JP5325857B2 - Elevator braking device and elevator device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a braking device for an elevator, which can move an elevating body when a power supply for energizing an actuator of the braking device cannot be secured, and to provide an elevator device using the braking device. <P>SOLUTION: The braking device 10 of the elevator and the braking device 10 equipped with the elevator device are arranged in a pair facing each other and includes: operating arms 14 provided rotatably around a shaft 11 serving as a fulcrum; an operating braking part 17; a spring 15; an actuator 16; and a braking member for braking the elevating body in association with the contact of the operating braking part 17 with a pressed member 7. The braking device for the elevator is provided at the elevating body, and an invalidating stopper 22 preventing the contact of the operating braking part 17 with the pressed member 7 against the spring force of the spring 15 of the operating arms 14 can be mounted in the intercepted state of energization to the actuator 16. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to an elevator braking device and an elevator device using the same, and more particularly to a braking device using an actuator.

  As an actuator that uses an actuator to brake the lifting body, the actuator has an operating force that resists the spring force, and the power is shut off under a predetermined condition. Some have a brake that contacts and decelerates and stops the lifting body. And when the raising / lowering speed exceeds a predetermined value or when the elevating body travels in an uncontrolled state, it is mentioned that a device using such an actuator is applied to brake the elevating body. .

  Conventionally, this type of elevator is guided by a guide rail standing on a hoistway, and the guide rail is braked when the descending speed of the elevator provided on the elevator exceeds a specified value. In an elevator apparatus equipped with a braking device that brakes the lifting body by generating a braking force by pinching with a child, a first braking unit that presses the guide rail to brake the lifting body, and a lowering speed of the lifting body is predetermined. There is a second braking unit that moves to the first braking unit side when the value is exceeded and operates the brake element of the first braking unit, and the second braking unit energizes the actuator during normal operation of the elevator apparatus. For example, Japanese Patent Application Laid-Open No. 2004-133867 discloses a mechanism that displaces the actuator by shutting off the power when the descending speed of the elevating body exceeds a predetermined value.

JP 2009-46246 A

  In the above-described conventional device, in order to move the lifting body when the power to be supplied to the actuator of the braking device cannot be secured, the braking device must be invalidated. For that purpose, the brake at the end of the second braking unit is required. Must be separated from the guide rail against the spring force. Such a case is assumed when, for example, a state in which the car must be moved in a state where the power supply to the actuator is cut off for maintenance is performed.

  The present invention has been made in accordance with the above-described prior art, and an object of the present invention is to provide an elevator braking device that can move an elevator when a power source for energizing an actuator of the braking device cannot be secured, and an elevator using the same. To provide an apparatus.

The brake device for an elevator according to the present invention and the brake device provided in the elevator device are arranged in pairs so as to face each other, and are provided with an operating arm that is rotatably provided with a shaft as a fulcrum, An actuating brake disposed at an end, a spring for applying a force to the actuating arm to bring the actuating brake into contact with the pressed member, and the actuating brake against the spring force of the spring An actuator that applies a force in a direction to pull the actuator away from the pressed member to the operating arm, and a braking member that brakes the elevator when the operating braking unit contacts the pressed member. to the elevator braking device provided, and link shaft attached to said actuator, said actuating a and the operation of the actuator attached to the link shaft Provided an actuating arm engaging portion linking the rotation of the arm, with the energization is interrupted to the actuator, the actuating brake contacts said the pressed member against the spring force of the spring It is possible to attach a disabling stopper for preventing the movement between the operating arm and the operating arm locking portion .

  ADVANTAGE OF THE INVENTION According to this invention, when the power supply which supplies with electricity to the actuator of a brake device cannot be ensured, a brake device and an elevator device which can invalidate a brake device easily and can move a raising / lowering body can be provided.

