Elevator Safety Systems

Abstract

During the startup operation of the emergency stop actuator to transition to a standby state, operational abnormalities are detected to prevent the progression of component deterioration. [Solution] The emergency stop operating device includes a movable guide member displaceable between an operating position and a normal position, and an actuator that holds the movable guide member biased toward the operating position at the normal position. The safety monitoring device cuts off the supply of power to the actuator when abnormal travel of the car is detected, causing the emergency stop operating device to activate the emergency stop device. When the elevator is started up, the emergency stop operating device displaces the movable guide member from the operating position to the normal position by a start-up operation including lowering the car, and is set to a standby state. The safety monitoring device outputs an abnormality detection signal if the distance the car has descended exceeds a threshold before the movable guide member is displaced to the normal position by the start-up operation.

Description

[Technical field]

[0001] The present disclosure relates to an elevator safety system equipped with an emergency stop device. [Background technology]

[0002] Patent Document 1 discloses a technology relating to an elevator device that includes an emergency stop device installed in a car and an electric trigger that activates the emergency stop device. When the car is overspeeding, the emergency stop device is operated by an electric trigger installed on the top of the car and starts to grip the car guide rail to brake the car.

[0003] The electric trigger includes a stator having a solenoid core, and a movable element inserted into the solenoid core so as to be movable in and out. A biasing force is applied to the movable element by an elastic member so as to push the movable element outward from the solenoid core. In the non-operating state of the electric trigger, the movable element is held in an attracted state by an electromagnetic force larger than the biasing force. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021 / 166144 Summary of the Invention [Problem to be solved by the invention]

[0005] There is known an emergency stop operating device that operates an emergency stop device when the power supply to the actuator is cut off, such as the electric trigger of Patent Document 1. When starting up the elevator, the emergency stop operating device needs to perform a start-up operation that applies a force larger than the biasing force to transition the emergency stop operating device to a standby state. In such a start-up operation, since it is necessary to increase the capacity if only relying on the force of the actuator, it is possible to use the force generated by the relative displacement between the car and the guide rail. However, when the start-up operation involves the movement of the car, a technology is required to monitor the running of the car so that it does not deviate from the running for the start-up operation.

[0006] The present disclosure has been made to solve the problems described above, and aims to provide an elevator safety system that can detect operational abnormalities and prevent the progression of component deterioration during the startup operation that transitions the emergency stop operating device to a standby state. [Means for solving the problem]

[0007] The elevator safety system disclosed herein comprises an emergency stop device that makes an emergency stop of an elevator car moving up and down along the guide rail, a movable guide member that is displaceable between an operating position and a normal position, an operating spring that urges the movable guide member toward the operating position, and an actuator that receives power and holds the movable guide member in the normal position against the operating spring, and comprises an emergency stop operating device that operates the emergency stop device when the power supply to the actuator is cut off and the movable guide member is displaced to the operating position, and a safety monitoring device that cuts off the power supply to the actuator when abnormal running of the car is detected, wherein when the elevator is started up, the emergency stop operating device is configured to displace the movable guide member from the operating position to the normal position based on the force it receives from the guide rail due to the start-up operation including the lowering of the car, and the safety monitoring device is configured to output an abnormality detection signal if the descent distance of the car exceeds a threshold value before the movable guide member is displaced to the normal position due to the start-up operation. Effect of the Invention

[0008] According to the elevator safety system disclosed herein, it is possible to detect operational abnormalities and prevent the progression of component deterioration during the startup operation that transitions the emergency stop operating device to a standby state. [Brief description of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing an elevator according to an embodiment of the present invention; [Diagram 2] FIG. 2 is a front view showing the car of FIG. 1. [Diagram 3] 3 is a side view showing a main part of the safety device of FIG. 2. [Figure 4] 4 is a side view showing an operating state of the safety device of FIG. 3. [Diagram 5] FIG. 3 is a front view showing the safety device actuating device of FIG. 2. [Figure 6] 6 is a front view showing a state immediately after the start of the operating action of the safety device shown in FIG. 5. [Figure 7] 7 is a front view showing a state in which the operating wedge of FIG. 6 is displaced upward relative to the movable guide member. [Figure 8] 8 is a front view showing a state in which the operating wedge of FIG. 7 is further displaced upward relative to the movable guide member. FIG. [Figure 9] FIG. 9 is a front view showing a state of the safety device operating device when the car is lowered from the state shown in FIG. 8. [Figure 10] 3 is a front view showing a state in which the lifting rod in FIG. 2 is lifted up. FIG. [Figure 11] 10 is a front view showing a state immediately after the start of a return operation of the safety gear actuating device of FIG. 9. [Figure 12] FIG. 12 is a front view showing the state of the safety gear actuating device when the car in FIG. 11 is further elevated. [Figure 13] 13 is a front view showing a state in which the operating wedge of FIG. 12 is displaced downward. FIG. [Figure 14] FIG. 2 is a front view showing the state of the emergency stop operating device immediately after the elevator starts. [Figure 15] 15 is a front view showing a state in which the operating wedge of FIG. 14 is displaced upward relative to the movable guide member. FIG. [Figure 16] 16 is a front view showing a state in which the operating wedge of FIG. 15 is displaced downward. FIG. [Figure 17] 1 is a diagram showing a configuration of an elevator safety system according to an embodiment. [Figure 18] 5 is a flowchart showing a control routine for a startup operation executed in the safety system according to the embodiment. [Figure 19] FIG. 2 is a diagram illustrating an example of hardware resources of a safety monitoring device. [Figure 20] FIG. 13 is a diagram illustrating another example of hardware resources of the safety monitoring device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment will be described with reference to the drawings. In addition, elements common to the various drawings are given the same reference numerals, and duplicated explanations will be omitted.

