EP0704404B1 - Lifting platform - Google Patents

Lifting platform Download PDF

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Publication number
EP0704404B1
EP0704404B1 EP95115101A EP95115101A EP0704404B1 EP 0704404 B1 EP0704404 B1 EP 0704404B1 EP 95115101 A EP95115101 A EP 95115101A EP 95115101 A EP95115101 A EP 95115101A EP 0704404 B1 EP0704404 B1 EP 0704404B1
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EP
European Patent Office
Prior art keywords
elevating
table according
drive
tabletop
elevating member
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EP95115101A
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German (de)
French (fr)
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EP0704404A1 (en
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Peter Ekkehard Heinrichs
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065Scissor linkages, i.e. X-configuration

Definitions

  • the invention relates to a lifting table according to the Preamble of claim 1.
  • DE-G 92 17 366 describes another lifting table according to the preamble of claim 1, to each Pair of scissors one firmly connected to the scissor arm has semicircular tooth segment that concentrically the pivot joint connecting the scissor arms is arranged and in which a drive pinion engages.
  • the semicircular tooth segment requires a large height in retracted state of the lifting table.
  • DE-B 10 82 023 describes a lifting table in which lifting and lowering the table top with the help of a Tangential cam is carried out in a is moved in the horizontal direction, whereby a Base circle disc with the help of a chain parallel to Rolls the table level and the tangential cam on a roller attacks a scissor link. This results in one unfavorable, changing leverage.
  • Lift tables are used in many areas in the world industrial production, for example in vehicle construction and also used in transportation to work pieces or others Raise and lower goods.
  • safe parallel guidance the table top to the desired lifting heights and one if possible jerk-free drive, it also occurs with such lifting tables depends on the height when lowered to keep small, so that no special pits at the installation site required are.
  • the invention is therefore based on the object To create the lifting table, the fast lifting and Lowering movements for small motor and constructive Effort allows, in the lowered state only little Height and does not require a hydraulic drive.
  • the solution to the problem is characterized in claim 1.
  • the circular segment-shaped lifting member can with a large radius have a large arc length despite the low overall height is advantageous as a stroke and controlled system and at the same time enables high translation in a simple way, for example in that the circle segment as a rack is formed, which meshes with a driven pinion.
  • the drive for example using a worm drive results in a Self-locking, so that the lifting table also prevents falls Energy failure is secured.
  • the result is a favorable movement diagram in which the Lift movement starts slowly, then with increasing Speed occurs and finally when the maximum lifting height becomes slower again. This is a gentle lifting and lowering despite high speed possible.
  • the leadership of the lifting member two in Spaced, preferably stored in the floor frame Include pairs of rollers or rollers, one outside the Circle segment-shaped rail containing a segment of a circle capture from outside and inside.
  • the leadership of the Lifting member also two spaced on the lifting member Contain pairs of rollers or rollers, one preferably in Floor frame fixed, circular segment-shaped rail with the same radius as the lifting link from outside and inside capture or as single rolls or rolls in a groove of Run rail.
  • the drive of the lifting member can be done in many ways respectively.
  • a further development is advantageous the invention, however, that the drive by means of at least one arranged on the circular segment surface of the lifting member Gearing and each meshing with it, preferably stored in the floor frame and by a motor driven pinion.
  • the gearing can also be a rack gear.
  • a modification provides that the drive by means of at least one on the Circle segment area arranged drive chain and each one that meshes with it, preferably in the floor frame mounted sprocket and driven by a motor he follows.
  • the drive chain can with guide roles around the Sprocket be deflected and is at the beginning and end of Lifting member attached.
  • the leadership of the table top can be known in itself Way with at least one pair of scissors, the arms with one end in the floor frame or on the table rotatably and with its other end slidable in a slot of the Table or the floor frame are stored. It is expedient, the one end of the lifting member slidably on to attack the end of the scissor arm that on Table is rotatably mounted. This results at the same time also a translation of the lifting movement of the Lifting member on the lifting movement of the table top.
  • the lifting device can have at least two circular segment-shaped lifting members, which are arranged in opposite directions and each with one end opposite ends of the table top slidable attack. This will lift the stroke directly onto both Ends of the table top transferred, resulting in high efficiency and high stability. At the same time it becomes a parallel guidance of the table top forced.