It is a schematic block diagram of the elevator apparatus of this invention. It is a principal part schematic top view which shows one Embodiment of the braking device of the elevator which concerns on this invention. It is a principal part schematic front view of the braking device in this embodiment. FIG. 3 is a top view of essential parts of the operating arm and actuator of FIG. 2. It is a principal part top view of an operation arm and an actuator when a brake and a guide rail are made to contact. It is a principal part schematic front view of the braking device when the brake element and guide rail in this embodiment are made to contact. FIG. 3 is a top view of the essential parts of the operating arm and actuator of FIG. 2 when a disabling stopper is attached. FIG. 6 is a detailed view of an invalidation stopper.

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

  As shown in FIG. 1, the elevator apparatus in this embodiment is provided with a hoisting machine as a driving device provided in the machine room 1, and a sheave 2 attached to the hoisting machine, a car 4 and a balance. A rope 3 is wound around a deflecting wheel 9 that secures a predetermined distance around the weight 5. A car 4 and a counterweight 5, which are elevating bodies that move up and down in the hoistway 6, are connected to both ends of the rope 3, respectively. The car 4 is guided in the hoistway 6 by a car-side guide rail 7, and the counterweight 5 is guided by a counterweight-side guide rail 8, and the sheave 2 of the hoisting machine is rotated. The car 4 and the counterweight 5 move up and down in the hoistway 6. The braking device 10 of this embodiment is fixed to the upper portion of the car 4 with bolts (not shown).

  In this embodiment, the braking device 10 is provided on the car 4, but it may be provided on the counterweight 5, or may be provided on both the car 4 and the counterweight 5. Even if it is provided on the counterweight 5, since the raising and lowering of the car 4 is stopped via the rope 3 by the operation of the braking device 10, the same effect as that provided in the car 4 can be obtained. Is possible. Further, if both the car 4 and the counterweight 5 are provided, safety can be further improved. In this embodiment, a rope type elevator apparatus is described as an example, but the present invention can also be applied to a self-propelled elevator apparatus or the like provided with a driving device in a car.

  As shown in FIGS. 2 and 3, the braking device 10 according to the present embodiment is disposed in pairs so as to face each other, and includes a braking arm 12 that is rotatably provided with a shaft 11 as a fulcrum. The brake springs 13 installed between the brake arms 12 and the brake springs 13 are arranged in pairs so as to be opposed to each other inside the brake arms 12 and are rotatably provided with the shaft 11 as a fulcrum. The arm 14, the actuating spring 15 and the actuator 16 installed between the actuating arms 14, and the end opposite to the one provided with the braking spring 13 across the shaft 11 of the braking arm 12 And an actuating spring 15 and an actuating braking unit 17 disposed at the end opposite to the side where the actuator is provided, with the shaft 11 of the actuating arm 14 interposed therebetween.

  The actuating spring 15 gives the actuating arm 14 a force to bring the brake element 17a, which is the actuating braking portion 17, into contact with the car-side guide rail 7, which is a pressed member. The actuator 16 applies a force in the direction of pulling the brake 17 a away from the car-side guide rail 7 against the spring force of the operating spring 15 to the operating arm 14.

  When the power supply to the actuator 16 is cut off, the brake element 17a of the operating braking portion 17 is pressed against the car-side guide rail 7 as shown in FIG. A slope is provided on the brake arm 17a installation side of the operating arm. Also, a slope is provided on the side of the braking arm 12 opposite to the pressed member, and this slope faces the braking arm 12 and the operating arm 14 when the operating arm 14 presses the brake 17a against the car-side guide rail 7. The slope of the arm 14 is configured to be substantially continuous and has a gap with the pressed member.

  When the car 17 is pressed against the car-side guide rail 7, the brake 17 a moves upward along the slope of the operating arm 14 due to frictional force, and moves downward when the car 4 moves upward. Along with this, the brake element 17 a enters between the braking arms 12 and tries to spread the braking arms 12. However, a force is applied to the braking arm 12 to press the braking element 17a, which is the operating braking portion, against the car-side guide rail 7, which is the pressed member, by the braking spring 13 installed between the braking arms 12. Therefore, the brake 17 can be pressed against the car-side guide rail 7 by the braking arm 12 and the car 4 can be braked. In other words, in this embodiment, the brake element 17a functions as a brake part of the brake member while being a brake part for operation.