[0011] Embodiment 1. Overall configuration of elevator safety system according to embodiment Fig. 1 is a schematic diagram showing an elevator according to an embodiment. In the figure, a machine room 2 is provided above a hoistway 1. In the machine room 2, a hoist 3, a deflector sheave 4, an elevator control device 5, and a safety monitoring device 6 are installed.

[0012] The hoist 3 has a drive sheave 7, a hoist motor (not shown), and a hoist brake (not shown). The hoist motor rotates the drive sheave 7. The hoist brake keeps the drive sheave 7 stationary. The hoist brake also brakes the rotation of the drive sheave 7.

[0013] A suspension body 8 is wound around the drive sheave 7 and the deflector sheave 4. A plurality of ropes or a plurality of belts are used as the suspension body 8. A car 9 is connected to a first end of the suspension body 8. A counterweight 10 is connected to a second end of the suspension body 8.

[0014] The car 9 and counterweight 10 are suspended by a suspension body 8, and move up and down in the elevator shaft 1 by rotating the drive sheave 7. The drive sheave 7 is provided with a car movement detector 13 that generates a signal corresponding to the movement of the car 9. As the car movement detector 13, for example, an encoder or a resolver that generates a signal corresponding to the rotation of the drive sheave 7 is used. The car movement detector may be configured as a governor encoder provided on the governor sheave, a linear encoder mounted on the car 9, a roller encoder provided on the roller shaft of a roller pressed against the car guide rail 11 from above the car 9, or the like. The detection signal output from the car movement detector 13 is sent to the safety monitoring device 6 and the elevator control device 5.

[0015] A pair of car guide rails 11 and a pair of counterweight guide rails 12 are installed in the hoistway 1. The car 9 rises and falls in the hoistway 1 along the pair of car guide rails 11. The counterweight 10 rises and falls in the hoistway 1 along the pair of counterweight guide rails 12. Only one car guide rail 11 and one counterweight guide rail 12 are shown in FIG. 1.

[0016] The elevator control device 5 functions as a travel control device that controls the operation of the car 9 by controlling the hoisting machine 3 based on the detection signal output from the car movement amount detection device 13.

[0017] The safety monitoring device 6 monitors running abnormalities of the car 9. Typically, the safety monitoring device 6 monitors whether the speed of the car 9 has reached an excessive speed based on a detection signal output from the car movement amount detection device 13. The safety monitoring device 6 also monitors whether the acceleration of the car 9 has reached an excessive acceleration based on the detection signal. Excessive speed and excessive acceleration are judgment values ​​for detecting abnormal running of the elevator car 9. The safety monitoring device 6 has the excessive speed and excessive acceleration set as judgment values ​​in advance.

[0018] The functions of the elevator control device 5 and the safety monitoring device 6 can each be realized by a computer. The functions of the elevator control device 5 and the safety monitoring device 6 will be described in detail later.

[0019] An emergency stop device 20 is provided under the car 9. The emergency stop device 20 grips the pair of car guide rails 11 to bring the car 9 to an emergency stop. A main part of the emergency stop device 20 will be described later.

[0020] The safety monitoring device 6 generates an operation command signal when the speed of the car 9 reaches an excessive speed and when the acceleration of the car 9 reaches an excessive acceleration. The operation command signal is a signal for operating the safety device 20.

[0021] The car 9 is equipped with an emergency stop actuator 30. The emergency stop actuator 30 has an actuator body 31 and a lifting rod 32.

[0022] The actuator body 31 is installed on the upper part of the car 9. The lifting rod 32 is connected between the actuator body 31 and the emergency stop device 20. The transmission mechanism in this embodiment is composed of the lifting rod 32. The actuator body 31 lifts the lifting rod 32 in response to an operation command signal from the safety monitoring device 6, and activates the emergency stop device 20. The main parts of the emergency stop actuator 30 will be described later.

[0023] 2. Configuration of the emergency stop device 20 Fig. 2 is a front view showing the car 9 of Fig. 1. The safety device 20 has an operating lever 21, an interlocking lever 22, a connecting rod 23, and an operation state detection device 50.

[0024] The operating lever 21 is rotatable around a horizontal operating lever shaft 21a together with the operating lever shaft 21a with respect to the car 9. The interlocking lever 22 is rotatable around a horizontal interlocking lever shaft 22a together with the car 9.

[0025] The connecting rod 23 is rotatably connected to each of the operating lever 21 and the interlocking lever 22. Furthermore, the connecting rod 23 transmits the rotation of the operating lever 21 to the interlocking lever 22, causing the interlocking lever 22 to rotate in conjunction with the operating lever 21. At this time, the direction of rotation of the interlocking lever 22 about the interlocking lever shaft 22a is opposite to the direction of rotation of the operating lever 21 about the operating lever shaft 21a.

[0026] The upper end of the lifting rod 32 is connected to the actuator body 31. The lower end of the lifting rod 32 is rotatably connected to the operating lever 21. When the lifting rod 32 is lifted, the operating lever 21 rotates counterclockwise in FIG. 2, and the interlocking lever 22 rotates clockwise in FIG. 2.

