JP6787265B2 - Elevator landing door unlocking device - Google Patents

Description

The present invention relates to an unlocking device used by a maintenance person to manually unlock a landing door from an elevator landing during maintenance and inspection.

Generally, the elevator is provided with a device for unlocking the landing door from the landing side at the time of maintenance and inspection or emergency rescue of passengers in the car. In many of these types of devices, a keyhole is provided in the landing door, and an unlocking key is inserted into the keyhole and rotated to unlock the landing door. The keyhole of the landing door is provided above the landing door from the viewpoint of design and tampering prevention.

An example of the structure of this conventional landing door will be described with reference to FIGS. 3 to 6. FIG. 3 is a front view of the central double-door landing door device as viewed from the hoistway side, FIGS. 4 and 5 are operation explanatory views of the landing door unlocking device, and FIG. 6 is a view corresponding to a plan view of FIG. ..

In the figure, 1 is a hanger case fixed to the wall 2 of the landing, and 3 is a rail fixed to the hanger case 1. Reference numeral 4 denotes 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 bolts 11, and reference numeral 12 denotes an L-shaped operating body having a vertically extending vertical piece 13 and a horizontally extending horizontal piece 14, with an intermediate portion thereof. It is pivotally attached to the support 10 by a shaft 15.

Reference numeral 20 denotes a switch box fixed to the rail 3 by bolts 21, which has a fixing piece 22 at the bottom and a switch 23 and a contact 24 of the switch 23 inside.
At the tip of the horizontal piece 14, a hook 16 that engages with the fixed piece 22 to lock the landing door 4 when the landing door 4 is closed is provided, and a contact 17 for short-circuiting the contact 24 is provided at the tip thereof. Has been done.

Reference numeral 30 denotes an unlocking roller pivotally attached to the vertical piece 13, and reference numeral 31 denotes an operating 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 10, and urges the operating body 12 in the counterclockwise direction of FIG. There is.
Reference numeral 33 denotes an unlocking lever provided on the horizontal piece 14, and the lower end portion is bent into an L-shaped cross section to form a horizontal portion 33a, which extends close to the keyhole 34 made in the landing door 4. When the unlock key 35 is inserted into the keyhole 34 and the unlock key 35 is turned during maintenance and inspection, the unlock key 35 comes into contact with the lateral portion 33a of the unlock lever 33 and is unlocked as shown in FIG. The lock lever 33 can be operated.

Reference numeral 40 denotes a fixed engaging plate arranged on the door of the elevator car (not shown), and 41 is a movable engaging plate, which moves left and right by movement by a link mechanism, a cam mechanism, or the like, or movement accompanying opening and closing of the car door.

Next, the operation of this device will be described. 3 and 4 show a state in which the landing door 4 is closed and locked.
In the normal operation, when the elevator car lands on the landing and the car door faces the landing door 4, as shown in FIG. 4, the fixed engaging plate 40 and the movable engaging plate 41 of the car door are connected by a chain double-dashed line. Come to the indicated position.

When the car door starts to open, the fixed engaging plate 40 moves to the right side (door opening direction) in FIG. 4 and comes into contact with the unlocking roller 30. Further, when the fixed engaging plate 40 moves to the right, the unlocking roller 30 also moves to the right, and the operating body 12 rotates clockwise around the shaft 15 to reach the position shown in FIG. As a result, the hook 16 and the fixing piece 22 are disengaged, the contact 17 is separated from the contact 24, the switch 23 is turned off, and the elevator is prevented from moving up and down.

Further, the movable engaging plate 41 moves relatively to the left by a car door link mechanism, a cam mechanism, or the like (not shown), and comes into contact with the operating roller 31. As a result, the unlocking roller 30 and the operating roller 31 are sandwiched between the fixed engaging plate 40 and the movable engaging plate 41, and the car door and the landing door 4 are opened at the same time. The opposite is true when closing.

Next, a case where the landing door 4 is opened from the landing by using the unlock key 35 will be described with reference to FIG.
From the landing side (the other side of FIG. 5), the unlock key 35 is inserted into the keyhole 34, and the unlock key 35 is rotated counterclockwise in FIG.
As a result, the lateral portion 33a 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 around the shaft 15.

As a result, as described above, the hook 16 and the fixing piece 22 are disengaged, the contact 17 is separated from the contact 24, the switch 23 is turned off, and the elevator is prevented from moving up and down. When there is a car in the landing, the operating roller 31 pushes the movable engaging plate 41, and the car door and the landing door 4 are opened at the same time.

The unlocking key 35 includes an operating portion 36 that is inserted into the keyhole 34, as shown in FIG. 7, which is a view corresponding to a cross-sectional view of a main part of FIG. The operating portion 36 has a fixed portion 37 and a movable portion 39 attached to the tip of the fixed portion 37 so as to be bendable in a specific direction by a pin 38 (see, for example, Patent Document 1).
Further, as the keyhole 34, a guide 34a provided with a hole for inserting the operating portion 36 of the unlocking key 35 is arranged.