  As described above, the braking device 10 according to the present embodiment is configured to be able to apply braking in both the upward and downward directions of the lifting body. In this embodiment, a braking member that brakes the lifting body in accordance with the contact of the brake 17a, which is an operating braking portion, with the pressed member is constituted by the braking arm 12 and the braking spring 13.

  Next, the structure of the operating arm 14 will be described in more detail. As shown in FIGS. 4 and 5, the actuator 16 includes a limit stopper 18 that limits the stroke so as not to exceed a certain value, a switch 19 attached to a coil 16 a that is an electromagnet portion of the actuator 16, and a plunger of the actuator 16. The switch pushing portion 20 attached to 16b, the link shaft 16c attached to the coil 16a which is an electromagnet portion, the link shaft 16d attached to the plunger 16b, and the operation of the actuator 16 attached to the ends of the link shafts 16c and 16d. An operating arm locking portion 21 for linking opening and closing of the operating arm 14 is provided. The disabling stopper 22 can be inserted between the operating arm locking portion 21 and the operating arm 14. The switch 19 may be attached to the plunger 16b, and the switch pusher 20 may be attached to the coil 16a.

  In the present embodiment, when the actuator 16 is energized, the coil 16a, which is an electromagnet portion, and the plunger 16b are in contact with each other, and the switch push portion 20 pushes the switch 19 at that time. That is, it can be detected that the brake device 10 is released by pressing the switch 19. When the actuator 16 is de-energized, the operating arm 14 is expanded by the force of the operating spring 15, but the plunger 16b can be prevented from dropping from the coil 16a due to the interference of the plunger 16b with the limiting stopper 18. When the actuator 16 is energized again, the plunger 16b is attracted to the coil 16a, and the brake 17a can be pulled away from the car-side guide rail 7 as shown in FIG. And in this embodiment, the signal which the switch 19 act | operated is sent to the control part of an elevator apparatus, and the normal operation of an elevator apparatus is not implemented unless it is the time when the operation signal of the switch 19 is detected.

  In the present embodiment, the switch 19 and the switch pushing portion 20 are configured to be pushed when the plunger 16b is attracted to the coil 16a. However, the distance between the coil 16a and the plunger 16b is widened in a state where the energization to the actuator 16 is cut off. What is necessary is just to set it as the structure which pushes a switch in the state narrower than a space | interval and smaller than the predetermined space | interval which is the distance which the brake 17a is pulled away from a to-be-pressed member when the actuator 16 is supplied with electricity. Further, the stroke of the plunger 16b provided with the limiting stopper 18 may be a distance at which the operating arm 14 opens and the brake 17a contacts the car-side guide rail 7 which is a pressed member.

  In this embodiment, for example, when the braking device 10 is invalidated when the power supply to the actuator 16 cannot be ensured, such as during maintenance, the actuator 16 strokes as shown in FIG. Since the limit stopper 18 does not make a stroke beyond a predetermined value, the actuator cannot be rotated in the direction in which the brake 17a is pressed against the car-side guide rail 7, and therefore the operating arm 14 and the operating arm at the ends of the link shafts 16c and 16d When the disabling stopper 22 is inserted between the locking portions 21, the operating arm 14 rotates in a direction to separate the brake 17 a at the end of the operating arm 14 from the car-side guide rail 7. And the braking device 10 will be in a disabled state. By doing so, it is possible to invalidate the braking device 10 and operate the car 4 even when the power supply to the actuator 16 cannot be secured.

