Speed monitoring device and elevator

Abstract

To provide a speed monitoring device that obtains reliability for monitoring of car travel speed.SOLUTION: A speed monitoring device 200 is configured, the speed monitoring device comprising a rotating body 107 that rotates independently of a sheave 104a of a hoisting machine 104 on which a rope (main rope) 103 connected to a car 101 of an elevator 100 is suspended and that is arranged to cause a deflector wheel 105 on which the rope 103 is suspended to abut on the outer peripheral surface, a deflector wheel encoder that outputs signals corresponding to the rotation of the rotating body 107 rotating in conjunction with the rotation of the deflector wheel 105, and an unintended car movement protection (UCMP) panel that monitors travel speed of the car 101 on the basis of output signals from the deflector wheel encoder.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a speed monitoring device that monitors the speed of a car and an elevator. [Background technology]

[0002] Conventionally, in elevators, there exists an Unintended Car Movement Protection (UCMP) that activates the dual brakes to stop the car when the car doors are open (hereinafter referred to as the "door open state") and the car moves a certain distance or more from the landing.

[0003] The UCMP is composed of a UCMP panel that is separate from the main control board that controls the entire elevator, and a dual brake system. This allows, for example, for the car to be stopped by the UCMP panel if the main control board fails, and for example, for the car to be stopped by the other brake if the braking force of one of the dual brake systems is reduced due to a failure.

[0004] Generally, an encoder is attached to the elevator hoist, and the UCMP determines whether the car is moving (running) or not based on the signal obtained from this encoder (hereinafter referred to as the "encoder signal"). The encoder signal is also sent to the main control board that controls each part of the elevator. The main control board controls the running of the car based on the encoder signal.

[0005] In order to ensure the safety of elevator users, in addition to UCMP, elevators are equipped with a governor that detects if the car is going too fast. The governor includes a governor rope, governor pulley, and oscillating weight. This allows the operation of the hoist to be stopped and the car to be stopped if the car is going too fast, ensuring the safety of elevator users.

[0006] Specifically, a related technology has been available that allows the speed conversion ratio to be automatically calculated when, for example, a door-open running protection device is added to an existing elevator using an add-on method (see, for example, Patent Document 1 below). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2018-52679 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, in speed monitoring using UCMP, in a configuration in which the main control board and the UCMP board operate based on the same encoder signal, the main control board and the UCMP board share the signal related to speed monitoring, which causes a problem of poor reliability.Specifically, for example, if an encoder breaks down, both the main control board and the UCMP board control each part based on the encoder signal output from the broken encoder, so even though the UCMP board is independent from the main control board, there is a problem of poor reliability in monitoring the car's moving speed.

[0009] As a countermeasure to this, for example, a governor pulley or other governor sheave may be used as a rotating body, and an encoder may be provided on this rotating body. However, since the governor rope speed is slowed down in its response to the actual cage speed using a spring or the like to prevent the overspeed switch or safety device from easily activating, if the brake is activated using an encoder signal from an encoder provided on this rotating body, it is not possible to quickly respond to sudden acceleration under the worst-case conditions assumed when UCMP is activated. For this reason, there is a problem in that using a governor sheave as a rotating body is unsuitable for speed monitoring to activate UCMP.

[0010] SUMMARY OF THE PRESENT EMBODIMENT In order to solve the above-mentioned problems associated with the conventional technology, an object of the present invention is to provide a speed monitoring device and an elevator that can ensure reliability in monitoring the moving speed of a car. [Means for solving the problem]

[0011] In order to solve the above-mentioned problems and achieve the object, the speed monitoring device of the present invention is characterized by comprising a rotating body that rotates independently of the sheave of a hoisting machine on which a main rope connected to an elevator car is suspended and is positioned with its outer circumferential surface in contact with a deflector pulley on which the main rope is suspended, a deflector pulley encoder that outputs a signal corresponding to the rotation of the rotating body that rotates in conjunction with the rotation of the deflector pulley, and a control board that monitors the moving speed of the car based on the output signal from the deflector pulley encoder.

[0012] The elevator of the present invention is characterized in that it comprises a hoisting machine equipped with a sheave on which a main rope connected to a car is suspended, a brake for stopping the movement of the car, a sheave encoder for outputting a signal corresponding to the rotation of the sheave, a main control board for driving and controlling the hoisting machine and monitoring the moving speed of the car based on the encoder signal output from the sheave encoder, a deflector sheave which rotates independently of the sheave and on which the main rope is suspended, a rotating body which is disposed with its outer circumferential surface in contact with the deflector sheave, a deflector sheave encoder for outputting a signal corresponding to the rotation of the rotating body which rotates in conjunction with the rotation of the deflector sheave, and a control board for monitoring the moving speed of the car based on the output signal from the deflector sheave encoder. Effect of the Invention

