JPH0229592B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator system, and more particularly to a reliable interlock that prevents manual opening of a floor door from within a car when the car is between floors. It is something.

To facilitate car evacuation, elevator systems are designed to allow the car door to be manually pulled open by the passenger and in any car position. If the car door is open, the floor door latch or interlock (this interlock prevents anyone on the floor from opening the floor door unless the car is close to the floor). can be released by the passenger, allowing the passenger to pull open the floor door. However, if the car is located far above the floor level when doing this, a large space will be created between the bottom of the car and the floor leading to the hoistway, which will prevent passengers from trying to escape from the car. There is a risk of slipping from this large space into the hoistway when attempting to descend to the floor that is far below the car.

The car is therefore in the "unsafe zone" (too far above the floor for passengers to reach the floor)
If the passenger opens the car door, prevent the passenger from pulling the floor door far enough to get out of the car.
Moreover, the safety mechanism allows the door to be opened from the floor no matter where the car is located, in other words, the passenger can only escape if the car is in the "safe zone" (close to the floor). A system is needed to do this. A mechanism to meet this need must also allow the passenger to open the car door sufficiently to contact someone on the floor and receive emergency equipment.

Systems have also been proposed that satisfy most of these needs, in which a safety interlock locks the car door and the floor door so that the closed floor door stops the car door from opening. The doors on the floor are engaged with each other. However, in order to open the car door, the floor door must be opened at the same time.

In the improved system of the present invention, the car door can be opened by a passenger at any location, and for the safety of the passengers, the floor door is opened only to the extent necessary for communication and the transfer of tools. The rationale for this is clear. This means that unless the floor door is almost completely closed and passengers cannot reach the floor, the dangerous fall path to the hoistway is blocked, and This would be much easier and more reliable if the floor door and the floor door could be opened independently.

According to the present invention, a stop member is provided on the underside of the car, out of reach of the passenger, and in a location unrelated to the car door, which engages with the floor door and prevents it from opening. Passengers can fully open the car door. The stop on the underside of the car and the floor door are engaged when the bottom of the car is within the non-secure zone starting from the predetermined safe zone above the floor. At this time, if the floor door is slightly open, the stop member can be reached from the floor. When the underside of the car enters the safety zone, the stop member disengages from the floor door, ie, opens the floor door, and the floor door can then be completely opened.

In an embodiment of the invention, this stop member consists of a rod pivotally mounted behind the toe guard. A tow guard is located under the car entrance sill on most elevator systems to block the space created between the bottom of the car and the hoistway when the car is above the floor level. It's getting old. In this embodiment, an access hole is provided in the toe guard for accessing the rod and pivoting or moving the rod out of engagement with the door. This access hole can be hooked to allow access only to authorized personnel. The bar can be left engaged with the floor door when the door is opened a certain minimum "rescue" opening distance, and the bar must be pivoted from this engaged position to release the door. There must be.

One of the features of the present invention is that it is suitable for retrofitting into existing elevator systems, such as those having toe guards that serve as an additional barrier to prevent passengers in the car from accessing the equipment. ideal,
It is an object of the present invention to provide an interlock device that can have only one moving part, that is, a "rod."

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The illustrated car 10 is located in an unsafe zone between floors in the hoistway 12. Two doors 14 are arranged on the illustrated floor. These doors are of the "center-opening" type, meaning that when one opens, the other opens synchronously. These center-opening types are merely examples for explaining the operation of the present invention, and any structure in which a single door section or multiple door sections extend, contract, or slide to open the door may also be used. There is no problem.

Edge of one door 14 (opening edge and opposite edge)
An L-shaped bracket or bar 16 is disposed along the line. This bar 16 has a length of 17 and is mounted at a distance of 18 from the top of the floor.
The distance (length) 17 defines an unsafe zone (within which passengers cannot open the floor door 14 beyond a predetermined maximum rescue distance of 20). This unsafe zone begins at distance 18 and ends at distance 22 from the top of the door opening. If the car is within a distance of 22, the space created at that time is too small for the passenger to escape from the car, so there is no danger of falling into the hoistway, and similarly, even if the car is above the floor, the passenger must be within a distance of 18. If so, the space created is small and there is no danger of passengers falling into the hoistway. The safety distance 18 and the distance 22 from the top of the door opening are determined by the height between floors, the height of the car,
Although it varies depending on the height of the floor door, the width of the toe guard (described below), and other characteristics, the safety distance 18 is typically 20 cm, but can be as high as 50 cm. The distance 22 is such a distance that even if a passenger trying to get out of the car lies down, he or she will not be able to get out of the gap created between the top of the door opening and the floor of the car.

