FR2782072A1 - DEVICE AND METHOD FOR MOVING A MACHINERY ALONG AN ELEVATOR SHAFT DURING THE CONSTRUCTION OF A BUILDING - Google Patents

Abstract

This device includes a machinery platform (22) which carries the elevator machinery (20) and is mounted to slide in said shaft (10), where said platform is equipped with laterally retractable catches (24) whereby it can be carried by one of several supports (26) formed in the shaft to the different levels serviced by the elevator, a thrust platform (30) mounted at least one level lower than the machinery platform, and which is also equipped with retractable catches (32) whereby it can be carried by one of said supports (26), and a jacking device (34, 36) linking the thrust platform (30) to the machinery platform (22), which are able on the one hand to push the machinery platform to raise it at least one level, and on the other hand to pull the thrust platform to raise it one level while being carried by the machinery platform which rests of one of said supports (26).

Description

DEVICE AND METHOD FOR MOVING A MACHINERY

  ALONG AN ELEVATOR SHEATH DURING CONSTRUCTION

OF A BUILDING.

FIELD OF THE INVENTION

  The present invention relates to a method and device for moving machinery along an elevator shaft in a high-rise building under construction,

  as new floors are built.

STATE OF THE ART

  The workers who build a tower must be able to quickly reach the highest level of the tower and move freely between the levels already built. Currently, they are offered two options for making these trips: either temporarily installing a site hoist outside the tower that moves along the facade, or building inside from the tower a final elevator installation mounted in a permanent shaft which is raised as floors are built, this installation being usable by

workers during construction.

  The Applicant has developed and used in the past 25 years, an elevator installation of the second type mentioned above. This installation includes machinery which is hoisted periodically to bring it to the level of the last storey constructed, by means of the site crane. However, given that this operation is spread over approximately one day, during which time the crane is not used for transporting materials and is therefore not profitable, up to now we have avoided raising the machinery each time. once a new storey is built, and we only do this after several new storeys have been built, usually every five storeys. This resulted in a loss of time for workers to get to work level from the last level served by the elevator

  and a loss of money for the owner.

  moreover, in order not to delay the works, we tried to carry out this operation during the weekend, but the cost of the working day is then higher

than for a day of the week.

  There is therefore a need to find a device which makes it possible to raise the machinery in a very short time and

without using the construction crane.

SUMMARY OF THE INVENTION

  According to the invention, these objectives and advantages are achieved by means of a device for elevating the machinery of an elevator, characterized in that it comprises: a platform of machinery which carries the machinery and which is mounted sliding in said sheath, said platform being provided with retractable lateral tabs by means of which it is capable of bearing on one of several supports formed in the sheath, at the level of the different levels served by the elevator, a platform push also slidably mounted in the sheath, said push platform being mounted at least at a lower level than the machinery platform and also being provided with retractable cleats by which it can rest on one of said supports, and motor means connecting the thrust platform to the machinery platform, and which are capable on the one hand, of vertically pushing the machinery platform for the raise at least one level by resting on the thrust platform resting on

  one of said supports, and secondly, to pull the platform

  form of thrust to raise it by one level by resting on the machinery platform which rests on its supports. The drive means can be constituted by pneumatic, hydraulic or electric jacks or else

  by racks driven by a motor.

  The lifting device of the invention makes it possible to raise the machinery platform without having to use the site crane and therefore without suspending the work of the crane. An operating cycle lasts only a few hours so that one can afford to move the machinery platform each time a new floor has been built. This lifting system therefore saves the workers' fatigue and makes it possible to save a great deal of time and consequently an appreciable reduction in the cost of

construction of the tower.

BRIEF DESCRIPTION OF THE FIGURES.

  Other characteristics and advantages of the invention

  will appear on reading the description which follows

  of an embodiment, made with reference to the accompanying drawings in which: Figure 1 is a vertical sectional view of an elevator shaft, in a tower under construction, provided with a lifting device finding at an initial level; Figure 2 shows the lifting device in an intermediate phase of its operation; and Figure 3 shows the lifting device in its final state after the machinery platform has

been hoisted from one floor.

  DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

  The figures show an elevator installation of a tower under construction. This installation comprises a sheath 10 of which only the upper part has been shown. The sheath should be extended upward as new levels are built. It has openings closed by doors 11 giving access to bearings 12 located at the different levels constructed. In the shaft are slidably mounted an elevator car 14 and a counterweight 16 connected by cables 18

  and driven in motion by machinery 20.

  This is mounted on a prefabricated platform 22

  which can be brought, by means which will be described below

  afterwards, at the level of the top floor of the tower. For this purpose, the platform 22 is provided with at least four

  side tabs 24, retractable in a horizontal plane.

  In Figure 1, the tabs are shown in the extended state. The platform rests by its tabs on supports 26 formed on the internal wall of the sheath at the level of the

bearings 12.