[0013] Advantageous Effects of Invention The speed monitoring device and elevator according to the present invention have the advantage of ensuring reliability in monitoring the car's moving speed. [Brief description of the drawings]

[0014] [Figure 1]FIG. 1 is an explanatory diagram showing the configuration of an elevator according to an embodiment of the present invention. [Diagram 2] 1 is an explanatory diagram (part 1) showing the appearance of a speed monitoring device according to an embodiment of the present invention; [Diagram 3] FIG. 2 is an explanatory diagram (part 2) showing the appearance of the speed monitoring device according to the embodiment of the present invention. [Figure 4] 1 is an explanatory diagram showing a hardware configuration of a speed monitoring device and an elevator according to an embodiment of the present invention. FIG. [Diagram 5] 4 is a flowchart (part 1) illustrating an example of a processing procedure of the speed monitoring device according to the embodiment of the present invention. [Figure 6] 4 is a flowchart (part 2) illustrating an example of a processing procedure of the speed monitoring device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a speed monitoring device and an elevator according to the present invention will be described in detail with reference to the accompanying drawings.

[0016] (Elevator configuration) First, the configuration of the elevator will be described. Fig. 1 is an explanatory diagram showing the configuration of an elevator according to an embodiment of the present invention. In Fig. 1, the elevator 100 can be realized by, for example, a rope type (traction type) elevator. The elevator 100 is installed in, for example, a building such as a multi-story building.

[0017] The elevator 100 includes a car (passenger car) 101 for carrying people and goods. One car 101 is provided for each elevator 100. The car 101 is provided in a hoistway (not shown) that passes through each floor of a building in the vertical direction, i.e., along the moving direction of the car 101.

[0018] The elevator shaft is provided on its side with a guide rail (not shown) that guides the elevator position of the car 101. The elevator shaft is also provided with a shock absorber 102 at its bottom to cushion the impact if the car 101 falls and hits the bottom surface of the elevator shaft. The shock absorber 102 may be a spring type shock absorber 102 that uses the elastic force of a spring to cushion the impact, or an oil-filled type shock absorber 102 that uses hydraulic resistance to cushion the impact. The shock absorber 102 may also be provided on the ceiling surface of the elevator shaft.

[0019] The cage 101 is connected to one end of a rope (main rope) 103. The rope 103 is suspended in a bucket-type manner from a sheave 104a or a deflector pulley 105 of a traction machine 104, and the other end is connected to a counterweight 106. Specifically, the rope 103 can be realized by, for example, a steel wire.

[0020] The deflector sheave 105 guides the rope 103 suspended from the sheave to the cage 101 (or the counterweight 106). The deflector sheave 105 has a fixed axle position and rotates around the axis at a fixed position (see FIG. 2). There may be one or more deflector sheaves 105.

[0021] A rotating body 107 is in contact with the deflector sheave 105. When the elevator 100 is equipped with a plurality of deflector sheaves, the rotating body 107 is disposed so as to be in contact with the deflector sheave 105 disposed in a position closest to the sheave 104a. More specifically, the rotating body 107 is disposed so as to be in contact with the deflector sheave 105 disposed in a position where the length of the rope 103 led from the sheave 104a is the shortest.

[0022] The deflector sheave 105, which is disposed closest to the sheave 104a, is preferably disposed lower than the sheave 104a in the vertical direction. The rope 103 is always in contact with the outer circumferential surface of the deflector sheave 105 due to its own weight and the tension generated by the weights of the cage 101, the counterweight 106, and the like.

[0023] The hoist 104 in the rope-type elevator 100 is installed, for example, in a machine room provided at the top of the elevator 100. The hoist 104 can be provided at the top of the elevator 100 regardless of whether or not there is a machine room. Alternatively, if the elevator 100 is a type that does not have a machine room, the hoist 104 may be provided at the bottom of the elevator 100.

[0024] The hoist 104 is controlled, for example, by an inverter, and is driven and controlled by a control panel (main control board) 108 so as to stop rotation at the floor where the car 101 is to be stopped. In the rope-type elevator 100, the car 101 is raised and lowered by utilizing the frictional force (traction) between the rope 103 and the deflector 105, which is generated by driving the hoist 104.

[0025] The hoist 104 is equipped with a sheave encoder (not shown), and the control panel 108 can determine the rotation speed and rotation position of the hoist 104 based on an output signal (encoder signal) from the sheave encoder. By determining the rotation speed and rotation position of the hoist 104, the control panel 108 can grasp the operating conditions such as the position of the car 101, the running speed, and the stopping position.

[0026] The sheave encoder may be, for example, an absolute encoder or an incremental encoder. The sheave encoder may be provided when the elevator 100 is installed, or may be added later after the installation.

