EP4019450A1 - Contrepoids - Google Patents

Contrepoids Download PDF

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Publication number
EP4019450A1
EP4019450A1 EP20216373.9A EP20216373A EP4019450A1 EP 4019450 A1 EP4019450 A1 EP 4019450A1 EP 20216373 A EP20216373 A EP 20216373A EP 4019450 A1 EP4019450 A1 EP 4019450A1
Authority
EP
European Patent Office
Prior art keywords
support column
counterweight
weight block
weight
holding 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.)
Withdrawn
Application number
EP20216373.9A
Other languages
German (de)
English (en)
Inventor
Romeo LO JACONO
Vikas Shinde
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.)
Inventio AG
Original Assignee
Inventio AG
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 Inventio AG filed Critical Inventio AG
Priority to EP20216373.9A priority Critical patent/EP4019450A1/fr
Publication of EP4019450A1 publication Critical patent/EP4019450A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B17/00—Hoistway equipment
    • B66B17/12—Counterpoises

Definitions

  • the present invention relates to a counterweight and a method of constructing a counterweight.
  • an elevator car In an elevator system, an elevator car is usually moved vertically along a travel path between different floors or levels within a building. At least in tall buildings, a type of elevator is usually used in which the elevator car is held by rope-like or belt-like suspension means and is displaced within an elevator shaft by moving the suspension means by means of a drive machine. In order to at least partially compensate for the load of the elevator car to be moved by the drive machine, at least one counterweight is fastened to an opposite end of the suspension means. Depending on the elevator type, multiple counterweights and/or multiple elevator cars can also be provided in an elevator installation. The mass of all counterweights typically has at least the same mass as the elevator car. As a rule, the mass of all counterweights together exceeds that of the elevator car by half the payload that can be transported by the elevator car.
  • Conventional counterweights have a frame structure into which individual weight blocks are inserted. These weight stacks are often made of steel and/or concrete.
  • a counterweight is shown in the registration WO2020127303 .
  • the weight blocks are stacked vertically on top of each other and held by a frame structure.
  • the frame structure already has the full dimensions of the counterweight when it is delivered to the construction site and is therefore difficult to transport into the shaft.
  • the frame structure of such a counterweight could also only be assembled in the shaft. However, this is very complex.
  • a counterweight for an elevator installation solves the problem.
  • the counterweight for an elevator system has a support column and a first weight block.
  • the support column has a suspension device for the counterweight at one end area and the first weight block is held by a holding element.
  • the direction of longest extension of the first weight block is parallel to the direction of longest extension of the support column.
  • the counterweight shown here has a slim support column that can be easily transported down an elevator shaft.
  • the support column is preferably an essentially square hollow profile.
  • the cross section of the hollow profile has edge lengths of 5 cm to 30 cm, preferably 15 cm to 20 cm. Due to this slim design, the support column can therefore be easily stacked and transported. In particular, transport through narrow doors or stairwells is possible, so that the support column can be easily transported into the shaft.
  • the support column is preferably made of steel.
  • the support column is erected in the elevator shaft. This means that the support column is aligned vertically and is preferably guided by a rail.
  • the support column has guide shoes for this purpose. For example, two guide shoes that are spaced apart from one another along the main extension direction can align the support column parallel to the rail. As a result, the direction of the longest extension of the support column runs vertically.
  • the support column is secured against displacement so that it does not shift along the guide rail in the intended direction of movement. It is therefore preferably kept in the same place in the shaft for the duration of the construction of the counterweight.
  • the support column is held on the suspension device for this purpose.
  • a suspension means is suitable for holding, such as it runs to or through the suspension device after assembly and carries the car and the counterweight during operation of the elevator.
  • the suspension device or support column can also be connected to another cable that is anchored further up the shaft.
  • the support column can stand with a lower end area on a support device which is designed to support the counterweight during assembly.
  • a support is similar to a buffer.
  • the carrying device is therefore preferably later replaced by the buffer, or the buffer is at least based on parts of the carrying device.
  • the support column has a contact surface for a buffer on a lower end area and/or has the suspension device on an upper end area opposite the lower end area.
  • the buffer plate and the suspension device are the two coupling points on the Counterweight at which the essentially vertical reaction forces to the counterweight loads are introduced into the counterweight. It is therefore advantageous that these two coupling points are located on the support column.
  • the support column forms the stable core of the counterweight.
  • the holding element is attached to the support column.
  • the holding element holds the weight stacks.
  • the holding element makes it possible to transfer the counterweight loads to the support column.
  • Counterweight loads are to be understood as meaning the static weight of the weight stack and also the other loads on the weight stack, such as those that occur, for example, as a result of acceleration, emergency braking, safety braking or buffer travel.
  • the support member can transfer the counterweight loads directly by transmitting the counterweight loads through the support member itself, or the support member allows the counterweight loads to be transferred from the weight stack to the support column.