  The machinery platform is surmounted by a plate 27 on which are installed a controller 29 and a control cabinet 31. The latter are covered with a roof 33

  the workers are working on.

  The elevation system comprises a thrust platform 30 also provided with retractable lateral cleats 32, by means of which it can bear on said

supports 26.

  At least one pneumatic or electric hydraulic cylinder is fixed on the thrust platform (two cylinders 34, 36 in the case of the figure). The rod 38 of the jack (s) is

  solidly linked to the machinery platform 22.

  The extension and retraction of the jack (s), as well as the tabs 24 and 32 are controlled automatically from a central control unit 40 carried by the thrust platform. We will now explain how the system works

elevator of the invention.

  It will be assumed that the elements of the lifting system are initially in the respective positions shown at

  Figure 1. The tower is built up to level N + 3.

  The machinery platform 22 is located at level N and the

  thrust platform 30 at level N-1.

  After the N + 4 level has been built, the machinery platform must be brought to the N + 1 level. The sequence of operations is as follows: the central unit 40 controls a slight extension of the jacks 34, 36 sufficient to be able to take off the tabs 24 from the support 26 on which they are placed; the tabs 24 are then retracted; the control unit 40 then controls the extension of the jacks 34, 36 of a length substantially equal to the height of a stage, which brings the machinery platform slightly above the level N + 1; the cleats 24 are out and the jacks are shortened slightly to allow the cleats to land on the supports of level N + 1. The elevation system is then in the position shown in Figure 2; 1 a central 40 then controls a slight shortening of the cylinders. Since the machinery platform cannot descend, it is the thrust platform which lifts slightly above the supports on which it rests; the tabs 32 of the thrust platform are then retracted; the jacks are shortened by a length substantially equal to the height of a stage, which brings the thrust platform slightly above the level N; the lugs 32 are out and the jacks are slightly extended so that the lugs come to rest on the supports of level N. The elevation system is then in the position shown in FIG. 3. All of the system elements elevation have exactly the same relative positions as

  in Figure 1, but offset by one floor above.

  All operations in the sequence described above

  are controlled automatically by the central unit 40.

  It goes without saying that the system according to the invention can also

  serve well to lower the machinery platform.

  You just have to carry out the operations described

previously in reverse.

  Instead of cylinders, two racks can be used, respectively integral with the machinery platform and the thrust platform and which mesh with

pinions driven by a motor.

  The elevation system knows no power limit. So it can be used to raise all the equipment that moves after the construction of a

new floor.

Claims (6)

  1. Device for moving machinery along an elevator shaft during the construction of a building, characterized in that it comprises: a machinery platform (22) which carries the machinery (20) of the elevator and which is slidably mounted in said sheath (10), said platform being provided with retractable lateral cleats (24) by means of which it is capable of bearing on one of several supports (26) formed in the sheath, at the level of the different levels served by the elevator, a thrust platform (30) also slidably mounted in the sheath, said thrust platform   being mounted at least one level lower than the platform   form of machinery and also being provided with retractable cleats (32) by means of which it can bear on one of said supports (26), and motor means (34, 36) connecting the thrust platform (30) to the machinery platform (22), and which are capable on the one hand, of vertically pushing the machinery platform to make it rise by at least one level by resting on the thrust platform resting on one of said supports, and on the other hand, to pull the thrust platform to make it rise by one level while being supported on the machinery platform which   rests on one of said supports (26).   2. lifting device according to claim 1, characterized in that the motor means are constituted by   at least one pneumatic or hydraulic cylinder.   3. lifting device according to claim 1, characterized in that the motor means are constituted by   two racks respectively secured to the platform   form of machinery and pushing platform and which   mesh with the pinions driven by a motor.   4. lifting device according to claim 1, characterized in that said motor means (34,36) and said cleats (24, 32) are automatically controlled to   from a control center (40) carried by the platform form of thrust.   5. Method of operation of the lifting device   according to one of the preceding claims, characterized in   what it consists of: ordering a slight extension of the jacks sufficient to be able to detach the tabs (24) from the machinery platform from the support (26) on which they are placed; retracting said cleats; then controlling the extension of the jacks (34, 36) of a length substantially equal to the height of a stage; take out said tabs (24) and slightly shorten the jacks to allow said tabs to land on the supports of the floor located above that where the machinery platform was located; slightly shorten the jacks in order to raise the thrust platform above the supports on which it rests; retract the tabs (32) from the push platform; shorten the cylinders by a length substantially equal to the height of a stage; remove the cleats from the thrust platform and slightly extend the jacks so that said cleats come to rest on the supports of the floor located   above the one where the push platform was located.   6. Method according to claim 5, characterized in that the device is used to raise all the equipment   which moves after the construction of a new floor.