JP2017105597A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device in which both of prevention of decrease in a degree-of-freedom of location of components of a speed governor and prevention of malfunction of the speed governor can be achieved.SOLUTION: An elevator device according to the present invention comprising a speed governor, in which the speed governor has a sheave, a flyweight which is provided on the sheave and is rotated synchronously with the sheave, and a switch for electrically stopping a car. The switch has a switch piece. The flyweight is displaced from a central axis of the sheave toward an outer diameter of the sheave by a centrifugal force of rotation of the sheave in association with enhancement of an elevational speed of the car, and when the speed reaches a prescribed value, the switch piece is rotated by an impact force generated by collision of a part of the flyweight with an end of the switch piece, whereby the switch is operated and the car is stopped.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an elevator apparatus provided with a speed governor.

  As background art in this technical field, there are the following Patent Document 1 and Patent Document 2. In the above-mentioned Patent Document 1, when the raising / lowering speed of the car reaches the first acceleration, the operating claw abuts on the switch lever of the car stop switch by turning the flyweight due to centrifugal force, and the switch lever is turned. An elevator governor having a configuration in which a switch is activated, a power source of a drive device is cut off, and a car is stopped by a brake device of the drive device is disclosed.

  Further, in Patent Document 2, when the lifting / lowering speed of the car reaches a first set value, for example, 1.3 times the rated speed, the outer diameter of the claw part of the governor weight is opposed to the balance spring by centrifugal force. The claw part abuts against the switch lever and activates the car stop switch, shuts off the power supply of the drive device that drives the car and activates the braking device to electrically raise and lower the car. An elevator governor to be stopped is disclosed.

Japanese Patent Laid-Open No. 2001-106454 JP 2005-89118 A

  As in the above-mentioned Patent Documents 1 and 2, when the raising / lowering speed of the car reaches a predetermined value, the operation lever of the flyweight or the claw portion of the governor weight constituting the governor is caused to collide with the switch lever. When the switch is operated to electrically stop the car, if the tip of the switch lever (the part that collides with the flyweight operating claw or governor weight claw, etc.) is flat, it is opened by centrifugal force. The switch lever is tilted by the frictional force generated when the flyweight or the governor weight is pressed against the tip portion. Therefore, if a drag is provided to cause the stop switch to fall, the flyweight or governor weight must be pressed against the tip of the switch lever with a large force in order to generate a large frictional force. A large vibration is generated in the flyweight or governor weight due to the reaction force against the pressing force. Such large vibrations cause malfunctions in other emergency stop means of the car.

  Like the elevator governor disclosed in Patent Document 2, the stop switch is arranged so that the rotation shaft (rotation center) of the stop switch is not directly above the rotation shaft of the sheave. In this case, since the flyweight can be caused to collide from the side surface of the switch lever, the rotation shaft of the stop switch can be rotated with a smaller reaction force than when the rotation shaft of the stop switch is disposed directly above the rotation shaft of the sheave. However, such adjustment of the component arrangement to prevent malfunctioning reduces the degree of freedom of component arrangement and leads to an increase in the size of the governor.

  Therefore, in view of the above circumstances, an object of the present invention is to provide an elevator apparatus capable of achieving both prevention of a reduction in the degree of freedom of arrangement of components of a governor and prevention of malfunction of the governor. .

  In order to achieve the above object, the present invention provides a main rope having one end connected to a car and the other end connected to a counterweight, and a hoisting machine around which the main rope is wound. A hoisting machine having a sheave, a governor rope that is connected to the car and goes up and down with the car, and a governor that has a sheave around which the governor rope is wound and brakes the car The speed governor includes the sheave, a flyweight that is provided on the sheave and rotates in synchronization with the sheave, and a switch that electrically stops the car. The switch has a switch body and a switch piece for operating the switch body, and the flyweight is at the center of the sheave by the centrifugal force of the sheave rotation as the elevator lift speed increases. From the shaft to the outer diameter of the sheave When the speed reaches a predetermined value, the switch is rotated by the collision force generated when a part of the flyweight collides with the end of the switch piece, so that the switch is operated and the car is moved. Provided is an elevator apparatus configured to stop.

  According to the elevator apparatus of the present invention, it is possible to achieve both prevention of a decrease in the degree of freedom of arrangement of components of the governor and prevention of malfunction of the governor.

