JP2011143978A - Door open-travel protective device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door open-travel protective device in which a motor need not be renewed when the door open-travel protective device is compulsory by the amendment of the Building Standard Law. <P>SOLUTION: The door open-travel protective device for the duplex operation of a brake without changing an existing motor for turning a drive sheave includes a disk brake mounted to a spindle of the motor, and a control device for giving an operation command to the disk brake when a door of a moving elevator car is opened. The disk brake includes a coupling for coupling the brake disk to the spindle of the motor. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a door-opening travel protection device that prevents a car from traveling while an elevator car door is open.

  The elevator hoisting machine includes a motor, a brake device, and an emergency brake device, and controls (turns up and down) and stops the car by controlling the rotation of the driving sheave around which the main rope is wound. Further, while the car stops at the landing and the user gets on and off the car, the car is supported at the regular landing position by the stop holding force of the brake device. On the other hand, the emergency brake device is provided separately from the brake device in order to prevent door-opening travel, and operates to stop the rotation of the main shaft of the motor when door-open travel is detected. . This emergency brake device is provided at one end of a motor. For example, a brake disk that rotates in conjunction with a main shaft, and a brake that presses the brake disk in response to an operation command to generate a predetermined braking force. Consists of calipers. The brake caliper normally holds the pad with a predetermined gap from the brake disc by an urging force such as a spring, and when an operation command is input, the coil is excited to press the pad against the brake disc. Then, a braking force is generated (see, for example, Patent Document 1).

JP 2008-280104 A

However, since the brake disc of the emergency brake device is fixed to the main shaft of the motor, the emergency brake device can be installed if the main shaft of the new motor is lengthened so that the length of the main shaft can be fixed to the brake disc. However, the existing motor has a problem that the main shaft cannot afford to fix the brake disc, and when the brake is duplicated, the motor itself must be replaced, which increases the cost.
There is also a proposal for dual disk brakes, but the timing for stopping is the same, and if a failure occurs in the brake circuit, there is a possibility that braking will not work.

  The present invention has been made to solve the above-described problems, and when the door opening travel protection device is obligated by the amendment of the Building Standards Act, it is not necessary to replace the motor with a new one. An object of the present invention is to provide a door opening travel protection device.

  The door opening travel protection device according to the present invention is a door opening travel protection device that doubles a brake without replacing an existing motor that rotates a driving sheave, a disc brake that is attached to the main shaft of the motor, and a movement And a control device for issuing an operation command to the disc brake when the elevator car door is open, the disc brake including a coupling for connecting the brake disc to the main shaft of the motor.

  In the door opening travel protection device according to the present invention, since the disc brake is attached to the main shaft of the existing motor via the coupling, the brake can be duplicated without newly replacing the motor. Even if the brakes are doubled, even if the shoes of the brake device are worn or the lubricating oil adheres to the brake drum, the predetermined stop holding force cannot be obtained. In response to the occurrence of the door-opening running, the emergency stop can be performed by the disc brake, and the safety can be further improved.

It is a front view which shows the elevator by which the door opening travel protection apparatus which concerns on Embodiment 1 of this invention was arrange | positioned. It is a side view which shows the hoisting machine of an elevator. It is principal part sectional drawing which shows a coupling. It is a functional block diagram of a control device. It is a flowchart which shows operation | movement of the door opening travel protection apparatus which concerns on Embodiment 1 of this invention.

Hereinafter, a preferred embodiment of a door opening travel protection device of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a front view showing an elevator provided with a door-open travel protection device according to Embodiment 1 of the present invention. FIG. 2 is a side view showing an elevator hoist. FIG. 3 is a cross-sectional view of the main part showing the coupling. FIG. 4 is a functional block diagram of the control device.

As shown in FIG. 1, the elevator according to the present invention is provided in a car 1 and a car 1 that move up and down in the elevator hoistway, and opens and closes a car door 2 and a car door 2 that opens and closes an entrance formed in the car 1. The door driving device 3 to be driven, the door closing detection switch 4 provided in the car 1, the counterweight 5 that moves up and down in the hoistway in the opposite direction to the car 1, and the car 1 and the counterweight 5 are suspended in a fishing bottle type. A rope 6 and a hoisting machine 7 that is installed in an elevator machine room or the like and drives the car 1 via the main rope 6 are provided.
The door closing detection switch 4 is biased by a cam (not shown) and outputs a door closing signal when the car door 2 is in a predetermined fully closed state.