[0027] Fig. 3 is a side view showing a main part of the safety device 20 of Fig. 2. Fig. 4 is a side view showing the safety device 20 of Fig. 3 in an operating state.

[0028] 2, the emergency stop device 20 has an emergency stop frame 24, a pair of wedge guides 25, a pair of wedge guide springs 26, a pair of wedge members 27, and a pair of wedge connecting links 28. In FIG. 3, the pair of wedge connecting links 28 is omitted.

[0029] The emergency stop frame 24 is fixed to the lower part of the car 9. Each wedge guide spring 26 is provided between the corresponding wedge guide 25 and the emergency stop frame 24. Each wedge member 27 is connected to the operating lever shaft 21a via a corresponding wedge connecting link 28.

[0030] When the safety device 20 is inoperative, each wedge member 27 faces the car guide rail 11 at a distance. When the safety device 20 is inoperative, the pair of wedge members 27 are moved upward relative to the safety frame 24 by the rotation of the operating lever shaft 21a. At this time, each wedge member 27 is guided by the corresponding wedge guide 25 and approaches the car guide rail 11, coming into contact with the car guide rail 11.

[0031] When each wedge member 27 comes into contact with the car guide rail 11, a braking force is generated in the direction opposite to the falling direction of the car 9, and the car 9 is stopped. The magnitude of the braking force is the product of the pressing force of the pair of wedge members 27 against the car guide rail 11 by the pair of wedge guide springs 26 and the friction coefficient between each wedge member 27 and the car guide rail 11.

[0032] 3 and 4 is provided on the interlocking lever shaft 22a side. When the safety device 20 is activated, the safety device 20 grips the pair of car guide rails 11 simultaneously.

[0033] The operation state detection device 50 is a device for detecting the operation state of the emergency stop device 20. The emergency stop device 20 switches from a non-operated state to an activated state when the operating lever 21 rotates counterclockwise in FIG. 2 and the pull-up rod 32 is pulled up. The operation state detection device 50 is, for example, a mechanical switch installed in a position capable of detecting that the operating lever 21 has rotated counterclockwise in FIG. 2. According to this configuration, the operation state detection device 50 outputs an ON signal when the emergency stop device 20 is in an activated state, and outputs an OFF signal when the emergency stop device 20 is in a non-activated state. The signal output from the operation state detection device 50 is sent to the safety monitoring device 6.

[0034] 3. Configuration of emergency stop operating device 30 Fig. 5 is a front view showing the safety device actuator 30 of Fig. 2. The actuator body 31 has a fixed frame 40, a lifting frame 41, a horizontally movable frame 42, a plurality of return springs 43, a movable guide member 44, a plurality of operating springs 45, an actuator 46, an operating wedge 47, a braking member 48, a plurality of main springs 49, and a position detector 52.

[0035] The fixed frame 40 is fixed to the upper part of the car 9. The lifting frame 41 is provided inside the fixed frame 40. The lifting frame 41 is displaceable in the up and down direction with respect to the car 9 between a non-raised position and a raised position.

[0036] The non-raised position is a position where the lifting frame 41 is placed on the bottom surface of the fixed frame 40, as shown in Fig. 5. The lifted position is a position where the lifting frame 41 is raised above the bottom surface of the fixed frame 40, as shown in Fig. 10, which will be described later. In other words, the lifted position is a position higher than the non-raised position.

[0037] The fixed frame 40 regulates the horizontal displacement of the lifting frame 41 and guides the vertical displacement of the lifting frame 41 .

[0038] The lifting frame 41 is displaced from the non-raised position to the raised position, thereby lifting the lifting rod 32 and activating the safety device 20. At this time, the lifting rod 32 transmits the upward displacement of the lifting frame 41 to the safety device 20.

[0039] The lateral movement frame 42 is provided inside the lifting frame 41. The lateral movement frame 42 is displaceable in the horizontal direction relative to the lifting frame 41, i.e., in the front-to-rear direction of the car 9, between a first horizontal position and a second horizontal position. The front-to-rear direction of the car 9 is a direction perpendicular to a straight line connecting the centers of the pair of car guide rails 11 when the car 9 is viewed from directly above, and is a direction parallel to the Y axis in FIG.

[0040] The first horizontal position is the position shown in Fig. 5. The second horizontal position is a position where the actuator 46 is farther from the car guide rail 11 than the first horizontal position, as shown in Fig. 8 described later. The lifting frame 41 guides the displacement of the lateral movement frame 42 in the horizontal direction.

[0041] The return springs 43 are provided between the lifting frame 41 and the lateral movement frame 42. The return springs 43 are compressed by the lateral movement frame 42 being displaced to the second horizontal position. As a result, the return springs 43 generate a force that returns the lateral movement frame 42 to the first horizontal position.

[0042] The movable guide member 44 is provided inside the lateral movement frame 42. The movable guide member 44 is displaceable in the horizontal direction relative to the lateral movement frame 42, i.e., in the front-rear direction of the car 9, between a normal position and an operating position.

[0043] The normal position is the position shown in Fig. 5. The operating position is a position in which the movable guide member 44 is closer to the car guide rail 11 than the normal position, as shown in Fig. 6, which will be described later. In the following description, the state in which the movable guide member 44 is displaced to the normal position is referred to as the "normal state."

[0044] Moreover, the movable guide member 44 has a guide surface 44a. The guide surface 44a faces a side surface of the car guide rail 11. Moreover, the guide surface 44a is inclined with respect to the car guide rail 11 so as to approach the car guide rail 11 as it goes upward.

