JP2019018951A - Unlocking device for elevator landing door - Google Patents

Abstract

To realize, with a relatively simple configuration, a device for preventing a worker from falling in a hoistway when a landing door of an elevator is unlocked from a landing side due to, for example, a maintenance and inspection.SOLUTION: On a landing side, a fixed piece 22 and an auxiliary fixed piece 60 are provided. On a landing-door 4 side, an auxiliary hook 52 that is engaged with the auxiliary fixed piece 60 and an actuation body 50 with an auxiliary unlocking lever 56 are provided. A lock body 54 is pivotally attached to this actuation body 50. This lock body 54 has: a hook 16 that is engaged with the fixed piece 22; and an unlocking lever 33. To open a landing door 4 from a landing side for the purpose of, for example, maintenance and inspection, an unlocking key 35 inserted from a key hole 34 of the landing door 4 is rotated and the hook 16 and the fixed piece 22 are disengaged via the unlocking lever 33. Next, the landing door 4 is opened by a predetermined distance, the auxiliary unlocking lever 56 is operated, the auxiliary hook 52 and the auxiliary fixed piece 60 are thereby disengaged, and the landing door 4 is fully opened.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a device that temporarily prevents a landing door from being opened more than a predetermined distance when the landing door is unlocked from the landing side for maintenance inspection or the like.

Conventionally, when opening an elevator landing door from the landing side for maintenance inspections or rescue of passengers in the car, when an administrator unfamiliar with the elevator opens the landing door and there is no car at the landing, the landing door Could fall into the hoistway when it opened.
An example of the structure of this conventional landing door will be described with reference to FIGS. FIG. 7 is a front view of the center double landing door device viewed from the hoistway side, and FIGS. 8, 9, and 10 are operation explanatory views of the landing door unlocking device.

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 6 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 urges the operating body 12 counterclockwise.
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 at the time of maintenance or the like and the unlocking key 35 is turned, the unlocking key 35 hits the lateral portion 33a of the unlocking lever 33 as shown in FIG. It 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. 7 and 8 show a state where the landing door 4 is closed and locked.
In a 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 come to positions indicated by two-dot chain lines.

  When the car door starts to open, the fixed engagement plate 40 moves to the right (door opening direction) in FIG. 8 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 simultaneously opened (FIG. 10). When closed, the operation is reversed.

Next, a case where the landing door 4 is opened from the landing using the unlock key 35 will be described with reference to FIG.
The unlocking key 35 is inserted into the keyhole 34 from the landing side (the other side in FIG. 9), and rotates 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 unlocking roller 30 and the operating roller 31 are sandwiched by the fixed engagement plate 40 and the movable engagement plate 41, and the car door and the landing door 4 are simultaneously opened (FIG. 10).

At this time, if a manager or the like unfamiliar with the elevator opens the landing door 4, if there is no car at the landing, it falls into the hoistway from the space 42 formed when the landing door 4 is opened. there is a possibility.
Therefore, in order to prevent such an accident, when opening the landing door 4 from the landing side, a device for temporarily stopping the landing door 4 in the middle of opening the door is considered.

For example, what is described in Patent Document 1 has a configuration in which keyholes are provided at two locations on the surface and side surfaces of a landing door. First, when the unlocking key is inserted and operated from the keyhole on the surface and the landing door is opened by a predetermined distance, the landing door is temporarily stopped at that position. Next, the unlocking key is inserted into the side keyhole and operated to completely open the landing door.
With this apparatus, the landing door stops once when it is opened by a predetermined distance, so it is possible to check whether there is a car at the landing. Therefore, even when a manager who is unfamiliar with the elevator opens the landing door, it is possible to prevent an accident that the elevator falls accidentally.

JP-A-9-175759

  In the case of the said apparatus, there exists a problem that it is necessary to provide a keyhole in two places, the surface and side surface of a landing door.

  The present invention provides a fixing means provided on the landing side, an engagement means provided on the landing door side, and prevents the opening of the landing door by engaging with the fixing means, provided on the car door side, A car-side engaging device for disengaging the fixing means and the engaging means; and an unlocking means for releasing the engagement between the fixing means and the engaging means by an operation from the landing side. The coupling means has a first engagement element and a second engagement element provided so as to be rotatable with respect to the first engagement element, and the fixing means is a fixing piece that engages with the second engagement element. And an auxiliary fixing piece that engages with the first engaging element, and the engagement between the second engaging element and the fixing piece is released by the operation of the unlocking means. When the engagement between the two engaging elements and the fixed piece is released and the landing door is opened by a predetermined distance, When the first engaging element and the auxiliary fixing piece are disengaged, the second engaging element and the fixing piece are also disengaged. It is characterized by the configuration.

According to the present invention, the engaging means is provided with a stopper, and the stopper restricts the rotation of the second engaging element.
Further, according to the present invention, the engaging means is provided with an auxiliary unlocking lever. By operating the auxiliary unlocking lever, the engagement between the first engaging element and the auxiliary fixing piece is released. It is characterized by being.