[0027] The elevator 100 also includes a brake 109, a speed governor (governor machine) 110, a limit switch 111, and the like. The brake 109 can be realized, for example, by an electromagnetic brake that includes a coil and is driven and controlled by a control panel 108 to stop the rotation of the hoisting machine 104 by utilizing an electromagnetic force generated by passing electricity through the coil. The brake 109 can maintain the state in which the rotation of the hoisting machine 104 is stopped.

[0028] Brake 109 is a dual system brake, and may be either a constantly operating type or a standby type. A constantly operating dual system brake has two independent brake mechanisms, as shown in Fig. 1, and is configured so that even if one of the brake mechanisms fails, the other brake mechanism will stop car 101. A standby dual system brake has a brake mechanism used for normal operation and a rope-type brake mechanism (not shown) that is different from the brake mechanism used for normal operation, and is configured so that even if the brake mechanism used for normal operation fails, the rope-type brake mechanism will stop car 101.

[0029] The governor 110 detects when the cage 101 exceeds its speed limit. The governor 110 can be realized, for example, by a centrifugal governor equipped with a governor rope 110a, a governor pulley 110b, and a rotor (not shown). In such a governor 110, the governor rope 110a is linked to the operation of the cage 101. The governor pulley 110b rotates in conjunction with the operation of the governor rope 110a. The rotational speed of the governor pulley 110b changes according to the moving speed of the governor rope 110a (governor rope speed).

[0030] The oscillating weight operates according to the rotational speed of the governor pulley 110b, i.e., the magnitude of the centrifugal force caused by the rotation of the governor pulley 110b. Specifically, the oscillating weight operates to open toward the outer periphery of the governor pulley 110b when the rotational speed of the governor pulley 110b is fast, and operates to close toward the inner periphery of the governor pulley 110b when the rotational speed of the governor pulley 110b is slow.

[0031] The limit switch 111 includes a switch lever (not shown) that switches between supplying and cutting off power to the hoist 104. The switch lever is normally positioned at a position that supplies power to the hoist 104, and when biased by the rotor of the governor 110, is displaced to a position that cuts off the supply of power to the hoist 104.

[0032] The rotor of the speed governor 110 biases the switch lever so that, when the ascending / descending speed of the car 101 reaches a certain speed or higher relative to the rated speed, the switch lever is displaced to a position that cuts off the supply of power to the hoist 104. This makes it possible to stop the operation of the hoist 104 and stop the car 101 when the car 101 exceeds the speed limit.

[0033] Furthermore, the elevator 100 may be equipped with an emergency stop device. The emergency stop device forcibly stops the movement of the car 101 when the movement of the car 101 and the movement of the governor rope 110a differ, i.e., when the car 101 is moving even though the governor rope 110a has stopped. The emergency stop device can be easily realized using various known technologies, so a description thereof will be omitted.

[0034] The cage 101 is equipped with a door 101a. The cage 101 is also equipped with a motor (not shown) for opening and closing the door 101a, a door opening / closing sensor (see FIG. 4) for detecting the open / closed state of the door 101a, and an operation panel 101b. The motor for opening and closing the door 101a is driven and controlled by a control panel 108 to open and close the door 101a.

[0035] The output of the door open / close sensor changes depending on whether the door 101a or the door 112a is open or closed, depending on the state of a safety shoe located between the door 101a and the door 112a provided at a position (landing) 112 corresponding to each floor in the elevator. The door open / close sensor can be realized by, for example, a microswitch or a photoelectric sensor. The door open / close sensor is connected to the control panel 108 via a wire, and a signal output from the door open / close sensor is input to the control panel 108 via the wire.

[0036] The operation panel 101b is provided with an operation button group including various operation buttons, a display that displays the floor on which the car 101 is located, etc. The operation panel 101b is also provided with a microphone and a speaker to realize an interphone function. The operation panel 101b is provided with a control board for the operation panel 101b.

[0037] As described above, doors 112a are provided at positions (landings) 112 in the elevator shaft corresponding to each floor. The doors 112a provided at the landings 112 are locked by a device called an interlock (not shown). The interlock engages with the opening / closing mechanism of the door 101a of the car 101 to release the lock only when the motor provided in the car 101 is driven after the elevator 100 has arrived at a stop floor. This allows only the door 112a provided at the landing 112 on the floor where the car 101 is located to be opened and closed in conjunction with each other, among the doors 112a provided at each floor.

[0038] Further, each landing 112 in the elevator shaft is provided with a plate (not shown) for detecting the position of the car 101. A plurality of plates are provided in the longitudinal direction of the elevator shaft, i.e., in the vertical direction. The car 101 is provided with a car position detection sensor 101c for detecting the position of the car 101 using the plate.

