JPH05278978A - Maintenance-use unlocking tool for elevator landing door - Google Patents

Abstract

PURPOSE:To keep a landing door of an elevator hall reliably in a locked condition when an operator is not operating it in an elevator maintenance/inspection work. CONSTITUTION:When a maintenance/inspection on an elevator is carried out, an operating body 16 composed of a bar is inserted/supported loosely on the reverse of a landing door 3 through attracting tools 15 and 15 so as to be movable vertically freely, and this operating body 16 is engaged with an engaging piece 7, and is situated under a freely rotatable latch 10 to regulate the release of the landing door 3. When it is not operated, the operating body 16 is held stably in a position of not rotating the latch 10 due to gravitation and the attracting tools 15 and 15, and when an operator is carrying out a push-up operation, it ascends while being guided by/supported with the attracting tools 15 and 15, and rotates/releases the horizontal condition latch 10 engaged with the upper engaging piece 7. Thereby, when the operating body 16 is not operated, the landing door 3 can be kept reliably in a locked condition, so that the occurrence of an accident can be prevented reliably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door unlocking tool for elevators which is temporarily installed on the back surface of the door during maintenance and unlocks the door.

[0002]

2. Description of the Related Art FIG. 2 shows, for example, Japanese Utility Model Laid-Open No. 54-166662.
1 shows a conventional unlocking device for an elevator hall door as disclosed in Japanese Patent Publication No. JP-A-2003-138, in which an elevator hall 1 is a hall door 3
The hanger case 4 is attached to the wall surface on the hoistway side, and the rail 5 and the mounting metal 6 which are horizontally positioned are attached to the elevation of the hanger case 4. A horizontal L-shaped engagement element 7 is attached to the attachment metal 6.

A door hanger 8 having an L-shaped cross section is erected on the upper part of the landing door 3, and a rotatable roller 9 engaging with a rail 5 is pivotally mounted on the upper part of the vertical surface of the door hanger 8. At the same time, a lateral L-shaped latch 10 for hooking the hook 10a on the engaging element 7 is pivotally mounted. The latch 10 is pivotally mounted on the end of the latch 10 opposite to the hook 10a and the rear surface of the landing door 3. A rotatable rod 12 is vertically mounted between the engaged mechanisms 11.

Therefore, when the landing door 3 is closed, the latch 1
The hook portion 10 a of 0 engages with the engaging element 7 to regulate the opening of the landing door 3 that closes the doorway 2. Further, when an elevator car (not shown) is landed on the hall 1 and the car door is opened, the engagement mechanism 11 moves as the engagement piece 13 of the car door moves.
Rotates to pull the rod 12 downward, the horizontal latch 10 engaged with the engaging element 7 rotates upward to unlock, and the landing door 3 moves to open the doorway 2.

When the entrance / exit 2 is opened for maintenance and inspection, the drawstring 14 may be connected to the lower end of the rod 12 and then the suspended drawstring 14 may be appropriately pulled. For example,
When an operator engaged in the work in the pit of the hoistway pulls the lower part of the drawstring 14 previously connected to the rod 12, the rod 12 moves downward and is engaged with the engaging element 7 in the horizontal state. Can be rotated upward to open the landing door 3 that has closed the doorway 2.

[0006]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The conventional unlocking of the landing door 3 at the time of maintenance and inspection is performed as described above.
Is in a suspended state in which it can be swung at all times, so the drawstring 14 is caught by an operator, the equipment of the elevator car, etc.
There was a risk that the car would be unnecessarily unlocked and an accident would occur.

The present invention has been made in view of the above, and an object thereof is to provide an unlocking tool for maintenance of a landing door of an elevator, in which a latch can be securely engaged with an engaging member when not operated. ..

[0008]

In order to achieve the above object in the present invention, a landing door that opens and closes a doorway of an elevator hall, and an engaging member that is attached to a wall surface of a hoistway and is located above the doorway. And a latch that is pivotally attached to the upper part of the landing door so as to be rotatable and that restricts the opening of the landing door that engages with the engaging element and closes the entrance and exit. It is characterized in that an up-and-down movable actuator for unlocking the engagement of the latch with the engaging element is temporarily installed during maintenance and inspection.

