JP6777033B2 - Elevator landing door unlocking device - Google Patents

Description

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

Conventionally, when the elevator landing door is opened from the landing side for maintenance and inspection or rescue of passengers in the car, when a manager who is unfamiliar with the elevator opens the landing door, if there is no car in the landing, the landing door There was a possibility of falling into the hoistway when the door opened.
An example of the structure of this conventional landing door will be described with reference to FIGS. 7 to 10. FIG. 7 is a front view of the central double-door landing door device as 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 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 6 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.
Reference numeral 33 denotes an unlocking lever provided on the horizontal piece 14, and the lower end portion thereof is bent into an L-shaped cross section to form a horizontal portion 33a, which extends to the vicinity of 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 or the like, the unlock key 35 hits the lateral portion 33a of the unlock lever 33 as shown in FIG. 9, and the unlock lever 33 is released. It is arranged so that it 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. 7 and 8 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, the fixed engaging plate 40 and the movable engaging plate 41 of the car door come to the positions indicated by the two-point chain line.

When the car door starts to open, the fixed engaging plate 40 moves to the right side (door opening direction) in FIG. 8 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 (FIG. 10). 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.
The unlocking key 35 is inserted into the keyhole 34 from the landing side (the other side of FIG. 9) and rotates 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 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 (FIG. 10).

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

For example, the one described in Patent Document 1 has a configuration in which keyholes are provided at two locations on the surface and the side surface of the landing door. First, the unlocking key is inserted through the keyhole on the surface and operated, and when the landing door is opened by a predetermined distance, the landing door temporarily stops at that position. Next, the unlocking key is inserted into the keyhole on the side and operated to completely open the landing door.
With this device, the landing door stops once when it is opened by a predetermined distance, so it is possible to check whether or not 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 of accidentally falling into the hoistway.

Japanese Unexamined Patent Publication No. 9-175759

In the case of the above device, there is a problem that it is necessary to provide keyholes on the surface and the side surface of the landing door.

The present invention includes a fixing means provided on the landing side, an engaging means provided on the landing door side and preventing the opening of the landing door by engaging with the fixing means, and an engaging means provided on the car door side. The engagement device provided with a car-side engaging device for disengaging the fixing means and the engaging means and an unlocking means for disengaging the fixing means and the engaging means by an operation from the landing side. The fitting means has a first engaging element and a second engaging element rotatably provided with respect to the first engaging element, and the fixing means is a fixing piece that engages with the second engaging 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 disengaged by the operation of the unlocking means. 2 The engagement of the engaging element and the fixing piece is disengaged, and the landing door is opened by a predetermined distance, so that the first engaging element and the auxiliary fixing piece are engaged with each other. It is characterized in that when the auxiliary fixing piece is disengaged, the engagement between the second engaging element and the fixing piece is also disengaged.

Further, the present invention is characterized in that the engaging means is provided with a stopper, and the stopper limits the rotation of the second engaging element.
Further, in the present invention, 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. It is characterized by being.

Further, the present invention is characterized in that the car-side engaging device operates so that the first engaging element and the auxiliary fixing piece are disengaged when the car door is opened. It is a thing.
Further, in the present invention, the engaging means has an operating body pivotally attached to the landing door side, and the operating body is provided with the first engaging element and a stopper, and the second engaging element is provided. It is pivotally attached, the second engaging element can be rotated only to one side by the stopper, the operating body is provided with the auxiliary unlocking lever, and the second engaging element is unlocked. It is characterized in that an unlocking lever operated by means is provided.

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

It is a front view which looked at the landing door device of the central double door by embodiment of this invention from the hoistway side. It is operation explanatory drawing of the landing door unlocking device by embodiment of this invention. It is operation explanatory drawing of the landing door unlocking device by embodiment of this invention. It is operation explanatory drawing of the landing door unlocking device by embodiment of this invention. It is a top view and the front view of the landing door unlocking device according to another embodiment of this invention. It is an operation explanatory view of the landing door unlocking apparatus by another embodiment of this invention, and is the figure corresponding to the cross-sectional view of the main part of FIG. 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 device. It is operation explanatory drawing of the conventional landing door unlocking device. It is operation explanatory drawing of the conventional landing door unlocking device.

Embodiments of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a front view of a central double-door landing door device as 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 indicate the same ones.

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 like the operating body 12. Unlike the above-mentioned prior art, an auxiliary hook 52 is formed at the tip of the lateral piece 51 of the operating body 50, and a stopper 53 is provided.

