JP6552954B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus provided with a 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 for stopping is disclosed.

JP 2001-106454 A 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 such that the rotation axis (rotation center) of the stop switch does not come directly above the rotation shaft of the sheave. In this case, since the flyweight can be made to collide from the side surface of the switch lever, it can be rotated with a smaller reaction force than in the case where 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 the prevention of a decrease in the degree of freedom of arrangement of components of a governor and the 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 a other end connected to a counterweight, and a hoisting machine having the main rope wound thereon, which lifts and lowers a hoistway. A hoist having a sheave, a governor rope connected to a riding car and moving up and down with the riding car, a governor having a sheave on which the governor rope is wound and braking the riding car In the elevator apparatus, the speed governor has the sheave, a flyweight provided on the sheave, which rotates in synchronization with the sheave, and a switch for electrically stopping 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 due to the centrifugal force of the rotation of the sheave as the raising and lowering speed of the car increases. From the shaft to the outer diameter of the sheave When the speed reaches a predetermined value, a part of the flyweight collides with the end of the switch piece to rotate the switch piece by the collision force that is generated to operate the switch and the cage The switch piece is configured to stop, and an end portion of the switch piece has a line of action of a collision force applied by the fly weight to the switch piece from a contact portion of the fly weight and the switch piece. The present invention provides an elevator apparatus characterized in that a notch portion is formed to face .

  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.

FIG. 1 is a schematic view showing an elevator apparatus according to a first embodiment. It is a front view which expands the speed 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 is connected to a car 3 capable of moving up and down in a hoistway 2 formed in a building 1 and one end connected to the car 3 Guides the raising and lowering of the car 3 with a hoist (not shown) having a main rope 5 connected to the counterweight 4 and a hoist sheave (traction sheave) 6 on which the main rope 5 is wound Guide rail 7, an emergency stop device 8 provided on the car 3 for gripping the guide rail 7 in an emergency to perform an emergency stop, and pivotally supported on the car 3 side to drive the emergency stop device 8. Actuating lever 9, an endless governor rope 10 connected to the actuating lever 9 and stretched across the entire elevator elevator stroke in the hoistway 2 and moving up and down with the cage 3; It was pivotally supported at the top and wound the governor rope 10 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 governor is supported by a support member 12 fixed to the top of the guide rail 7, and the support member 12 has a rotary shaft 13 on which a sheave 11 is rotatably supported. 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 fly weights 14A and 14B are held by a spring device (not shown), but the centrifugal force of the rotation of the sheave 11 causes the claw portions 16A and 16B of the fly weights 114A and 14B to resist the spring device. 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.

  The stop switch 17 is configured to obtain by an electrical signal that the lifting and lowering speed of the car 3 has reached the first set value when the switch piece 17c is rotated about its rotation shaft 17b. .

  In addition, a governor rope stop device is provided below the support member 12. This governor rope stop device operates when the descent speed of the passenger cage 3 reaches a second set value, for example, 1.4 times the rated speed, in the steady state, the detection unit 19 held in the state shown in FIG. 2. 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 above-described governor 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 projects from the car 11, contacts (collisions) with the switch piece 17c and rotates around the rotation shaft 17b, operates the stop switch 17 and shuts off the power supply of the drive unit that drives the car 3 It is operated to electrically stop raising and lowering of the car 3.

