a larger contact surface will not occur and thus the risk of interrupting the current at a lift at an inclined angle which is acceptable. Thus, with a tapered passage opening, the friction will be well defined by the engagement between the strap and the edge area of the passage opening.

2020

Opfindelsen vil herefter blive forklaret nærmere under henvisning til den medfølgende tegning, hvor fig. 1 viser en udførelsesform for et hejseapparat monteret i loftskinner for 25 understøtning af en løftesele, fig. 2 viser et fragmentarisk perspektivisk billede af et hejseapparat med en kendt overbelastningsindretning, fig. 3-15 viser forskellige belastningssituationer for en første udførelsesform for overbelastningsindretningen beregnet til at samvirke med en 30 båndformet strop, og fig. 16-19 viser forskellige belastningssituationer for en anden udførelsesform for overbelastningsindretningen, beregnet til at samvirke med en 5 DK 174767 B1 rund strop.The invention will then be explained in more detail with reference to the accompanying drawing, in which fig. 1 shows an embodiment of a hoist mounted in ceiling rails for supporting a lifting belt; FIG. 2 is a fragmentary perspective view of a hoist with a known overload device; FIG. Figures 3-15 show various loading situations for a first embodiment of the overload device intended to cooperate with a band-shaped strap, and Figs. 16-19 illustrate different loading situations for another embodiment of the overload device intended to cooperate with a 5 DK 174767 B1 round strap.

I det efterfølgende vil identiske eller tilsvarende elementer betegnes med samme henvisningsbetegnelser og der gives derfor ikke en specifik forklaring i forbindelse med 5 hver enkelt af tegningens figurer.In the following, identical or similar elements will be denoted by the same reference numerals and therefore no specific explanation will be given in connection with each of the drawings.

Fig. 1 viser et hejseapparat 1, som via hjul 2 er monteret i et skinnesystem 3. En strop 4 er indrettet for at kunne føres op og ned ifølge pilen 5, hvorved en løftesele 6 (illustreret uden person), der er ophængt i et løfteåg 7, kan benyttes til at løfte og 10 transportere en person. I den viste udformning er der illustreret en kendt overbelastningssikring i form af en bøjle 8, der fungerer som endestop, og som aktiverer en afbryder for at stoppe motoren, når en ombukket del 9 på stroppen 4 kommer i indgreb med bøjlen 8. Hejseapparatet betjenes med en håndbetjening 10.FIG. 1 shows a hoisting device 1 mounted via wheels 2 in a rail system 3. A strap 4 is arranged to be moved up and down according to the arrow 5, whereby a lifting belt 6 (illustrated without person) suspended in a lifting yoke 7 , can be used to lift and transport a person. In the embodiment shown, a prior art overload protection is illustrated in the form of a stop 8, which acts as an end stop and activates a switch to stop the motor when a folded part 9 of the strap 4 engages the hanger 8. The hoist is operated with a hand control 10.

