JP2006327708A - Governor for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a governor for an elevator capable of easily performing operation speed test. <P>SOLUTION: In the governor for the elevator provided with a pendulum 8d displacing to an outer diameter side of a governor pulley 8a against restoring force of a spring 8b by centrifugal force, a contact 8e abutting on the pendulum 8d to shut off motor current and brake a car when displacement of the pendulum 8d reaches a first predetermined position, a retention body 8g installed at a position where the same can abut on the pendulum 8d when displacement of the pendulum 8d reaches a second predetermined position, and a weight 8f retained by the retention body 8g and gripping a governor rope in corresponding to corrosion of the pendulum 8d and the retention body 8g to operate an emergency stop device, the pendulum 8d is provided with a spindle 8h movable in a rotation outer circumference direction, and the pendulum 8d can be displaced to the first predetermined position and the second predetermined position at a predetermined car speed or less by positioning the spindle 8h in the rotation outer circumference side at a time of operation speed test. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator governor, and more particularly to an elevator governor in which a safety device is operated by a pendulum displaced by a centrifugal force caused by rotation.

  In an elevator, it is obliged to install a governor for urgently stopping the car when the elevator moving speed exceeds a predetermined speed.

  In general, the governor is a shaft-supported governor pulley around which a governor rope that moves in conjunction with the riding car is wound, and rotates with the governor pulley to become a restoring force of the return urging body by centrifugal force when the rotational speed reaches a predetermined speed or more. The pendulum displaced against the outer diameter side of the governor pulley, and the pendulum of the pendulum when the displacement of the pendulum reaches the first predetermined position, that is, when the car reaches 1.3 times the rated speed. At a position where the pendulum collides with the pendulum to stop the motor current and brake the car, and when the pendulum displacement reaches the second predetermined position, that is, the car is 1.4 times the rated speed. A holding body installed at a position where the pendulum can collide with the pendulum at the position of the pendulum when reaching the position, and the governor is held by the holding body and is released by the collision between the pendulum and the holding body. Together and a wait for operating the gripping and safety device for-loop, it is required operating speed tests periodically.

  Conventionally, as a general operation speed test, first, an operator measures an operation speed using a tachometer. In the measurement, the governor is driven independently of the car and the same condition as that when the car exceeds the rated speed is given, and as a method, the governor rope is removed from the governor pulley, The governor pulley is electrically rotated, the operating speed is measured by the tachometer, the governor rope is disconnected from the cage, and the governor rope is dropped with a weight, and the tachometer is used for the operating speed. There is something to measure.

Further, conventionally, a governor operation in which the governor rope wound around the governor pulley is loosened, the weight is dropped, the governor pulley is rotated by the rotational force of the driving roller due to the fall, and the operation speed is measured by a tachometer. An elevator provided with a speed measuring device has also been proposed (see, for example, Patent Document 1).
JP-A-8-188354

  However, when the above-mentioned worker measures the operating speed using a tachometer, it is necessary to remove the governor rope from the governor pulley, which is subject to the governor rope's own weight and the weight of the governor tension pulley that applies tension to the governor rope. In addition, it requires labor, and at least two workers, a worker who drives the governor and a worker who measures the operation speed with a tachometer, are required, which causes an increase in labor costs.

  In addition, when the governor operating speed measuring device having a relatively complicated structure is provided in the elevator, there is a problem that the installation cost increases.

  The present invention has been made from the above-described prior art, and an object thereof is to provide an elevator governor that can easily perform an operation speed test.

  In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is characterized in that a governor pulley on which a governor rope that moves in conjunction with a car ride is wound, and a governor pulley that rotates together with the governor pulley and rotates at a predetermined rotational speed or more. Then, a pendulum that is displaced toward the outer diameter side of the governor pulley against the restoring force of the restoring biasing body by centrifugal force, and when the displacement of the pendulum reaches the first predetermined position, the pendulum collides with the pendulum and the motor current. A contact for braking the car by interrupting, a holding body installed at a position where the pendulum can collide with the pendulum when the displacement of the pendulum reaches a second predetermined position, and held by the holding body An elevator governor comprising a weight for gripping the governor rope and operating an emergency stop device in response to release by collision between the pendulum and the holding body; The movable pendulum is provided with a movable weight, and the position of the weight is positioned on the outer periphery of the rotation at the time of the operation speed test, so that the pendulum is moved to the first predetermined position and the second predetermined speed at a predetermined car speed or less. It is characterized in that it can be displaced to a predetermined position.

