JP5917764B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus, and more particularly, to an elevator apparatus including a governor capable of setting an overspeed during an ascending operation and an overspeed during a descending operation to different values.

  In general, an elevator apparatus is provided with a speed governor that constantly monitors the ascending / descending speed of a car and makes an emergency stop of the car when the car falls into a predetermined overspeed state. Specifically, the speed governor, when the raising / lowering speed of the car exceeds the rated speed and reaches the first overspeed (usually 1.3 times the rated speed), the power supply of the hoisting machine that drives the car, and this Each power supply of the control device that controls the hoisting machine is shut off. In addition, when the speed at which the car descends exceeds the first overspeed and reaches the second overspeed (usually 1.4 times the rated speed) for some reason, the governor turns off the emergency stop device provided on the car. Operate and mechanically stop the car.

  By the way, in recent years, the speed and length of the elevator apparatus have been increased along with the increase in the number of buildings, and in such an elevator apparatus, a sudden change in atmospheric pressure occurs due to the raising and lowering of the car, and the passengers can hear it. Gives a steady sense of ear closure. Since the human ear is more adaptable to the side where the air pressure decreases, i.e. when the car rises, than the side where the air pressure increases, i.e. when the car descends, the rated speed in the downward direction is lower than the rated speed in the upward direction. There is a need for an elevator device that is set low and reduces the feeling of ear closure. And as such an elevator apparatus, the elevator apparatus described in Unexamined-Japanese-Patent No. 2000-327241 (patent document 1) is proposed.

  Patent Document 1 discloses a speed control rope connected to an elevator car, a sheave around which the speed control rope is wound, a first speed control mechanism that controls the rotational speed of the sheave, and a sheave. A speed control device including a second speed control mechanism that is connected to the horizontal shaft of the main shaft via a clutch mechanism and adjusts the rotational speed of the sheave when the rotational force of the sheave is transmitted is described. In Patent Document 1, when the sheave rotates normally (when the elevator car is lowered), the clutch mechanism transmits the rotational force of the sheave to the second speed governor and reverses (when the elevator car is raised). In this case, the transmission of the rotational force is canceled, the first speed governing mechanism detects the overspeed at the time of ascending, the second speed governing mechanism detects the overspeed at the time of descending, and the moving direction of the elevator car Depending on the system, different values of overspeed can be detected.

JP 2000-327241 A

  As a clutch mechanism, Patent Document 1 exemplifies a one-way clutch and the like. In the rotating body of the second speed control mechanism, the transmission of the horizontal shaft of the sheave is released by the clutch mechanism during the lift operation of the elevator. When used, even during the ascending operation, the rotation of the horizontal axis is gradually transmitted to the rotating body of the second speed governing mechanism due to the frictional resistance, and the second speed governing mechanism may be in the speed controlling state. In particular, the descending overspeed is set to be smaller than the ascending overspeed, so if the sheave rotation during the ascending operation that rotates at high speed is transmitted to the second governing mechanism by friction resistance, the descending overspeed is erroneously detected. As a result, the elevator may stop abnormally.

  Further, when stopping on the middle floor during the descent operation, the transmission of the sheave is released by the clutch mechanism and the second speed governing mechanism becomes idle, but the rotating body of the second speed governing mechanism continues to rotate due to inertia, Stop gently. For this reason, when the rotating body of the second speed governing mechanism continues to rotate due to inertia, the clutch mechanism meshes with the rotating body of the second speed governing mechanism when the operation is again lowered. Therefore, there is a possibility that an impact sound is generated or a load is applied to the apparatus due to the impact, resulting in damage.

  An object of the present invention is to provide a first speed governor for detecting an overspeed during an ascending operation and a second speed governor for detecting an overspeed during a descending operation, and the sheave of the sheave via a cam type one-way clutch. To provide an elevator apparatus capable of preventing the second governor from erroneously detecting the descending overspeed during the ascending operation in the elevator apparatus configured to transmit the rotation to the second governor. It is in.

  Another object of the present invention is to prevent the second governor from erroneously detecting the descending overspeed during the ascending operation, and further to the governor when shifting to the descending operation. An object of the present invention is to provide an elevator apparatus capable of suppressing the application of an impact.

