JP5231868B2 - Elevator safety device - Google Patents

Description

  The present invention relates to an elevator safety device, and more particularly to an elevator safety device that prevents a car from continuing to travel while a string-like foreign object is sandwiched between doors.

As a safety device for this type of elevator, for example, one disclosed in Patent Document 1 has been proposed. In the technique described in Patent Document 1, the detection rod is rotated once in the space between the car and the landing place after the entrance to the car is fully closed and before the car travels. That is, for example, if a string-like foreign object is sandwiched between both the car-side door and the landing-side door, the rotation of the detection rod is hindered by the foreign object, so the time required for the detection rod to make one rotation It becomes longer than the case where the foreign matter does not exist. Therefore, if it takes a predetermined time or more for the detection rod to make one rotation, it is determined that a string-like foreign object is sandwiched between the car-side door and the landing-side door, and the car-side door is moved without running the car. And the landing side door is opened.
JP-A-7-267549

  However, in the technique described in Patent Document 1, since the detection rod is rotated after the car side doorway is fully closed and it is confirmed that the foreign matter does not exist, the car is driven. Since it takes time to fully drive the car after it is fully closed, the elevator operation efficiency is lowered, which is not preferable.

  The present invention has been made in view of the above-described problems, and in particular, provides an elevator safety device that can reliably detect string-like foreign matters without reducing the operation efficiency of the elevator. It is said.

The invention according to claim 1 is a safety device for an elevator that prevents a car from continuing to run while a foreign object is sandwiched in a door that opens and closes an entrance to the car.
Corresponding to the space between the car and the landing along the width direction of the doorway, a plurality of pulleys that are provided on the cage and over which the cord is hung, and the tension of the cord An emergency stop control means for outputting an emergency stop signal, and a part of the cable-like body is stretched above the car side entrance along the width direction of the car side entrance, On the condition that the other part of the cable-like body is stretched under the car side doorway along the width direction of the car side doorway, and the emergency stop control means outputs an emergency stop signal while the car is running. It is characterized by stopping the car.

  According to the first aspect of the present invention, when the car travels with a foreign object sandwiched in the door, the foreign object and the cord are relatively displaced and both are caught, and the tension of the cord changes. The foreign object detection means outputs an emergency stop signal in accordance with the tension of the cord-like body, thereby stopping the car that has started running with the foreign object sandwiched in the door.

More specifically, the cord-like body is hung on a plurality of pulleys provided in the car, and a part of the cord-like body is stretched above the car-side entrance / exit along the width direction of the car-side entrance / exit. On the other hand, the other part of the cable-like body is stretched along the width direction of the car side doorway below the car side doorway, so that the car can be held in a state where foreign objects are caught in the car side door. When the cage rises, foreign matter is caught in the portion of the cord-like body that is stretched below the car-side entrance, and when the cage descends with the foreign matter sandwiched in the cage-side door, A foreign object is caught by the site | part stretched above the cage | basket side entrance / exit in the body.

Preferably, as described in claim 2, it has a biasing means for pulling one end of the cord-like body and applying a predetermined tension to the cord-like body, and one end of the cord-like body is the above-mentioned When it is possible to displace the urging force against the urging force of the urging means, when a foreign object caught in the door is caught by the ridge while the car is running, one end of the ridge is By displacing against the urging force, it is possible to reduce the load on the cords and the foreign matter.

More specifically, as described in claim 3, there is provided tension detecting means for detecting the tension of the cord-like body, and when the tension detected by the tension detecting means exceeds a predetermined value, the emergency The stop control means may be configured to output an emergency stop signal.

In addition, as described in claim 4, after the emergency stop control means outputs an emergency stop signal to emergency stop the car, the car is driven to the landing on the departure floor to open the door. Then, the passenger can safely remove the foreign object after the door opening operation.

  Therefore, according to at least the invention described in claim 1, since the foreign matter caught in the door can be detected while the car is running, the car can be run quickly after the entrance to the car room is fully closed. The foreign object can be reliably detected without lowering the operation efficiency of the elevator.

  FIG. 1 is a diagram showing an elevator safety device as a more specific embodiment of the present invention, in which string-like foreign matters existing from the inside of a car to a landing are both in a car-side door and a landing-side door described later. The state sandwiched between the two is illustrated.

  As shown in FIG. 1, a car side doorway 2 through which passengers enter and leave the car 1 is formed in the car 1 of the elevator apparatus, and the car side doorway 2 is a pair of car side doors 3, 4. It can be opened and closed by. As is well known, the car-side doors 3 and 4 are suspended and supported by door rails (not shown) of the door operator 5 provided above the car-side doorway 2. Door shoes 3 a and 4 a provided at the lower end are respectively guided by a sill 6 provided along the width direction of the car side entrance 2. Although illustration is omitted, a landing side entrance is formed at a position corresponding to the landing on each service floor in the peripheral wall of the hoistway, and a pair of landing side doors for opening and closing the landing entrance is not shown. Are engaged with the car-side doors 3 and 4 respectively. FIG. 1 illustrates a state where the car 1 is stopped at a position corresponding to a landing on the service floor, and a virtual line L in FIG. 1 indicates the floor height of the landing on the service floor.

