WO2005105649A1

WO2005105649A1 - Abnormal-state braking system of elevator

Info

Publication number: WO2005105649A1
Application number: PCT/JP2004/006325
Authority: WO
Inventors: Satoru Kato
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2004-04-30
Filing date: 2004-04-30
Publication date: 2005-11-10
Also published as: EP1780160A4; EP2258650B1; EP1780160A1; EP1780160B1; EP2258650A3; CN1802306A; CN100443392C; EP2258650A2; JPWO2005105649A1; JP4566994B2

Abstract

An abnormal-state braking system of an elevator, wherein an over-speed set level set to be reduced starting near the termination part of a hoistway toward the termination part is stored in a control device according to the position of a car. When the detected speed of the car exceeds the over-speed set level at the position of the car detected by an encoder, operation signals are outputted from the control device. The operation signals are inputted into a brake device or an emergency stop device for operation to urgently brake the car. A display for indicating the position of the car obtained by using information from the encoder and the value of the over-speed set level at the position of the car is electrically connected to the control device.

Description

Abnormal braking system for elevator

Technical field

The present invention relates to an elevator abnormal braking system that brakes a car when the speed of the car becomes abnormal. Background art

Conventionally, Japanese Patent Application Laid-Open No. 8-324709 proposes a method of operating a governor by rotating a governor sheave with a governor rope floating from a governor sheave as an operation test method of an elevator governor. In this method, an electric drill is pressed against a governor sheep, and the governor sheep is rotated by the rotating force of the electric drill. A tachometer is pressed against the governor sieve, and the speed of governor sheave is measured. In this way, the governor is forcibly operated, and the speed of the governor sheep when the governor is operated is checked with a tachometer.

Also, in response to recent demands for space-saving elevators, Japanese Patent Application Laid-Open No. 2001-3544732 discloses that the speed of a car for operating an emergency stop device is set near the end of a hoistway. An elevator system is shown in which the braking distance at the time of the emergency stop operation is reduced near the end of the hoistway by continuously reducing the distance. This makes it possible to reduce the length of the hoistway in the height direction. In this elevator system, since the speed of the car when the safety gear operates is different depending on the position of the car, it is necessary to conduct a governor operation test while changing the position of the car.

However, in the above method of rotating the governor sheave with an electric drill, only the rotational speed of the governor sheave is measured, so the position of the car must be checked every time the position of the car is changed. Takes time and effort. Disclosure of the invention

The present invention has been made to solve the above problems, 2004/006325 An object of the present invention is to provide an elevator abnormal braking system that can easily and accurately perform an operation test of a braking unit for braking.

An abnormal braking system for an elevator according to the present invention includes: a detecting unit that detects a position and a speed of a car; an overspeed setting that is set so as to decrease toward a terminal end in a predetermined section adjacent to the terminal end of the hoistway. A control unit that has a storage unit that stores the level, and outputs an operation signal when the detected speed of the car exceeds the overspeed set level at the detected position of the car obtained from the information from the detection unit. A brake unit for braking the car and a display unit for displaying a detected position and an overspeed setting level at the detected position based on information from the control unit. Brief Description of Drawings

FIG. 1 is a configuration diagram schematically showing an elevator apparatus according to Embodiment 1 of the present invention, FIG. 2 is a block diagram showing a control device of FIG. 1,

FIG. 3 is a graph showing a criterion for judging a car speed abnormality stored in the storage unit of FIG. 2, FIG.

FIG. 5 is a perspective view showing a connecting portion of the safety device of FIG. 4,

FIG. 6 is a configuration diagram showing the rope catching device of FIG. 1,

FIG. 7 is a sectional view showing the electromagnetic actuator of FIG. 6,

FIG. 8 is a block diagram showing a control device of an abnormal braking system for an elevator according to Embodiment 2 of the present invention.

FIG. 9 is an explanatory diagram showing a control method of a control device of an abnormal braking system of an elevator according to Embodiment 3 of the present invention.

FIG. 10 is a configuration diagram showing a rope catch device of an abnormal braking system for an elevator according to Embodiment 5 of the present invention.

FIG. 11 is a configuration diagram showing a rope catch device of an abnormal braking system for an elevator according to Embodiment 6 of the present invention,

FIG. 12 is a configuration diagram showing a rope catching device of an abnormal braking system for an elevator according to a seventh embodiment of the present invention.

FIG. 13 is a configuration diagram showing a state in which the rope catching device of FIG. 12 is operated, FIG. 14 is a front view showing a rope catch device of an emergency braking system for an elevator according to an eighth embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1

FIG. 1 is a configuration diagram schematically showing an elevator apparatus according to Embodiment 1 of the present invention. In the figure, a pair of car guide rails 2 are installed in a hoistway 1. The car 3 is guided up and down the hoistway 1 by the car guide rails 2. At the upper end of the hoistway 1, a hoisting machine 4, which is a driving device for raising and lowering the car 3 and the counterweight 6, is arranged. A main rope 5 is wound around a drive sheep 4 a of the hoisting machine 4. The car 3 and the counterweight 6 are suspended in the hoistway 1 by the main rope 5. The hoisting machine 4 is provided with a brake device (not shown) that is a braking unit that brakes the rotation of the drive sheave 4a.

The car 3 is provided with an emergency stop device (braking unit) 7 for braking the car 3 against the car guide rail 2 so as to face the car guide rail 2. The emergency stop device 7 is arranged below the car 3. The car 3 is subjected to emergency braking by the operation of the emergency stop device 7.

At the upper end of the hoistway 1, a rotatable governor sheave 8 is provided. The governor sheave 8 is wound with a governor rope 9 which moves in synchronization with the elevation of the car 3. Both ends of the governor rope 9 are connected to the safety device 7. At the lower end of the hoistway 1, a tension sheave 10 around which a governor rope 9 is wound is provided.

The governor 8 is provided with an encoder 11 which is a detection unit for detecting the position and speed of the car 3. In the hoistway 1, an abnormal braking system control device 12 (hereinafter simply referred to as a "control device 12"), which is a control unit for controlling the operation of the abnormal braking system of the elevator, is provided. . The encoder 11 is electrically connected to the control device 12. In the control device 12, the position and the speed of the car 3 are obtained based on the measurement signal obtained from the encoder 11. In this example, In the control device 12, the position of the car 3 is obtained based on the measurement signal from the encoder 11, and the speed of the car 3 is obtained by differentiating the position of the car 3. The control device 12 outputs an operation signal that is an electric signal when the speed of the car 3 becomes abnormal.

The control device 12 includes a processing unit (combiner) 13 for determining whether or not there is an abnormality in the speed of the car 3, a measurement signal from the encoder 11, and an output of a calculation result by the processing unit 13. It has an IZO port 14 as an input / output unit. In the control device 12, when the processing unit 13 determines that the speed of the car 3 is abnormal, an operation signal, which is an electric signal, is output from the I / O port 14. In the vicinity of the governor sheave 8, a rope catching device (rope restraining device) 15, which is a braking unit for restraining the governor rope 9, is provided. In addition, a capacitor (not shown) is electrically connected to the rope catching device 15. A charge for supplying the operating power of the rope catching device 15 is stored in the capacitor in advance.