  FIG. 8 is a view for explaining the configuration of the invalidation stopper 22. FIG. 8A is a front view of the sandwiching portion 22 a that is the plate portion of the invalidation stopper 22, and FIG. FIG. 6 is a side view of the disabling stopper 22 and shows a state where the adjusting screw 22b is inserted into the adjusting screw insertion hole 22d of the sandwiching portion 22a of the disabling stopper 22. As shown in FIG. 8, the disabling stopper 22 is composed of a sandwiching portion 22a and an adjusting screw 22b. The sandwiching portion 22a has a U-shaped cutout portion 22c on the upper side of the long side of the external rectangular shape. Further, an adjustment screw insertion hole 22d is provided in the lower portion of the long side portion. Then, between the actuating arm 14 and the actuating arm locking portion 21 provided at the end of the link shafts 16c and 16d, the clamping portion 22a of the disabling stopper 22 is provided, and the notch 22c of the clamping portion 22a is provided with the link shaft 16c. , 16d, and then by adjusting the rotation angle of the operating arm 14 with the adjusting screw 22b screwed into the adjusting screw insertion hole 22d, the thickness of the sandwiching portion 22a is increased as shown in FIG. An effect of separating the brake element 17a from the car-side guide rail 7 can be obtained. Further, since the rotation angles of the left and right operating arms 14 can be adjusted, the brake 17a can be reliably separated from the car-side guide rail 7.

  Furthermore, in this embodiment, in order to brake the raising and lowering of the lifting body, first, the brake element 17a that is the operating braking portion is brought into contact with the pressed member, and this is moved by the frictional force, thereby operating the braking member and applying the braking force. Since the mechanism is generated, the contact force for expanding the operating arm 14 to contact the brake 17a can be reduced. That is, since the spring force of the actuation spring 15 can be reduced, the actuator 16 that can resist the spring force can be reduced accordingly. And since it is the structure which gives a big braking force, if it is a normal braking device because the spring force of the action | operation spring 15 is small, it is very difficult to attach such a disabling stopper 22. Further, since the force for attaching the disabling stopper 22 to the braking device 10 and pulling the brake 17a away from the pressed member can be reduced, the disabling stopper 22 can be easily attached.

  Further, in this embodiment, as shown in FIGS. 4 and 7, the opening angle of the operating arm 14 on the side where the brake 17a is attached is adjusted so that it can be opened only to a state where they are substantially parallel to each other. Yes. For this reason, the actuator 16 can attract the coil 16a and the plunger 16b even if the actuator 16 is energized even if the disabling stopper 22 is forgotten to be removed and the maintenance work is finished. First, the actuator 16 is in an open state. Then, since the switch 19 of the coil 16a is separated from the switch pushing portion 20 of the plunger 16b, the switch 19 is not activated. Since the elevator is incapable of normal operation when the switch 19 is not activated, the elevator will not be in a normal operation state by forgetting to remove the disabling stopper 22.

  Thus, when the switch 19 is not provided, the maintenance work is completed and the disabling stopper 22 is forgotten to be removed with the disabling stopper 22 leaving the brake element 17a at the tip of the operating arm 14 separated. Even when the invalidation stopper 22 is attached, the elevator apparatus may be normally operated. In that case, because the elevator operates normally without forgetting to remove the invalidation stopper 22, even if the actuator is de-energized when the descending speed exceeds the specified value, the invalidation stopper 22 causes the operating arm 14 to It is assumed that there is a possibility that the elevator cannot be braked because it cannot operate.

  On the other hand, according to the present embodiment, since the elevator cannot be normally operated in a state where the braking device is mechanically invalidated, it is possible to prevent traveling in a state where braking is not possible. Therefore, the reliability and safety as an elevator can be improved. Further, forgetting to remove the invalidation stopper 22 can be prevented.

  In this embodiment, the switch 19 does not operate when the disabling stopper 22 is attached to the braking device 10 by adjusting the opening angle of the operating arm 14. Is attached to the braking device 10 to interfere with the operation of the switch 19 by interfering between the switch 19 and the switch pushing portion 20, or to prevent the operation of the switch 19 by interfering between the coil 16a and the plunger 16b. It is possible to take a configuration that prevents the operation of various switches 19.

