JP2008239273A - At-earthquake confinement preventive device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an at-earthquake confinement preventive device for elevator to work in the event of a large earthquake, capable of preventing its safety circuit from being broken until elevator car stops at the nearest floor. <P>SOLUTION: The at-earthquake confinement preventive device for elevator is equipped with a car door switch 2, a plurality of hall gate door switches 3a-3c, a limit switch 5 for limiting an upper overshoot installed in the shaft upper part, a limit switch 6 for limiting a lower overshoot installed in the shaft lower part, a final limit switch 8 for the end point at the top installed at the top of the shaft, a final limit switch 9 for the end point at the bottom installed at the bottom of the shaft, and a short circuiting circuit which senses the car in running, and in the event of a large earthquake, short circuits for a certain time either of the hall gate door switches, the limit switch for upper overshoot, and the final limit switch for the end point at the top so that the safety circuit is not broken. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator confinement prevention device for an earthquake.

  When a large earthquake occurs, it is necessary to stop the elevator car in operation at the nearest floor and promptly get off passengers in the car. However, even if it is desired to stop at the nearest floor, the safety switch may malfunction and the car may stop between the floors, resulting in confinement.

  In addition, as a conventional technology, even if a safety device operates during evacuation operation and the car stops between the floors, the traveling condition confirmation contact group is partially short-circuited by human operation to make the car safe. In an emergency operation device for an elevator that can be operated up to the floor, when the seismic detector is operating, there has been proposed one that partially short-circuits the travel condition confirmation contact group when manually operated (Patent Document 1). reference). In addition, when the elevator safety device or protection device detects an abnormality and the car is in an emergency stop state, the door will be closed when the elevator stops in an emergency to reduce the number of passengers trapped in the car. Proposed an elevator control system in which the elevator door is opened by the door opening means when the safety device has not detected an abnormality in the elevator door system and the car is stopped in the emergency door opening / closing area (For example, refer to Patent Document 2).

Japanese Patent Laid-Open No. 10-17233 JP 7-33368 A

  Conventionally, when a large earthquake occurs, a number of landing gate door switches, limit switches for over-running restrictions, final limit switches for end points, etc. are easily shaken due to seismic motion (dancing It was easy to malfunction. When a major earthquake occurs, a landing gate door switch installed on the upper floor that is particularly susceptible to earthquake motion, an upper limit limit switch that is attached to the upper part of the hoistway to prevent ascent, and the upper end of the hoistway The final limit switch for the end of the upper end that is attached to and suddenly stops, etc. is affected by the earthquake motion, dances, jumps or opens, or the engagement vane collides, and the safety circuit is cut. There is a risk that the elevator will stop suddenly and a confinement accident will occur.

  In addition, in the emergency operation device of the elevator of the prior art, when the seismic detector is operating, the driving condition confirmation contact group is partially short-circuited if it is manually operated. Even so, it is short-circuited, so there remains anxiety in terms of safety. In addition, in the elevator control device of the prior art, the door is opened if there is no abnormality in the door system in order to reduce confinement accidents, and both conventional technologies are installed on the upper floor that is susceptible to earthquake motion. Pay attention to the landing gate door switch that is attached, the upper limit switch for limiting the overpass that prevents the climb by being attached to the upper part of the hoistway, and the final limit switch for the upper end part that is attached to the upper end of the hoistway and stops suddenly. It was n’t.

  The present invention has been made to solve the above-described problems. If a car is running when a large earthquake occurs, a landing gate door switch on the upper floor that is easily affected by seismic motion, upper upper limit Even if the limit switch for the upper end and the final limit switch for the end of the upper end are opened by dancing or jumping under the influence of earthquake motion, the safety circuit will not be cut until it stops at the nearest floor The present invention provides an elevator confinement prevention device for an elevator that is short-circuited for a certain period of time.

  The apparatus for preventing confinement of an elevator according to the present invention during an earthquake is provided in a car, opened when the door is opened and closed when the door is closed, and provided at each floor landing, opened when the door is opened, and closed when the door is closed. A plurality of landing gate door switches formed, a limit switch for limiting upper overpass provided in the upper part of the hoistway, a limit switch for restricting lower overpass provided in the lower part of the hoistway, and for restricting upper overpass Final limit switch for the upper end end point provided at the upper end of the hoistway above the limit switch, and the final limit for the lower end end point provided at the lower end of the hoistway below the limit switch for lower crossover limit Switches and multiple landing gate door switches and limit switches for overpass restrictions when a car is detected and a major earthquake is detected And short fixed time any of the final limit switch for the upper end portion ending, in which a short circuit that prevents expired safety circuit.

  Elevator seismic confinement prevention devices are installed in the car, open when the door is opened and closed when the door is closed, and are installed at each floor landing, open when the door is opened and closed when the door is closed. Multiple landing gate door switches, limit switch for upper overpass restriction provided at the upper part of the hoistway, limit switch for lower overpass restriction provided at the lower part of the hoistway, and limit for upper overpass restriction A final limit switch for the upper end end point provided at the upper end of the hoistway above the switch, and a final limit switch for the lower end end point provided at the lower end of the hoistway below the limit switch for lower overpass restriction When a car is running and a large earthquake is detected, multiple landing gate door switches, limit switches for upper overpass restrictions, and upper And all final limit switch for parts endpoint short predetermined time, in which a short circuit that prevents expired safety circuit.

  In addition, the short circuit is activated when the car is running, and is activated when the car arrives at the nearest floor and the door zone switch is opened, and when the earthquake detector detects a major earthquake. It is composed of a large earthquake detection relay that is energized and a fixed time operation relay that is energized for a certain period of time until the nearest floor.

