The installation of an elevator is a critical stage in a building project. The elevator must be available for use as early as possible during the construction period. It is de- sirable that the elevator should function at this stage in the same way as it will in a finished building, and e. g. the safety equipment must be in operation. On the other hand, the elevator should be installed as quickly as possible without causing disturbances in other construction work. Special in- stallations intended for the installation and construction period should be kept to a minimum and the elevator should be directly installed in its final form to avoid the need for later adjustments and trimming. The elevator must be in- stalled quickly and economically. Additional features to the standard requirements are encountered in the installation of an elevator without machine room, in which all the shaft equipment must be mainly installed in the shaft space.

The object of the present invention is to create a new and economical solution for the installation of an elevator. To achieve this, the procedure of the invention is characterised by the features presented in the characterisation part of claim 1. The apparatus of the invention is characterised by the features presented in the characterisation part of claim 8.

According to the invention, during the installation of the elevator the overspeed governor is at least in the vertical direction so adjusted that it corresponds to the final place- ment of the overspeed governor and after the elevator instal- lation the overspeed governor is detached from the suspension

element and fixed in its final mounting point. An element for supporting the overspeed governor is fitted to a suspension element. Further, the overspeed governor is preferably mounted on the suspension element and its position at least in the vertical direction is adjusted to the final position of installation of the overspeed governor and the overspeed governor ropes are adjusted substantially to their final length. The overspeed governor can be utilised during eleva- tor installation and its final installation is easy to carry out and requires no rope length adjustment.

By using the solution of the invention, the shaft equipment for an elevator can be installed quickly and reliably. In- stallation-time overspeed governor installation can be done from the top floor landing. As the overspeed governor is now operational, work safety in elevator installation is substan- tially improved.

In the following, the invention will be described by the aid of a few of its embodiments by referring to the drawings, in which -Fig. 1 presents an elevator shaft before the elevator is installed, -Fig. 2 presents the upper part of the shaft when the over- speed governor is being mounted, -Fig. 3 presents a means for mounting the overspeed gover- nor, and -Fig. 4 presents the upper part of the shaft with the in- stallation finished.

Fig. 1 shows a cross-section of the elevator shaft 2 before installation of the elevator. The shaft comprises a back wall 4 and front wall 6 with door openings 8 at the landings 10 and 11, and side walls 12. Fixed to the shaft ceiling 14 are

suspension elements, such as suspension loops 16,17 and 19, to be used in the installation. There are three suspension loops fixed to the shaft ceiling, of which the first suspen- sion loop 16 is used to mount a hoisting device, the second suspension loop 17 is used for temporary installation of the overspeed governor and the third suspension loop 19 is used during installation as an auxiliary suspension means when in- stalling other shaft components, which not described in this context. The shaft extends somewhat below the lowest floor, forming a pit in which the shaft equipment needed below the elevator car is installed. The door openings are provided with temporary safety walls 18, which may consist of e. g. plastic plates, wooden beams or steel bars.

As illustrated by Fig. 2, a suspension means such as a sus- pension rope 24 is fixed to the suspension loops 16 in the shaft ceiling using a mounting tool 22. The mounting tool has a slot at one end, to which a clamp at the end of a rope can be fitted. Using the mounting tool, the clamp can be set on the suspension loops by means of a fast coupling working on the top floor 11. The suspension rope is fastened to a hoist- ing device 26, by means of which the shaft equipment can be hoisted from the shaft bottom to the mounting height. Using the mounting tool 22, an installation-time frame 30 for the overspeed governor 28 is mounted on suspension loop 17. The frame 30 (Fig. 3) comprises a fastening hook 32 fitted to the end of a rod 31, allowing it to be mounted on a suspension loop 17, and an adjusting bar 34 fitted to the other end of the rod. The adjusting bar is provided with a series of mounting holes 36, in which a mounting base 38 for the over- speed governor can be fixed. The final mounting height 40 of the overspeed governor in the elevator shaft is marked on the side wall 12 and the overspeed governor is mounted at the correct height by fixing it by the mounting holes in the ad- justing bar. After the overspeed governor 28 has been fixed to its installation-time position, the overspeed governor

rope 42 is fitted into the groove of the rope pulley of the overspeed governor and dropped into the shaft and fitted onto a diverting pulley mounted in the bottom part of the shaft.

The overspeed governor rope is adjusted to its final length, whereupon the overspeed governor is ready for use in elevator operation during installation. After the installation, the overspeed governor is removed from its installation-time frame and fixed to an elevator guide rail at the same height.

The guide rails for the elevator car and counterweight are installed starting from the bottom of the shaft and proceed- ing upward one rail at a time. The last section of one of the car guide rails is installed together with the drive machine 58 of the elevator. The elevator drive machine 58 is fixed to the guide rail section 56 on the bottom floor and, using an installation hoist, the machine-guide rail combination is hoisted through the bottom-floor door opening and through the gap between the elevator car and the door opening into the shaft and further up the shaft to the top floor landing 11.

After the elevator machinery has been installed, the over- speed governor 28 is removed from its installation-time mounting and installed in its final place on a support 29 at- tached to the guide rail 56. Fig. 4 presents the upper part of the elevator shaft with the drive machine, guide rails and overspeed governor installed.

In the foregoing, the invention has been described by the aid of one of its embodiments. However, the presentation is not to be regarded as constituting a restriction of the sphere of patent protection, but the embodiments of the invention may be varied within the limits defined by the following claims.

For instance, instead of being fixed to the shaft ceiling, the suspension element may. as well be attached to an element provided in the upper part of the shaft, such as a supporting beam fixed to the shaft walls.