JP4957457B2 - Elevator rope roll detection device - Google Patents

Description

  The present invention relates to an elevator rope roll detection apparatus that estimates and calculates the lateral vibration of an elevator rope caused by a slow roll of a building caused by an earthquake or strong wind.

  In the conventional elevator, the acceleration level of the building transverse vibration is set according to the height of the building for the accelerometer provided in the machine room, and when the set value is exceeded, the system shifts to control operation. . In this case, when a high-rise building continues to shake slowly at the primary natural frequency due to long-period earthquakes or strong winds, the acceleration level in the elevator machine room is small and the accelerometer does not reach the operating level, but the rope is Resonating with the roll of the motor, the amplitude becomes large, and there is a possibility of causing damage to the equipment due to contact with equipment in the hoistway. As a prior art to solve this problem, it consists of a wave energy sensor and an elevator unit control device. From the wave energy sensor, a strong wind signal indicating that a strong wind has been detected and a plurality of signals indicating the level are controlled by the unit. An elevator strong wind control operation method is known in which the unit control device performs control operation such as deceleration operation, standby on the intermediate floor or stop according to each strong wind level based on those signals. For example, see Patent Document 1).

JP-A-5-319720

  Although the conventional strong wind control system of elevators can capture slow shaking of the building, there is no basis for setting the detection level of the wave energy sensor, and how much the elevator rope is shaking There was a problem that I could not.

  The present invention has been made to solve the above-described problems, and provides an elevator roll roll detecting device having a self-test circuit for determining whether or not a self-test can be executed according to a building shake detection level. It is for the purpose.

The elevator roll roll detection device according to the present invention is an elevator rope roll detection device that detects an amount of roll roll caused by a slow swing of a building caused by a long-period earthquake, strong wind, etc. The detection device has the maximum stop time required for the elevator to stop at the nearest floor, the minimum allowable run-out amount that is the minimum distance until the rope in the hoistway contacts the equipment in the hoistway, and the primary natural period of the building. Using the first rope roll detection means having an acceleration level calculation unit for calculating the first acceleration level of the earthquake acceleration using the forced displacement amount from the building applied to the rope, the duration of the vibration, and the natural frequency of the building Second rope roll detecting means having a rope lateral amplitude calculating section for estimating and calculating the amount of rope roll, the first rope roll detecting means and the second rope A shake detecting means and a selectable operating mode selecting means, the self-test circuit having a self test selection switches, as well as determining the self-test execution determination in accordance with the building sway detection level, simulatively the detection signal of the earthquake acceleration And self-diagnosis means for generating and confirming the operation of the rope sway detector .

  According to the present invention, since the self-test is not executed in the state in which the building shake of a level slightly exceeding the LVO detection level for shifting to the control operation monitoring mode when the rope shake is small, the accelerometer failure is detected. This has the effect of preventing misdiagnosis.

First, the technology of the prior application which is the premise of the present invention will be described as a reference example.
Reference Example 1.
FIG. 1 is a block diagram showing an elevator control device using an elevator rope roll detection device according to a first embodiment of the present invention, and FIG. 2 is a diagram showing the relationship between building displacement and rope lateral amplitude in a general elevator. FIG. 3 is an explanatory view showing the relationship between the building displacement and the rope lateral amplitude, which is the basic principle of the first detecting means of the elevator roll roll detecting device as Reference Example 1 of the present invention, and FIG. FIG. 5 is a flowchart for explaining the control operation using the first detection means of the elevator roll roll detection device which is the first reference example of the elevator. FIG. 5 is a first detection means for the elevator which is the first reference example of the present invention. FIG. 6 is an explanatory diagram showing an example of the control operation operation by the vehicle in relation to the building acceleration and the rope lateral amplitude. FIG. 6 shows the basics of the second detecting means of the elevator roll roll detecting device according to the first embodiment of the present invention. FIG. 7 is an explanatory view showing the rolling of the rope caused by the slow rolling of the building, which is the reason, and FIG. 7 is the building which is the basic principle of the second detection means of the rope rolling detection device of the elevator which is Reference Example 1 of the present invention. FIG. 8 is an explanatory diagram showing the relationship between the displacement and the rope lateral amplitude, FIG. 8 is an explanatory diagram showing the relationship between the envelope of the building displacement and the rope lateral amplitude when the building amplitude is constant, and FIG. 9 is the building displacement at the building amplitude that varies with time. FIG. 10 is a diagram illustrating the process of calculating the level value of the control operation by the second detection means of the elevator roll roll detection device according to the first embodiment of the present invention. FIG. 11 is a flow chart for explaining an example of control operation using the second detecting means of the elevator roll roll detecting device which is Reference Example 1 of the present invention.