Further, the present invention is characterized in that the car-side engagement device operates so that the engagement between the first engagement element and the auxiliary fixing piece is released when the car door is opened. Is.
Further, according to the present invention, the engaging means includes an operating body pivotally attached to the landing door side, and the operating body is provided with the first engaging element and the stopper, and the second engaging element is provided with the operating element. The second engagement element can be pivoted only to one side by the stopper, the operating body is provided with the auxiliary unlocking lever, and the second engagement element is provided with the unlocking mechanism. The unlocking lever operated by the means is provided.

  According to the present invention, a device for preventing an operator from falling into a hoistway when unlocking an elevator landing door from the landing side for maintenance inspection or the like is realized with a relatively simple configuration. be able to.

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

  An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a center double landing door device viewed from the hoistway side, and FIGS. 2, 3 and 4 are operation explanatory views of the landing door unlocking device. In each figure, the same reference numerals as those in FIGS. 7 to 10 denote the same components.

  In the figure, reference numeral 50 denotes an operating body of the present embodiment, which is pivotally attached to the support 10 by a shaft 15 in the same manner as the operating body 12. Unlike the prior art, an auxiliary rod 52 is formed at the tip of the horizontal piece 51 of the operating body 50 and a stopper 53 is provided.

Reference numeral 54 denotes a lock body, which is provided with a flange 16, a contact 17, and an unlocking lever 33 like the conventional horizontal piece 14. One end of the lock body 54 is pivotally attached to the horizontal piece 51 by a shaft 55, and the intermediate part is supported by a stopper 53.
Therefore, the lock body 54 is configured to be rotatable in the clockwise direction with respect to the stopper 53, but is not rotatable in the counterclockwise direction. 56 is an auxiliary unlocking lever fixed to the operating body 50, and 60 is an auxiliary fixing piece fixed to the switch box 20.

Next, the operation of the present embodiment will be described. 1 and 2 show a state where the landing door 4 is closed and locked.
In a 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 come to positions indicated by two-dot chain lines.

When the car door starts to open, the fixed engagement plate 40 moves to the right (door opening direction) in FIG. 2 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 50 rotates about the shaft 15 in the clockwise direction. Further, when pressed by the stopper 53, the lock body 54 rotates together with the operating body 50 in the clockwise direction.
As a result, the hook 16 comes to a position where it does not engage with the fixing piece 22, and the auxiliary hook 52 comes to a position where it does not engage with the auxiliary fixing piece 60. Further, 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.
The unlocking key 35 is inserted into the keyhole 34 from the landing side (the other side in FIG. 3), and rotates counterclockwise in FIG. As a result, the lateral 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 lock body 54 rotates clockwise about the shaft 55.

  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. Thereby, the landing door 4 becomes movable in the door opening direction.

However, since the operating body 50 remains in its original position, as shown in FIG. 4, when the landing door 4 is opened, the auxiliary rod 52 engages with the auxiliary fixing piece 60 and stops. That is, the landing door 4 stops once it is opened by a predetermined distance.
Here, when a hand is put in from the space 42 formed when the landing door 4 is opened and the auxiliary unlocking lever 56 is pulled leftward in FIG. 4, the operating body 50 rotates clockwise about the shaft 15. To do. As a result, the auxiliary rod 52 is raised, the engagement with the auxiliary fixing piece 60 is released, and the landing door 4 can be fully opened.
Further, in order to change the landing door 4 from the fully open state to the fully closed state, it is only necessary to close the landing door 4.

  As described above, when the door is opened, the landing door 4 is temporarily stopped when the door is opened by a predetermined distance. Therefore, even when a manager or the like unfamiliar with the elevator opens the landing door 4, an accidental accidental fall to the hoistway is prevented. be able to.

  As described above, since the present embodiment can be realized only by adding the auxiliary fixing piece 60 to the switch box 20 and changing the structure of the operating body 50, it is not necessary to have a complicated structure as in the prior art. . Therefore, it can also be easily implemented in existing elevators.

  Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 5A is a plan view of the landing door unlocking device, FIG. 5B is a front view of the same, and FIG. 6 is an operation explanatory view of the landing door unlocking device, corresponding to a cross-sectional view of the main part of FIG. FIG. In each figure, the same reference numerals as those in FIGS. 1 to 4 denote the same components.

In the figure, reference numeral 70 denotes an auxiliary unlocking lever provided on the horizontal piece 51, and the lower end portion is bent in an L-shaped cross section to form a horizontal portion 70 a and extends to the vicinity of the keyhole 34.
Reference numeral 71 denotes a stopper provided on the horizontal piece 51, which performs the same function as the stopper 53. Therefore, in FIG. 5B, the lock body 54 can be rotated more clockwise than the stopper 71, but cannot rotate counterclockwise.

  In the case of normal operation, that is, when the door opening operation is performed by the fixed engagement plate 40 and the movable engagement plate 41 of the car door, it is the same as the above embodiment.

