EP1772417A2 - Table élévatrice - Google Patents

Table élévatrice Download PDF

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Publication number
EP1772417A2
EP1772417A2 EP06017505A EP06017505A EP1772417A2 EP 1772417 A2 EP1772417 A2 EP 1772417A2 EP 06017505 A EP06017505 A EP 06017505A EP 06017505 A EP06017505 A EP 06017505A EP 1772417 A2 EP1772417 A2 EP 1772417A2
Authority
EP
European Patent Office
Prior art keywords
lifting table
table according
profile
profile element
profile elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06017505A
Other languages
German (de)
English (en)
Other versions
EP1772417B1 (fr
EP1772417A3 (fr
Inventor
Josef Ezechias
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.)
Eisenmann Anlagenbau GmbH and Co KG
Original Assignee
Eisenmann Anlagenbau GmbH and Co KG
Eisenmann Foerdertechnik 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 Eisenmann Anlagenbau GmbH and Co KG, Eisenmann Foerdertechnik GmbH and Co KG filed Critical Eisenmann Anlagenbau GmbH and Co KG
Publication of EP1772417A2 publication Critical patent/EP1772417A2/fr
Publication of EP1772417A3 publication Critical patent/EP1772417A3/fr
Application granted granted Critical
Publication of EP1772417B1 publication Critical patent/EP1772417B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, 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
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0633—Mechanical arrangements not covered by the following subgroups

