JP2009256045A - Door device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door device of an elevator capable of reducing loads normally required and surely performing blocking of door closing operation in the event of a power failure by a relatively simple structure. <P>SOLUTION: This door device of the elevator opening/closing a car door 6 and a landing door in an engaged condition by door driving means (7, 8, 9, 10, 11) provided in a car 1, is provided with a gear wheel-like stopper 20 provided in the pulley 9 of the door driving means, a lever 21 engageable with this stopper, and a solenoid 22 operating the lever. Normally, the lever is retained at a position not contacted with the stopper by the solenoid, and in response to power blockade during door opening/closing operation, the lever is released from the solenoid, and engaged with the stopper by its own weight. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator door device, and more particularly to an elevator door device that controls closing of a car door and a landing door that accompany power shut-off during a door opening / closing operation.

  In general, an elevator door is composed of a car door having a door driving means and a landing door that engages with the car door and opens and closes, and a force in a normally closing direction is applied to the landing door by a spring or a weight. is doing. For this reason, if the power of the drive unit is cut off due to a power failure or the like during the door opening or closing operation, the landing door and the car door engaged with the landing door will self-close, and a loud collision noise will occur at the closed end. There were problems that occurred or passengers were caught in the closing door.

Therefore, conventionally, an urging means for urging the car door in the door opening direction so as to be a resistance at the time of the door closing operation is provided to slow down the door closing operation at the time of a power failure (for example, see Patent Document 1), or By providing an electromagnetic brake that brakes the car door and interlocking the operation of the electromagnetic brake with the energized state of the door motor, the car door is braked with the electromagnetic brake when the power to the door motor is cut off, and the door closing operation is performed. What is made slow is proposed (for example, refer patent document 2).
JP 2007-302424 (paragraph numbers 0038 to 0049, FIG. 2) JP-A-9-242418 (paragraph numbers 0008 to 0014, FIG. 1)

  However, in the thing of the patent document 1 mentioned above, since it is comprised so that the resisting force of an urging means may always urge in the door opening direction, a load will be applied to a door drive means at the time of normal opening and closing, and this load In order to cope with this, there is a problem that the apparatus becomes large or complicated.

  Moreover, in the thing of patent document 2 mentioned above, in order to hold | maintain the brake force which only stops a door at the time of a power failure so that it may not operate at the time of normal opening and closing, a comparatively big force is required, and a big load is applied to an electric circuit. In addition, there is a drawback that the degree of freedom of installation is reduced due to the increase in size of the holding mechanism.

  The present invention was made from the actual situation in the above-described prior art, and the object thereof is a relatively simple structure, which can reduce the load required during normal operation and can reliably prevent the door closing operation during a power failure. The object is to provide an elevator door device.

  In order to achieve the above object, an invention according to claim 1 of the present invention provides an elevator door device that opens and closes a car door and a landing door in a state in which the car door and the landing door are engaged by door drive means provided on the car. A gear-like stopper provided on the pulley of the means, a lever that can be engaged with the gear-like stopper, and a solenoid that operates the lever are provided. Normally, the lever does not contact the gear-like stopper by the solenoid. While being held in position, the lever is released from the solenoid and engaged with the gear-shaped stopper by its own weight in response to power interruption during the door opening / closing operation.

  In the invention according to claim 1 of the present invention configured as above, the lever is normally held at a position where it does not contact the gear-like stopper by the solenoid, and the car door and the landing door can be opened and closed by the door driving means. It has become. On the other hand, the solenoid releases the lever in response to the power interruption during the door opening and closing operation, whereby the lever is displaced by its own weight and engages with the gear-like stopper to prevent the pulley from rotating, and the car door and landing Door closing is also prevented. In this way, it is only necessary to hold the lever, which is a relatively small member, in the normal time by the solenoid, and therefore the load required in the normal time can be reduced. On the other hand, according to the power interruption during the door opening / closing operation, the lever is displaced by its own weight and engaged with the gear-shaped stopper, so that the door closing operation can be reliably prevented during a power failure.

  The invention according to claim 2 of the present invention is characterized in that the lever prevents only the pulley from rotating in the closing direction.

  In the invention according to the first aspect of the present invention configured as described above, when the lever is displaced and engaged with the gear-like stopper at the time of a power failure, the lever only prevents the pulley from rotating in the closing direction. Therefore, for example, even when there are passengers in the car and the power is cut off during the door opening and closing operation, this device operates, and even if the car door and the landing door are blocked during the operation, It can be opened manually, allowing emergency escape.

  According to the present invention, with a relatively simple structure, the door closing operation can be surely prevented during a power failure, and the load required during normal operation can be reduced. The degree of freedom can be increased.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an elevator door device according to the present invention will be described with reference to the drawings.

