JPH0213589A - Elevator rope wheel device - Google Patents

Abstract

PURPOSE:To correct the elongation of a main rope readily and in a short time by adopting an eccentric shaft structure in which a shaft of a rope wheel is rotatingly adjusted with reference to a shaft support to make an eccentric motion for height changing. CONSTITUTION:When a main rope 2 is stretched initially, a rope wheel 18 which serves as a driving pulley mounted on an elevator cage or counterweight is held via an eccentric shaft 17 at a high position with reference to a shaft support 16. When the main rope 2 has elongated with age, the rope wheel 18 is held at a low position with reference to the shaft support 16 by rotatingly adjusting the eccentric shaft 17. This permits the elongation of the main rope 2 to be corrected without shortening the main rope 2.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Industrial Field of Application) The present invention relates primarily to an elevator sheave system as a movable pulley attached to a 2:10-ping elevator car or counterweight.

(Prior art) In general, a 2=10 one-pin type elevator has a plurality of sheaves (only one is shown and others omitted in the drawing) in a hoisting machine sheave 1 installed in a machine room above the hoistway, as shown in Fig. 4. The main rope 2 is wrapped around it, one end of the main rope 2 hangs down into the hoistway, and then it is wrapped around the sheave 5 of the sheave device 4, which serves as a movable pulley, installed in the second part of the car 3'' and turned upward. The upper end is fixed to the rope hitch part 7 via the simple rod 6, and the other end is suspended into the hoistway via the deflecting sheave 8.
Then, the counterweight 9 is wound around the sheave 11 of the sheave device 10 as a movable pulley provided on the upper part of the counterweight 9 and turned upward, and its upper end is fixed to the rope hit part 13 via the simple rod 2 as described above. and the hoisting machine sheave 1
The car 3 and the counterweight 9 can be moved up and down relative to each other via the main rope 2 by the rotational drive of the car.

A shock absorber 14 is installed in the pit at the lower end of the hoistway to cushion the impact in the event of an abnormal fall.

In the case of such an elevator, the main rope 2 is constantly subjected to tension due to the loads of the car 3 and the counterweight 9 from the moment it is stretched, and therefore elongates due to aging. As a result, when the car 3 rises to the top floor, the counterweight 9 comes into contact with the shock absorber 14 at the lower end without maintaining a gap, and in the worst case, the car may land on the top floor. The inconvenience will occur if you are unable to do so.

For this reason, conventionally, when the main rope 2 stretches and the gap between the counterweight 9 and the shock absorber 14 decreases, the main rope 2 is shortened to correct its length. was.

The main rope 2 is cut down by first hoisting the car 3 using a chain block (not shown) or the like.
In addition to preventing the main rope from falling, the tension on the main rope 2 is loosened. In this state, the simple rod 6 on the one end side of the main rope 2 is removed from the rope hitch 7 while preventing the one end side of the main rope 2 from hanging down. Then, the Babbitt metal fixing one end of the main rope 2 to the simple rod 6 is melted with a torch or the like, and one end of the main rope 2 is removed from the simple rod 6 and cut to an appropriate length. In this way, one end of the main rope 2 is again inserted into the simple rod 6, the end is bent, and the connection is fixed by injecting and hardening Babbitt metal, and the simple rod 6 is connected to the rope hit part 7.
Attach to. After this, the chain block is loosened and removed, the car 3 is supported by the main rope 2, and the main rope 2 is given a regular tension to return to a state in which it can be driven by winding (one machine sheave). Finally, the tension imbalance between the plurality of main ropes 2 that occurs when the ropes are trimmed is adjusted uniformly by tightening the nut at the upper end of the simple rod 6, etc., and the work is completed.

(Problem to be solved by the invention) As mentioned above, when the main rope 2 has elongated due to aging, the main rope 2 has conventionally been corrected by being shortened. Attaching and detaching the rod 6 to the rope hit part 7, attaching and detaching the main rope 2 to the simple rod 6 by melting or injecting Babbitt metal into the simple rod 6, and cutting the main rope 2. Or, multiple main ropes 2
It is necessary to work to uniformly adjust the mutual tension, which is a very complicated work, takes a lot of effort and time, and requires a high degree of skill and skill.

The present invention has been developed in view of the above circumstances, and when the main rope has elongated due to aging, it can be done very simply and in a short time, without requiring the complicated rope trimming work that was done in the past, and which also requires advanced technology and skill. To provide a simple elevator sheave device capable of correcting elongation of a main rope without having to do so.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a sheave device as a movable pulley attached to an elevator car or a counterweight, in which the shaft of the sheave is rotated with respect to the shaft support. It features an eccentric shaft structure that allows eccentric movement and height changes by adjusting.

(Function) With the above configuration, in the elevator sheave device of the present invention, the shaft of the sheave as a movable pulley attached to the elevator car or counterweight has an eccentric shaft structure, and the shaft is connected to the shaft support. Adjusting the rotation causes eccentric movement and changes the height, so at the initial stage of tensioning the main rope, the sheave is held at a high position relative to the shaft support via the eccentric shaft.
If the main rope has elongated due to aging, the sheave can be held at a low position relative to the shaft support by adjusting the rotation of the eccentric shaft, thereby eliminating the need to cut the main rope. Elongation correction can be done very easily.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 3. The general structure of the elevator as a whole is the same as that shown in FIG. 4, so it is not shown.

Figures 1 and 2 are a front view and a cross-sectional view of a sheave device 5 as a movable pulley installed on the upper part of the car 3 in the same way as shown in Figure 4, and show a U-shape on the upper surface of the upper frame of the car 3. Shape shaft support 1
6 is fixedly mounted, and a shaft 17 passes through the bearing holes 16b on both sides between the rising plate portions 16a on both sides of the shaft support 16.
A sheave 18 is rotatably attached via the sheave 1.
A plurality of main ropes 2 are wound around the main rope 8.

