JP2003155176A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device comprising a safety device applicable even when a spring buffer is used as a buffer for a car or a counterweight. SOLUTION: The elevator device comprises a spring buffer for the counterweight 15 used during the normal operation arranged in the opposite of the counterweight, and a counterweight drop stopper 16 installed on the spring buffer 15 used during the maintenance operation for preventing the counterweight to drop below the predetermined height. The counterweight drop stopper 16 is arranged at the top of the spring buffer 15 so as to cover the spring buffer 15 from the upper part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator having a car and a counterweight connected to each other by a main rope.

[0002]

2. Description of the Related Art FIG. 5 shows, for example, Japanese Patent Laid-Open Publication No. 2001-2001.
It is a hoistway side view which shows the conventional elevator apparatus published by 151432. Hereinafter, a conventional elevator device will be described based on the description of the above-mentioned publication. In FIG. 5, 1 is an elevator hoistway, 2 is a car, 3 is a counterweight, 4 is the floor of the top floor of the hoistway, and 5 is the lowest floor of the hoistway 1. Floor, 6 is a suspension vehicle, 7 is a rope (main rope) that suspends a car 2 and a counterweight 3 through the suspension vehicle 6,
A maintenance worker who rides on a basket, 9 is a counterweight buffer provided at the bottom of the hoistway 1 and facing the counterweight 3, and 10 is a car provided at the bottom of the hoistway 1 The car shock absorber 11, which is disposed so as to be opposed to, is a balance weight lowering prevention device, and is attached by a plurality of bolts 12 and the like on top of the balance weight shock absorber 9 during maintenance operation. The counterweight shock absorber 9 is in a state of being fully compressed under the load of the counterweight 3.

Reference numeral 13 denotes a car lowering prevention device, which is mounted on the top of the car shock absorber 10 by a plurality of bolts 12 and the like during maintenance operation. It is to be noted that the car shock absorber 10 does not receive the load of the car 2 but only the load of the car descent prevention device 13 and is in a state of being extended.

The counterweight lowering prevention device 11 prevents the counterweight 3 from lowering at a position above the counterweight shock absorber 9, that is, at a predetermined position above the normal lowering position. It should be noted that due to the lowering of the counterweight 3 from being lowered, the raising of the car 2 is restricted at a predetermined position below the normal raised position.

If the maintenance worker 8 rides on the car and continues to raise the car 2 by mistake during maintenance, the maintenance worker 8 may hit his / her head on the ceiling as indicated by the broken line. In order to prevent this, when riding on the ceiling of the car 2 at the time of maintenance, first, the counterweight lowering prevention device 11 is attached to the top of the counterweight shock absorber 9, and the counterweight 3 is installed from the counterweight buffer 9 The balance 2 is hit against the counterweight lowering prevention device 11 first so that the car 2 cannot physically move further upward.

The counterweight lowering prevention device 1 at this time
Since the size of 1 is set to a length that does not hit the head even if the maintenance person 8 is on the car, the maintenance person 8 does not hit his head on the ceiling of the hoistway 1 and is safe. Is. Further, even if the maintenance personnel 14 are in the pit, the car lowering prevention device 13 prevents the car 2 from lowering at a position above the car shock absorber 10, that is, at a predetermined position above a normal lowering position. It is safe that the member 14 does not collide with the car 2.

FIG. 6 is a detailed view of a safety device for preventing the counterweight from descending, which comprises the counterweight shock absorber 9 and the counterweight lowering prevention device 11 in the conventional elevator apparatus described above. In FIG. 6, (a) is a front view of this safety device, and (b) is a side view. The counterweight lowering prevention device includes a counterweight counter bottom plate 11a, a lifting pipe 11b,
It is composed of a mounting plate 11c to be mounted on the counterweight shock absorber 9. Reference numeral 12 is a bolt for positioning and retaining. Further, 9a is a collar-shaped shock absorber top.