The control device 12 selectively outputs an operation signal to the brake device and the rope catch device 15 of the hoisting machine 4. The power supply to the brake device of the hoisting machine 4 is stopped by the input of an operation signal from the control device 12, and the brake device is operated. The drive sheave 4a is braked by the operation of the brake device. The rope catching device 15 is operated by supplying operating power from a capacitor in response to an input of an operating signal from the control device 12. The governor rope 9 is restrained by the operation of the rope catching device 15.

FIG. 2 is a block diagram showing the control device 12 of FIG. In the figure, the measurement signal from the encoder 11 is always input to the I / O port 14 as the position information 71 and the speed information 72 of the car 3. Further, from the I / O port 14, it is possible to selectively output the operation signal 73 to the brake device of the hoisting machine 4 and the operation signal 74 to the rope catching device 15. Further, the I / O port 14 is electrically connected to a display 75 which is a display unit for displaying a specific calculation result from the processing unit 13.

The processing unit 13 is a car speed serving as a reference for detecting whether the speed of the car 3 is abnormal. A storage unit (memory) preliminarily storing the degree abnormality judgment criteria (setting data), and a calculation unit that detects the presence or absence of an abnormality in the speed of the car 3 based on the information of the encoder and the storage unit. (CPU) 77. The storage unit 76 has a ROM 78 and a RAM 79. The car speed abnormality judgment criteria are stored in ROM 78.

FIG. 3 is a graph showing a car speed abnormality determination criterion stored in the storage unit 13 of FIG. In the figure, a hoistway 1 is provided with a hoisting section in which a car 3 moves up and down between a top floor (one end) and a lowest floor (the other end). In the ascending / descending section, the car 3 is adjacent to each of the top floor and the lowest floor, and the car 3 is accelerated and decelerated during normal operation. There is a constant speed section that moves at a speed (rated speed).

In the car speed abnormality judgment criterion, three set levels for judging the abnormal level of the speed of the car 3 are set corresponding to the position of the car 3. In other words, the car speed abnormality judgment criteria include the normal speed setting level (normal speed pattern) 17 as the speed of the car 3 during normal operation, and the first overrun set to a value larger than the normal speed setting level 17. Speed setting level (1st overspeed pattern) 1 8 and 2nd overspeed setting level (2nd overspeed pattern) 1 9 which is larger than 1st overspeed setting level 18 Are set corresponding to the position of.

The normal speed setting level 17, the first overspeed setting level 18 and the second overspeed setting level 19 are set so that they become constant values in the constant speed section, and the top and bottom floors in the acceleration / deceleration section. Are set so as to decrease continuously toward. The first overspeed setting level 18 and the second overspeed setting level 19 are set to be smaller than the rated speed of the car 3 on the side near the end of the acceleration / deceleration section. .

That is, the normal speed setting level 17, the first overspeed setting level 18, and the second overspeed setting level 19 are stored in the storage unit 76 corresponding to the position of car 3 as a car speed abnormality judgment reference. Have been.

When the speed of the obtained car 3 exceeds the first overspeed setting level 18, the calculating section 77 outputs an operation signal 73 to the brake device of the hoisting machine 4, and the speed of the car 3 becomes the second speed. When the overspeed setting level 19 is exceeded, the operation signal 7 4 is sent to the rope catching device 15. Output. The output of the operation signal 73 to the brake device of the hoisting machine 4 is maintained even when the operation signal 74 is output. When the operation of the rope catching device 15 is canceled to return to the normal state, the calculating unit 77 outputs a return signal, which is an electric signal, to the rope catching device 15. The rope catching device 15 is restored by receiving the return power from the capacitor in response to the input of the restoration signal.

The display 75 shows the detection position of car 3 obtained from the information from the encoder 11, the value of the first overspeed setting level 18 at the detection position of car 3, and the second overspeed at the detection position of car 3. The value of speed setting level 19 is displayed.

FIG. 4 is a front view showing the safety gear 7 of FIG. FIG. 5 is a perspective view showing a connection portion of the emergency stop device 7 of FIG. In the figure, each safety device 7 displaces a wedge 20 with respect to the car 3 by a displacement of the car 3 with respect to the governor rope 9 and a wedge 20 as a braking member that can be brought into contact with and separated from the car guide rail 2. It has a rotating lever 21 serving as a link mechanism, and a hand 22 serving as a guide for guiding a wedge 20 displaced by the rotating lever 21 in a direction contacting the car guide rail 2. Each wedge 20 is located below the collar 22. A friction material 23 that comes into contact with the car guide rail 2 is attached to each wedge 20. At the lower end of each wedge 20, a mounting portion 24 extending downward from the wedge 20 is fixed.

At the lower end of the car 3, a horizontally extending connection shaft 25 is rotatably provided. One end of each rotating lever 21 is fixed to both ends of the connecting shaft 25 (FIG. 5). The other end of each rotating lever 21 is provided with an elongated hole 26 extending in the longitudinal direction of the rotating lever 21. Each rotating lever 21 is provided at the lower end of the car 3 so that the elongated hole 26 is arranged below the grip 22. Each mounting portion 24 is slidably mounted in each elongated hole 26.

A pull-up rod 27 to which both ends of the governor rope 9 are connected is rotatably connected to the -rotating lever 21 (FIGS. 4 and 5). The pulling bar 27 extends vertically. Each of the rotating levers 21 is configured to be rotated about the axis of the connecting shaft 25 by the displacement of the pulling rod 27 with respect to the car 3. Each wedge 20 is different from the rotating lever 21 When the end is turned upward, the end is displaced in a direction approaching the ring 22.

The holding ring 22 is arranged in a recess 29 provided at the lower end of the car 3. The gripper 22 has a sliding member 30 and a pressing member 31 arranged so as to sandwich the car guide rail 2. The slide member 30 and the pressing member 31 are supported by a support member 32 fixed in the recess 29. The slide member 30 is provided with an inclined portion 33 for holding the wedge 2 ° so as to be slidable. The inclined portion 33 is inclined with respect to the car guide rail 2 such that the distance from the car guide rail 2 becomes smaller upward. The slide member 30 is fixed to the support member 32.

The pressing member 31 is supported by the support member 32 via a support spring 34 which is an elastic body. A friction member 35 that comes into contact with the car guide rail 2 is attached to the pressing member 31.

The wedge 20 is displaced in a direction in contact with the car guide rail 2 by being slid upward along the inclined portion 33, so that the wedge 20 is pushed between the car guide rail 2 and the slide member 30. I have. The car 3 is displaced leftward in the figure with respect to the car guide rail 2 by pushing the wedge 20 between the car guide rail 2 and the slide member 30. As a result, the wedge 20 and the pressing member 31 are displaced toward each other so as to sandwich the car guide rail 2. When the wedge 20 and the pressing member 31 are pressed against the car guide Reynole 2, a braking force against the car 3 is generated.