15 Fig. 2 viser detaljer ved udformning af det kendte hejseapparat 1.1 fig. 2 ses, at stroppen 4 vikles op på en spole 11, som drives af en motor 17. Motoren 17 kan være forsynet med strøm fra akkumulator eller fra ledningsnettet. Stroppen 4 føres gennem en åbning 12 i en stropføring 13, der er belastet nedefter med anvendelse af en fjeder (ikke vist). Når stroppen løftes op, således at den ombukkede del 9 kommer i anlæg 20 mod åbningen 12, vil stropføringen svinges omkring en aksel 14 imod virkningen fra fjederen og derved påvirke en afbryder 15 på en kontakt 16, således at strømti Iførsien til motoren 17 afbrydes. 1 fig. 3-15 er der illustreret en båndformet strop. Endvidere illustreres en stropføring 25 18, som omfatter en U-formet aftastningsarm 19, der er monteret svingbart om U-ets bund 20. Aftastningsarmen omfatter en første gren 21, som ved sin ende fjernt fra U-ets bund har en anlægsflade 22 i umiddelbar nærhed af afbryderen 15. Aftastningsarmen omfatter en anden gren 23. De to grene befinder sig på hver side af et kammer 24, der er dannet i et chassis 25 for hejseapparatet, og som indeholder en klods 26, der er 30 flydende monteret i kammeret 24 og som er presset nedefter ved virkningen fra to fjedre 27, idet de er anbragt ved hver side af klodsen 26. Klodsen 26 har ved hver side en forlængelse 28, der strækker sig ud gennem spalter eller sideåbninger 29 i kamme- 6 DK 174767 B1 ret 24. Hver af forlængelserne 28 har ved sin overside anlægspunkter 30, der er til anlæg mod et punkt 31 ved aftastningsarmens to grene 21,23.FIG. 2 shows details of the design of the known hoisting apparatus 1.1 fig. 2 it is seen that the strap 4 is wound on a coil 11 driven by a motor 17. The motor 17 may be provided with power from the accumulator or from the wiring harness. The strap 4 is passed through an opening 12 in a strap guide 13 loaded downwards using a spring (not shown). When the strap is lifted so that the folded portion 9 engages abutment 20 against the opening 12, the strap guide will be pivoted about a shaft 14 against the action of the spring and thereby actuate a switch 15 on a contact 16, thus interrupting the supply to the motor 17. 1 FIG. 3-15, a band-shaped strap is illustrated. Further illustrated is a strap guide 25 18 comprising a U-shaped sensing arm 19 pivotally mounted about the bottom of the U-side 20. The scanning arm comprises a first branch 21 which at its end distant from the bottom of the U-side has a abutment surface 22 in the immediate proximity of the switch 15. The sensing arm comprises a second branch 23. The two branches are located on each side of a chamber 24 formed in a chassis 25 for the hoisting apparatus, which contains a bracket 26 which is fluidly mounted in the chamber 24 and which are pressed downwardly by the action of two springs 27, being disposed at each side of the bracket 26. The bracket 26 has at each side an extension 28 extending through slots or side openings 29 in comb 6 DK 174767 B1. 24. Each of the extensions 28 has at its upper side abutment points 30 which abut a point 31 at the two branches of the sensing arm 21,23.

En afstand 32, der eksisterer mellem klodsen 26's overside 33 og kammerets loft 34, 5 svarer til en afstand 35 mellem anlægspunktet 22 og afbryderen 15. Dog skal afstanden 35 være lidt mindre for at sikre effektiv kontakt når klodsen 26 er bragt i anlæg mod kammerets loft 34. Det vil sige, at afbrydelse sker under klodsen 26’s svingningsbevægelse.A distance 32 existing between the upper surface 33 of the bracket 26 and the ceiling ceiling 34, 5 corresponds to a distance 35 between the abutment point 22 and the switch 15. However, the distance 35 should be slightly smaller to ensure effective contact when the bracket 26 is brought into contact with the chamber ceiling 34. That is, interruption occurs during the oscillating movement of the block 26.

10 I fig. 3 og 4 illustreres en situation, hvor stroppen 4 er ført lodret igennem klodsens åbning 12. Det fremgår, at kammeret 24 er tilpasset klodsen 26, således at denne kan vippes både på langs og på tværs af stroppens udstrækning. På grund af dimensioneringen af afstandene 32, og 35 vil klodsens bevægelse via aftastningsorganet 19 først overføres til en afbryder og derved påvirke motoren 17, når klodsen kommer i anlæg 15 mod loftet 34 i kammeret 24.10 In FIG. 3 and 4 illustrate a situation in which the strap 4 is passed vertically through the opening of the block 12. It can be seen that the chamber 24 is adapted to the block 26 so that it can be tilted both longitudinally and transversely of the extension of the strap. Due to the dimensioning of the distances 32 and 35, the movement of the bricks via the sensing means 19 will first be transmitted to a switch, thereby affecting the motor 17 when the bricks arrive in abutment 15 against the ceiling 34 in the chamber 24.

Fig. 5 og 6 illustrerer en anvendelsessituation, hvor trækket i stroppen sker under en grænsevinkel 36, der er mindre end 40°. Alternativt er det muligt at anvende andre grænsevinkler, men i praksis vil vinkler, der er mindre end ca. 40-50° for lodret være 20 acceptable.FIG. 5 and 6 illustrate an application situation where the pull of the strap occurs at a boundary angle 36 which is less than 40 °. Alternatively, it is possible to use other boundary angles, but in practice angles smaller than approx. 40-50 ° for vertical be 20 acceptable.