Next, the case where the landing door 4 is opened from the landing using the unlock key 35 will be described.
The unlocking key 35 is inserted into the keyhole 34 from the landing side (left side in FIG. 6) and rotated counterclockwise in FIG. 5 (b). As a result, the horizontal 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 in FIG. 5B, and the lock body 54 is centered on the shaft 55. Rotate in the direction.

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. Thereby, the landing door 4 becomes movable in the door opening direction.
However, since the operating body 50 remains in its original position as in the above-described embodiment, when the landing door 4 is opened, the auxiliary rod 52 engages with the auxiliary fixing piece 60 and stops. That is, the landing door 4 stops once it is opened by a predetermined distance.

Here, as shown by a two-dot chain line in FIG. 6, the unlocking key 35 is pushed to a position where the auxiliary unlocking lever 70 can be operated by the unlocking key 35, and the unlocking key 35 is moved to the position shown in FIG. Rotates counterclockwise. As a result, the lateral portion 70a of the auxiliary unlocking lever 70 is pushed by the unlocking key 35, the lower part of the auxiliary unlocking lever 70 moves to the left in FIG. 5B, and the operating body 50 is centered on the shaft 15. Rotate clockwise. As a result, the auxiliary rod 52 is raised, the engagement with the auxiliary fixing piece 60 is released, and the landing door 4 can be fully opened.
Further, in order to change the landing door 4 from the fully open state to the fully closed state, it is only necessary to close the landing door 4.

Also in the present embodiment, when the door is opened, the landing door 4 stops once when it is opened by a predetermined distance. Therefore, even if an administrator unfamiliar with the elevator opens the landing door 4, it accidentally falls into the hoistway. Can be prevented.
In the present embodiment, the auxiliary unlocking lever 70 is arranged near the keyhole 35, and the lateral portion 33a of the unlocking lever 33 and the lateral portion 70a of the auxiliary unlocking lever 70 are arranged so as not to interfere with each other. Therefore, both the unlocking lever 33 and the auxiliary unlocking lever 70 can be operated by the unlocking key 35.

In the above-described embodiment, the switch box 20 is fixed to the rail 3. However, the present invention is not limited to this. The switch box 20 may be fixed to the landing side, that is, the fixed side of a building or tower where an elevator is installed.
1 to 4, the attachment position of the auxiliary unlocking lever 56 to the operating body 50 is not limited to the position shown in FIG. 1, and the tip of the horizontal piece 51 as shown in FIG. 5. If it is provided on the side, it becomes easy to operate when putting a hand from the space 42. Furthermore, the shape of the auxiliary unlocking lever 56 may be any shape that can be easily operated by hand.

  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 10 support 16 鉤 17 contact 20 switch box 22 fixed piece 24 contact 33 unlocking lever 34 key hole 35 unlocking key 40 fixed engagement plate 41 movable engagement plate 50 actuating body 52 auxiliary rod 53, 71 stopper 54 lock body 56 , 70 Auxiliary unlocking lever 60 Auxiliary fixing piece

Claims (5)

A fixing means provided on the landing side, an engagement means provided on the landing door side, and engaged with the fixing means to prevent the landing door from being opened, and provided on the car door side, and engaged with the fixing means. A car-side engaging device that disengages the engaging means, and an unlocking means that disengages the fixing means and the engaging means by an operation from the landing side.
The engaging means includes a first engaging element and a second engaging element provided so as to be rotatable with respect to the first engaging element.
The fixing means includes a fixing piece that engages with the second engagement element, and an auxiliary fixing piece that engages with the first engagement element.
The second engagement element and the fixed piece are disengaged by the operation of the unlocking means,
The second engagement element and the fixed piece are disengaged, and the landing door is opened by a predetermined distance, whereby the first engagement element and the auxiliary fixed piece are engaged.
The unlocking of the elevator hall door is configured such that when the engagement between the first engagement element and the auxiliary fixing piece is disengaged, the engagement between the second engagement element and the fixing piece is also disengaged. apparatus.   2. The elevator hall door unlocking device according to claim 1, wherein the engaging means is provided with a stopper, and the stopper restricts the rotation of the second engaging element. 3.   The engaging means is provided with an auxiliary unlocking lever, and by operating the auxiliary unlocking lever, the first engaging element and the auxiliary fixing piece are disengaged from each other. The elevator landing door unlocking device according to claim 1 or 2.   The said cage | basket | car engagement apparatus is a structure which operate | moves so that the engagement of the said 1st engagement element and the said auxiliary | assistant fixing piece may be disengaged when the said car door is opened. The elevator hall door unlocking device according to any one of the above. The engagement means has an operating body pivotally attached to the landing door side,
The operating body is provided with the first engagement element and a stopper, and the second engagement element is pivotally attached. The second engagement element can be rotated only to one side by the stopper. The operating body is provided with the auxiliary unlocking lever,
The unlocking device for an elevator hall door according to claim 3 or 4, wherein the second engaging element is provided with an unlocking lever operated by the unlocking means.