JP5609268B2 - Winding cylinder type elevator door opening prevention system - Google Patents

Description

  The present invention relates to a door-open traveling prevention system for a winding drum type elevator.

In order to prevent the elevator from opening the door, a double braking device is being introduced. In particular, in order to double the brake system of an existing hoisting type elevator, it is necessary to double the hoisting machine brake or to add another braking system acting on any of the car, the drum, and the rope. .
However, it is extremely difficult to double the hoisting machine brakes or to add new brakes to the car or drum.
In order to achieve the above duplexing, means for braking the rope using a rope brake as shown in the following document 1 is disclosed.

US Pat. No. 5,228,540

However, the rope brake includes a plate member for holding the rope, and the plate member is provided with a groove for passing the rope. For this reason, when the rope moves along the groove of the drum as in the case of a wind drum type elevator, since the position of the rope moves along the groove of the drum, the rope cannot be guided by the groove of the plate member. Therefore, it has the subject that the said rope brake cannot be applied to a winding drum type elevator.

The present invention has been made in order to solve the above-described problems, and is a winding-cylinder elevator that detects the opening of a car door and the like, operates a speed governor, and prevents the car from opening with an emergency stop device. The goal is to obtain a door-opening travel prevention system.

A door-opening travel prevention system for a wound-cylinder elevator according to the present invention is provided in an emergency stop device for emergency stop of a descent of a car, a governor rope connected to the car, and a landing where the car stops. In a roll-type elevator having a landing door and a car door provided in the car,
The sheave is rotated by the speed governor rope, and fly weight that spreads outward by the centrifugal force acting by this rotation. When the speed of the car exceeds a set value, the lowering of the car is stopped by the emergency stop device. A governor, the governor comprising a ratchet that rotates together with the sheave when the car descending speed reaches a preset overspeed; a latch that engages the ratchet; The shoe is configured to be displaceable between a shoe that brakes the governor rope when the ratchet is rotated, a standby position, and an engagement position that rotates the flyweight to engage the latch portion with the ratchet. Detecting at least one of a lever, an actuator connected to the lever and displacing the lever, opening of the landing door and the car door, and based on the detection of the opening A door open detection means for operating the serial actuator, is supplied to該戸open detection means, and a power source is backed up by batteries when a power failure occurs, the latch via the lever based on the actuator operation The emergency stop device is operated by engaging a portion with the ratchet.
According to the door-opening travel prevention system for a winding drum type elevator according to the present invention, when the door opening detecting means detects at least one opening of the landing door or the car door and operates the actuator, the lever is moved based on the operation of the actuator. The latch is engaged with the ratchet and the emergency stop device is operated to stop the car. Accordingly, since the emergency stop device is operated via the governor when the door is opened, it is possible to easily prevent the car from opening the door. Furthermore, even when the power supply of the door opening detection means is interrupted, it is backed up by the storage battery, so that the operation of the emergency stop device due to the power failure can be prevented.

It is preferable that the door opening detection means in the door-opening travel prevention system for a winding drum type elevator according to the present invention detects the opening of the door by detecting the opening of the door for a certain period of time.
For example, when the opening of the door of the door opening detecting means is detected by a switch, it can be prevented that the opening of the door is detected by an instantaneous opening based on a malfunction due to a contact failure of the switch.

According to the door-opening travel prevention system for a winding drum type elevator according to the present invention, it is possible to detect the opening of the door, operate the speed governor, and prevent the car from opening with the emergency stop device.

1 is an overall view of a winding drum type elevator according to an embodiment of the present invention. It is a front view which shows the governor of FIG. It is a door opening detection part of the door opening travel prevention system of the winding drum type elevator shown in FIG.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an overall view of a winding drum type elevator according to an embodiment of the present invention, FIG. 2 is a front view showing the governor of FIG. 1, and FIG. 3 is a door-open running of the winding drum type elevator shown in FIG. It is a door opening detection part of a prevention system.
In FIG. 1, a winding drum type elevator is provided with a driving device 2 at a lower portion in the hoistway 1, and one end portion of a main rope 3 is coupled to a sheave 2 a of the driving device 2, It is wound. A car 4 is suspended from the other end of the main measure 3 via a return wheel 5. In the hoistway 1, a pair of car guide rails 6 that guide the raising and lowering of the car 4 are installed.

 The car 4 has a car door 4a, and an emergency stop device 7 for emergency stopping the car 4 is provided at the lower part. A governor support member 8 is fixed in the vicinity of the upper end of the car guide rail 6. On the governor support member 8, a governor 9 that detects the overspeed of the car 6 and operates the emergency stop device 7 is supported.

