JPH0312790Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an improvement of a counterweight for an elevator.

[Conventional technology]

A conventional elevator counterweight will be explained with reference to FIG. 3 and FIG. 4, which is a sectional view taken along the line A--A in FIG. 3.

In the figure, 1 is the side frame of the counterweight 10,
2 is the upper frame, 3 is the lower frame, 4 is the main rope, 5 is the unit weight, 6 is 4 on the top, bottom, left and right of the counterweight 10.
Guide shoes 7 are installed at various locations, 7 is a guide rail, and 8 is a bracket for fixing the guide rail 7 to the hoistway wall.

[Problem that the invention attempts to solve]

The conventional counterweight 10 described above had the following problems. That is, as shown in Figure 4,
The counterweight 10 has openings of a side frame 1 having a U-shaped cross section located on both sides of the unit weight 5, and recesses 6a of a guide shoe 6 on both upper and lower sides of the side frame 1.
protrudes and the counterweight 10 is guided to the guide rail 7 by this recess 6a, so a wide distance L is required between the side end of the unit weight 5 and the guide rail 7. Therefore, since a large space is required to install the counterweight 10, the hoistway must be widened, and the limited space of the building cannot be used effectively.

In addition, since the conventional counterweight 10 is guided to the guide rail 7 by only the guide shoes 6 at four locations, when the counterweight 10 is vibrated due to an earthquake, the counterweight 10 is guided to the guide rail 7 by only the guide shoes 6 at four locations. The impact caused by the horizontal shaking acts on the guide rail 7 as a concentrated load. Therefore, the amount of deflection of the guide rail 7 becomes large, and the counterweight 10 sometimes comes off the rail.

The present invention is aimed at solving the above-mentioned problems, and provides a counterweight for an elevator that makes effective use of hoistway space and also has the effect of preventing rails from coming off.

[Means for solving problems]

The present invention forms vertical grooves on both sides of the unit weight and configures the side frame in a shape that fits into the vertical grooves, thereby eliminating unnecessary space between the unit weight and the guide rail. By making effective use of the hoistway space and providing the side frame with a guide shoe function, concentrated loads are prevented from acting on the guide rail.

[Effect]

According to the present invention, it is possible to effectively utilize the hoistway space and to prevent the counterweight from coming off the rail.

〔Example〕

An embodiment of the present invention is shown in Fig. 1 and B-B in Fig. 1.
This will be explained with reference to FIG. 2, which is a sectional view taken along the line.

In the figure, 11 is a unit weight, and vertical grooves 11a are formed on both sides. Reference numeral 12 denotes a side frame having a U-shaped cross section so as to fit into the longitudinal groove 11a, and an opening 12a of the side frame is loosely fitted into the guide rail 7. 13 is the side frame 12
It is a low-friction material such as nylon attached to an appropriate location inside the opening 12a, and has a function as a guide shoe.

According to this embodiment, since no wasted space is created between the unit weight 11 and the guide rail 7,
The hoistway space can be used effectively, and it can be installed even in narrow hoistways.

In addition, since the opening 12a of the side frame 12 is loosely fitted into the guide rail 7 over its entire length in the vertical direction, even if the counterweight 20 is vibrated due to an earthquake, the side frame 12a is loosely fitted to the guide rail 7. A distributed load from the frame 12 will act. Therefore,
Compared to the conventional case where a concentrated load is applied, the amount of deflection of the guide rail is much smaller, and there is almost no possibility that the counterweight 20 will come off the rail. Furthermore, since no concentrated load acts on the guide rail, there is no need to increase the strength of the guide rail.
That is, a lightweight guide rail that is not strong can be used.

In the above embodiment, the conventional guide shoe 6 is omitted by giving the low friction material 13 a guide shoe function, but it is of course possible to install the guide shoe 6 or roller guide as in the conventional case.

[Effect of idea]

As explained above, according to the present invention, it is possible to provide a counterweight for an elevator that can effectively utilize the hoistway space and also has the effect of preventing rail derailment.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the elevator counterweight according to the present invention, and Figure 2 is B of Figure 1.
3 is a front view showing a conventional elevator counterweight, and FIG. 4 is a sectional view taken along the line A--A in FIG. 3. 1, 12...Side frame, 2...Top frame, 3...Bottom frame,
5, 11... Unit weight, 6... Guide shoe, 7... Guide rail, 10, 20... Counterweight, 13... Low friction material.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Unit waists are arranged in a stacked manner within a frame constituted by a side frame, an upper frame, and a lower frame, and are arranged along guide rails arranged in parallel on both sides. ,
In a counterweight that travels in the vertical direction, the unit weight has longitudinal grooves formed on both sides, the side frame has a U-shaped cross section, and the outer part of this U-shape fits into the longitudinal groove of the unit weight. A counterweight for an elevator, characterized in that the U-shaped opening is loosely fitted into the guide rail. (2) The counterweight for an elevator as set forth in claim 1 of the utility model registration claim, characterized in that a low friction material is affixed to the opening of the side frame.