  In FIG. 1, reference numeral 1 denotes an elevator control device, which includes a CPU 2 and a storage device 3. The CPU 2 includes a first rope roll detection means comprising an acceleration level calculation unit 4 and a comparator 5, and a second rope roll detection comprising a timer 6, a building average amplitude calculation unit 7 and a rope roll amplitude calculation unit 8. And a control operation pattern selection unit 9. In addition, the storage device 3 includes a first parameter for the first rope roll detection means including a minimum allowable shake amount 10, a building natural vibration period 11 and a maximum stop time 12, a car position 13, a building natural frequency. 14 and the second parameter for the second rope roll detecting means comprising the rope information 15 is stored. 16 is an operation mode selection switch for selectively selecting the output of the first rope roll detection means and the output of the second rope roll detection means, and 17 is an accelerometer installed in an elevator machine room of the building. The acceleration information is sent to the comparator 5 of the CPU 2, the timer 6, and the average amplitude calculator 7 of the building. When a building acceleration exceeding a certain level is detected, the timer 6 starts its operation and sends the building shaking duration time to the building average amplitude calculation unit 7 and the rope lateral amplitude calculation unit 8.

一方、建物に設置した加速度計１７からの信号は（ステップＳ２）、建物の１次固有振動数付近のみを取り出すように、バンドパスフィルタをかけて（ステップＳ３）、エレベータの制御装置１に出力される。
そして、ステップＳ３で得られた建物の加速度信号を、第１の加速度レベルと比較する第１の比較器５ａを設ける。仮に建物加速度が第１の加速度レベルを超えたとしても、建物振動が単発的な揺れで、すぐに振動が収まることがある。その場合、ロープの横揺れは図２のように増大することはない。そこで、第１の比較器５ａでは、図５に示すように、建物加速度が複数回（回数Ｎで、Ｎは２以上である）、第１の加速度レベルを超えると、建物揺れが長時間に渡って持続すると考えて発報する。そのため、第１の比較器５ａの内部には、カウンタが付加的に設けられている（ステップＳ４）。
一方、単発的な建物揺れであっても、その揺れがある程度大きくなると、ロープ揺れに対して影響を与え、ロープ揺れが大きくなる。そこで、第１の加速度を少なくとも２倍したものを第２の加速度レベルとし（ステップＳ５）、建物加速度と比較する第２の比較器５ｂを設ける。この場合、建物加速度が第２の加速度レベルを超えた瞬間に発報させるため、第２の比較器５ｂにはカウンタを設けない（ステップＳ６）。
第１の比較器５ａと第２の比較器５ｂの出力をＯＲ回路に渡し（ステップＳ７）、いずれかが発報している場合は、長周期振動の管制運転に移行し、エレベータを最寄階に停止させる（ステップＳ８、Ｓ９）。一方、どちらも発報していない場合は、通常運転を継続する（ステップＳ８、Ｓ１０）。
図５の場合、１周期Ｔの間に、３回超えたら発報するとしており、監視時間ｔを周期Ｔのｎ倍とすれば、ｔ = Ｔ×ｎの時間内に、少なくとも２Ｎ回以上、第１の加速度レベルを超えるとした場合、持続的に建物振動が発生していると考えることができる。
なお、監視時間ｔを長く取り過ぎると、ロープの揺れが成長してしまう可能性がある。そこで、ｔは、最寄階に停止するまでに要する最大の時間以下であることが望ましい。

