Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
  • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces

Definitions

• the present invention relates to an elevator safety device that forcibly stops a car when an elevator car ascending / descending speed exceeds a predetermined value.
• An elevator apparatus is provided with an emergency stop device that forcibly stops the car forcibly when the lifting speed of the force exceeds a predetermined value as a safety device.
• Fig. 4 shows the schematic mechanism of an elevator apparatus equipped with a conventional emergency stop device.
• the elevator car 13 and the counterweight 14 are suspended in the form of a fishing bottle by a main rope 16 wound around the drive sheave 15 of the lifting machine.
• the hoistway moves up and down in opposite directions in conjunction with the movement.
• the lifting force 13 and the counterweight 14 are guided in the ascending / descending direction by respective guide rails 1 (partially not shown) standing in the hoistway.
• the main wheel 17 of the governor installed at the top of the hoistway and the tension wheel 18 installed in the hoistway pit are used for an endless governor, a part of which is connected to the car 13.
• the main wheel 17 of the governor is linked to the movement of the governor rope 19 by moving the governor rope 19 in conjunction with the raising and lowering of the car 13. Rotate. That is, the governor detects the ascending / descending speed of the car 13 based on the rotation speed of the main wheel 17.
• the speed governor causes the speed of the car 13 to be abnormal. Detected, force 13 is forcibly stopped. Specifically, first, an abnormality in the speed of the car 13 is detected when the number of rotations of the main wheel 17 of the governor exceeds a predetermined value. When a speed abnormality of the force 13 is detected, the gripping means (not shown) provided in the speed governor grips the speed governor rope 19 and forcibly moves the speed governor rope 19. To stop.
• the emergency stop device 2 provided on the force 13 is operated via a safety link 20 connected to the speed governor rope 19 when the speed governor rope 19 is stopped. Force you to stop.
• the safety device 2 is arranged so as to correspond to each guide rail 1. As the brake bites into the guide rail 1, the brake force is generated by inserting a wedge.
• the conventional safety device with a powerful structure is compatible with a guide rail that guides the lifting body by the lifting lever of the safety link fixed to the lifting body consisting of a cage or counterweight and the governor rope
• a device that directly pushes up the lower surfaces of the wedges of a pair of emergency stop devices provided to operate the emergency stop device is disclosed (for example, see Patent Document 1).
• Patent Document 1 Japanese Unexamined Patent Publication No. 2001-80840
• the present invention has been made in order to solve the problem of increasing power, and an object of the present invention is to reduce the time required for the car to stop after an abnormality in the speed of the car is detected. Is to provide a safety device. Means for solving the problem
• the elevator safety device includes a guide rail that is erected in the hoistway, guides the force, and detects an abnormal speed of the force.
• the guide rail In the safety device of the elevator that stops the force when the speed error of the car is detected by the force speed detection means, the guide rail is provided on the force and moves downward.
• One side force of the guide surface and the guide surface And a brake provided between one side surface of the guide rail and a suction portion provided on the brake and for adsorbing to the guide rail when an abnormal speed of the car is detected by the force speed detecting means.
• the brake element is prevented from descending when the attracting portion is attracted to the guide rail, and is also guided by the descending guide surface to generate a braking force between the guide rail and one side surface.
• the present invention includes a guide rail that is erected in the hoistway for each force that moves up and down in the elevator hoistway and guides the force, and a force speed detecting means that detects an abnormal speed of the force.
• the elevator safety device that stops the force car is installed on the car and moves away from one side of the guide rail as it turns downward.
• a brake provided between the guide surface and one side surface of the guide rail, and a brake speed detector provided on the brake and detecting an abnormal speed of the car.
• the brake element is restrained from descending when the suction part is attracted to the guide rail, and is guided to the inner surface of the guide rail between the one side surface of the guide rail and the brake element.
• Braking force In was configured to produce, it is possible to shorten the time required from when the detected force your speed abnormality until the car stops.
• FIG. 1 is a front view of an elevator safety device according to Embodiment 1 of the present invention.
• FIG. 2 is a side view of an essential part of an elevator safety device according to Embodiment 1 of the present invention.
• FIG. 3 is a diagram for explaining the operation of the elevator safety apparatus according to Embodiment 1 of the present invention.
• FIG. 4 is a configuration diagram of a conventional elevator apparatus.
• FIG. 1 is a front view of an elevator safety device according to Embodiment 1 of the present invention.
• a car (not shown) that moves up and down in an elevator hoistway is engaged by guide rollers (not shown) and the like provided at both upper and lower ends thereof.
