JP4447962B2 - Elevator car holding device - Google Patents

Description

  The present invention relates to an elevator car holding device for securing a safety space between a car ceiling and a hoistway top when maintenance work is performed on a car during maintenance.

FIG. 4 is a schematic view showing the structure of a conventional machine room-less elevator, in which the car is located on the top floor. FIG. 5 is a schematic view showing a state in which a top safety space is secured during work on the car during maintenance. In the figure, A is a hoistway, 6 is a hoisting machine provided in a pit B of the hoistway A, 7 is a car that moves up and down in the hoistway, and a suspension wheel 7a is provided at the lower part. 8 is a counterweight that moves up and down in the hoistway, and a suspension wheel 8a is provided on the upper part. 9 is a counterweight buffer provided in the pit B of the hoistway A, and 10 is a counterweight buffer spacer installed between the lower end of the counterweight 8 and the upper portion of the counterweight buffer 9 during maintenance. Reference numeral 11 denotes a main rope having both ends fixed to the top of the hoistway A. The main rope 11 exits from one fixed end and is folded back by a return wheel 12a provided at the top of the hoistway via a suspension wheel 7a below the car 7, and is further wound around the hoisting machine 6 to be taken up by the hoistway. It is turned back again by a return wheel 12b provided at the top, and is directed to the other fixed end via a suspension wheel 8a at the upper part of the counterweight 8. 13 is an upper space on the car formed between the car 7 and the hoistway top during normal operation, and 13a is a top safety space on the car formed between the car 7 and the hoistway top at the time of maintenance. Reference numeral 14 denotes a top floor hall, and 15 denotes a bottom floor hall.
In the state shown in FIG. 4, the upper space 13 on the car has a minimum dimension for ensuring the safety of equipment and passengers during normal operation of the elevator.
Further, in order to secure the top safety space 13a on the car at the time of maintenance, as shown in FIG. 5, the maintenance staff enters the hoistway pit B from the lowest floor landing 15 before moving on the car. The counterweight buffer spacer 10 is installed between the counterweight 8 and the counterweight buffer 9 to secure the top safety space 13a on the car and then start the work on the car. That is, in the maintenance / inspection mode, the counterweight 8 is set so that the maintenance staff does not collide even when the car 7 moves to the top floor by installing the counterweight buffer spacer 10. A switch (not shown) is provided for electrically stopping the car 7 when it is moved to the position. The work of attaching the counterweight buffer spacer 10 is an important work as a protective device in the event of a failure of the car stop holding function (brake) in addition to the failure of the electrical safety switch.
In addition, as a conventional technology, a dam weight cab fixing device that fixes the grip device to an arbitrary position of the main rail and connects the grip device and the cab with a suspension member, and the raising / lowering operation of the cab when the cab door is open. There has been proposed an elevator car position fixing device that can eliminate the fear of (see, for example, Patent Documents 1 and 2).

JP-A-8-301548 Japanese Patent Laid-Open No. 10-59662

  As described above, in order to ensure safety in the work on the car, it is well recognized that it is important to pre-install the counterweight buffer spacer, but it will be completed in a short time. In such a light work on a cage, it is troublesome to attach and remove the counterweight buffer spacer, and it is feared that the procedure will be omitted.

  The present invention has been made to solve the above-described problems. When performing maintenance work on the car during maintenance, the top safety space between the car ceiling and the hoistway top can be easily secured in a short time. There is provided an elevator car holding device which can be used.

In the elevator car holding device according to the present invention, when performing maintenance work on the car during maintenance, a safety space is ensured between the car upper part and the hoistway top,
The top stopper is detachably installed at a position facing the main guide rail at the top of the car, and the car is lightly set from above in a tapered gap formed between the top stopper and the main guide rail during maintenance. A wedge-shaped car lock key that enables the upper work and the top of the main guide rail fixed so as to face the head of the car lock key. When the car cannot be stopped by the maintenance mode top floor stop switch, it rises further. The cage lock key head abuts, and the cage lock key wedge-shaped portion is pushed into the tapered gap of the top stopper and held by the main guide rail, thereby providing an operating arm that prevents the cage from rising . Is.

  The top stopper is always fixed to the upper beam of the car, and the car lock key is set during maintenance.

  Further, the top stopper and the car lock key are accommodated in a storage frame provided at a predetermined position on the upper side of the car, and an operation changeover switch capable of switching between normal operation and on-car operation permission is provided in this storage frame.

  Further, a lock key detection switch for detecting that the car lock key is set on the top stopper is provided, and when the car lock key is detected set on the top stopper, operation on the car is permitted.