Reference numeral 54 denotes a lock body, which includes a hook 16, a contact 17, and an unlocking lever 33 as in the conventional horizontal piece 14. One end of the lock body 54 is pivotally attached to the horizontal piece 51 by the shaft 55, and the intermediate portion is supported by the stopper 53.
Therefore, the lock body 54 is rotatable on the clockwise side of the stopper 53, but cannot be rotated on the counterclockwise side. Reference numeral 56 denotes an auxiliary unlocking lever fixed to the operating body 50, and reference numeral 60 denotes an auxiliary fixing piece fixed to the switch box 20.

Next, the operation of this embodiment will be described. 1 and 2 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, the fixed engaging plate 40 and the movable engaging plate 41 of the car door come to the positions indicated by the two-point chain line.

When the car door starts to open, the fixed engaging plate 40 moves to the right side (door opening direction) in FIG. 2 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 50 rotates clockwise around the shaft 15. Further, pushed by the stopper 53, the lock body 54 also rotates clockwise together with the operating body 50.
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 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.
The unlock 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 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 lock body 54 rotates clockwise around the shaft 55.

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. As a result, the landing door 4 can be moved 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 hook 52 engages with the auxiliary fixing piece 60 and stops. That is, the landing door 4 stops once when it is opened by a predetermined distance.
Here, when a hand is put in from the space 42 created when the landing door 4 is opened and the auxiliary unlocking lever 56 is pulled to the left in FIG. 4, the operating body 50 rotates clockwise around the shaft 15. To do. As a result, the auxiliary hook 52 is raised, the engagement with the auxiliary fixing piece 60 is disengaged, 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 sufficient to simply close the landing door 4.

In this way, when the door is opened, the landing door 4 is temporarily stopped when it is opened by a predetermined distance, so that even if a manager who is unfamiliar with the elevator opens the landing door 4, an accident of accidentally falling into the hoistway can be prevented. be able to.

As described above, 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, so that it is not necessary to have a complicated structure as in the conventional case. .. Therefore, it can be easily implemented in an existing elevator.

Next, other embodiments of the present invention will be described with reference to FIGS. 5 and 6. 5 (a) is a plan view of the landing door unlocking device, FIG. 5 (b) is also a front view, and FIG. 6 is an operation explanatory view of the landing door unlocking device, which corresponds to a cross-sectional view of a main part of FIG. It is a figure. In each figure, the same reference numerals as those in FIGS. 1 to 4 indicate the same ones.

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

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

Next, a case where the landing door 4 is opened from the landing by using the unlock key 35 will be described.
The unlock key 35 is inserted into the keyhole 34 from the landing side (left side in FIG. 6) and rotates counterclockwise in FIG. 5 (b). 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 in FIG. 5B, and the lock body 54 watches around the axis 55. Rotate in the direction.

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. As a result, the landing door 4 can be moved in the door opening direction.
However, as in the above embodiment, since the operating body 50 remains in the original position, when the landing door 4 is opened, the auxiliary hook 52 engages with the auxiliary fixing piece 60 and stops. That is, the landing door 4 stops once when it is opened by a predetermined distance.

Here, as shown by the alternate long and short dash line in FIG. 6, the unlock key 35 is pushed until the position where the auxiliary unlock lever 70 can be operated by the unlock key 35, and the unlock key 35 is pressed in FIG. 5 (b). Rotate 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 hook 52 is raised, the engagement with the auxiliary fixing piece 60 is disengaged, 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 sufficient to simply close the landing door 4.

Also in this embodiment, when the door is opened, the landing door 4 is temporarily stopped when the door is opened by a predetermined distance. Therefore, even if a manager or the like who is unfamiliar with the elevator opens the landing door 4, he / she accidentally falls into the hoistway. Can be prevented.
Further, 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 do not 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 embodiment, the switch box 20 is fixed to the rail 3, but the present invention is not limited to this, and the switch box 20 may be fixed to the landing side, that is, the fixed side such as a building or a tower where an elevator is installed.
Further, in the embodiment of FIGS. 1 to 4, the mounting position of the auxiliary unlocking lever 56 to the operating body 50 is not limited to the position of FIG. 1, and as shown in FIG. 5, the tip of the horizontal piece 51 If it is provided on the side, it becomes easy to operate when operating by putting a hand from the space 42. Further, the shape of the auxiliary unlocking lever 56 may be any shape that is easy to operate by hand.