At the lower end of the car 3, a twist spring (not shown) for urging the connecting shaft 25 in a direction in which each wedge 20 is displaced downward is provided. Thereby, malfunction of each emergency stop device 7 is prevented. At the lower end of the car 3 is fixed a stopper 36 for restricting the pivoting lever 21 from pivoting downward. This prevents the wedge 20 from coming off from the inclined portion 33.

FIG. 6 is a configuration diagram showing the rope catching device 15 of FIG. In the figure, a rope catching device 15 is supported by a frame 41 provided with a governor sheave 8. In addition, the rope catching device 15 is a pushing portion that is displaceable between a restraining position for restraining the governor rope 9 and an open position for releasing the restraining of the governor rope 9. The coupling shoe 42, the electromagnetic actuator 43 that generates a driving force to displace the shirring shell 42 between the restrained position and the release position, the electromagnetic actuator 43, and the pressing shell 42 are connected. And a coupling mechanism 44 for pressing the driving force of the electromagnetic actuator 43 and transmitting the driving force to the shoe 42.

An attachment member 45 to which the electromagnetic actuator 43 is attached is fixed on the frame body 41. The mounting member 45 has a horizontal portion 46 on which the electromagnetic actuator 43 is placed, and a vertical portion 47 extending upward from an end of the horizontal portion 46.

The pressing shoe 42 is a friction material having a contact surface facing the outer periphery of the governor sheave 8. The pressing shoe 42 is pressed against the governor sheave 8 via the governor rope 9 when in the restraining position, and is separated from the governor rope 9 when in the open position.

The electromagnetic actuator 43 is actuated by the input of an actuation signal 74 from the control device 12 to displace the pressing shoe 42 to the restrained position. Further, the electromagnetic actuator 43 is returned by the input of a return signal from the control device 12 to displace the pressing shoe 42 to the open position.

The coupling mechanism section 44 is provided with a movable rod 48 reciprocated by the drive of the electromagnetic actuator 43 and a pressing shoe 42, and between the restrained position and the open position by reciprocating the movable opening 48. And a displacement lever 49 for displacing the pressing shoe 42 with.

One end (lower end) of the displacement lever 49 is rotatably attached to the frame 41, and the other end (upper end) of the displacement lever 49 is slidably attached to the movable rod 48. ing. Further, the pressing shoe 42 is rotatably attached to an intermediate portion of the displacement lever 49. The displacement lever 49 is rotated in the direction in which the pushing rod 42 is displaced to the open position by the advance of the movable rod 48, and the pushing rod 42 is moved to the restraining position by the retreat of the movable mouth 48. It is turned in the direction of displacement.

The movable rod 48 extends horizontally from the electromagnetic actuator 43 and penetrates vertically through the vertical portion 47. Further, a first spring connection portion 51 is fixed to a distal end portion of the movable rod 48. Upper end of displacement lever 49 and first spring connection 5 1 A pressing spring 52 which is an elastic body for pressing the pressing shoe 42 at the time of the restraining position against the governor sheave 8 is connected between them.

A second spring connection portion 53 is fixed to a portion of the movable port 48 between the electromagnetic actuator 43 and the vertical portion 47. Between the vertical portion 47 and the second spring connection portion 53, an adjustment spring 54, which is an elastic body for reducing the load on the electromagnetic actuator 43, is connected. The adjustment spring 54 is adjusted so as to be urged in a direction opposite to the urging direction of the push spring 52 with respect to the reciprocation of the movable rod 48. As a result, there is a large difference between the magnitude of the load on the electromagnetic actuator 43 when the pressing shoe 42 is in the restrained position and the magnitude of the load on the electromagnetic actuator 43 when the pressing shoe 42 is in the open position. The difference is prevented from occurring.

At the portion between the upper end of the displacement lever 49 of the movable opening 48 and the vertical portion 47, a stop horn 55 that regulates the range in which the upper end of the displacement lever 49 is slid is fixed. ing. The stopper 55 pushes the other end of the displacement lever 49 when the movable rod 48 is advanced, and rotates the displacement lever 49 in a direction in which the pressing shoe 42 is displaced to the open position. It has become.

FIG. 7 is a sectional view showing the electromagnetic actuator 43 of FIG. In the figure, the electromagnetic actuator 43 has a movable iron core (movable part) 56 fixed to the rear end of a movable rod 48 and a drive part 57 for displacing the movable iron core 56.

The movable iron core 56 can be displaced between an operating position in which the pressing shoe 42 restrains the governor rope 9 in the restrained position and a release position in which the pressing shoe 42 is displaced to the open position to release the restraint of the governor rope 9. ing.

The driving part 57 includes a fixed core 61 including a pair of restricting parts 58, 59 for restricting the displacement of the movable core 56, and a side wall part 60 connecting the restricting parts 58, 59 to each other. , Fixed iron core

The first coil 62, which is a coil for release that displaces the movable core 56 in the direction that comes into contact with one of the restricting portions 58 when energized, and is accommodated in the fixed core 61, and is energized on the other side. The second coil 63, which is an operation coil for displacing the movable iron core 56 in the direction in contact with the regulating portion 59, and an annular coil disposed between the first coil 62 and the second coil 63. And permanent magnets 64.

The regulating portion 58 has a through hole 65 through which the movable rod 48 passes. PT / JP2004 / 006325. The movable iron core 56 comes into contact with one restricting portion 58 when in the release position, and comes into contact with the other restricting portion 59 when in the operating position.

The first coil 62 and the second coil 63 are annular electromagnetic coils surrounding the movable iron core 56. Further, the first coil 62 is disposed between the permanent magnet 64 and one restricting portion 58, and the second coil 63 is disposed between the permanent magnet 64 and the other restricting portion 59. You.

In a state where the movable core 56 is in contact with the negative regulating portion 58, since a space serving as a magnetic resistance exists between the movable core 56 and the other regulating portion 59, the permanent magnet 6 4 The amount of magnetic flux becomes larger on the first coil 62 side than on the second coil 63 side, and the movable iron core 56 is held in contact with one of the regulating portions 58.

In addition, when the movable core 56 is in contact with the other regulating portion 59, since a space serving as a magnetic resistance exists between the movable core 56 and one regulating portion 58, the permanent magnet 6 The amount of magnetic flux of 4 becomes larger on the second coil 63 side than on the first coil 62 side, and the movable core 56 is held in contact with the other regulating portion 59.

An operation signal 74 from the IZO port 13 (FIG. 1) is input to the electromagnetic actuator 43 so that the power stored in the capacitor is supplied to the second coil 63. I have. In addition, the second coil 63 generates a magnetic flux against the force for holding the movable iron core 56 in contact with one of the restricting portions 58 by supplying power from the capacitor. In addition, the power stored in the capacitor is supplied to the first coil 62 by inputting a return signal from the processing unit 14 to the electromagnetic actuator 43. Further, the first coil 62 generates a magnetic flux against the force for holding the movable core 56 in contact with the other regulating portion 59 by supplying power from the capacitor.