The hoisting machine 7 includes a driving sheave 8, a motor 9, and a brake device 10. Then, by controlling the rotation of the driving sheave 8 around which the main rope 6 is wound by the motor 9, the car 1 is run (lifted / lowered) and stopped.
Further, while the car 1 stops at the landing and the user gets on and off the car 1, the car 1 is supported at the regular landing position by the stop holding force of the brake device 10.
Further, when the brake device 10 starts to operate, an operation start signal is issued from the brake device 10.

  When the car stops at the normal landing position, that is, when the user gets on and off the elevator car, the stop holding force of the car depends on the urging force of the spring provided in the brake device 10. For this reason, when the car at the time of stopping is supported only by the urging force of the spring, etc., if any trouble occurs in the brake device 10, the car remains in the state where the elevator door is opened. May rise or fall. Therefore, at this time, the car is stopped by the second brake means so that the car does not rise or fall. This second brake means is a door opening travel protection device.

  The door opening travel protection device according to Embodiment 1 of the present invention includes a disc brake 11, a bracket 12 that supports the disc brake 11, and a control device 13 that controls the disc brake 11.

The disc brake 11 includes an extension shaft 14, a brake disc 15 fixed to the extension shaft 14, a coupling 16 that connects the brake disc 15 to the main shaft 9a, an armature 17 that contacts the brake disc 15 and stops the rotation of the brake disc 15. A spring 18 that biases the armature 17 and a disk coil 19 that attracts the armature 17 are provided.
The coupling 16 couples the flange 21 fixed to the main shaft 9 a of the motor 9, the key 22 for fixing the flange 21 to the main shaft 9 a, the bearing washer 23 and the bearing nut 24, and the flange 21 and the brake disc 15. A reamer bolt 25 and a nut 26, a key 27 for fixing the extension shaft 14 to the brake disk 15, a bearing washer 28 and a bearing nut 29 are provided.

Next, a procedure for attaching the disc brake 11 and the bracket 12 to the existing motor 9 will be described.
Since the disc brake 11 is attached to the end of the main shaft 9a of the motor 9 opposite to the drive sheave 8, the encoder 31 attached to the end is removed.
Next, the center hole 21a of the flange 21 is inserted into the end portion of the main shaft 9a, and the key 22 is press-fitted into the gap between the main shaft 9a and the flange 21 to fix the flange 21 to the main shaft 9a.
Next, a bearing washer 23 is attached to the end surface of the main shaft 9a with a bearing nut 24 and fixed so that the flange 21 does not come off the main shaft 9a.
Next, the brake disc 15 is inserted into the end of the extension shaft 14, and a key 27 is press-fitted into the gap between the extension shaft 14 and the brake disc 15 to fix the brake disc 15 to the extension shaft 14.
Next, a bearing washer 28 is attached to the end face of the extension shaft 14 with a bearing nut 29 and fixed so that the extension shaft 14 does not come off the brake disc 15.
The encoder 31 is fixed to the other end surface of the extension shaft 14.

The disc brake 11 is fixed to the bracket 12, and the bracket 12 is fixed to the machine beam 32.
Then, the brake disc 15 of the disc brake 11 is fixed to the flange 21 using a reamer bolt 25 and a nut 26.
Finally, the electric wire from the disk coil 19 is connected to the control device 13.

  The disc brake 11 is provided separately from the brake device 10 in order to prevent the door from opening, and operates to stop the rotation of the main shaft 9a of the motor 9 when door opening is detected. .

Next, the configuration of the control device 13 that governs overall control of the door opening travel protection device according to Embodiment 1 of the present invention will be specifically described.
The control device 13 includes a car movement presence / absence determination unit 40, a travel control unit 41, a travel command presence / absence determination unit 42, a door open detection unit 43, and a disc brake control unit 44.
The car movement presence / absence determination unit 40 is a means for determining whether or not the car 1 is moving. The car movement presence / absence determination unit 40 detects the car movement amount based on, for example, a pulse output from the encoder 31 that detects the rotation angle of the main shaft 9a, and the car movement amount exceeds a predetermined reference value within a predetermined unit time. Is detected, it is determined that the car has moved.