On the other hand, the signal from the accelerometer 17 installed in the building (step S2) is output to the elevator control device 1 by applying a band-pass filter (step S3) so as to extract only the vicinity of the primary natural frequency of the building (step S3). Is done.
And the 1st comparator 5a which compares the acceleration signal of the building obtained by step S3 with a 1st acceleration level is provided. Even if the building acceleration exceeds the first acceleration level, the building vibration may be a single vibration, and the vibration may immediately stop. In that case, the roll of the rope does not increase as shown in FIG. Therefore, in the first comparator 5a, as shown in FIG. 5, when the building acceleration exceeds the first acceleration level a plurality of times (N times is 2 or more), the building shakes for a long time. It is reported that it will last for a long time. Therefore, a counter is additionally provided in the first comparator 5a (step S4).
On the other hand, even if it is a single building swing, if the swing increases to some extent, it affects the rope swing and the rope swing increases. Therefore, a second comparator 5b that compares at least twice the first acceleration with the second acceleration level (step S5) and compares with the building acceleration is provided. In this case, the second comparator 5b is not provided with a counter in order to make a report at the moment when the building acceleration exceeds the second acceleration level (step S6).
The outputs of the first comparator 5a and the second comparator 5b are passed to the OR circuit (step S7). If any of them is reporting, the control shifts to the long-period vibration control operation, and the elevator is the closest. Stop at the floor (steps S8, S9). On the other hand, if neither is issued, normal operation is continued (steps S8 and S10).
In the case of FIG. 5, if it exceeds 3 times during one period T, if the monitoring time t is n times the period T, at least 2N times or more within the time of t = T × n, If the first acceleration level is exceeded, it can be considered that building vibration is continuously generated.
If the monitoring time t is set too long, the rope swing may grow. Therefore, t is preferably equal to or less than the maximum time required to stop at the nearest floor.

  Note that the first acceleration level and the second acceleration level set above are lower than the acceleration value of the low sensing operation set by the conventional earthquake detector. For this reason, in the case of a large earthquake in which low detection operates, the operation shifts to normal seismic control operation instead of long-period vibration control operation. In this case, the long-period vibration control operation function continues to operate independently of normal seismic control operation. Then, even after the automatic resetting of the low-sensing operation or the manual resetting of the high-sensing operation, you can monitor that the building continues to shake, and the rope is not in the normal seismic detector. It is possible to prevent the rope vibration from increasing due to resonance with the vibration.

  Furthermore, it is conceivable to provide a 0th acceleration level lower than the first acceleration level, and continue driving at a reduced speed. Specifically, α in FIG. 5 is set to a value smaller than the value at the time of setting the first acceleration level, for example, a half value. In this case, although there is a relatively small rope swing that does not cause the rope to catch, the traveling speed is reduced, so even if a malfunction occurs during traveling due to the rope swing, the elevator is quickly stopped, Safety can be ensured.

以上より、（６）式あるいは（８）式を用いて、ロープの横振幅を求めることができる。こうして得られたロープ横振幅を用いることにより、図１に示すエレベータのロープ横揺れ検出装置の第２の検出手段を用いた制御装置の構成で、図１１に示す管制運転を行うことができる。 Next, the second rope roll detection means will be described.
The lateral amplitude of the rope generated by the slow rolling of the building will be described with reference to FIG.
In FIG. 6, 18 is a hoistway provided in a building, 19 is an elevator car, 20 is a hoisting machine provided in an elevator machine room, 21 is a main rope wound around the hoisting machine 20, and a car 19 Connect a counterweight (not shown). Reference numeral 22 denotes a balancing rope that connects the car 19 and a counterweight (not shown). 23 is a governor rope, and 24 is a control cable.

From the above, the lateral amplitude of the rope can be obtained using the equation (6) or (8). By using the rope lateral amplitude obtained in this way, the control operation shown in FIG. 11 can be performed with the configuration of the control device using the second detecting means of the elevator roll roll detecting device shown in FIG.

  According to the reference example 1, by configuring the output of the first rope roll detecting means and the output of the second rope roll detecting means to be mutually selectable by the operation mode selection switch 16, two types of ropes can be selected. The shake detection means can be realized by software, and the hardware configuration can be shared.

  In the reference example 1, the output of the first rope roll detecting means and the output of the second rope roll detecting means are configured to be selectable with each other by the operation mode selection switch 16, but the first rope roll detecting means is selected. You may make it guide | lead a 2nd rope roll detection means using the 1st acceleration level which is a detection result of a detection means.

  In the reference example 1, the output of the first rope roll detecting means and the output of the second rope roll detecting means are configured to be selectable with each other by the operation mode selection switch 16, but the first rope roll detecting means is selected. You may make it take AND conditions about the detection result of a detection means, and the detection result of a 2nd rope roll detection means. Thereby, the reliability of detection accuracy can be increased by making the detection means redundant.

