EP0812295B1 - Conveyer, in particular a hoist - Google Patents

Conveyer, in particular a hoist Download PDF

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Publication number
EP0812295B1
EP0812295B1 EP96903921A EP96903921A EP0812295B1 EP 0812295 B1 EP0812295 B1 EP 0812295B1 EP 96903921 A EP96903921 A EP 96903921A EP 96903921 A EP96903921 A EP 96903921A EP 0812295 B1 EP0812295 B1 EP 0812295B1
Authority
EP
European Patent Office
Prior art keywords
chain
guide
conveyor
strand
guide element
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.)
Expired - Lifetime
Application number
EP96903921A
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German (de)
French (fr)
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EP0812295A1 (en
Inventor
Hans Dalferth
Rolf Sinz
Alfred Puppel
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.)
RUD Kettenfabrik Rieger und Dietz GmbH and Co KG
Original Assignee
RUD Kettenfabrik Rieger und Dietz GmbH and Co KG
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 RUD Kettenfabrik Rieger und Dietz GmbH and Co KG filed Critical RUD Kettenfabrik Rieger und Dietz GmbH and Co KG
Publication of EP0812295A1 publication Critical patent/EP0812295A1/en
Application granted granted Critical
Publication of EP0812295B1 publication Critical patent/EP0812295B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 sprocket passing through it chain drive driven by a motor which through a chain guide to prevent it from jumping off the sprocket is secured and that of the chain guide at least one switch or sensor is assigned, if at least part of the position changes the chain guide the drive motor of the conveyor switches off.
  • a chain conveyor is the above kind of an essentially U-shaped Known chain guide, which is pivotally mounted on bushings which is the drive shaft for the sprocket a chain strand consisting of round steel links enclose.
  • the sprocket is supported in this construction about rolling bearings inside the already mentioned Bush and has a hole through which the shaft of a drive motor protrudes, which is a gear is connected downstream, the output pinion with a gear meshes with the sprocket connected is.
  • the well-known construction can not fully satisfactory in that their structure is complicated and time-consuming.
  • the invention has for its object a conveyor of the kind contemplated to create the Advantages of a perfect chain guide with the Advantages of a simple structure combined.
  • This object is achieved in that the chain guide next to a fixed guide section one that moves back and forth between two positions, to operate the switch or sensor serving and designed as a one-armed swivel lever Has guide element, its its pivot axis opposite end in the area of the inlet of the Chain strand is arranged in the sprocket.
  • the chain conveyor according to the invention offers the advantage that with him the operating state with very simple means of its chain strand continuously monitored is and therefore a review of the discard the user is superfluous. Due to the chosen arrangement the one-armed swivel lever is a high one Switch-off mechanism responsiveness for ensures the drive motor of the conveyor.
  • 1 is a pocket wheel Sprocket with teeth 2 and between each two successive pairs of teeth 2 arranged Pockets 3.
  • the chain wheel is used to drive one a lifting chain forming chain strand 4, the horizontal links 5 come to lie in the pockets 3 and whose vertical links 6 in one between the teeth Grip 2 of a pair of teeth arranged.
  • the chain guide 7 has by a lever pivotally mounted about an axis 8 formed guide element 9 on by a spring 10 pressed into a first position shown in Figure 1 becomes. This first position is opposed by one the left end face of a recess 11 pressed Stop 12 defined.
  • the Guide element 9 holds a stylus 13 Switch 14 the supply circuit one to drive the sprocket 1 serving, not shown Motor closed at an interruption point, i.e. the hoist can be used.
  • FIG. 5 An equally simple and therefore inexpensive solution shows Fig. 5.
  • Construction serves to guide the chain strand 4 a guide element 19 provided with a roller 18 is, which has a circumferential groove in which the the longitudinal leg of the guide element 19 Vertical members 6 can immerse.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Conveyors (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Intermediate Stations On Conveyors (AREA)

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

Die Erfindung betrifft einen Förderer, insbesondere ein Hebezeug, mit einem ein Kettenrad 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 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 sprocket passing through it chain drive driven by a motor which through a chain guide to prevent it from jumping off the sprocket is secured and that of the chain guide at least one switch or sensor is assigned, if at least part of the position changes the chain guide the drive motor of the conveyor switches off.

