JP2019018975A - Unlocking device for elevator landing door - Google Patents

Abstract

To smoothly perform an unlocking operation without an unlocking key interfering with the engagement plate of a car when a landing door of an elevator is unlocked from a landing side due to, for example, maintenance and inspection.SOLUTION: An unlocking key 50 comprises an actuation part 51 inserted into a key hole 34. This actuation part 51 has: a fixed part 52; a first movable part 54 attached to the leading end of the fixed part 52 so as to be bendable in a specific direction by a shaft 53; and a second movable part 56 attached to the leading end of the first movable part 54 so as to be bendable in a specific direction by a shaft 55. In addition, the specific directions in which the respective movable parts are bendable by the shafts 53, 55 are identical. By dividing the movable part of the unlocking key 50 into the first movable part 53 and the second movable part 55 in such a manner, the length of one movable part is shortened. This prevents the leading end of the unlocking lever 50 from interfering with the fixed engagement plate 40 of a car when the unlocking key 50 is inserted into the key hole 34.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an unlocking device used when a maintenance worker manually unlocks a landing door from an elevator hall during maintenance inspection or the like.

  Generally, an elevator is provided with a device for unlocking a landing door from the landing side at the time of maintenance inspection or emergency rescue of passengers in the car. Among these types of devices, there are many configurations that unlock the landing door by providing a key hole in the landing door and inserting and unlocking the unlocking key into the key hole. The keyhole of this hall door is provided above the hall door from the viewpoint of design and prevention of tampering.

  An example of the structure of this conventional landing door will be described with reference to FIGS. FIG. 3 is a front view of the center double landing door device viewed from the hoistway side, FIGS. 4 and 5 are operation explanatory views of the landing door unlocking device, and FIG. .

In the figure, 1 is a hanger case fixed to the wall 2 of the hall, and 3 is a rail fixed to the hanger case 1. 4 is a pair of landing doors, 5 is a door hanger fixed to the landing door 4, and 6 is a hanger roller that is pivotally attached to the door hanger 5 and rolls on the rail 3.
Reference numeral 10 denotes a support fixed to the lower part of the door hanger 5 by a bolt 11, and 12 denotes an L-shaped operating body having a vertical piece 13 extending in the vertical direction and a horizontal piece 14 extending in the horizontal direction. A shaft 15 is pivotally attached to the support 10.

Reference numeral 20 denotes a switch box fixed to the rail 3 by a bolt 21. The switch box 20 has a fixed piece 22 in the lower part, and has a switch 23 and a contact 24 of the switch 23 inside.
At the tip of the horizontal piece 14, a hook 16 is provided that engages with the fixed piece 22 to lock the landing door 4 when the landing door 4 is closed, and further, a contact 17 for short-circuiting the contact 24 is provided at the tip. It has been.

Reference numeral 30 denotes an unlocking roller pivotally attached to the vertical piece 13, and 31 denotes an operation roller provided on the shaft 15. Reference numeral 32 denotes a compression spring provided between the bent portion 12a provided on the operating body 12 and the bent portion 10a provided on the support body 10, and biases the operating body 12 counterclockwise in FIG. Yes.
Reference numeral 33 denotes an unlocking lever provided on the horizontal piece 14, and a lower end portion thereof is bent into an L-shaped cross section to form a horizontal portion 33 a, which extends to the vicinity of the keyhole 34 formed in the landing door 4. When the unlocking key 35 is inserted into the keyhole 34 and the unlocking key 35 is turned at the time of maintenance inspection or the like, the unlocking key 35 comes into contact with the lateral portion 33a of the unlocking lever 33 as shown in FIG. The lock lever 33 can be operated.

  Reference numeral 40 denotes a fixed engagement plate disposed on a door of an elevator car (not shown). Reference numeral 41 also denotes a movable engagement plate.

Next, the operation of this apparatus will be described. 3 and 4 show a state where the landing door 4 is closed and locked.
In the case of normal operation, when the elevator car reaches the landing and the car door faces the landing door 4, the fixed engagement plate 40 and the movable engagement plate 41 of the car door are shown by two-dot chain lines as shown in FIG. Come to the position shown.

  When the car door starts to open, the fixed engagement plate 40 moves to the right (door opening direction) in FIG. 4 and contacts the unlocking roller 30. Further, when the fixed engagement plate 40 moves to the right, the unlocking roller 30 also moves to the right, and the operating body 12 rotates clockwise about the shaft 15 to the position shown in FIG. As a result, the hook 16 and the fixed piece 22 are disengaged from each other, the contact 17 is separated from the contact 24, the switch 23 is turned off, and the elevator operation is prevented.