Next, the operation will be described. During normal operation, the pressing shoe 42 is displaced to the open position by the advancement of the movable rod 48 (FIG. 6). The wedge 20 of each safety gear 7 is separated from the car guide rail 2 (FIG. 4).

When the speed of the car 3 rises abnormally and exceeds the first overspeed setting level 18 (FIG. 3), an operation signal 73 is output from the control device 12 to the brake device of the hoisting machine 4, and the brake device is operated. I do. As a result, the drive sheave 4a is braked, and the car 3 is braked. Even if the brake device of the hoisting machine 4 is activated, the speed of the car 3 continues to increase due to, for example, the cutting of the main rope 5 and exceeds the second overspeed setting level 19 (FIG. 3). The operation signal ⁷⁴ is output from the device 12 to the rope catch device 15. As a result, the power stored in the capacitor is instantaneously supplied to the second coil 63. As a result, the movable rod 48 is retracted, and the displacement lever 49 is rotated counterclockwise in FIG. Thereafter, the pressing shoe 42 is pressed against the governor 8 via the governor rope 9 and displaced to the restraining position. Thus, the governor rope is restrained by the rope catching device 15. In a state where the pressing shoe 42 is displaced to the binding position, the movable iron core 56 is held in contact with the other regulating portion 59.

Due to the restraining of the governor rope 9 by the rope catching device 15, the governor rope 9 is displaced upward with respect to the car 3 descending at an abnormal speed, and the wedge 20 is displaced upward in a direction approaching the gripper 22. You. At this time, the wedge 20 is displaced in a direction in contact with the car guide rail 2 while sliding on the inclined portion 33. Thereafter, the wedge 20 and the pressing member 31 come into contact with the car guide rail 2 and are pressed. The wedge 20 is further displaced upward by the contact with the car guide rail 2, and is inserted between the car guide rail 2 and the sliding member 30. As a result, a large frictional force is generated between the wedge 20 and the pressing member 31 and the car guide rail 2, and the car 3 is braked.

When releasing the braking of the car 3, after raising the car 3, a return signal is output from the control device 12 to the rope catching device 15. As a result, the electric power stored in the capacitor is instantaneously supplied to the first coil 62. As a result, the movable rod 48 is advanced. Thereafter, the displacement lever 49 is brought into contact with the stopper 55 and is rotated clockwise in FIG. As a result, the pressing shoe 42 is displaced to the open position, and the restraint of the governor rope 9 is released.

Next, the procedure of the operation test of the abnormal braking system of the elevator will be described. First, lift the governor rope 9 from the governor sheave 8 to make the governor sheave 8 free. Thereafter, a rotating device such as an electric drill is pressed against the governor sheave 8 to rotate the governor sheave 8. Press the tachometer on governor sheave 8 to Measure the rotation speed of PanaSieve 8.

When the governor sheave 8 is rotated by the rotating device, the display 75 displays the detected position of the car 3 detected by the encoder 1 and the first overspeed setting level 18 and the second overspeed at the detected position. Each value of speed setting level 19 is displayed. The detected position of the car 3 displayed on the display 75 is different from the actual position of the car 3 in most cases because the measurement is performed while the governor rope 9 is floated from the governor 8.

Then, while watching the display on the display 75 and the tachometer, increase the rotation speed of the governor sheave 8, and the rotation speed of the governor sheave 8 corresponding to the detection position of the car 3 becomes the value of the first overspeed setting level 18 Is exceeded, the operation signal 73 is output from the control device 12 to the brake device of the winding machine 4. At this time, by comparing the value of the first overspeed setting level 18 displayed on the display 75 with the value of the rotation speed of the governor rope 8 measured by the tachometer, the operation of the brake device of the hoisting machine 4 is performed. Check for abnormalities. That is, when the difference between the value of the first overspeed setting level 18 and the value of the rotation speed of the governor sheave 8 by the tachometer is within the allowable range, the operation of the brake device of the hoisting machine 4 is determined to be normal, and the allowable range is set. When it is out of the inside, the operation of the brake device of the hoisting machine 4 is regarded as abnormal.

Thereafter, the rotation speed of the governor sheave 8 is further increased. When the rotation speed of the governor sheave 8 corresponding to the detected position of the car 3 exceeds the value of the second overspeed setting level 19, the activation signal 7 4 is output to the control device 1 It is output from 2 to the rope catching device 15. At this time, by comparing the value of the second overspeed setting level 19 displayed on the display 75 with the value of the rotation speed of the governor mouthpiece 8 measured by the tachometer, the rope catching device is used. 15 Check for any abnormal operation. That is, when the difference between the value of the second overspeed setting level 19 and the value of the rotation speed of the governor sheave 8 by the tachometer is within the allowable range, the operation of the rope catching device 15 is regarded as normal and within the allowable range. If not, the operation of the rope catching device 15 will be abnormal.

Thereafter, the governor rope 9 is wrapped around the governor sheep 8 so that the detected position of the car 3 matches the actual position of the car 3 and the operation test of the abnormal braking system is completed. In such an emergency braking system for elevators, encoder 11 detects The detected position of the car 3 and the values of the first overspeed setting level 18 and the second overspeed setting level 19 at that detection position are displayed on the display 75. Even when the first overspeed setting level 18 and the second overspeed setting level 19 are set to change continuously according to the position of the car 3, during the operation test of the system, It is possible to easily and accurately confirm the value of each set level when each of the brake device and the rope catch device 15 of the hoisting machine 4 operates. Therefore, it is possible to easily and accurately confirm the timing at which the brake device and the rope catching device 15 of the hoisting machine 4 operate, and perform an operation test of the brake device and the rope catching device 15 of the hoisting machine 4. It can be done easily and accurately. Embodiment 2

FIG. 8 is a block diagram showing a control device 12 of an abnormal braking system for an elevator according to Embodiment 2 of the present invention. In the figure, the IZ port 14 has a normal mode in which the position information 71 from the encoder 11 can be input to the IZO port 14 and the desired setting information 81 as the position information of the car 3 / ΟA switching switch 82 that can be switched between a test mode in which input can be made to the port 14 is electrically connected. In the normal mode, the position information 71 from the encoder 11 is always input. In the normal mode, the detection position of the car 3 obtained from the position information 71 and the respective values of the first overspeed setting level 18 and the second overspeed setting level 19 at the detection position are different. It is shown on the display 75. Therefore, when the governor sheep 8 is rotated, the value displayed on the display 75 changes according to the rotation. In the test mode, the setting position of car 3 obtained from the setting information 81 input to I / 0 port 14 and the 1st overspeed setting level 1 and 2nd overspeed setting level 1 at that setting position Each value of 9 is displayed on the display 75. Therefore, even if the governor sheave 8 is rotated, the value displayed on the display 75 remains unchanged. Other configurations and operations are the same as those of the first embodiment.