[0039] The car position detection sensor 101c is provided, for example, on the outside of the car 101, on the ceiling or wall of the car 101. The car position detection sensor 101c includes a light-emitting element and a light-receiving element provided in a position opposite the light-emitting element. The car position detection sensor 101c outputs a signal according to the light-receiving state of the light-receiving element. Specifically, the car position detection sensor 101c outputs different signals to the control panel 108 when a plate is positioned between the light-emitting element and the light-receiving element of the car position detection sensor 101c as the car 101 moves and when the light-receiving element receives light emitted by the light-emitting element.

[0040] The plate is provided at a position that blocks light between the light emitting element and the light receiving element in the car position detection sensor 101c when the car 101 is located at the landing position (landing 112) on each floor. The plate may also be provided at a position that blocks light between the light emitting element and the light receiving element in the car position detection sensor 101c when the car 101 passes a position that is a predetermined distance away from the position where the car 101 stops on each floor. This makes it possible to identify the position of the car 101 before the car 101 reaches the destination floor.

[0041] An operation panel 113 having a platform call button 113a, a display 113b for displaying the floor where the car 101 is located, etc. is installed at each landing 112. Each operation panel 113 has a control board 113c for the operation panel 113 and is connected to the control panel 108 via the control board 113c.

[0042] Each part, such as the operation panel 101b, various sensors including the car position detection sensor 101c and the door opening / closing sensor, the hoist 104, the brake 109, the speed governor 110, the limit switch 111, and the operation panel 113 (control board 113c), is connected to the control panel 108 via cables 114.

[0043] (Configuration of speed monitoring device) Next, the configuration of the speed monitoring device will be described. Figures 2 and 3 are explanatory diagrams showing the appearance of a speed monitoring device according to an embodiment of the present invention. Figure 2 shows a schematic diagram of the speed monitoring device according to the embodiment of the present invention as viewed from above in the vertical direction. Figure 3 shows a schematic diagram of the AA cross section in Figure 2 (as viewed from the side of the speed monitoring device).

[0044] 2 and 3, a speed monitoring device 200 according to an embodiment of the present invention includes a rotating body 107, a deflection wheel encoder 205, and a UCMP board (control board: see FIG. 4). The rotating body 107 is provided so as to abut against the deflection wheel 105 from above the deflection wheel 105 in the vertical direction. The rotating body 107 is supported by a beam 203 that rotatably supports the deflection wheel 105 via a pin 201 and a lever 202.

[0045] Pin 201 is fixed to beam 203 by screws 204 or the like. Pin 201 has a rod shape and is fixed to beam 203 in a state where it protrudes from beam 203. Lever 202 is connected to the tip of pin 201 protruding from beam 203 at one end side in the longitudinal direction.

[0046] The rotating body 107 is connected to the other end of the lever 202. The rotating body 107 has a roller shape and is connected to the other end of the lever 202 in a state in which it can rotate around its axis. The rotating body 107 is connected to the other end of the lever 202 in a state in which its outer circumferential surface abuts against the outer circumferential surface of the deflector sheave 105. Since the outer circumferential surface of the rotating body 107 abuts against the outer circumferential surface of the deflector sheave 105, the rotating body 107 rotates with the rotation of the deflector sheave 105. In other words, the rotating body 107 rotates independently of the sheave 104a of the hoist 104 on which the rope 103 connected to the cage 101 is suspended.

[0047] Lever 202 may be connected to pin 201 so as to be rotatable around the axis of pin 201. In this case, lever 202 rotates in a direction in which the outer circumferential surface of rotating body 107 always abuts against the outer circumferential surface of deflection wheel 105 due to the weight of rotating body 107. By configuring in this manner, it is possible to maintain a state in which the outer circumferential surface of rotating body 107 always abuts against the outer circumferential surface of deflection wheel 105. This allows rotating body 107 to always rotate in conjunction with the rotation of deflection wheel 105.

[0048] A deflection wheel encoder (rotary encoder) 205 is provided inside the rotating body 107. The deflection wheel encoder 205 includes a rotating plate (disk) 205a having the same axis as the rotating body 107. The rotating plate 205a rotates at a speed corresponding to the rotation speed of the rotating body 107. That is, the rotating plate 205a rotates faster when the rotating body 107 rotates faster, and rotates slower when the rotating body 107 rotates slower. The rotating plate 205a includes a plurality of slits provided along the circumference of the rotating plate 205a.

[0049] The deflection wheel encoder 205 is equipped with a light emitting element and a light receiving element (both not shown) that face each other with the rotating plate 205a in between. The light receiving element receives the light emitted by the light emitting element that passes through the slits in the rotating plate 205a. The light receiving pattern per unit time that the light receiving element receives varies according to the rotation speed of the rotating plate 205a.

[0050] The deflection wheel encoder 205 outputs a signal according to the pattern of the light emitted by the light emitting element and received by the light receiving element. Since the rotation speed of the rotating plate 205a varies according to the rotation speed of the deflection wheel 105, the deflection wheel encoder 205 outputs a signal with a different pattern for each rotation speed corresponding to the rotation speed of the deflection wheel 105.