A rotatable tensioning wheel 10 is provided in the vicinity of the bottom of the hoistway 1. An upper end portion and a lower end portion of the governor rope 11 are respectively wound around the governor 9 and the tension wheel 10. The governor rope 11 is connected to the safety device 7 through a lever 12 and is circulated and moved as the car 4 is raised and lowered. The hall 13 is provided with a hall door 14 on each floor.

In FIG. 2, the governor 9 has a sheave 21 around which the governor rope 11 is wound. The sheave 21 is supported by a base 23 so as to be rotatable about a sheave shaft 22. A pair of flyweights 25 that are rotatable about a pair of pins 24 are attached to the side surface of the sheave 21. The pair of flyweights 25 are connected to each other by a link 26.

An operating claw 37 is fixed to one end of one flyweight 25. The flyweight 25 is rotated by the centrifugal force generated by the rotation of the sheave 21. As a result, the operating claw 37 is displaced outward in the radial direction of the sheave 21. Between the other end portion of the one flyweight 25 and the sheave 21, a balance spring 27 that opposes the centrifugal force is provided. A car stop switch 28 for operating a brake device (not shown) of the driving device 2 is attached to the base 23.
The car stop switch 28 has a switch lever 28 a that is operated by an operating claw 37.

A latch portion 29 is provided at the other end of one flyweight 25. The base 23 is provided with a ratchet 30 that is rotatable about the sheave shaft 22. The outer periphery of the ratchet 30 is provided with teeth that engage with the latch portion 29 when the flyweight 25 rotates by a preset amount when the sheave 21 rotates counterclockwise in the figure. It has been.

A shoe 32 that is pressed against the governor rope 11 is rotatably attached to an arm 31 that is rotatably attached to the base 23. A spring shaft 33 is passed through the spring receiving portion 31 a of the arm 31. A connection lever 34 is connected between one end of the spring shaft 33 and the ratchet 30. A spring receiving member 35 is provided at the other end of the spring shaft 33. A rope gripping spring 36 for pressing the shoe 32 against the governor rope 11 is provided between the spring receiving portion 31 a and the spring receiving member 35.

A lever 42 is attached to the base 23 so as to be swingable about a shaft 43. One flyweight 25 is provided with a rotatable roller 44 that is pressed when the lever 42 swings.

The actuator 54 is provided with a spring 55. When the solenoid of the actuator 54 is excited, a force is generated in a direction to push the lever 42 back to the normal side against the spring 55, and when the solenoid of the actuator 55 is demagnetized, The lever 42 is pulled to the inspection side (governor operation side) by the spring 55, and when the solenoid of the actuator 54 is excited, the lever 42 is returned to the normal side.

The door opening detection unit 100 as the door opening detection means of the door opening traveling prevention system is formed as shown in FIG. 3, and is closed when the door 4a of the car 4 is closed from the DC power source 101 with a power failure backup. Once the door 4a of the car 4 is opened, the car door switch 103 is opened and the door 14 of the hall provided on each floor is closed. For example, the doors 14 on the first floor to the third floor are opened. Then, it is formed to excite the delayed release type door opening detection relay 107 via the landing door switches 105a to 105c that are opened from the closed state. Furthermore, the door opening detection unit 100 is configured to excite the governor trip relay 117 via the DC power supply 101 and the normally open contact 107 a of the door opening detection relay 107.
When at least one of the car door switch 103 and the landing door switches 105a to 105c is opened, that is, when the door is opened, the door opening detection relay 107 is demagnetized and the normally open contact 107a is opened, and the governor trip relay 117 is turned on. It is formed to demagnetize and shut off the power supply of the solenoid of the actuator 54.

Here, the reason why the delayed release type is used for the door opening detection relay 107 is to prevent the door opening detection relay 107 from being released due to a malfunction due to an instantaneous opening due to a contact failure of the door switches 103 and 105a to 105c.
Furthermore, the DC power supply is provided with a backup for power failure to prevent the operation of the emergency stop device 7 due to a power failure.

The operation of the roll-opening type elevator door open travel prevention system configured as described above will be described with reference to FIGS.
<Normal>
Now, when the car door 4a and the landing door 14 are closed, the car door switch 103 and the landing door switches 105a, 105c are closed to energize the door opening detection relay 107. Since the lever 42 is brought into the state shown in FIG. 2, the latch portion 29 is disengaged from the teeth of the ratchet 30. Thereby, the function of the normal speed governor 9 is operated.