Next, the procedure of the operation test of the abnormal braking system will be described. First, the winding machine

Select the position of the car 3 where you want to operate the brake device 4 and the rope catch device 15 The corresponding setting information 81 is input to the IZO port 14 and the setting information 81 is stored in the storage unit 76.

Thereafter, the governor sheave 8 is rotated by the rotating device in the same manner as in the first embodiment, and the brake device and the rope catch device 15 of the hoisting machine 4 are sequentially operated while increasing the rotation speed of the governor sheave 8. When the brake device of the hoisting machine 4 is operated, it is checked whether the difference between the rotation speed of the governor sheave 8 by the tachometer and the value of the first overspeed setting level 18 is within an allowable range, When the rope catching device 15 is operated, it is checked whether the difference between the rotation speed of the governor sheave 8 and the value of the second overspeed setting level 19 by the tachometer is within an allowable range.

After this, change the value of the setting information 81 and perform the test again according to the above procedure. By repeating this test, it is confirmed for each set position of the car 3 whether the operation of the brake device of the hoisting machine 4 and the operation of the rope catch device 15 are abnormal.

After that, the governor rope 9 is wound around the governor sheave 8, and the mode of the control device 12 is switched from the test mode to the normal mode by the switching switch 8 2.

In such an abnormal braking system for an elevator, the control device 12 includes a normal mode in which the position of the car 3 can be obtained based on the position information 71 from the encoder 11 and a desired mode input from the outside. Since it is possible to switch between the test mode in which the position of the car 3 can be obtained based on the setting information 8 1, by setting the control device 12 to the test mode, regardless of the rotation of the governor sheave 8, The position of the car 3 can be freely set in the control device 12. Thereby, the position of the car 3 can be easily set, and the operation tests of the brake device and the rope catch device 15 of the hoisting machine 4 can be performed more easily. Embodiment 3.

FIG. 9 is an explanatory diagram illustrating a control method of the control device 12 of the abnormal braking system for an elevator according to Embodiment 3 of the present invention. In the figure, the control device 12 is a car

Normal mode in which the car 3 travels so that the speed of 3 becomes the normal speed setting level 17 and the value of the first overspeed setting level 18 at the sample position at a predetermined distance X from the end of the hoistway 1 Run car 3 at sample speed Vos (x), which is the same speed as It is possible to switch between the test modes. Further, in the test mode, when the car 3 passes through the operating position (in this example, the intermediate position M of the hoistway 1) farther from the end of the hoistway 1 in the test mode, An operation signal 73 is forcibly output from the I / O port 14 to the brake device of the hoisting machine 4. As a result, the brake device is operated, and the car 3 is braked and stopped. The sample position is set within the acceleration / deceleration section.

The display # 5 displays the speed V _BQS of the car 3 at the simulated terminal position at a distance X from the intermediate position M of the hoistway 1. Other configurations and operations are the same as those of the first embodiment.

Next, the procedure of the operation test of the abnormal braking system will be described. First, the control of the control device 12 is switched from the normal mode to the test mode, and the car 3 is driven at the sample speed Vos (x).

Thereafter, when the car 3 reaches the intermediate position M of the hoistway 1, the brake device is operated. As a result, the drive sheep 4a is braked, and the car 3 is stopped. That is, the behavior of the car 3 when the car 3 is braked by the brake device at the sample position is simulated in an intermediate portion of the hoistway 1. At this time, the display 75 shows the speed V _B of the car 3 at the simulated end position. _S is displayed.

After this, the speed of the car 3 shown on the display 75 5 V _B. Check whether _S is within the allowable range of the buffer capacity of the buffer installed at the bottom of hoistway 1.

In such an abnormal braking system for an elevator, a normal mode in which car 3 runs at the speed of car 3 during normal operation, and a first transient at a sample position at a predetermined distance X from the end of hoistway 1 are described. It is possible to switch between the test mode in which the car 3 runs at the same speed as the value of the speed setting level 18 and the sample speed Vos (x) .In the test mode, the intermediate position M of the hoistway 1 can be switched. When the car 3 passes, the operation signal 73 is forcibly output from the control device 12 to the brake device of the hoisting machine 4, so that the car 3 near the end of the hoistway 1 The behavior can be reproduced in the middle part of the hoistway 1, and the operation of the brake device of the hoisting machine 4 can be adjusted without directly colliding with the shock absorber.

In addition, the display 75 has a simulated end position at a distance X from the intermediate position M. Speed V _B of the car 3 in. _{Since S} is displayed, the speed of the car 3 when colliding with the shock absorber can be easily and accurately confirmed, and the operation test of the brake device of the hoisting machine 4 can be performed more easily and. Can be done accurately.

In the above example, the car 3 runs at the same speed as the value of the first overspeed setting level 18 at the sample position, and the brake device of the hoisting machine 4 operates at the intermediate position M of the hoistway 1. Car 3 runs at the sample speed V _TR (x), which is the same speed as the value of the second overspeed setting level 19 at the sample position, and car 3 is at the intermediate position of hoistway 1. When passing through M, the control device 12 may forcibly output the operation signal 74 to the rope catching device 15 to operate the mouth catching device 15.

In this way, the behavior of the car 3 near the end of the hoistway 1 can be reproduced in the middle part of the hoistway 1, and the braking state of the car 3 by the operation of the rope catching device 15 can be changed. You can see it in the middle of 1. Therefore, the operation test of the rope catching device 15 can be easily and accurately performed.

Further, when the operation test of the above-described rope catching device 15 is performed, the speed of the car 3 at the simulated terminal position away from the intermediate position M by the distance X may be displayed on the display 75. Thereby, the speed of the car 3 when colliding with the shock absorber can be easily and accurately confirmed, and the operation test of the rope catching device 15 can be performed more easily and accurately. Embodiment 4.

Note that, in the above example, the speed V _B of the car 3 at the simulated end position that is at a distance X from the intermediate position M. _S is to be displayed on the display 75, but the distance D _s from the intermediate position M to the stop of the car 3 by the operation of the braking device. _s may be displayed on the display 75.

As a result, the car to the end of the hoistway 1

Whether the collision of 3 can be prevented can be easily and accurately checked in the middle of the hoistway 1, and the operation test of the brake device of the hoisting machine 4 can be performed easily and accurately. Can be. Therefore, the operation of the brake device and the adjustment of the braking force can be easily and correctly performed. Surely;

Further, the distance until the car 3 is stopped by the operation of the rope catching device 15 may be displayed on the display 75. Thereby, the operation test of the rope catching device 15 can be easily and accurately performed. Embodiment 5

FIG. 10 is a configuration diagram showing a rope catching device of an abnormal braking system for an elevator according to Embodiment 5 of the present invention. In the figure, an electromagnetic actuator 81 is attached to the attachment member 45. The electromagnetic actuator 81 activates the movable part 82 and the movable part 82 which can be displaced between an operating position for restraining the governor rope 9 on the pressing shoe 42 and a release position for releasing the restraint of the governor rope 9. A push spring 83 serving as a biasing portion for biasing to a position, and an electromagnetic magnet 84 for displacing the movable portion 82 to a release position against the bias of the push spring 83 are provided. The electromagnetic magnet 84 is mounted on the horizontal part 46.

