EP0812295A1 - Conveyer, in particular a hoist - Google Patents
Conveyer, in particular a hoistInfo
- Publication number
- EP0812295A1 EP0812295A1 EP96903921A EP96903921A EP0812295A1 EP 0812295 A1 EP0812295 A1 EP 0812295A1 EP 96903921 A EP96903921 A EP 96903921A EP 96903921 A EP96903921 A EP 96903921A EP 0812295 A1 EP0812295 A1 EP 0812295A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chain
- guide
- guide element
- strand
- chain wheel
- 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
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
- B66D3/18—Power-operated hoists
- B66D3/26—Other details, e.g. housings
-
- 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
- B66D3/18—Power-operated hoists
- B66D3/24—Applications of limit switches
Definitions
- the invention relates to a conveyor, in particular a hoist, with a chain train passing through a chain wheel and driven by a motor, which is secured against jumping off the chain wheel by a chain guide and in which at least one switch or sensor is assigned to the chain guide a change in position of at least part of the chain guide switches off the drive motor of the conveyor.
- a chain conveyor of the above type with an essentially U-shaped chain guide which is pivotally mounted on bushings which enclose the drive shaft for the chain wheel of a chain strand consisting of round steel links.
- the sprocket is supported by roller bearings in the interior of the bushing already mentioned and has a bore through which the shaft of a drive motor projects, which is followed by a gear unit, the output-side pinion of which meshes with a toothed wheel that rotates is connected to the sprocket.
- the known chain conveyor changes the position or the shape of the chain strand, this leads to a pivoting movement of the chain guide and to the switching off of the drive motor for the chain wheel.
- the known construction may not be fully satisfactory insofar as its construction is complicated and expensive.
- the invention has for its object to provide a conveyor of the type under consideration, which combines the advantages of a perfect chain guide with the advantages of a simple structure.
- This object is achieved in that, in addition to a fixed guide section, the chain guide has a guide element which can be moved back and forth between two positions and serves to actuate the switch or sensor and is designed as a one-armed swivel lever, the swivel axis of which is turned away End is arranged in the region of the entry of the chain strand in the sprocket.
- the chain conveyor according to the invention has the advantage that the operating state of its chain strand is continuously monitored with very simple means, and that the user is therefore not required to check the readiness for discarding.
- the selected arrangement of the one-armed swivel lever ensures a high sensitivity of the shutdown mechanism for the drive motor of the conveyor.
- FIG. 1 shows a section through the essential parts of the chain guide of a conveyor equipped with a new chain strand and designed as a hoist
- FIG. 2 shows a section corresponding to FIG. 1 after reaching the condition of the chain strand that is ready for discarding
- FIG. 3 shows a section corresponding to FIG. 1 through a modified chain guide
- FIG. 4 shows a section corresponding to FIG. 2 through the modified chain guide according to FIG. 3 and
- FIG. 5 shows a section corresponding to FIG. 1 through a further chain guide.
- 1 is a sprocket formed as a pocket wheel with teeth 2 and pockets 3 arranged between two successive pairs of teeth 2.
- the sprocket is used to drive a chain strand 4 forming a lifting chain, the horizontal links 5 of which come to rest in the pockets 3 and its vertical members 6 engage in a gap arranged between the teeth 2 of a pair of teeth.
- the chain guide 7 has a guide element 9 which is formed by a lever pivotably mounted about an axis 8 and which is pressed by a spring 10 into a first position shown in FIG. This first position is defined by a stop 12 pressed against the left end face of a recess 11.
- a switch 14 having a feeler pin 13 and closes the supply circuit of a motor (not shown) serving to drive the chain wheel 1 at an interruption point, ie the hoist can be used.
- the division of the links 5 and 6 of the chain strand 4 increases, be it as a result of wear or overstretching, by an amount which makes it necessary to replace the chain strand 4, then it occurs in the area of the entry of the chain strand 4 into the chain wheel 1 for the so-called ascent of the horizontal links 5 onto the teeth 2 of the chain wheel 1, as indicated in FIG. 2 at point 15.
- the ascent of the horizontal link 5 at the point 15 has the result that the vertical link 6 following this horizontal link 5 is moved radially outward from the center of the chain wheel 1 and the guide element 9 of the chain guide 7 clockwise around the axis 8 pivots into a second position. This in turn leads to a displacement of the stylus 13 and opening of the switch 14 while overcoming the force of the spring 10, so that the motor for driving the chain wheel 1 is switched off and the worn chain strand 4 can be replaced.