FIG. 7 is a perspective view showing the construction of the essential parts of the counterweight lowering prevention device 11 described above.
The c is formed in a C shape so as to fit with the collar-shaped shock absorber top portion 9a. Reference numeral 11d is an insertion hole into which the positioning / separation prevention bolt 12 is mounted.

Cross section C of the descent prevention device 11 for work in the pit and on the car during inspection and installation of the elevator
The character-shaped fitting portion is aligned with the shock absorber top portion 9a, and is horizontally slid to be mounted, and the positioning / separation prevention bolt 12 is attached to the insertion hole 11d. The mounted bolt 12 is locked on the outside of the shock absorber top portion 9a, and the counterweight preventing device 11 is balanced.
Is attached to the shock absorber 9. In the above conventional elevator device, the safety device for preventing the car from descending, including the car cushioning device 10 and the car blocking device 13, has the same structure as the safety device for the counterweight.

[0010]

As described above, the safety device for preventing the counterweight or the car from descending in the conventional elevator system has the fitting portion having the C-shaped cross section of the descending prevention device 11 as described above. In addition, since it is configured to be horizontally slid and mounted, there is a problem that it cannot be applied when the shock absorber is a spring shock absorber having a simple structure without a collar portion.

The present invention has been made in order to solve the above problems, and provides a safety device applicable even when a spring shock absorber is used as a shock absorber for a car or a counterweight. It is an object of the present invention to provide an elevator device provided with the elevator device.

[0012]

The elevator apparatus according to the present invention is provided with a car and a counterweight, which are connected to each other by main ropes and which move up and down the hoistway in opposite directions, and are provided at the bottom of the hoistway. Attached to the counterweight spring shock absorber during normal operation, which is placed opposite to the counterweight, and the counterweight spring shock absorber during maintenance operation, so that the counterweight does not descend beyond a predetermined position. The counterweight lowering device is attached to the top of the counterweight spring shock absorber so as to cover it from above.

Further, the above-described counterweight lowering prevention device includes an opening and a bar-shaped stopper fitted and inserted into the opening, and the bar-shaped stopper is externally fitted and inserted into the opening of the counterweight lowering prevention device. In addition, it is attached to the spring buffer for the counterweight by being locked between the wire diameters of the spiral springs of the spring buffer for the counterweight.

Further, the above-mentioned counterweight lowering prevention device has a tubular raised pipe and each has an opening,
A plurality of shock absorber mounting plates that are attached to the lower end of the raised pipe, and the shock absorber mounting plates cover the counterweight spring shock absorber from above and fit into the opening of the shock absorber mounting plate from the outside. The spring buffer for a counterweight is inserted into the spring buffer for a counterweight, and is attached to the spring buffer for a counterweight by a rod-shaped stopper locked between the wire diameters of the spiral springs.

Further, the counterweight lowering prevention device is
The counterweight spring shock absorber is covered from above and is rotated with respect to the counterweight spring shock absorber so that it can be attached to the counterweight spring shock absorber.

In the elevator apparatus according to the present invention, a car and a counterweight, which are connected to each other by main ropes and move up and down in the hoistway in opposite directions, are provided at the bottom of the hoistway, and are arranged to face the car. Equipped with a car spring shock absorber during normal operation and a car descent prevention device that is attached to the car spring shock absorber during maintenance operation to prevent the car from descending beyond a predetermined position. The car descent prevention device is mounted so as to cover the top of the car spring shock absorber from above.

Further, the above car descent prevention device includes an opening and a rod-shaped stopper fitted and inserted into this opening. The rod-shaped stopper is fitted into the opening of the car descent prevention device from the outside. The spring shock absorber for a car can be attached to the spring shock absorber for a car by being locked between the wire diameters of the spiral springs.