  Further, the first parameter for the first rope roll detection means comprising the minimum allowable shake amount 10, the building natural vibration period 11 and the maximum stop time 12 stored in the storage device 3, the car position 13, the building natural vibration. You may enable it to perform the setting of the 2nd parameter for the 2nd rope roll detection means which consists of Formula 14 and rope information 15 from the application on a personal computer. Thereby, the detection level of rope roll can be freely set or adjusted according to the construction property of the building.

  According to this reference example 2, an operation confirmation test at an earthquake detection level, that is, an acceleration sensor level can be easily performed independently of an elevator system evaluation test, so that a large-scale and expensive shaker is unnecessary. It can be.

Reference Example 3.
FIG. 13 is a block configuration diagram showing an elevator control device using an elevator rope roll detection device according to a third embodiment of the present invention, and shows a modification of the second embodiment.
In this reference example 3, the self-test signal itself from the self-test circuit 30 is not passed through the accelerometer 17 and the self-test switch 31 is switched to the self-test circuit 30 side, so that the seismic acceleration detection signal can be used as the seismic acceleration detection signal. It is a modification in the case of generating in simulation. The self test circuit 30 may be built in the CPU 2.

Embodiment 1.
FIG. 14 is a block configuration diagram showing an elevator control apparatus using the elevator rope roll detection apparatus according to Embodiment 1 of the present invention, and FIG. 15 is an elevator rope roll detection apparatus according to Embodiment 1 of the present invention. FIG. 16 is a flowchart for explaining the self-test operation of the elevator roll roll detecting device in the first embodiment of the present invention.

In FIG. 14, 41 is a rope roll detection device that is a part of the elevator control device, and 42 is an accelerometer that is a detection sensor unit of the rope roll detection device 41. The rope roll detection device 41 further includes a self-test circuit 43, a self-test execution switch 44, a self-test selection switch 45, and a self-diagnosis device 46. The accelerometer 42 may be provided in the rope roll detection device 41. The self-test circuit 43 includes a command unit 47, a determination unit 48, a comparison unit 49, and a failure diagnosis unit 50.
The building acceleration information from the accelerometer 42 is used as a self-test mode process when a self-test signal is received from the self-test circuit 43, and is used as a measurement mode process when no self-test signal is received. The building acceleration information may be a vector composite value of a horizontal biaxial accelerometer. When the command unit 47 receives a self test signal generated from a push button or the like, the command unit 47 sends the self test signal to the accelerometer 42 via the self test execution switch 44 that is opened and closed according to the determination result from the determination unit 48. The determination unit 48 controls the opening / closing of the self test execution switch 44 based on the comparison result of the comparator 49 with respect to the switching state of the self test selection switch 45 or the detected acceleration (building acceleration information) from the accelerometer 42. Further, the comparator 49 compares the threshold with the threshold set as the LVO detection level (monitoring mode). The failure diagnosis unit 50 performs failure diagnosis on the detected acceleration when the self test is executed, and sends failure information to the self-diagnosis device 46 if an abnormality is confirmed. Thereby, since the self-test is not executed in the state in which the building shake that slightly exceeds the LVO detection level is detected, it is possible to prevent a misdiagnosis that causes an accelerometer failure.

Next, the self-test function and its self-test operation of the elevator roll roll detecting device will be described with reference to FIGS.
In FIG. 15, 51 is a self-test command, 52 is a power-on command, 53 is an OR condition, 54 is a judgment condition (Lv> LO) at the time of building roll detection, 55 is a process for disabling self-test, 56 is Judgment conditions (Lv ≦ LO) when no building roll is detected, 57 is a process for executing a self test, and 58 is a process for skipping the self test. The self-test command 51 is generated from a push button or the like, and is sent to the building roll detection level determination condition at the subsequent stage according to the OR condition 53 with the power activation command 52 when the self-test selection switch 45 is in the ON state. If the building vibration at this time exceeds the LVO detection level, the determination condition 54 is satisfied, and the self-test cannot be executed in processing 55. If the building vibration at this time falls below the LVO detection level, the determination condition 56 is satisfied, and the self-test is executed in processing 57. Further, the power activation command 52 when the self test selection switch 45 is in the OFF state is sent to the self test skip process 58 in which the execution of the self test is omitted.
This will be described with reference to the flowchart of FIG. 16. In step S31, the power is turned on, the CPU is initialized in step S32, and the self-test selection switch 45 is turned on in step S33. In step S34, the building roll detection level is determined. If the building roll vibration exceeds the LVO detection level (Lv> LO), the self test cannot be executed (step S35). If the building roll vibration is below the LVO detection level in step S34 (Lv ≦ LO), a self test is executed (step S36), and if there is no abnormality in step S37, a relay test is executed (step S38). In step S39, it is determined whether there is an abnormality. If the self test selection switch 45 is OFF in step S33, the self test is skipped in step S40 and the process proceeds to step S38. Further, step 41 is a measurement mode, and there are cases where the process proceeds from step S35 and the process proceeds from no abnormality in step S39. In step S42, the presence / absence of the self-test command 51 is determined. If yes, the process returns to step S34, and if not, the process returns to step S41. If there is an abnormality in step S36 and there is an abnormality in step S39, a failure is reported (step S43).
As a result, whether or not the self-test is executed when the power is turned on can be selected by the self-test selection switch 45. Therefore, the rope roll detection device 41 cannot be restarted under the condition that the building shake exceeds the LVO detection level. It can be avoided and does not interfere with or interrupt the elevator maintenance.