  The door opening / closing type of the car-side doorway 2 is a so-called double-opening type, and the door control device 7 drives the door motor 9 based on a command from the main control device 8 and both doors via a door opening / closing drive mechanism (not shown). The car side doors 3 and 4 are opened and closed. More specifically, the car-side doors 3 and 4 are fully closed by bringing the ends of the car-side doors 3 into contact with each other at a substantially central position in the width direction of the car-side doorway 2. The car-side doorway 2 is opened by the sliding displacement of the car-side doors 3 and 4 in directions away from each other.

  Further, the car 1 is provided with a plurality of pulleys 11 to 16 for tensioning the rope 10 as a cord-like body along a predetermined route in the space between the car 1 and the landing. . More specifically, the first pulley 11 is provided on one end side in the longitudinal direction of the sill 6 and is rotatable around the vertical axis, and in a direction orthogonal to the outer wall surface in which the car side doorway 2 of the car 1 is formed. A second pulley 12 that is offset from the first pulley 11 and is rotatable about an axis along the width direction of the car side doorway 2, and is provided on one end side in the longitudinal direction of the door operator 5. A third pulley 13 that can be rotated around an axis along a direction orthogonal to the outer wall surface on which the car-side entrance 2 is formed, and provided at the other end in the longitudinal direction of the door operator 5 and can be rotated around a vertical axis. The fourth pulley 14 is offset from the fourth pulley 14 in a direction orthogonal to the outer wall surface of the car 1 where the car-side entrance 2 is formed, and is around the axis parallel to the axis of the second pulley 12. And a fifth pulley 15 that is rotatable, It provided above the pulley 15, a sixth pulley 16 axis and rotatable parallel to the axis about the third pulley 13, but are provided on each of the car 1. And the rope 10 is respectively hung on each of these pulleys 11-16.

  Further, the end of the rope 10 on the first pulley 11 side is locked by a locking member 17 provided on the other longitudinal end side of the sill 6, while the end of the rope 10 on the sixth pulley 16 side. The part is connected to a load cell 18 as a tension detecting means.

  Accordingly, a portion of the rope 10 between the locking member 17 and the first pulley 11 is stretched along the width direction of the car side entrance 2 below the car side entrance 2 while the rope 10 Among these, a portion between the third pulley 13 and the fourth pulley 14 is stretched above the car side entrance 2 along the width direction of the car side entrance 2.

  Further, the load cell 18 is constantly urged in the direction of pulling the rope 10 by a spring 19 as urging means, and the end of the spring 19 on the side opposite to the load cell 18 is locked by a locking member 20. In other words, the spring 19 pulls one end of the rope 10 through the load cell 18 to always apply a predetermined tension to the rope 10, and the load cell 18 applies an emergency proportional to the tension of the rope 10 as an emergency stop control means. It outputs to the stop control apparatus 21.

  The emergency stop control device 21 outputs an emergency stop signal to the main control device 8 when the output voltage of the load cell 18, that is, the tension of the rope 10 exceeds a predetermined set value.

  FIG. 2 is a view showing a state in which the car 1 is lowered while the foreign object F is sandwiched between the car-side doors 3 and 4, and FIG. 3 is a car with the foreign object F being sandwiched between the car-side doors 3 and 4. It is a figure which shows the state which 1 raised.

  In the elevator safety apparatus configured as described above, when the car 1 is lowered with the string-like foreign matter F sandwiched between the car doors 3 and 4 as shown in FIG. The relative movement of F causes foreign matter F to be caught in the portion of the rope 10 between the third pulley 13 and the fourth pulley 14, and the load cell 18 side end of the rope 10 resists the biasing force of the spring 19. Thus, the first pulley 16 is displaced in the loosening direction of the rope 10. And with this displacement, the spring 19 extends and the tension of the rope 10 increases, so that the output voltage of the load cell 18 increases. Thus, when the output voltage exceeds the set value, the emergency stop control device 21 outputs an emergency stop signal to the main control device 8.

  Further, when the foreign matter F is caught on the rope 10, the load cell 18 side end portion of the rope 10 is displaced in the loosening direction, thereby reducing both loads caused by the rope 10 and the foreign matter F being caught.

  Similarly, as shown in FIG. 3, when the car 1 is lifted with the foreign object F sandwiched between the car doors 3 and 4, between the locking member 17 of the rope 10 and the first pulley 11. The foreign material is caught on the part of, and the tension of the rope 10 increases. Accordingly, when the output voltage of the load cell 18 exceeds the set value, the emergency stop control device 21 outputs an emergency stop signal to the main control device 8.

