JP2012006707A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device, which can reduce a lift abnormality of a car during door opening without depending on an encoder or arithmetic device and thus can improve the reliability.SOLUTION: When a solenoid coil 47 of a second governor 31 is electrified, a lift stop switch 45 is disposed in an operation avoiding position, and a switch lever 45a is thus never subjected to operation by an operation claw 38. When the solenoid coil 47 of the second governor 31 is not electrified, the lift stop switch 45 is disposed in an operable position, and the switch 45a is subjected to the operation by the operation claw 38 when fly weights 32A, 32B are rotated by centrifugal force by the rotation of a second sheave 24 corresponding to a door-opening predetermined speed. The lift stop switch 45 interrupts the power supply to a hoist in response to the operation of the switch lever 45a, and operates a brake device of the hoist.

Description

  The present invention relates to an elevator apparatus having a function of suppressing abnormal lifting of a car when the door is open.

  For example, in the conventional elevator apparatus as shown in Patent Document 1, when the car starts to move up and down at high speed due to a control runaway or the like with the car door or the landing door open (for example, the car goes up and down while being in the open state) When the car is moved up and down at a speed exceeding the running speed at the time of “floor correction operation”, a door-open running determination unit that suppresses the raising and lowering abnormality of the car is used. The door-opening travel determination unit determines the lift state of the car using a signal from an encoder or the like attached to the hoisting machine or the speed governor. Further, when the door-opening travel determination unit determines that an abnormality in raising and lowering the car has occurred, the door opening and running determination unit operates the brake device of the hoisting machine to stop the raising and lowering of the car.

International Publication No. 2009/008058 Pamphlet

  In the conventional elevator apparatus as described above, an arithmetic device having a function as a door-open travel determination unit determines the elevator state of the car using a signal from the encoder. However, there may be a problem with these encoders and arithmetic devices. Therefore, in order to further improve the reliability with respect to such a problem, there is a demand for a configuration that suppresses an abnormal raising / lowering of the car while the door is open without depending on an encoder or an arithmetic device.

  The present invention has been made to solve the above-described problems, and can suppress the raising / lowering abnormality of the car when the door is opened without depending on the encoder or the arithmetic unit, thereby improving the reliability. It aims at obtaining the elevator apparatus which can be performed.

  An elevator apparatus according to the present invention includes a car and a counterweight that are elevated in a hoistway, a main rope that suspends the car and the counterweight in the hoistway, and a sheave around which the main rope is wound. A driving device that drives the raising and lowering of the car and the counterweight, and a rotating body that can be rotated in accordance with the raising and lowering of the car, and a car door device provided in the car and a plurality of devices provided in the hoistway When at least one of the landing door devices is open, it is detected using the centrifugal force generated by the rotation of the rotating body that the traveling speed of the car has reached a predetermined speed. According to the circumstances, a door opening corresponding speed control mechanism for stopping the raising and lowering of the car is provided.

  According to the elevator device of the present invention, the door-opening governing mechanism detects that the traveling speed of the car has reached a predetermined speed using the centrifugal force due to the rotation of the rotating body, and in response to the detection, Since the raising / lowering of the car is stopped, it is possible to suppress the raising / lowering abnormality of the car while the door is opened without depending on the encoder or the arithmetic unit, and the reliability can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows the elevator apparatus by Embodiment 1 of this invention. It is a front view which shows the open state of the car door apparatus of FIG. It is a front view which shows the closed state of the car door apparatus of FIG. It is a front view which expands and shows the 2nd speed control apparatus of FIG. It is a front view which expands and shows the 2nd speed control apparatus of FIG. FIG. 6 is a circuit diagram showing a circuit configuration for feeding and shutting off the solenoid coil of FIGS. FIG. 6 is a circuit diagram showing a circuit configuration for feeding and shutting off the solenoid coil of FIGS.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a block diagram showing an elevator apparatus according to Embodiment 1 of the present invention.
In FIG. 1, a machine room 1a is provided in an upper part of a hoistway 1 of a building. The machine room 1 a is provided with a control panel 2, a hoisting machine 3 as a driving device, and a curling wheel 4. The hoisting machine 3 includes a motor, a sheave, and a brake device. The sheave is rotated by the driving force of the motor. A main rope 5 is wound around the sheave. The brake device allows the rotation of the sheave in the power supply state and stops the rotation of the sheave in the power supply cutoff state.