• the up and down direction is guided.
• the guide rail 1 has a substantially T-shaped cross section and is erected in the ascending / descending path so that the heads lb projecting from the flange la are opposed to each other with the cage in between. .
• the lower part of the force cage is arranged to correspond to each guide rail 1, and when the descending speed of the force exceeds a specified value, the cage is engaged by engaging with each guide rail 1.
• An emergency stop device 2 for emergency stop is provided.
• the force cage or hoistway fixed body includes force force speed detecting means for detecting whether or not the force at which the descending speed of the car exceeds a specified value, and the force force speed detecting means.
• power control means for performing power control on an electromagnet (to be described later) of the emergency stop device 2 when it is detected that the lowering speed of the car exceeds a predetermined value.
• the emergency stop device 2 includes a base 3 provided on the car and arranged to correspond to each guide rail 1, and a head lb—side surface of the guide rail 1 provided on the base 3.
• the first brake element 4 having a braking surface 4a that is opposed to each other with a slight gap and the base 3, and the head side of the guide rail 1 lb away from the other side force as it is directed downward.
• a second brake 6 having a braking surface 6a opposite to the other side of the head lb of the guide rail 1 and a lower portion of the second brake 6 and the cage speed detecting means
• part of the guide rail 1 head lb other side is controlled by the power control means.
• an adsorbing part 7 for adsorbing and fixing.
• the guide portion 5 is provided on the base 3, and has a guide 8 having a substantially triangular prism shape having the guide surface 5a, and a substantially obliquely provided on both sides of the guide surface 5a of the guide 8. It is composed of an L-shaped guide plate 9 and a cover. Note that the guide plate 9 is designed so that the guide rail 1 of the guide 8 is directed downward according to the downward force so as to be substantially parallel to the folded portion force guide surface 5a arranged to face the head lb side of the proposed inner surface 5a of the guide 8. The head lb and other side forces are formed so as to be separated.
• the second brake element 6 and the guide plate 9 are provided with a sliding mechanism that allows the second brake element 6 to slide in the vertical direction along the folded portion of the guide plate 9. It has been.
• the sliding mechanism may have any configuration.
• a projecting portion having a substantially T-shaped cross section may be formed on the opposite head lb side of the second brake element 6 so that the projecting portion engages with the folded portion of the guide rail 9. ,.
• the second brake element 6 provided on the guide plate 9 so as to be slidable in the vertical direction is disposed below the guide plate 9 by its own weight when no external force is applied. At this time, a predetermined gap is formed between the braking surface 6a of the second braking element 6 facing each other and the head lb other side of the guide rail 1, and the braking surface 6a is located on the other side of the head lb. There is no contact.
• the second brake element 6 moves to the upper side of the guide plate 9, the second brake element 6 is guided by the sliding mechanism provided between the guide plate 9 and the head. Move gradually to the lb side.
• the braking surface 6a of the second brake element 6 and the other side surface of the head lb come close to each other, and the gap formed therebetween gradually becomes narrower.
• the side surface opposite to the head lb of the second brake element 6 and the guide surface 5a of the guide 8 are in a sliding mechanism such as a roller guide (see FIG. (Not shown).
• the second brake element 6 further moves upward and reaches a predetermined height, the distance between the brake surface 4a of the first brake element 4 and the brake surface 6a of the second brake element 6 is determined as a guide.
• the width is approximately the same as the width of the head lb of the rail 1, and the braking surface 4a contacts one side of the head lb and the braking surface 6a contacts the other side of the head lb.
• the second brake 6 is set so that the height force of the braking surface 6a when contacting the head lb of the guide rail 1 is substantially the same as the braking surface 4a of the first braking device 4.
• FIG. 2 is a side view of the main part of the elevator safety device according to Embodiment 1 of the present invention, showing the configuration of the second brake 6 and the suction part 7 provided below the second brake 6. . 1 and 2, the suction portion 7 provided below the braking surface 6a of the second brake piece 6 has a substantially cylindrical shape with the guide portion 10 fixed to the lower portion of the second brake piece 6.
• the suction surface 1 la provided at one end of the guide rail 1 is arranged so as to face the other side of the head lb of the guide rail 1, and this suction surface 11a can be contacted and separated from the other side of the head lb.
• the electromagnet 11 is provided on the guide portion 10 so as to be slidable in the horizontal direction, and the panel 12 urges the electromagnet 11 to the other side of the head lb.
• the sliding mechanism provided in the guide portion 10 and the electromagnet 11 may have any configuration.
• a groove having a substantially T-shaped cross section is formed in the horizontal direction at the lower part of the guide part 10, and a protrusion having a substantially T-shaped cross section that fits into the groove is formed at the upper part of the electromagnet 11. It may be the one with a part.