  Furthermore, in the present embodiment, the example in which the car-side guide rail 7 is used as the member to be pressed has been described, but the rope 3, the counterweight-side guide rail 8 or the like can also be used.

DESCRIPTION OF SYMBOLS 1 Machine room 2 Sheave 3 Rope 4 Car 5 Balance weight 6 Hoistway 7 Car side guide rail 8 Balance weight side guide rail 9 Baffle 10 Braking device 11 Shaft 12 Braking arm 13 Braking spring 14 Actuating arm 15 Actuation Spring 16 Actuator 16a Coil 16b Plunger 16c, 16d Link shaft 17 Actuating braking portion 17a Braking element 18 Limiting stopper 19 Switch 20 Switch pushing portion 21 Actuating arm locking portion 22 Invalidating stopper 22a Holding portion 22b Adjusting screw 22c Notch Part 22d Adjustment screw insertion hole

Claims (7)

Actuating arms arranged in pairs so as to face each other and rotatably provided with a shaft as a fulcrum, an actuating braking unit arranged at an end of the actuating arm, and the actuating braking unit A spring for applying a force to contact the pressed member to the actuating arm, and a force for pulling the actuating brake portion away from the pressed member against the spring force of the spring. And an elevator braking device provided in the lifting body, comprising: an actuator that performs braking, and a braking member that brakes the lifting body in accordance with the contact of the braking portion for operation with the pressed member.
A state in which the link shaft attached to the actuator, the operation arm locking portion that links the operation of the actuator and the rotation of the operation arm attached to the link shaft are provided, and the power supply to the actuator is interrupted Thus, a disabling stopper that prevents the actuating brake part from contacting the pressed member against the spring force of the spring can be attached between the actuating arm and the actuating arm locking part. An elevator braking device characterized by that.   When the actuator is energized, it is equipped with a detection device that detects that the plunger and electromagnet part of the actuator are attracted and the distance between them is smaller than a predetermined interval, and normal operation can be performed when this detection device detects The elevator braking device according to claim 1, wherein: The braking member, as well as being arranged in pairs so as to face each other, rotatably provided a shaft as a fulcrum, the pressed the said actuating brake that moves upon contact with the pressing member A braking arm that applies a pressing force to the member, and a braking that is installed between the braking arms and that applies a force that the braking arm presses the operating braking portion against the pressed member. 2. The elevator according to claim 1, further comprising: a spring, wherein the operating braking portion moves between the braking arms by contact with the pressed member to brake the lifting body. Braking device.   The elevator braking device according to claim 1, wherein the actuator includes a restriction stopper that prevents an operation stroke from exceeding a predetermined value.   The detection device comprises a switch provided on one of the plunger or electromagnet part of the actuator, and a switch operating part for operating the switch provided on the other side of the plunger or electromagnet part provided with the switch. The elevator braking device according to claim 2.   6. The elevator according to claim 2, wherein in the state where the invalidation stopper is attached, even if the actuator is energized, the operation of the actuator is inhibited and the operation of the detection device is prevented. Braking device. In an elevator apparatus comprising a lifting body that moves up and down in a hoistway, a drive device that lifts and lowers the lifting body, and a braking device provided in the lifting body,
The braking devices are arranged in pairs so as to face each other, and an operating arm that is rotatably provided with a shaft as a fulcrum, and an operating braking unit that is arranged at an end of the operating arm, A spring for applying a force to the actuating arm to bring the actuating brake part into contact with the pressed member; and a force in a direction for pulling the actuating brake part away from the pressed member against the spring force of the spring. An actuator to be applied to the operating arm, a link shaft attached to the actuator, an operating arm locking portion attached to the link shaft and linking the operation of the actuator and the rotation of the operating arm, and the operating And a braking member that brakes the lifting body in accordance with the contact of the braking portion with the pressed member, and the spring force of the spring in a state where the energization to the actuator is interrupted An elevator device, wherein a disabling stopper that prevents the actuating brake part from coming into contact with the pressed member can be attached between the actuating arm and the actuating arm locking part. .

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