Definitions

  • Lifting tables of this type are known in various designs in industrial conveying and manufacturing technology; they generally serve to move a load from one height level to another height level.
  • lifting tables are used to introduce bodies into treatment stations and to remove them from them.
  • the introduction can be done by lowering, for example, in a bath, and the removal by lifting, so escape from the bath.
  • the introduction can also include a lifting movement, for example, when introduced into a dryer, and a lowering movement during deployment. Lifting movements are also often necessary when transferring from one conveyor to another.
  • Object of the present invention is to design a lifting table of the type mentioned so that the force is generally under more favorable geometric conditions and the costs are lower.
  • the invention takes advantage of the fact that elastically deformable profile elements which have a suitable initial shape, are deformed by application of a lateral force so that their perpendicular to the direction of force dimension is increased. Taking away the external force, the profile element returns elastically to its original shape.
  • Such elastically deformable profile elements can be comparatively inexpensive, for example made of fiber-reinforced plastic but also of metal, especially steel.
  • the horizontal driving forces are more favorably converted into the vertical movement of the upper structure than is the case with the known scissor or eccentric lifting tables.
  • the hub according to the invention lifting tables is - compared with scissor lift tables - from home not too big.
  • this disadvantage can readily be accepted in many applications, especially since there are measures that can lead to an increase in the stroke and are explained in detail below.
  • the power source may comprise a motor and a horizontally extending threaded spindle driven by the latter and a threaded nut which can be screwed onto the threaded spindle and which is in frictional connection with a lateral region of a profile element.
  • This type of power source is used where exerted on the lateral region of the profile element forces in both directions, ie tensile and compressive forces should be.
  • the power source may comprise a motor and a drum driven by it, on which a flexible traction means connected to a lateral region of a profile element, for example a rope, can be wound up, which extends horizontally at least in the region adjacent to the profile element.
  • a flexible traction means connected to a lateral region of a profile element, for example a rope, can be wound up, which extends horizontally at least in the region adjacent to the profile element.
  • the drive via a flexible traction means is even more cost-effective, space-saving and variable than that via a threaded spindle.
  • the flexible traction means for multiplying the force can also be guided flaschenzugartig.
  • the force which serves to elastically deform the profile element or elements is introduced on one side on a lateral region of a profile element.
  • this one-sided nature of the introduction of force has the consequence that the upper structure at the same time moved horizontally in their vertical movement to some extent. This is easily acceptable in many cases.
  • a horizontal movement of the upper structure occurring simultaneously with the vertical movement can be avoided by virtue of the fact that the force can be introduced on both sides at two opposite lateral regions of the same profile element or different profile elements.
  • At least two profile elements can be arranged side by side. In this way, relatively flat but large lift tables can be achieved.
  • adjacent profile elements can abut directly against one another with lateral regions.
  • This design is chosen when a maximum surface load is to be achieved for a given area of the top structure.
  • adjacent profile elements may have a lateral distance from each other.
  • adjacent profile elements may be connected to each other by at least one force-transmitting spacer.
  • At least one area of at least one profile element is preferably immovably connected to the substructure and / or the upper structure.
  • Such a type of connection can serve to define the position of the connecting structure between the substructure and the upper structure, ie to ensure that the entire connecting structure does not shift during a lateral application of force.
  • An immovable attachment of a lateral region of a profile element can also make sense where several profile elements are used side by side, but not adjacent to each other and are not connected to each other via a separate force transmitting spacer.
  • the reaction force on the lateral, deforming force is introduced in this case via the non-displaceable edge region of the profile element in the top or bottom structure.
  • the hub which can be reached with a lifting table according to the invention, can be increased by the fact that at least two profile elements are arranged one above the other. In this case, add the strokes that are achievable with each of the superposed profile elements.
  • the superimposed profile elements can be arranged either in the same direction or in opposite directions.
  • the term "in the same direction” is understood to mean the same orientation of the two profile elements in space, while in an opposing arrangement of the profile elements is rotated by 180 °, so that its top is the bottom.
  • the lift table may be composed of two superimposed sub-lift tables, each of which has a sub-structure, a connection structure and a top structure.
  • This embodiment of the invention allows a modular assembly of a lifting table depending on the desired stroke size of a plurality of identically constructed Unterhubtica, which are basically all functional on their own. It is possible that all "Schhubtician” are operated synchronously in the "total lift" by one and the same power source; Alternatively, it is also conceivable that different Unterhubtician separated by separate Power sources are actuated.
  • At least one profile element at an upper or lower vertex area, with which it bears against the substructure or on the upper structure or at the vertex area of another profile element is provided with a rib-like projection which forms a flat bearing surface.
  • the rib-like projection can also be a separate, subsequently connected to the profile element part, which consists of a low-friction plastic.