- FIG. 5 An equally simple and therefore inexpensive solution is shown in FIG. 5.
- a guide element 19 is used to guide the chain strand 4, which is provided with a roller 18 which has a circumferential groove into which the the longitudinal member of the vertical members 6 facing the guide element 19 can be immersed.
- the chain condition is monitored in the area of the inlet of the section of the chain strand 4 connected to the load.
Abstract
In order to be able to check automatically, in a conveyer, whether a chain strand (4) used for driving a chain wheel (1) is to be discarded, the chain strand (4) is monitored in the region of the chain wheel (1) by a specially designed chain guide system (7). If, as a result of wear or elongation of the chain strand (4), horizontal members (5) move up onto the teeth (2) of the chain wheel (1), a switch (14) or sensor shifted by the guide system or a movable guide element (9) is actuated and interrupts the feed circuit of the driving device of the chain wheel (1).
Description
Förderer, insbesondere HebezeugConveyors, especially hoists
Die Erfindung betrifft einen Förderer, insbesondere ein Hebezeug, mit eine ein Kettenrad passierenden, durch einen Motor angetriebenen Kettenstrang, der durch eine Kettenführung gegen ein Abspringen vom Ket¬ tenrad gesichert ist und bei dem der Kettenführung mindestens ein Schalter oder Sensor zugeordnet ist, der bei einer Lageveränderung mindestens eines Teiles der Kettenführung den Antriebsmotor des Förderers abschaltet.The invention relates to a conveyor, in particular a hoist, with a chain train passing through a chain wheel and driven by a motor, which is secured against jumping off the chain wheel by a chain guide and in which at least one switch or sensor is assigned to the chain guide a change in position of at least part of the chain guide switches off the drive motor of the conveyor.
Aus der EP-A-0 118 302 ist ein Kettenförderer der vor¬ stehenden Art mit einer im wesentlichen U-förmigen Kettenführung bekannt, die schwenkbar auf Buchsen ge¬ lagert ist, die die Antriebswelle für das Kettenrad eines aus Rundstahlgliedern bestehenden Kettenstranges umschließen. Das Kettenrad stützt sich bei dieser Kon¬ struktion über Wälzlager im Innern der bereits erwähn¬ ten Buchse ab und weist eine Bohrung auf, durch die die Welle eines Antriebsmotors ragt, dem ein Getriebe nachgeschaltet ist, dessen ausgangsseitiges Ritzel mit einem Zahnrad kämmt, das drehfest mit dem Kettenrad verbunden ist. Kommt es bei dem bekannten Kettenförde¬ rer zu einer Veränderung der Lage oder der Form des Kettenstranges, so führt dies zu einer Schwenkbewegung der Kettenführung und zur Abschaltung des Antriebsmo¬ tors für das Kettenrad. Die bekannte Konstruktion ver¬ mag insofern nicht voll zu befriedigen, als ihr Aufbau kompliziert und aufwendig ist.From EP-A-0 118 302 a chain conveyor of the above type with an essentially U-shaped chain guide is known which is pivotally mounted on bushings which enclose the drive shaft for the chain wheel of a chain strand consisting of round steel links. In this construction, the sprocket is supported by roller bearings in the interior of the bushing already mentioned and has a bore through which the shaft of a drive motor projects, which is followed by a gear unit, the output-side pinion of which meshes with a toothed wheel that rotates is connected to the sprocket. If the known chain conveyor changes the position or the shape of the chain strand, this leads to a pivoting movement of the chain guide and to the switching off of the drive motor for the chain wheel. The known construction may not be fully satisfactory insofar as its construction is complicated and expensive.
Bei einem aus der US-2 999 623 bekannten anderen Ket¬ tenförderer werden federnd die einen Arme zweier schwenkbar gelagerter zweiarmiger Hebel gegen einen das Kettenrad umschließenden Kettenstrang gedrückt,
während die jeweils anderen Arme der Hebel zur Betäti¬ gung von Schaltern zum Abschalten des Antriebsmotors für das Kettenrad dienen. Auch diese Konstruktion ist recht aufwendig und beansprucht darüber hinaus ver¬ gleichsweise viel Platz. Als nachteilig muß zudem der Umstand angesehen werden, daß eine das sogenannte Überspringen oder Durchrutschen des Kettenstranges auf dem Kettenrad sicher verhindernde Kettenführung bei ihr fehlt.In another chain conveyor known from US Pat. No. 2,999,623, the one arms of two pivotably mounted two-armed levers are pressed resiliently against a chain strand surrounding the chain wheel, while the other arms of the lever are used to actuate switches for switching off the drive motor for the chain wheel. This construction is also quite complex and, moreover, requires a comparatively large amount of space. The fact that a chain guide that reliably prevents the so-called skipping or slipping of the chain strand on the sprocket is also disadvantageous.
