JP5074917B2 - Elevator emergency stop inspection device and emergency stop inspection method - Google Patents

Description

  The present invention relates to a traction type elevator using a counterweight, and more particularly, to an emergency stop inspection device and an emergency stop inspection method for an elevator for checking whether or not an emergency stop device operates normally.

  A trunktion type elevator is generally a car that can be moved up and down along a guide rail, a counterweight connected to the car via a rope, and a hoisting machine that winds and lowers the rope. And. Further, in order to ensure the safety of the elevator, there are a speed governor that detects the raising / lowering speed of the car and an emergency stop device that is provided on the car and generates a frictional force on the guide rail to stop the car. Is provided. For example, when the rope breaks and the lowering speed of the car exceeds a predetermined specified value, an overspeed of the car is detected by the governor, and the emergency stop device operates via the link mechanism.

  It is necessary to conduct an operation test of the emergency stop device during elevator installation and periodic maintenance inspection. For example, in the test method described in Patent Document 1, a rope gripping mechanism of a speed governor that is a part of a link mechanism is operated manually or remotely, and then a hoisting machine is driven to lower the car at a low speed. At this time, if the emergency stop device operates normally, the sheave of the hoisting machine idles without moving the car. The control device determines whether the sheave of the hoisting machine is idle due to the signal from the encoder, for example, when it is determined that the sheave of the hoisting machine is idle (in other words, when the emergency stop device operates normally) ), A buzzer provided in the car is blown.

JP 2005-247433 A

However, there are the following problems in the above-described prior art.
That is, in the above-described prior art, whether or not the emergency stop device is activated is confirmed by checking whether or not the sheave of the hoisting machine is idle when the hoisting machine is driven to lower the car. It comes to confirm. For this reason, when a rope having a large friction coefficient is used, such as a rope coated with an outer layer with a resin, the rope may be damaged due to idling of the sheave of the hoisting machine.

  An object of the present invention is to provide an emergency stop inspection device and an emergency stop inspection method for an elevator that can confirm the operation of an emergency stop device while preventing damage to a rope.

In order to achieve the above object, the present invention includes a car provided so as to be movable up and down along a guide rail, a counterweight connected to the car via a rope, and hoisting and lowering the rope. A hoisting machine that performs, a speed governor that detects a lifting speed of the car, an emergency stop device that is provided in the car and generates a frictional force on the guide rail to stop the car, and An emergency stop inspection device for an elevator comprising a link mechanism connected between the speed governor and the emergency stop device, and operating the emergency stop device when the speed governor detects an overspeed of the car. in the lifting hoist to lift the counterweight directly, the detection means for detecting a rotation angle of the hoisting machine, when lifted the balancing weight at the lifting hoist while operating the link mechanism, before And a judging means judges that said the safety gear has been activated when it detects a state in which the hoisting machine is not rotated by the detection means.
In order to achieve the above object, the present invention includes a car provided so as to be movable up and down along a guide rail, a counterweight connected to the car via a rope, and winding and winding of the rope. A hoisting machine for lowering, a speed governor for detecting the raising / lowering speed of the car, and an emergency stop device that is provided in the car and generates a frictional force on the guide rail to stop the car And an emergency stop of an elevator comprising a link mechanism connected between the speed governor and the emergency stop device and operating the emergency stop device when the speed governor detects an overspeed of the car. in checking device, a lifting hoist to lift the counterweight directly, and detecting means for detecting a load of said lifting upper unit, when lifted the counter weight at the lifting hoist while operating the link mechanism And a determining means for determining a safety device is actuated when said detects a state in which the load increases the lifting hoist by the detecting means.

In order to achieve the above object, the present invention includes a car provided so as to be movable up and down along a guide rail, a counterweight connected to the car via a rope, and winding and winding of the rope. A hoisting machine for lowering, a speed governor for detecting the raising / lowering speed of the car, and an emergency stop device that is provided in the car and generates a frictional force on the guide rail to stop the car And an emergency stop of an elevator comprising a link mechanism connected between the speed governor and the emergency stop device and operating the emergency stop device when the speed governor detects an overspeed of the car. in service method, lift the counterweight with Jijo machine while operating the link mechanism directly, and the the emergency stop device actuated when the hoisting machine when its detects a state in which no rotation decision That.
In order to achieve the above object, the present invention includes a car provided so as to be movable up and down along a guide rail, a counterweight connected to the car via a rope, and winding and winding of the rope. A hoisting machine for lowering, a speed governor for detecting the raising / lowering speed of the car, and an emergency stop device that is provided in the car and generates a frictional force on the guide rail to stop the car And an emergency stop of an elevator comprising a link mechanism connected between the speed governor and the emergency stop device and operating the emergency stop device when the speed governor detects an overspeed of the car. In the inspection method, when the link mechanism is operated, the counterweight is directly lifted by the lifting machine, and when the increased load of the lifting machine is detected at that time, the emergency stop device is activated. A constant.