Ved den situation, som er illustreret i fig. 5 og 6, vil den side af klodsen 26, hvorfra trækket kommer, svinges op mod kammerets loft 34. Herved vil aftastningsorganet kun påvirkes med ca. halvdelen af det mulige udslag, og punktet 22 vil ikke komme i 25 anlæg mod afbryderen 15. Der vil således ikke ske nogen afbrydelse af strømforsyningen til motoren. 1 denne viste position kan en yderligere kontakt 37, som blot er illustreret med stiplede linier i figuren, blive påvirket for at give en lyd eller et lyssignal, som advarer bruge-30 ren mod, at der optræder et skævt træk. , 7 DK 174767 B1In the situation illustrated in FIG. 5 and 6, the side of the bracket 26 from which the pull comes will be pivoted up to the ceiling of the chamber 34. This will only affect the sensing means by approx. half of the possible impact and the point 22 will not come into contact with the switch 15. There will thus be no interruption of the power supply to the motor. In this position shown, an additional contact 37, which is merely illustrated by dotted lines in the figure, may be affected to produce a sound or light signal which warns the user against an oblique feature. , 7 DK 174767 B1

Fig. 7 og 8 illustrerer en situation, hvor trækket i stroppen sker under en vinkel 36, der er større aid 40° i forhold til lodret. Den første svingning af klodsen 26 til den i fig. 6 viste position kan ske ved en vinkel på 5 -10°. Dette vil afhænge af dimensionering på fjedrene 27 samt friktion mellem klodsen 26 og stroppen 4. I denne situation vil fje-5 derkraften samt friktionen mellem stroppen 4 og klodsen 26 overvinde kraften fra fejderne 27, således at klodsen 26 trækkes til den i fig. 6 viste position. Ved træk ud over vinklen på ca. 10° vil geometrien i konstruktionen bevirke, at klodsen 26 trækkes helt op mod loftet 34. Herved påvirkes aftastningsarmen 19 til fuldt udslag, således at kontakten 16 aktiveres og afbryder strømmen til motoren.FIG. 7 and 8 illustrate a situation in which the pull in the strap occurs at an angle 36 which is greater aided 40 ° relative to the vertical. The first pivot of the bracket 26 to that of FIG. 6 can be done at an angle of 5 -10 °. This will depend on the dimensioning of the springs 27 and the friction between the block 26 and the strap 4. In this situation, the spring force as well as the friction between the strap 4 and the block 26 will overcome the force of the feeds 27, so that the block 26 is drawn to the one shown in FIG. 6. By dragging beyond the angle of approx. 10 °, the geometry of the construction will cause the bracket 26 to be pulled completely up against the ceiling 34. This affects the sensing arm 19 to the full stroke, so that the contact 16 is activated and switches off the current to the motor.

1010

Den indbyrdes dimensionering af de enkelte elementer er primært bestemt ud fra grænsevinklen 36 for stroppen, hvor det ønskes at aktivere kontakten 16. Når en vinkel 38, som er vinklen mellem den vinklede strop 4 og en linie 39, der strækker sig gennem en hjømekant 40 for klodsens åbning 12 og til en hjømekant 41, hvor klodsen 15 26 er i anlæg mod kammeret 24's loft 34, vil få ca. samme størrelse som en vinkel 42, der er vinklen mellem linien 39 og stroppen ovenover klodsen 26, så vil klodsen 26 blive tvunget over et topdødpunkt med centrum i en linie langs hjømekanten 41, hvorved klodsen 26 vipper op og lægges plant mod kammerets loft 34. Identitet mellem vinklerne 38 og 42 opnås ved den situation, som er illustreret i fig. 9 og 10.The mutual dimensioning of the individual elements is primarily determined from the boundary angle 36 of the strap, where it is desired to activate the contact 16. When an angle 38 which is the angle between the angled strap 4 and a line 39 extending through a home edge 40 for the block opening 12 and to a corner edge 41, where the block 15 26 abuts against the ceiling 34 of the chamber 24, will have approx. the same size as an angle 42 which is the angle between the line 39 and the strap above the bracket 26, then the bracket 26 will be forced over a top dead center with a center along a line edge 41, whereupon the bracket 26 tilts and is leveled against the ceiling of the chamber 34. Identity between angles 38 and 42 is achieved by the situation illustrated in FIG. 9 and 10.