Der Erfindung liegt die Aufgabe zugrunde, einen Förde¬ rer der in Betracht gezogenen Art zu schaffen, der die Vorteile einer einwandfreien Kettenführung mit den Vorteilen eines einfachen Aufbaues in sich vereint. Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Kettenführung neben einem feststehenden Führungs- abschnitt ein zwischen zwei Positionen hin- und herbe¬ wegliches, zur Betätigung des Schalters oder Sensors dienendes und als einarmiger Schwenkhebel ausgebilde¬ tes Führungselement aufweist, dessen seiner Schwenk- achse abgewandtes Ende im Bereich des Einlaufs des Kettenstranges in das Kettenrad angeordnet ist.The invention has for its object to provide a conveyor of the type under consideration, which combines the advantages of a perfect chain guide with the advantages of a simple structure. This object is achieved in that, in addition to a fixed guide section, the chain guide has a guide element which can be moved back and forth between two positions and serves to actuate the switch or sensor and is designed as a one-armed swivel lever, the swivel axis of which is turned away End is arranged in the region of the entry of the chain strand in the sprocket.
Der erfindungsgemäße Kettenförderer bietet den Vor¬ teil, daß bei ihm mit sehr einfachen Mitteln der Be¬ triebszustand seines Kettenstranges laufend überwacht wird und mithin eine Überprüfung der Ablegereife durch den Benutzer überflüssig ist. Durch die gewählte An¬ ordnung des einarmigen Schwenkhebels ist eine hohe Ansprechempfindlichkeit des Abschaltmechanismus für den Antriebsmotor des Förderers gewährleistet.The chain conveyor according to the invention has the advantage that the operating state of its chain strand is continuously monitored with very simple means, and that the user is therefore not required to check the readiness for discarding. The selected arrangement of the one-armed swivel lever ensures a high sensitivity of the shutdown mechanism for the drive motor of the conveyor.
Weitere Einzelheiten und Merkmale der Erfindung erge¬ ben sich aus den Unteransprüchen und der nachstehenden Beschreibung von drei in der beigefügten Zeichnung
dargestellten Ausführungsformen der Erfindung. Es zeigen:Further details and features of the invention emerge from the subclaims and the following description of three in the accompanying drawing illustrated embodiments of the invention. Show it:
Fig. 1 einen Schnitt durch die wesentlichen Teile der Kettenführung eines mit einem neuen Kettenstrang aus¬ gestatteten, als Hebezeug ausgebildeten Förderers,1 shows a section through the essential parts of the chain guide of a conveyor equipped with a new chain strand and designed as a hoist,
Fig. 2 einen der Figur 1 entsprechenden Schnitt nach Erreichen eines der Ablegereife entsprechenden Zustan- des des Kettenstranges,2 shows a section corresponding to FIG. 1 after reaching the condition of the chain strand that is ready for discarding,
Fig. 3 einen der Figur 1 entsprechenden Schnitt durch eine modifizierte Kettenführung,3 shows a section corresponding to FIG. 1 through a modified chain guide,
Fig. 4 einen der Figur 2 entsprechenden Schnitt durch die modifizierte Kettenführung gemäß Figur 3 und4 shows a section corresponding to FIG. 2 through the modified chain guide according to FIG. 3 and
Fig. 5 einen der Figur 1 entsprechenden Schnitt durch eine weitere Kettenführung.5 shows a section corresponding to FIG. 1 through a further chain guide.