  • the complementary Stabilization in the horizontal direction can turn through one or more scissors are performed.
  • the attacking on the table top Ends of the lifting links via two counter-rotating racks connected with a gear on it comb opposite sides, the free running on the Table top is stored. The racks then prevent that the table top during the lifting or lowering movement moves laterally, so that here too a safe guidance he follows.
  • the opposite Racks and the gear can also be cocked revolving chain can be provided on the table top, the upper run with one lifting link and its lower run are connected to the other lifting member.
  • a table top 2 is on both ends and on both sides of two scissors 3 (only one is visible) worn, each two in the middle by an axis 4 have connected arms or bars 3a and 3b.
  • the spars 3a are rotatably supported at one end of the table top 2 at 5 and slide in slots 6 of the bottom plate at the other end 1. Accordingly, the other arms or bars 3b are with one end at 7 rotatably mounted in the base plate 1 and slide at the other end in a slot 8 of the table top 2nd
  • the table top 2 is raised and lowered with a circular segment-shaped lifting element (seen from the side) 9, which is designed as a truss in the exemplary embodiment is.
  • a single "half" Lifting element 9 can be provided, which acts on a pair of scissors 3, but preferably two identical lifting members 9 on both Scissors 3.
  • Then serve to guide the lifting members 9 a total of eight roles, two of which are couples in the drawing are shown, namely in the bottom frame 1 at a distance stored roller pairs 10a, 10b and 11a, 11b.
  • the roles 10a, 11a run on the inside of circular arcs Rails 9a of the lifting member 9 and the rollers 10b, 11b the outside.
  • the lifting member 9 has a Toothing 12, in which a pinion 13 engages is mounted coaxially with the roller 10b.
  • the pinion will by a motor (not shown), preferably one regulated electric motor with motor brake, driven.
  • the lifting member 9 with two rollers 14 (in the drawing arranged one behind the other) in the on the bars 3a grooves 15 provided.
  • the pairs of rollers 10a, 10b, 11a, 11b can each by so-called arch guides are replaced, which as Guide elements contain balls or rollers and as Components are commercially available.
  • the Lift member 9 driven by the pinion 13 and from the in 2 shown position in the direction of FIG .. 1 move shown position or vice versa.
  • the lifting member 9 takes a Position one at which the two ends of the rail 9a are on can be the same height. Since the radius of the circular segment-shaped lifting member 9 and its rail 9a is chosen as large as possible, the height of the lifting member is 9 and thus the total height of the lifting table in the lowered Position relatively small.
  • FIGS. 3 to 5 show a further embodiment of the Invention.
  • the same components are the same Reference symbols as in the exemplary embodiment according to FIGS. 1 and 2 designated.
  • the table top 2 is in the present case raised by two counter-rotating lifting elements 9 or lowered.
  • the two lifting members 9 engage with theirs Roller pairs 14 directly in slots or grooves 25 of the Table top 2 a.
  • the lifting elements interlock like Fig. 5 shows.
  • On the left side of the drawing are the two halves of the lifting member 9 on the outside and right on the inside of table top 2 or Base plate 2 arranged so that when you lower the Lay the table top 2 into one another.
  • the drive of the pinion 13 takes place via worm gear 16 and a common Electric motor 17 with a motor brake.
  • the worm gear 16 are self-locking, so that the table top 2 in any position stops safely.
  • Table top 2 parallel to the base plate 1 at any height performed so that an additional parallel guidance Scissors as in the embodiment of FIGS. 1 and 2 are not is required.
  • the table top 2 could, however Intermediate layers slip in the horizontal direction because then the pairs of rollers 14 stand in the middle of the groove guides 25 and therefore do not give lateral support. for stabilization in the horizontal direction there will be two Constructions according to FIGS. 4 and 6 described.
  • Fig. 4 are on the with the pairs of rollers 14th provided ends of the lifting members 9 two rods 18 articulated, in the area of the center of the table top 2 each in one Pass over rack 19.
  • Fig. 4 in a schematic Shows partial supervision, comb the two racks 19 a freewheel mounted on the table top 1 gear 20 on opposite sides. That way a complete and safe guidance of the table top 2 reached.
  • the lifting member 9 has in the illustrated Embodiments of a table support form with a curved Lower chord and straight upper chord. This design is not binding; it can also have shapes with in or out curved top chord can be selected. Solid wall girders are also possible. Furthermore, the lifting member 9 can still support surfaces have in the working position of the lifting table corresponding support surfaces of the drive cooperate and relief of the tooth flanks or chain links cause.
  • the drive of the gear 13 or the corresponding Sprocket does not need an electric motor directly respectively; it is also possible to use an intermediate gear use that generates the desired movements, e.g. a sinusoidal lifting and lowering movement.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
  • Inorganic Insulating Materials (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Magnetic Heads (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Machine Tool Units (AREA)