  According to the present invention, it is possible to confirm the operation of the emergency stop device while preventing damage to the rope.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing the overall structure of an elevator to which an embodiment of an emergency stop inspection apparatus for elevators according to the present invention is applied.

  In FIG. 1, an elevator includes a car 1 provided so as to be movable up and down along a guide rail (not shown), a counterweight 3 connected to the car 1 via a main rope 2, and a main rope. The hoisting machine 4 for hoisting and lowering the car 2, the speed governor 5 for detecting the raising / lowering speed of the car 1, and the car 1 are provided with a frictional force against the guide rail to cause the car 1 to move. An emergency stop device 6 for stopping, a shock absorber (not shown) that is provided on the floor (pit) of the hoistway and that reduces the impact force when the car 1 collides, and is provided on the floor of the hoistway. And a shock absorber 7 for reducing the impact force when the counterweight 3 collides.

  The main rope 2 includes a pulley 1a provided at the lower part of the car 1, a turning pulley 8A provided at the upper part of the hoistway, a sheave 4a of the hoisting machine 4, a turning pulley 8B provided at the upper part of the hoistway, The pulley 3a provided on the upper part of the counterweight 3 is wound around in that order, and both ends are fixed to the upper part of the hoistway. In the present embodiment, the main rope 2 is an outer layer coated with a resin.

  The hoisting machine 4 includes the sheave 4a, an electric motor (not shown) that rotationally drives the sheave 4a, and an encoder 9 that detects the rotation angle of the sheave 4a. Then, for example, a control panel (not shown) installed in the lower part of the hoistway inputs a rotation angle signal from the encoder 9 and performs predetermined calculation processing, and the generated control signal is sent to the motor of the hoisting machine 4. Output to. For example, when the hoisting machine 4 winds up the main rope 2 (when the sheave 4a rotates counterclockwise in FIG. 1), the car 1 is raised and the counterweight 3 is lowered. On the other hand, for example, when the hoisting machine 4 lowers the main rope 2 (when the sheave 4a rotates clockwise in FIG. 1), the car 1 descends and the counterweight 3 rises.

  The governor 5 is provided at the upper part of the hoistway, and a tension pulley 10 is provided at the lower part of the hoistway. A governor rope 11 is provided between the pulley 5 a of the governor 5 and the tension pulley 10. It is wound. A connecting member 12 is pivotally supported on the car 1, and this connecting member 12 is connected to the governor rope 11. With such a configuration, the speed governor rope 11 moves as the car 1 moves up and down, and the speed governor 5 detects the lifting speed of the car 1.

  Although not shown in detail, the speed governor 5 opposes the pulley 5a around which the speed governor rope 11 is wound, a pair of pendulums rotated by the centrifugal force of the pulley 5a, and the rotational force of these pendulums. An adjustment spring having an urging force to be applied, and a rope gripping mechanism that operates in accordance with the pivoting position of the pendulum. For example, when the raising / lowering speed of the car 1 exceeds a predetermined specified value, the rotational speed of the pulley 5a is increased, the centrifugal force is increased, and the pendulum is rotated. The rope 11 is fixed. When the car 1 is lowered in this state, the connecting member 12 is pulled up and the emergency stop device 6 is activated.

  Although not shown in detail, the emergency stop device 6 is connected to the connecting member 12 and is provided on the car 1 side with a pair of trapezoidal brakes arranged so as to sandwich the guide rail. And a guide member that slides in the vertical direction. For example, when the connecting member 12 is pulled up, the pair of brakes move upward and move toward each other, and a frictional force is generated between the pair of brakes and the guide rail. Thereby, the car 1 is stopped.