The movable part 82 is fixed to the movable plate 85 and the movable plate 85 attracted to the electromagnetic magnet 84 when the electromagnetic magnet 84 is energized, and can slide the electromagnetic magnet 84 and the vertical part 407. And a movable rod 86 penetrating therethrough.

The distal end of the movable rod 86 is connected to the upper end of the displacement lever 49 via a link 87. The link 87 is rotatably connected to each of the movable rod 86 and the displacement lever 49. A spring connection portion 88 is fixed to a portion of the movable opening 86 between the electromagnetic magnet 84 and the vertical portion 47. The compression spring 83 is connected between the spring connection part 88 and the vertical part 47.

Here, the displacement lever 49 is rotated by the reciprocating motion of the movable rod 86. Accordingly, a difference in displacement between the movable rod 86 and the displacement lever 49 causes a change in the positional relationship between the movable rod 86 and the displacement lever 49. To allow this change, a link 87 is connected between the movable rod 86 and the displacement lever 49 _(the electromagnetic actuator 81 is operated by input of an operation signal from the controller 12). The electromagnetic actuator 81 is activated when the power supply to the electromagnetic magnet 84 is stopped, and is enabled by the operation of the electromagnetic actuator 81. The moving part 82 is retracted and displaced to the operating position. As a result, the pressing shoe 42 is displaced to the restrained position.

The operation of the electromagnetic actuator 81 is canceled by the input of a return signal from the control device 12. The electromagnetic actuator 81 is restored when the electromagnetic magnet 84 is energized. By releasing the operation of the electromagnetic actuator 81, the movable portion 82 is advanced and displaced to the release position. As a result, the pressing shoe 42 is displaced to the open position. The connecting mechanism 89 has a link 87 and a displacement lever 49. Other configurations are the same as those of the first embodiment.

Next, the operation of the rope catching device will be described. During normal operation, the return signal from the control device 12 is continuously input to the electromagnetic actuator 81, and the energization state to the electromagnetic magnet 84 is maintained. In this state, the movable portion 82 is at the release position, and the restraint of the governor rope 9 by the pressing shoe 42 has been released.

When an operation signal from the control device 12 is input to the electromagnetic actuator 81, energization of the electromagnetic magnet 84 is stopped. Thereby, the attraction of the movable plate 85 by the electromagnetic magnet 84 is released, and the movable portion 82 is retracted by the urging of the push spring 83 to be displaced to the operating position. As a result, the pressing shoe 42 is displaced to the restraining position, and the governor rope 9 is restrained. The subsequent operation is the same as in the first embodiment. At the time of return, the control device 12 outputs a return signal to the electromagnetic actuator 81, and energizes the electromagnetic magnet 84. As a result, the movable portion 82 is advanced, and the pressing shoe 94 is displaced to the open position. Thereby, the restraint of the governor rope 9 is released.

As described above, even in the abnormal start system of the elevator in which the rope clutch device is actuated by the electromagnetic actuator 81, the brake of the hoisting machine 4 is applied by applying the control device 12 shown in the first to fourth embodiments. The operation test of the device and the rope catching device can be easily and accurately performed. Embodiment 6 FIG. 11 is a configuration diagram illustrating a rope catch device of an abnormal braking system for an elevator according to a sixth embodiment of the present invention. In the figure, a fixing member 91 extending downward from the frame 41 is fixed to the lower end of the frame 41. A receiving portion 92, which is a high friction material, is attached to the fixing member 91. Further, an upper end of a substantially U-shaped displacement lever 93 is rotatably connected to the frame body 41.

A pressing member 94, which is a pressing member that can be displaced in a direction of coming into contact with and away from the receiving portion 92, is rotatably provided at an intermediate portion of the displacement lever 93. The rotation of the displacement lever 93 allows the pressing shoe 94 to be displaced between a restrained position pressed against the receiving portion 92 via the governor rope 9 and an open position separated from the governor rope 9. The portion of the pressing shoe 94 that contacts the governor rope 9 is made of high friction material.

Below the frame 41, an actuator supporting member 96 having a projecting portion 95 is fixed. Electromagnetic actuator 43 having the same configuration as that of the first embodiment is supported on actuator supporting member 96. A movable rod 97 fixed to a movable iron core 56 extends horizontally from the electromagnetic actuator 43. The movable rod 97 penetrates the protrusion 95 slidably.

The lower end of the displacement lever 93 is slidably provided on the movable rod 97. In addition, a stud 98 that regulates a range in which the lower end of the displacement lever 93 slides is fixed to a tip end of the movable rod 97. A spring connection portion 99 is fixed to a portion between the lower end portion of the displacement lever 93 of the movable rod 97 and the projecting portion 95.

Between the lower end portion of the displacement lever 93 and the spring connecting portion 99, a pressing spring 94, which is an elastic body for pressing against the receiving portion 92, when pressed at the restrained position, is provided. It is connected. Further, between the protruding portion 95 and the spring connecting portion 99, an adjusting spring 101, which is an elastic body for reducing the load on the electromagnetic actuator 43, is connected.

The electromagnetic actuator 43 is operated by input of an operation signal from the control device 12. The movable rod 97 is advanced by the operation of the electromagnetic actuator 43 to displace the pressing shoe 94 to the restraining position. Ma The movable rod 97 is retracted by inputting a return signal to the electromagnetic actuator 43. The pressing shoe 94 is displaced to the open position by the retreat of the movable rod 97.

Note that the restraining portion 102 has a receiving portion 92 and a pressing shoe 94. The connecting mechanism 103 has a movable rod 97 and a displacement lever 93. Other configurations are the same as those of the first embodiment.

Next, the operation of the rope catching device will be described. During normal operation, the movable rod 97 is retracted, and the pressing shoe 94 is located at the open position. When an operation signal from the control device 12 is input to the electromagnetic actuator 43, the displacement lever 93 is rotated while the movable rod 97 is advanced, and the pressing shoe 94 is displaced to the restraining position. As a result, the gapana rope 9 is clamped between the receiving portion 92 and the pressing shoe 94. Subsequent operations are the same as in the first embodiment.

At the time of return, a return signal is output from the controller 12 and the movable rod 97 is retracted. As a result, the pressing shoe 94 is displaced to the open position, and the restraint of the governor rope 9 is released.

As described above, even if the restraining portion 102 of the rope catching device is an abnormal start system of an elevator in which the governor rope 9 is sandwiched from both sides, the control device 12 shown in the first to fourth embodiments can be applied. The operation test of the brake device and the rope catching device of the hoisting machine 4 can be easily and accurately performed. Embodiment 7

FIG. 12 is a configuration diagram showing a rope catching device of an abnormal braking system for an elevator according to Embodiment 7 of the present invention. FIG. 13 is a configuration diagram showing a state where the rope catching device of FIG. 12 is operated. In the figure, a fixing member 111 is fixed near the governor rope 9. A receiving portion 112, which is a high friction material, is attached to a side surface of the fixing member 111.