Description

Die Erfindung betrifft einen Hubtisch nach dem Oberbegriff des Anspruchs 1.The invention relates to a lifting table according to the Preamble of claim 1.

In einem Prospekt der Expert Maschinenbau GmbH, Nr. 1866 Munkelt 06/84, wird ein Scherenhubtisch nach dem Oberbegriff des Anspruchs 1 gezeigt, dessen Antrieb zwei Ritzel umfaßt, die jeweils in ein bogenförmiges Zahnsegment einzugreifen. Jedes Zahnrad ist konzentrisch zu einem zugehörigen am Grundrahmen befestigten Drehlager für einen zugeordneten Scherenhebel angeordnet und ist mit diesem fest verbunden. Dadurch wird im eingefahrenen Zustand der Scherenhebel eine große minimale Bauhöhe des Scherenhubtisches bedingt.In a brochure from Expert Maschinenbau GmbH, No. 1866 Munkelt 06/84, a scissor lift table after the Preamble of claim 1 shown, the drive two Includes pinions, each in an arcuate tooth segment intervene. Each gear is concentric to one associated pivot bearing attached to the base frame for one assigned scissor lever and is fixed with this connected. This will in the retracted state Scissor lever has a large minimum overall height Scissor lift table conditional.

Das DE-G 92 17 366 beschreibt einen weiteren Hubtisch nach dem Oberbegriff des Anspruchs 1, der an jedem Scherenpaar ein mit dem Scherenarm fest verbundenes halbkreisförmiges Zahnsegment aufweist, das konzentrisch zu dem die Scherenarme verbindenden Drehgelenk angeordnet ist und in das ein Antriebsritzel eingreift. Das halbkreisförmige Zahnsegment bedingt eine große Bauhöhe im eingefahrenen Zustand des Hubtisches.DE-G 92 17 366 describes another lifting table according to the preamble of claim 1, to each Pair of scissors one firmly connected to the scissor arm has semicircular tooth segment that concentrically the pivot joint connecting the scissor arms is arranged and in which a drive pinion engages. The semicircular tooth segment requires a large height in retracted state of the lifting table.

Die DE-B 10 82 023 beschreibt einen Hubtisch, bei dem das Heben und Senken der Tischplatte mit Hilfe eines Tangentialnockens durchgeführt wird, der in einer waagerechten Richtung bewegt wird, wodurch sich eine Grundkreisscheibe mit Hilfe einer Kette parallel zur Tischebene abwälzt und der Tangentialnocken an einer Rolle eines Scherengliedes angreift. Dabei ergibt sich eine ungünstige, wechselnde Hebelübersetzung.DE-B 10 82 023 describes a lifting table in which lifting and lowering the table top with the help of a Tangential cam is carried out in a is moved in the horizontal direction, whereby a Base circle disc with the help of a chain parallel to Rolls the table level and the tangential cam on a roller attacks a scissor link. This results in one unfavorable, changing leverage.

In der US-A 2 201 179 wird ein in einer Bodengrube versenkter Antrieb verwendet, um einen Motor, mehrere Zahnräder und wenigstens ein im wesentlichen halbkreisförmiges Zahnrad, das fest mit dem an einer Schiene befestigten Arm verbunden ist, unterzubringen. Hierbei wird die Schiene in paralleler Ausrichtung nach oben bzw. unten geschwenkt.In US-A 2 201 179 one is in a pit sunken drive used to one motor, several Gears and at least one essentially semicircular gear that is fixed to the one on a rail attached arm is connected to accommodate. Here will the rail in a parallel orientation up or down pivoted.

Hubtische werden auf vielen Gebieten in der industriellen Fertigung, beispielsweise im Fahrzeugbau und auch im Transportwesen verwendet, um Werkstücke oder andere Güter anzuheben und abzusenken. Neben hoher Belastbarkeit, bezogen auf die jeweilige Baugröße, sicherer Parallelführung der Tischplatte auf gewünschte Hubhöhen und einem möglichst ruckfreien Antrieb, kommt es bei solchen Hubtischen auch darauf an, die Bauhöhe im abgesenkten Zustand möglichst klein zu halten, damit am Aufbauort keine besonderen Gruben erforderlich sind.Lift tables are used in many areas in the world industrial production, for example in vehicle construction and also used in transportation to work pieces or others Raise and lower goods. In addition to high resilience, related to the respective size, safe parallel guidance the table top to the desired lifting heights and one if possible jerk-free drive, it also occurs with such lifting tables depends on the height when lowered to keep small, so that no special pits at the installation site required are.

Man kann niedrige Bauhöhen durch Konstruktionen mit hydraulischen Zylindern erzielen (DE-B 10 82 023).You can use low construction heights with constructions achieve hydraulic cylinders (DE-B 10 82 023).

Solche hydraulisch betriebene Hubtische haben den Nachteil, daß Leckölverluste auftreten können, die ein schleichendes Absinken des Hubtisches bewirken. Daher ist eine genaue Positionierung nur schwer möglich. Such hydraulically operated lifting tables have the Disadvantage that leakage oil losses can occur cause the lifting table to drop slowly. thats why precise positioning is difficult.

Der Erfindung liegt daher die Aufgabe zugrunde, einen Hubtisch zu schaffen, der schnelle Hub- und Absenkbewegungen bei kleinem motorischen und konstruktiven Aufwand ermöglicht, im abgesenkten Zustand nur geringe Bauhöhe besitzt und keinen hydraulischen Antrieb benötigt. Die Lösung der Aufgabe ist im Anspruch 1 gekennzeichnet.The invention is therefore based on the object To create the lifting table, the fast lifting and Lowering movements for small motor and constructive Effort allows, in the lowered state only little Height and does not require a hydraulic drive. The solution to the problem is characterized in claim 1.

Das kreissegmentförmige Hubglied kann bei großem Radius trotz niedriger Bauhöhe eine große Bogenlange besitzen, die als Hub- und Regelstrecke vorteilhaft ist und gleichzeitig auf einfache Weise eine hohe Übersetzung ermöglicht, beispielsweise dadurch, daß das Kreissegment als Zahnstange ausgebildet ist, die mit einem angetriebenen Ritzel kämmt. Bei entsprechender Ausbildung des Antriebs, beispielsweise unter Verwendung eines Schneckentriebs, ergibt sich eine Selbsthemmung, so daß der Hubtisch gegen Abstürzen auch bei Energieausfall abgesichert ist. Bei richtiger Auslegung ergibt sich ein günstiges Bewegungsdiagramm, bei dem die Hubbewegung langsam anlauft, dann mit zunehmender Geschwindigkeit erfolgt und schließlich bei Erreichen der maximalen Hubhöhe wieder langsamer wird. Dadurch ist ein schonendes Anheben und Absenken trotz hoher Geschwindigkeit möglich.The circular segment-shaped lifting member can with a large radius have a large arc length despite the low overall height is advantageous as a stroke and controlled system and at the same time enables high translation in a simple way, for example in that the circle segment as a rack is formed, which meshes with a driven pinion. With appropriate training of the drive, for example using a worm drive results in a Self-locking, so that the lifting table also prevents falls Energy failure is secured. With correct interpretation the result is a favorable movement diagram in which the Lift movement starts slowly, then with increasing Speed occurs and finally when the maximum lifting height becomes slower again. This is a gentle lifting and lowering despite high speed possible.

Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche. So kann die Führung des Hubgliedes zwei im Abstand angeordnete, vorzugsweise im Bodenrahmen gelagerte Rollen- oder Walzenpaare umfassen, die eine außen die Kreissegmentfläche enthaltende, kreissegmentförmige Schiene von außen und innen erfassen. Umgekehrt kann die Führung des Hubgliedes auch zwei im Abstand am Hubglied angeordnete Rollen- oder Walzenpaare enthalten, die eine vorzugsweise im Bodenrahmen fest angeordnete, kreissegmentförmige Schiene mit dem gleichen Radius wie das Hubglied von außen und innen erfassen oder als Einzelrollen oder -walzen in einer Nut der Schiene laufen. Developments of the invention are the subject of Subclaims. So the leadership of the lifting member two in Spaced, preferably stored in the floor frame Include pairs of rollers or rollers, one outside the Circle segment-shaped rail containing a segment of a circle capture from outside and inside. Conversely, the leadership of the Lifting member also two spaced on the lifting member Contain pairs of rollers or rollers, one preferably in Floor frame fixed, circular segment-shaped rail with the same radius as the lifting link from outside and inside capture or as single rolls or rolls in a groove of Run rail.

Der Antrieb des Hubgliedes kann auf vielerlei Arten erfolgen. In vorteilhafter Weise sieht eine Weiterbildung der Erfindung jedoch vor, daß der Antrieb mittels wenigstens einer auf der Kreissegmentfläche des Hubgliedes angeordneten Verzahnung und jeweils einem damit kämmenden, vorzugsweise im Bodenrahmen gelagerten und durch einen Motor angetriebenen Ritzel erfolgt. Die Verzahnung kann dabei auch eine Triebstockverzahnung sein. Eine Abwandlung sieht vor, daß der Antrieb mittels wenigstens eienr, auf der Kreissegmentfläche angeordneten Treibkette und jeweils einem, damit kämmenden, vorzugsweise im Bodenrahmen gelagerten und durch einen Motor angetriebenen Kettenrad erfolgt. Die Treibkette kann dabei mit Führungsrollen um das Kettenrad umgelenkt sein und ist am Anfang und Ende des Hubgliedes befestigt.The drive of the lifting member can be done in many ways respectively. A further development is advantageous the invention, however, that the drive by means of at least one arranged on the circular segment surface of the lifting member Gearing and each meshing with it, preferably stored in the floor frame and by a motor driven pinion. The gearing can also be a rack gear. A modification provides that the drive by means of at least one on the Circle segment area arranged drive chain and each one that meshes with it, preferably in the floor frame mounted sprocket and driven by a motor he follows. The drive chain can with guide roles around the Sprocket be deflected and is at the beginning and end of Lifting member attached.

Die Führung der Tischplatte kann in an sich bekannter Weise mit wenigstens einer Schere erfolgen, deren Arme mit einem Ende im Bodenrahmen bzw. am Tisch drehbar gelagert und mit ihrem anderen Ende verschiebbar in einem Schlitz des Tisches bzw. des Bodenrahmens gelagert sind. Es ist zweckmäßig, das eine Ende des Hubgliedes verschiebbar an demjenigen Ende des Scherenarms angreifen zu lassen, der am Tisch drehbar gelagert ist. Dadurch ergibt sich gleichzeitig auch noch eine Übersetzung von der Hubbewegung des Hubgliedes auf die Hubbewegung der Tischplatte.The leadership of the table top can be known in itself Way with at least one pair of scissors, the arms with one end in the floor frame or on the table rotatably and with its other end slidable in a slot of the Table or the floor frame are stored. It is expedient, the one end of the lifting member slidably on to attack the end of the scissor arm that on Table is rotatably mounted. This results at the same time also a translation of the lifting movement of the Lifting member on the lifting movement of the table top.