[0009]

According to the present invention, the operating body is supported by the suction tool so as to be vertically movable when not in operation, and is pushed up by the operator during operation so that the operating body rises and engages with the engaging element. Rotate the latch upwards.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to an embodiment shown in FIG. 1. In the drawing, 15 is a pair of suction tools which are sucked onto the back surface (elevator car side) of a landing door 3 at the time of maintenance and inspection. The suction tool 15 is a holder 1 that is curved in a substantially hat shape in a plane.
5a and the landing door 3 attached to the elevation of the holder 15a.
It is composed of a pair of permanent magnets 15b that are attracted to the back surface of the landing door 3, is attracted to the upper and lower portions of the back surface of the landing door 3 separately, and is positioned below the latch 10.

Reference numeral 16 designates an actuating member which is vertically inserted into and supported by the pair of suction members 15 and 15 and which is vertically movable.
6 is a bar having a length substantially the same as the height of the landing door 3, and at the lower part of this bar, the suction tool 1 that is adsorbed to the lower part of the back surface of the landing door 3.
A stopper 16a that locks to 5 is provided in a protruding manner.

Other parts are the same as in the conventional example.

Therefore, before the maintenance and inspection work, the worker vertically addresses the actuating body 16 to the back surface of the landing door 3 and latches 10.
1, the suction tool 15 directed to the upper and lower parts of the actuating body 16 is sucked onto the back surface of the landing door 3 as shown in FIG.
Maintenance and inspection work should be performed. At this time, the actuating body 16 is always held in the lowered position by gravity when it is not operated, but the stopper 16a comes into contact with the suction tool 15 so that it does not fall off from the suction tools 15, 15. And doorway 2
When the operator who wants to release the lever pushes up the actuating body 16, the actuating body 16 is lifted while being guided and supported by the suction tools 15 and 15 so that the upper horizontal latch 10 abuts and rotates upward, and the latch 10 The engagement with the engaging element 7 is unlocked, and the landing door 3 can be opened.

As described above, according to the present invention, the actuator 16
When the operator is not operating, the latch 10 is stably held by the gravity and the suction tool 15 in a position where the latch 10 does not rotate, and when operating, the latch 10 that is raised and engaged with the engaging element 7 is rotated and unlocked. , The latch 10 is not disengaged from the engaging element 7 due to the engagement between the actuating body 16 and the operator or the equipment of the elevator car when not in operation, and therefore, the unnecessary unlocking of the landing door 3 can be reliably prevented. You can

[0015]

As described above, according to the present invention, the operating body is stably held at the position where the latch is not rotated by the gravity and the suction tool when the operator is not operating, and is raised during the operation to engage the engaging element. Since the latch that fits is rotated and unlocked, the latch does not disengage from the engaging element when the operator and the implement of the elevator car are engaged when not operating. There is an effect that it is possible to reliably prevent the unlocking.

[Brief description of drawings]

FIG. 1 is an explanatory view of an unlocking tool for maintenance of an elevator hall door according to the present invention as viewed from the hoistway side.

FIG. 2 is an explanatory view of a conventional unlocking tool for maintenance of an elevator hall door as seen from the hoistway side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elevator hall 2 Doorway 3 Hall door 7 Engager 10 Latch 12 Rod 15 Adsorption tool 16 Actuator

Claims (1)

[Claims] 1. A landing door that opens and closes a doorway of an elevator hall, an engaging member that is attached to a wall surface of a hoistway and is located above the doorway, and is rotatably pivotally attached to an upper portion of the landing door.
And a latch for restricting the opening of the landing door that engages with the engaging element and closes the doorway, and the back surface of the landing door is vertically movable to unlock the engagement of the latch with the engaging element based on a manual operation. An unlocking tool for maintenance of an elevator landing door, which is characterized in that the operating body is temporarily installed during maintenance and inspection.