In the hoistway 1, a horizontal axis 113 is fixed. Horizontal axis 1 1 3

It is arranged at almost the same height as 12. The horizontal axis 1 1 3 has an elastic stretch One end of the contracted body 114 is rotatably provided. At the other end of the elastic body 114, a pressing shoe 115, which can be displaced in a direction of coming and going with respect to the receiving part 112, is rotatably provided. The pressing shafts 115 are in a restraining position (Fig. 13) where they are pressed against the receiving part 112 via the governor rope 9, and an open position where the restraining of the governor rope 9 is released by being separated from the governor rope 9 (Fig. 1). 2), the elastic body 114 is displaced by the rotation of the elastic body 114 around the horizontal axis 113. The elastic elastic body 114 is contracted by the reaction force of the receiving part 112 when the pressing shoe 115 is at the restraining position.

The length of the elastic elastic body 114 was rotated so that the lower end of the pressing shell 115 did not contact the upper surface of the receiving part 112, and the elastic elastic body 114 became almost horizontal. At the time, it is adjusted so as to shrink between the horizontal axis 113 and the receiving part 112. In addition, the elastic elastic body 1 14 urges the elastic shroud 1 16 provided with the pressing shroud 1 15 and the pressing shroud 1 15 when in the restraining position toward the receiving portion 1 1 2 side. And a compression spring 1 17.

The telescopic opening 1 16 has a first connecting portion 1 18 rotatably provided on the horizontal shaft 1 13 and a second connecting portion rotatably provided on the pressing shaft 1 15. 1 and a telescopic part 120 connecting the first and second connecting parts 118 and 119. The expansion / contraction part 120 has a plurality of slide cylinders 121 that can slide with each other. Further, the extendable portion 120 can be extended and contracted by sliding the respective slide cylinders 121 with each other.

The compression spring 1 17 is connected between the first and second connection portions 1 18 and 1 19. Further, the push spring 117 generates an elastic restoring force in a direction in which the elastic expandable member 114 expands due to the displacement of the first connecting portion 118 and the second connecting portion 119 toward each other. It is supposed to.

An electromagnetic actuator 43 having the same configuration as that of the first embodiment is installed in the hoistway 1. A movable port 122 that can reciprocate with respect to the electromagnetic actuator 43 extends vertically from the electromagnetic actuator 43. Movable rod 1 2

A spring connection portion 1 2 3 is fixed to a tip portion of 2. In addition, a portion between the spring connecting portion 1 2 3 of the movable rod 1 2 2 and the electromagnetic actuator 43 is provided with a fastener 1 2 4 Is provided so as to be slidable. A connection spring 125 is connected between the spring connection part 123 and the fastener 124.

The fastener 1 24 and the pressing shoe 1 15 are connected to each other via a connecting mechanism 1 26. The connection mechanism section 126 has a first link member 127 and a second link member 128 that are rotatably connected to each other.

The first link member 127 is supported on a support shaft 127 parallel to the horizontal shaft 113. The support shaft 1 29 is fixed in the hoistway 1. An intermediate portion of the first link member 127 is rotatably provided on the support shaft 127. Also, one end of the first link member 127 is rotatably connected to the fastener 124, and the other end of the first link member 127 is connected to one end of the second link member 128. Part is rotatably connected. The length of the second link member 128 is shorter than the length of the first link member 127. The other end of the second link member 128 is rotatably connected to the pressing shoe 115.

The pressing shaft 115 is rotated downward about the horizontal shaft 113 by the upward displacement (forward movement) of the movable rod 112, and is displaced to the restraining position. In addition, the pressing shaft 1 15 is rotated upward about the horizontal axis 113 by the downward displacement (retreat) of the movable rod 112, and is displaced to the open position. I have.

In addition, a stopper 130 is provided in the vicinity of the receiving portion 112 to restrict the downward rotation of the pressing housing 115 and hold the pressing housing 115 at the restrained position. . Further, the pressing shoe 1 15 is rotated in the direction in which the pressing shoe 115 is pressed against the receiving portion 112 by contacting the governor rope 9 when the car 3 is descending. It has become so. Other configurations are the same as in the first embodiment.

Next, the operation of the rope catching device will be described. During normal operation, the movable rod 1 2 2 is retracted downward, and the pressing housing 1 15 is located at the open position (FIG. 12).

When an operation signal from the control device 12 is input to the electromagnetic actuator 43, the movable rod 122 is advanced upward, and the pressing shaft 115 is moved to the center of the horizontal shaft 113. JP2004 / 006325 Turned downward. At this time, the pressing shoe 1 15 pushes the governor rope 9 rightward in the figure while rotating downward, so that the governor rope 9 contacts the side surface of the receiving portion 112. Thereafter, the pressing shoe 1 15 is further pulled downward by the movement of the governor rope 9 and its own weight. At this time, with the governor rope 9 being sandwiched between the pressing shoe 1 15 and the receiving portion 1 12, the contraction position along the side surface of the receiving portion 1 1 2 Is displaced to As a result, the elastic restoring force of the pressing spring 1 17 is generated, and the pressing shoe 1 15 presses the governor rope 9 against the receiving portion 1 12. As a result, the governor rope 9 is restrained (FIG. 13). The subsequent operation is the same as in the first embodiment.

At the time of return, the return signal is output from the controller 12 and the movable rod 122 is moved backward. As a result, the pressing shoe 1 15 is displaced to the open position, and the restraint of the governor rope 9 is released.

As described above, even in the abnormal start system of the elevator having the rope catching device in which the restraining force on the governor rope 9 is increased by being pulled by the governor rope 9, the control device 12 shown in the first to fourth embodiments can be used. By applying the method, the operation test of the brake device and the rope catch device of the hoisting machine 4 can be easily and accurately performed. Embodiment 8

FIG. 14 is a front view showing a rope catching device of an abnormal braking system for an elevator according to Embodiment 8 of the present invention. In the figure, support shafts 14 1 and 14 2 are fixed to the frame body 41, respectively. At a portion between the support shaft 141 and the support shaft 142 of the frame body 41, a support portion 144 of the rotating shaft of the governor sheave 8 is provided. One end (lower end) of the support link 144 is provided on the support shaft 144. One end (lower end) of the displacement lever 144 is provided on the support shaft 142 so as to be rotatable. . Above the frame 41, a movable base 146 that can be displaced with respect to the frame 41 is arranged. The movable base 144 is connected to the other end (upper end) of each of the support link 144 and the displacement lever 144. As a result, the movable base 144 is supported by the frame 41 via the support link 144 and the displacement lever 144. 2004/006325 The movable base 1 4 6 includes a movable base body 1 4 7 and a screw rod 1 4 extending outward from the movable base body 1 4 7 and penetrating through the upper end of the displacement lever 1 4 5 so as to be able to slide. And 8. The upper end of the support link 144 is rotatably provided on the movable base body 144.

