JPS59153793A - Traction sheave for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 〔Technical field〕 The present invention relates to a traction sheave for an elevator.

[Explanation and problems of conventional technology]

In order to keep elevators operating safely at all times, maintenance must be performed regularly. However, recently, the number of installed elevators has increased rapidly, but it is not easy to increase the number of elevator maintenance personnel accordingly, and there is a demand for elevators to be maintenance-free. In making this maintenance-free, consideration has been given to ensuring that the transportation function of the building is not lost, even for a short time, by extending the lifespan of consumables, reducing the cost of replacing them midway, and shortening maintenance and repair times. There must be.

On the other hand, in order to increase the speed of elevators, increase loads, and protect the ropes, instead of wrapping the rope directly around the sheave grooves of conventional cast iron sheaves, a lining with traction force is installed on the inner surface of the sheave grooves. A new traction sheave was developed and put into practical use.

FIG. 1 shows a schematic configuration of a general traction type elevator. A traction sheave 2 is installed on the output shaft side of the traction machine l, and a deflection sheave 3 is installed on the output shaft side of the traction machine l.
are attached, a rope 4 is hung over these, and a ride weight 5 and a counterweight 6 are attached to both ends of the rope 40. Then, the traction sheave 2 is
It rotates and drives the ride and 5 up and down.

FIG. 2 shows the traction sheave 2, in which a ring-shaped lining 9 made of a polymeric material shown in FIG. 3 is attached to a sheave groove 8 on the outer periphery of a sheave body 7 made of cast iron. Therefore, when a load is applied to the rope 4 and tension is applied, the tension is received by the frictional force between the rope 4 and the lining 9, and is further received between the lining 9 and the sheave groove 8, and is received by the sheave body 7. is transmitted to.

Therefore, wear of the lining 9 due to long-term operation cannot be avoided, and the lining 9 needs to be replaced in order to prevent the rope 4 from coming into direct contact with the sheave groove 8 and damaging the rope 4. In order to replace the lining 9, it is first necessary to lift the rope 4 out of the sheave groove 8 and then remove the traction sheave 2. The traction sheave 2 is generally press-fitted into the mating shaft, but it is necessary to prepare a special jig and tool to prevent damage to the mating shaft and the traction sheave 2, and to pull it out parallel to the shaft. Tona0 and Konoma are forced to stop the elevator. Even after removing the traction sheave 2, it cannot be removed unless the lining is removed and the lining 9 is reinstalled in the sheave groove 8. However, this work requires direct handling of the traction sheave 2, which has a large diameter, and the continuous rotation of the traction sheave 2. It was difficult to handle, and required long hours for skilled workers.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and an object of the present invention is to provide a traction sheave for an elevator that simplifies assembly and replacement of the lining that constitutes the sheave groove, and that can always maintain safe traction performance. do.

[Summary of the invention]

The present invention is characterized in that a rope supporting arcuate block made of a metal material divided into a plurality of pieces in the circumferential direction is provided on the outer periphery of the sheave body.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

On the outer periphery of the sheave body 7 of the traction sheave 2, a polymer I4 such as polyurethane resin is applied to the contact surface with the rope 4.
A lining 9 consisting of the following is attached, and a rope supporting arc-shaped block 10 divided into a plurality of pieces in the circumferential direction is fixed with bolts. The rope-supporting arc-shaped block 1 () is made by press-forming a metal material such as general structural rolled steel or stainless copper plate into a V-shape or a U-shape as shown in Figure 5, or by pressing stripes as shown in Figure 6. A groove of the desired shape necessary for winding the rope is formed by cutting carbon steel for mechanical structures, etc., and the rope is divided into a plurality of pieces beforehand and formed. Although three sheave grooves 8 are shown in FIG. 4, three to eight sheave grooves are normally used depending on the maximum loading weight of the elevator, but they are formed in the same manner as described above. Also, the diameter of the sheave body 7 is usually 400 to 10,001 mm.
11111, the rope supporting arcuate block 10 is divided into approximately 2 to 8 pieces in the circumferential direction. As mentioned above, in the case of multiple ropes, this block has edges 11 provided on the left and right sides of the upper part of the groove-shaped opening with a U-shaped cross section, and adjacent grooves are integrally formed. It is fixed with screws to the outer periphery of the four parts provided in the groove using the holes provided in the groove.

In a traction sheave manufactured with such a structure and manufacturing method, even when replacing the lining 9, the rope 4 is lifted from the sheave groove 8, or the traction sheave 2 is removed from the mating shaft using a special jig or tool. There is no need to prepare and extract the. That is, the sixth
As shown in the figure, loosen the bolts fixing the lower part of the sheave body 7 on which the rope 4 is not wound, and remove only one of the rope supporting arc-shaped blocks 10 divided into a plurality of pieces in the circumferential direction. Remove the lining 9, replace it with the rope supporting arc-shaped block 10, and fix it again with bolts. Next, the traction sheave 2 is rotated and the same operation is performed. As a result, the lining 9 can be replaced easily, and the downtime of the elevator can be greatly reduced. In addition, since the traction sheave 2 with a large diameter is not directly handled, but the rope support arc-shaped block 10, which is divided into multiple pieces, is handled, the workability of attaching and removing the lining is good, and the time required for these operations is also improved. It is also shortened to a large width. In FIG. 4, the rope supporting arcuate block 10 is fixed with bolts, but the same effect can be obtained even if it is fixed by other methods such as a stopper. As described above, by providing an arc-shaped block for supporting the β lobe made of a metal material divided into multiple pieces in the circumferential direction on the outer periphery of the main body of one sheave, and by attaching a lining made of a polymeric material to the contact surface with the rope. When replacing the lining, there is no need to lift the rope out of the sheave groove or prepare a special tool to remove the traction sheave from the mating shaft, as was done in the past. This can be done simply by re-tightening, which can significantly reduce elevator downtime.

As mentioned above, since the lining is installed and removed in multiple pieces, it is easy to work with, and the time required for this process can be greatly reduced, making it easy to replace the lining.
Safe traction performance can be maintained at all times. Furthermore, since the lining is attached in a state where it is divided into a plurality of pieces, the quality is stable and a highly reliable product can be obtained.

[Brief explanation of drawings]

Fig. 8141 is a schematic diagram of a general traction type elevator, Fig. 2 is a partially sectional front view of a conventional traction sheave, Fig. 3 is a side view of the lining installed in Fig. 2, and Fig. 4 5 and 6 are partially sectional front views of other examples of the sheave according to the present invention, and FIG. d47 is an installation example of the sheave according to the present invention. 2... Traction sheave 4... Rope 7... Sheave body 8... (sheave) groove 9... Lining 10... Arc-shaped block for rope support 11... Σ, Chi (7317) substitute Private patent attorney Kensuke Norichika (and 1 other person) 1st
Figure 2 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] A groove is provided on the outer periphery of the sheave, and a rope with a cage and a counterweight suspended from both ends is wound around the groove, which has a desired groove shape and has an opening of the groove. It has a cross-sectional shape with edges on both sides, and in the longitudinal direction corresponds to a circular arc formed by dividing the outer periphery of the sheave into a plurality of pieces.It is made by plastic working an iron plate, and the groove is made of a polymeric material. A traction sheave for an elevator, in which a lined arc-shaped block for supporting a rope is fitted into a recess provided in place of the groove on the outer periphery of the sheave, and the tabbed portions are fixed to the outer periphery of the four parts.