Further, the above car descent prevention device is provided with a tubular raising pipe and a plurality of shock absorber mounting plates each having an opening portion and attached to the lower end portion of the raising pipe. The device mounting plate covers the car spring shock absorber from above, is fitted into the opening of the shock absorber mounting plate from the outside, and is locked between the wire diameters of the spiral springs of the car spring shock absorber. It is adapted to be attached to the above car spring shock absorber by a rod-shaped stopper.

Further, the car descent preventing device is adapted to be attached to the car spring shock absorber by covering the car spring shock absorber from above and being rotated with respect to the car spring shock absorber. .

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an elevator apparatus according to the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1 is a side view showing the configuration of a counterweight or a car descent prevention safety device used in an elevator device according to Embodiment 1 of the present invention. The rest of the structure of the elevator device except for the counterweight or the car lowering safety device is the same as the structure described in FIG. Also,
The configuration of the safety device shown in FIG. 1 can be used as a safety device for a counterweight and as a safety device for a car, but in the first embodiment, the case of using the safety device for a car will be described. .

In FIG. 1, reference numeral 15 is a spring shock absorber for a counterweight, which is provided at a lower portion of the hoistway so as to face the counterweight. This balance weight spring shock absorber 15 is used during normal operation of the elevator.
It serves to prevent the counterweight from falling beyond a predetermined range. On the other hand, 16 is a counterweight lowering prevention device, which is attached to the spring buffer 15 for the counterweight during maintenance operation of the elevator so that the counterweight descends beyond an allowable range for ensuring the safety of maintenance personnel. It plays a role of preventing.

The counterweight lowering preventing device 16 is
The raising pipe 16b, the counter lower surface contact plate 16a located on the upper end surface of the raising pipe 16b and abutting the counterweight, and the counterweight spring buffer 15 located on the lower end of the raising pipe are covered from above. It is composed of a mounting plate 16c for fixing the counterweight lowering prevention device 16. Further, each of the mounting plates 16c has an opening 16d. FIG. 2 is a perspective view showing such a counterweight lowering prevention device 16.

In FIG. 1, reference numeral 17 denotes a rod-shaped stopper such as a bolt, which is fitted into the opening 16d of the mounting plate 16c from the outside and has the wire diameter of the spiral spring of the counterweight spring shock absorber 15. It is inserted in between and serves to fix the mounting plate 16c to the counterweight spring shock absorber 15. FIG. 3 thus shows the rod-shaped stopper 17
FIG. 2 is a cross-sectional view taken along the arrow A in FIG. 1, showing a state in which the lowering prevention device 16 is fixed to the spring shock absorber 15 by.

Next, when performing an operation for maintenance of the elevator device, the counterweight lowering prevention device 16 is
An example of an operation for fixing the balance weight spring shock absorber 15 will be described. First, the mounting plate 16c of the counterweight lowering prevention device 16 is arranged so as to cover from the upper portion of the counterweight spring shock absorber 15. Next, the rod-shaped stoppers 17 are attached to the openings 16d of the respective mounting plates 16c.
The lowering prevention device 16 to the spring shock absorber 15 by inserting it into the spring shock absorber 15 from the outside and penetrating the mounting plate 16c and inserting it into the wire diameter of the spring of the counterweight spring shock absorber 15 (that is, the gap of the helical spring). Fix it.

By the above operation, the fall prevention device 16 is positioned with respect to the spring shock absorber 15 and is fixed so as not to come off. However, when the lowering prevention device 16 is more firmly fixed to the spring shock absorber 15, the lowering prevention device 16 is fixed to the spring shock absorber 15 after fixing the lowering device 16 to the spring shock absorber 15 by the above operation. And rotate it to move downward. As a result, the rod-shaped stopper 17 bites into the spring of the spring shock absorber 15 at a deeper position, so that the lowering prevention device 16 is moved to the spring shock absorber 15.
In addition, it can be firmly fixed so that there is no rattling.