Aus der EP-A-0 118 302 ist ein Kettenförderer der vorstehenden Art mit einer im wesentlichen U-förmigen Kettenführung bekannt, die schwenkbar auf Buchsen gelagert ist, die die Antriebswelle für das Kettenrad eines aus Rundstahlgliedern bestehenden Kettenstranges umschließen. Das Kettenrad stützt sich bei dieser Konstruktion über Wälzlager im Innern der bereits erwähnten 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 Kettenförderer zu einer Veränderung der Lage oder der Form des Kettenstranges, so führt dies zu einer Schwenkbewegung der Kettenführung und zur Abschaltung des Antriebsmotors für das Kettenrad. Die bekannte Konstruktion vermag insofern nicht voll zu befriedigen, als ihr Aufbau kompliziert und aufwendig ist.From EP-A-0 118 302 a chain conveyor is the above Kind of an essentially U-shaped Known chain guide, which is pivotally mounted on bushings which is the drive shaft for the sprocket a chain strand consisting of round steel links enclose. The sprocket is supported in this construction about rolling bearings inside the already mentioned Bush and has a hole through which the shaft of a drive motor protrudes, which is a gear is connected downstream, the output pinion with a gear meshes with the sprocket connected is. It comes with the well-known chain conveyor to change the location or shape of the Chain strand, this leads to a pivoting movement the chain guide and to switch off the drive motor for the sprocket. The well-known construction can not fully satisfactory in that their structure is complicated and time-consuming.

Bei einem aus der US-2 999 623 bekannten anderen Kettenförderer 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 Betätigung von Schaltern zum Abschalten des Antriebsmotors für das Kettenrad dienen. Auch diese Konstruktion ist recht aufwendig und beansprucht darüber hinaus vergleichsweise 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 the case of another chain conveyor known from US Pat. No. 2,999,623 the two arms become resilient pivoted two-armed lever against one the chain strand surrounding the chain wheel is pressed, while the other arms are the lever for actuation of switches for switching off the drive motor serve for the sprocket. This construction is also quite complex and also comparatively demanding lots of space. Another disadvantage is the The fact that a so-called Skip or slip through the chain strand the chain guide safely prevents the chain wheel she misses.

Der Erfindung liegt die Aufgabe zugrunde, einen Förderer 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 Führungsabschnitt ein zwischen zwei Positionen hin- und herbewegliches, zur Betätigung des Schalters oder Sensors dienendes und als einarmiger Schwenkhebel ausgebildetes Führungselement aufweist, dessen seiner Schwenkachse abgewandtes Ende im Bereich des Einlaufs des Kettenstranges in das Kettenrad angeordnet ist.The invention has for its object a conveyor of the kind contemplated to create the Advantages of a perfect chain guide with the Advantages of a simple structure combined. This object is achieved in that the chain guide next to a fixed guide section one that moves back and forth between two positions, to operate the switch or sensor serving and designed as a one-armed swivel lever Has guide element, its its pivot axis opposite end in the area of the inlet of the Chain strand is arranged in the sprocket.

Der erfindungsgemäße Kettenförderer bietet den Vorteil, daß bei ihm mit sehr einfachen Mitteln der Betriebszustand seines Kettenstranges laufend überwacht wird und mithin eine Überprüfung der Ablegereife durch den Benutzer überflüssig ist. Durch die gewählte Anordnung des einarmigen Schwenkhebels ist eine hohe Ansprechempfindlichkeit des Abschaltmechanismus für den Antriebsmotor des Förderers gewährleistet.The chain conveyor according to the invention offers the advantage that with him the operating state with very simple means of its chain strand continuously monitored is and therefore a review of the discard the user is superfluous. Due to the chosen arrangement the one-armed swivel lever is a high one Switch-off mechanism responsiveness for ensures the drive motor of the conveyor.