  Further, the movable engagement plate 41 is moved relatively to the left by a car door link mechanism, a cam mechanism, or the like, not shown, and contacts the operating roller 31. Thus, the unlocking roller 30 and the operating roller 31 are sandwiched between the fixed engagement plate 40 and the movable engagement plate 41, and the car door and the landing door 4 are opened simultaneously. When closed, the operation is reversed.

Next, the case where the unlocking key 35 is used to open the landing door 4 from the landing will be described with reference to FIG.
From the landing side (the other side in FIG. 5), the unlocking key 35 is inserted into the keyhole 34, and the unlocking key 35 is rotated counterclockwise in FIG.
As a result, the horizontal portion 33 a of the unlocking lever 33 is pushed by the unlocking key 35, the lower part of the unlocking lever 33 moves to the left, and the operating body 12 rotates clockwise about the shaft 15.

  As a result, the hook 16 and the fixed piece 22 are disengaged as described above, the contact 17 is separated from the contact 24, the switch 23 is turned off, and the elevator ascending / descending operation is prevented. When there is a car at the landing, the operation roller 31 pushes the movable engagement plate 41, and the car door and the landing door 4 are opened simultaneously.

As shown in FIG. 7, which is a view corresponding to a cross-sectional view of the main part of FIG. The operating part 36 has a fixed part 37 and a movable part 39 attached to the tip of the fixed part 37 so as to be bent in a specific direction by a pin 38 (see, for example, Patent Document 1).
Further, a guide 34 a having a hole for inserting the operating portion 36 of the unlocking key 35 is disposed as the key hole 34.

  When the operation part 36 of the unlocking key 35 is inserted into the guide 34a of the key hole 34 so that the pin 38 is in the horizontal direction, the movable part 39 hangs down due to gravity. In this state, the landing door 4 can be unlocked by rotating the unlocking key 35 counterclockwise in FIG.

JP 2016-37326 A

In the apparatus, the distance between the lateral portion 33a of the unlocking lever 33 and the key hole 34 is relatively small, but the distance between the key hole 34 and the fixed engagement plate 40 of the car may vary greatly depending on the site.
Therefore, when the distance between the key hole 34 and the fixed engagement plate 40 of the car is short, the unlock key 35 is inserted into the key hole 34 when the car door faces the landing door 4 as shown in FIG. Then, before the pin 38 of the unlocking key 35 completely passes through the guide 34a, the movable portion 39 may hit (interfer with) the fixed engagement plate 40 of the car.
If the movable portion 39 interferes with the fixed engagement plate 40 of the car before the pin 38 completely passes through the guide 34a, the movable portion 39 cannot hang down, so that the unlocking operation cannot be performed. is there.

As a method for solving the above-described problem, it is conceivable to shorten the distance between the lateral portion 33a of the unlocking lever 33 and the keyhole 34 of the device. Thereby, since the movable part 39 of the unlocking key 35 can be shortened, the movable part 39 can hang down without the movable part 39 interfering with the fixed engagement plate 40 of the car.
However, if the distance between the lateral portion 33a of the unlocking lever 33 and the key hole 34 is shortened, the force of the unlocking key 35 pushing up the unlocking lever 33 is applied when the unlocking key 35 is rotated, and smooth operation is achieved. There is a risk that it will not be possible. Therefore, there is a problem in shortening the distance between the lateral portion 33a of the unlocking lever 33 and the keyhole 34 of the device.

Therefore, as another method, the movable portion 39 interferes with the fixed engagement plate 40 of the car even when the distance between the keyhole 34 and the fixed engagement plate 40 of the cage is the shortest. It is considered to have a length that can be drooped. In this way, the movable part 39 can hang down without interfering with the fixed engagement plate 40 of the car at any site.
However, with this method, since the length of the movable portion 39 is shortened, depending on the site, the movable portion 39 cannot be sufficiently engaged with the lateral portion 33a of the unlocking lever 33 during the unlocking operation. However, there is a possibility that the unlocking lever 33 cannot be rotated sufficiently.