  • the holding element can be held on the support column, for example, by means of welding or a form-fitting connection.
  • the holding means can, for example, be welded to the wall of the support column or screwed into a thread in the wall of the support column.
  • At least one weight block extends essentially over the entire height of the counterweight.
  • Weight blocks which are also vertically aligned, are arranged on the fixed support column.
  • Weight blocks preferably have an essentially cuboid shape. Only one layer of vertically aligned weight stacks can do this are arranged, or preferably several layers one after the other. Since the weight stacks are applied from the side, the resulting layers are juxtaposed.
  • the weight blocks are preferably also shaped in such a way that at least the two shorter edge lengths of the cuboid have edge lengths of 5 cm to 30 cm, preferably 15 cm to 20 cm. Due to this slim design, the cuboids can therefore be easily transported to a construction site and, for example, through stairwells.
  • weight blocks extend essentially over the entire height of the counterweight.
  • the counterweight therefore only has a single stack of weight blocks. This makes it possible to keep the number of carriers low. As a result, fewer carriers have to be transported into the shaft if they were not already attached to the support column. It is an advantage that by using weight stacks that extend the full height of the counterweight, the number of weight stacks to be used from a given cross-section is minimized.
  • the counterweight can have two stacks of weight blocks which are arranged one above the other, i.e. in the direction in which the weight blocks extend, the length of which essentially corresponds to half the height of the counterweight. These shorter weight stacks are then easy to transport again.
  • the support column is mounted centrally in the counterweight, with the counterweight in particular having a single support column.
  • the advantage of the proposed counterweight is that the upper and lower yokes that conventional counterweights have are eliminated.
  • the support column is arranged centrally in the counterweight, i.e. it is directly under the suspension.
  • the support column preferably runs through the center of gravity of the counterweight. This means that the weight of the weight blocks is transmitted centrally under the suspension device to the support column, and these forces are then essentially transmitted directly to the suspension device as tensile forces.
  • the counterweight has at least one second weight block on a side of the support column opposite the first weight block.
  • the weight blocks all have a direction of longest extension, which runs parallel to the direction of longest extension of the support column, ie vertically.
  • Multiple layers of weight blocks are preferably arranged on both sides of the support column. This can be the case in one or more batches.
  • the density of the weight blocks can also be adjusted. This has the advantage that the center of gravity of the counterweight can be adjusted so that it is on the inside of the support column.
  • a preferably symmetrical arrangement of weight blocks on both sides of the support column results in a center of gravity for the complete counterweight, which lies inside the support column. This minimizes the forces applied to the counterweight by the guide shoes.
  • weight blocks are attached to two opposite sides of the support column.
  • the arrangement of the weight stacks on the two sides can differ.
  • different weight blocks can be arranged on the two sides. These can differ in their width, for example, in order to adapt the counterweight to a shape required in the shaft.
  • the weight blocks can also differ in their density. For example, narrower and therefore denser weight blocks can be used if it is necessary to make the counterweight locally narrower.
  • weight stacks of different weights whether due to different densities or different widths or thicknesses, on opposite sides, it is possible to adjust the center of gravity.
  • counterweights can also be realized whose center of gravity, and thus preferably also the support column, are not in the geometric center of the counterweight. the Suspension of the counterweight, together with the support column, can therefore be shifted away from the geometric center of the counterweight.
  • steel plates i.e. high-density weight blocks
  • lower-density concrete blocks can be used as weight blocks on the other hand.
  • Weight stacks can be placed in one or more stacks on each side of the support column.
  • the holding means runs through the support column.
  • the support column therefore has an opening through which the holding means runs further through the support column.
  • the opening is a bore that runs through both walls of the support column.
  • the holding means holds weight blocks on a first side of the support column.
  • the holding means can either hold additional weight blocks, or it has a means for attachment to the support column.
  • Such a means of attachment can be, for example, a holding head.
  • Such a holding head has a shape that does not fit through the bore and therefore fixes the holding means to the support column, especially under tensile stress.
  • a further advantage is that a single holding means is positively connected to the support column on both sides of the support column. Therefore, a better transmission of the moments that act on the holding elements due to the counterweight loads is possible.
  • a single holding means holds both weight stacks on one side of the support column and on the opposite side of the support column.
  • fewer holding means have to be attached.
  • Another advantage is that the moments to be transferred to the support column are reduced. Since the moments of the weights of the weight stacks cancel each other out with the moments of the weights of the weight stacks on the opposite side. If the same number of weight stacks of the same type are attached at the same distance on both sides, then lift the moments even open completely. Then the holding element causes only a vertical force on the support column. In general, the forces and moments of the holding means are introduced into the support column in a better and more gentle manner.