2020

Den grænsevinkel, hvor denne vipning foregår, kan ændres ved at ændre fjederkraften, som presser klodsen mod bunden af kammeret. Herved påvirkes betydningen af den friktion, der optræder mod stroppen 4. Ligeledes kan vinklen påvirkes ved at ændre højden af klodsen 26 samt højden af kammeret 24, idet man herved ændrer vinklerne 25 38 og 42. Det bliver således muligt at dimensionere indretningen ifølge opfindelsen for at få den ønskede grænsevinkel, hvor overbelastningsindretningen skal stoppe motoren 17.The boundary angle at which this tilt occurs can be changed by changing the spring force which presses the bracket towards the bottom of the chamber. Hereby, the significance of the friction acting on the strap 4. is also affected by changing the height of the bracket 26 and the height of the chamber 24, thereby changing the angles 25 38 and 42. Thus, it is possible to design the device according to the invention for to obtain the desired limit angle at which the overload device must stop the motor 17.

30 I fig. 11 og 12 vises en situation, hvor overbelastningsindretningen virker som traditionel endestop. Idet stroppen 4 er dimensioneret efter åbningen 12 i klodsen 26, vil klodsen trækkes i anlæg mod loftet og aktivere kontakten 15 for at stoppe motoren, DK 174767 B1 8 når et fortykket område 43 rammer klodsen. Således vil tykkelsen af stroppen overstige den slidsformede åbning 12 i bunden af klodsen 26. Når stroppen spoles op, vil motoren 17 således afbrydes. En tilsvarende effekt vil ske, såfremt stroppen bliver snoet, eller hvis der opstår en knude på stroppen. Således vil overbelastningsindret-5 ningen også sikre hejseapparatet mod overbelastning i en sådan situation.In FIG. 11 and 12, there is shown a situation where the overload device acts as a traditional end stop. As the strap 4 is dimensioned after the opening 12 of the bracket 26, the bracket will pull against the ceiling and activate the switch 15 to stop the motor when a thickened area 43 strikes the bracket. Thus, the thickness of the strap will exceed the slot-shaped opening 12 at the bottom of the bracket 26. As the strap is wound, the motor 17 will then be interrupted. A similar effect will occur if the strap is twisted or if a knot is formed on the strap. Thus, the overload device will also protect the hoist against overload in such a situation.

Fig. 13-15 illustrerer en situation, hvor stroppen 4 udsættes for et skævt træk i retning på tværs af aftastningsarmen 19's svingningsbevægelse. Det vil sige i en retning på tværs af hejseapparatet. I denne situation vil friktion mellem stroppen 4 og åbningen 10 12 i klodsen 26 trække den ene af klodsens sider, som vender mod stroppens trækret ning op mod loftet 34 i kammeret. Herved påvirkes aftastningsarmen og kontakten 16 aktiveres. Idet aftastningsarmen 19 har en gren 21,23 på hver side af kammeret 24, og idet der er tilvejebragt en fjeder 27 ved hver side af kammeret 24 vil en afbrydelse af strømtilførslen til motoren 17 ske, uanset om det skæve træk er rettet i den ene eller 15 anden retning.FIG. 13-15 illustrate a situation in which the strap 4 is subjected to a skewed direction in the direction of the oscillating movement of the sensing arm 19. That is, in a direction across the hoist. In this situation, friction between the strap 4 and the opening 10 12 of the bracket 26 will pull one of the sides of the bracket which faces the strap pulling direction up to the ceiling 34 of the chamber. This affects the sensing arm and the switch 16 is activated. Since the sensing arm 19 has a branch 21,23 on each side of the chamber 24, and a spring 27 is provided at each side of the chamber 24, a disconnection of the power supply to the motor 17 will occur, regardless of whether the skew is directed in one or 15 other direction.

Den grænsevinkel, hvor klodsen 26 løftes mod kammerets loft ved en vinkel på tværs af hejseapparatet, vil være bestemt af friktionens størrelse samt størrelsen af fjeder-kraften.The boundary angle at which the bracket 26 is lifted toward the ceiling of the chamber at an angle across the hoist will be determined by the size of the friction as well as the magnitude of the spring force.