  FIG. 4 is a flowchart illustrating an example of control contents of the main control device.

  On the other hand, the main control device 8 closes the car side doorway 2 together with the landing side doorway (step S1), and starts traveling of the car (step S2), and then inputs an emergency stop signal from the emergency stop control device 21. It is determined whether or not there is (step S3). As a result, if an emergency stop signal is not input, it is further determined whether or not the vehicle has arrived at the destination floor (step S4). If the destination floor is reached in step S4, the car side entrance 2 is opened together with the landing side entrance (step S5), while if the destination floor is not reached in step S4, the process goes to step S3. Return.

  When the emergency stop signal is input in step S3, that is, the foreign object F is sandwiched between the car-side doors 3 and 4, and the emergency stop control device 21 outputs the emergency stop signal to the main control device 8. In this case, the car 1 is immediately stopped (step S6), and the car 1 is prevented from continuing running while the foreign object F is sandwiched between the car-side doors 3 and 4. Then, the car 1 is driven to the departure floor (step S7), and the car side entrance 9 is opened together with the landing side entrance (step S5).

  Therefore, according to the present invention, the car 1 is caused to travel promptly after the door closing operation, and the foreign matter F sandwiched between the car-side doors 3 and 4 is detected while the car 1 is traveling. The foreign object F can be reliably detected without deteriorating the operation efficiency of the elevator.

  Further, when the end of the rope 10 on the load cell 18 side is constantly pulled by the spring 19 and the rope 10 and the foreign object F are caught while the car 1 is running, the end of the rope 10 on the load cell 18 side of the rope 19 Since it is displaced against the urging force, the load on both the rope 10 and the foreign matter F can be reduced, and the rope 10 and the foreign matter F can be prevented from being damaged.

  Furthermore, the main controller 8 is configured to open the door 1 by returning the car 1 to the landing on the departure floor after stopping the car 1 by inputting an emergency stop signal while the car 1 is traveling. There is an advantage that the passenger can safely remove the foreign matter F in a state where the car side doorway 2 is opened after the door opening operation.

  In the present embodiment, an example in which the elevator safety device according to the present invention is applied to an elevator with a door opening / closing type so-called double door opening type is shown, but the present invention can be applied regardless of the door opening / closing type. Needless to say.

  Further, in the present embodiment, the load cell 18 detects the tension of the rope 10, but a displacement sensor may be provided instead of the load cell 18. That is, when the foreign matter F is caught on the rope 10 and the tension of the rope 10 is changed, the spring 19 is extended and the spring 19 side end of the rope 10 is displaced. It is also possible to detect the detected foreign matter F.

The figure which shows the safety device of an elevator as embodiment of this invention. The figure which shows the state which the cage | basket | car shown in FIG. 1 descend | falls. The figure which shows the state which the cage shown in FIG. 1 raised. The figure which shows the control content of the main controller shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Car 2 ... Car side doorway 3 ... Car side door 4 ... Car side door 10 ... Rope (cord)
DESCRIPTION OF SYMBOLS 11 ... 1st pulley 12 ... 2nd pulley 13 ... 3rd pulley 14 ... 4th pulley 15 ... 5th pulley 16 ... 6th pulley 18 ... Load cell (tension detection means)
19 ... Spring (biasing means)
21. Emergency stop control device (emergency stop control means)
F ... Foreign matter

Claims (4)

In the elevator safety device that prevents the car from continuing to run with foreign objects caught in the door that opens and closes the entrance to the car,
A cord-like body stretched along the width direction of the doorway in the space between the car and the landing ;
A plurality of pulleys provided on the cage and on which the cords are hung,
And emergency stop control means for outputting an emergency stop signal in response to the tension of the cord-like member,
With
A part of the cable-like body is stretched above the car-side doorway along the width direction of the car-side doorway, while the other part of the cable-like body is below the car-side doorway. It is stretched along the width direction of
An elevator safety device characterized in that the car is stopped on condition that the emergency stop control means outputs an emergency stop signal while the car is running. There is an urging means for pulling one end of the cord-like body to apply a predetermined tension to the cord-like body, and one end of the cord-like body can be displaced against the urging force of the urging means. safety device for an elevator according to claim 1, characterized in that it in the. Tension detecting means for detecting the tension of the cord-like body is provided, and the emergency stop control means outputs an emergency stop signal when the tension detected by the tension detecting means exceeds a predetermined value . The elevator safety device according to claim 1, wherein the elevator safety device is provided. The emergency stop control means outputs an emergency stop signal to emergency stop the car and then drives the car to the landing on the departure floor to open the door . The elevator safety device according to any one of the above.

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