  The main rope 5 is suspended in the hoistway 1. A car 6 and a counterweight 7 are suspended from one end and the other end of the main rope 5, respectively. The car 6 and the counterweight 7 are moved up and down in the hoistway 1 by the driving force of the hoisting machine 3. Further, raising and lowering of the car 6 and the counterweight 7 including driving of the hoisting machine 3 are controlled by the control panel 2.

  Further, the raising and lowering of the car 6 and the counterweight 7 are guided by a car guide rail 8 and a weight guide rail 9 which are provided upright in the hoistway 1. In the vertical projection areas of the car 6 and the counterweight 7 at the bottom of the hoistway 1, shock absorbers 10 and 11 are provided, respectively.

  A car door device 13 including a car door panel 12 is provided on the front portion of the car 6. The entrance / exit of the car 6 is opened and closed by a car door panel 12. The car door device 13 drives the opening and closing movement of the car door panel 12. The driving of the car door device 13 is controlled by the control panel 2.

  The landings on each floor of the building are provided with landing door devices 15A to 15D including landing door panels 14A to 14D, respectively. The entrance / exit of the hall on each floor is opened and closed by hall door panels 14A to 14D. The landing door devices 15 </ b> A to 15 </ b> D each have an engagement mechanism (not shown) that can be engaged with the car door device 13. The landing door devices 15 </ b> A to 15 </ b> D receive an opening / closing driving force from the car door device 13 when the engagement mechanism is engaged with the car door device 13. The landing door panels 14 </ b> A to 14 </ b> D are opened and closed by the opening / closing driving force from the car door device 13.

  2 and 3, the car door device 13 includes a hanger case 16, a cam 17, and a car door open / close detection switch 18 as car door open / close detection means. The hanger case 16 accommodates a hanger mechanism for suspending the car door panel 12 so that it can be opened and closed. The cam 17 is attached to the upper surface of the car door panel 12.

  The car door open / close detection switch 18 is attached to the lower surface of the hanger case 16. The car door open / close detection switch 18 is a normally open contact type switch operated by a cam 17. The car door open / close detection switch 18 closes the contact of the car door open / close detection switch 18 when the car door panel 12 moves from the fully closed position to the open side. Similarly to the car door device 13, the landing door devices 15 </ b> A to 15 </ b> B are also provided with a hanger case and a cam (both not shown), and a landing door open / close detection switch (see FIGS. 6 and 7). Reference numerals 19A to 19D).

  In FIG. 1, an emergency stop device 20 is provided below the car 6. A speed regulating rope 22 is connected to the emergency stop device 20 via an emergency stop arm 21. The speed control rope 22 includes a first sheave (rotary body for normal operation) 23 provided in the machine room 1a, and a second sheave (rotary body for door opening) 24 provided at the bottom of the hoistway 1. It is stretched endlessly between. The speed adjusting rope 22 circulates between the first sheave 23 and the second sheave 24 as the car 6 moves up and down.

  The first sheave 23 is rotatably attached to a base 25 provided in the machine room 1a with a shaft 27 as a fulcrum. The second sheave 24 is rotatably attached to a base 26 provided at the bottom of the hoistway 1 with a shaft 27 as a fulcrum. Here, the first sheave 23 constitutes a part of the first speed governor 30 (regulator for normal operation) 30. Further, the second sheave 24 forms a part of a second speed governor 31 (door opening corresponding speed governing mechanism) 31.

  The first speed governor 30 can mechanically detect that the traveling speed of the car 6 has reached a predetermined speed corresponding to normal operation (for example, about 1.4 times the rated speed). Further, the first speed governor 30 activates the emergency stop device 20 via the speed governing rope 22 when detecting that the traveling speed of the car 6 has reached the predetermined speed for normal operation. The power supply to the machine 3 is cut off and the raising / lowering of the car 6 is stopped.