[0051] The speed monitoring device 200 is equipped with a UCMP board (control board) that is responsible for controlling the entire speed monitoring device 200 (see FIG. 4). The UCMP board monitors the moving speed of the car 101 based on a signal output from a deflection car encoder 205.

[0052] (Elevator hardware configuration including speed monitoring device 200) Next, a hardware configuration of the elevator 100 including the speed monitoring device 200 according to the embodiment of the present invention will be described. Fig. 4 is an explanatory diagram showing the hardware configuration of the speed monitoring device 200 and the elevator 100 according to the embodiment of the present invention.

[0053] 4, the control board 108 includes a CPU (Central Processing Unit) 410, a memory 411, a communication I / F (Interface) 412, an input terminal 413, and an output terminal 414. The components 410 to 414 constituting the control board 108 are connected to each other via a bus 415.

[0054] The CPU 410 controls each unit of the elevator 100 and is responsible for controlling the entire elevator 100. The memory 411 stores programs, data, and the like used to control each unit of the elevator 100. Specifically, the memory 411 stores, for example, a program for controlling the brake 109 to stop the car 101 when the moving speed of the car 101 reaches or exceeds a predetermined speed, data related to the predetermined speed, and the like.

[0055] The communication I / F 412 is connected to a communication network such as the Internet. This allows the elevator 100 to communicate (data communicate) with devices connected to the communication network, such as a management server computer, via the communication I / F 412.

[0056] Specifically, the communication I / F 412 can be realized by a wireless communication interface such as a mobile phone line (e.g., LTE (Long Term Evolution) or PHS (Personal Handy-phone System). The communication I / F 412 may also be realized by a wired communication interface such as a modem or a LAN adapter.

[0057] The communication I / F 412 may be connected to a public voice network, which is a network for voice communication, in addition to a communication network for data communication. This allows a person in the car 101 of the elevator 100 to talk directly to an operator of the maintenance company of the elevator 100.

[0058] The input terminal 413 is a connection terminal (hardware interface) that connects the control panel 108 and each unit included in the elevator 100, and receives input of signals output from each unit included in the elevator 100, and outputs the received input signals to the CPU 410. The input terminal 413 receives input of signals output from each unit included in the elevator 100 to the control panel 108, so-called "up signals." The connection between the input terminal 413 and each unit included in the elevator 100 may be wired or wireless.

[0059] The input terminal 413 is provided for each of the components of the elevator 100 that output signals to the CPU 410, such as the hoist 104, the operation panels 101b and 113, and the door opening / closing sensor 401. The control panel 108 may receive signals from a plurality of operation panels 113 provided on each floor, for example, at one input terminal.

[0060] The output terminal 414 is a connection terminal (hardware interface) that connects the control panel 108 and each unit included in the elevator 100, and outputs a signal output from the CPU 410 to each corresponding unit among the units included in the elevator 100. The output terminal 414 outputs a signal output to each unit that is driven and controlled by the CPU 410, that is, a so-called "down signal." The connection between the output terminal 414 and each unit included in the elevator 100 may be wired or wireless.

[0061] The output terminal 414 is provided for each of the components of the elevator 100 that operate in response to a signal output from the CPU 410, such as the hoist 104, the brake 109, the operation panels 101b and 113, and the limit switch 111. The control panel 108 may output a signal indicating the floor on which the car 101 is located, which is displayed on the operation panel 101b or the display 113b, to each component from a single output terminal 414.

[0062] The UCMP board 420 includes a CPU 421, a memory 422, an input terminal 423, an output terminal 424, and the like. Each component of the UCMP board 420 is connected to each other via a bus 425. The CPU 421 controls each component of the speed monitoring device 200. The memory 422 stores a program and various data used for monitoring the speed of the car 101 and controlling the brake 109. Specifically, the memory 422 stores a program for controlling the brake 109 to stop the car 101 regardless of the control of the control board 108 when the moving speed of the car 101 reaches or exceeds a predetermined speed or when the car 101 moves a predetermined distance or more with the door open, and various data used for executing the program.

[0063] The input terminal 423 is a connection terminal (hardware interface) that connects the UCMP board 420 and the door open / close sensor 401, and receives an input of a signal output from the door open / close sensor 401 and outputs the received input signal to the CPU 421. This enables the CPU 421 to grasp the open / closed state of the door 101a of the car 101.

[0064] As described above, the deflector car encoder 205 includes a light emitting element and a light receiving element. The light emitting element emits light under the control of the CPU 421. The light receiving element outputs a signal according to the intensity of the received light to the CPU 421. This allows the CPU 421 to monitor the moving speed of the car 101.