  In the elevator configured as described above, it is necessary to perform an inspection operation (operation test) of the emergency stop device 6 at the time of installation or periodic maintenance inspection, for example. The procedure of the inspection work of the emergency stop device 6 according to the present embodiment is as follows. First, the hoisting machine 4 is driven to move the positions of the car 1 and the counterweight 3, and a sufficient work space is secured below the counterweight 3. To do. Thereafter, a base 13 is attached so as to cover the shock absorber 7, and a jack 14 (lifting machine) is installed on the base 13. The jack 14 is an electric pantograph jack as shown in FIG. 2 and FIG. 1 described above, and includes a fixing base 14a that can be fixed to the pedestal 13 and a pair of pivotally connected to the fixing base 14a. A lower arm 14b, a pair of upper arms 14c rotatably connected to the tips of the pair of lower arms 14b, a cradle 14d provided at the tips of the pair of upper arms 14c, and an upper arm A block (not shown) provided at a connecting portion between 14b and the lower arm 14c, a ball screw 14e supported by one block and screwed to the other block, and the ball screw 14e being rotationally driven. And an electric motor 14f.

  Then, the hoisting machine 4 is driven to move the car 1 and the counterweight 3, and the counterweight 3 is brought into contact with the cradle 14 d of the jack 14. Then, after the rope gripping mechanism of the speed governor 5 is operated by, for example, remote operation to fix the speed governor rope 11, the jack 14 is operated by, for example, remote operation to lift the counterweight 3 (at this time) The sheave 4a of the hoisting machine 4 is allowed to rotate freely). As a result, the car 1 is lowered and the connecting member 12 is pulled up. If it is normal, the emergency stop device 6 operates. The control unit 15 (information processing device) inputs the rotation angle signal of the encoder 9 when the counterweight 3 is lifted, determines whether or not the emergency stop device 6 is operated based on this, and determines the determination result. It is displayed on the display unit 16 (for example, a monitor). The details of the control processing of the control unit 15 will be described with reference to FIG.

  FIG. 3 is a flowchart showing a control procedure of the control unit 15.

  In FIG. 3, first, in step 100, it is determined whether or not the jack 14 has reached the stroke end based on, for example, a stroke signal from the jack 14 or the like. Since the jack 14 does not reach the stroke end at the beginning, the determination in step 100 is not satisfied, and the routine proceeds to step 110. In step 110, the rate of change of the rotation angle of the sheave 4a of the hoisting machine 4 is calculated from the rotation angle signal of the encoder 9. Then, it progresses to step 120 and it is determined whether the rate of change of the rotation angle of the sheave 4a of the hoisting machine 4 is less than a preset threshold value, and thereby the sheave 4a of the hoisting machine 4 is not rotating. It is determined whether or not the emergency stop device 6 has been activated. More specifically, for example, when the emergency stop device 6 is not in operation, tension is applied to the main rope 2, and the sheave 4a of the hoisting machine 4 is rotated by the main rope 2, so that it is indicated by a solid line in FIG. In addition, the rate of change of the rotation angle of the sheave 4a takes a constant value (in other words, the rotation angle of the sheave 4a monotonously increases as the stroke of the jack 14 increases). On the other hand, for example, when the emergency stop device 6 is activated, the distance between the car 1 and the counterweight 3 is shortened and the main rope 2 is loosened, so that the sheave 4a of the hoisting machine 4 does not rotate. As indicated by the broken line, the change rate of the rotation angle of the sheave 4a becomes zero (in other words, the rotation angle of the sheave 4a takes a constant value regardless of the increase in the stroke of the jack 14).

  For example, when the rate of change in the rotation angle of the sheave 4a of the hoist 4 is less than a predetermined threshold, the determination in step 120 is satisfied, and the routine proceeds to step 130. In step 130, for example, a message indicating that the safety device 6 has been operated normally is displayed on the display unit 16.

  On the other hand, for example, when the rate of change of the rotation angle of the sheave 4a of the hoisting machine 4 is equal to or greater than a predetermined threshold, the determination in step 120 is not satisfied, and the process returns to step 100 described above. Until the jack 14 reaches the stroke end, the determination at step 100 is not satisfied, and thus the above-described steps 110 and 120 are repeated. Thereafter, for example, when the jack 14 reaches the stroke end while the rate of change in the rotation angle of the sheave 4a of the hoisting machine 4 is not less than the predetermined threshold value α, the determination in step 100 is satisfied, and the routine proceeds to step 140. In step 140, for example, a message indicating an abnormality of the safety device 6 is displayed on the display unit 16.