Here, the shaft 17 has an eccentric shaft structure and is supported by a support.]
Both end shaft portions 1.78 rotatably fit into the circular bearing holes 16b of the both side rising plate portions 16a of 6, and the both end shaft portions 17
17a, and an intermediate eccentric shaft portion 17b connected to each other, and the axis 01 of the intermediate eccentric shaft portion 17b is offset by an appropriate distance from the axis 0° of both end shaft portions 17a. The sheave 18 is rotatably fitted and attached to the intermediate shaft portion 17b. In other words, when the shaft 17 is rotated with respect to the bearing holes 16b on both sides of the shaft support 16, the intermediate eccentric shaft portion 17b is displaced up and down by eccentric movement with respect to the both end shaft portions 17a, and the height of the sheave 18 is adjusted. It can be changed. Further, one of the both end shaft portions 17H of the shaft 17 has a groove 1 located on the opposite side to the eccentric direction of the intermediate eccentric shaft portion 17b.
7c is formed, and a shaft fixing plate 19 is provided which engages with this groove 17c to restrict the rotation of the shaft 17.
It can be selectively mounted with two bolts 20 to threaded holes 16d and 16e formed in left and right pairs on the upper and lower sides of the bearing hole 16b.

Therefore, in the elevator network device 15 having the above-described configuration,
If the main rope 2 is to be attached to the top of the elevator car 3 as a moving pulley and wound around the sheave 18 as in the past, when the main rope 2 is new, such as during initial installation or when the rope is replaced, As shown in FIG.
This intermediate eccentric shaft part], 7b is rotated so that the axis 01 is directly above the axis 02 of both end shaft parts 17a, and the groove is thus directed downward], 7c is rotated from below to the shaft Fixed plate 19
are engaged and positioned and fixed to the shaft support 16 with two bolts 20. Now the shaft] 7 intermediate eccentric shaft part], 7 b
is disposed highest relative to the shaft support 16 to support the sheave 18.

However, if the main rope 2 stretches over time and the gap between the counterweight 9 and the shock absorber 14 becomes narrower as described above, the car 3 may be hoisted up using a chain block or the like and the main rope 2 may be stretched. 2, then remove the two bolts 20 and remove the shaft fixing plate 19 once. Then, as shown in FIG. 3, the shaft 17 is
The groove 1 is rotated 180 degrees so that the axis 01 of the shaft 7b is directly below the axis 02 of the shaft portions 17a at both ends, and the groove 1 is now facing upward.
7c is engaged with the shaft fixing plate 19 from above and positioned and fixed to the shaft support 16 with two bolts 20. Now, the intermediate eccentric shaft portion 17b of the shaft 17 is arranged at the lowest position, which is twice the eccentric distance than the previous time, with respect to the shaft support 16, and supports the sheave 18. In other words, the net sheave 18 is drawn to the car 3 twice the eccentric distance of the intermediate eccentric shaft portion 17b, and the main rope 2 is cut by twice the drawn distance. It will be the same thing.

Finally, loosen and remove the chain protector,
The main rope 2 is restored to a state in which it can be driven by the sheave 1 of the hoist by applying a regular tension to it. This completes the work to correct the elongation of the main rope 2, and it becomes possible to maintain an appropriate gap between the counterweight 9 and the shock absorber 14. During this correction work, only the height of the sheave 18 was changed without cutting down the main ropes 2 one by one as in the past, so there is no need to adjust the tension between the multiple main ropes 2 to equalize the tension as in the past. becomes.

Note that the present invention is not limited to the above-mentioned embodiments; for example, the above-mentioned sheave device 15 has been described as being provided above the car 3, but the present invention may be similarly applied to a sheave device provided above the counterweight 9. The effect of this can be obtained.

〔Effect of the invention〕

As described above, the present invention has an eccentric shaft structure in which the shaft of a sheave as a movable pulley attached to an elevator car or a counterweight is eccentrically moved by adjusting the rotation of the shaft with respect to the shaft support. Because the height changes, when the main rope is initially stretched, the sheave is held at a high position relative to the shaft support via the eccentric shaft, and if the main rope elongates due to aging, By holding the sheave at a low position relative to the shaft support by adjusting the rotation of the eccentric shaft, this method is extremely simple and quick, and requires a high level of skill and skill, without the complicated rope trimming work required in the past. This is a simple elevator sheave device that can correct the elongation of the main rope without having to do so.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention. Figure 1 is a front view of the sheave device, Figure 2 is a cross-sectional view of the same, and Figure 3 is a cross-sectional view of the sheave device to correct elongation of the main rope. FIG. 4 is a front view showing a state in which the height of the sheave is lowered through an eccentric shaft, and FIG. 4 is a schematic configuration diagram of the entire elevator showing a conventional example. 2... Main rope, 3... Basket, 9... Counterweight, 5.10.15... Sheave device as movable pulley, 1
6... Shaft support, 17... Sheave shaft, 17a... Both end shaft parts, 17b... Intermediate eccentric shaft part, 18... Sheave wheel,
19...Axle fixing plate. Applicant's agent: Patent attorney Takehiko Suzue↓. Figure 4

Claims (1)

[Claims] A sheave device as a movable pulley attached to an elevator car or a counterweight, characterized by an eccentric shaft structure in which the height changes by eccentric movement by adjusting the rotation of the sheave shaft relative to the shaft support. elevator sheave system.