  • the holding element is designed as a carrier that is attached to the support column. At least one weight stack is carried by the wearer.
  • the carriers are designed in such a way that they transfer at least part of the weight of the weight blocks to the support column.
  • the carriers are preferably made of metal. They can be firmly connected to the support column, for example by welding, or they can only be pushed in or through the support column.
  • a carrier can preferably also carry several weight blocks.
  • several weight blocks are preferably arranged on one side of the support column, all of which are supported by one, preferably two, supports.
  • the carrier preferably continues through the support column and carries further weight blocks on the opposite side.
  • the advantage of the carriers is that they preferably absorb the static weight of the weight elements. They are therefore able to absorb the weight of all weight stacks while the counterweight is being set up, so that no further support structures are required.
  • An alternative to using the carriers is the teaching presented below.
  • the holding element is designed as a traction device, and at least one weight block is pressed against the support column by a tension force in the traction device.
  • a clamping force is applied to the traction mechanism.
  • the traction mechanism exerts a compressive force on the weight blocks on at least one side of the counterweight and on the support column.
  • This compressive force acts as a normal force at the contact surfaces between the weight stacks or between a weight stack and the support column.
  • This normal force creates a frictional force.
  • This frictional force can Now transfer the counterweight loads from each individual weight stack to the support column, possibly via additional weight stacks. These forces are then compensated on the support column by forces from the suspension device, the buffer plate or the safety brakes.
  • the contact surfaces between the individual weight blocks or the weight blocks and the support column can preferably be optimized for higher frictional forces.
  • a friction-enhancing layer can be placed between two weight stacks or between a weight stack and the support column. Rubber mats in particular are well suited for generating high frictional forces.
  • the surfaces of the weight blocks or the support column can also be roughened, for example, or machined in such a way that the surfaces interlock with one another.
  • the weight blocks are firmly connected to the other weight blocks and the support column by the clamping forces and the frictional forces.
  • a stable counterweight can be built up.
  • the counterweight consists exclusively of slim components that can be transported very easily into the shaft.
  • the traction means can be attached to one side of the support column.
  • the traction mechanism can be held on the support column, for example, by means of a weld, by a form fit, or by a thread.
  • a rod can be welded to the support column and have a thread on the end spaced from the support column, in order to screw on and tighten a nut for tensioning.
  • a screw can also be screwed into a thread on the support column, the screw head of which presses the weight block against the support column.
  • a holding element can therefore be a carrier and a traction device, only a carrier or only a traction device at the same time.
  • the holding elements are designed in such a way that they can take on the weight of the weight blocks placed on them as carriers. However, the other weight loads, such as those that occur during emergency braking, safety braking or buffer travel, are then compensated for by the frictional forces transfer.
  • the sufficiently large static friction forces are achieved by tensioning the holding elements, ie by using the holding elements as traction means.
  • the holding element thus acts as a carrier and as a traction mechanism.
  • the counterweight has an essentially rectangular cross section, the rectangle comprising two end faces of equal length and two side flanks of equal length.
  • the side flanks are longer than the end faces.
  • the or one of the traction means is stretched along the two side flanks.
  • the traction means can therefore also run laterally along the side flanks of the weight blocks and laterally next to the support column.
  • the weight blocks can be in the form of simple cuboids, ie in particular without openings. Such weight blocks are extremely easy to manufacture.
  • Band-like traction devices such as tension belts or belts are particularly suitable for use along the side flanks of the weight stacks of a counterweight. Steel-reinforced belts are also suitable for this.
  • the support column preferably has retaining straps.
  • Such holding straps are suitable for counteracting the slipping of the weight blocks when the tension of the traction mechanism decreases.
  • retaining straps can also be attached to the weight stacks. If the tensioning force in the traction device is too low, for example due to aging processes in the traction device, the frictional force no longer carries the weight blocks and the weight blocks therefore slip off.
  • the function of the retaining straps is to limit the slipping of the traction device on the support column.
  • the traction mechanism at the outermost weight block is shifted with the weight block. As a result, the traction means is no longer stretched horizontally, but has a slight angle. As a result, the clamping force in the traction device increases again and the weight stacks continue to be held.
  • the gauge is used to position the weight blocks correctly during assembly and to hold them until they are held by the traction mechanism on the support column.
  • the support structure is essentially rectangular in shape.
  • the width of the rectangle corresponds to the width of the counterweight, and the length of the rectangle corresponds to the length of the long edge of the rectangle.
  • the gauge is preferably attached to the support column.
  • the tension elements for attachment can be designed as rods, ropes or chains.
