JP4773704B2 - Elevator control device - Google Patents

Description

  The present invention relates to an elevator control device that controls the movement of a car in accordance with the amount of swaying of a car drive rope or governor rope of a governor.

  For example, in a skyscraper, when a building shakes greatly due to an earthquake or the like, the drive rope between the drive mechanism suspended in the elevator hoistway and the car and the endless governor rope of the governor May sway and interfere with nearby equipment, and the interference of the rope with the equipment may interfere with the operation of the car.

  Therefore, for example, as in the technique described in Patent Document 1 below, an elevator that controls an elevator by detecting a swing of a governor rope arranged in a hoistway has been proposed.

  In this elevator control device, an operating piece is attached to a rod of a vibration suppression device for a governor rope, and an automatic return type detection switch operated by the operating piece is attached to a car.

When the governor rope is displaced beyond a set value due to the swing of the car, the rod vibrates up and down with respect to the mounting arm provided in the vibration suppressing device, and is disposed above and below the mounting arm. A pair of damping springs alternately expands and contracts, but when the rod moves up more than a set amount, the operating piece comes into contact with the operating lever, that is, the detection switch is activated and the detection relay generates a signal. The alarm buzzer sounds and the control circuit temporarily stops the car.
JP-A-7-53155

  However, in the conventional elevator control device, as described above, a mechanical detection switch is used, and the operation piece is turned on and off from the operation lever according to the amount of movement of the rod, and indirectly. In addition, since the governor rope swing is detected, high detection accuracy cannot be obtained.

  That is, the operating piece is attached to the governor rope, and the operating piece moves in the proximity direction or the direction away from the operation lever, and moves in the proximity direction so that the operation piece comes into contact with the operation lever. While the switch is turned on, the movement of the governor rope is indirectly detected by moving in the separation direction to release the contact and turning off the switch.

  For this reason, for example, when the length of the governor rope is extended and deformed with time, the distance between the operating piece and the operation lever becomes large, and the set amount changes. Further, when the operating piece comes into strong contact with the operation lever, the operation lever may be deformed or misaligned.

  As a result, there is a possibility that the accuracy of the governor rope swing detection by the detection switch is lowered.

The present invention has been devised in view of the actual situation of the conventional elevator control device, and the invention according to claim 1 is not limited to the drive rope and the governor rope, particularly when the car is raised or lowered or stopped. A rope sway detecting mechanism that directly detects one of the swaying displacements in a non-contact state, and the rope sway detecting mechanism sends a flat fan-like or belt-like light beam from a direction perpendicular to the longitudinal direction of the rope. The optical sensor is configured to directly irradiate the rope, and is set so that the rope penetrates the detection range with a predetermined range in the longitudinal direction of the light beam as a detection range, and the rope is out of the detection range. This is characterized in that it is detected .

In the invention according to claim 2, two photosensors are provided for one rope, and the two photosensors are arranged so that light beams emitted from the two photosensors intersect when viewed from the plane. In addition, the range in which the light beams emitted from the two optical sensors overlap each other when viewed from the plane is defined as the detection range of the rope swing detection mechanism .

The invention described in claim 3 is provided with a rope sway detection mechanism that directly detects, in a non-contact state, a swaying displacement of at least one of the drive rope and the governor rope , particularly when the car is raised or lowered or stopped. The rope swing detection mechanism is configured by providing two optical sensors for irradiating light from a direction perpendicular to the longitudinal direction of the rope with respect to one rope, and the two optical sensors are , The light beams emitted from the two photosensors are arranged so as to intersect each other when viewed from the plane, and the rope shake detection mechanism is located before the position where the light beams emitted from the two photosensors intersect each other, A substantially triangular shape range when viewed from the plane is set as a detection range so that the rope penetrates the detection range, and the rope is extended from the detection range. It is characterized in that is adapted to detect that out.

According to a fourth aspect of the present invention, there is provided a control circuit for continuing or stopping the up-and-down movement of the car based on an information signal detected from the rope sway detection mechanism .

The invention according to claim 5 is characterized in that the object to be detected by the rope swing detection mechanism is set to the governor rope .

According to the first and third aspects of the present invention, for example, when the governor rope swings while the car is moving up and down, the rope swing detection mechanism detects the swing displacement of the governor rope in a non-contact state and directly. In other words, because the detection is optically and electrically rather than mechanically, even if the length of the governor rope stretches and deforms over time, even if the object to be detected physically changes, the rope swings. Can be detected accurately, and high detection accuracy can be obtained.