  FIG. 1 is an overall front view showing an embodiment of an elevator door device according to the present invention, FIG. 2 is an enlarged view of a main part showing a state in which a lever of the door device is engaged with a gear-shaped stopper, and FIG. It is a principal part enlarged view which shows the state with which the lever was hold | maintained with the solenoid.

  As shown in FIG. 1, the elevator door device has a door hanger case 2 and a door rail 3 arranged at the upper part of the entrance / exit of the car 1, and the upper part thereof is suspended by the door rail 3 via the door hanger 4 and the lower part is a car sill. The car door 6 that is guided by 5 and opens and closes in the door hanger 4, the engaging portion 7 that can be engaged with a landing door that is provided at a building entrance and exit of each floor (not shown), and the car door 6 in the opening and closing direction. A pair of pulleys 8, 9, a belt 10 wound around these pulleys 8, 9, a motor 11 that drives the pulley 8, and a belt coupling fitting 12 that couples the car door 6 to the belt 10. Then, the pulley 8 is rotated by the power of the motor 7, and the car door 6 is opened and closed by driving the belt 10 in the opening and closing direction. In addition, the door drive means mentioned above consists of the engaging part 7, the pulleys 8 and 9, the belt 10, and the motor 11, for example.

  The door device of the present embodiment is provided with a gear-like stopper 20 provided on the pulley 9, a lever 21 that can be engaged with the gear-like stopper 20, and a solenoid 22 that operates the lever 21. Further, during normal operation, the solenoid 22 sucks the lever 21 and holds it in a position where it does not come into contact with the gear-shaped stopper 20 as shown in FIG. An electric circuit (not shown) is constructed so as to release the lever 21. The release of the solenoid 22 causes the lever 21 to be displaced while rotating downward in the drawing due to its own weight as shown in FIG. Further, the lever 21 prevents only the rotation of the pulley 9 in the closing direction, that is, the counterclockwise rotation in the drawing.

  In the present embodiment, normally, the lever 21 is held by the solenoid 22 at a position where it does not contact the gear-shaped stopper, and the car door 6 and the landing door are opened and closed in this state. On the other hand, for example, when the car 1 stops at a predetermined floor and the car door 6 and the landing door are opened to face each other, a power failure occurs, and the power to the motor 11 is cut off, the solenoid 22 The lever 21 is released, whereby the lever 21 is displaced by its own weight and engages with the gear-like stopper 20 to prevent the pulley 9 from rotating. At this time, a force to self-close acts on the landing door and the car door 6 engaged with the landing door in accordance with the power cut-off to the motor 11, but the pulley 9 is prevented from rotating. The car door 6 and the landing door are prevented from closing. The lever 21 prevents the rotation of the pulley 9 in the closing direction, that is, only the counterclockwise rotation in the drawing, so that the power is cut off while the passenger is in the car 1 and during the door opening / closing operation. Thus, even if the device is activated and the closing operation of the car door 6 and the landing door is blocked halfway, the car door 6 and the landing door door can be opened manually, and the passenger can escape from the car.

  According to the present embodiment, it is only necessary to hold the lever 21 which is a relatively small member by the solenoid 22 in the normal time, and therefore, the load required in the normal time can be reduced. On the other hand, the lever 21 is displaced by its own weight and engaged with the gear-shaped stopper 20 in accordance with the power interruption during the door opening / closing operation, so that the door closing operation can be reliably prevented during a power failure. And with a relatively simple structure, the door closing operation can be reliably prevented during a power outage, and the load required during normal times can be reduced, thus reducing costs and increasing the degree of freedom of installation. Can do.

1 is an overall front view showing an embodiment of an elevator door device according to the present invention. It is a principal part enlarged view which shows the state which the lever of the door apparatus engaged with the gear-shaped stopper. It is a principal part enlarged view which shows the state with which the lever of the door apparatus was hold | maintained by the solenoid.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Door hanger case 3 Door rail 4 Door hanger 5 Car sill 6 Car door 7 Engagement part (door drive means)
8, 9 Pulley (door drive means)
10 Belt (door drive means)
11 Motor (door drive means)
12 Belt connecting bracket 20 Gear-shaped stopper 21 Lever 22 Solenoid

Claims (2)

In an elevator door device that opens and closes in a state where a car door and a landing door are engaged by door driving means provided on the car,
A gear-like stopper provided on the pulley of the door driving means, a lever that can be engaged with the gear-like stopper, and a solenoid that operates the lever are provided. Normally, the lever is moved to the gear-like stopper by the solenoid. An elevator door device characterized in that the lever is released from the solenoid and engaged with the gear-shaped stopper by its own weight in response to a power interruption during a door opening / closing operation while being held at a position where it does not contact.   The elevator door device according to claim 1, wherein the lever only prevents rotation of the pulley in a closing direction.

Images