  The present invention is characterized by having a rotation prevention mechanism that prevents the rotating body of the second governor from rotating during the ascending operation.

  In addition, the present invention is characterized by having a rotation prevention mechanism that prevents the rotating body of the second governor from rotating when the transmission of the sheave to the second governor is released. To do.

  According to the present invention, it is possible to prevent the second speed governor from erroneously detecting the descending overspeed during the ascending operation.

  Further, according to the present invention, it is possible to prevent the second speed governor from erroneously detecting the descending overspeed during the ascending operation, and further, when the transition to the descending operation is performed, there is an impact on the governor. It is possible to suppress the addition.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is front sectional drawing of the speed governor in the elevator apparatus of Example 1 of this invention. It is a side view of a rotation prevention mechanism in Example 1 of the present invention. It is front sectional drawing of the speed governor in the elevator apparatus of Example 2 of this invention. It is a side view of the rotation prevention mechanism in Example 2 of the present invention. It is front sectional drawing of the speed governor in the elevator apparatus of Example 3 of this invention. 1 is a schematic side view of an elevator apparatus to which the present invention is applied.

  Embodiments of an elevator apparatus according to the present invention will be described below with reference to the drawings.

  First, a schematic configuration of an elevator apparatus to which the present invention is applied will be described with reference to FIG.

  In general, an elevator apparatus connects a lifting body (cage) 300 and a counterweight 400 in a hoistway 200 provided in a building 1000 by a main rope 500, and the lifting body 300 can be lifted and lowered along a guide rail 700. It is comprised so that. In the machine room 100 formed in the upper part of the hoistway 200, a hoisting machine 600 around which the main rope 500 is wound, a control panel (not shown) for controlling the hoisting machine 600, a speed governor, and the like are arranged. ing. The speed governor includes an endless speed control rope 1 stretched over the entire lifting stroke in the hoistway 200, a sheave 4 installed in the machine room 100 and wrapped around the speed control rope 1, and the like. Composed. The lifting body 300 is provided with an emergency stop device 800 that grips the guide rail 700 with a wedge in an emergency, and an operating lever 900 that drives the safety stop device 800 and is pivotally supported on the lifting body 300 side. The speed control rope 1 is connected to the operation lever 900. Note that the elevator apparatus to which the present invention is applied is not limited to the configuration shown in FIG. For example, a speed governor may be installed at a fixed portion (for example, the top of the guide rail 700) at the top of the hoistway 200 without providing a machine room above the hoistway 200.

  Next, the governor in the elevator apparatus of the present embodiment will be described. As shown in FIG. 1, a speed control rope 1 which is endless and is arranged in a hoistway and connected to a lifting body, and a sheave 4 fixed to a horizontal shaft 3 and wound around the speed control rope 1. And the first governor A that regulates the rotational speed of the sheave 4 and detects the overspeed, and is connected to the horizontal shaft 3 via the clutch 5, and the sheave is lowered when the elevator is lowered. The second governor B that regulates the rotational speed 4 and detects the descending overspeed, the encoder 6 attached to the horizontal shaft 3, and the rope to the second governor such as during the ascending operation of the lifting body A rotation prevention mechanism 7 is provided for preventing the rotation of the rotating body B1 of the second governor B when the rotation of the vehicle is released.

  For example, the horizontal shaft 3 is supported by a frame 2 provided on the top of the guide rail via a bearing. The rotating body A1 of the first governor A is fixedly provided on one side of the horizontal shaft 3, and the rotating body B1 of the second governor B is attached to the other side of the horizontal shaft 3 via the clutch 5. It has been. As the clutch 5, a cam type one-way clutch (cam clutch) is used, and an inner ring of the cam type one-way clutch is fixed to the horizontal shaft 3, and an outer ring is fixed to the rotating body B1. The clutch 5 transmits the rotation of the sheave 4 to the rotating body B1 of the second governor during the descending operation of the elevator, and the sheave 4 to the second governor during the ascending operation of the elevator. Release the rotation.