Weitere Einzelheiten und Merkmale der Erfindung ergeben sich aus den Unteransprüchen und der nachstehenden Beschreibung von drei in der beigefügten Zeichnung dargestellten Ausführungsformen der Erfindung. Es zeigen:

  • Fig. 1 einen Schnitt durch die wesentlichen Teile der Kettenführung eines mit einem neuen Kettenstrang ausgestatteten, als Hebezeug ausgebildeten Förderers,
  • Fig. 2 einen der Figur 1 entsprechenden Schnitt nach Erreichen eines der Ablegereife entsprechenden Zustandes des Kettenstranges,
  • Fig. 3 einen der Figur 1 entsprechenden Schnitt durch eine modifizierte Kettenführung,
  • Fig. 4 einen der Figur 2 entsprechenden Schnitt durch die modifizierte Kettenführung gemäß Figur 3 und
  • Fig. 5 einen der Figur 1 entsprechenden Schnitt durch eine weitere Kettenführung.
    • Further details and features of the invention emerge from the subclaims and the following description of three embodiments of the invention illustrated in the accompanying drawing. Show it:
  • 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,
  • 2 shows a section corresponding to FIG. 1 after reaching the condition of the chain strand that is ready for discarding,
  • 3 shows a section corresponding to FIG. 1 through a modified chain guide,
  • 4 shows a section corresponding to FIG. 2 through the modified chain guide according to FIG. 3 and
  • 5 shows a section corresponding to FIG. 1 through a further chain guide.

    • In den Figuren 1 und 2 ist 1 ein als Taschenrad ausgebildetes Kettenrad mit Zähnen 2 und zwischen jeweils zwei aufeinanderfolgenden Paaren von Zähnen 2 angeordneten Taschen 3. Das Kettenrad dient zum Antrieb eines eine Hubkette bildenden Kettenstrangs 4, dessen Horizontalglieder 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 gedrückt wird. Diese erste Position ist durch einen gegen die linke Stirnfläche einer Ausnehmung 11 gedrückten Anschlag 12 definiert. In der ersten Position des Führungselementes 9 hält ein einen Taststift 13 aufweisender Schalter 14 den Speisekreis eines zum Antrieb 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 pocket wheel Sprocket with teeth 2 and between each two successive pairs of teeth 2 arranged Pockets 3. The chain wheel is used to drive one a lifting chain forming chain strand 4, the horizontal links 5 come to lie in the pockets 3 and whose vertical links 6 in one between the teeth Grip 2 of a pair of teeth arranged. At the Passing the chain wheel 1 is the chain strand 4 by a chain guide 7 against jumping off Sprocket 1 secured. The chain guide 7 has by a lever pivotally mounted about an axis 8 formed guide element 9 on by a spring 10 pressed into a first position shown in Figure 1 becomes. This first position is opposed by one the left end face of a recess 11 pressed Stop 12 defined. In the first position of the Guide element 9 holds a stylus 13 Switch 14 the supply circuit one to drive the sprocket 1 serving, not shown Motor closed at an interruption point, i.e. the hoist can be used.

    Nimmt die Teilung der Glieder 5 und 6 des Kettenstranges 4, sei es infolge Verschleißes oder Überdehnung, um einen Betrag zu, der einen Austausch des Kettenstranges 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 Horizontalgliedes 5 an der Stelle 15 hat zur Folge, daß das auf dieses Horizontalglied 5 folgende Vertikalglied 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 Verlagerung des Taststiftes 13 und zum Öffnen des Schalters 14, so daß der Motor zum Antrieb des Kettenrades 1 abgeschaltet wird und ein Austausch des verschlissenen Kettenstranges 4 erfolgen kann.Takes the division of links 5 and 6 of the chain strand 4, whether due to wear or overstretching, by an amount equal to an exchange of the chain strand 4 requires, so it comes in the area the entry of the chain strand 4 into the chain wheel 1 for the so-called ascent of the horizontal links 5 the teeth 2 of the chain wheel 1, as shown in Figure 2 the point 15 is indicated. The ascent of the horizontal link 5 at position 15 has the consequence that the vertical member following this horizontal member 5 6 radially away from the center of the chain wheel 1 is moved outside and the guide element 9 of the Chain guide 7 clockwise around axis 8 in a second position pivots. This in turn leads overcoming the force of the spring 10 to a displacement the stylus 13 and to open the switch 14, so that the motor for driving the sprocket 1 is turned off and an exchange of the worn out Chain strand 4 can be done.