  • At least two profile elements may be provided at their lateral, abutting areas with a rib-like projection which forms a planar contact surface.
  • At least one profile element is open on one side.
  • “unilaterally open” is meant here a profile shape having free edges on the bottom or top.
  • Examples of such “unilaterally open” profile elements are those which have the shape of a circular cylinder partial jacket surface or are shaped like a roof.
  • this at least one edge of the profile element is fixed in a component which is guided displaceably along the substructure or upper structure.
  • connection structure relatively small, modular components composable components can be used. In individual cases, however, it may be cheaper if at least two profile elements are integrally connected to each other. This design principle can be carried so far that eventually the entire connection structure is integral.
  • the at least one profile element can also be designed like a tube. To lift the upper structure of this hose-like profile element is effectively "squeezed" in the horizontal direction.
  • Tubular profile elements used in the present invention may be open at opposite ends. This makes it possible that the trapped in the interior of the profile element air escapes during the deformation of the profile element and in this way has no influence on the deformation properties of the profile element.
  • tubular profile element is closed all around.
  • the air contained in the profile element is thus locked, so that it must be compressed, for example, at a caused by the deformation volume reduction. It contributes in this way to the deformation characteristics of the profile element and can, for example affect the load capacity of the entire lift table.
  • the effect exerted by the trapped air volume on the deformation characteristic can be changed in one embodiment of the invention in that the pressure of the trapped gas in the profile element is adjustable.
  • the profile element contains at least a variation of its wall thickness. Relatively thin areas of the wall of the profiled element are easier to deform than adjacent, thicker areas.
  • One possible application of this principle is to introduce so-called "thin-layer hinges" around which two adjacent regions of the profile element can perform a type of rotary movement.
  • FIG. 1a a lifting table is shown in a schematic manner, which is generally designated by the reference numeral 1 and is intended primarily for lifting and lowering heavy loads with a small stroke.
  • this lifting table 1 also comprises a substructure 2 which can be fastened to a floor or another supporting structure, a load-bearing upper structure 3 and a connecting structure 4 arranged between the substructure 2 and the upper structure 3.
  • the substructure 2 has in the illustrated embodiment, two parallel C-beams 2a, 2b, while the upper structure 3 as a flat support plate with double-folded longitudinal edges 3a, 3b is configured.
  • the connecting structure 4 in turn comprises three shell-shaped profile elements 5, which in the in Fig. 1b illustrated, relaxed state represent the shape of rectangular sections of a circular cylindrical surface with relatively large radius.
  • the axes belonging to the cylinder jacket surfaces run perpendicular to the extension direction of the two parallel profile carriers 2a, 2b.
  • the axially parallel edges of the profile elements 5 are each secured in a manner which will be described below with reference to FIG 2, in a bar 8, which is guided with its opposite ends respectively in the two profile beams 2a, 2b slidably. If it is to be prevented that the overall arrangement of the profile elements 5 and the strips 8 can move along the profile beams 2a and 2b, one or two adjacent strips 8 can also be fixed to the profile rails 2a, 2b. In the following, it is assumed that the strip 8 on the left-most side of FIG. 1b is fastened to the profile carriers 2a, 2b, for example screwed on.
  • a respective rib-shaped projection 14 is integrally formed with a flat bearing surface. If the upper structure 3 is simply placed on the support surfaces of the projections 14, the result is the compact image of the lifting table 1 shown in FIG. 1 a.
  • the profile elements 5 are made of elastic material, for example made of sheet steel, but preferably made of fiber-reinforced plastic. If the force represented by the arrow 25 in FIG. 1b is removed, the profile elements 5 therefore relax again and are returned to the position shown in FIGS. 1a and 1b with displacement of the movable strips 8 and the upper structure 3. The elastic forces acting in the profile elements 5 cooperate with the weight forces resulting from the load and the upper structure 3 itself.
  • the abutment surfaces of the rib-like projections 14 do not all move laterally (horizontally) to the same extent between the retracted position of the lifting table 1 of Figures 1a and 1b and the extended position of Figures 1c and 1d, it is by appropriate materials or other means ensured that the contact surfaces of the rib-like projections 14 can slide smoothly along the underside of the upper structure 3 along.
  • the least moving projection 14 can be fixed to the upper structure 3.
  • FIG. 2 shows how two adjacent Profile elements 5 - , 5 'with their adjacent longitudinal edges on two strips 8, 8' are fixed.
  • Each profile element 5, 5 ' has for this purpose at its longitudinal edges in cross-section annular fixing ribs 17, 17', which in cross-sectionally semicircular grooves 19, 19 'of the two strips 8, 8' are inserted.
  • the fastening ribs 17, 17' rotate like an angel in the associated grooves 19, 19 'of the strips 8, 8'. In this way, excessive local deformations and forces in the region of the edges of the profile elements 5 are avoided.
  • the advantage of this type of force introduction is that the upper structure 3 does not move substantially parallel to the profile carriers 2a, 2b (lateral); it can then even be attached to the rib-like projection 14 of the central profile element 5. Here, in this case, no relative movement takes place between the upper structure 3 and the profile element 5.
  • the number of profile elements 5, which is used in a particular lifting table 1 is not limited. In individual cases, a single lifting element 5 may be sufficient. In the case of large lifting tables 1, a large number of profile elements 5 can also be used.