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

It is the schematic which shows the elevator apparatus which concerns on Example 1. FIG. It is a front view which expands the governor of FIG. It is a schematic diagram which shows the switch of the conventional governor and its periphery. It is a schematic diagram which expands the switch of the governor of FIG. 2, and its periphery. It is the schematic diagram which expands the switch of the governor in the elevator apparatus which concerns on Example 2, and its periphery.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic diagram illustrating an elevator apparatus according to a first embodiment. As shown in FIG. 1, an elevator apparatus 100 according to a first embodiment of the present invention includes a car 3 that can move up and down in a hoistway 2 formed in a building 1, one end connected to the car 3, and the other end A hoisting machine (not shown) having a main rope 5 connected to the counterweight 4, a hoisting sheave (traction sheave) 6 around which the main rope 5 is wound, and the raising and lowering of the car 3 are guided. Guide rail 7 that is provided on the car 3, an emergency stop device 8 that holds the guide rail 7 in an emergency to make an emergency stop, and is pivotally supported on the car 3 side so as to drive the emergency stop device 8. An operating lever 9, an endless governor rope 10 that is connected to the operating lever 9 and is stretched over the entire elevator lifting / lowering stroke in the hoistway 2, and moves up / down with the passenger car 3. A governor rope 10 was wrapped around the top. Tone having a car 11 speed machine having a (X portion of FIG. 1). The elevator apparatus 100 according to the present invention is characterized by this speed governor. Hereinafter, the configuration of the governor will be described in detail.

  FIG. 2 is an enlarged front view of the governor of FIG. As shown in FIG. 2, the speed governor is supported by a support member 12 fixed to the top of the guide rail 7, and the support member 12 has a rotating shaft 13 that rotatably supports the sheave 11. It is fixed. A pair of flyweights 14 </ b> A and 14 </ b> B is rotatably attached to the side portion of the sheave 11, and has a configuration that rotates in synchronization with the sheave 11. The pair of flyweights 14A and 14B are connected by a connecting rod 15 and are regulated so as to perform the same movement. A claw portion 16A is formed at the end of the flyweight 14A, and a claw portion 16B is formed at the end of the flyweight 14B. When the car is lowered, the traveling direction of the governor rope and the sheave 11 becomes the direction indicated by the arrow 30.

  The flyweights 14A and 14B are held by a spring device (not shown), but the claw portions 16A and 16B of the flyweights 114A and 14B resist the spring device by the centrifugal force of the sheave 11 rotation. 11 is moved to the outer diameter side (displaced from the central axis of the sheave 11 toward the outer diameter of the sheave 11).

  A switch (stop switch) 17 for obtaining an electrical signal for operating a braking device (not shown) of a car drive device is attached to the upper portion of the support member 12. The stop switch 17 is connected to the claw portions 16A and 16B of the flyweights 14A and 14B when the lifting speed of the switch body 17a and the car 3 reaches a first set value, for example, 1.3 times the rated speed. It has a switch piece 17c that collides and activates the switch 17a, and a rotating shaft 17b of the switch piece 17c.

  When the switch piece 17c is rotated around its rotation shaft 17b, the stop switch 17 is configured to obtain an electrical signal that the elevator 3 has reached the first set value. .

  In addition, a governor rope stop device is provided below the support member 12. This governor rope stopping device is in a steady state when the detection unit 19 held in the state shown in FIG. 2 and the lowering speed of the car 3 reach a second set value, for example, 1.4 times the rated speed. A detection unit 20 that collides with the claws 16A and 16B and rotates the operating body 20 in the releasing direction, and is driven in a direction urged by a spring (not shown) when the operating body 20 is rotated in the releasing direction. And a governor rope stopper 21 for stopping the governor rope 10.

  Next, the operation of the governor described above will be described. The sheave 11 is rotated as the governor rope 10 circulates in synchronization with the raising and lowering of the car 3. At this time, the flyweights 14 </ b> A and 14 </ b> B receive centrifugal force corresponding to the rotational speed of the sheave 11, that is, the lifting speed of the car 3, while rotating together with the sheave 11. And if the raising / lowering speed of the cage | basket | car 3 becomes more than predetermined value, the nail | claw part 16A, 16B of flyweight 14A, 14B will displace to an outer-diameter side.

  Then, when the ascending / descending speed of the car 3 reaches a first set value, for example, 1.3 times the rated speed for some reason, the claw portions 16A, 16B of the flyweights 14A, 14B are tightened by the centrifugal force. It protrudes from the car 11, contacts (collises) with the switch piece 17c, rotates around the rotating shaft 17b, operates the stop switch 17 to shut off the power source of the driving device that drives the car 3, and releases the braking device. Operate to raise and lower the elevator car 3 electrically.

  On the other hand, for example, when the car 3 is lowered by cutting the main rope 5 and the descending speed reaches a second set value, for example, 1.4 times the rated speed, the sheave 11 rotates corresponding to this speed. The claw portions 16A and 16B of the flyweights 14A and 14B are further displaced to the outer diameter side of the sheave 11 by the centrifugal force generated by the above. Due to this displacement, the claw portions 16A and 16B collide with the detecting portion 19, rotate the operating body 20 clockwise to release the governor rope stopper 21, and rotate the governor rope stopper 21 biased by a spring (not shown). And press against the governor rope 10 to stop the movement of the governor rope 10.