<In case of abnormality>
Now, when either the car door switch 103 or the landing door switches 105a to 105c is opened when the car door 4a or the landing door 14 is opened, the door opening detection relay 107 is released after a certain time from the opening.
When the door open detection relay 107 is released by opening the door, the normally open contact 107a is opened to cut off the power supply of the solenoid of the actuator 54 provided in the speed governor 9, and the lever 42 and the roller 44 are used as the inspection lever. 42 is pressed. Then, the flyweight 25 rotates around the pin 24 and the latch portion 29 engages with the teeth of the ratchet 30.
In this state, when the car 4 is lowered for some reason, the ratchet 30 is slightly rotated together with the sheave 21 and the connecting lever 34 is displaced to the left.
As a result, the shoe 32 comes into contact with the governor rope 11, and the shoe 32 is pressed against the governor rope 11 by the rope gripping spring 36 to brake the governor rope 11. When the circulation of the governor rope 11 is stopped, the car 4 continues to descend, whereby the lever 12 is operated and the emergency stop device 7 operates to prevent the car 4 from running open.

The door-opening travel prevention system for a winding drum type elevator according to the above embodiment is provided at an emergency stop device 7 for emergency stop of the lowering of the car 4, a governor rope 11 connected to the car 4, and a landing where the car 4 stops. In a wound-cylinder elevator having a platform door 14 provided and a car door 4a provided in the car 4, the sheave 21 is rotated by the governor rope 11, and the centrifugal force acting on the rotation causes the sheave 21 to move outward. When the speed of the car 4 exceeds the set value with the spreading fly weight 25, the speed control apparatus 9 is provided to stop the descent of the car 4 by the emergency stop device 7. The speed governor 9 has a descent speed of the car 4 set in advance. A ratchet 30 that rotates with the sheave 21 when the overspeed is reached, a latch 29 that engages the ratchet 30, and a shoe 3 that brakes the governor rope 11 when the ratchet 30 is rotated. And a lever 42 formed to be displaceable between a standby position and an engaging position where the flyweight 25 is rotated to engage the latch portion 29 with the ratchet 30, and the lever 42 is displaced by being connected to the lever 42. And the door opening detector 100 that detects at least one of the opening of the landing door 14 and the car door 4 and operates the actuator 54 based on the detection of the opening. By engaging the latch portion 29 with the ratchet 30 via the lever 42, the emergency stop device 7 is operated.
Thereby, the speed governor 9 is operated based on the detection of the opening of the door of the door opening detection unit 100, and the car 4 can be prevented from running open by the emergency stop device 7.

It is preferable that the door opening detection unit 100 in the door opening traveling prevention system according to the above embodiment detects the opening of the doors 4a, 105a to 105c by detecting the opening of the doors 4a, 105a to 105c for a certain time. If the door opening detection unit 100 tries to detect the opening of the doors 4a, 105a to 105c by, for example, a switch, it can be prevented that the door opening is detected by an instantaneous opening based on a malfunction due to a switch contact failure or the like. .

It is preferable that the power source of the door opening detection unit 100 in the door opening traveling prevention system according to the above embodiment is backed up by a storage battery when the power source is extinguished.
Thereby, even when the power supply of the door opening detection part 100 is interrupted, since it backs up with a storage battery, the operation | movement of the emergency stop apparatus 7 by a power failure can be prevented.

1 Door-opening travel prevention system for roll-up type elevators, 4 cars, 4a car doors, 7 emergency stop devices, 9 speed governors, 14 landing doors, 21 sheaves, 25 flyweights, 29 latch parts, 30 ratchets, 32 shoes , 54 actuators, 100 door open detector.

Claims (2)

A winding having an emergency stop device for emergency stop of the descent of the car, a governor rope connected to the car, a landing door provided at the landing where the car stops, and a car door provided in the car. In the trunk type elevator,
The sheave is rotated by the speed governor rope, and fly weight that spreads outward by the centrifugal force acting by this rotation. When the speed of the car exceeds a set value, the lowering of the car is stopped by the emergency stop device. Equipped with a governor,
The speed governor includes a ratchet that rotates with the sheave when the car descending speed reaches a preset overspeed;
A latch that engages the ratchet;
A shoe that brakes the governor rope when the ratchet is rotated;
A lever formed so as to be displaceable between a standby position and an engagement position where the flyweight is rotated to engage the latch portion with the ratchet;
An actuator connected to the lever to displace the lever;
A door opening detecting means for detecting at least one of the landing door and the opening of the car door, and operating the actuator based on the detection of the opening;
A power source that is supplied to the door opening detection means and backed up by a storage battery in the event of a power failure ,
Based on the operation of the actuator, the latch portion is engaged with the ratchet via the lever to operate the emergency stop device.
A roll-open type elevator door opening prevention system. The door open detection hand stage detects the opening by a predetermined time detecting the opening,
The door-open travel prevention system for a wind-cylinder elevator according to claim 1 .

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