  Similar to the first speed governor 30, the second speed governor 31 can mechanically detect that the traveling speed of the car 6 has reached a predetermined speed corresponding to normal operation. The safety device 20 is actuated via the rope 22. Further, the second speed governor 31 can mechanically detect that the traveling speed of the car 6 has reached a predetermined speed corresponding to the door opening, and when this is detected, the power feeding to the hoisting machine 3 is cut off. , Stop raising / lowering the car 6. As an example of the predetermined speed corresponding to the door opening, there are a speed of 10 m / min and a speed of 20 m / min, and the predetermined speed corresponding to the door opening can be appropriately determined according to the installation environment and specifications of the elevator.

  Here, the specific configurations of the first speed control device 30 and the second speed control device 31 are substantially the same as each other, and the first speed control device 30 displaces the elevation stop switch 45 in the second speed control device 31. The first governor 30 and the second governor 31 are upside down with respect to each other, and the first governor 30 is connected to the hoistway 1. The main difference is that the second governor 31 is disposed at the top and disposed at the bottom of the hoistway 1. Below, it demonstrates centering around the structure of the 2nd governor 31, and the description about the structure of the 1st governor 30 is abbreviate | omitted.

  4 and 5 are enlarged front views of the second speed governor 31 shown in FIG. 4 and 5, the lower side of the base 26 is omitted. 4 and 5, the second speed adjusting device 31 includes a pair of flyweights (rotating members) 32A and 32B, pins 33A and 33B, a link 34, a ratchet 35, a latch 36, a balance spring 37, an operating claw (an operation portion). ) 38, connection lever 39, arm 40, shoe 41, spring shaft 42, a pair of spring receiving members 43A and 43B, a rope gripping spring 44, a lift stop switch 45, a plunger 46, a plunger biasing spring (not shown), and a solenoid A coil 47 is provided.

  The flyweights 32A and 32B are rotatably attached to the side surface of the second sheave 24 with pins 33A and 33B as fulcrums. The flyweights 32A and 32B are connected to each other by a link 34. The ratchet 35 is attached to the base 26 so as to be rotatable about the shaft 27 (coaxially with the second sheave 24). A plurality of teeth are provided on the outer periphery of the ratchet 35.

  The latch 36 is attached to one end portion (right end portion in FIG. 4) of the flyweight 32B, and engages with the teeth of the ratchet 35 when the flyweight 32B rotates counterclockwise in FIG. Further, one end of the flyweight 32B is connected to the side surface of the second sheave 24 via a balance spring 37 that opposes the centrifugal force caused by the rotation of the second sheave 24.

  The operating claw 38 is attached to the other end portion (left end portion in FIG. 4) of the flyweight 32B. Therefore, when the centrifugal force due to the rotation of the second sheave 24 exceeds the spring force of the balance spring 37, the flyweights 32A and 32B use the pins 33A and 33B as fulcrums, respectively, by the centrifugal force. It is turned toward the outside in the radial direction.

  One end of the connection lever 39 (the right end in FIG. 4) is pivotally connected to the side surface of the ratchet 35. One end of the arm 40 (upper end in FIG. 4) is connected to the base 26 so as to be rotatable. The shoe 41 is attached to the arm 40. Further, the shoe 41 is disposed in the vicinity of the outer peripheral surface of the second sheave 24.

  One end (the right end in FIG. 4) of the spring shaft 42 is connected to the other end (the left end in FIG. 4) of the connection lever 39. The spring receiving members 43A and 43B are attached to both ends of the spring shaft 42, respectively. The spring receiving member 43 </ b> A connects the other end portion of the arm 40 (the lower end portion in FIG. 4) and one end portion of the spring shaft 42. The rope gripping spring 44 is provided between the spring receiving members 43 </ b> A and 43 </ b> B on the spring shaft 42. The rope gripping spring 44 generates a spring force for pressing the shoe 41 against the speed adjusting rope 22.

  The solenoid coil 47 is attached to the base 26 via a fixture (not shown). A conductive wire 48 is connected to the solenoid coil 47, and the solenoid coil 47 is energized by being supplied with power through the conductive wire 48. The plunger 46 is inserted into the solenoid coil 47 so as to reciprocate.