  As a result, in the event of an unforeseen event such as an earthquake, the operation of the car can be stopped quickly, ensuring high safety, and secondary damage to the elevator due to rope swings. Can be prevented.

In addition, since the rope swing detection mechanism is configured by an optical sensor, it is possible to always detect the swing of the rope accurately and reliably.

In addition, since the optimum shape of the irradiation light beam of the optical sensor can be arbitrarily selected according to the specification or structure of the elevator, it becomes possible to detect the swing displacement of the rope more accurately.

Furthermore, according to the second and third aspects of the invention, since the shake of the rope can be detected by combining the light beams emitted from the two optical sensors, the degree of freedom of the detection range of the shake displacement is improved and the detection is performed. The accuracy can be further increased.

According to the fourth aspect of the present invention, since the control circuit accurately monitors the operation of the elevator by the information signal from the rope sway detection mechanism, the safety can be improved.

According to the third aspect of the present invention, since the object to be detected is set to the governor rope, it is possible to prevent the car from shaking greatly. In other words, the driving rope linked to the car is always in tension due to the weight of the car and the weight of the passenger, so even if an earthquake occurs, the driving rope itself will not shake. It will be smaller than the amount of shaking of the basket. Therefore, information corresponding to the sway of the car can be accurately detected by detecting the sway of the governor rope that is not applied with a large tension, instead of the sway amount of the drive rope.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an elevator control device according to the present invention will be described in detail with reference to the drawings.

  In this embodiment, the present invention is applied to a so-called traction type elevator, and as shown in FIG. 7, the elevator includes a pair of guide rails 2 attached to the inner wall surface of the hoistway 1 along the vertical direction, A car 3 provided in the hoistway 1 through the guide rail 2 so as to be movable up and down, and the elevator 3 is moved up and down relative to the car 3 through another guide rail (not shown). The counterweight 4, the parallel three round steel drive ropes 5 linking the car 3 and the counterweight 4, and the support 6 in the machine room above the hoistway 1. A drive sheave 7 that is mounted on and fixed to one side of the upper surface and drives the drive rope 4 and a governor rope 9 that is arranged vertically on the side of the car 3 in the hoistway 1. For example, a disk-type governor 8 having An optical sensor 10 that is a rope swing detection mechanism that detects the swing displacement of the governor rope 9 and a control circuit 11 that controls the driving of the car 3 based on a detection signal output from the optical sensor 10 are provided. .

  The speed governor 8 has a function of detecting when the raising / lowering speed of the car 3 is abnormally increased and stopping the car 3, and is mounted on the upper surface of the support base 6. Winding between the stationary sheave 12 fixed, the governor rope tensioning wheel 13 provided in the pit below the hoistway 1, and between the speed controlling sheave 12 and the governor rope tensioning wheel 13, The car 3 and the endless governor rope 9 that rotates synchronously are provided.

  The governor rope 9 is rocked by a plurality of U bolts 15 which are attached to a governor rope rocking bracket 14 whose one side wire 9a side is fixed to the inner wall surface of the hoistway 1 at predetermined intervals in the vertical direction. Has been.

  The optical sensor 10 includes a light emitter 16 that is fixed to the bracket 14 and irradiates a laser beam, which is a light beam, on the other side strip 9b of the governor rope 9, and most of the other side strip 9b of the governor rope 9 It is designed to detect shaking at locations with large shaking displacement.

  If it demonstrates concretely, the said light emitter 16 is a strip | belt-shaped thing of substantially uniform width toward the front from the sensor head of the light emitter 16 shown to FIG. 1A as a shape aspect of the laser beam 17 irradiated from a sensor head, There are a flat fan-like shape that spreads forward from the sensor head shown in FIG. 1B and a straight fan-shaped one that bundles a plurality of sensor heads shown in FIG. 1C. It is designed to use a combination of different things.

  The control circuit 11 has various control modes. As one of them, if the swing signal (on / off signal) of the governor rope 9 detected by the optical sensor 10 is input and the swing width is within a set range, The car 3 is continuously driven, and when the car 3 is out of the set range, the car 3 is controlled to a dedicated operation. This exclusive operation means that the car 3 is stopped on the spot, or the vehicle is decelerated or decelerated and stopped at the nearest floor, or it cannot be stopped at the nearest floor within a predetermined time. An emergency stop.

  Hereinafter, an embodiment using each of the various optical sensors 10 having the laser beam 17 shape will be described with reference to FIGS.