[0065] The deflection car encoder 205 may be connected via an input terminal 423. The input terminal 423 may also be connected to an output terminal 414 of the control panel 108. This allows the UCMP panel 420 to obtain, for example, information about the operating status of the elevator 100 from the control panel 108. The connection between the input terminal 423 and the door opening / closing sensor 401 (as well as the deflection car encoder 205 and the control panel 108) may be wired or wireless.

[0066] The output terminal 424 is a connection terminal (hardware interface) that connects the UCMP board 420 and the brake 109, and outputs a signal output from the CPU 421 to the brake 109. The output terminal 424 may be connected to an input terminal 413 of the control board 108. This allows the UCMP board 420 to notify the control board 108 of, for example, the operating state of the speed monitoring device 200 from the control board 108. The connection between the output terminal 424 and the brake 109 may be wired or wireless.

[0067] (Processing procedure of the speed monitoring device 200) Next, a description will be given of a processing procedure of the speed monitoring device 200 according to the embodiment of the present invention. Figures 5 and 6 are flowcharts showing an example of a processing procedure of the speed monitoring device 200 according to the embodiment of the present invention.

[0068] The speed monitoring device 200 always performs in parallel the process shown in the flowchart of Fig. 5 and the process shown in the flowchart of Fig. 6. The speed monitoring device 200 performs the process shown in the flowchart of Fig. 5 and the process shown in the flowchart of Fig. 6 regardless of the control of the control panel 108.

[0069] In the flowchart of Fig. 5, first, it is determined whether or not the cage 101 is moving (step S501). In step S501, it is possible to determine whether or not the cage 101 is moving based on the output signal from the deflector car encoder 205. In step S501, if it is determined that the cage 101 is not moving (step S501: No), it continues to determine whether or not the cage 101 is moving.

[0070] In step S501, when it is determined that the car 101 is moving (step S501: Yes), it is determined whether or not the moving speed of the car 101 is equal to or higher than a predetermined speed (step S502). In step S502, the moving speed of the car 101 can be determined based on the output signal from the deflector car encoder 205. Also, in step S502, it can be determined whether or not the moving speed of the car 101 is equal to or higher than a predetermined speed based on the data stored in the memory 422.

[0071] In step S502, if the moving speed of the car 101 is not equal to or greater than a predetermined speed (step S502: No), the process proceeds to step S501 to determine whether the car 101 is moving. On the other hand, in step S502, if it is determined that the moving speed of the car 101 is equal to or greater than a predetermined speed (step S502: Yes), a brake signal for stopping the car 101 is output to the brake 109 (step S503). As a result, if the moving speed of the car 101 is equal to or greater than the predetermined speed, the brake 109 is operated regardless of the control of the control panel 108 to stop the car 101.

[0072] In the flowchart of Fig. 6, first, it is determined whether or not the door 101a of the car 101 is open (step S601). In step S601, it is possible to determine whether or not the door is open based on the output signal of the door open / close sensor 401 acquired via the input terminal 423. If it is determined in step S601 that the door is not open (step S601: No), the determination of whether or not the door is open is continued.

[0073] In step S601, if it is determined that the door is open (step S601: Yes), it is determined whether the car 101 is moving (step S602). In step S602, similar to step S501, it is possible to determine whether the car 101 is moving based on the output signal from the deflector car encoder 205. In step S602, if it is determined that the car 101 is not moving (step S602: No), the process proceeds to step S601, and the determination of whether the door is open is continued.

[0074] In step S602, if it is determined that the car 101 is moving (step S602: Yes), it is determined whether the moving distance of the car 101 is equal to or greater than a predetermined distance (step S603). In step S603, the moving distance of the car 101 can be determined based on the output signal from the deflector car encoder 205. Also, in step S603, it can be determined based on the data stored in the memory 422 whether the moving distance of the car 101 is equal to or greater than a predetermined distance.

[0075] In step S603, if it is determined that the distance traveled by the car 101 is not equal to or greater than the predetermined distance (step S603: No), the process proceeds to step S602 to determine whether or not the car 101 is moving. On the other hand, in step S603, if it is determined that the distance traveled by the car 101 is equal to or greater than the predetermined distance (step S603: Yes), a brake signal for stopping the car 101 is output to the brake 109 (step S604). As a result, if the car 101 that has stopped at the boarding area 112 or the like has moved a predetermined distance or more from the position where it was stopped, the brake 109 can be operated to stop the car 101 regardless of the control of the control panel 108.

[0076] As described above, the speed monitoring device 200 of an embodiment of the present invention is characterized by comprising: a rotating body 107 that rotates independently of the sheave 104a of the hoist 104 on which the rope (main rope) 103 connected to the car 101 of the elevator 100 is suspending, and is arranged with its outer circumferential surface in contact with the deflector pulley 105 on which the rope 103 is suspending; a deflector pulley encoder 205 that outputs a signal corresponding to the rotation of the rotating body 107 that rotates in conjunction with the rotation of the deflector pulley 105; and a UCMP panel (control board) 420 that monitors the moving speed of the car 101 based on the output signal from the deflector pulley encoder 205.