  The operation lever 9 of the car 3 shown in FIG. 1 is pulled up by the stop of the governor rope 10 and the further lowering of the car 3. When the operating lever 9 is pulled up, the emergency stop device 8 provided on the car 3 is actuated to strongly grip the guide rail 7 and mechanically stop the car 3.

  The speed governor according to the present invention is characterized by the shape of the end of the above-described switch piece 17c (on the claw portions 16A and 16B of the flyweights 14A and 14B). Conventionally, as in Patent Documents 1 and 2, the shape of the end of the switch piece 17c has not been studied.

  Here, the shape of the conventional switch piece end will be described. FIG. 3 is a schematic diagram showing a conventional speed governor switch and its periphery. As shown in FIG. 3, conventionally, the tip of the switch piece 17c 'has a flat shape and is caused by the frictional force 26 generated by the collision with the claws 16A' and 16B 'of the flyweights 14A' and 14B '. The switch piece 17c ′ was rotating. Therefore, when a relatively large force (pressing force) 22 ′ is applied so that the rotational force is transmitted to the stop switch 17, a large vibration 24 ′ is generated in the flyweights 14 A ′ and 14 B ′ by the reaction force 25 ′. Will occur. Since such a large vibration 24 ′ is generated when the car 3 is raised and lowered, in the configuration shown in FIG. 2, the claw parts 16 </ b> A and 16 </ b> B collide with the detection part 19, and the lowering speed of the car 3 is increased. The operating body 20 is operated in the same manner as when the second set value is reached, and the speed governor malfunctions.

  Therefore, in order to prevent the malfunction described above, in the present invention, the shape of the tip of the switch piece 17c is such that the switch piece 17c is rotated by the collision force when it collides with the claws 16A and 16B of the flyweights 14A and 14B. It was. FIG. 4 is a schematic view enlarging the switch and its periphery of the governor of FIG. As shown in FIG. 4, when the car 3 is lowered, the end (tip) of the switch piece 17c has a line of action 22 of the collision force applied to the switch piece 17c by the flyweights 14A and 14B. A notch 18a is formed so as to face the direction 30 of rotation of the flyweights 14A, 14B from the contact portion between the claw portions 16A, 16B and the switch piece 17c. The collision force action line 22 is cut away so as to increase the distance from the rotation shaft 17b. In FIG. 4, the shape of the tip of the switch piece 17c is a shape having a notch 18a only on one side when the switch piece 17c is viewed from the direction of the rotation axis. This indicates that the action ship 22 of the collision force faces the direction in which the stop switch 17 is easily rotated. In other words, in the present invention, the main force for rotating the switch piece 17c is not a friction force but a collision force, and the stop switch 17c has a collision force smaller than the pressing force 22 'that generates the friction force 26 shown in FIG. It can be defeated. For this reason, the vibration 24 which generate | occur | produces in flyweight 14A, 14B resulting from the reaction force 25 can be suppressed rather than the case where it shows in FIG.

As a result, the conventional large vibration 24 'is suppressed, and it is possible to prevent the claw portions 16A and 16B shown in FIG. . Further, since the switch piece 17c only needs to have the shape as described above, there is no need to install the stop switch 17 so as to avoid the shaft 13 of the sheave 11 and the components of the governor. It is possible to prevent a reduction in the degree of freedom of arrangement of the. Thereby, the freedom degree of stop switch arrangement | positioning can be solidified and the dimension of a governor can be reduced.

  FIG. 5 is a schematic diagram for enlarging the governor switch and its periphery in the elevator apparatus according to the second embodiment. In addition, the code | symbol is abbreviate | omitted about the structure similar to FIG. 4 in a structure in a part of FIG. As shown in FIG. 5, the stop switch has a switch piece that collides with the claw portions 16 </ b> A and 16 </ b> B when the car 3 is raised and lowered as in the first embodiment. The tip of this switch piece is cut so that the line of action of the collision force increases with the rotation axis of the stop switch for both rotations of the flyweights 14A and 14B in the upward and downward directions of the car. A notch is formed. That is, the front end of the switch piece 17c has notches 18a and 18b formed on both sides when viewed from the front (from the direction of the rotation axis of the switch), and has a substantially V-shaped end surface.