  First, what is shown in FIG. 2 is the one in which the shape of the laser beam 17 of the light emitter 16 is the one shown in FIG. 1A alone, and the normal detection range of the laser beam 17 is set to a predetermined length range T in the longitudinal direction. (The portion surrounded by a broken line), and the other side strand 9b of the governor rope 9 is set so as to pass through substantially at the center position in the width direction and the longitudinal direction of the range T. That is, the laser beam 17 is irradiated from the direction perpendicular to the longitudinal direction of the governor rope 9 (right angle direction).

  For example, when the governor rope 9 is shaken by an earthquake or the like while the car 3 is moving up and down, this is detected when the other end side rope 9b is shaken and displaced within the detection range T. An ON signal is output from the optical sensor 10 to the control circuit 11, and the control circuit 11 determines that this is normal and performs control to continue driving the car 3 as it is.

  On the other hand, when the swing of the other end side ridge 9b is out of the detection range T, an off signal is output from the optical sensor 10, whereby the control circuit 11 determines that it is abnormal, and this abnormal state Is determined to be continued for a predetermined time by the timer, the control is performed to stop the car 3 at the nearest floor, for example, the dedicated operation.

  Thus, in the present embodiment, the optical sensor 10 detects the displacement of the other end side cable-like shape 9b of the governor rope 9 in a non-contact state and directly with respect to the other end side cable-like shape 9b. Because it is detected optically rather than mechanically, the governor rope 9 can be accurately swayed even if the object to be detected physically changes, such as when the length of the governor rope 9 expands and deforms over time. Therefore, it is possible to obtain a high detection accuracy.

  As a result, when an unexpected situation such as an earthquake occurs, the operation of the car 3 can be promptly stopped to the nearest floor by the control circuit 11, and high safety can be ensured and the car 3 can be shaken. It is possible to prevent secondary damage of the elevator due to the above.

  Since the control circuit 11 accurately monitors the operation of the elevator by the information signal from the optical sensor 10, the safety can be improved.

  Moreover, since the object to be detected is set to the other end side ridge 9b without shaking of the governor rope 9, the governor rope 9 can be prevented from greatly shaking. That is, not the amount of swinging of the drive rope 4 that is less swayed by a large tension, but the detection of the sway of the governor rope 9 with less tension, and in particular, the other end side ridge 9b without swaying is detected. Information corresponding to the shaking of the car 3 can be accurately detected.

  In addition, since the rope swing detection mechanism is configured by the optical sensor 10, the swing of the governor rope 9 can always be detected accurately and reliably.

  Next, in the embodiment shown in FIG. 3, the shape of the laser beam 17 of the optical sensor 10 is a combination of two fan-shaped ones shown in FIG. 1B, and the laser beam emitted from both light emitters 16 and 16 is used. 17 and 17 were set so as to intersect with each other from a substantially right angle as seen from the plane.

  The normal detection range T is set to an irregular shape range (a portion surrounded by a broken line) where the two laser beams 17 and 17 overlap each other, and the other side of the governor rope 9 is located at a substantially central position of the detection range T. The rope 9b is set so as to penetrate therethrough.

  Therefore, when it is detected that the wobbling of the other end side rope 9b is within the detection range T, the control circuit 11 continues to drive the car 3 as it is based on the ON signal from the optical sensor 10. When the control is performed, but it is detected that the sensor is out of the detection range T, that is, when an OFF signal is output, the control circuit 11 detects that it is abnormal as described above, and this abnormal state is detected for a predetermined time. When it continues, control which stops the car 3 to the nearest floor, for example is performed.

  As described above, in this embodiment, the same effect as that of the previous embodiment can be obtained, and various laser beams irradiated using the two optical sensors 10 and 10 can be combined to form the governor rope 9. Since the vibration can be detected, the degree of freedom of the detection range of the vibration displacement is improved and the detection accuracy can be further increased.

  In the embodiment shown in FIG. 4, the shape of the laser beam 17 is the same as the above-mentioned one, and two fan-shaped ones shown in FIG. 1B are used in combination. 17 and 17 were set to intersect at an angle slightly smaller than 90 ° when viewed from the plane.

  The normal detection range T is set to a substantially triangular shape range (inside portion surrounded by a broken line) where the laser beams 17 and 17 are not overlapped before the position where the laser beams 17 and 17 overlap each other. The other side strand 9b of the governor rope 9 is set so as to pass through at a substantially central position.