  • FIG. 3 shows an exemplary embodiment of a lifting table that largely resembles that described above with reference to FIGS. 1a to 1d. Corresponding parts are therefore identified by the same reference numeral plus 100.
  • a substructure 102 which is designed here as a plate, as well as an upper structure 103, which is likewise designed as a plate.
  • the connecting structure 104 here comprises only two shell-shaped, downwardly open profile elements 105, whose longitudinal edges parallel to the axes of the circular cylinder lateral surfaces are each fastened in a strip 108.
  • the attachment is done in the same manner as described above with reference to FIG 2.
  • the strips 108 are, with one exception, which will be discussed below, slidably guided on the floor structure 102 in a manner not further explained perpendicular to its longitudinal extension.
  • connection structure 104 of the embodiment of Figure 3 has two rigid spacers in the form of rods 121 which are inserted between the mutually facing inner strips 8 of the two profile elements 105.
  • the bar leftmost in FIG. 3 is again intended to be stationary. If force is now applied in the direction of the arrow 125 on the strip 108 on the far right in FIG. 3, then the two profile elements 105 deform, as in FIG. 1, by reducing the radius of curvature and by raising their apex lines and the upper structure 103 resting on them extended position of the lifting table 101 is shown in Figures 3c and 3d, which probably require no further explanation.
  • the lifting tables 1 and 101 shown in Figures 1 to 3 can understandably only achieve a relatively small stroke. An enlargement of this stroke is possible in that simply several such lifting tables 1 and 101 are superimposed and form in this way a new lifting table 201, as shown in Figures 4a to 4d.
  • the lifting table 201 consists in this case of two "Schhubtica" 101, 101 'of the type shown in Figure 3, wherein the substructure of the upper lifting table 101 is placed on the upper structure of the lower lifting table 101'.
  • the two Unterhubtician 101, 101 ' can be operated either simultaneously from the same power source or by independent power sources.
  • the maximum stroke of the lifting table 201 corresponds to the sum of the strokes of the individual sub-lift tables 101, 101 '.
  • FIG. 3 Another way of assembling two sub-lifting tables 101, 101 'of the type shown in FIG. 3 into a lifting table 301 is shown in FIG.
  • the total stroke of the lift table 301 is equal to the sum of the strokes of the two sub-lift tables 101, 101 '.
  • the sub-lift tables 101, 101 ' can be actuated either by a common power source synchronously or independently by separate power sources.
  • a plurality of elastically deformable profile elements 405, 405 'in pairs to increase the total stroke are arranged one above the other.
  • the lifting table 401 is not a complete multiplication of a "sub-lift table”. Rather, here are each in pairs abutting, designed as a part cylinder jacket surfaces profile elements 305, 305 'oppositely applied directly to each other, such that each of the lower profile element 405' downwardly open and the upper profile element 405 is open at the top.
  • the mutual contact of the profile elements 405, 405 'takes place via the rib-like projections 414, 414' along the apex lines.
  • the respective inner, parallel to the axis of Operazyindermantel vomiton extending longitudinal edges of the profile elements 405, 405 ' are a thin point, which acts as a hinge, integral with a formed on the substructure 402 and upper structure 403, parallel to these edges extending rib 409, 409' attached.
  • this construction is such that by applying force to the actuating plates 422, 423, the outer longitudinal edges of the profile elements 405, 405 'are guided inwardly, thereby deforming the profile elements 405, 405' and their respective apex line a greater distance from the adjacent one Substructure 402 or upper structure 403 receives.
  • the connecting structure 504 arranged between the substructure 502 and the upper structure 503 consists of a multiplicity of tube-like profile elements 505 arranged in a hose-like manner parallel to each other and adjoining one another.
  • Each of these profile elements 505 can be made as one of two shell-shaped profile elements composed as shown in Figures 1 to 3.
  • the elastic profile elements 505 In the "retracted" state of the lifting table 501, as shown in Figures 5a and 5b, the elastic profile elements 505 have a substantially elliptical cross-section, wherein the longer major axis is arranged horizontally, ie parallel to the substructure 502 and the upper structure 503. Along the apex lines, which are assigned to the short ellipse axes, in turn extend rib-like projections 514, 514 ', on which in each case the substructure 502 and the upper structure 503 is applied.
  • the state shown in FIGS. 7a and 7b arises from the state shown in FIGS. 7c and 7d.
  • the tubular profile elements 505 again have an elliptical cross-section, after they have passed through an intermediate state in which the cross-section was approximately circular.
  • FIGS. 7c, 7d near the end of the stroke of the upper structure 502, the longer ellipse axis of the cross-section of the profile elements 505 extends vertically and the shorter ellipse axis horizontally.
  • the profile elements 505 thus move closer to one another and become narrower.
  • the end faces of the tubular profile elements 505 are open, so that the air trapped in its interior can escape during the deformation. in principle However, it is also possible to close these end faces, which has an influence on the "stiffness" and the carrying capacity of the profile elements 505. Possibly. it is also possible to make the pressure of the gas, for example the air, within the closed profile elements 505 adjustable. However, this adjustable pressure is not to be confused with the pressure, which serves for example for inflating a bellows-like lifting device. In the present invention, during the actual operation of the lift table, the trapped amount of gas is not changed by the supply or discharge of gas; the lifting movement takes place exclusively due to the deformation of the profile elements by a force acting in the lateral direction.
  • connection structure 604 consists of a plurality of hose-like, abutting elastic profile elements 605, on its underside via a rib-like projection 614 'on the substructure 602 and abut at the top in each case via a rib-like projection 614 on the upper structure 603.