A spring fastener 150 that can adjust the distance from the movable base main body 147 is attached to the screw rod 148. Between the upper end of the displacement lever 147 and the spring fastener 150, there is disposed a compression spring 151 which is an elastic body attached to the screw rod 148. The compression spring 15 1 is compressed between the upper end of the displacement lever 1 47 and the spring fastener 150. As a result, the upper end of the displacement lever 147 and the spring fastener 150 are urged away from each other.

In the middle part of the displacement lever 147, a pressing member 152 serving as a pressing member is rotatably provided. The pressing shoe 15 2 can be displaced between a restrained position pressed against the governor sheave 8 via the governor rope 9 and an open position separated from the governor mouthpiece 9. The pressing shoe 152 is displaced between the restrained position and the open position by the rotation of the displacement lever 144 around the support shaft 141.

On the governor sheep 8, a ratchet gear 153 rotated integrally with the governor sheave 8 is fixed. The ratchet gear 153 has a plurality of teeth 154 on the outer periphery.

A latch support shaft 155 is fixed to the movable base body 147. A latch 157 having a claw portion 156 is rotatably provided on the latch support shaft 155. The latch 157 is provided between the engagement position where the claw portion 156 is engaged with the tooth portion 154 of the ratchet gear 153 and the release position where the engagement with the ratchet gear 153 is released. It can be displaced between them. The latch 157 is displaced between the engagement position and the release position by rotation about the latch support shaft 155.

The latch support shaft 155 is disposed at a position lower than the height of the leading end of the claw portion 156 when the latch 157 is at the engagement position. The cutting angle of the tooth portion 154 in the rotation direction of the ratchet gear 153 is determined by the trajectory of the claw portion 156 when the latch 157 is rotated around the latch support shaft 155. Corners that do not overlap teeth 1 5 4 It is a degree. As a result, the operation of displacing the latch 157 from the engagement position to the release position, that is, the magnitude of the driving force for the return operation can be reduced.

An electromagnetic actuator 43 having the same configuration as that of the first embodiment is mounted on the movable base body 147. A movable port 158 that can reciprocate with respect to the electromagnetic actuator 43 extends horizontally from the electromagnetic actuator 43. The movable rod 158 is reciprocated in the horizontal direction by the drive of the electromagnetic actuator 43. An elongated hole 163 is provided at the tip of the movable opening 158. A latch mounting member 159 slidably mounted in the elongated hole 163 is fixed to the latch 157. The latch 157 is displaced to the engagement position by the advance of the movable rod 158, and is displaced to the release position by the retreat of the movable rod 158.

When the latch 157 is in the release position, the movable base body 147 is balanced and supported by the support link 144 and the displacement lever 145, and the pressing shoe 155 is displaced to the open position. I have. In the state where the cage 3 is lowered, the spatula gear 15 3 is rotating (when the ratchet gear 15 3 is rotating in the direction C in the figure), the latch 15 7 is in the engaged position. The movable base body 1 47 is displaced to the direction in which the pressing shoe 15 2 is displaced to the restrained position by the rotational force of the ratchet gear 15 3 (left side of the frame with respect to the frame 41). To be displaced.

Note that the frame body 41 is provided with a first stopper 160 and a second stop horn 161, which regulate the rotation of the support link 144. By restricting the rotation of the support link 144 by the first stop horn 160, it is possible to prevent the pressing shoe 15 2 from being unnecessarily separated from the governor sheave 8. In addition, the rotation of the support link 144 by the second stopper 16 1 is restricted, so that the pressing force of the pressing shell 15 2 against the governor 8 can be prevented from becoming unnecessarily large. The governor rope 9 can be less damaged.

Next, the operation of the rope catching device will be described. During normal operation, the movable rod 158 is retracted and the latch 157 is displaced to the release position. Further, the pressing shoe 15 2 is disposed at the open position. At this time, support link 1 4

4 is in contact with the first stopper 160. When the rotation speed of the governor sheep 8 and the ratchet gears 15 3 becomes abnormal and the operation signal from the control device 12 is input to the electromagnetic actuator 43, the movable opening 158 is advanced and the latch 15 7 is displaced to the engagement position. As a result, the tooth portion 154 of the ratchet gear 153 is engaged with the latch 157.

Thereafter, the movable base body 147 is displaced leftward in the figure with respect to the frame 1 by the rotational force of the ratchet gear 1553, and the pressing shoe 152 is displaced to the restraining position. At this time, the pressing shoe 15 2 is pressed against the governor sheave 8 via the governor rope 9 by the urging of the pressing spring 15 1. As a result, the gapana rope 9 is restrained. The pressing force of the pressing shears 152 is made appropriate by the contact of the support link 144 with the second stopper 161. The subsequent operation is the same as in the first embodiment.

As described above, even in the abnormal start system of the elevator having the rope catching device that uses the rotational force of the governor sheave 8 as the restraining force on the governor rope 9, the control device 12 described in the first to fourth embodiments may be applied. Thereby, the operation test of the brake device and the rope catch device of the hoisting machine 4 can be easily and accurately performed. In each of the above embodiments, the emergency stop device is designed to brake against an overspeed of the car in the downward direction. However, when the emergency stop device is turned upside down, It may be mounted to brake against an overspeed in the upward direction.

Claims

The scope of the claims

1. Detector for detecting the position and speed of the car,

A storage section for storing an overspeed setting level set so as to decrease toward the end section in a predetermined section adjacent to the end section of the hoistway, and the cage of the car obtained by the information from the detection section; A control unit that outputs an operation signal when the detected speed of the car exceeds the overspeed set level at the detection position;

A display unit that is operated by the input of the operation signal, and that displays the detected position and the overspeed setting level at the detected position, based on information from the braking unit for braking the car, and the control unit.

An abnormal braking system for an elevator, comprising:

2. Detector for detecting the position and speed of the car,

It has a storage unit that stores the overspeed setting level set to decrease toward the end in a predetermined section adjacent to the end of the hoistway, and acquires the position of the car from information from the detection unit It is possible to switch between the normal mode where possible and the test mode where the position of the car can be obtained by information from external input, and at the position of the car, the detection speed of the car is the overspeed setting level. Control section that outputs an operation signal when

In response to the input of the operation signal, a braking unit for braking the car, and in the test mode, information on the control unit, the position of the car, and the overspeed setting level at the position of the car. Display section that displays

An abnormal braking system for an elevator, comprising:

3. The control unit controls the normal mode in which the car travels under normal operation control and the same speed as the value of the overspeed setting level at the sample position separated by a predetermined distance from the end of the hoistway. The mode can be switched between a test mode in which the car travels, and in the test mode, the operation signal is forcibly output when the car reaches an operation position in an intermediate portion of the hoistway. Features that 2. The abnormal braking system for an elevator according to claim 1, wherein:

4. The abnormality of the elevator according to claim 3, wherein the display unit further displays the detected speed of the car at a position away from the operating position by the predetermined distance. When braking system.

5. The braking of an elevator according to claim 3 or 4, wherein the display further displays a distance from the operating position to a stop of the car. system.