A toe guard 24 made of a plate extending the entire width of the floor door is disposed below the bottom of the car 10. A rod 26 is rotatably attached to the toe guard 24. This rod 26 is the door 1
It includes an arm-like extension 28 extending towards 4. Also, the opposite end of the rod 28 is at right angles (90°) to the arm 28.
has another arm, and a plate 32 is placed in the center of the rod 26. The plate 32 and the arm 30 form the toe guard 2.
4, the rod 26 is in the "rest position". In this position, arm 28 extends toward door 14 as shown. The toe guard 24 has a plate 32 inserted through the gap when the door is slightly opened.
A hole 25 is provided to allow access to. When a tool such as a screwdriver is inserted into the hole 25 and the plate 32 is pushed, the rod 2 is moved to a position (indicated by a broken line in the figure) such that the arm 28 no longer faces the door 14.
6 can be rotated.

The arm 28 engages the bracket 16 to close the floor door 14 (which are connected to each other as previously described).
I try not to open it to a distance of 20 or more. However, when the rod 26 is rotated, the arm 28 moves to the bracket 1.
6, the door 14 is released from the car and can be opened completely manually.

The hole 25 in the toe guard 24 is illustrated as circular to allow the use of a basic screwdriver-like tool to rotate the bar 26, which is often used in floor door interlocks. The bar 26 may also be key-shaped, such as a "half-moon key" such that the rod 26 can only be rotated by a similar key-shaped device. Since the car door (not shown) does not engage the floor door, a passenger in the car, for example, can open the car door in any way. And the door 14 on the floor has a rescue distance of 2.
If it were opened to 0, the passenger would be tempted to reach down and try to rotate the rod 26. If there is such a risk, it is particularly advantageous to use hook-shaped holes. However, board 32
Then, with the arm 30 at an appropriate weight, a passenger who is not holding a driver etc. applies force to the board 32 (arm 2
8 from the L bracket 16) may be extremely difficult.

The size of gap distance 20 is determined by the distance the door travels before arm 28 and bracket 16 engage. In most elevator systems, the car width is wider than the door opening, and the toe guard is usually about the same width. Therefore, if the bracket 16 is mounted on the locking side of a floor door as shown, the distance 20 can be simply determined by the extension of the rod 26 beyond the toe guard. Bracket 1 to increase distance 20
6 may be moved toward the opening edge of the door, but it is preferable that the bracket be located along the edge on the locking side of the door so as not to interfere with equipment outside the car door.

Similarly, in single-sided installations, the bracket 16 is placed on the side opposite from the locking side, ie, the side from which the door opens. In single door installations, the access hole and plate 32 in the toe guard are not located in the center of the basket, but are located near the edge of the door on which the door opens.
In this case, the positions of the plate 32 and the arm 30 may be exchanged. Arm 30 is not necessary if plate 32 is of such size and weight as to place rod 26 in its normal position for engagement with bracket 16, as described above.

Other modifications and changes may be devised by those skilled in the art without departing from the scope of the invention.

[Brief explanation of drawings]

The attached drawing is a view looking up from the bottom of the vertical hole to the bottom of the car and the back side of the floor door, and shows that the car is in a non-safe zone between two floors, and the center-opening door of the floor is within the rescue distance. It shows that only the opening is open. 10... Car, 12... Hoistway, 14... Floor door, 16... L-shaped bracket (bar), 17
... Length of bracket, 18 ... Lower limit of non-safety zone, 20 ... Maximum rescue distance, 22 ... Upper limit of non-safety zone, 24 ... Toe guard, 25 ... Tool insertion hole, 26 ... Rod , 28, 30...stick arm,
32...Bias plate.

Claims (1)

Claims: 1. In a releasable floor door safety interlock for use in a floor door construction including at least one door movable between an open position and a closed position, consistent with a non-safety zone. a bracket 16 having a length of 17; a toe guard 24 fixed to the front edge of the floor of the elevator car and having a central hole 25; and an arm-shaped extension 28 at at least one end.
and a plate 32 provided with a direction changed by 90 degrees.
6, along the edge opposite to the opening edge of the floor door, above the safety distance 18 from the floor and separated from said opposite edge by a distance corresponding to a predetermined maximum rescue distance 20. The above bracket 16 is attached to the floor door.
is fixed, said rod 26 is pivotally mounted on the toe guard 24, the plate 32 of the rod is above the hole 25 of the toe guard 24,
The arm-like extension 28 extends perpendicularly to the bar, so that the arm-like extension 28 hooks onto the bracket 16 while the car is in the non-secure zone, and the stair door can be used for maximum rescue. A releasable floor door safety interlock that can only be opened a distance of 20 minutes.