When the rod-shaped stopper 17 is inserted between the wire diameters of the springs of the spring shock absorber 15, the stroke of the spring is not obstructed even during the shock absorbing operation of the spring shock absorber 15.
It is also possible to regulate the insertion of the rod-shaped stopper 17 at an appropriate position and adjust it so as not to hinder the buffer performance of the spring shock absorber. FIG. 4 shows a state in which the descent prevention device 16 is thus attached to the spring shock absorber 15,
FIG. 3 is a partial cross-sectional view of a balance weight lowering prevention safety device according to the present invention.

In the above embodiment, the counterweight lowering device 16 is provided with a plurality of mounting plates 16c to be mounted on the spring shock absorber 15.
The diameter of the lower portion of the spring shock absorber 15 may be expanded and an opening may be provided so as to cover the upper portion of the spring shock absorber 15, and the rod-like stopper 17 may be fitted into the opening to be attached to the spring shock absorber 15. In addition, the cross-sectional shape of the lower portion of the descending prevention device 16 may be circular or quadrangular.

As described above, in the elevator apparatus according to the first embodiment of the present invention, since the descending prevention safety device for the counterweight is constructed as described above, when the spring buffer is used as the buffer for the counterweight. However, it is possible to easily install the counterweight lowering prevention device.

Embodiment 2 In the above-mentioned Embodiment 1, the spring shock absorber 1 for counterweights is used.
The configuration in which the counterweight lowering prevention device 16 is attached to the vehicle 5 and used as a lowering prevention safety device for the counterweight of the elevator device has been described. However, the configuration of the safety device that is a combination of the spring shock absorber 15 and the descent prevention device 16 described above can also be used as a descent prevention safety device for a car of an elevator device.

That is, as the car shock absorber for limiting the descent of the car within the predetermined range during the normal operation, the same structure as the spring shock absorber 15 described above is used. Further, as a car lowering prevention device, which is attached to the car spring shock absorber during the maintenance operation of the elevator to prevent the car from descending beyond the allowable range for ensuring the safety of maintenance personnel, the above-mentioned balance weight is used. The same structure as the fall prevention device 16 is used. With such a configuration, even when the spring shock absorber is used as the car shock absorber, the car descent prevention device can be easily attached to the car spring shock absorber.

Third Embodiment In the above first and second embodiments, the spring shock absorber 1 is used.
The configuration in which the descent prevention device 16 is attached to No. 5 and is used for either the descent prevention safety device for the counterweight of the elevator device or the descent prevention safety device for the car has been described. However, such a structure in which the fall prevention device 16 is attached to the spring shock absorber 15 can be simultaneously used for both the fall prevention safety device for the counterweight of the elevator device and the fall prevention safety device for the car. With such a configuration, even when the spring shock absorbers are used for both the counterweight shock absorber and the car shock absorber, it is possible to easily attach the corresponding fall prevention devices.

[0032]

According to the elevator device of the present invention,
Since the counterweight lowering device for the balance (car) can be mounted so as to cover the top of the spring buffer for the balance weight (car) from above, a spring buffer was used as the buffer for the balance weight (car). Even in such a case, it is possible to easily install the counterweight (car) lowering prevention device.

Further, the counterweight lowering device (cage) includes an opening and a bar-shaped stopper fitted and inserted into the opening, and the bar-shaped stopper is provided outside the counterweight lowering device. Since it is fitted into the spring shock absorber for the balance weight (car) and locked between the wire diameters of the spiral springs of the spring shock absorber for the balance weight (car), There is an effect that the above attachment can be performed more reliably.

Further, in the counterweight lowering device, a balance buffer (car) spring shock absorber is covered from above, and is rotated with respect to the balance weight (car) spring shock absorber to obtain a balance weight (car). Since it can be attached to the spring shock absorber for), there is an effect that a stronger attachment is possible.

[Brief description of drawings]

FIG. 1 is a side view showing a counterweight lowering prevention safety device according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a counterweight lowering prevention device according to the first embodiment of the present invention.

3 is a cross-sectional view showing an arrow in FIG.