It is a block block diagram which shows the control apparatus of the elevator using the elevator rope rolling detection apparatus which is the reference example 1 of this invention. It is explanatory drawing which shows the relationship between the building displacement in a general elevator, and rope lateral amplitude. It is explanatory drawing which shows the relationship between the building displacement and rope lateral amplitude which are the basic principles of the 1st detection means of the rope roll rolling detector of the elevator which is the reference example 1 of this invention. It is a flowchart for demonstrating the control operation operation | movement using the 1st detection means of the rope roll rolling detector of the elevator which is the reference example 1 of this invention. It is explanatory drawing which shows an example of the control operation operation | movement by the 1st detection means of the elevator which is the reference example 1 of this invention by the relationship between a building acceleration and a rope lateral amplitude. It is explanatory drawing which shows the roll of the rope which arises by the slow roll of the building which is the basic principle of the 2nd detection means of the rope roll detection apparatus of the elevator which is the reference example 1 of this invention. It is explanatory drawing which shows the relationship between the building displacement and rope lateral amplitude which are the basic principles of the 2nd detection means of the rope roll rolling detector of the elevator which is the reference example 1 of this invention. It is explanatory drawing which shows the relationship between the envelope of a building displacement in case a building amplitude is constant, and rope lateral amplitude. It is explanatory drawing which shows the relationship between the envelope of a building displacement in the building amplitude which changes with time, and rope lateral amplitude. It is a block diagram which shows the process of calculating the level value of the control operation by the 2nd detection means of the rope roll rolling detector of the elevator which is the reference example 1 of this invention. It is a flowchart for demonstrating the example of control operation using the 2nd detection means of the rope roll rolling detector of the elevator which is the reference example 1 of this invention. It is a block block diagram which shows the control apparatus of the elevator using the elevator roll roll detection apparatus which is the reference example 2 of this invention. It is a block block diagram which shows the control apparatus of the elevator using the rope roll rolling detection apparatus of the elevator which is the reference example 3 of this invention. It is a block block diagram which shows the control apparatus of the elevator using the elevator rope roll rolling detection apparatus in Embodiment 1 of this invention. It is explanatory drawing which shows the self-test function of the rope roll rolling detector of the elevator in Embodiment 1 of this invention. It is a flowchart for demonstrating the self-test operation | movement of the rope roll-rolling detection apparatus of the elevator in Embodiment 1 of this invention.

Explanation of symbols

３０ セルフテスト回路
３１ セルフテストスイッチ
３２ 自己診断装置
４１ ロープ横揺れ検出装置
４２ 加速度計
４３ セルフテスト回路
４４ セルフテスト実行スイッチ
４５ セルフテスト選択スイッチ
４６ 自己診断装置
４７ 指令部
４８ 判定部
４９ 比較部
５０ 故障診断部
５１ セルフテスト指令
５２ 電源起動指令
５３ ＯＲ条件
５４ 建物横揺れ検出時の判定条件（Ｌｖ＞ＬＯ）
５５ セルフテスト実行不可処理
５６ 建物横揺れ未検出時の判定条件（Ｌｖ≦ＬＯ）
５７ セルフテスト実行処理
５８ セルフテストスキップ処理 1 Elevator control device 2 CPU
DESCRIPTION OF SYMBOLS 3 Memory | storage device 4 Acceleration level calculating part 5 Comparator 6 Timer 7 Building average amplitude calculating part 8 Rope lateral amplitude calculating part 9 Control operation pattern selection part 10 Minimum permissible swing 11 Building natural period 12 Maximum stop time 13 Car position 14 Building Natural frequency 15 Rope information 16 Operation mode selection switch 17 Accelerometer 18 Hoistway 19 Elevator car 20 Hoisting machine 21 Main rope 22 Balance rope 23 Governor rope 24 Control cable