  • the tension elements run from an attachment point on the support column arranged at an upper end region of the support column to one of four attachment points arranged on the support structure, which are each located at one of the four corners of the rectangle.
  • the use of four support ropes, the length of which can be adjusted at least in part, is optimal, since the support structure can thus be aligned well horizontally.
  • the gauge can be supported on the shaft floor.
  • a frame can be set up on the shaft floor, which has the support structure with the receiving area.
  • this frame can be attached to the rail in the elevator shaft.
  • this allows only traction means to be used and supports to be dispensed with completely as holding elements. Instead of the weight stacks being supported by a support when placed on the support column, they are supported by the jig. After tensioning the traction means, the weight blocks are held by the frictional forces.
  • the gauge is only temporarily attached to the support column while the counterweight is being set up. After the traction device presses the weight blocks against the support column, and the weight blocks and the support column are held together in such a way that they form a solid bond, the gauge can be removed.
  • the method also has the step of arranging a further weight block on a preceding weight block and on the gauge, in particular the further weight block is placed on the receiving area.
  • a counterweight can therefore hold more than one stack of weights on each side.
  • the first weight block which is arranged directly along the support column at least one further or preferably several further weight blocks are arranged along the first weight block on the gauge. This step is of course done before removing the jig.
  • the basic concept is based on modular basic elements with which counterweights of different shapes, dimensions and masses can be assembled. This makes it possible to produce counterweights with very different masses from essentially identical components.
  • the method also has the step of pressing at least one weight block against an adjacent weight block or against the support column using the clamping force of the traction means.
  • a traction device spans weight blocks and/or the support column, or that a traction device is stretched through passages through the weight blocks and/or the support column.
  • the outermost weight blocks are pressed directly by the traction mechanism.
  • the weight blocks in between and the support column are indirectly compressed by the clamping force.
  • the traction means in such a way that a weight block is pressed against an adjacent weight block or the support column.
  • a weight block is pressed against an adjacent weight block or the support column.
  • This adjacent block of weight can then be pressed against a further block of weight via a further traction mechanism, so that the entire counterweight is held together.
  • a first weight block can be clamped to the support column on one side, for example using screws as traction means.
  • a second weight block is then clamped to the first weight block using screws as traction means.
  • the other weight blocks are then clamped to the preceding weight block with screws as traction means.
  • the preferred embodiment is that several traction means each press all weight blocks against the support column. In this arrangement, a single traction device would already hold all the weight blocks. Each additional traction mechanism keeps the assembly together even better.
  • the weight block has openings through which the holding element runs.
  • the holding element can be designed as a metal rod.
  • Such metal rods preferably have a thread at least at one end, in particular if the metal rods also act as traction means.
  • the other end can have a holding head.
  • Rods with threads at the ends or continuous threads are suitable as traction devices.
  • the openings in the weight blocks allow the, in particular rod-shaped, traction means to be easily accommodated.
  • the breakthroughs can be implemented as bores in the weight blocks. This is advantageous for metal weight stacks.
  • the breakthroughs are preferably produced during casting.
  • the cuts extend in depth from a surface of the weight stack.
  • the cuts emanate from a surface which, by assembly, becomes the side flank of the counterweight.
  • the incision goes up into the weight stack at an angle between 30° and 60°.
  • the weight block can be hung up on a holding element, preferably a carrier, as with a hook during the incision. This allows for a very simple assembly process.
  • the counterweight 100 has a centrally arranged support column 1.
  • the support column 1 has a suspension device 5 at its upper end.
  • the suspension device 5 essentially transfers the weight of the counterweight 100 to the suspension means.
  • the holding elements 3 assume the hybrid function both as a carrier 31 and as a traction means 32. This means that the weight blocks 2 rest on the holding elements 3 on the one hand. As a result, the holding elements 3 are subjected to bending loads. On the other hand, the holding elements 3 also serve to press weight blocks 2 against one another and against the support column 1 .
  • the force to press against each other and the support column is applied via nuts.
  • the holding elements 3 each have a thread on the ends pointing away from the support column 1 . By screwing the nuts onto this thread and by tightening the nuts, the clamping force is generated which presses the weight blocks 2 against one another or the support column 1. Due to the fact that the weight blocks 2 are pressed against one another, a frictional force arises between the individual weight blocks, which at least partially transfers the weight forces of the individual weight blocks to the support column 1 .
  • the counterweight 100 is on one side of the support column 1 narrower than the other side. Therefore, high-density weight blocks 21 and low-density weight blocks 22 are attached to the counterweight 100 . By selecting the density of the weight blocks 2, the center of gravity of the counterweight 100 can be specifically placed in the support column 1.
  • the holding element or elements act as a carrier 31 for these force components.
  • the weight leads to a bending load in the carrier 31 .