Die Hubvorrichtung kann in Weiterbildung der Erfindung wenigstens zwei kreissegmentförmige Hubglieder aufweisen, die gegenläufig angeordnet sind und je mit einem Ende an entgegengesetzten Enden der Tischplatte verschiebbar angreifen. Dadurch wird die Hubbewegung direkt auf beide Enden der Tischplatte übertragen, was zu hohem Wirkungsgrad und hoher Stabilität führt. Gleichzeitig wird dadurch eine parallelführung der Tischplatte erzwungen. Die ergänzende Stabilisierung in horizontaler Richtung kann wiederum durch eine oder mehrere Scheren durchgeführt werden. Zudem kann vorgesehen sein, daß die an der Tischplatte angreifenden Enden der Hubglieder über zwei gegenläufige Zahnstangen verbunden sind, die mit einem Zahnrad auf sich gegenüberliegenden Seiten kämmen, das freilaufend an der Tischplatte gelagert ist. Die Zahnstangen verhindern dann, daß sich die Tischplatte bei der Hub- bzw. Absenkbewegung seitlich verschiebt, so daß auch hier eine sichere Führung erfolgt. Statt der Konstruktion mit den gegenläufigen Zahnstangen und dem Zahnrad kann auch eine gespannte umlaufende Kette an der Tischplatte vorgesehen sein, deren oberes Trumm mit dem einen Hubglied und deren unteres Trumm mit dem anderen Hubglied verbunden sind.In a further development of the invention, the lifting device can have at least two circular segment-shaped lifting members, which are arranged in opposite directions and each with one end opposite ends of the table top slidable attack. This will lift the stroke directly onto both Ends of the table top transferred, resulting in high efficiency and high stability. At the same time it becomes a parallel guidance of the table top forced. The complementary Stabilization in the horizontal direction can turn through one or more scissors are performed. It can also be provided that the attacking on the table top Ends of the lifting links via two counter-rotating racks connected with a gear on it comb opposite sides, the free running on the Table top is stored. The racks then prevent that the table top during the lifting or lowering movement moves laterally, so that here too a safe guidance he follows. Instead of the construction with the opposite Racks and the gear can also be cocked revolving chain can be provided on the table top, the upper run with one lifting link and its lower run are connected to the other lifting member.

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen beschrieben. Es zeigen:

  • Fig. 1 die Seitenansicht eines Ausführungsbeispiels für einen Hubtisch nach der Erfindung im angehobenen Zustand;
  • Fig. 2 die Seitenansicht des Hubtisches gemäß Fig. 1 im abgesenkten Zustand;
  • Fig. 3 die Seitenansicht eines weiteren Ausführungsbeispiels im angehobenen Zustand;
  • Fig. 4 eine Einzelheit des Ausführungsbeispiels nach Fig. 3;
  • Fig. 5 eine Aufsicht des Ausführungsbeispiels nach Fig. 3;
  • Fig. 6 eine abgewandelte Einzelheit.
  • The invention is described below using exemplary embodiments. Show it:
  • Figure 1 is a side view of an embodiment of a lifting table according to the invention in the raised state.
  • FIG. 2 shows the side view of the lifting table according to FIG. 1 in the lowered state;
  • 3 shows the side view of a further exemplary embodiment in the raised state;
  • Fig. 4 shows a detail of the embodiment of Fig. 3;
  • Fig. 5 is a plan view of the embodiment of Fig. 3;
  • Fig. 6 shows a modified detail.
  • Der Hubtisch gemäß Fig. 1 und 2 weist einen Bodenrahmen 1 auf. Eine Tischplatte 2 wird an beiden Enden und auf beiden Seiten von zwei Scheren 3 (nur eine ist sichtbar) getragen, die je zwei in der Mitte durch eine Achse 4 verbundene Arme oder Holme 3a und 3b besitzen. Die Holme 3a sind an einem Ende der Tischplatte 2 bei 5 drehbar gelagert und gleiten am anderen Ende in Schlitzen 6 der Bodenplatte 1. Entsprechend sind die anderen Arme oder Holme 3b mit einem Ende bei 7 drehbar in der Bodenplatte 1 gelagert und gleiten am anderen Ende in einem Schlitz 8 der Tischplatte 2.1 and 2 has a floor frame 1 on. A table top 2 is on both ends and on both sides of two scissors 3 (only one is visible) worn, each two in the middle by an axis 4 have connected arms or bars 3a and 3b. The spars 3a are rotatably supported at one end of the table top 2 at 5 and slide in slots 6 of the bottom plate at the other end 1. Accordingly, the other arms or bars 3b are with one end at 7 rotatably mounted in the base plate 1 and slide at the other end in a slot 8 of the table top 2nd

    Das Anheben und Absenken der Tischplatte 2 erfolgt mit einem (von der Seite gesehen) kreissegmentförmigen Hubglied 9, das im Ausführungsbeispiel als Fachwerkträger ausgebildet ist. Je nach Tragkraft kann ein einzelnes "hälftiges" Hubglied 9 vorgesehen sein, das an einer Schere 3 angreift, bevorzugt werden aber zwei gleiche Hubglieder 9 an beiden Scheren 3. Zur Führung der Hubglieder 9 dienen dann insgesamt acht Rollen, von denen zwei Paare in der Zeichnung dargestellt sind, nämlich die im Bodenrahmen 1 im Abstand gelagerten Rollenpaare 10a, 10b und 11a, 11b. Die Rollen 10a, 11a laufen auf der Innenseite von kreisbogenförmigen Schienen 9a des Hubgliedes 9 und die Rollen 10b, 11b auf deren Außenseite. Zusätzlich weist das Hubglied 9 eine Verzahnung 12 auf, in die ein Ritzel 13 eingreift, das gleichachsig mit der Rolle 10b gelagert ist. Das Ritzel wird durch einen Motor (nicht gezeigt), vorzugsweise einen geregelten Elektromotor mit Motorbremse, angetrieben. Am freien oberen Ende (in der Darstellung gemäß Fig. 1) greif das Hubglied 9 mit zwei Rollen 14 (in der Zeichnung hintereinander angeordnet) in die an den Holmen 3a angebrachten Nuten 15 ein.The table top 2 is raised and lowered with a circular segment-shaped lifting element (seen from the side) 9, which is designed as a truss in the exemplary embodiment is. Depending on the load capacity, a single "half" Lifting element 9 can be provided, which acts on a pair of scissors 3, but preferably two identical lifting members 9 on both Scissors 3. Then serve to guide the lifting members 9 a total of eight roles, two of which are couples in the drawing are shown, namely in the bottom frame 1 at a distance stored roller pairs 10a, 10b and 11a, 11b. The roles 10a, 11a run on the inside of circular arcs Rails 9a of the lifting member 9 and the rollers 10b, 11b the outside. In addition, the lifting member 9 has a Toothing 12, in which a pinion 13 engages is mounted coaxially with the roller 10b. The pinion will by a motor (not shown), preferably one regulated electric motor with motor brake, driven. At the free upper end (in the illustration according to FIG. 1) the lifting member 9 with two rollers 14 (in the drawing arranged one behind the other) in the on the bars 3a grooves 15 provided.