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 10 Support 16 Hook 17 Contact 20 Switch box 22 Fixed piece 24 Contact 33 Unlocking lever 34 Keyhole 35 Unlocking key 40 Fixed engaging plate 41 Movable engaging plate 50 Actuating body 52 Auxiliary hook 53, 71 Stopper 54 Locking body 56 , 70 Auxiliary unlocking lever 60 Auxiliary fixing piece

Claims (5)

A fixing means provided on the landing side, an engaging means provided on the landing door side and preventing the opening of the landing door by engaging with the fixing means, and an engaging means provided on the car door side and engaging with the fixing means. In a device provided with a car-side engaging device for disengaging the coupling means and an unlocking means for disengaging the fixing means and the engaging means by an operation from the landing side.
The engaging means has a first engaging element and a second engaging element rotatably provided with respect to the first engaging element.
The fixing means has a fixing piece that engages with the second engaging element and an auxiliary fixing piece that engages with the first engaging element.
The structure is such that the engagement between the second engaging element and the fixing piece is disengaged by the operation of the unlocking means.
The configuration is such that the first engager and the auxiliary fixing piece are engaged by disengaging the second engaging element and the fixing piece and opening the landing door by a predetermined distance.
If a state where engagement of the auxiliary fixing piece with said first engaging member is disengaged, Ri configuration der to become engaged also disengaged state of the fixing piece and the second engaging finger,
An elevator landing door unlocking device characterized in that the engaging means is provided with a stopper, and the stopper limits the rotation of the second engaging element . 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 unlocking device for the elevator landing door according to claim 1 . Claim 1 or 2 is characterized in that the car-side engaging device is configured to operate so that the first engaging element and the auxiliary fixing piece are disengaged when the car door is opened. elevator hall unlocking apparatus of the door as set forth in. A fixing means provided on the landing side, an engaging means provided on the landing door side and preventing the opening of the landing door by engaging with the fixing means, and an engaging means provided on the car door side and engaging with the fixing means. In a device provided with a car-side engaging device for disengaging the engaging means and an unlocking means for disengaging the fixing means and the engaging means by an operation from the landing side.
The engaging means has a first engaging element and a second engaging element rotatably provided with respect to the first engaging element.
The fixing means has a fixing piece that engages with the second engaging element and an auxiliary fixing piece that engages with the first engaging element.
The structure is such that the engagement between the second engaging element and the fixing piece is disengaged by the operation of the unlocking means.
The configuration is such that the first engager and the auxiliary fixing piece are engaged by disengaging the second engaging element and the fixing piece and opening the landing door 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.
An auxiliary unlocking lever is provided in the engaging means, and by operating the auxiliary unlocking lever, the first engaging element and the auxiliary fixing piece are disengaged.
The engaging means has a working body pivotally attached to the landing door side.
The operating body is provided with the first engaging element and a stopper, and the second engaging element is pivotally attached. The second engaging element can be rotated only to one side by the stopper, and further described above. The operating body is provided with the auxiliary unlocking lever.
An elevator landing door unlocking device characterized in that the second engaging element is provided with an unlocking lever operated by the unlocking means. A fixing means provided on the landing side, an engaging means provided on the landing door side and preventing the opening of the landing door by engaging with the fixing means, and an engaging means provided on the car door side and engaging with the fixing means. In a device provided with a car-side engaging device for disengaging the engaging means and an unlocking means for disengaging the fixing means and the engaging means by an operation from the landing side.
The engaging means has a first engaging element and a second engaging element rotatably provided with respect to the first engaging element.
The fixing means has a fixing piece that engages with the second engaging element and an auxiliary fixing piece that engages with the first engaging element.
The structure is such that the engagement between the second engaging element and the fixing piece is disengaged by the operation of the unlocking means.
The configuration is such that the first engager and the auxiliary fixing piece are engaged by disengaging the second engaging element and the fixing piece and opening the landing door 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.
The car-side engaging device is configured to operate so that the first engaging element and the auxiliary fixing piece are disengaged when the car door is opened.
The engaging means has a working body pivotally attached to the landing door side.
The operating body is provided with the first engaging element and a stopper, and the second engaging element is pivotally attached. The second engaging element can be rotated only to one side by the stopper, and further described above. The operating body is provided with the auxiliary unlocking lever.
An elevator landing door unlocking device characterized in that the second engaging element is provided with an unlocking lever operated by the unlocking means.