  The first speed governor A includes a rotating body A1 and a pendulum (not shown) that is attached to the rotating body A1 and is displaced according to the rotational speed of the rotating body A1. The second governor B includes a rotating body B1 and a pendulum (not shown) that is attached to the rotating body B1 and is displaced according to the rotational speed of the rotating body B1. When the elevator speed of the car reaches 1.3 times the rated speed, the first governor A is configured such that the car stop switch in the first governor A is turned on due to the displacement of the pendulum. It is configured to detect that the car's lifting speed has reached 1.3 times the rated speed. Further, in the second governor B, when the raising / lowering speed of the car reaches 1.3 times the rated speed, the car stop switch in the second governor B is turned on due to the displacement of the pendulum. It is configured as described above, and it is detected that the ascending / descending speed of the car has reached 1.3 times the rated speed. As the first speed governor A and the second speed governor B, specifically, for example, a flyweight speed control mechanism as described in Patent Document 1 is used, but is not limited to this. Absent.

  The elevator apparatus of the present embodiment reduces the rated speed in the descending direction from the rated speed in the ascending direction in order to reduce the feeling of closing the ears of the passenger due to a sudden change in atmospheric pressure due to the lifting and lowering of the elevator car, that is, the elevator car. It is set. In response to this, when the first speed governor A for lifting detects that the lifting speed of the car has reached 1.3 times the rated speed in the rising direction, the hoisting machine that drives the car And the control device for controlling the hoisting machine are respectively cut off.

  On the other hand, when the second speed governor B for descent detects that the raising / lowering speed of the car has reached 1.3 times the rated speed in the descending direction, the power supply of the hoisting machine that drives the car and The power supply of the control device that controls the hoisting machine is shut off. Further, the second governor B operates the emergency stop device provided in the car to operate the car mechanically when the descending speed of the car reaches 1.4 times the rated speed for some reason. Emergency stop. That is, when the pendulum attached to the rotating body B1 is further displaced, the movement of the speed adjusting rope 1 is stopped by sandwiching the speed adjusting rope 1 by a mechanism such as that described in Patent Document 1, for example. Then, as shown in FIG. 6, the operating lever 900 connected to the speed regulating rope 1 that has stopped moving is pulled up by the further lowering of the lifting body 300, and the emergency stop device 800 is operated by the pulled up operating lever 900. Then, the guide rail 700 is gripped by a wedge (not shown), and the elevator 300 is mechanically stopped in an emergency. In the second speed governor B, the clutch 5 releases the rotation of the sheave 4 during the ascending / descending operation of the lifting body and stops the speed control.

  Thus, in order to detect the predetermined overspeed in the upward direction and to detect the predetermined overspeed in the downward direction, the first speed governor A for increasing and the second speed governor B for decreasing The speed setting value is set to a different value.

  Next, the rotation prevention mechanism in the present embodiment will be described. As described above, in this embodiment, when the transmission of the sheave to the second speed governor is released, such as during the ascending operation of the lifting body, the rotation of the rotating body B1 of the second speed governor B is performed. A rotation preventing mechanism 7 for blocking is provided.

  As shown in FIGS. 1 and 2, the rotation preventing mechanism 7 includes a roller 7a provided coaxially with the rotating body B1, and a pressing force applying device 7b that applies a pressing force to the roller 7a. The roller 7a is fixed to the outer ring of the rotating body B1 or the cam type one-way clutch, and rotates together with the rotating body B1. The pressing force applying device 7 b is fixed to the frame 2 via a pedestal 70.

  The pressing force applying device 7b includes a shoe 72a that slidably contacts the roller 7a, a spring 73 that presses the shoe 72a toward the roller 7a, and a housing 74 that supports the shoe 72a and the spring 73. . The shoe 72a is attached to the housing 74 so as to be rotatable about a bolt 72b. The spring 73 is attached to the bracket portion 74 a of the housing 74 via a spring adjustment screw 75.