  In the invention according to claim 1 of the present invention configured as described above, when the governor operating speed test, the weight provided in the pendulum is located on the rotating outer peripheral side, and the car is run in this state. The centrifugal force acting on the pendulum is increased, and the pendulum is displaced to the first predetermined position and the second predetermined position at a predetermined car speed or less. The operator determines pass / fail by confirming the operation speed at this time by a generally provided speed display function. Thus, the operation speed test of the governor can be performed by one person by running the car at a steady speed without requiring a complicated operation such as removing the governor rope from the governor pulley as in the prior art.

  Further, the invention according to claim 2 of the present invention is a shaft-supported governor pulley around which a governor rope that moves in conjunction with a car ride is wound, and when it rotates together with the governor pulley and reaches a rotational speed higher than a predetermined value, it is restored by centrifugal force. A pendulum that is displaced toward the outer diameter side of the governor pulley against the restoring force of the urging body, and when the displacement of the pendulum reaches the first predetermined position, the pendulum collides with the pendulum to interrupt the motor current and A contact for braking the car, a holding body installed at a position where the pendulum can collide with the pendulum when the displacement of the pendulum reaches a second predetermined position, and the pendulum and the holding In an elevator governor comprising a weight for gripping the governor rope and operating the emergency stop device in response to release by collision with the body, the pendulum is provided with a removable weight, and the weight is mounted. By, is characterized in that the pendulum below the predetermined passenger cage speed is predetermined and can be displaced in the first predetermined position and the second position.

  In the invention according to claim 2 of the present invention configured as described above, a centrifugal force acting on the pendulum can be obtained by attaching a weight to the pendulum and running the cage in this state during a governor operating speed test. The pendulum is displaced to the first predetermined position and the second predetermined position at a predetermined or lower predetermined car speed. The operator determines pass / fail by confirming the operation speed at this time by a generally provided speed display function. Thus, the operation speed test of the governor can be performed by one person by running the car at a steady speed without requiring a complicated operation such as removing the governor rope from the governor pulley as in the prior art.

  Furthermore, the invention according to claim 3 of the present invention is provided at the time of an operation speed test, and is provided with a locking body that prevents the weight from falling due to the opening of the holding body, thereby preventing the operation of the emergency stop device. It is said.

  In the invention according to claim 3 of the present invention configured as described above, the pendulum is moved to the second predetermined position by mounting a locking body that prevents the weight from dropping due to the opening of the holding body during an operation speed test. Even if it displaces and collides with the holding body to release the holding of the weight, the operation of the emergency stop device is prevented. Thereby, the operation speed test of the governor can be performed without disconnecting the governor rope and the safety device.

  According to the present invention, the operating speed test of the governor is performed by one person by running the car at a steady speed without removing the governor rope from the governor pulley or disconnecting the governor rope and the emergency stop device. Therefore, labor and labor costs required for the test can be reduced. Further, since the pendulum has a simple structure in which a weight is provided or attached, the apparatus can be made inexpensive.

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

  FIG. 1 is a front view showing a first embodiment of an elevator governor according to the present invention, and FIG. 2 is a schematic configuration diagram of an elevator provided with a governor.