[0077] Moreover, the elevator 100 according to the embodiment of the present invention includes a hoist 104 having a sheave 104a on which a rope (main rope) 103 connected to a car 101 is suspended, a brake 109 for stopping the movement of the car 101, a sheave encoder for outputting a signal according to the rotation of the sheave 104a, a control panel (main control board) 108 for driving and controlling the hoist 104 and monitoring the moving speed of the car 101 based on the encoder signal output from the sheave encoder, and a control panel (main control board) 108 for controlling the driving of the hoist 104 and monitoring the moving speed of the car 101 based on the encoder signal output from the sheave encoder. It is characterized by comprising a deflector wheel 105 which rotates and on which the rope 103 is suspended, a rotating body 107 which is arranged with its outer circumferential surface in contact with the deflector wheel 105, a deflector wheel encoder 205 which outputs a signal corresponding to the rotation of the rotating body 107 which rotates in conjunction with the rotation of the deflector wheel 105, and a UCMP panel (control board) 420 which monitors the moving speed of the cage 101 based on a signal indicating the open / closed state of the door 101a of the cage 101 and an output signal from the deflector wheel encoder 205.

[0078] According to the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200, the moving speed of the car 101 can be monitored based on the output signal from the deflector pulley encoder 205, which is output in response to the rotation of the deflector pulley 105, which rotates independently of the sheave 104a of the hoisting machine 104.

[0079] This allows the control panel 108 to monitor the moving speed of the car 101 based on a signal different from the output signal from the sheave encoder used for speed monitoring, so that even in the unlikely event that the sheave encoder breaks down, the control panel 108 breaks down, or the control program that operates the control panel 108 is corrupted, reliability of monitoring the moving speed of the car 101 can be ensured.

[0080] In this way, according to the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200, the safety of users of the elevator 100 can be improved.

[0081] As described above, the governor rope speed is designed to slow down its response to the actual cage speed by using a spring or the like to prevent the overspeed switch or safety device from easily activating. For this reason, if the governor sheave were used as a rotating body and the deflector wheel encoder 205 were provided on this rotating body, it would be unable to quickly respond to sudden acceleration under the worst-case conditions assumed when UCMP is activated, and so using the governor sheave as a rotating body is unsuitable for speed monitoring to activate UCMP.

[0082] In contrast, in an embodiment of the present invention, the speed of the elevator 100 can be monitored without sharing a sheave encoder and without using a governor, thereby ensuring reliability in monitoring the moving speed of the car 101 and improving the safety of users of the elevator 100.

[0083] Furthermore, according to the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200, the moving speed of the car 101 can be independently monitored based on the output signal from the deflector encoder 205 equipped in the speed monitoring device 200, which is different from the hoist encoder equipped in the hoist 104 (or provided in the hoist 104), regardless of the control of the control panel 108 or the output signal from the hoist encoder. This eliminates the need to change the design of the speed monitoring device 200 due to differences in the specifications of the hoist encoder. This makes it possible to easily apply the speed monitoring device 200 to existing elevators.

[0084] In addition, the speed monitoring device 200 of the embodiment of the present invention is characterized in that the UCMP panel 420 controls the brake 109 equipped on the elevator 100 to stop the car 101 when the moving speed of the car 101 becomes equal to or exceeds a predetermined speed based on the output signal from the deflector car encoder 205.

[0085] Furthermore, the elevator 100 according to the embodiment of the present invention is characterized in that the UCMP panel 420 controls the brake 109 to stop the car 101 when the moving speed of the car 101 reaches or exceeds a predetermined speed based on the output signal from the deflector car encoder 205.

[0086] According to the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200, when the moving speed of the car 101 reaches or exceeds a predetermined speed, the brake 109 can be activated to stop the car 101, regardless of the control of the control panel 108 of the elevator 100.

[0087] This allows the car 101 to be stopped reliably even in the unlikely event that the sheave encoder breaks down, the control panel 108 breaks down, or the control program that operates the control panel 108 is damaged.

[0088] In this way, the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200 can reliably prevent the car 101 from running out of control, thereby improving the safety of users of the elevator 100.

[0089] In addition, the speed monitoring device 200 of the embodiment of the present invention is characterized in that the UCMP panel 420 controls the brake 109 equipped on the elevator 100 to stop the car 101 when the car 101 moves a certain distance with the door 101a open, based on a signal indicating the open / closed state of the door 101a of the car 101 and an output signal from the deflector car encoder 205.

[0090] Furthermore, the elevator 100 of the embodiment of the present invention is characterized in that it is equipped with a door opening / closing sensor 401 that outputs a signal indicating the open / closed state of the door 101a of the car 101, and the UCMP panel 420 controls the brake 109 to stop the car 101 when the car 101 has moved a certain distance with the door 101a open, based on the output signal from the door opening / closing sensor 401 and the output signal from the deflector car encoder 205.