  The shoe 72a is pressed so as to be always in contact with the roller 7a, and biases a predetermined resistance to the rotating body B1 of the second governor B through the roller 7a. During the ascending operation of the car, the second governor B is in a state in which the rotation of the horizontal shaft 3 is released by the clutch 5, but due to the frictional resistance acting in the clutch 5 (between the inner ring and the outer ring). The rotating body B1 tries to rotate. The resistance value by the rotation prevention mechanism 7 is set so as to prevent the rotation of the rotating body B1. In other words, this resistance value is the resistance of the rotation prevention mechanism 7 (the frictional resistance between the roller 7a and the shoe 72a) when the rotation of the horizontal shaft 3 to the rotating body B1 is released by the clutch 5 during the ascending operation. ) To prevent the rotating body B1 from rotating.

  In addition, the resistance value by the rotation prevention mechanism 7 is set to a value that does not hinder the rotation of the rotating body B1 when the clutch 5 is engaged during the descending operation. Actually, the resistance received by the rotating body B1 by the rotation prevention mechanism 7 during the descending operation is small compared to the rotational force of the horizontal shaft 3, and this hinders the rotation of the rotating body B1 during the descending operation. It is not something that brings

  According to the present embodiment, during the ascending operation of the car, the rotation prevention mechanism 7 prevents the rotation of the rotating body B1 of the second governor B, thereby preventing erroneous detection and improving reliability. Can do. In addition, even if the re-descent operation is performed immediately after the stop during the descent operation, in the present embodiment, the rotation of the rotating body B1 of the second governor B is quickly performed when the descent operation is stopped on the intermediate floor. Since it is blocked, the clutch 5 always meshes with the rotating body B1 of the second governor B that is in a stopped state. As a result, in this embodiment, the impact at the time of meshing can be reduced, the noise can be reduced, the load on the apparatus can be reduced, and the life can be extended.

  In this embodiment, in order to prevent the rotation of the rotating body B1 of the second governor B, a pressing force is applied to the roller 7a provided coaxially with the rotating body B1. A pressing force may be directly applied to B1. That is, in this embodiment, the rotating body B1 or the rotating body B1 is provided coaxially, and a pressing force is applied to the rotating body that rotates together with the rotating body B1.

  Next, an elevator apparatus according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the thing equivalent to what is shown in Example 1. FIG. Further, the description of the same configuration as that of the first embodiment is omitted.

  The elevator apparatus of the present embodiment includes a rotation prevention mechanism 17 having a structure different from that of the rotation prevention mechanism 7 shown in the first embodiment. As shown in FIGS. 3 and 4, the rotation prevention mechanism 17 includes a first roller 171 provided coaxially with the rotating body B <b> 1 and a second roller disposed so as to face the first roller 171. 172, a belt 173 wound around the first roller 171 and the second roller 172, a roller bracket 174 attached to the frame 2 and rotatably supporting the second roller 172, And a spring 175 for biasing the second roller 172 in a direction opposite to that of the first roller.

  The first roller 171 is fixed to the rotating body B1 or the outer ring of the cam type one-way clutch, and rotates together with the rotating body B1. The second roller 172 is rotatably supported by the roller bracket 174 via a shaft 176. The roller bracket 174 is rotatably attached to the base 170 via a shaft 177. A base 170 to which the roller bracket 174 is attached is fixed to the frame 2 (not shown in FIG. 3). The spring 175 is provided between a spring mounting portion 179 fixed to the pedestal 170 and a spring mounting portion 180 fixed to the roller bracket 174, and the spring force is adjusted by the spring adjustment screw 178.

  In this embodiment, the second roller 172 is urged in the direction opposite to the first roller 171, thereby increasing the tension applied to the belt 173 and causing resistance to the rotating body B 1 via the first roller 171. Energized. This resistance value is adjusted by the spring adjustment screw 178 in the same way as in the first embodiment.

  In the present embodiment, a first roller 171 is provided coaxially with the rotating body B1, and a belt 173 that is pulled by the second roller in a direction opposite to the first roller is wound around the first roller 171. By being applied, a predetermined resistance is applied to the rotating body B1 of the second governor. As a result, the same effect as in the first embodiment can be obtained.

  Next, a third embodiment of the elevator apparatus according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the thing equivalent to what is shown in Example 1 or Example 2. FIG. Further, the description of the same configuration as in the first and second embodiments is omitted.