  According to the elevator car holding device of the present invention, it is not necessary to install and remove the counterweight buffer spacer that has been performed in the hoistway pit as in the prior art. Work time can be greatly shortened, and safety pre- and post-action measures that are often omitted can be surely performed.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a main part structure of an elevator car holding device in Embodiment 1 for carrying out the present invention, and FIG. 2 shows a main part structure of an elevator car holding device in Embodiment 1 of the present invention. FIG. 3 is a side view showing the main structure of the elevator car holding device according to Embodiment 1 of the present invention.
1 to 3, an elevator car 7 is guided up and down by a pair of left and right main guide rails 4 erected in a hoistway, and is composed of a car room (not shown) and a car frame that supports the car. It is configured. The car frame is composed of an upper beam 5, a lower beam (not shown), and a vertical column (not shown). In the elevator car holding device according to the present invention, when work on the car for maintenance is required, the top stopper 1 is detachably installed at a position facing the main guide rail 4 of the car upper beam 5, and this top part By lightly setting the wedge-shaped car lock key 2 from above in a tapered gap 1a formed between the stopper 1 and the main guide rail 4, the work on the car can be performed very easily. Reference numeral 3 denotes an L-shaped operating arm fixed to the upper end of the main guide rail 4 so as to face the head of the car lock key 2. Even when the car 7 cannot be stopped by the maintenance mode top floor stop switch (not shown), the car 7 moves up to the position of the operating arm 3 and the car lock key 2 When the position is exceeded, as shown in FIG. 2, the operating arm 3 comes into contact with the head of the car lock key 2, and the wedge-shaped part of the car lock key 2 is pushed into the tapered gap 1 a of the top stopper 1. Since the cage 7 is prevented from rising by being held at 4, the top safety space 13a for maintenance as shown in FIG. 5 can be secured.
Therefore, it is not necessary to install and remove the counterweight buffer spacer that has been performed in the hoistway pit as in the past, and the work time can be greatly shortened and shortened when working on the car for a short time. Safe and proactive measures that are prone to safety can be reliably implemented.

Embodiment 2. FIG.
In the first embodiment, the top stopper 1 is detachably installed on the car upper beam 5 at the time of maintenance. However, the present invention is not limited to this, and the top stopper 1 is fixed to the car upper beam 5 from the beginning to perform the work on the car. An equivalent function can be realized by setting the car lock key 2 sometimes.

Embodiment 3 FIG.
The top stopper 1 and the car lock key 2 are accommodated in a storage frame (not shown) provided at a predetermined position above the car 7, and an operation changeover switch (not shown) is attached to the storage frame. The normal operation and the on-car operation permission may be switched by a changeover switch.

Embodiment 4 FIG.
A lock key detection switch (not shown) for detecting that the car lock key 2 is set to the top stopper 1 is provided, and if the car lock key 2 is not set to the top stopper 1, the operation on the car is not permitted. Also good.

It is a perspective view which shows the principal part structure of the elevator car holding | maintenance apparatus in Embodiment 1 of this invention. It is a rear view which shows the principal part structure of the elevator car holding | maintenance apparatus in Embodiment 1 of this invention. It is a side view which shows the principal part structure of the elevator car holding | maintenance apparatus in Embodiment 1 of this invention. It is the schematic which shows the structure of the conventional machine room less elevator, and the state which the car was located in the top floor is shown. It is the schematic which shows the state which ensured the top safety space at the time of the work on the cage | basket | car at the time of a maintenance.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Top part stopper 1a Tapered clearance 2 Car lock key 3 Actuating arm 4 Main guide rail 5 Car upper beam 6 Hoisting machine 7 Car
7a, 8a Suspension wheel 8 Counterweight 9 Counterweight buffer 10 Counterbalance buffer spacer 11 Main rope 12a, 12b Return wheel 13 Upper space
13a Top safety space 14 Top floor hall 15 Bottom floor hall

Claims (4)

When performing maintenance work on the car during maintenance, in the elevator car holding device that secures a safety space between the car upper part and the hoistway top,
A top stopper detachably installed at a position facing the main guide rail at the top of the car;
A wedge-shaped car lock key that allows the car to work on the car by being lightly set from above in a tapered gap formed between the top stopper and the main guide rail during maintenance;
Fixed to the upper end of the main guide rail so as to face the head of the car lock key. When the car cannot be stopped by the maintenance mode top floor stop switch and further rises, the head of the car lock key abuts. An actuating arm that prevents the car from being lifted by the wedge-shaped part of the car lock key being pushed into the tapered gap of the top stopper and held by the main guide rail ;
An elevator car holding device characterized by comprising: Top stoppers are fixed to the beam on a constantly cage, cage holding device according to claim 1 Symbol placement of the elevator, characterized in that during maintenance in which the car lock key is set. The top stopper and the car lock key are housed in a storage frame provided at a predetermined position on the top of the car, and an operation changeover switch for switching between normal operation and on-car operation permission is provided in the storage frame. The elevator car holding device according to claim 1 or 2 . A lock key detection switch for detecting that the car lock key is set to the top stopper is provided, and when the car lock key is detected to be set to the top stopper, the operation on the car is permitted. The elevator car holding device according to any one of claims 1 to 3 .

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