    Die Rollenpaare 10a, 10b, 11a, 11b können jeweils durch sogenannte Bogenführungen ersetzt werden, die als Führungselemente Kugeln oder Walzen enthalten und als Bauelemente im Handel erhältlich sind.The pairs of rollers 10a, 10b, 11a, 11b can each by so-called arch guides are replaced, which as Guide elements contain balls or rollers and as Components are commercially available.

    Zum Anheben bzw. Absenken der Tischplatte 2 wird das Hubglied 9 mittels des Ritzels 13 angetrieben und aus der in Fig. 2 dargestellten Position in Richtung der gemäß Fig. 1 gezeigten Stellung verfahren bzw. umgekehrt. In der abgesenkten Position gemäß Fig. 2 nimmt das Hubglied 9 eine Lage ein, bei der die beiden Enden der Schiene 9a sich auf gleicher Höhe befinden können. Da der Radius des kreissegmentförmigen Hubgliedes 9 und seiner Schiene 9a möglichst groß gewählt ist, ist die Höhe des Hubgliedes 9 und damit die Gesamthöhe des Hubtisches in der abgesenkten Position relativ klein.To raise or lower the table top 2 is the Lift member 9 driven by the pinion 13 and from the in 2 shown position in the direction of FIG .. 1 move shown position or vice versa. In the 2, the lifting member 9 takes a Position one at which the two ends of the rail 9a are on can be the same height. Since the radius of the circular segment-shaped lifting member 9 and its rail 9a is chosen as large as possible, the height of the lifting member is 9 and thus the total height of the lifting table in the lowered Position relatively small.

    Fig. 3 bis 5 zeigen ein weiteres Ausführungsbeispiel der Erfindung. Gleiche Bauteile sind mit den gleichen Bezugszeichen wie im Ausführungsbeispiel nach Fig. 1 und 2 bezeichnet. Die Tischplatte 2 wird im vorliegenden Fall durch zwei gegenläufige Hubglieder 9 angehoben bzw. abgesenkt. Dabei greifen die beiden Hubglieder 9 mit ihren Rollenpaaren 14 direkt in Schlitze oder Nuten 25 der Tischplatte 2 ein. Die Hubglieder greifen ineinander wie Fig. 5 zeigt. Auf der in der Zeichnung linken Seite sind die beiden Hälften des Hubgliedes 9 auf der Außenseite und rechts auf der Innenseite der Tischplatte 2 bzw. der Bodenplatte 2 angeordnet, so daß sie beim Absenken der Tischplatte 2 ineinanderliegen. Der Antrieb der Ritzel 13 erfolgt über Schneckengetriebe 16 und einen gemeinsamen Elektromotor 17 mit Motorbremse. Die Schneckengetriebe 16 sind selbstsperrend, so daß die Tischplatte 2 in jeder Lage sicher stehen bleibt.3 to 5 show a further embodiment of the Invention. The same components are the same Reference symbols as in the exemplary embodiment according to FIGS. 1 and 2 designated. The table top 2 is in the present case raised by two counter-rotating lifting elements 9 or lowered. The two lifting members 9 engage with theirs Roller pairs 14 directly in slots or grooves 25 of the Table top 2 a. The lifting elements interlock like Fig. 5 shows. On the left side of the drawing are the two halves of the lifting member 9 on the outside and right on the inside of table top 2 or Base plate 2 arranged so that when you lower the Lay the table top 2 into one another. The drive of the pinion 13 takes place via worm gear 16 and a common Electric motor 17 with a motor brake. The worm gear 16 are self-locking, so that the table top 2 in any position stops safely.

    Durch die synchron angetriebenen Hubglieder 9 wird die Tischplatte 2 in jeder Höhenlage parallel zur Bodenplatte 1 geführt, so daß eine zusätzliche Parallelführung durch Scheren wie beim Ausführungsbeispiel nach Fig. 1 und 2 nicht erforderlich ist. Die Tischplatte 2 könnte jedoch in Zwischenlagen in horizontaler Richtung verrutschen, weil dann die Rollenpaare 14 inmitten der Nutführungen 25 stehen und somit keinen seitlichen Halt geben. zur Stabilisierung in horizontaler Richtung werden nachfolgend zwei Konstruktionen gemäß Fig. 4 und 6 beschrieben.Through the synchronously driven lifting members 9 Table top 2 parallel to the base plate 1 at any height performed so that an additional parallel guidance Scissors as in the embodiment of FIGS. 1 and 2 are not is required. The table top 2 could, however Intermediate layers slip in the horizontal direction because then the pairs of rollers 14 stand in the middle of the groove guides 25 and therefore do not give lateral support. for stabilization in the horizontal direction there will be two Constructions according to FIGS. 4 and 6 described.