    Während bei der Ausführungsform gemäß den Figuren 1 und 2 das Führungselement 9 eine an die Krümmung der Kettenführung 7 angepaßte Krümmung aufweist, wird bei der Ausführungsform gemäß den Figuren 3 und 4 ein gerades Führungselement 16 verwendet, das kostengünstiger herstellbar ist. In diesem Fall ist im übrigen nur die erste in Figur 3 dargestellte Position des Führungselementes 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 one to the curvature of the Chain guide 7 has adapted curvature at the embodiment according to Figures 3 and 4 a straight Guide element 16 used, the less expensive can be produced. In this case, by the way, is only the first position of the guide element shown in Figure 3 16 defined by a stop 17. Otherwise the structure and function correspond to second embodiment in connection with the Description of the embodiment according to FIGS. 1 and 2 described circumstances, so that to that extent the previous statements are referred to can.

    Eine ebenfalls einfache und mithin kostengünstige Lösung zeigt die Fig. 5. Bei der in ihr dargestellten Konstruktion dient zur Führung des Kettenstranges 4 ein Führungselement 19, das mit einer Rolle 18 versehen 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 shows Fig. 5. In the shown in it Construction serves to guide the chain strand 4 a guide element 19 provided with a roller 18 is, which has a circumferential groove in which the the longitudinal leg of the guide element 19 Vertical members 6 can immerse.

    In allen beschriebenen Fällen erfolgt die Überwachung des Kettenzustandes im Bereich des Einlaufes des mit der Last verbundenen Abschnittes des Kettenstranges 4.Monitoring is carried out in all the cases described of the chain condition in the area of the inlet of the the load-connected section of the chain strand 4.

    Claims (5)

    1. A conveyor, in particular a hoist, having a chain strand which passes a chain wheel, is driven by a motor and is prevented from jumping off the chain wheel by a chain guide, and in which at least one switch or sensor is allocated to the chain guide, which switch or sensor switches off the drive motor of the conveyor if there is a change in the position of at least one part of the chain guide, wherein the chain guide (7) has in addition to a fixed guide section a guide element (9; 16; 19) which is movable back and forth between two positions, serves to actuate the switch (14) or sensor (21) and is designed as a single-armed pivoted lever and the end of which remote from its pivot (8) is arranged in the region in which the chain strand (4) enters the chain wheel (1).
    2. The conveyor as claimed in claim 1, wherein the guide element (9; 16; 19) is pressed by a spring (10) into an initial position defined by a stop (12; 17).
    3. The conveyor as claimed in claim 1 or 2, wherein the pivoted lever forming the guide element (9) has a curvature adapted to the path of movement of the chain strand (4) in the region of the chain wheel (1).
    4. The conveyor as claimed in claim 1 or 2, wherein the pivoted lever forming the guide element (16) is of straight design.
    5. The conveyor as claimed in one or more of claims 1 to 4, wherein the guide element (19) is provided with a roller (18).
    EP96903921A 1995-02-28 1996-02-23 Conveyer, in particular a hoist Expired - Lifetime EP0812295B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    DE19508727A DE19508727C2 (en) 1995-02-28 1995-02-28 Conveyors, especially hoists
    DE19508727 1995-02-28
    PCT/DE1996/000345 WO1996026885A1 (en) 1995-02-28 1996-02-23 Conveyer, in particular a hoist

    Publications (2)

    Publication Number Publication Date
    EP0812295A1 EP0812295A1 (en) 1997-12-17
    EP0812295B1 true 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 (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2002012753A1 (en) * 2000-08-09 2002-02-14 Rud-Kettenfabrik Rieger & Dietz Gmbh U.Co. Chain, chain wheel and chain transmission for lifting gear
    CN104555785A (en) * 2013-10-21 2015-04-29 株式会社日立产机系统 Electric chain hoist

    Families Citing this family (3)

    * Cited by examiner, † Cited by third party
    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
    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)

    * Cited by examiner, † Cited by third party
    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

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    WO2002012753A1 (en) * 2000-08-09 2002-02-14 Rud-Kettenfabrik Rieger & Dietz Gmbh U.Co. Chain, chain wheel and chain transmission for lifting gear
    CN104555785A (en) * 2013-10-21 2015-04-29 株式会社日立产机系统 Electric chain hoist

    Also Published As

    Publication number Publication date
    DE19508727A1 (en) 1996-08-29
    ATE174870T1 (en) 1999-01-15
    DE59601048D1 (en) 1999-02-04
    WO1996026885A1 (en) 1996-09-06
    EP0812295A1 (en) 1997-12-17
    DE19508727C2 (en) 1997-07-17

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