[0045] The multiple operating springs 45 are provided between the lateral movement frame 42 and the movable guide member 44. The multiple operating springs 45 are compressed when the movable guide member 44 is located at the normal position.

[0046] The actuator 46 is provided between the lateral movement frame 42 and the movable guide member 44. As the actuator 46, for example, a solenoid is used.

[0047] During normal operation of the car 9, the actuator 46 generates a force to hold the movable guide member 44 in the normal position against the multiple operating springs 45. When the supply of electricity to the actuator 46 is cut off, the multiple operating springs 45 displace the movable guide member 44 to the operating position.

[0048] The operating wedge 47 is provided between the movable guide member 44 and the car guide rail 11. In addition, the operating wedge 47 is vertically displaceable relative to the movable guide member 44 along a guide surface 44a.

[0049] The braking member 48 is provided on the inside of the lateral movement frame 42. The braking member 48 faces the car guide rail 11 on the opposite side of the car guide rail 11 to the movable guide member 44. During normal operation of the car 9, a gap is provided between the operating wedge 47 and the braking member 48 and the car guide rail 11 so as not to interfere with the running of the car 9.

[0050] A plurality of main springs 49 are provided between the lateral movement frame 42 and the braking member 48 .

[0051] The position detector 52 is a device that detects whether the movable guide member 44 is displaced to the normal position. The position detector 52 is, for example, a mechanical switch that outputs an ON signal when the movable guide member 44 is in the normal position and outputs an OFF signal when the movable guide member 44 is displaced from the normal position toward the operating position. The detection signal output from the position detector 52 is sent to the safety monitoring device 6.

[0052] 4. Operations realized in the emergency stop device 20 and the emergency stop operating device 30 The above-described safety device 20 and safety actuator 30 realize the operating operation, the return operation, and the starting operation by utilizing the relative displacement of the car 9 with respect to the car guide rail 11. These operations will be described in detail below.

[0053] 4-1.Operation First, the operating operation of the emergency stop device 20 and the emergency stop operating device 30 will be described. The operating operation is an operation for emergency stopping the car 9 by operating the emergency stop operating device 30 and the emergency stop device 20. Fig. 6 is a front view showing a state immediately after the start of the operating operation of the emergency stop operating device 30 in Fig. 5. When the safety monitoring device 6 generates an operation command signal while the car 9 is descending, the power supply to the hoisting machine 3 is cut off. In addition, the power supply to the actuator 46 is cut off, the movable guide member 44 is displaced to the operating position, and the operating wedge 47 comes into contact with the car guide rail 11.

[0054] 6 is displaced upward relative to the movable guide member 44. When the operating wedge 47 comes into contact with the car guide rail 11, the operating wedge 47 is displaced upward relative to the movable guide member 44 along the guide surface 44a due to the frictional force acting between the operating wedge 47 and the car guide rail 11. As a result, the movable guide member 44 is pushed back toward the normal position against the multiple operating springs 45.

[0055] 7 is displaced further upward relative to the movable guide member 44. After the movable guide member 44 returns to its normal position, when the operating wedge 47 is displaced further upward relative to the movable guide member 44, the lateral movement frame 42 is displaced in a direction in which the braking member 48 comes into contact with the car guide rail 11.

[0056] When the operating wedge 47 is displaced to the upper end of the guide surface 44a after the braking member 48 comes into contact with the car guide rail 11, the lateral movement frame 42 is displaced to the second horizontal position, and the return springs 43 and the main springs 49 are compressed. As a result, the car guide rail 11 is sandwiched between the operating wedge 47 and the braking member 48.

[0057] Fig. 9 is a front view showing the state of the emergency stop operating device 30 when the car 9 is lowered from the state of Fig. 8. When the car 9 is lowered from the state of Fig. 8, the lifting frame 41 is displaced upward from the non-raised position to the lifted position. As a result, the lateral movement frame 42 is also displaced upward, and the lifting rod 32 is lifted.

[0058] In this way, by the movable guide member 44 being displaced to the operating position, the operating wedge 47 comes into contact with the car guide rail 11 and is displaced upward relative to the movable guide member 44 along the guide surface 44a, and the lateral movement frame 42 is displaced horizontally relative to the lifting frame 41. As a result, the car guide rail 11 is sandwiched between the operating wedge 47 and the braking member 48, the multiple main springs 49 are compressed, and the lifting frame 41 is displaced to the lifting position.

[0059] Fig. 10 is a front view showing a state in which the lifting rod 32 in Fig. 2 is lifted. When the lifting rod 32 is lifted, the operating lever 21 and the interlocking lever 22 each rotate, and the emergency stop device 20 is actuated. This brings the car 9 to an emergency stop.

[0060] 4-2.Return operation Next, the return operation of the emergency stop device 20 and the emergency stop actuator 30 after an emergency stop of the car 9 will be described. The return operation is an operation for returning the emergency stop device 20 and the emergency stop actuator 30 after an emergency stop to the standby state before the emergency stop. When the emergency stop device 20 and the emergency stop actuator 30 are caused to perform the return operation, electricity is applied to the actuator 46, and the movable guide member 44 is held in the normal position. Next, the car 9 is raised by the hoist 3 from the state shown in FIG.

[0061] Fig. 11 is a front view showing a state immediately after the start of the return operation of the safety device actuating device 30 in Fig. 9. Since the operating wedge 47 and the braking member 48 sandwich the car guide rail 11, when the fixed frame body 40 rises due to the rise of the car 9, the horizontally moving frame body 42 descends relative to the fixed frame body 40 and the car 9.