  According to such a configuration, the flyweights 14A and 14B become the switch pieces when the raising / lowering speed of the car 3 becomes a predetermined value or higher in any of the upward and downward directions of the car. The vibration generated in the flyweights 14A and 14B can be suppressed by the reaction force generated by the collision, and the claw portions 16A and 16B collide with the detection unit 19 in the configuration shown in FIG. This can be prevented with a simple configuration.

  As described above, according to the elevator apparatus of the present invention, it is possible to achieve both prevention of a decrease in the degree of freedom of arrangement of components of the governor and prevention of malfunction of the governor.

  Note that the above-described embodiments have been specifically described in order to help understanding of the present invention, and the present invention is not limited to having all the configurations described. For example, 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. Further, a part of the configuration of each embodiment can be deleted, replaced with another configuration, or added with another configuration.

  Specifically, in the above embodiment, the case of the catch weight type speed governor has been described, but the traction type speed governor disclosed in Patent Documents 1 and 2 may be used. In the above embodiment, the stop switch 17 is installed directly above the sheave shaft, but the stop switch 17 is shifted from just above the sheave shaft within the scope of the present invention. It may be. Although the shape of the notch in the above embodiment is shown in FIGS. 4 and 5, it is not limited to this shape, and the switch piece 17c is rotated by the collision force applied to the switch piece 17c by the flyweights 14A and 14B. Any shape can be used as long as it can be used. As a shape of the switch piece 17c, FIG. 4 is configured to suppress the vibration of the flyweights 14A and 14B when the car is lowered, but to suppress the vibration of the flyweights 14A and 14B when the car is raised. 4 may have a shape symmetrical to that of FIG. Furthermore, although the case of an elevator apparatus having a machine room has been described in the above embodiment, an elevator apparatus having no machine room may be used.

  DESCRIPTION OF SYMBOLS 1 ... Building, 2 ... Hoistway, 3 ... Car, 4 ... Balance weight, 5 ... Main rope, 6 ... Roller sheave, 7 ... Guide rail, 8 ... Emergency stop device, 9 ... Actuating lever, 10 ... Speed governor rope, 11 ... sheave, 12 ... support member, 13 ... rotating shaft of sheave 11, 14A, 14B, 14A ', 14B' ... flyweight, 15 ... connecting rod, 16A, 16B, 16A ', 16B '... Claw, 17 ... Stop switch, 17a, 17a' ... Switch body, 17b, 17b '... Rotary axis of switch piece, 17c, 17c' ... Switch piece, 18a, 18b ... Notch, 19 ... Detector 20 ... Actuator, 21 ... Governor rope stopper, 22 ... Collision force, 22 '... Pushing force, 24, 24' ... Swing, 25, 25 '... Reaction force, 26 ... Friction force, 30 ... Progression of sheave 11 Direction, 100 ... Elevator device.

Claims (7)

A hoisting machine having a hoisting wheel for a hoisting machine around which a main rope whose hoistway is raised and lowered, one end connected to the car and the other end connected to a counterweight, and the main rope is wound around, An elevator comprising a governor rope connected to the car and moving up and down with the car, and a governor that has a sheave around which the governor rope is wound and brakes the car In the device
The speed governor includes the sheave, a flyweight that is provided in the sheave and rotates in synchronization with the sheave, and a switch that electrically stops the car.
The switch has a switch body and a switch piece for operating the switch body,
The flyweight is displaced from the central axis of the sheave toward the outer diameter of the sheave by the centrifugal force of rotation of the sheave as the raising / lowering speed of the car rises, and the speed becomes a predetermined value. The switch is actuated by rotating the switch piece by a collision force generated when a part of the flyweight collides with the end of the switch piece when reaching, and the car is stopped. An elevator device characterized by that. In the elevator apparatus according to claim 1,
At the end of the switch piece, a notch is formed so that the line of action of the collision force applied by the fly weight to the switch piece is directed from the contact portion between the fly weight and the switch piece in the direction of rotation of the fly weight. The elevator apparatus characterized by being made. In the elevator apparatus according to claim 1,
The end of the switch piece is such that the line of action of the collision force applied to the switch piece by the fly weight is directed in the direction of rotation of the fly weight from the contact portion between the fly weight and the switch piece, and the switch piece is rotated. An elevator apparatus characterized in that a notch is formed so as to increase the distance from the shaft.   The elevator apparatus according to any one of claims 1 to 3, wherein the rotational traveling direction is a direction when the car is lowered.   The elevator apparatus according to any one of claims 1 to 3, wherein the rotational traveling direction is a direction when the car is raised and a direction when the car is lowered.   5. The elevator apparatus according to claim 4, wherein the end of the switch piece has a notch on only one side when viewed from the rotation axis direction of the switch piece.   6. The elevator apparatus according to claim 5, wherein the end portion of the switch piece has notches on both sides when viewed from the rotation axis direction of the switch piece.

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