2020

Fig. 16-19 illustrerer en yderligere udførelsesform for indretningen ifølge opfindelsen, hvor der er tilvejebragt en rund strop 4’, der passerer gennem en klods 26’ med en rund åbning 12’. Ved oversiden af klodsen 26’ er der tilvejebragt en løs cylinder 44, der strækker sig gennem en central boring 45 i oversiden af kammeret 24’. Cylinderen 25 har en anlægsflade 22’ tilvejebragt, som en ringformet kant ved sin opefter vendende ende. Denne anlægsflade 22’ er tilvejebragt i umiddelbar nærhed af afbryderen 15.FIG. 16-19 illustrate a further embodiment of the device according to the invention in which a round strap 4 'passing through a block 26' with a round opening 12 'is provided. At the top of the block 26 ', a loose cylinder 44 extending through a central bore 45 at the top of the chamber 24' is provided. The cylinder 25 has an abutment surface 22 'provided as an annular edge at its upwardly facing end. This contact surface 22 'is provided in the immediate vicinity of the switch 15.

Som det fremgår af fig. 18 og 19, er den cirkulære klods 26’ i stand til at vippe indeni det cirkulære kammer 24’. Virkemåden vil ske efter samme princip som forklaret 30 ovenfor, men denne udførelsesform vil være i stand til at virke som overbelastnings-indretning uanset orienteringen af det skæve træk, som optræder i stroppen 4’.As shown in FIG. 18 and 19, the circular block 26 'is capable of tilting within the circular chamber 24'. The operation will be according to the same principle as explained above, but this embodiment will be capable of acting as an overload device regardless of the orientation of the skewed feature occurring in the strap 4 '.

Claims (8)