The travel control unit 41 is a means for outputting a travel command for causing the car 1 to travel based on a registered car call or the like. That is, in the hoisting machine 7, the motor 9 is driven by the travel command from the travel control unit 41 to cause the car 1 to travel.
The travel command presence / absence determination unit 42 is a means for determining whether or not a travel command is output from the travel control unit 41. That is, when a travel command is output from the travel control unit 41 to the hoisting machine 7, it is determined that there is a travel command.
The door opening detection unit 43 is a means for determining whether the car door 2 is in a predetermined door opening state. For example, when the door closing signal is not input from the door closing detection switch 4, the door opening state is detected. Determine.

  The disc brake control unit 44 is a means for operating the disc brake 11 under a predetermined condition. Based on this, when door-open running is detected, an operation command is output and the disc brake 11 is operated.

Next, the operation of the door opening travel protection device according to Embodiment 1 of the present invention will be described. FIG. 5 is a flowchart showing the operation of the door-open travel protection device according to Embodiment 1 of the present invention.
During normal operation of the elevator, in step S1, it is determined whether or not there is a car movement. When it is determined that the car is moving, the process proceeds to step S2, and when it is determined that there is no car movement, the process returns to step S1.
In step S2, it is determined whether or not there is a travel command. When it is determined that there is no travel command, the process proceeds to step S3. When it is determined that there is a travel command, the process returns to step S1.
In step S3, the door open state is determined. When it is determined that the door is open, the process proceeds to step S4. When it is determined that the door is closed, the process returns to step S1.

In step S4, it is determined whether or not the brake device 10 has operated and a predetermined time or more has elapsed. When it is determined that the predetermined time or more has elapsed, the process proceeds to step S5. repeat.
In step S5, an operation command is output to the disc brake 11.
In step S6, the disc brake 11 is operated according to the operation command, and the rotation of the main shaft 9a of the motor 9 is stopped.

  In the door opening travel protection device according to the first embodiment of the present invention, the disc brake 11 is attached to the main shaft 9a of the existing motor 9 via the coupling 16, so that the brake can be doubled without newly replacing the motor 9. Can fulfill. Then, due to the duplication of the brake, if the shoe of the brake device 10 is worn or the lubricant oil adheres to the brake drum, etc., a predetermined stop holding force cannot be obtained. However, the emergency stop can be performed by the disc brake in response to the occurrence of the door-open running, and the safety can be further improved.

  In addition, since the disc brake 11 is operated at a timing different from the operation timing of the brake device 10 by the control device 13 different from the device that controls the brake device 10, a failure occurs in the brake device 10 independently of the brake device 10. Only when the disc brake 11 is operated, the brake can be reliably braked.

  Further, since the disc brake 11 is fixed to the machine beam 32 by the bracket 12, the motor 9 or the like is not required to be modified and the construction is simple.

  1 car, 2 (car) door, 3 door drive, 4 door close detection switch, 5 counterweight, 6 main rope, 7 hoist, 8 drive sheave, 9 motor, 9a (motor) main shaft, 10 Brake device, 11 disc brake, 12 bracket, 13 control device, 14 extension shaft, 15 brake disc, 16 coupling, 17 armature, 18 spring, 19 disc coil, 21 flange, 21a (flange) center hole, 22 key, 23 bearing washer, 24 bearing nut, 25 reamer bolt, 26 nut, 27 key, 28 bearing washer, 29 bearing nut, 31 encoder, 32 machine beam, 40 movement presence / absence judging unit, 41 travel control unit, 42 travel command Presence / absence determination unit, 43 door open detection unit, 44 disc brake control unit.

Claims (3)

In the door opening travel protection device that doubles the brake without replacing the existing motor that rotates the driving sheave that raises and lowers the elevator car,
A disc brake attached to the spindle of the motor;
A control device for issuing an operation command to the disc brake when the moving elevator car door is open,
The door opening travel protection device, wherein the disc brake includes a coupling for connecting the brake disc to the main shaft of the motor.   The door opening travel protection device according to claim 1, wherein the coupling includes a flange that connects a brake disc of the disc brake to a main shaft of the motor.   3. The door opening travel protection device according to claim 1, wherein the control device issues an operation command to the disc brake after a predetermined time has elapsed since the operation of the elevator brake device.

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