[0062] As a result, the lifting rod 32 descends relative to the car 9, the operating lever 21 rotates clockwise in FIG. 10, and the interlocking lever 22 rotates counterclockwise in FIG.

[0063] Fig. 12 is a front view showing the state of the safety device actuating device 30 when the car 9 in Fig. 11 is further raised. When the car 9 is further raised, the lifting frame 41 returns to the non-raised position, the actuating lever 21 and the interlocking lever 22 return to the positions shown in Fig. 2, and the pair of wedge members 27 return from the state shown in Fig. 4 to the state shown in Fig. 3.

[0064] Fig. 13 is a front view showing a state in which the operating wedge 47 in Fig. 12 has been displaced downward. When the car 9 further rises from the state in Fig. 12, a gap is generated between the operating wedge 47 and the car guide rail 11, and the operating wedge 47 falls along the guide surface 44a.

[0065] As a result, each return spring 43 is restored to its original position, the lateral movement frame 42 is returned to the first horizontal position, and the braking member 48 moves away from the car guide rail 11.

[0066] 4-3.Start-up operation Next, there will be described the start-up operation of the emergency stop device 20 and the emergency stop actuating device 30. The start-up operation is an operation for setting the emergency stop device 20 and the emergency stop actuating device 30 to a standby state when the elevator starts up.

[0067] Fig. 14 is a front view showing the state of the emergency stop operating device 30 immediately after the elevator is started. When the elevator is started, the position of the lifting frame 41 is in the non-raised position, so the positions of the operating lever 21 and the interlocking lever 22 are as shown in Fig. 2, and the state of the pair of wedge members 27 is as shown in Fig. 3. In addition, the movable guide member 44 is displaced to the operating position by the biasing force of the multiple operating springs 45, and the operating wedge 47 is in contact with the car guide rail 11. During the start-up operation, electricity is started to be supplied to the actuator 46, but the actuator 46 cannot generate a force that displaces the movable guide member 44 in the operating position to the normal position, so the positions of the movable guide member 44 and the operating wedge 47 do not change.

[0068] Fig. 15 is a front view showing a state in which the operating wedge 47 in Fig. 14 is displaced upward relative to the movable guide member 44. When the car 9 is lowered in the state shown in Fig. 14, the operating wedge 47 is displaced upward relative to the movable guide member 44 along the guide surface 44a due to the frictional force acting between the operating wedge 47 and the car guide rail 11. As a result, the movable guide member 44 is pushed back toward the normal position against the multiple operating springs 45, and is held in the normal position by the actuator 46.

[0069] Fig. 16 is a front view showing a state in which the operating wedge 47 in Fig. 15 is displaced downward. When the car 9 is raised from the state in Fig. 15, a gap is generated between the operating wedge 47 and the car guide rail 11, and the operating wedge 47 falls along the guide surface 44a. As a result, the safety device 20 and the safety actuator 30 are set to the standby state.

[0070] In such an elevator emergency stop operating device 30, a movable guide member 44, a plurality of operating springs 45, an actuator 46, an operating wedge 47, a braking member 48, and a main spring 49 are provided on a lateral movement frame 42. The lateral movement frame 42 is capable of being displaced in the horizontal direction.

[0071] Therefore, during the return operation, by raising the car 9, the operating wedge 47 is dropped, the lateral movement frame body 42 is returned to the first horizontal position, and the braking member 48 can be separated from the car guide rail 11. This makes it possible to reduce the driving force and movable range required for the actuator 46, and the capacity of the actuator 46 can be reduced.

[0072] Furthermore, since the lateral movement frame 42 is displaceable in the horizontal direction, the safety device 20 can be stably operated even if the distance between the normal position and the operating position varies.

[0073] Further, the car 9 is provided with a fixed frame body 40. The fixed frame body 40 guides the upward and downward displacement of the lifting frame body 41. Therefore, the lifting frame body 41 can be stably displaced between the non-raised position and the lifted position, and the safety device 20 can be stably operated.

[0074] Furthermore, during the start-up operation, by lowering the car 9, the frictional force acting between the operating wedge 47 and the car guide rail 11 displaces the operating wedge 47 upward along the guide surface 44a relative to the movable guide member 44, thereby pushing the movable guide member 44 back to the normal position. This makes it possible to reduce the driving force and movable range required for the actuator 46.

[0075] 5. Features of the Safety System of the Embodiment In the emergency stop operating device 30, the frictional force between the operating wedge 47 and the car guide rail 11 may decrease due to factors such as deterioration of parts or adhesion of oil to the car guide rail 11. In this case, there is a risk that the descent distance of the car 9 required for the start-up operation will increase or the start-up may fail. If such a condition is left unattended, there is a risk that the deterioration of the device will progress, so it is necessary to detect it early and take measures.

[0076] The safety system of this embodiment is characterized by an operation for detecting an abnormal operation during a start-up operation. The configuration and operation of the safety system will be described below.

[0077] Fig. 17 is a diagram showing the configuration of an elevator safety system according to an embodiment. The safety system mainly comprises a position detection device 52, an operation state detection device 50, a car movement amount detection device 13, a safety monitoring device 6, an elevator control device 5, an emergency stop operating device 30, and an emergency stop device 20. The safety monitoring device 6 comprises a power supply control unit 61, a movement distance calculation unit 62, a position detection unit 63, an abnormality determination unit 64, and a signal output unit 65 as functional blocks that perform processing to realize various functions.

