JP2000255940A - Balance weight for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a balance weight for an elevator capable of securing a counter clearance easily and efficiently. SOLUTION: A balance weight is constituted such that a mounting position of an adjustable base 1e to a frame body 1b is variable between a contact position and a non-contact position to a shock absorber 7. When a main rope is stretched, and a counter clearance should be secured, the counter clearance is secured easily by mounting the adjustable base 1e to the non-contact position to the shock absorber 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an elevator counterweight.

[0002]

2. Description of the Related Art The structure of a general elevator of the elevator type will be described with reference to FIG.

FIG. 4 is a vertical sectional view of a hoistway showing the structure of a general swing-type elevator.

In the figure, the other end of the main rope 2 is connected to the upper part of the counterweight 1, and a car 5 is connected to one end of the main rope 2 via a deflecting wheel 3 and a hoisting machine 4. The hoisting machine 4 transmits driving force via the main rope 2 so that the car 5 and the counterweight 1 are lifted and lowered in the hoistway 6 in a hoisting manner.

[0005] At the bottom of the hoistway 6, there is provided a shock absorber 7 which comes into contact with the bottom of the counterweight 1 when the counterweight 1 falls and reduces the impact due to collision.

As shown in FIG. 3, the counterweight 1 is attached to a sub-weight 1a and a bottom of a frame 1b on which the sub-weight 1a is mounted via a fastener 1d so as to be able to contact the shock absorber 7. It is formed to have an adjustment table 1c. Here, FIG. 3 is a perspective view showing a main part of a conventional counterweight.

Since the main rope 2 elongates as time elapses after the elevator is installed, a dimension l between the adjusting table 1c and the shock absorber 7 shown in FIG.
(Counter clearance) becomes smaller.

When the main rope 2 further extends, the adjusting table 1c comes into contact with the shock absorber 7 just before the car 5 rises to the landing 8 on the top floor, so that the car 5 cannot be raised or lowered. Conventionally, when the counter clearance 1 becomes equal to or less than a predetermined value (about 300 to 500 mm), the adjustment table 1c is removed to secure the counter clearance l.

An example of this type of technology is disclosed in Japanese Patent Application Laid-Open No. 7-2
No. 67537 discloses the disclosure.

[0010]

However, according to the above-described conventional method for securing the counter clearance l, the adjusting table 1
c must be removed and stored somewhere.

Accordingly, the change in weight of the counterweight 1 due to the removal of the adjusting table 1c causes the operating efficiency of the elevator to deteriorate, and the transportation work to the storage location, for example, the bottom of the hoistway 6, becomes complicated. In this case, however, there is a disadvantage that the adjusting table 1c is corroded and cannot be used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned disadvantages, and an object of the present invention is to provide an elevator counterweight which can easily and efficiently secure a counter clearance.

[0013]

According to the present invention, in order to achieve the above object, one end of a main rope connected to a car is connected to the other end of a main rope via a hoist and driven by the hoist. An adjustment table that receives force and moves up and down the hoistway in a hoisting manner with the car, and when falling, comes into contact with a shock absorber installed at the bottom of the hoistway, and a frame body that attaches the adjustment table to the bottom. And the adjusting stand is attached to the bottom of the frame so as to be displaceable between a position in contact with the shock absorber and a position not in contact with the shock absorber.

In the present invention, as described above, the elevator counterweight is configured so that the mounting position of the adjustment table to the frame body can be displaced between a position where it can contact the shock absorber and a position where it does not contact the shock absorber. When it is desired to secure the counter clearance by extending, if the adjusting table is attached to a position not in contact with the shock absorber, it can be easily ensured.

Further, since the adjusting table can be kept attached to the frame body, it is not necessary to transport to the storage place and secure the storage place.

Further, since the weight of the entire counterweight does not change even after the counter clearance is secured, it is possible to prevent the operating efficiency of the elevator from deteriorating.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIGS. 1 and 2 are enlarged perspective views of a main part showing a counterweight according to an embodiment of the present invention.

In the drawings, the same parts as those of the above-mentioned prior art are denoted by the same reference numerals, and description thereof will be omitted.

The adjusting stand 1e is attached to the lower end of the counterweight 1, and adjusts the distance l between the counterweight 1 and the shock absorber 7 so that it is always within a predetermined value. It is mounted via mounting bolts 13e, 14e.

One of the mounting holes of the counterweight adjusting stand 1e is a slidable long hole 11e, and the other 12e is slidable and is notched to the end so as to be detachable without removing the mounting bolt 14e.

At the bottom of the counterweight frame 1b, one mounting hole 15e for the adjustment table 1e is provided on one side.

In such a configuration, when the main rope 2 is stretched and the distance l ₁ between the counterweight 1 and the shock absorber 7 becomes smaller than a predetermined value, first, the mounting bolt 14e is removed, and the mounting bolt 14e is temporarily inserted into the mounting hole 15e. Stop it.

Next, the mounting bolt 13e is loosened, and the adjustment base 1e is rotated to the left in the drawing around the mounting bolt 13e. At this time, in the mounting hole 15e on the left side of the bottom of the frame 1b,
Since there is the mounting bolt 14e temporarily fixed earlier, the adjustment base 1e is slid and inserted through the notch hole 12e of the adjustment base 1e, and the adjustment bolt 1e is tightened to complete the movement of the adjustment base 1e. interval l ₂ between the secured.

As described above, the counterweight according to the present invention allows the adjustment stand 1e to be attached to a position that is not in contact with the shock absorber 7.
Counter clearance l ₂ is easily ensured.

Further, since the mounting bolts 13e are not completely removed, there is no risk of the adjusting table 1e dropping, so that the car 5 can be stopped on the middle floor and the position of the adjusting table 1e can be changed from above the car. A person can very easily and safely secure the counter clearance.

Further, since the weight of the entire counterweight does not change even after the counter clearance is secured, a decrease in the operating efficiency of the elevator can be prevented.

[0028]

According to the present invention, since the counterweight of the elevator is constructed as described above, the counter clearance can be easily and efficiently secured.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a main part showing a counterweight according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part showing a counterweight according to an embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of a conventional counterweight.

FIG. 4 is a vertical sectional view of a hoistway showing the structure of a general hanging elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Counterweight 1e Adjustment stand 2 Main rope 4 Hoisting machine 5 Riding basket 7 Shock absorber

Claims (1)

[Claims] An end of a main rope connected to a car is connected to the other end of the main rope via a hoist, and a driving force is transmitted by the hoist to allow the car and the hoistway to move in the hoistway. The elevator counterweight, which includes an adjustment table that comes into contact with a shock absorber installed at the bottom of the hoistway at the time of falling, and a frame that attaches the adjustment table to the bottom of the adjustment table, A counterweight for an elevator, wherein a platform is mounted on the bottom of the frame so as to be displaceable between a position in contact with the shock absorber and a position not in contact with the shock absorber.