    Nach Fig. 4 sind an den mit den Rollenpaaren 14 versehenen Enden der Hubglieder 9 zwei Stangen 18 angelenkt, die im Bereich der Mitte der Tischplatte 2 jeweils in eine Zahnstange 19 übergehen. Wie Fig. 4 in einer schematischen Teilaufsicht zeigt, kämmen die beiden Zahnstangen 19 mit einem freilaufend an der Tischplatte 1 gelagerten Zahnrad 20 auf sich gegenüberliegenden Seiten. Auf diese Weise wird eine vollständige und sichere Führung der Tischplatte 2 erreicht.4 are on the with the pairs of rollers 14th provided ends of the lifting members 9 two rods 18 articulated, in the area of the center of the table top 2 each in one Pass over rack 19. As Fig. 4 in a schematic Shows partial supervision, comb the two racks 19 a freewheel mounted on the table top 1 gear 20 on opposite sides. That way a complete and safe guidance of the table top 2 reached.

    Bei der Konstruktion nach Fig. 6 sind an der Tischplatte 2 zwei Kettenräder 21 gelagert, über die eine umlaufende Kette 22 gespannt ist. Das links dargestellte Hubglied 9 ist mit dem oberen Trumm der Kette 22 bei 23 verbunden und das rechte Hubglied 9 mit dem unteren Trumm der Kette 22 bei 24. Wenn die Tischplatte 2 nach rechts gestoßen wird, wird die Bewegung nach rechts durch den gespannten oberen Trumm der Kette 22 verhindert, und wenn ein Anstoß nach links erfolgt, spannt sich der untere Trumm und verhindert die Bewegung.6 are on the table top 2 two sprockets 21 mounted, one rotating Chain 22 is tensioned. The lifting member 9 shown on the left is connected to the upper run of the chain 22 at 23 and that right lifting link 9 with the lower run of the chain 22 at 24. If the table top 2 is pushed to the right, the Movement to the right through the tense upper run Chain 22 prevented, and if a push is made to the left, the lower run tightens and prevents movement.

    Das Hubglied 9 weist in den dargestellten Ausführungsbeispielen eine Tischträgerform mit gekrümmtem Untergurt und geradem Obergurt auf. Diese Gestaltung ist nicht bindend; es können auch Formen mit ein- oder auswärts gekrümmtem Obergurt gewählt werden. Auch Vollwandträger sind möglich. Ferner kann das Hubglied 9 noch Stützflächen aufweisen, die in der Arbeitsstellung des Hubtisches mit entsprechenden Stützflächen des Antriebs zusammenwirken und eine Entlastung der Zahnflanken bzw. der Kettenglieder bewirken.The lifting member 9 has in the illustrated Embodiments of a table support form with a curved Lower chord and straight upper chord. This design is not binding; it can also have shapes with in or out curved top chord can be selected. Solid wall girders are also possible. Furthermore, the lifting member 9 can still support surfaces have in the working position of the lifting table corresponding support surfaces of the drive cooperate and relief of the tooth flanks or chain links cause.

    Der Antrieb des Zahnrades 13 bzw. des entsprechenden Kettenrades braucht nicht direkt über einen Elektromotor erfolgen; es ist auch möglich, ein Zwischengetriebe zu benutzen, das gewünschte Bewegungsabläufe erzeugt, z.B. eine sinusförmige Hub- und Senkbewegung.The drive of the gear 13 or the corresponding Sprocket does not need an electric motor directly respectively; it is also possible to use an intermediate gear use that generates the desired movements, e.g. a sinusoidal lifting and lowering movement.

    Claims (16)

