JPH0547166Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to an improvement of an elevator hoistway ladder.

[Conventional technology]

FIGS. 3-4 show a ladder used in a conventional elevator hoistway, and in particular are views of the pit portion of the hoistway. As shown in the figure, a ladder type ladder 3 is fixed to the wall 2 of a pit 1 in the hoistway, and a worker can enter the hoistway to inspect the elevator.
When carrying out work such as adjustment or maintenance, it is possible to descend into the pit 1 from the vehicle sill 4 along this ladder 3. 5 is a car that goes up and down in the hoistway;
6 is the car floor at the bottom of the car 5.

[Problem that the invention aims to solve] However, recently there has been a demand to minimize the ratio of the elevator area to the floor area of the building, so if the hoistway space is small, In some cases, there is no room to install a ladder ramp that protrudes into the hoistway, and even if it is possible to install a ladder, if there is not enough room to install a ladder, make sure the ladder is large enough to allow your feet to hang. The problem is that it is difficult.

Therefore, a retractable ladder has been proposed, for example, as shown in Japanese Utility Model Application Publication No. 134600/1983.

However, when using a retractable ladder for this purpose, it is pulled out from the wall, but if you forget to leave it pulled out and stored even after the work is completed, the elevator car and the descending elevator car will protrude into the pit. There was a problem that there was a risk that the basket or ladder would break due to collision with the ladder.

This invention was made in order to solve these problems, and the elevator hoistway is easy to handle when pulling out and storing the ladder, and the elevator car and the ladder do not break even if the ladder is forgotten to be stored. The purpose is to obtain a storage mechanism for a utility ladder.

[Means for solving problems]

The storage mechanism for an elevator hoistway ladder according to this invention is such that the ladder is attached to the wall of the elevator hoistway, the ladder is movable forward and backward with respect to the wall via a link mechanism, and the ladder has a contactable car side contact. The ladder is attached to the elevator car facing the direction of the ladder, and at least one of the ladder-side contact portion and the car-side contactor is formed with an inclined surface so that the ladder is retracted toward the wall side by the above-mentioned contact. It is.

[Effect]

In this invention, since the ladder and the hoistway wall are connected by a link mechanism, the ladder can move forward and backward with respect to the wall, and in addition, at least one of the ladder-side contact portion and the car-side contactor has an inclined surface. Since the ladder is formed, the ladder moves toward the wall surface as the car moves and is stored.

〔Example〕

An embodiment of this invention will be described below based on FIGS. 1 and 2. In the figure, a pit 1, a wall 2, a vehicle sill 4, a car 5, and a car floor 6 of the hoistway are completely the same as those in the conventional system. 7 is a folding ladder attached to the hoistway wall surface 2. That is,
A link mechanism 8 is provided at the top and bottom of the ladder 7, and each link mechanism 8 in this figure constitutes a parallel crank mechanism by a pair of links 9, the wall surface 2, and the ladder 7. As a result, the ladder 7 can freely move forward and backward while maintaining a parallel position to the wall surface 2, and can be folded. 10
are pins loosely inserted into both ends of each link 9.

A roller 11 is attached to the lower end of the ladder 7 and rolls on the floor 12 of the pit 1 while supporting the ladder 7. This roller 11 is provided to move the ladder 7 forward and backward slightly. 13 is a safety switch attached to the wall surface 2, and when the ladder 7 is stored on the wall surface 2 side, the ladder 7 comes into contact with this safety switch 13 and this safety switch 13 is turned on.

Reference numeral 14 denotes a car-side contact that is attached to the elevator car 5 facing toward the ladder 7 and can come into contact with the ladder 7, and this figure shows a case where it is attached to the car floor 6. Reference numeral 15 denotes a ladder-side contact portion that comes into contact with the car-side contactor 14, and in this embodiment is the upper end portion of the ladder.

16 is a ladder side contact part 15 and a car side contactor 14
The inclined surface 16 is formed on at least one of the two sides and has the function of retracting the ladder 7 to the wall surface 2 side by the above-mentioned contact.In this embodiment, the inclined surface 16 is formed on the car side contact 14. are doing.

Next, the operation of the above-described embodiment configured as above will be explained. During normal elevator operation, the ladder 7 is stored in the state shown by the two-dot chain line in FIGS. 1 and 2. At this time, the safety switch 13
It is turned on and the elevator is ready for operation.

Therefore, when using the ladder 7, it is sufficient to stop the car 5 and then pull out the ladder 7 to the position shown by the solid line in the figure. This turns off the safety switch 13 and prevents the elevator from operating, thereby ensuring safety.

In order to store the drawn-out ladder 7 on the wall 2 side again, if the operator pushes the ladder 7 towards the wall 2 side,
Due to the operation of the link mechanism 8 and the rolling of the rollers 11, the ladder 7 moves toward the wall surface 2 and is thereby retracted, and the safety switch 13 is turned on and the elevator becomes operable again.

Next, in the unlikely event that you forget to store the ladder, the safety switch 13 malfunctions, and the car 5 descends with the ladder 7 still pulled out. Side contact 14
When the slope 16 of the car 5 comes into contact with the ladder side contact portion 15 and the car 5 moves further downward, the slope 16 of the car side contact 14 presses the ladder 7 against the wall surface 2 side and moves it, and by this action, the ladder 7 automatically moves to wall 2
It will be stored on the side.

Although FIG. 1 shows the case where the inclined surface 16 is a flat surface, it may be a curved surface. In addition, the inclined surface 16
may be formed on the ladder side contact portion 15 side.

By the way, in the above embodiment, the ladder 7 is installed in the pit 1 at the bottom of the hoistway, but the ladder is installed at the top of the hoistway, and the car side contactor is placed on the car ceiling in the direction of the ladder (that is, in the upward direction). ) may be provided.

Further, the link mechanism 8 may be any mechanism as long as it can fold the ladder 7, and is not limited to a parallel crank mechanism.

Further, in order to prevent the stored ladder 7 from coming out by itself, it is preferable that the ladder 7 is fastened to the wall surface 2 using a fastening member or a stopper after being stored.

[Effect of idea]

As explained above, this invention has a foldable ladder and a car-side contact on the car, so that when the car moves, the ladder is automatically retracted, and in the unlikely event that the ladder is retracted. forget,
Furthermore, even if the elevator is operated due to a failure of the safety switch, no accident will occur in which the car or the ladder is damaged.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of this invention, Fig. 2 is a plan view thereof, Fig. 3 is a view equivalent to Fig. 1 showing a conventional elevator hoistway ladder, and Fig. 4 is a plan view thereof. This is a diagram equivalent to Figure 2. 2... Wall surface, 5... Elevator car, 7... Ladder, 8... Link mechanism, 14... Car side contact,
15... Ladder side contact part, 16... Inclined surface,
In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A ladder attached to a wall surface of an elevator hoistway via a link mechanism so as to be movable forward and backward with respect to the wall surface, and a car contactor attached to the elevator car facing the direction of the ladder and capable of contacting the ladder. An elevator hoistway ladder, characterized in that at least one of the ladder-side contact portion and the car-side contactor is formed with an inclined surface so that the ladder is stored on the wall side by the contact. Storage mechanism.