  • the weight blocks 2 are braced into a tightly held package. If increased loads occur during operation of the counterweight 100, for example during an emergency stop or a safety brake, these forces are transmitted to the support column 1 via the friction between the weight blocks 2 on one another and on the support column 1.
  • the bending stress in the holding element 3 does not continue to increase since all additional forces are absorbed by the friction.
  • weight blocks 2 as can be used in a counterweight 100 according to the invention.
  • the weight stacks usually have openings 6.
  • the weight blocks 2 can also have no openings 6 .
  • Such weight blocks 2 are particularly suitable for the embodiment as in 6 shown.
  • Fig. 4 a shows a weight block with two holes 61 as openings 6.
  • Such weight blocks can be used with a counterweight 100 as in FIG 2 shown are simply pushed onto the holding elements 3. As soon as the weight blocks have all been pushed on, the nuts are screwed onto the holding elements 3 and tightened.
  • FIG 4b shows a weight block 2 with two cuts 62 as openings 6.
  • Such weight blocks can be used with a counterweight 100 as in FIG 2 shown are simply hung on the holding elements 3. The nuts at the ends of the holding element can remain on the holding element. Once all weight stacks 2 are attached, the nuts are tightened.
  • Both types of openings 6, that is, the bore 61 or the incision 62, can be produced, for example, by machining, for example by drilling or milling.
  • This manufacturing method is particularly advantageous for weight blocks 2 made of metal, in particular weight blocks made of iron or steel.
  • the weight blocks 2 can also be cast. Cast weight blocks 2 are preferably made of concrete.
  • Figure 4c shows a weight block 2 as could be used in a counterweight 100, in which the weight blocks extend over the entire height of the counterweight 100.
  • FIG figure 5 shows an example of different configurations of the holding elements 3 on a single support column 1. These are shown in sectors A, B and C of FIG figure 5 shown. One of these configurations would preferably be provided for all holding elements 3 on the support column 1 .
  • the support column 1 has a roller 34 as a suspension device 5 in an upper end area. This is advantageous in an elevator with a 2:1 suspension ratio.
  • holding elements 3 are attached, for example, which have a holding head 35 .
  • the holding head 35 is thereby pushed up to the support column 1 .
  • a holding element 3 only holds weight blocks on one of the two sides of the counterweight 100.
  • the advantage of this arrangement is that the support column 1 can be introduced into the shaft without holding elements 3. This is very easy, since the support column 1 is very slim and lightweight without the holding elements 3 and can therefore be easily introduced into the shaft.
  • the holding elements 3 are pushed through the support column 1 .
  • the weight blocks 2 are pushed onto the holding elements 3 or attached.
  • the holding means 3 are tensioned with nuts which are screwed onto the thread at the end of the holding elements 3 .
  • the holding means 3 are therefore both carriers 31 and traction means 32 here.
  • a holding element 3 is attached, which is designed to be continuous, ie it covers both sides of the counterweight 100 . It is a single rod as a holding element 3, which is inserted through a hole in the support column 1 is plugged. Such a holding element 3 is preferably connected to the support column 1 by two welded connections 33 . Since the welded connections 33 are preferably made in the factory, the quality of the connection is permanent and stable.
  • a holding element 3 is attached, which is also designed to be continuous. However, this is designed to be freely movable. Like the embodiment in sector A, it shows the advantage that the support column 1 without the holding elements 3 turns out to be very slim and lightweight. And therefore can be easily brought into the shaft. There, the holding elements 3 are first introduced into the bores in the support column 1 . Furthermore, however, the holding elements 3 are also very simple and inexpensive. The holding elements 3 are essentially rods with threads at the ends.
  • the 6 shows an alternative embodiment of the counterweight 100.
  • the holding elements 3 are designed exclusively as tension elements 32 here.
  • the tension element is preferably designed as a tension belt.
  • the tension element includes all weight blocks 2 and the support column 1 and tightens them together. The frictional forces between the weight blocks 2 and between the weight blocks 2 and the support column 1 are so great that the counterweight 100 remains a solid bond under all operating conditions.
  • the traction mechanism 32 is stretched around all the weight blocks 2 and the support column 1 .
  • the traction means 32 transfers its tensioning force to the end faces 101, the end faces 101 each being a surface of the two outermost weight blocks 2. In between, the traction means 32 runs along the side flanks 102.
  • the counterweight 100 also has retaining straps 36 as a safety device.
  • the traction mechanism 32 is typically tensioned horizontally. A loss of tension could cause some of the weight blocks 2 to slip relative to the support column 1 .
  • the tabs mean that the traction means now runs slightly diagonally. This tensions the traction means again, and the tensioning force required for holding is achieved again. So if the traction device 32 would erroneously loosen, for example due to aging, the weight blocks 2 would still be due to the
  • a counterweight 100 as in 6 shown is facilitated by the use of a gauge 70, as in 7 shown.
  • 7 shows a support column 1. This is lightweight and slim and can therefore be easily introduced into a shaft.
  • the gauge 70 is then attached to the support column 1 in the shaft. Tension elements 72 are very suitable for this.
  • the gauge 70 has a support structure 71 with a receiving area 73.
  • the individual weight blocks 2 can now be placed next to the supporting column 1 on the receiving area.
  • the traction means is then placed around all the weight blocks 2 or, alternatively and not shown here, around the weight blocks on one side of the counterweight 100 and tightened sufficiently. After that, the gauge will be removed.