9 DK 174767 B19 DK 174767 B1 1. Overbelastningsindretning for et hejseapparat, fortrinsvis en personhejs, hvor en strop oprulles i et hus gennem en fjederbelastet stropføring, der er indrettet for at 5 kunne påvirke en kontakt for at afbryde strømmen til hejseapparatets motor når enden af stroppen rammer stropføringen og overvinder kraften fra fjederen, kendetegne t ved, at stropføringen omfatter en klods, der er forsynet med en åbning for stroppen, og som er flydende lejret i et kammer idet klodsen af fjederen presses i anlæg mod kammerets bund idet der er en givet afstand mellem klodsens overside og loftet i 10 kammeret, at klodsen er forbundet med et aftastningsorgan, der befinder sig udenfor kammeret, og som har en flade for anlæg mod kontaktens afbryder idet afstanden imellem anlægsfladen og afbryderen svarer til afstanden mellem klodsens overside og kammerets loft.An overload device for a hoist, preferably a hoist, wherein a strap is wound in a housing through a spring-loaded strap guide adapted to actuate a contact to interrupt the current to the hoist motor when the end of the strap hits the strap guide and overcomes the force of The spring, characterized in that the strap guide comprises a block provided with an opening for the strap, which is floatingly enclosed in a chamber, the block of the spring being pressed against the bottom of the chamber with a given distance between the top of the block and the ceiling. in the chamber, the bracket is connected to a sensing means located outside the chamber and having a surface for abutment against the contact switch, the distance between the abutment surface and the switch corresponding to the distance between the top surface of the bracket and the chamber ceiling. 2. Indretning ifølge krav 1,kendetegnet ved, at kammeret er dannet i en del af en chassisramme for hejseapparatet.Device according to claim 1, characterized in that the chamber is formed in a part of a chassis frame for the hoisting apparatus. 3. Indretning ifølge krav 1 eller 2 hvor den anvendte strop er båndformet, kendetegnet ved, at klodsen fortrinsvis er rektangulær og har en slids for strop- 20 pens passage, at klodsen ved modsatte sider har en forlængelse, der strækker sig ud gennem spalter i kammeret, og som ved sin overside har et punkt til anlæg mod af-tastningsorganet, der er tilvejebragt i form af en U-formet aftastningsarm med en gren på hver side af kammeret, og som er svingbart lejret ved U-ets bund, og som har anlægsfladen tilvejebragt på enden af den ene arm, som er placeret i umiddelbar nærhed 25 af afbryderen.Device according to claim 1 or 2, wherein the strap used is band-shaped, characterized in that the block is preferably rectangular and has a slot for the passage of the strap, the block having an extension extending through slots in opposite sides. the chamber, which at its upper side has a point for abutment against the sensing means provided in the form of a U-shaped sensing arm with a branch on each side of the chamber, which is pivotally mounted at the bottom of the U-side and which has the abutment surface provided on the end of one arm located in the immediate vicinity of the switch. 4. Indretning ifølge krav 1 eller 2 hvor den anvendte strop er rund, kendetegnet ved, at klodsen fortrinsvis er cirkulær og har en cirkulær åbning for stroppens passage, at klodsen ved sin overside er i anlæg mod en cylinder, der stræk- 30 ker sig gennem en central boring i oversiden af kammeret, hvilken cylinder har an- 10 DK 174767 B1 lægsfladen tilvejebragt på sin opefter vendende ende, som er placeret i umiddelbar nærhed af afbryderen.Device according to claim 1 or 2, wherein the strap used is round, characterized in that the bracket is preferably circular and has a circular opening for the passage of the strap, the bracket at its upper side abutting against a cylinder which extends through a central bore in the upper side of the chamber, which cylinder has the abutment surface provided at its upwardly facing end which is located in the immediate vicinity of the switch. 5. Indretning ifølge et hvilket som helst af de foregående krav, kendetegnet ved, 5 at kammeret og klodsen er udformet med indbyrdes størrelse således at klodsen kan vippes inden i kammeret når der udøves et skævt træk i stroppen, således at den ende side hvorfra trækket udøves svinges op i anlæg mod kammerets loft.Device according to any one of the preceding claims, characterized in that the chamber and the bracket are mutually shaped so that the bracket can be tilted within the chamber when a skew is drawn in the strap so that the end side from which the pull is Exercise is swung up in abutments against the chamber ceiling. 6. Indretning ifølge krav 5, kendetegnet ved, at friktion mellem stropføring og 10 strop er valgt således at fjederkraften overvindes ved en vinkel der er større end 5 - 10° i forhold til lodret, og at geometrien i klodsen og kammeret er valgt således at klodsen trækkes i anlæg mod kammerets loft ved træk under en vinkel over ca. 40° i forhold til lodret.Device according to Claim 5, characterized in that friction between strap guide and 10 strap is selected such that the spring force is overcome at an angle greater than 5 - 10 ° with respect to the vertical and that the geometry of the bracket and the chamber is chosen so that the brick is pulled into contact with the ceiling of the chamber by pulling at an angle above approx. 40 ° to vertical. 7. Indretning ifølge et hvilket som helst af de foregående krav, kendetegnet ved, at klodsen er fremstillet med en skråt nedefter tilspidsende åbning for stroppens passage således at stroppen ikke er i anlæg med åbningens sidekanter ved klodsens vipning.Device according to any of the preceding claims, characterized in that the block is made with an inclined downwardly tapering opening for the passage of the strap so that the strap does not abut the side edges of the opening at the tilt of the block. 8. Hejseapparat til montering i loftskinner for håndtering og transport af personer som 20 befinder sig en løftesele der er ophængt i stroppen, kendetegnet ved, at det er forsynet med en indretning ifølge et hvilket som helst af de foregående krav.Lifting device for mounting in ceiling rails for handling and transporting persons who are in a lifting belt suspended in the strap, characterized in that it is provided with a device according to any one of the preceding claims.
DK200100673A 2001-04-30 2001-04-30 Lifting device for hoisting device and hoisting device provided with such device DK174767B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK200100673A DK174767B1 (en) 2001-04-30 2001-04-30 Lifting device for hoisting device and hoisting device provided with such device
DE10219351.7A DE10219351B4 (en) 2001-04-30 2002-04-30 Overload device for a hoist and provided with such overload device hoist

Applications Claiming Priority (2)

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DK200100673 2001-04-30
DK200100673A DK174767B1 (en) 2001-04-30 2001-04-30 Lifting device for hoisting device and hoisting device provided with such device

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DK174767B1 true DK174767B1 (en) 2003-10-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447043A (en) * 1982-09-14 1984-05-08 Augustino Bocchiaro Automatic cable stop for towing winch
GB2298839B (en) * 1995-03-14 1998-10-21 Imer Int Spa Safety apparatus for electrically-operated lifting apparatus

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DK200100673A (en) 2002-10-31
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