  As shown in FIG. 2, the elevator car 1 moves in the hoistway 3 along the guide rail 2, and one end is connected to the car 1 and the other end is connected to the counterweight 4. 5 and a hoisting machine 7 set in the machine room 6 above the hoistway 3. The hoisting machine 7 winds and unwinds the main rope 5 and drives the car 1 up and down while balancing the weight by the counterweight 4. The machine room 6 is provided with a governor 8 that controls the abnormal acceleration of the car 1. A governor rope 9 connected to the safety device operating means 1 a of the car 1 is wound around the governor 8, and a governor tension pulley 10 that applies tension to the governor rope 9 is provided below the governor rope 9. The elevator is generally provided with a speed display function (not shown) for displaying the raising / lowering speed of the car 1.

  Further, as shown in FIG. 1, the governor 8 is a shaft-supported governor pulley 8a around which the governor rope 9 is wound, and when the governor pulley 8a rotates together with the governor pulley 8a and reaches a rotational speed higher than a predetermined value, a return biasing member, that is, a spring. When a pair of pendulums 8d that are displaced toward the outer diameter side of the governor pulley 8a against the restoring force of 8b, a connection link 8c that connects the pendulums 8d, and the displacement of the pendulum 8d are in the first predetermined position, That is, the contact 8e that collides with the pendulum 8d at the position of the pendulum 8d when the car 1 reaches 1.3 times the rated speed, interrupts the motor current and brakes the car 1, and the displacement of the pendulum 8d is second. Of the pendulum 8d at the position of the pendulum 8d when it reaches 1.4 times the rated speed of the car 1, and the holding body 8g. Held by In addition, the weight 8f that grips the governor rope 9 according to the release due to the collision between the pendulum 8d and the holding body 8g, brakes the governor rope 9, and pulls up the operation lever 1b connected to the governor rope 9 to operate the emergency stop device. And a weight 8h that is provided on the pendulum 8d and that can move in the rotation outer peripheral direction, a fixing screw 8i that fixes the weight 8h, and a latch that is attached during the operation speed test and prevents the weight 8f from dropping due to the release of the holding body 8g. And a body 8k.

In the elevator governor according to the first embodiment, when the governor operating speed test is performed, the operator places the weight 8h provided in the pendulum 8d on the rotating outer peripheral side as indicated by the arrow A in the figure, and the fixing screw 8i. The brake control circuit is short-circuited and the locking body 8k is mounted. Next, the worker outputs an operation command by the elevator control panel 10 provided in the machine room 6 to cause the car 1 to travel at a steady speed. At this time, since the weight 8h is located on the rotating outer peripheral side as described above, the centrifugal force acting on the pendulum 8d increases. That is, the centrifugal force F acting on the pendulum 8d has a relationship of F = m · v ² / r, where m is the mass of the pendulum 8d, v is the rotation speed, and r is the rotation radius of the pendulum center of gravity. By moving to the outer peripheral side, the rotational speed v of the center of gravity increases, and the centrifugal force F increases accordingly. Accordingly, when the speed of the car 1 reaches a constant speed lower than a predetermined speed, the pendulum 8d becomes the first predetermined position and collides with the contact 8e, and the speed of the car 1 further increases. When a certain speed lower than a predetermined speed is reached, the pendulum 8d becomes the second predetermined position and collides with the holding body 8g to release the weight 8f. At this time, the operator confirms the operation speed by the above-described speed display function and compares the value recorded on the nameplate 8j attached to the governor 8 with the measured value to determine pass / fail. That is, the operating speed when the weight 8h is positioned on the center side, the operating speed when the weight 8h is positioned on the rotating outer periphery side, and an allowable value are assigned to the nameplate 8j during the governor braking test. Even if the pendulum 8d collides with the contact 8e, the brake control circuit is short-circuited as described above, so that the brake does not operate, and even when the weight 8f is released, the weight 8f is stopped by the locking body 8k. The emergency stop device does not work because the fall of the door is blocked. After the governor operation speed test is completed, the operator once loosens the fixing screw 8i, positions the weight 8h on the center side of the governor pulley 8a, and fixes it again with the fixing screw 8i in this state, and removes the locking body 8k. Normal driving state.