[0091] According to the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200, when the car 101 moves a certain distance from the landing 112 or the like with the doors open, the brake 109 can be activated to stop the car 101, regardless of the control of the control panel 108 of the elevator 100.

[0092] This makes it possible to reliably prevent the cage 101 from moving beyond a certain distance with the door open, even in the unlikely event that the sheave encoder breaks down, the control panel 108 breaks down, or the control program that operates the control panel 108 is damaged.

[0093] In this way, according to the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200, the safety of users of the elevator 100 can be improved.

[0094] In this way, the speed monitoring device 200 of the embodiment of the present invention and the elevator 100 equipped with the speed monitoring device 200 can reliably prevent the car 101 from running out of control, thereby improving the safety of users of the elevator 100.

[0095] The contents of the first embodiment will be described below as an addendum.

[0096] (Appendix 1) a rotor that rotates independently of a sheave of a hoisting machine on which a main rope connected to an elevator car is suspended, and is disposed with its outer circumferential surface in contact with a deflector pulley on which the main rope is suspended; a deflection wheel encoder that outputs a signal corresponding to the rotation of the rotating body that rotates in conjunction with the rotation of the deflection wheel; A control board that monitors the moving speed of the car based on an output signal from the deflection car encoder; A speed monitoring device comprising:

[0097] (Appendix 2) The control board controls the brake of the elevator to stop the car when the moving speed of the car reaches or exceeds a predetermined speed based on the output signal from the deflector car encoder. 2. A speed monitoring device according to claim 1.

[0098] (Appendix 3) The control board controls the brake of the elevator to stop the car when the car has moved a certain distance with the door open, based on a signal indicating the open / closed state of the car door and an output signal from the deflector car encoder. 2. A speed monitoring device according to claim 1.

[0099] (Appendix 4) A hoisting machine including a sheave on which a main rope connected to a cage is suspended; A brake for stopping the movement of the car; a sheave encoder that outputs a signal corresponding to the rotation of the sheave; A main control board that drives and controls the hoist and monitors the moving speed of the car based on the encoder signal output from the sheave encoder; A deflector pulley that rotates independently of the sheave and on which the main rope is suspended; A rotating body arranged with an outer circumferential surface in contact with the deflector wheel; a deflection wheel encoder that outputs a signal corresponding to the rotation of the rotating body that rotates in conjunction with the rotation of the deflection wheel; A control board that monitors the moving speed of the car based on a signal indicating the open / closed state of the car door and an output signal from the deflector car encoder; An elevator characterized by comprising:

[0100] (Appendix 5) The control board controls the brake to stop the car when the moving speed of the car becomes equal to or higher than a predetermined speed based on an output signal from the deflector car encoder. 5. The elevator according to claim 4,

[0101] (Appendix 6) A door opening / closing sensor is provided to output a signal indicating an opening / closing state of the car door, The control board includes: based on an output signal from the door opening / closing sensor and an output signal from the deflection car encoder, when the car moves a certain distance with the door open, the brake is controlled to stop the car; 5. The elevator according to claim 4, [Industrial Applicability]

[0102] INDUSTRIAL APPLICABILITY As described above, the speed monitoring device and elevator according to the present invention are useful for monitoring the speed of an elevator car, and are particularly suitable for improving the reliability of car speed monitoring. [Explanation of symbols]

[0103] 100 Elevator 101 Basket 104 Hoisting machine 104a Sheave wheel 105 Deflector 107 Rotating Body 109 Brake 205 deflection car encoder 205a Rotating plate 401 Door opening / closing sensor 420 UCMP board

Claims

1. a rotor that rotates independently of a sheave of a hoisting machine on which a main rope connected to an elevator car is suspended, and is disposed with its outer circumferential surface in contact with a deflector pulley on which the main rope is suspended; a deflection wheel encoder that outputs a signal corresponding to the rotation of the rotating body that rotates in conjunction with the rotation of the deflection wheel; A control board that monitors the moving speed of the car based on an output signal from the deflection car encoder; A speed monitoring device comprising:

2. A hoisting machine including a sheave on which a main rope connected to a cage is suspended; A brake for stopping the movement of the car; a sheave encoder that outputs a signal corresponding to the rotation of the sheave; A main control board that drives and controls the hoist and monitors the moving speed of the car based on the encoder signal output from the sheave encoder; A deflector pulley that rotates independently of the sheave and on which the main rope is suspended; A rotating body arranged with an outer circumferential surface in contact with the deflector wheel; a deflection wheel encoder that outputs a signal corresponding to the rotation of the rotating body that rotates in conjunction with the rotation of the deflection wheel; A control board that monitors the moving speed of the car based on an output signal from the deflection car encoder; An elevator characterized by comprising:

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