  Therefore, when the optical sensor 10 detects that the other end side strand 9b swings within the detection range T, based on the ON signal from the optical sensor 10, the control circuit 11 is normal. When the control is performed to continue the driving of the car 3 as it is, but it is detected that it is out of the detection range T, that is, the other end side ridge 9b hits the laser beams 17 and 17 As described above, when the control circuit 11 determines that an abnormality has occurred and this abnormal state continues for a predetermined time, control is performed to stop the car 3 at the nearest floor, for example. Therefore, this embodiment can obtain the same effects as those of the above embodiments.

  In the embodiment shown in FIG. 5, the shape of the laser beam 17 is a combination of two linear shapes shown in FIG. 1C, and the laser beams 17 and 17 irradiated from both light emitters 16 and 16 are planar. In view of the above, the crossing angles are set so that they cross each other at an angle slightly smaller than 90 °.

  The normal detection range T is set to a substantially triangular shape range (inner portion surrounded by a broken line) where the laser beams 17 and 17 do not overlap each other before the position where the laser beams 17 and 17 overlap each other. It set so that the other side strand 9b of the governor rope 9 might penetrate and be located in the center position.

  Therefore, when the optical sensor 10 detects that the other end side ridge 9b swings within the detection range T, the control circuit 11 determines that it is normal and continues to drive the car 3 as it is. However, if it is detected that the outside of the detection range T, that is, that the other end side filament 9b has hit the laser beam 17 or 17, the control circuit 11 is abnormal as described above. If the abnormal state continues for a predetermined time, control is performed to stop the car 3 at, for example, the nearest floor. Therefore, this embodiment can obtain the same effects as those of the above embodiments.

  FIG. 6 shows a further different embodiment in which the laser beams 17a and 17b are shaped like the fan-shaped one shown in FIG. 1B and the first and second photosensors 10a, 10b shown in FIG. 1C. A combination of the two is used. The laser beams 17a and 17b irradiated from the respective light emitters 16a and 16b are irradiated in parallel with each other, and the fan-shaped laser beams 17a irradiated from the first light emitter 16a are compared. A large opening angle α was set, and the other end side filament 9b was set in a penetrating state at a substantially central position in the range of the angle α.

  On the other hand, the second light emitter 16b is spaced apart from the one light emitter 16a in the width direction, and is one of the two floor level adjusting vanes 18 and 19 provided in the hoistway 1. The laser beam 17 b is radiated in a straight line along the vane 18. The floor level adjusting vanes 18 and 19 detect the current door opening position of the car 3 via a position detector provided in the car 3, and the detection result is obtained by the detection result. It is displayed on an indicator provided in the car 3.

  The normal detection range T by the first optical sensor 10a is within the range of the angle α of the laser beam 17a (the range T surrounded by a circle), while the second optical sensor 10b has the other end side strand 9a. Touches the laser beam 17b, that is, the laser beam 17b is defined as an abnormal boundary line L, which is detected.

  Therefore, the control circuit 11 determines that the other end side strip 9b of the governor rope 9 is normal when it is within the irradiation angle range T of the first optical sensor 10a, and is out of the detection range T. Is temporarily determined to be abnormal, but this abnormal range is an allowable range, and control is performed to continue driving the car 3.

  When the second optical sensor 10b detects the other end-side cable 9b, that is, when the second optical sensor 10b shakes more than the abnormality detection boundary line L, for example, the car 3 is stopped at the nearest floor as a dedicated operation. So that it is controlled.

  More specifically, the first photosensor 10a outputs a detection on signal on the assumption that the other end-side cable 9b is within the detection range T, and the second photosensor 10b outputs an off signal. When the control circuit 11 determines that the other end side cable-like shape 9b is inside the abnormality detection boundary line L, the control is performed to drive the car 3 as it is because it is normal.

  Next, when the first optical sensor 10a outputs an off signal, that is, it is detected that it is out of the detection range T, and the second optical sensor 10b also outputs the off signal, the car 3 Control to continue driving is performed as it is. That is, in this range, control is performed so that the operation of the car 3 is not hindered and the safety is ensured and the driving is continued.

  In addition, when the first optical sensor 10a outputs an off signal and the second optical sensor 10b outputs an on signal, the other end side ridge 9b is greatly shaken to the abnormality detection boundary line L, so that the control is performed. The circuit 11 performs control to stop the car 3 at the nearest floor. In this state, the governor rope 9 may be greatly shaken to ride on or get entangled with the floor level adjusting vanes 18 and 19, so that the driving of the car 3 is quickly stopped as a dedicated operation, for example. I do.

  After the stop state of the car 3 continues, when the first optical sensor 10a outputs an off signal and the second optical sensor 10b also outputs an off signal, it still returns to the normal detection range T. Therefore, the control circuit 11 maintains the stopped state without restarting the driving of the car 3.