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

Japanese Unexamined Patent Publication No. 2016-37326

In the above device, the distance between the lateral portion 33a of the unlocking lever 33 and the keyhole 34 is relatively small, but the distance between the keyhole 34 and the fixed engaging plate 40 of the car may vary greatly depending on the site.
Therefore, in the case where the distance between the keyhole 34 and the fixed engaging plate 40 of the car is short, the unlocking key 35 is inserted into the keyhole 34 when the car door faces the landing door 4, as shown in FIG. Then, the movable portion 39 may hit (interfere with) the fixed engaging plate 40 of the car before the pin 38 of the unlocking key 35 completely passes through the guide 34a.
If the movable portion 39 interferes with the fixed engaging 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-mentioned problem, it is conceivable to shorten the distance between the lateral portion 33a of the unlocking lever 33 of the device and the keyhole 34. As a result, the movable portion 39 of the unlocking key 35 can be shortened, so that the movable portion 39 can hang down without interfering with the fixed engaging plate 40 of the car.
However, if the distance between the lateral portion 33a of the unlocking lever 33 and the keyhole 34 is shortened, the unlocking key 35 exerts a force to push up the unlocking lever 33 when the unlocking key 35 is rotated, resulting in smooth operation. 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 of the device and the keyhole 34.

Therefore, as another method, the length of the movable portion 39 may interfere with the fixed engaging plate 40 of the car even at the site where the distance between the keyhole 34 and the fixed engaging plate 40 of the car is the shortest. It is considered to make it long enough to hang down. In this way, the movable portion 39 can hang down without interfering with the fixed engaging plate 40 of the car at any site.
However, with this method, the length of the movable portion 39 is shortened, so that the movable portion 39 cannot be sufficiently hooked on the lateral portion 33a of the unlocking lever 33 during the unlocking operation depending on the site, and the movable portion 39 cannot be sufficiently engaged. May not rotate the unlocking lever 33 sufficiently.

Therefore, as yet 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 engaging plate 40 of the car. That is, the length of the movable portion 39 is made as long as possible within a range in which the movable portion 39 does not interfere with the fixed engaging plate 40 of the car. In this way, there is a high 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 engaging plate 40 of the car.
An object of the present invention is to provide an unlocking key capable of solving these problems and reliably performing an unlocking operation.

The present invention is an unlocking device having an unlocking key that is inserted into a keyhole provided in an elevator landing door to unlock the landing door. The unlocking key is a fixed portion and a movable portion that can be inserted into the keyhole. It is characterized in that the operating portion is provided with a structure that can be bent at a plurality of locations.

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

Further, the present invention is characterized in that shafts are provided at a plurality of locations of the operating portion, and the direction of the central axis of each shaft is the same.

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

It is a top view and the front view which shows the unlocking key by embodiment of this invention. It is sectional drawing of the main part of the landing door unlocking apparatus which shows the use state of the unlocking key by embodiment of this invention. It is a front view of the conventional landing door device of a central double door viewed from the hoistway side. It is operation explanatory drawing of the conventional landing door unlocking apparatus. It is operation explanatory drawing of the conventional landing door unlocking apparatus. It is a figure corresponding to the plan view of FIG. It is a figure corresponding to the cross-sectional view of the main part of FIG.

Embodiments of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a plan view and a front view showing the unlocking key of the present embodiment, and FIG. 2 is a cross-sectional view of a main part of a landing door unlocking device showing a usage state of the unlocking key.
In the figure, reference numeral 50 denotes an unlocking key of the present embodiment, which includes an operating portion 51 inserted into the keyhole 34. The operating portion 51 has a fixing portion 52 and a first movable portion 54 attached to the tip of the fixing portion 52 so as to be bendable in a specific direction by a shaft 53, and further, a shaft 55 is attached to the tip of the first movable portion 54. It has a second movable portion 56 that is flexibly attached in a specific direction. Further, the specific bendable directions by the shafts 53 and 55 are the same direction.

When the unlocking key 50 is used, the second movable portion 56 is inserted into the keyhole 34 as shown in FIG. Then, when the shaft 55 passes through the guide 34a of the keyhole 34, the second movable portion 56 hangs down due to its own weight. Subsequently, the first movable portion 54 is inserted into the keyhole 34. Then, 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 becomes a hanging state indicated by the alternate long and short dash line.
In this state, when the unlock 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 33a of the unlock lever 33 in the same manner as described in FIG. It is possible to reliably perform the unlocking operation by contacting with.

In the present embodiment, since the movable portion of the unlocking key 50 has two stages, the movable portions 54 and 56 are shorter than the conventional movable portion 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 engaging plate 40 during the unlocking 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, but the shaft is movable with each fixed portion like a pin, for example. Any unit may be used as long as the portions can be rotatably connected. Further, 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 door, whether it is a central double door, a single door, or a door.

4 Landing door 34 Keyhole 40 Fixed engagement plate 50 Unlocking key 51 Acting part 52 Fixed part 53,55 Shaft 54,56 Moving part

Claims (3)

In an unlocking device having an unlocking key that is inserted into a keyhole provided in an elevator landing door to unlock the landing door.
The unlocking key includes an operating portion having a fixed portion and a movable portion that can be inserted into the keyhole.
An elevator landing door unlocking device characterized in that the operating portion inserted into the keyhole is configured to be bendable at a plurality of locations. 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 unlocking device for an elevator landing door according to claim 1 or 2, wherein shafts are provided at a plurality of locations of the operating portion, and the directions of the central axes of the shafts are the same.