  The plunger 46 is urged by a plunger urging spring so as to protrude toward the second sheave 24 side. Furthermore, the plunger 46 is attracted to the opposite side of the second sheave 24 by the magnetic force of the solenoid coil 47. The plunger 46, the plunger biasing spring, and the solenoid coil 47 constitute an actuator (solenoid).

  The raising / lowering stop switch 45 is attached to the tip end portion (left end portion in FIG. 4) of the plunger 46. Moreover, the elevation stop switch 45 has a switch lever 45a. Further, the lifting / lowering stop switch 45 is electrically connected to an electric circuit (not shown) between the hoisting machine 3 and its power source.

  Further, the lift stop switch 45 opens an electric circuit between the hoisting machine 3 and its power source in response to the operation (pressing) of the switch lever 45a. That is, the lift stop switch 45 cuts off the power supply to the hoisting machine 3 in response to the operation of the switch lever 45a. Further, the lifting / lowering stop switch 45 is displaced from one to the other by an actuator between an operable position where the switch lever 45a overlaps the moving range of the operating claw 38 and an operation avoidance position where the switch lever 45a is out of the moving range of the operating claw 38. Is done.

  That is, when the solenoid coil 47 is in the power supply cutoff state, as shown in FIG. 4, the elevation stop switch 45 is disposed at the operable position. In this state, the switch lever 45a is operated by the operating claw 38 when the flyweights 32A and 32B are rotated. On the other hand, in the power supply state of the solenoid coil 47, as shown in FIG. 5, the elevation stop switch 45 is disposed at the operation avoidance position. In this state, the switch lever 45a does not receive an operation by the operating claw 38 even if the flyweights 32A and 32B are rotated.

  Here, the centrifugal force due to the rotation of the second sheave 24 increases in proportion to the square of the rotation speed of the second sheave 24, and as the rotation speed increases, the flyweights 32A and 32B and the operation pawl 38 It spreads outward in the radial direction of the second sheave 24. Accordingly, when the traveling speed of the car 6 reaches a traveling speed exceeding the traveling speed at the time of the floor matching correction operation, the position of the lifting / lowering stop switch 45 and the operating claw 38 so that the operating claw 38 operates the switch lever 45a, The spring force of the balance spring 37 is adjusted in advance.

  Next, a circuit configuration for feeding and shutting off the solenoid coil 47 will be described. 6 and 7 are circuit diagrams showing a circuit configuration for feeding and shutting off the solenoid coil 47 of FIGS. 6 and 7, the solenoid coil 47 is connected to an electric circuit (electric circuit including the conductive wire 48) connecting the DC power source 50, the car door open / close detection switch 18, and the landing door open / close detection switches 19A to 19D in series.

  When the contact of at least one of the car door open / close detection switch 18 and the landing door open / close detection switches 19A to 19D is in an open state, as shown in FIG. The plunger 46 protrudes from the solenoid coil 47 by the biasing spring. Therefore, in this state, the elevation stop switch 45 is disposed at the operable position.

  On the other hand, when all the switch contacts of the car door open / close detection switch 18 and the landing door open / close detection switches 19A to 19D are in the closed state, the solenoid coil 47 is in the power supply state as shown in FIG. 46 is a state of being attracted by the solenoid coil 47. Therefore, in this state, the lift stop switch 45 is disposed at the operation avoidance position.

  Next, the operation of the second speed governor 31 when the car door device 13 and the landing door devices 15A to 15D are all closed will be described. When raising and lowering of the car 6 is started and the traveling speed of the car 6 reaches a predetermined speed corresponding to the normal operation, the flyweights 32A and 32B are caused to move to the second class by the centrifugal force caused by the rotation of the second sheave 24 corresponding to this speed. The vehicle 24 rotates outward in the radial direction. At this time, since the solenoid coil 47 is in the power supply state, the elevation stop switch 45 is disposed at the operation avoidance position, and the switch lever 45a is not subjected to the operation by the operation claw 38.