  The rotation prevention mechanism 27 in this embodiment includes a second roller 272 that is fixed to the outer ring of a cam type one-way clutch (cam clutch) 273 instead of the second roller 172 in the second embodiment. A pedestal having a shaft to which the inner ring of the cam type one-way clutch 273 is fixed is fixed to the frame 2. The cam type one-way clutch 273 allows the second roller 272 to rotate in the same direction as the first roller 171, that is, the rotating body B <b> 1 during the lowering operation of the lifting body, and the second one during the lifting operation of the lifting body. The roller 272 is prevented from rotating in the opposite direction.

  Therefore, in the present embodiment, during the ascending operation, the rotation of the rotating body B1 is prevented, and the same effects as those of the first and second embodiments can be achieved.

  Further, if a mechanism (not shown) for applying tension to the belt 173 is provided, the resistance can be effectively urged to the rotating body B1, and it is performed when the descent operation is shifted to the descent operation after stopping. The same effects as in Example 1 and Example 2 can be achieved.

  Next, a fourth embodiment of the elevator apparatus according to the present invention will be described. In this embodiment, the cam type one-way clutch similar to that of the third embodiment is provided on the shaft 176 connecting the second roller 172 and the roller bracket 174 in the second embodiment.

  In the present embodiment, the same effects as those of the first and second embodiments can be obtained. In particular, in this embodiment, it is possible to reliably prevent the rotating body B1 from rotating in the upward direction during the ascending operation. And in a present Example, compared with Example 3, when stopping to the middle floor during descent | fall operation | movement, rotation of the rotary body B1 of the 2nd governor B can be blocked | prevented rapidly. Therefore, it is possible to reliably prevent the second speed governor from erroneously detecting the descending overspeed during the ascending operation, and to reliably suppress the impact from being applied to the speed governor when shifting to the descending operation. be able to.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  1 speed control rope, 3 horizontal axis, 4 sheave, 5 clutch, 7 rotation prevention mechanism, 17 rotation prevention mechanism, 27 rotation prevention mechanism, A 1st speed governor, A1 rotating body, B 2nd speed control Machine, B1 rotating body

Claims (5)

A speed control rope connected to the lifting body, a sheave fixed to a horizontal shaft and wound with the speed control rope, and a rotational speed of the sheave are controlled to detect an overspeed. A second speed governor that is connected to the horizontal shaft via a clutch, and that regulates the rotational speed of the sheave and detects a descending overspeed during the lowering operation of the lifting body; The clutch transmits the rotation of the sheave to the rotating body of the second governor during the descending operation of the lifting body, and the second governor during the ascending operation of the lifting body. In an elevator apparatus adapted to cancel transmission of rotation of the sheave to the
An elevator apparatus comprising a rotation prevention mechanism for preventing rotation of the rotating body of the second governor during the ascending operation of the elevating body. The elevator apparatus according to claim 1,
The rotation preventing mechanism prevents the rotation of the rotating body of the second speed governor when the transmission of the rotation of the sheave to the second speed governor is released. . The elevator apparatus according to claim 2,
The said rotation prevention mechanism always urges resistance to the roller which rotates together with the rotary body of the said 2nd speed governor, or the said rotary body together, The elevator apparatus characterized by the above-mentioned. The elevator apparatus according to claim 3,
The rotation preventing mechanism includes the roller, a roller different from the roller, and an endless belt wound around the roller and the other roller, and the another roller is provided with a cam type one-way clutch. An elevator apparatus, characterized in that the cam-type one-way clutch is supported by a shaft and prevents the other roller from rotating in the direction opposite to the downward rotation of the rotating body of the second governor. The elevator apparatus according to claim 1,
The rotation prevention mechanism includes a roller that rotates coaxially with the rotating body of the second speed governor, a roller different from the roller, and an endless belt wound around the roller and the other roller. And the other roller is supported by a shaft to which a cam type one-way clutch is attached, and the another roller is opposite to the downward rotation of the rotating body of the second governor. An elevator apparatus characterized in that it prevents rotation to the side.

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