[0078] The power supply control unit 61 is a functional block for controlling the power supply to the actuator 46 of the safety device actuating device 30 .

[0079] The movement distance calculation unit 62 is a functional block for calculating the movement distance of the car 9 based on the detection signal output from the car movement amount detection device 13. This processing is hereinafter referred to as "movement distance calculation processing".

[0080] The position detection unit 63 is a functional block for detecting that the movable guiding member 44 has been displaced to the normal position based on the detection signal output from the position detection device 52. This process will be referred to as "position detection process" hereinafter.

[0081] The abnormality determination unit 64 is a functional block for determining whether or not there is an operational abnormality during the startup operation. Typically, the abnormality determination unit 64 determines that there is an operational abnormality when the downward movement distance of the car 9 during the startup operation exceeds a threshold value. This process is hereinafter referred to as "abnormality determination process." The threshold value here is the limit value of the downward movement distance of the car 9 permitted during the startup operation, and a predetermined value is used.

[0082] The signal output unit 65 is a functional block for outputting various signals. Examples of signals output from the signal output unit 65 include an abnormality detection signal indicating an operation abnormality during a startup operation, a signal for instructing the car 9 to travel, a signal for supplying power to the actuator 46, and the like.

[0083] The safety monitoring device 6 executes the startup operation according to the following flowchart to determine whether or not there is an operational abnormality during the startup operation. Figure 18 is a flowchart showing a control routine for the startup operation executed in the safety system according to the embodiment. The routine shown in Figure 18 is executed by the safety monitoring device 6 when the elevator is started up.

[0084] In step S100, it is determined whether or not a non-operating state of the emergency stop device 20 has been detected. Here, it is determined whether or not an OFF signal indicating a non-operating state of the emergency stop device 20 has been transmitted from the operation state detection device 50. As a result, if the emergency stop device 20 is in an inoperating state, it is determined that the elevator is starting up, and the process proceeds to step S102. On the other hand, if the emergency stop device 20 is in an operating state, it is determined that it is not in a normal state at the time of starting up, and the process proceeds to step S116.

[0085] In step S102, the power supply control unit 61 supplies power to the actuator 46, and the process proceeds to step S104. In step S104, the movement distance calculation unit 62 starts a movement distance calculation process, and starts calculating the movement distance of the car 9 from the current time. After the process of step S104 is performed, the process proceeds to step S106.

[0086] In step S106, a command for slow-speed down travel to lower the car 9 at a specified distance at a slow speed is output to the elevator control device 5. In response to the command for slow-speed down travel, the elevator control device 5 controls the hoist 3 to lower the car 9. After the processing of step S106 has been performed, the processing proceeds to step S108.

[0087] In step S108, the position detection unit 63 executes a position detection process to determine whether the movable guide member 44 has been displaced to the normal position. If the determination is affirmative, the process proceeds to step S112, and if the determination is negative, the process proceeds to step S110.

[0088] In step S110, the abnormality determination unit 64 executes an abnormality determination process to determine whether the movement distance calculated by the movement distance calculation process exceeds a threshold value. If the determination is affirmative, it is determined that an abnormal operation has occurred, and the process proceeds to step S116. In step S116, an abnormality detection signal is output from the signal output unit 65 to the elevator control device 5. Upon receiving the abnormality detection signal, the elevator control device 5 controls the brake of the hoisting machine 3 to bring the car 9 to an emergency stop. When the process of step S116 is performed, the process of this routine is terminated. On the other hand, if the determination of step S110 is negative, the process returns to the process of step S106 again.

[0089] In step S112, a command for slow-speed up-travel is output to the elevator control device 5, which causes the car 9 to rise a specified distance at a slow speed. In response to the command for slow-speed up-travel, the elevator control device 5 controls the hoist 3 to raise the car 9. As a result, a gap is generated between the operating wedge 47 and the car guide rail 11, and the operating wedge 47 falls along the guide surface 44a. As a result, the emergency stop device 20 and the emergency stop operating device 30 are set to a standby state. After the process of step S112 is performed, the process proceeds to step S114. In step S114, a start-up operation completion signal indicating the completion of the start-up operation is output to the elevator control device 5. Upon receiving the start-up operation completion signal, the elevator control device 5 starts normal travel. After the process of step S114 is performed, the process of this routine ends.

[0090] According to the above-described start-up operation, an operational abnormality during the start-up operation can be detected and the car 9 can be brought to an emergency stop. This makes it possible to prevent deterioration of the emergency stop operating device 30 and also allows the start-up operation to be completed without the presence of an operator.

[0091] 6. Modifications of the embodiment The elevator safety system according to the embodiment may be modified as follows.

[0092] 6-1. Hardware resources of safety monitoring device 6 19 is a diagram showing an example of hardware resources of a safety monitoring device. The safety monitoring device 6 includes, as hardware resources, a processing circuit 74 including a processor 70 and a memory 72. The processing circuit 74 may include multiple processors 70. The processing circuit 74 may include multiple memories 72.

[0093] In this embodiment, the functions of the safety monitoring device 6 can be realized by software written as a program, firmware, or a combination of software and firmware. The program is stored in the memory 72. The safety monitoring device 6 realizes each function by executing the program stored in the memory 72 by a processor 70 (computer).

[0094] The processor 70 is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory 72 may be a semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, or a DVD. Possible semiconductor memories include RAM, ROM, flash memory, EPROM, and EEPROM.