In den Figuren l und 2 ist 1 ein als Taschenrad ausge¬ bildetes Kettenrad mit Zähnen 2 und zwischen jeweils zwei aufeinanderfolgenden Paaren von Zähnen 2 angeord¬ neten Taschen 3. Das Kettenrad dient zum Antrieb eines eine Hubkette bildenden Kettenstrangs 4, dessen Hori¬ zontalglieder 5 in den Taschen 3 zu liegen kommen und dessen Vertikalglieder 6 in einen zwischen den Zähnen 2 eines Zahnpaares angeordneten Spalt greifen. Beim Passieren des Kettenrades 1 ist der Kettenstrang 4 durch eine Kettenführung 7 gegen ein Abspringen vom Kettenrad 1 gesichert. Die Kettenführung 7 weist ein von einem um eine Achse 8 schwenkbar gelagerten Hebel gebildetes Führungselement 9 auf, das durch eine Feder 10 in eine in Figur 1 dargestellte erste Position ge¬ drückt wird. Diese erste Position ist durch einen ge¬ gen die linke Stirnfläche einer Ausnehmung 11 gedrück¬ ten Anschlag 12 definiert. In der ersten Position des
Führungselementes 9 hält ein einen Taststift 13 auf¬ weisender Schalter 14 den Speisekreis eines zum An¬ trieb des Kettenrades 1 dienenden, nicht dargestellten Motors an einer Unterbrechungsstelle geschlossen, d.h. mit dem Hebezeug kann gearbeitet werden.In FIGS. 1 and 2, 1 is a sprocket formed as a pocket wheel with teeth 2 and pockets 3 arranged between two successive pairs of teeth 2. The sprocket is used to drive a chain strand 4 forming a lifting chain, the horizontal links 5 of which come to rest in the pockets 3 and its vertical members 6 engage in a gap arranged between the teeth 2 of a pair of teeth. When passing the chain wheel 1, the chain strand 4 is secured against jumping off the chain wheel 1 by a chain guide 7. The chain guide 7 has a guide element 9 which is formed by a lever pivotably mounted about an axis 8 and which is pressed by a spring 10 into a first position shown in FIG. This first position is defined by a stop 12 pressed against the left end face of a recess 11. In the first position of the Guide element 9 holds a switch 14 having a feeler pin 13 and closes the supply circuit of a motor (not shown) serving to drive the chain wheel 1 at an interruption point, ie the hoist can be used.
Nimmt die Teilung der Glieder 5 und 6 des Kettenstran¬ ges 4, sei es infolge Verschleißes oder Überdehnung, um einen Betrag zu, der einen Austausch des Ketten- Stranges 4 erforderlich macht, so kommt es im Bereich des Einlaufs des Kettenstranges 4 in das Kettenrad 1 zum sogenannten Aufsteigen der Horizontalglieder 5 auf die Zähne 2 des Kettenrades 1, wie dies in Figur 2 an der Stelle 15 angedeutet ist. Das Aufsteigen des Hori¬ zontalgliedes 5 an der Stelle 15 hat zur Folge, daß das auf dieses Horizontalglied 5 folgende Vertikal- glied 6 vom Zentrum des Kettenrades 1 weg radial nach außen bewegt wird und dabei das Führungselement 9 der Kettenführung 7 im Uhrzeigersinn um die Achse 8 in eine zweite Position schwenkt. Dies wiederum führt unter Überwindung der Kraft der Feder 10 zu einer Ver¬ lagerung des Taststiftes 13 und zum Öffnen des Schal¬ ters 14, so daß der Motor zum Antrieb des Kettenrades 1 abgeschaltet wird und ein Austausch des verschlisse¬ nen Kettenstranges 4 erfolgen kann.If the division of the links 5 and 6 of the chain strand 4 increases, be it as a result of wear or overstretching, by an amount which makes it necessary to replace the chain strand 4, then it occurs in the area of the entry of the chain strand 4 into the chain wheel 1 for the so-called ascent of the horizontal links 5 onto the teeth 2 of the chain wheel 1, as indicated in FIG. 2 at point 15. The ascent of the horizontal link 5 at the point 15 has the result that the vertical link 6 following this horizontal link 5 is moved radially outward from the center of the chain wheel 1 and the guide element 9 of the chain guide 7 clockwise around the axis 8 pivots into a second position. This in turn leads to a displacement of the stylus 13 and opening of the switch 14 while overcoming the force of the spring 10, so that the motor for driving the chain wheel 1 is switched off and the worn chain strand 4 can be replaced.