Therefore, as another method, it is considered to change the length of the movable portion 39 according to the distance between the keyhole 34 and the fixed engagement plate 40 of the car. That is, the length of the movable portion 39 is made as long as possible within a range where the movable portion 39 does not interfere with the fixed engagement plate 40 of the car. This increases the possibility that the movable portion 39 can reliably rotate the unlocking lever 33.
However, this method has a problem that a plurality of types of unlocking keys 35 having different lengths of the movable portion 39 are required depending on the distance between the keyhole 34 and the fixed engagement plate 40 of the car.
An object of the present invention is to solve these problems and to provide an unlocking key that can reliably perform an unlocking operation.

  The present invention relates to an unlocking device having an unlocking key that is inserted into a keyhole provided in an elevator hall door and unlocks the hallway door. The operating part has a configuration that can be bent at a plurality of locations.

  Further, the present invention is characterized in that the movable part can be bent in a specific direction by its own weight.

  Furthermore, the present invention is characterized in that shafts are provided at a plurality of positions of the operating portion, and the directions of the central axes of the respective shafts are the same.

  According to the present invention, when the elevator landing door is unlocked from the landing side for maintenance inspection or the like, the unlocking operation by the unlocking key can be reliably performed.

It is the top view and front view which show the unlocking key by embodiment of this invention. It is principal part sectional drawing of the landing door unlocking apparatus which shows the use condition of the unlocking key by embodiment of this invention. It is the front view which looked at the conventional center double opening hall door device from the hoistway side. It is operation | movement explanatory drawing of the conventional landing door unlocking apparatus. It is operation | movement explanatory drawing of the conventional landing door unlocking apparatus. It is a figure equivalent to the top view of FIG. It is a figure equivalent to the principal part sectional drawing of FIG.

An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view and a front view showing an unlocking key according to the present embodiment, and FIG. 2 is a cross-sectional view of a main part of a landing door unlocking device showing a use state of the unlocking key.
In the figure, reference numeral 50 denotes an unlocking key according to the present embodiment, which includes an operating portion 51 inserted into the keyhole 34. The operating portion 51 includes a fixed portion 52, a first movable portion 54 attached to a distal end of the fixed portion 52 so as to be bent in a specific direction by a shaft 53, and a shaft 55 at the distal end of the first movable portion 54. The second movable portion 56 is attached so as to be bent in a specific direction. Moreover, the specific direction which can be bent by the shafts 53 and 55 is the same direction.

When the unlock key 50 is used, the second movable portion 56 is inserted into the key hole 34 as shown in FIG. And if the axis | shaft 55 passes the guide 34a of the keyhole 34, the 2nd movable part 56 will hang down with dead weight. Subsequently, the first movable portion 54 is inserted into the keyhole 34. When the shaft 53 passes through the guide 34a of the keyhole 34, the first movable portion 54 also hangs down due to its own weight, and is in a hanging state indicated by a two-dot chain line.
In this state, when the unlocking key 50 is rotated counterclockwise in FIG. 5, the first movable portion 54 or the second movable portion 56 is moved to the lateral portion 33 a of the unlocking lever 33 in the same manner as already described with reference to FIG. Can be reliably unlocked.

  In this embodiment, since the movable part of the unlocking key 50 has two stages, the movable parts 54 and 56 are shorter than the conventional movable part 39. Therefore, it is possible to prevent the second movable portion 56 at the tip of the unlocking key 50 from interfering with the fixed engagement plate 40 during the releasing operation.

In this embodiment, the fixed portion 52, the first movable portion 54, and the second movable portion 56 are connected by shafts 53 and 55, respectively. The shaft is movable with each fixed portion, such as a pin. What is necessary is just what can connect a part so that rotation is possible. Moreover, although the movable part has two stages, it is also possible to have three or more stages.
Further, it goes without saying that the present invention can be applied to any type of doors such as a central double door, a single door, or a door.

4 landing door 34 key hole 40 fixed engagement plate 50 unlocking key 51 actuating part 52 fixed part 53,55 shaft 54,56 movable part

Claims (3)

In an unlocking device having an unlocking key that is inserted into a key hole provided in an elevator hall door and unlocks the hall door,
The unlocking key includes an operating portion having a fixed portion and a movable portion that can be inserted into the keyhole, and the operating portion is configured to be bent at a plurality of locations. Locking device.   The elevator landing door unlocking device according to claim 1, wherein the movable portion can be bent in a specific direction by its own weight.   The elevator hall door unlocking device according to claim 1 or 2, wherein shafts are provided at a plurality of positions of the operating portion, and directions of central axes of the respective shafts are the same.