  • the cross-section of profile elements 605 is not strictly elliptical; rather, it can be thought of as being composed in one piece of two shell-shaped sub-elements forming part-cylinder jacket surfaces which correspond to those of FIGS. 1 and 2.
  • These sub-elements are now connected to each other at their longitudinal edges via thin-point hinges that open when lifting the upper structure 603, as shown in Figures 8c and 8d, and close when lowering the upper structure 603 according to Figures 8a and 8b.
  • This embodiment in turn has the advantage that when extending and retracting the lifting table 601 in the vicinity of the lateral apex lines of the profile elements 605 do not form high local deformations and thus stresses.
  • FIG. 9 The illustrated in Figure 9 embodiment of a lifting table 701 is very similar to that which has been described above with reference to Figures 1 to 2. It differs from the latter essentially only by the nature of the profile elements which form the connection structure 704. The differences are essentially as follows:
  • the connecting structure 704 comprises only a single, one-piece profile part. This, in turn, consists of three sub-profiles 705 integrally connected to adjacent edges.
  • the sub-profiles 705 have a substantially roof shape with two approximately flat legs, which form an angle at a "roof ridge". Since the lower joints between adjacent sub-profiles 705 have the same geometry as the above-mentioned "ridge" of the sub-profiles 705, the distinction in sub-profiles is somewhat arbitrary;
  • the connection structure 704 can also be understood as a zigzag between the substructure 702 and the upper structure 703 extending profile element.
  • the individual approximately flat legs of the connecting structure 704 are connected to each other via formed by grooves, acting like a hinge thin points.
  • the legs of the connecting structure 704 remain substantially flat. It essentially changes only the angle enclosed by adjacent legs, which is greater in the "retracted" state of the lifting table 701 than in the extended state.
  • FIG. 10 shows in a realistic manner how a lifting table 801 according to the invention can be used in practice as a sliding table.
  • the lifting table 801 is very similar in its basic construction to the exemplary embodiment of FIGS. 1 and 2. This means that the lifting table 801 has a substructure 802 consisting of two parallel profile carriers 202a and 202b (only the front profile carrier 202a can be seen in FIG ).
  • the axes of rotation of the rollers 841 are perpendicular to the plane of the figure 10. Objects placed on the rollers 841 can therefore be moved to the left or right by rotating the rollers 841 in FIG.
  • the rollers 841 are driven by a geared motor 842 and various belts in a known manner.
  • edges of the three shell-shaped elastic profile elements 805 running parallel to the axis of the partial cylinder jacket surface are "knotted” again in strips 808, as shown in FIG.
  • the leftmost strip 808 in FIG. 10 is fixed, while all the other strips 808 are displaceably guided parallel to themselves in FIG. 10 along the profile carrier 802a.
  • the electric motor 843 drives a threaded spindle 844, which extends parallel to the profile carriers 802a, 802b, between them, and is rotatably mounted at its free end in a bearing block 845.
  • On this threaded spindle 844 runs a nut 846, which is connected to the in FIG. 10 rightmost strip 808.
  • the entire lifting table 801 is arranged between two roller strips 850 running parallel to one another, perpendicular to the drawing plane of FIG.
  • Each of these roller strips 850 comprises on its upper side a multiplicity of rollers 852 arranged at a distance from one another and drivable in a known manner.
  • roller bars 850 and lifting table 801 shown in FIG. 10 functions as follows:
  • the electric motor 843 is put into operation.
  • the nut 848 is moved to the left in Figure 10; the strip 808 lying furthest to the right in FIG. 10 is taken along by the nut 848, so that the profile elements 805 are deformed in the manner explained above with reference to FIGS. 1 and 2.
  • the upper structure 803 is raised until the rollers 841 abut against the underside of the object and, finally, during the further vertical movement of the upper structure 803 lift this object from the rollers 852 of the roller strips 850.
  • the electric motor 842 can be energized in the desired direction so that the rollers 841 transport the article in Fig. 10 right or left to another conveyor system or to a processing station.
  • the various profile elements were integrally connected to the rib-like projections, which provide flat contact or bearing surfaces.
  • the rib-like projection 914 used here is a separately manufactured part, which consists of low-friction plastic and was subsequently connected to the rest of the profile element 905.
  • the choice of material for the profile element 105 can then be made exclusively in terms of elasticity, bending resistance and mechanical Stabiltreli.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Geology (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Invalid Beds And Related Equipment (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Machine Tool Units (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
EP06017505A 2005-10-04 2006-08-23 Table élévatrice Expired - Fee Related EP1772417B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005047486A DE102005047486B4 (de) 2005-10-04 2005-10-04 Hubtisch

Publications (3)

Publication Number Publication Date
EP1772417A2 true EP1772417A2 (fr) 2007-04-11
EP1772417A3 EP1772417A3 (fr) 2009-01-21
EP1772417B1 EP1772417B1 (fr) 2010-10-13

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EP06017505A Expired - Fee Related EP1772417B1 (fr) 2005-10-04 2006-08-23 Table élévatrice

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US (1) US20080011555A1 (fr)
EP (1) EP1772417B1 (fr)
DE (2) DE102005047486B4 (fr)

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CN104773675A (zh) * 2015-04-08 2015-07-15 赛埃孚汽车保修设备（太仓）有限公司 单柱汽车举升机的长效耐用托臂

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EP2829690A1 (fr) * 2013-07-23 2015-01-28 Alstom Technology Ltd Ensemble de maintenance pouvant s'adapter à l'intérieur d'un moteur à turbine à gaz

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EP1772417B1 (fr) 2010-10-13
US20080011555A1 (en) 2008-01-17
DE502006008067D1 (de) 2010-11-25
DE102005047486A1 (de) 2007-04-12
DE102005047486B4 (de) 2007-06-14
EP1772417A3 (fr) 2009-01-21

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