  Thereafter, when the first optical sensor 10a detects the detection range T and outputs an ON signal, and the second optical sensor 10b outputs an OFF signal, the driving of the car 3 is resumed.

  The control circuit 11 also outputs a signal when the first photosensor 10a outputs an off signal and the second photosensor 10b outputs an off signal, and these respective signals are continuously output for a predetermined time. When either or both of the optical sensors 10a and 10b are out of order, or the governor rope 9 may be tangled with the equipment in the hoistway 1, the driving of the car 3 is stopped immediately. Take control.

  Further, if the first optical sensor 10a continuously outputs the ON signal and the second optical sensor 10b also outputs the ON signal for a predetermined time, it is considered that each of the sensors 10a and 10b has failed. Stop driving.

  As described above, in this embodiment, since the swing of the governor rope 9 is detected using the optical sensors 10a and 10b of the laser beams 17a and 17b having different shapes, high detection accuracy of the governor rope 9 is obtained. Since the interference between the governor rope 9 and other devices can be prevented in advance, the safety is further improved.

  The present invention is not limited to the configuration of the above embodiment, and it is possible to combine the laser beams 17 of the respective optical sensors 10 in accordance with the specifications and structure of the elevator, thereby more governor rope 9. Can be detected with high accuracy.

  In addition, as the rope to be swayed, it is possible to use not only the governor rope 9 but also the drive rope 5.

  Furthermore, the rope swing detection mechanism is not limited to the optical sensor, and other electrical detection mechanisms may be used as long as the swing of the rope can be directly detected in a non-contact state. .

The aspect of the laser beam of the some optical sensor provided to embodiment of the elevator control apparatus which concerns on this invention is shown, A is a strip | belt shape, B is a fan shape, C is a top view which shows a linear laser beam. It is a principal part top view which shows the 1st Embodiment of this invention. It is a principal part top view which shows 2nd Embodiment. It is a principal part top view which shows 3rd Embodiment. It is a principal part top view which shows 4th Embodiment. It is a principal part top view which shows 5th Embodiment. 1 is an overall schematic diagram of an elevator control apparatus according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hoistway 2 ... Guide rail 3 ... Ride car 4 ... Balance weight 5 ... Drive rope 8 ... Speed governor 9 ... Governor rope 9b ... Other end side cord shape 10 ... Optical sensor (rope fluctuation detection mechanism)
11 ... Control circuit 16 ... Light emitter 17 ... Laser beam

Claims (5)

In an elevator that raises and lowers a car in a hoistway via a drive rope linked to a drive mechanism, and arranges an endless governor rope linked to the car vertically in the hoistway,
A rope sway detection mechanism that directly detects a sway displacement of at least one of the drive rope and the governor rope in a non-contact state while the car is being raised or lowered or stopped ,
The rope sway detection mechanism is configured by an optical sensor that directly irradiates the rope with a flat fan-shaped or belt-shaped light beam from a direction perpendicular to the longitudinal direction of the rope. An elevator control apparatus , wherein a range is set as a detection range so that the rope penetrates the detection range, and the rope is detected to be out of the detection range . Two optical sensors are provided for one rope, and the two optical sensors are arranged so that the light beams emitted from the two optical sensors intersect when viewed from the plane,
2. The elevator control device according to claim 1, wherein a range in which light beams emitted from the two optical sensors overlap with each other when viewed from a plane is set as a detection range of the rope swing detection mechanism. In an elevator that raises and lowers a car in a hoistway via a drive rope linked to a drive mechanism, and arranges an endless governor rope linked to the car vertically in the hoistway,
A rope sway detection mechanism that directly detects a sway displacement of at least one of the drive rope and the governor rope in a non-contact state while the car is being raised or lowered or stopped,
The rope swing detection mechanism is configured by providing two optical sensors for irradiating a light beam from a direction perpendicular to the longitudinal direction of the rope with respect to one rope, and the two optical sensors are The light beams emitted from the two photosensors are arranged so as to intersect each other when seen from the plane,
In the rope swing detection mechanism, the rope penetrates the detection range with a substantially triangular shape range as a detection range when viewed from a plane before the position where the light beams emitted from the two optical sensors intersect each other. The elevator control device is configured to detect that the rope is out of the detection range. The elevator control device according to any one of claims 1 to 3 , further comprising a control circuit that continues or stops the up-and-down movement of the car based on an information signal detected from the rope swing detection mechanism. . The elevator control device according to any one of claims 1 to 4 , wherein a detection target by the rope swing detection mechanism is set to the governor rope.

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