[0095] Fig. 20 is a diagram showing another example of hardware resources of a safety monitoring device. In the example shown in Fig. 20, the safety monitoring device 6 includes a processing circuit 78 including, for example, a processor 70, a memory 72, and dedicated hardware 76. Fig. 20 shows an example in which a part of the functions of the safety monitoring device 6 is realized by the dedicated hardware 76. All of the functions of the safety monitoring device 6 may be realized by the dedicated hardware 76. As the dedicated hardware 76, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination of these can be adopted.

[0096] 6-2. Position detection device 52 The position detector 52 is not limited in its location and in the configuration of the detection means as long as it is configured to be able to detect that the movable guide member 44 has been displaced to the normal position.

[0097] 6-3. Operation state detection device 50 There are no limitations on the arrangement of the activation state detection device 50 and the configuration of the detection means, so long as it is configured to be able to detect whether the safety device 20 is in an activated state or a non-activated state.

[0098] 6-4. Safety monitoring device 6 Furthermore, the safety monitoring device 6 may monitor only either the excessive speed of the car 9 or the excessive acceleration of the car 9 .

[0099] A part or all of the processing performed in the safety monitoring device 6 may be performed in the elevator control device 5.

[0100] The slow speed down command output in step S106 of the routine shown in Fig. 18 may be a command to continue traveling without setting the travel distance to a specified distance. In this case, if the determination is not established in the abnormality determination process in step S110, the process may proceed to step S108.

[0101] 6-5. Emergency stop operating device 30 The connection point of the lifting rod 32 to the actuator body 31 is not limited to the lateral movement frame 42. For example, the upper end of the lifting rod 32 may be rotatably connected to the movable guide member 44. Alternatively, the upper end of the lifting rod 32 may be rotatably connected to the brake member 48.

[0102] 6-6. Elevator The layout of the entire elevator is not limited to the layout in Figure 1. For example, the roping method may be a 2:1 roping method.

[0103] The elevator may be a machine room-less elevator, a double deck elevator, a one-shaft multi-car elevator, etc. In the one-shaft multi-car elevator, an upper car and a lower car located directly below the upper car each independently ascend and descend in a common elevator shaft.

[0104] 7.Other Although the preferred embodiments have been described in detail above, the present disclosure is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

[0105] Various aspects of the present disclosure are summarized below as appendices.

[0106] (Appendix 1) An emergency stop device that stops the elevator car as it moves up and down along the guide rail; an emergency stop operating device comprising: a movable guide member displaceable between an operating position and a normal position; an operating spring that urges the movable guide member toward the operating position; and an actuator that receives power and holds the movable guide member at the normal position against the operating spring, the emergency stop operating device operating the emergency stop device when the power supply to the actuator is cut off and the movable guide member is displaced to the operating position; a safety monitoring device that cuts off the supply of power to the actuator when abnormal traveling of the car is detected, When the elevator is started, the emergency stop operating device is configured to displace the movable guide member from the operating position to the normal position based on a force received from the guide rail by a start-up operation including a lowering of the car, The safety monitoring device includes: When the descending distance of the car exceeds a threshold value before the movable guide member is displaced to the normal position by the activation operation, an abnormality detection signal is output. 4. An elevator safety system comprising: (Appendix 2) 2. The elevator safety system of claim 1, wherein the safety monitoring device is configured to supply the power to the actuator when the elevator starts up. (Appendix 3) a travel control device that controls the travel of the car in accordance with an operation command output from the safety monitoring device; a position detection device for detecting a normal state in which the movable guide member is displaced to the normal position, When the elevator is started, the safety monitoring device outputs an operation command to the travel control device to lower the car until the position detection device detects the normal state, and when the position detection device detects the normal state, outputs an operation command to the travel control device to temporarily raise the car and then stop it. 3. The elevator safety system according to claim 1 or 2, configured as follows: (Appendix 4) The elevator safety system of claim 3, wherein the travel control device is configured to emergency stop the car upon receiving the abnormality detection signal. (Appendix 5) 4. The elevator safety system of claim 1, wherein the safety monitoring device is configured to detect the abnormal running of the car when the speed or acceleration of the car reaches a judgment value. (Appendix 6) The emergency stop operating device is a lifting frame that is displaceable in the vertical direction between a non-raised position and a lifting position that is a position higher than the non-raised position and that is displaceable from the non-raised position to the lifting position; A transmission mechanism that transmits a vertical displacement of the lifting frame relative to the car to the safety device and activates the safety device; a lateral movement frame provided on the lifting frame so as to be displaceable in a horizontal direction relative to the lifting frame between a first horizontal position and a second horizontal position; a return spring provided between the lifting frame and the lateral movement frame for generating a force for returning the lateral movement frame to the first horizontal position; the movable guide member has a guide surface that faces the guide rail and is inclined with respect to the guide rail so as to approach the guide rail as it goes upward, and is provided on the lateral movement frame so as to be displaceable in a horizontal direction with respect to the lateral movement frame between the normal position and the operating position, The operating spring is provided between the lateral movement frame and the movable guide member, The emergency stop operating device is an operating wedge provided between the movable guide member and the guide rail, the operating wedge being displaceable in a vertical direction relative to the movable guide member along the guide surface; a braking member provided on the lateral movement frame and facing the guide rail on an opposite side of the guide rail from the movable guide member; a main spring provided between the lateral movement frame and the braking member, The elevator safety system described in any one of Appendix 1 to Appendix 5 is configured such that, when the movable guide member is displaced to the operating position, the operating wedge contacts the guide rail and displaces upward relative to the movable guide member along the guide surface, the lateral movement frame body displaces horizontally relative to the lifting frame body, the guide rail is sandwiched between the operating wedge and the braking member, the main spring is compressed, and the lifting frame body is displaced to the lifting position. (Appendix 7) 7. The elevator safety system of claim 6, further comprising a fixed frame provided on the car to guide the upward and downward displacement of the lifting frame. (Appendix 8) 8. The elevator safety system according to claim 6 or 7, wherein the transmission mechanism is connected between the lateral movement frame and the emergency stop device. [Explanation of symbols]