  Further, the fly weights 32 </ b> A and 32 </ b> B rotate toward the radially outer side of the second sheave 24, so that the latch 36 is engaged with the teeth of the ratchet 35. Then, the ratchet 35 is rotated together with the second sheave 24 in the counterclockwise direction of FIG. The rotation of the ratchet 35 is transmitted to the arm 40 via the connection lever 39, the spring shaft 42, and the spring receiving member 43A. As a result, the arm 40 is also rotated counterclockwise in FIG.

  The shoe 41 abuts against the speed adjusting rope 22 and the shoe 41 is pressed against the car speed adjusting rope 22 by the rope gripping spring 44. Thereby, the circular movement of the car speed adjusting rope 22 is stopped. Then, in the state where the circular movement of the car speed adjusting rope 22 is stopped, the car 6 moves up and down, whereby the emergency stop arm 21 is operated and the car emergency stop device 20 is operated. As a result, the raising / lowering of the car 6 is stopped instantaneously.

  Next, the operation of the second speed governor 31 when at least one of the car door device 13 and the landing door devices 15A to 15D is in the open state will be described. When the car 6 starts to move up and down and the traveling speed of the car 6 reaches a predetermined speed corresponding to the door opening, the flyweights 32A and 32B are moved to the second class by the centrifugal force generated by the rotation of the second sheave 24 corresponding to this speed. The vehicle 24 rotates outward in the radial direction.

  At this time, since the solenoid coil 47 is in a power supply cut-off state, the elevation stop switch 45 is disposed at the operable position, and the switch lever 45a is operated by the operating claw 38. And the raising / lowering stop switch 45 interrupts | blocks the electric power feeding to the hoisting machine 3 according to the switch lever 45a being operated, and operates the brake device of the hoisting machine 3. As a result, the raising / lowering of the car 6 is stopped instantaneously.

  The operation of the first speed governor 30 is substantially the same as the operation of the second speed governor 31 when the car door device 13 and the landing door devices 15A to 15D are all closed. In the first speed governor 30, when the traveling speed of the car 6 reaches a predetermined speed corresponding to normal operation, the lifting / lowering stop switch 45 cuts off the power supply to the hoisting machine 3 and operates the brake device of the hoisting machine 3. This is different from the second governor 31.

  According to the elevator apparatus of the first embodiment as described above, the second speed governor 31 detects that the traveling speed of the car 6 has reached the predetermined speed using the centrifugal force generated by the rotation of the second sheave 24. Then, the raising / lowering of the car 6 is stopped according to the detection. With this configuration, it is possible to suppress the lifting and lowering abnormality of the car 6 being opened without depending on the encoder or the arithmetic unit, and it is possible to improve the reliability.

  In addition, when the car door device 13 and the landing door devices 15A to 15D are all in the closed state, the actuator is arranged with the elevator stop switch 45 at the operation avoidance position, and at least the car door device 13 and the landing door devices 15A to 15D are arranged. When any one is in the open state, the elevation stop switch 45 is arranged at the operable position. With this configuration, since the elevator stop switch 45 is disposed at the operation avoidance position during the normal operation of the car 6, it is possible to avoid erroneous detection of the car 6 raising / lowering abnormality.

  Further, the first speed governor 30 is disposed at the upper part of the hoistway 1, the second speed governor 31 is disposed at the bottom of the hoistway 1, and the first sheave 23 and the second sheave 24 are speed control ropes. It is comprised so that it may mutually synchronize and rotate with 22 circulation movement. With this configuration, the installation space for the second speed governor 31 can be minimized.

  In the first embodiment, two speed control devices, the first speed control device 30 and the second speed control device 31, are used. However, the present invention is not limited to this example, and the first speed governor 30 may be omitted and only the second speed governor 31 may be used. Here, a second lifting / lowering stop switch (a switch that is not displaced by the actuator) is overlapped with the movement range of the operating pawl 38 when the centrifugal force is generated by the rotation of the second sheave 24 corresponding to the predetermined speed corresponding to the normal operation. ) In the second speed governor 31, the function of the first speed governor 30 can be merged with the second speed governor 31.