Während bei der Ausführungsform gemäß den Figuren 1 und 2 das Führungselernent 9 eine an die Krümmung der Kettenführung 7 angepaßte Krümmung aufweist, wird bei der Ausführungsform gemäß den Figuren 3 und 4 ein ge¬ rades Führungselement 16 verwendet, das kostengünsti¬ ger herstellbar ist. In diesem Fall ist im übrigen nur die erste in Figur 3 dargestellte Position des Füh¬ rungselementes 16 durch einen Anschlag 17 definiert. Ansonsten entsprechen der Aufbau und die Funktion der
zweiten Ausführungsform den im Zusammenhang mit der Beschreibung der Ausführungsform gemäß den Figuren 1 und 2 geschilderten Gegebenheiten, so daß insoweit auf die vorausgegangenen Ausführungen verwiesen werden kann.While in the embodiment according to FIGS. 1 and 2 the guide element 9 has a curvature which is adapted to the curvature of the chain guide 7, in the embodiment according to FIGS. 3 and 4 a straight guide element 16 is used which can be manufactured more cost-effectively. In this case, only the first position of the guide element 16 shown in FIG. 3 is defined by a stop 17. Otherwise, the structure and function of the second embodiment, the circumstances described in connection with the description of the embodiment according to FIGS. 1 and 2, so that reference can be made to the previous statements in this respect.
Eine ebenfalls einfache und mithin kostengünstige Lö¬ sung zeigt die Fig. 5. Bei der in ihr dargestellten Konstruktion dient zur Führung des Kettenstranges 4 ein Führungselement 19, das mit einer Rolle 18 verse¬ hen ist, die eine umlaufende Nut aufweist, in die die dem Führungselement 19 zugewandten Längsschenkel der Vertikalglieder 6 eintauchen können.An equally simple and therefore inexpensive solution is shown in FIG. 5. In the construction shown in it, a guide element 19 is used to guide the chain strand 4, which is provided with a roller 18 which has a circumferential groove into which the the longitudinal member of the vertical members 6 facing the guide element 19 can be immersed.
In allen beschriebenen Fällen erfolgt die Überwachung des Kettenzustandes im Bereich des Einlaufes des mit der Last verbundenen Abschnittes des Kettenstranges 4.
In all the cases described, the chain condition is monitored in the area of the inlet of the section of the chain strand 4 connected to the load.
Claims
1. Förderer, insbesondere Hebezeug, mit einem ein Ket¬ tenrad passierenden, durch einen Motor angetriebenen Kettenstrang, der durch eine Kettenführung gegen ein Abspringen vom Kettenrad gesichert ist und bei dem der Kettenführung mindestens ein Schalter oder Sensor zu¬ geordnet ist, der bei einer Lageveränderung mindestens eines Teiles der Kettenführung den Antriebsmotor des Förderers abschaltet, dadurch, gekennzeichnet, daß die Kettenführung (7) neben einem feststehenden Führungs- abschnitt ein zwischen zwei Positionen hin- und herbe¬ wegliches zur Betätigung des Schalters (14) oder Sen¬ sors (21) dienendes und als einarmiger Schwenkhebel ausgebildetes Führungselement (9;16;19) aufweist, des¬ sen seiner Schwenkachse (8) abgewandtes Ende im Be¬ reich des Einlaufe des Kettenstranges (4) in das Ket¬ tenrad (1) angeordnet ist.1. Conveyor, in particular a hoist, with a chain train passing through a chain wheel and driven by a motor, which is secured against jumping off the chain wheel by a chain guide and in which the chain guide is assigned at least one switch or sensor which is associated with one Changing the position of at least part of the chain guide switches off the drive motor of the conveyor, characterized in that, in addition to a fixed guide section, the chain guide (7) also moves back and forth between two positions for actuating the switch (14) or sensor ( 21) serving and as a one-armed swivel lever guide element (9; 16; 19), whose end (8) facing away from its swivel axis is arranged in the region of the entry of the chain strand (4) into the sprocket (1).
2. Förderer nach Anspruch 1, dadurch gekennzeichnet, daß das Führungselement (9;16;19) durch eine Feder (10) in eine durch einen Anschlag (12;17) definierte Ausgangsposition gedrückt ist.2. Conveyor according to claim 1, characterized in that the guide element (9; 16; 19) is pressed by a spring (10) into a starting position defined by a stop (12; 17).