[0107] 1 elevator shaft, 2 machine room, 3 hoist, 4 deflector, 5 elevator control device, 6 safety monitoring device, 7 drive sheave, 8 suspension body, 11 car guide rail, 12 counterweight guide rail, 13 car movement amount detection device, 20 emergency stop device, 21 operating lever, 21a operating lever shaft, 22 interlocking lever, 22a interlocking lever shaft, 23 connecting rod, 24 emergency stop frame, 25 wedge guide, 27 wedge member, 28 wedge connecting link, 30 emergency stop operating device, 31 operating device body, 32 lifting rod, 40 fixed frame body, 41 lifting frame body, 42 lateral movement frame body, 44 movable guide member, 44a guide surface, 46 actuator, 47 Operating wedge, 48 braking member, 50 operating state detection device, 52 position detection device, 61 power supply control unit, 62 moving distance calculation unit, 63 position detection unit, 64 abnormality determination unit, 65 signal output unit, 70 processor, 72 memory, 74 processing circuit, 76 dedicated hardware, 78 processing circuit

Claims

1. An emergency stop device that stops the elevator car as it moves up and down along the guide rail; an emergency stop operating device comprising: a movable guide member displaceable between an operating position and a normal position; an operating spring that urges the movable guide member toward the operating position; and an actuator that receives power and holds the movable guide member at the normal position against the operating spring, the emergency stop operating device operating the emergency stop device when the power supply to the actuator is cut off and the movable guide member is displaced to the operating position; a safety monitoring device that cuts off the supply of power to the actuator when abnormal traveling of the car is detected, When the elevator is started, the emergency stop operating device is configured to displace the movable guide member from the operating position to the normal position based on a force received from the guide rail by a start-up operation including a lowering of the car, The safety monitoring device includes: When the descending distance of the car exceeds a threshold value before the movable guide member is displaced to the normal position by the activation operation, an abnormality detection signal is output.

4. An elevator safety system comprising:

2. 2. The elevator safety system of claim 1, wherein the safety monitor is configured to supply the power to the actuator upon startup of the elevator.

3. a travel control device that controls the travel of the car in accordance with an operation command output from the safety monitoring device; a position detection device for detecting a normal state in which the movable guide member is displaced to the normal position, When the elevator is started, the safety monitoring device outputs an operation command to the travel control device to lower the car until the position detection device detects the normal state, and when the position detection device detects the normal state, outputs an operation command to the travel control device to temporarily raise the car and then stop it.

3. The elevator safety system according to claim 1 or 2, which is configured as follows.

4. 4. The elevator safety system according to claim 3, wherein the travel control device is configured to receive the abnormality detection signal and bring the car to an emergency stop.

5. 3. The elevator safety system according to claim 1, wherein the safety monitoring device is configured to detect the abnormal running of the car when the speed or acceleration of the car reaches a judgment value.

6. The emergency stop operating device is a lifting frame that is displaceable in the vertical direction between a non-raised position and a lifting position that is a position higher than the non-raised position and that is displaceable from the non-raised position to the lifting position; A transmission mechanism that transmits a vertical displacement of the lifting frame relative to the car to the safety device and activates the safety device; a lateral movement frame provided on the lifting frame so as to be displaceable in a horizontal direction relative to the lifting frame between a first horizontal position and a second horizontal position; a return spring provided between the lifting frame and the lateral movement frame for generating a force for returning the lateral movement frame to the first horizontal position; the movable guide member has a guide surface that faces the guide rail and is inclined with respect to the guide rail so as to approach the guide rail as it goes upward, and is provided on the lateral movement frame so as to be displaceable in a horizontal direction with respect to the lateral movement frame between the normal position and the operating position, The operating spring is provided between the lateral movement frame and the movable guide member, The emergency stop operating device is an operating wedge provided between the movable guide member and the guide rail, the operating wedge being displaceable in a vertical direction relative to the movable guide member along the guide surface; a braking member provided on the lateral movement frame and facing the guide rail on an opposite side of the guide rail from the movable guide member; a main spring provided between the lateral movement frame and the braking member, 3. The elevator safety system of claim 1 or claim 2, wherein, when the movable guide member is displaced to the operating position, the operating wedge contacts the guide rail and displaces upward relative to the movable guide member along the guide surface, the lateral movement frame displaces horizontally relative to the lifting frame, the guide rail is sandwiched between the operating wedge and the braking member, the main spring is compressed, and the lifting frame is displaced to the lifting position.

7. 7. The elevator safety system according to claim 6, further comprising a fixed frame provided on the car for guiding the upward and downward displacement of the lifting frame.

8. 7. The elevator safety system according to claim 6, wherein the transmission mechanism is connected between the lateral movement frame and the safety device.

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