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  • Cage And Drive Apparatuses For Elevators (AREA)
EP20216373.9A 2020-12-22 2020-12-22 Contrepoids Withdrawn EP4019450A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20216373.9A EP4019450A1 (fr) 2020-12-22 2020-12-22 Contrepoids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20216373.9A EP4019450A1 (fr) 2020-12-22 2020-12-22 Contrepoids

Publications (1)

Publication Number Publication Date
EP4019450A1 true EP4019450A1 (fr) 2022-06-29

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ID=73856745

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20216373.9A Withdrawn EP4019450A1 (fr) 2020-12-22 2020-12-22 Contrepoids

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EP (1) EP4019450A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE306962C (fr) *
JPS557115A (en) * 1978-06-27 1980-01-18 Tokyo Shibaura Electric Co Balance weight
JPS5675377A (en) * 1979-11-27 1981-06-22 Tokyo Shibaura Electric Co Balancing weight device for elevator
US20040094371A1 (en) * 2002-10-29 2004-05-20 Dario Augugliaro Elevator counter weight
WO2020127303A1 (fr) 2018-12-20 2020-06-25 Inventio Ag Contrepoids asymétrique pour une installation d'ascenseur et installation d'ascenseur équipée de celui-ci

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE306962C (fr) *
JPS557115A (en) * 1978-06-27 1980-01-18 Tokyo Shibaura Electric Co Balance weight
JPS5675377A (en) * 1979-11-27 1981-06-22 Tokyo Shibaura Electric Co Balancing weight device for elevator
US20040094371A1 (en) * 2002-10-29 2004-05-20 Dario Augugliaro Elevator counter weight
WO2020127303A1 (fr) 2018-12-20 2020-06-25 Inventio Ag Contrepoids asymétrique pour une installation d'ascenseur et installation d'ascenseur équipée de celui-ci

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