FIG. 4 is a partial cross-sectional view showing the counterweight lowering prevention safety device according to the first embodiment of the present invention.

FIG. 5 is a side view of a hoistway showing a configuration of a conventional elevator device.

FIG. 6 is a front view and a side view showing a safety device of a conventional elevator device.

FIG. 7 is a perspective view showing a counterweight lowering prevention device of a conventional elevator device.

[Explanation of symbols]

1 elevator hoistway Two baskets 3 counterweight 6 suspension car 7 main rope 15 Counterweight shock absorber 16 Counterweight lowering prevention device 16b raised pipe 16c mounting plate 16d opening 17 Bar stopper

Claims (8)

[Claims] 1. A car and a counterweight that are connected to each other by a main rope to move up and down in a hoistway in opposite directions, and a normal operation provided at the bottom of the hoistway and arranged to face the counterweight. And a counterweight lowering prevention device that is attached to the counterweight spring shock absorber at the time of maintenance, and that is mounted on the counterweight spring shock absorber during maintenance operation and that prevents the counterweight from descending beyond a predetermined position. An elevator apparatus comprising: the counterweight lowering prevention device, which is attached to the top of the counterweight spring shock absorber so as to cover it from above. 2. The counterweight lowering prevention device includes an opening and a rod-shaped stopper fitted and inserted into the opening.
The bar-shaped stopper is fitted into the opening of the counterweight lowering prevention device from the outside and is locked between the wire diameters of the spiral springs of the spring buffer for the counterweight, thereby the spring for the counterweight. The elevator apparatus according to claim 1, wherein the elevator apparatus is attached to a shock absorber. 3. The counterweight lowering prevention device comprises a tubular raised pipe and a plurality of shock absorber mounting plates attached to the lower end of the raised pipe, each shock absorber mounting plate having an opening. The device mounting plate covers the balance weight spring shock absorber from above, and is fitted into the opening of the shock absorber mounting plate from the outside to engage between the wire diameters of the spiral springs of the balance mass spring shock absorber. The elevator device according to claim 1, wherein the elevator device is attached to the counterweight spring shock absorber by a rod-shaped stopper that is stopped. 4. The balance weight lowering prevention device covers the balance weight spring shock absorber from above and is rotated with respect to the balance weight spring shock absorber so that the balance weight spring shock absorber is rotated. The elevator device according to claim 2 or 3, wherein the elevator device is attached. 5. A car and a counterweight that are connected to each other by a main rope to move up and down the hoistway in opposite directions, and a balance weight that is provided at the bottom of the hoistway and is arranged to face the car during normal operation. Elevator device equipped with a car spring shock absorber and a car descent prevention device that is attached to the car spring shock absorber during maintenance operation and that prevents the descent of the car from falling beyond a predetermined position. The elevator lowering device is attached so as to cover the top of the car spring shock absorber from above. 6. The car lowering prevention device includes an opening and a rod-shaped stopper fitted and inserted into the opening, and the rod-shaped stopper is inserted into the opening of the car lowering prevention device from the outside and the 6. The elevator apparatus according to claim 5, wherein the elevator apparatus is attached to the car spring shock absorber by being locked between the wire diameters of the spiral springs of the car spring shock absorber. 7. The car lowering prevention device is attached to a tubular raised pipe and a lower end portion of the raised pipe,
A plurality of shock absorber mounting plates each having an opening, and the plurality of shock absorber mounting plates cover the cage spring shock absorber from above, and are fitted from the outside into the openings of the shock absorber mounting plate. 6. The elevator apparatus according to claim 5, wherein the elevator spring shock absorber for a car is attached to the spring shock absorber for a car by a rod-shaped stopper that is locked between wire diameters of a spiral spring of the car spring shock absorber. 8. The car descent prevention device is attached to the car spring shock absorber by covering the car spring shock absorber from above and rotating with respect to the car spring shock absorber. The elevator apparatus according to claim 6 or 7, which is characterized in that.