3. Förderer nach Anspruch l oder 2, dadurch gekenn¬ zeichnet, daß der das Führungselement (9) bildende Schwenkhebel eine der Bewegungsbahn des Kettenstranges (4) im Bereich des Kettenrades (1) angepaßte Krümmung aufweist.3. Conveyor according to claim 1 or 2, characterized in that the pivoting lever forming the guide element (9) has a curvature which is adapted to the path of movement of the chain strand (4) in the region of the chain wheel (1).
4. Förderer nach Anspruch 1 oder 2, dadurch gekenn¬ zeichnet, daß der das Führungselement (16) bildende Schwenkhebel gerade ausgebildet ist. 4. Conveyor according to claim 1 or 2, characterized gekenn¬ characterized in that the guide element (16) forming the pivot lever is straight.
5. Förderer nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Führungselement (19) mit einer Rolle (18) versehen ist. 5. Conveyor according to one or more of claims 1 to 4, characterized in that the guide element (19) is provided with a roller (18).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19508727 | 1995-02-28 | ||
| DE19508727A DE19508727C2 (en) | 1995-02-28 | 1995-02-28 | Conveyors, especially hoists |
| PCT/DE1996/000345 WO1996026885A1 (en) | 1995-02-28 | 1996-02-23 | Conveyer, in particular a hoist |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0812295A1 true EP0812295A1 (en) | 1997-12-17 |
| EP0812295B1 EP0812295B1 (en) | 1998-12-23 |
Family
ID=7756357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96903921A Expired - Lifetime EP0812295B1 (en) | 1995-02-28 | 1996-02-23 | Conveyer, in particular a hoist |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0812295B1 (en) |
| AT (1) | ATE174870T1 (en) |
| DE (2) | DE19508727C2 (en) |
| WO (1) | WO1996026885A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6925794B2 (en) | 2000-08-09 | 2005-08-09 | Rud Kettenfabrik Reiger & Dietz Gmbh U. Co. | Chain, chain wheel and chain transmission for lifting gear |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10360163B3 (en) * | 2003-12-20 | 2005-02-17 | Demag Cranes & Components Gmbh | Testing gauge for determining wear of steel linkage chain for lifting tool using relatively spaced checking pins integrated in chain winch |
| JP6082685B2 (en) * | 2013-10-21 | 2017-02-15 | 株式会社日立産機システム | Electric chain block |
| FI127826B (en) | 2014-08-01 | 2019-03-15 | Konecranes Oyj | Method of detecting a worn link in a chain, and a hoist arrangement |
| CN104773666A (en) * | 2015-04-30 | 2015-07-15 | 重庆维大力起重设备有限公司 | Lifting chain guiding device of loop chain hand-drive block |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2637525A (en) * | 1949-06-30 | 1953-05-05 | Yale & Towne Mfg Co | Hoist limit mechanism |
| GB681040A (en) * | 1950-06-01 | 1952-10-15 | King Ltd Geo W | Improvements in or relating to guards for protecting loaded chains |
| US2999623A (en) * | 1957-11-26 | 1961-09-12 | King Donald Mayer | Chain guards for electrically operated hoist pulley blocks |
| FR1259344A (en) * | 1960-06-14 | 1961-04-21 | King Ltd Geo W | Switch mechanism for electrically operated elevator, elevator and hoist pulleys with two chain guards |
| JPS6016496U (en) * | 1983-03-02 | 1985-02-04 | 象印チエンブロツク株式会社 | electric chain block |
-
1995
- 1995-02-28 DE DE19508727A patent/DE19508727C2/en not_active Expired - Fee Related
-
1996
- 1996-02-23 AT AT96903921T patent/ATE174870T1/en not_active IP Right Cessation
- 1996-02-23 EP EP96903921A patent/EP0812295B1/en not_active Expired - Lifetime
- 1996-02-23 WO PCT/DE1996/000345 patent/WO1996026885A1/en active IP Right Grant
- 1996-02-23 DE DE59601048T patent/DE59601048D1/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9626885A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6925794B2 (en) | 2000-08-09 | 2005-08-09 | Rud Kettenfabrik Reiger & Dietz Gmbh U. Co. | Chain, chain wheel and chain transmission for lifting gear |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE174870T1 (en) | 1999-01-15 |
| EP0812295B1 (en) | 1998-12-23 |
| WO1996026885A1 (en) | 1996-09-06 |
| DE19508727A1 (en) | 1996-08-29 |
| DE59601048D1 (en) | 1999-02-04 |
| DE19508727C2 (en) | 1997-07-17 |
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