  Further, in the first embodiment, the second governor 31 has a structure for detecting that the traveling speed of the car 6 has reached the predetermined speed corresponding to the normal operation. However, the present invention is not limited to this example, and the structure for detecting that the traveling speed of the car 6 has reached the predetermined speed for normal operation may be omitted from the second governor 31. That is, the ratchet 35, the latch 36, the connection lever 39, the arm 40, the shoe 41, the spring shaft 42, the spring receiving members 43A and 43B, and the rope gripping spring 44 may be omitted from the second governor 31.

  1 hoistway, 3 hoisting machine (drive device), 5 main rope, 6 car, 7 counterweight, 13 car door device, 15A-15D landing door device, 18 car door open / close detection switch (car door open / close detection means), 19A-19D landing door open / close detection switch, 20 emergency stop device, 22 speed control rope, 23 1st sheave (rotary body for normal operation), 24 2nd sheave (rotary body for door opening), 30 1st tone Speed control device (regulation mechanism for normal operation), 31 second speed control device (control mechanism for door opening), 32A, 32B flyweight (rotating member), 38 operating claw (operation part), 45 lift stop switch, 46 Plunger, 47 Solenoid coil.

Claims (5)

A car and a counterweight that are raised and lowered in the hoistway;
A main rope for suspending the car and the counterweight in the hoistway;
A driving device having a sheave around which the main rope is wound, and driving the raising and lowering of the car and the counterweight;
A rotating body that can rotate as the car is raised and lowered, and at least one of the car door device provided in the car and the plurality of landing door devices provided in the hoistway is in an open state. In this case, it is detected that the traveling speed of the car has reached a predetermined speed by using a centrifugal force generated by the rotation of the rotating body, and in response to the detection, the door opening corresponding adjustment is performed to stop the raising and lowering of the car. An elevator apparatus comprising: a speed mechanism. The door opening corresponding speed control mechanism is:
A rotating member that is provided on the rotating body and is rotatable outward in the radial direction of the rotating body by a centrifugal force generated by the rotation of the rotating body;
An operation unit provided on the rotating member;
An elevator stop switch that is operated by the operation unit and stops raising and lowering the car in response to the operation;
Detecting that the traveling speed of the car has reached a predetermined speed by rotating the rotating member by the centrifugal force generated by the rotation of the rotating body and operating the lift stop switch by the operation unit. The elevator apparatus according to claim 1. The door-opening governing mechanism further includes an actuator for displacing the lifting / lowering stop switch from one of an operable position that overlaps the movement range of the operation unit and an operation avoidance position outside the movement range of the operation unit. And
The actuator is
Connected to a car door open / close detecting means for detecting the open / closed state of the car door device, and a plurality of landing door open / close detecting means for detecting the open / closed state of each of the plurality of landing door devices,
In response to at least one of the car door opening / closing detection means and the plurality of landing door opening / closing detection means detecting an open state of the door device, the lift stop switch is disposed at the operable position,
The elevator stop switch is disposed at the operation avoidance position in response to all of the car door opening / closing detection means and the plurality of landing door opening / closing detection means detecting a closed state of the door device. The elevator apparatus according to 2. An emergency stop device provided on the car for stopping the raising and lowering of the car;
It has a rotating body for normal operation that can rotate as the car moves up and down, and is provided at either the top or bottom of the hoistway, and is different from the predetermined speed corresponding to the door opening as the predetermined speed. Detecting that the traveling speed of the car has reached a predetermined speed using the centrifugal force generated by the rotation of the rotating body for normal operation, and controlling the normal operation corresponding to operating the emergency stop device in response to the detection A mechanism and
The door opening corresponding speed control mechanism has a door opening corresponding rotating body as the rotating body, and is provided on the other of the upper part and the bottom part of the hoistway,
A speed-control rope connected to the car is wrapped around the door-opening rotating body and the normal operation-supporting rotating body,
The elevator apparatus according to any one of claims 1 to 3, wherein the door opening corresponding rotating body and the normal operation corresponding rotating body rotate in synchronization with each other by the speed control rope. . The elevator apparatus according to any one of claims 1 to 4, wherein the predetermined speed is a speed that exceeds a traveling speed of the car floor matching correction operation.

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