    1. An elevating table having the following features:
      a base frame (1),
      a tabletop (2),
      a parallel guidance system for the tabletop,
      an elevating mechanism in order to move the base frame (1) and the tabletop (2) relatively to one another;
      the elevating mechanism comprises at least one elevating member (9) in the form of a segment of a circle provided with drive formations (12) along an arc (9a);
      a drive (13) for driving the at least one elevating member (9),
      characterised by the following features:
      guide means (10a, 10b; 11a, 11b) are disposed along an arcuate guide track (9a) corresponding to the arc of the at least one elevating member (9) and are mounted on the base frame (1) or on the elevating member (9) so that the at least one elevating member (9) is disposed to be movable along the associated guide track (9a);
      the at least one elevating member (9) is displaceable into required positions along said guide track (9a) by means of the drive (13);
      the at least one elevating member (9) bears on the one hand by its drive formations (12) against the drive (13) and on the other hand supports the tabletop (2) directly or indirectly in order to carry or lift loads resting thereon.
    2. An elevating table according to claim 1, characterised in that the guide means (10a, 10b, 11a, 11b) comprise at least two roller or drum pairs.
    3. An elevating table according to claim 1, characterised in that the guide means (10a, 10b; 11a, 11b) comprise tracks in the form of a segment of a circle corresponding to the arc of the at least one elevating member (9), and in that rollers or drums are disposed on the elevating member (9) and co-operate with the tracks.
    4. An elevating table according to claim 1, characterised in that the guide means (10a, 10b; 11a, 11b) are constructed as an arcuate guide each having a plurality of rollers or balls.
    5. An elevating table according to any one of claims 1 to 4, characterised in that the drive (13) comprises a pinion which engages in the drive formations of the at least one arcuate elevating member (9).
    6. An elevating table according to claim 5, characterised in that the drive formations comprise a toothing (12).
    7. An elevating table according to claim 5, characterised in that the drive formations comprise a chain or a pin tooth system.
    8. An elevating table according to claim 7, characterised in that the chain is deflected with guide rollers around the pinion as a chain wheel and is fixed at the beginning and end of the at least one elevating member (9).
    9. An elevating table according to any one of claims 1 to 8, characterised in that the drive of the at least one elevating member (9) comprises a linear actuator (hydraulic cylinder, screw spindle).
    10. An elevating table according to any one of claims 1 to 9, characterised in that the parallel guidance system for the tabletop (2) comprises a scissors (3).
    11. An elevating table according to claim 10, characterised in that at least one member (3a) of the scissors comprises a longitudinal guide (15) in which there engages an engagement element (14) secured to the at least one elevating member (9), for the purpose of driving the scissors (3).
    12. An elevating table according to any one of claims 1 to 11, characterised in that the or each elevating member (9) is disposed only on one side of the scissors (3) i.e. at the side at which the scissors members (3a, 3b) are fixed pivotally on the base frame (1) and on the tabletop (2).
    13. An elevating table according to any one of claims 1 to 9, characterised in that the parallel guide for the tabletop (2) is formed by at least two elevating members (9) each drivable in opposite directions along associated arcuate guide tracks (9a) and having respectively at one of their ends an engagement guide element (14) which elements engage in corresponding longitudinal guides (25) of the tabletop (2) in order to drive the latter.
    14. An elevating table according to claim 13, characterised in that the top ends of the elevating members (9) are connected via two opposed racks (19) which mesh with a gearwheel (20) on opposite sides, the gearwheel being mounted for free running on the tabletop (2).
    15. An elevating table according to claim 13, characterised in that a tensioned revolving chain (22) is provided on the tabletop (2) and in that the respective top ends of the two elevating members (9) are connected to the top and bottom runs respectively of the revolving chain (22).
    16. An elevating table according to any one of claims 1 to 10, characterised in that the at least one elevating member (9) in the form of a segment of a circle is constructed as a lattice girder, the chord length of the elevating member (9) comprising at least one-third of the minimum length of the base frame (1).
    EP95115101A 1994-09-28 1995-09-26 Lifting platform Expired - Lifetime EP0704404B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE9415656U 1994-09-28
    DE9415656U DE9415656U1 (en) 1994-09-28 1994-09-28 Lift table

    Publications (2)

    Publication Number Publication Date
    EP0704404A1 EP0704404A1 (en) 1996-04-03
    EP0704404B1 true EP0704404B1 (en) 1998-12-23

    Family

    ID=6914236

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95115101A Expired - Lifetime EP0704404B1 (en) 1994-09-28 1995-09-26 Lifting platform

    Country Status (3)

    Country Link
    EP (1) EP0704404B1 (en)
    DE (2) DE9415656U1 (en)
    ES (1) ES2126825T3 (en)

    Families Citing this family (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE29607020U1 (en) * 1996-04-18 1996-08-14 Expert Maschinenbau Gmbh, 64653 Lorsch Scissor lift table
    US9296596B2 (en) * 2012-10-15 2016-03-29 Cameron Lanning Cormack Hybrid wedge jack/scissor lift lifting apparatus and method of operation thereof
    CN106144942B (en) * 2015-04-10 2018-11-23 深圳市裕展精密科技有限公司 Lifting body
    CN107176540B (en) * 2017-06-06 2018-07-13 北京航天发射技术研究所 A kind of docking facilities for large-tonnage cargo transfer
    WO2019153086A1 (en) * 2018-02-07 2019-08-15 Terracube International Inc. Lift table and method of use

    Family Cites Families (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US2201179A (en) * 1938-11-26 1940-05-21 Makaroff Automobile lift
    CH234846A (en) * 1941-02-20 1944-10-31 Otto Dr Becker Alfred Lifting device.
    DE1082023B (en) * 1958-12-06 1960-05-19 Ingo Trepel Lifting table with Nuernberger scissors
    SE302277B (en) * 1967-04-24 1968-07-15 Atlas Copco Ab
    FR1524844A (en) * 1967-05-30 1968-05-10 J E Greiner Company Method and apparatus for the garage of airplanes in airports
    FR2281310A1 (en) * 1974-08-05 1976-03-05 Thaon Maurice Scissors-type lifting platform actuator - has cam to produce traction between fixed points inside scissors folded flat
    GB1487119A (en) * 1975-05-21 1977-09-28 Hydraulmekano Ab Lifting devices
    DD252814A1 (en) * 1986-09-29 1987-12-30 Smab Forsch Entw Rat Scissor
    DE9217366U1 (en) * 1992-12-18 1994-01-27 Wegmann & Co Gmbh, 34127 Kassel Scissor lift table
    DE9406480U1 (en) * 1994-04-15 1994-06-16 Laweco-Maschinen- und Apparatebau GmbH, 32339 Espelkamp Scissor lift table

    Also Published As

    Publication number Publication date
    DE59504620D1 (en) 1999-02-04
    DE9415656U1 (en) 1994-11-17
    EP0704404A1 (en) 1996-04-03
    ES2126825T3 (en) 1999-04-01

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