  On the other hand, for example, when the main car 5 is lowered by cutting the main rope 5 and the lowering speed reaches a second set value, for example, 1.4 times the rated speed, the rotation of the sheave 11 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 claws 16A and 16B collide with the detection unit 19 and rotate the working body 20 clockwise to release the governor rope stopper 21 and rotate the governor rope stopper 21 biased by the 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 '. It was rotating switch piece 17c '. 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 at the fly weights 14A 'and 14B' by the reaction force 25 '. It 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 erroneous operation described above, in the present invention, the shape of the tip of the switch piece 17c is rotated by the collision force when it collides with the claws 16A and 16B of the fly weights 14A and 14B. And FIG. 4 is a schematic view enlarging the switch and its periphery of the governor of FIG. As shown in FIG. 4, at the time of lowering of the car 3, at the end (tip) of the switch piece 17c, the action line 22 of the collision force that the fly weights 14A and 14B give to the switch piece 17c is of the fly weights 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. That is, in the present invention, the main force for rotating the switch piece 17c is not the friction force but the collision force, and the stop switch 17c is performed with a collision force smaller than the pressing force 22 'that generates the friction force 26 shown in FIG. It shows that you can beat it. 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, a large vibration 24 'as in the prior art is suppressed, and the claws 16A and 16B shown in FIG. 2 can be prevented from colliding with the detecting portion 19 and causing the working body 20 to malfunction with a simple configuration. . In addition, since the switch piece 17c only needs to have the shape as described above, it is not necessary to install the stop switch 17 so as to avoid directly above the rotary shaft 13 of the sheave 11, and the components of the governor It is possible to prevent a decrease in the degree of freedom in the placement of 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 becomes larger in distance to the axis of rotation of the stop switch with respect to both rotations of the fly weights 14A and 14B in the ascending and descending directions of the car. A notch is formed. That is, when viewed from the front (in the direction of the rotary shaft of the switch), notches 18a and 18b are formed on both sides of the tip of the switch piece 17c, which is a substantially V-shaped end face.

  According to such a configuration, the flyweights 14A and 14B serve as switch pieces when the elevating speed of the car 3 becomes equal to or more than a predetermined value in any of the ascending and descending 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 the prevention of a decrease in the degree of freedom in the arrangement of the component parts of the governor and the malfunction prevention 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 installation location of the stop switch 17 is immediately above the rotation shaft of the sheave, but the installation location of the stop switch 17 is shifted from immediately above the rotation shaft of the sheave within the range where the effects of the present invention can be obtained. 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. It may have any shape as long as it can be used. Although the configuration of the switch piece 17c is configured to suppress the vibration of the fly weights 14A and 14B when the car is lowered, FIG. 4 is for suppressing the vibration of the fly weights 14A and 14B when the car is raised. , And may have a symmetrical shape with 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 ... riding cage, 4 ... balance weight, 5 ... main rope, 6 ... hoisting machine sheave, 7 ... guide rail, 8 ... safety device, 9 ... actuation 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 equipment.

Claims (6)

A hoisting machine having a main rope having one end connected to the car and the other end connected to a counterweight, and a hoisting sheave having the main rope wound thereon; An elevator comprising: a governor rope connected to the riding car and moving up and down with the riding car; and a governor having a sheave on which the governor rope is wound and braking the riding car In the device
The speed governor includes the sheave, a fly weight provided on the sheave and rotating in synchronization with the sheave, and a switch electrically stopping the car.
The switch includes 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 the rotation of the sheave as the raising and lowering speed of the riding cage increases, and the raising and lowering speed is a predetermined value When the switch weight is reached, the switch piece is rotated by a collision force generated by a part of the flyweight colliding with the end of the switch piece and the switch is actuated to stop the car Has been
The end of the switch piece is formed with a notch so that the line of action of the impact force that the fly weight applies to the switch piece is directed from the contact portion of the fly weight and the switch piece to the rotational advancing direction of the fly weight. The elevator apparatus characterized by being . In the elevator apparatus according to claim 1,
The end of the switch piece, before Symbol elevator apparatus characterized by notches to increase the distance between the rotation axis of the switch piece is formed. The elevator apparatus according to claim 1 or 2 , wherein the direction of rotation is a direction when the car is lowered. The elevator apparatus according to claim 1 or 2 , wherein the direction of rotation is a direction when the car is raised and a direction when the car is lowered. The elevator apparatus according to claim 3 , wherein the end of the switch piece has a notch on only one side when viewed from the direction of the rotation axis of the switch piece. 5. The elevator apparatus according to claim 4 , wherein the end of the switch piece has notches on both sides when viewed from the rotation axis direction of the switch piece.

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