  As described above, in the present embodiment, it is possible to confirm whether or not the safety device 6 has been normally operated. At this time, since the hoisting machine 4 is not driven by an electric motor, damage to the main rope 3 due to friction with the sheave 4a of the hoisting machine 4 can be prevented. Assuming that the hoisting machine 4 is driven and inspected, the load applied to the hoisting machine 4 during inspection (the total weight of the counterweight) is equal to the load during normal operation (the weight of the counterweight and the weight of the car). Therefore, it is necessary to increase the capacity of the hoist 4 in anticipation of such a difference. On the other hand, in the present embodiment, since the hoisting machine 4 is driven and no inspection is performed, the capacity of the hoisting machine 4 can be suppressed.

  In the above-described embodiment, the case where the electric jack 14 is used has been described as an example. However, the present invention is not limited thereto, and for example, a hydraulic jack or the like may be used. In this case, the same effect as described above can be obtained.

  Another embodiment of the present invention will be described with reference to FIGS. The present embodiment is an embodiment in which it is determined whether or not the emergency stop device 6 has been operated by detecting a change in the load of the jack 14. In the present embodiment, the same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  FIG. 5 is a diagram illustrating the entire structure of an elevator to which the elevator emergency stop inspection apparatus according to the present embodiment is applied.

  In the inspection work of the safety device 6 according to the present embodiment, the pedestal 13 is attached so as to cover the shock absorber 7 and the jack 14 is installed on the pedestal 13 as in the above-described one embodiment. Then, after the rope gripping mechanism of the governor 5 is operated by, for example, remote operation to fix the governor rope 11, the jack 14 is operated by, for example, remote operation to lift the counterweight 3. As a result, the car 1 is lowered and the connecting member 12 is pulled up. If it is normal, the emergency stop device 6 operates.

  In the present embodiment, an ammeter 17 (detection means) for detecting the drive current of the electric motor 14f of the jack 14 is provided, and the control unit 18 (information processing device) is configured to supply current when the counterweight 3 is lifted. A total of 17 current signals are input, and based on this, it is determined whether or not the safety device 6 has been activated, and the determination result is displayed on the display unit 16. The details of the control processing of the control unit 18 will be described with reference to FIG.

  FIG. 6 is a flowchart showing a control procedure of the control device 18.

  In FIG. 6, first, in step 200, it is determined whether or not the jack 14 has reached the stroke end based on, for example, a stroke signal from the jack 14 or the like. Since the jack 14 does not reach the stroke end at the beginning, the determination at Step 200 is not satisfied, and the routine goes to Step 210. In step 210, the load of the jack 14 is calculated from the current signal of the ammeter 17. Thereafter, the routine proceeds to step 220, where it is determined whether or not the load on the jack 14 is greater than the initial load (load at the start of lifting), thereby determining whether or not the emergency stop device 6 has been activated. More specifically, for example, tension is applied to the main rope 2 when the emergency stop device 6 is not operating, and the jack 14 has a weight of the counterweight 3 (usually the car weight of the car 1 and the maximum load capacity). Half) and the weight of the car 1 side is applied, and the load on the jack 14 becomes a constant value L1 as shown by the solid line in FIG. On the other hand, for example, when the emergency stop device 6 is activated, the distance between the car 1 and the counterweight 3 is shortened and the main rope 2 is loosened. Therefore, as shown by the broken line in FIG. When the tension of the main rope 2 is lost, the total weight L2 of the counterweight 3 must be borne.

  For example, when the load of the jack 14 is larger than the initial load, the determination at step 220 is satisfied, and the routine proceeds to step 230. In step 230, for example, a message indicating that the safety device 6 has been normally operated is displayed on the display unit 16.

  On the other hand, for example, when the load on the jack 14 is the same as the initial load, the determination in step 220 is not satisfied, and the process returns to step 200 described above. Until the jack 14 reaches the stroke end, the determination in step 200 is not satisfied, and thus the procedures in steps 210 and 220 described above are repeated. Thereafter, for example, when the jack 14 reaches the stroke end while the load of the jack 14 is the same as the initial load, the determination in step 200 is satisfied, and the routine proceeds to step 240. In step 240, for example, a message indicating an abnormality of the safety device 6 is displayed on the display unit 16.

  Also in the present embodiment configured as described above, the hoisting machine 4 is not driven as in the above-described one embodiment, so that the operation of the emergency stop device 6 can be confirmed while preventing the main rope 3 from being damaged. Further, the capacity of the hoisting machine 4 can be suppressed.

  In the above embodiment, the case where the display unit 16 that displays the result of determining whether or not the safety device 6 has been normally operated has been described as an example, but the present invention is not limited thereto. That is, for example, a voice generation device that notifies the determination result by voice may be provided. In such a case, the same effect as described above can be obtained.