  According to the first embodiment configured as described above, by moving the car 1 at a steady speed without removing the governor rope 9 from the governor pulley 8a or disconnecting the governor rope 9 and the emergency stop device. Since the operation speed test of the governor can be performed by one person, the labor and labor cost required for the test can be reduced. In addition, since the simple structure in which the weight 8h is provided on the pendulum 8d, the apparatus can be made inexpensive.

  FIG. 3 is a front view showing a second embodiment of the governor for an elevator according to the present invention. In addition, the same code | symbol is attached | subjected to the thing equivalent to what was shown in FIG. 1 mentioned above. That is, 8 is a governor, 8a is a governor pulley, 8b is a spring, 8c is a connecting link, 8d is a pendulum, 8e is a contact, 8f is a weight, 8g is a holding body, 8k is a locking body, and 8j is a nameplate.

  As shown in FIG. 3, the elevator governor according to the second embodiment includes a pendulum 8d having a removable weight 8L and a fixing screw 8m for fixing the weight 8L, and performs an operation speed test of the governor. At this time, by attaching the weight 8L and fixing with the fixing screw 8m, the centrifugal force acting on the pendulum 8d is increased, and the pendulum 8d is moved to the first predetermined position and the second predetermined speed below the predetermined speed. It can be displaced to a predetermined position, and the same effect as in the first embodiment can be obtained. In addition, by using the detachable weight 8L, it is possible to reliably prevent a malfunction in which the governor malfunctions due to excessive increase in the centrifugal force acting on the pendulum 8d during normal traveling of the car 1.

It is a front view which shows 1st Embodiment of the governor for elevators of this invention. It is a schematic block diagram of the elevator provided with a governor. It is a front view which shows 2nd Embodiment of the governor for elevators of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 5 Main rope 7 Hoisting machine 8 Governor 8a Governor pulley 8b Spring 8c Connection link 8d Pendulum 8e Contact 8f Weight 8g Holding body 8h Weight 8i Fixing screw 8k Locking body 8L Weight 8m Fixing screw

Claims (3)

A governor pulley on which a governor rope that moves in conjunction with the carriage is wound, and a governor pulley that rotates together with the governor pulley and rotates at a rotational speed higher than a predetermined speed against a restoring force of the return biasing member by centrifugal force. A pendulum that displaces to the outer diameter side, a contact that collides with the pendulum and interrupts the motor current to brake the car when the pendulum displacement reaches the first predetermined position, and the pendulum displacement is 2. A holding body installed at a position where the pendulum can collide with the pendulum when the predetermined position of 2 is reached, and is held by the holding body, and holds the governor rope according to the release due to the collision between the pendulum and the holding body. And an elevator governor equipped with a weight for operating the emergency stop device,
The pendulum is provided with a weight movable in the rotation outer peripheral direction, and the position of the weight is located on the rotation outer periphery side during the operation speed test, whereby the pendulum is moved to the first pendulum speed below a predetermined predetermined car speed. An elevator governor characterized by being displaceable to a predetermined position and the second predetermined position. A governor pulley on which a governor rope that moves in conjunction with the carriage is wound, and a governor pulley that rotates together with the governor pulley and rotates at a rotational speed higher than a predetermined speed against a restoring force of the return biasing member by centrifugal force. A pendulum that displaces to the outer diameter side, a contact that collides with the pendulum and interrupts the motor current to brake the car when the pendulum displacement reaches the first predetermined position, and the pendulum displacement is 2. A holding body installed at a position where the pendulum can collide with the pendulum when the predetermined position of 2 is reached, and is held by the holding body, and holds the governor rope according to the release due to the collision between the pendulum and the holding body. And an elevator governor equipped with a weight for operating the emergency stop device,
The pendulum is provided with a detachable weight, and by attaching the weight, the pendulum can be displaced to the first predetermined position and the second predetermined position at a predetermined predetermined car speed or less. An elevator governor characterized by that.   The elevator governor according to claim 1 or 2, wherein the elevator governor is mounted during an operation speed test and provided with a locking body that prevents the weight from falling due to the opening of the holding body, thereby preventing the operation of the emergency stop device.

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