DESCRIPTION OF SYMBOLS 30 Self-test circuit 31 Self-test switch 32 Self-diagnosis device 41 Rope roll detection device 42 Accelerometer 43 Self-test circuit 44 Self-test execution switch 45 Self-test selection switch 46 Self-diagnosis device 47 Command part 48 Judgment part 48 Comparison part 50 Failure Diagnosis unit 51 Self-test command 52 Power supply start command 53 OR condition 54 Judgment condition when building roll is detected (Lv> LO)
55 Self-test execution impossibility processing 56 Judgment condition when building roll is not detected (Lv ≦ LO)
57 Self-test execution process
58 Self-test skip processing

Claims (4)

An elevator rope roll detection device that detects the amount of rope roll caused by slow shaking of buildings due to long-period earthquakes or strong winds,
The rope roll detection device is
Seismic acceleration using the maximum stop time required for the elevator to stop at the nearest floor, the minimum allowable runout that is the minimum distance until the rope in the hoistway contacts the equipment in the hoistway, and the primary natural period of the building First rope roll detecting means having an acceleration level calculation unit for calculating the first acceleration level of
A second rope roll detecting means having a rope lateral amplitude calculating section that estimates and calculates the amount of rope roll using the amount of forced displacement from the building applied to the rope, the duration of the shake, and the natural frequency of the building. When,
An operation mode selection means capable of selecting the first rope roll detection means and the second rope roll detection means;
A self-test circuit with a self-test selection switch is used to determine whether or not the self-test can be executed according to the building shake detection level, and to generate an earthquake acceleration detection signal to check the operation of the rope shake detection device . Self-diagnosis means ,
An elevator rope roll detection device characterized by comprising: An elevator rope roll detection device that detects the amount of rope roll caused by slow shaking of buildings due to long-period earthquakes or strong winds,
The rope roll detection device has a maximum stop time required for the elevator to stop at the nearest floor, a minimum allowable swing amount that is a minimum distance until the rope in the hoistway contacts the equipment in the hoistway, and 1 of the building. A first rope roll detecting means having an acceleration level calculation unit for calculating a first acceleration level of seismic acceleration using the next natural period, a forced displacement amount from the building applied to the rope, a duration of the shaking, and a building specific Acceleration as a result of the first rope roll detecting means, comprising second rope roll detecting means having a rope lateral amplitude calculating section for estimating and calculating the amount of rope roll using the frequency. in rope roll detection device for an elevator rather guiding the second rope roll detecting means with a level,
A self-test circuit with a self-test selection switch is used to determine whether or not the self-test can be executed according to the building shake detection level, and to generate an earthquake acceleration detection signal to check the operation of the rope shake detection device. rope roll detection device characteristics and to Rue elevators in that it comprises a self-diagnosis means. An elevator rope roll detection device that detects the amount of rope roll caused by slow shaking of buildings due to long-period earthquakes or strong winds,
The rope roll detection device has a maximum stop time required for the elevator to stop at the nearest floor, a minimum allowable swing amount that is a minimum distance until the rope in the hoistway contacts the equipment in the hoistway, and 1 of the building. A first rope roll detecting means having an acceleration level calculation unit for calculating a first acceleration level of seismic acceleration using the next natural period, a forced displacement amount from the building applied to the rope, a duration of the shaking, and a building specific A second rope roll detecting means having a rope lateral amplitude calculating section for estimating and calculating a rope roll amount using the frequency, wherein the first rope roll detecting means and the second rope are provided. in rope roll detection device for an elevator that preparative aND condition for results of roll detecting means,
A self-test circuit with a self-test selection switch is used to determine whether or not the self-test can be executed according to the building shake detection level, and to generate an earthquake acceleration detection signal to check the operation of the rope shake detection device. rope roll detection device characteristics and to Rue elevators in that it comprises a self-diagnosis means. When the self-test selection switch is in the ON state, determines the self-test execution possibility at power-up, when the self-test selection switch is in the OFF state, we claim 1, characterized in that skips execution of the self test The elevator rope roll detection device according to any one of claims 3 to 4.

Images