It is the schematic showing the whole structure of the elevator with which one Embodiment of the emergency stop inspection apparatus of the elevator of this invention was applied. It is a figure showing the structure of the jack which constitutes one embodiment of the emergency stop inspection device of the elevator of the present invention. It is a flowchart showing the control procedure of the control part which comprises one Embodiment of the emergency stop inspection apparatus of the elevator of this invention. It is a figure showing the fluctuation | variation of the rotation angle of the winding machine in one Embodiment of the emergency stop inspection apparatus of the elevator of this invention. It is the schematic showing the whole structure of the elevator with which other embodiment of the emergency stop inspection apparatus of the elevator of this invention was applied. It is a flowchart showing the control procedure of the control part which comprises other embodiment of the emergency stop inspection apparatus of the elevator of this invention. It is a figure showing the fluctuation | variation of the load of the jack in other embodiment of the emergency stop inspection apparatus of the elevator of this invention.

Explanation of symbols

1 Car 2 Main rope 3 Balance weight 4 Hoisting machine 5 Speed governor 6 Emergency stop device 9 Encoder (detection means)
14 Jack (lifting machine)
15 Control unit (determination means)
16 Display section (display means)
17 Ammeter (detection means)
18 Control unit (determination means)

Claims (6)

A car provided so as to be able to move up and down along the guide rail, a counterweight connected to the car via a rope, a hoisting machine for hoisting and lowering the rope, and an ascending / descending speed of the car Between the speed governor and the emergency stop device, and a safety device that is provided on the car and generates a frictional force on the guide rail to stop the car. In an emergency stop inspection apparatus for an elevator comprising a link mechanism that is connected and that operates the emergency stop device when the governor detects an overspeed of the car,
A lifting machine that directly lifts the counterweight;
Detecting means for detecting a rotation angle of the hoisting machine ;
Determining means for determining that the emergency stop device is activated when the detecting means detects that the hoisting machine does not rotate when the counterweight is lifted by the lifting machine while operating the link mechanism. When emergency stop inspection device for an elevator, characterized in that it comprises a. A car provided so as to be able to move up and down along the guide rail, a counterweight connected to the car via a rope, a hoisting machine for hoisting and lowering the rope, and an ascending / descending speed of the car Between the speed governor and the emergency stop device, and a safety device that is provided on the car and generates a frictional force on the guide rail to stop the car. In an emergency stop inspection apparatus for an elevator comprising a link mechanism that is connected and that operates the emergency stop device when the governor detects an overspeed of the car,
A lifting machine that directly lifts the counterweight;
Detecting means for detecting the load of the lifting device;
When the counterweight is lifted by the lifting machine while operating the link mechanism, it is determined that the emergency stop device has been activated when the detection means detects an increased load on the lifting machine. emergency stop inspection device for an elevator, characterized in that it comprises a determining means. The elevator emergency stop inspection apparatus according to claim 1 or 2 , further comprising a display means for displaying a determination result of the determination means. The emergency stop inspection apparatus for elevators according to any one of claims 1 to 3 , wherein the lifting machine is operated by an electric motor. A car provided so as to be able to move up and down along the guide rail, a counterweight connected to the car via a rope, a hoisting machine for hoisting and lowering the rope, and an ascending / descending speed of the car Between the speed governor and the emergency stop device, and a safety device that is provided on the car and generates a frictional force on the guide rail to stop the car. In an emergency stop inspection method for an elevator comprising a link mechanism that is connected and operates the emergency stop device when the governor detects an overspeed of the car,
An elevator characterized in that when the link mechanism is operated, the counterweight is directly lifted by a lifting machine, and when it is detected that the hoisting machine does not rotate, it is determined that the emergency stop device is activated. Emergency stop inspection method. A car provided so as to be able to move up and down along the guide rail, a counterweight connected to the car via a rope, a hoisting machine for hoisting and lowering the rope, and an ascending / descending speed of the car Between the speed governor and the emergency stop device, and a safety device that is provided on the car and generates a frictional force on the guide rail to stop the car. In an emergency stop inspection method for an elevator comprising a link mechanism that is connected and operates the emergency stop device when the governor detects an overspeed of the car,
The counterweight is directly lifted by a lifting machine while operating the link mechanism, and when it is detected that the load of the lifting machine has increased at that time, it is determined that the emergency stop device has been activated. How to check the emergency stop of the elevator.

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