• the panel 12 is provided between the outer peripheral surface of the electromagnet 11 and a stopper 10 a provided on the guide portion 10.
• the stopper 10a is disposed on the side opposite to the head lb of the sliding mechanism so as to face the other end surface of the electromagnet 11, and locks the electromagnet 11 biased by the panel 12. Therefore, when the second brake element 6 is disposed below the guide blade 9, a predetermined gap is formed between the attracting surface 11a of the electromagnet 11 and the other side surface of the head lb. Yes.
• FIG. 3 is a view for explaining the operation of the elevator safety apparatus according to Embodiment 1 of the present invention.
• the lifting speed of the car is always detected by the force speed detecting means.
• the second brake 6 is disposed under the guide plate 9 due to its own weight, and the attracting surface 11a of the electromagnet 11 and the head lb other side of the guide rail 1 A predetermined gap is formed between them.
• the force speed detecting means detects that the lowering speed of the car exceeds a predetermined value
• the power control means applies to the magnet 11 based on the detection result of the force speed detecting means.
• Electric power is supplied to generate a magnetic force on the attracting surface 11a of the electromagnet 11.
• the urging force of the panel 12 provided between the stop 10a and the electromagnet 11 is set to be smaller than the attractive force generated between the electromagnet 11 and the guide rail 1 in the state of FIG. Yes. Therefore, the electromagnet 11 moves horizontally to the head lb side of the guide rail 1 against the urging force of the spring 12 when power is supplied by the power control means, and the head 11 of the guide rail 1 has the head lb. Adsorbed and fixed at the position. The lowering of the second brake element 6 that has been lowered with the force is stopped by the electromagnet 11 being attracted to the head lb of the guide rail 1.
• the elevator car continues to descend after the electromagnet 11 is attracted and fixed to the head lb of the guide rail 1. Accordingly, the second brake element 6 is guided by the guide surface 5a of the descending guide 8 so as to be pressed against the head lb side, and the second brake surface 6a and the head lb When the other side comes into contact, a wedge is inserted between the guide 8 and the head lb of the guide rail 1, and a strong braking force that forcibly stops the force is generated.
• the supply of electric power to the electromagnet 11 and the electromagnet to the guide rail 1 are performed before the abnormal speed of the force is detected and the braking force for stopping the car is exerted. Because only 11 suction operations are required, the time until the car actually stops is greatly reduced compared to the case of using a governor rope or safety link as in the past. Is possible. In addition, since a safety link is not required and the structure can be simplified, the cost can be reduced and the connection between the safety device 2 and the safety link need not be considered. The restrictions on the installation location of the emergency stop device 2 are relaxed, and workability during installation and maintenance is improved.
• the electromagnet 11 when an abnormal speed of the car is detected by the force speed detecting means, the electromagnet 11 is supplied to the electromagnet 11 by supplying power to the head of the guide rail 1.
• the electromagnet 11 arranged so as to cancel the magnetic force of the permanent magnet, when the speed error of the car is detected by the force speed detecting means, the electric power to the electromagnet 11 is cut off to stop the permanent magnet. May be fixed to the head lb other side of the guide rail 1 by suction.
• the electromagnet 11 and the permanent magnet are arranged so as to cancel each other's magnetic force. It is configured so that the permanent magnet is attracted to the head lb of the guide rail 1.
• the permanent magnet is used as the attracting portion 7, and the speed of the car is detected by the force speed detecting means.
• the permanent magnet may be attracted and fixed to the guide rail 1 by an elastic body or the like.
• a roller or the like that contacts the guide rail 1 may be used as a force / velocity detecting means, and the braking force may be generated only by a mechanical operation without using an electrical operation. ,.
• the elevator safety device that is effective in the present invention, it is possible to significantly reduce the time required to detect an abnormal speed of the car and to actually stop the car in an emergency. It is possible to greatly reduce the distance traveled by the force later, and it is possible to provide an elevator apparatus with higher safety.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Maintenance And Inspection Apparatuses For Elevators (AREA)

Priority Applications (4)

Applications Claiming Priority (1)

Publications (1)

Family

ID=36406876

Family Applications (1)

Country Status (4)

Cited By (4)

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Citations (4)

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• 2004
  • 2004-11-16 EP EP04822652.6A patent/EP1813566B1/de not_active Ceased
  • 2004-11-16 CN CN2004800350847A patent/CN1886320B/zh not_active Expired - Fee Related
  • 2004-11-16 WO PCT/JP2004/016976 patent/WO2006054328A1/ja active Application Filing
  • 2004-11-16 JP JP2006518998A patent/JP4672656B2/ja not_active Expired - Fee Related

Patent Citations (4)

Non-Patent Citations (1)

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