  According to the present invention, if a car is running at the time of a major earthquake, the upper floor landing gate door switch, upper limit limit switch, and upper limit end limit that are easily affected by earthquake motion. Even if a switch or the like is opened due to the influence of earthquake motion, it is short-circuited for a certain period of time until it stops at the nearest floor until it stops at the nearest floor. The landing gate door switch on the upper floor, which is prone to malfunction due to seismic motion, the limit switch for restricting the upper line, and the final limit switch for the end of the upper end are not affected at all by the malfunction, and confinement accidents due to it are not caused. There is an effect that can be prevented.

Embodiment 1 FIG.
FIG. 1 is an electric circuit diagram showing an elevator earthquake confinement prevention apparatus according to Embodiment 1 of the present invention, and FIG. 2 is an electric circuit showing another part of an elevator earthquake confinement prevention apparatus according to Embodiment 1 of the present invention. FIG.

  In FIG. 1, 1 is an elevator control device comprising a CPU and the like, and 2 is a car door switch, which is closed when the door is closed. Reference numerals 3a to 3c denote a plurality of landing gate door switches provided in each floor landing, which are connected in series and are closed when the door is closed. As is well known, the structure of these landing gate door switches 3a to 3c includes a lock latch, a latch, and a door switch contact, and the engagement between the lock latch and the latch is easily released when subjected to a large impact. There are reports that the floor is more likely to come off by dancing or jumping under the influence of earthquake motion during an earthquake. 4 is an emergency stop switch provided under the car, which is normally closed. Reference numeral 5 denotes a limit switch for restricting the overrun of the upper line which is attached to the upper part of the hoistway above the uppermost floor and prevents the ascending passage, and is normally closed. Reference numeral 6 denotes a limit switch for restricting a lower overpass that is attached to the lower part of the hoistway below the lowermost floor and prevents the descent, and is normally closed. A governor switch 7 is normally closed. Reference numeral 8 denotes a final limit switch for the end of the upper end that is attached to the upper end of the hoistway above the limit switch 5 for restricting the overrun limit and is suddenly stopped, and is normally closed. Reference numeral 9 denotes a final limit switch for a lower end portion which is attached to the lower end of the hoistway below the limit switch 6 for restricting overrunning and is suddenly stopped, and is normally closed. As is well known, the structure of these limit switches 5 and 6 and final limit switches 8 and 9 is a structure in which a roller pushed by a cam is always pressed against the cam side by a spring force during operation, particularly in an elevator. There is a report that the limit switch 5 for upper line over limit and the final limit switch 8 for the upper end end point sway under the influence of the earthquake motion at the time of an earthquake and are likely to malfunction. In the figure, 10 is a car operation switch provided in the car, 11 is a car operation switch provided on the car, and 12 is a pit switch provided in the hoistway pit.

  In FIG. 2, reference numeral 13 denotes a traveling detection relay (A) which is energized when the traveling contact 14 is closed to close the self-holding contact 13a. This traveling detection relay (A) 13 is de-energized when the car arrives at the nearest floor and the door zone switch 15 is opened. Reference numeral 16 denotes a large earthquake detection relay (B) which is energized when the contact 17 of the earthquake detector for detecting an earthquake of 150 GAL or more is closed. Reference numeral 18 denotes a fixed time operation relay (C) that is energized for a fixed time until the car arrives at the nearest floor.

  As shown in FIG. 1, the elevator confinement prevention device for an elevator according to the present invention shorts the series circuit of the landing gate door switches 3 a to 3 c that are likely to come off due to dancing or jumping under the influence of the earthquake motion during the earthquake. Thus, the contact point of the traveling detection relay (A), the contact point of the large earthquake detection relay (B), and the contact point of the operation relay (C) for a certain period of time are connected in series, and all these contacts are closed. When the safety circuit does not break. Further, the circuit of the upper limit limit limit switch 5 and the upper limit end limit limit switch circuit 8 are short-circuited due to the influence of the earthquake motion at the time of the earthquake, and are likely to malfunction. The contact of the traveling detection relay (A), the contact of the large earthquake detection relay (B), and the contact of the operation relay (C) for a certain period of time are connected in series. The circuit is not cut. As a result, even if the landing gate door switch on the upper floor, which is likely to malfunction due to the earthquake motion of a large earthquake, the limit switch for restricting the upper line, and the final limit switch for the upper end point are malfunctioned, a confinement accident caused by the malfunction occurs. It can be lost.

  Therefore, according to the present invention, if a car is running when a large earthquake occurs, the safety circuit is not broken for a certain period of time (the time until it arrives at the nearest floor). The gate gate switch on the upper floor, which is prone to malfunction due to earthquake motion, the limit switch for restricting the upper line, and the final limit switch for the end of the upper end are not affected at all by the malfunction, thereby preventing confinement accidents from occurring. can do.

Embodiment 2. FIG.
In the first embodiment, when the car is running and a large earthquake is detected, all of the landing gate door switches, the upper limit limit switch, and the final limit switch for the upper end are all Is short-circuited for a certain period of time so that the safety circuit is not broken, but any one of a plurality of landing gate door switches, a limit switch for limiting the upper line limit, and a final limit switch for the end of the upper end for a certain period of time. Of course, the safety circuit may not be cut by short-circuiting.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an electric circuit diagram showing an elevator confinement prevention device for an elevator according to Embodiment 1 of the present invention. It is an electrical circuit diagram which shows the other part of the earthquake confinement prevention apparatus of the elevator in Embodiment 1 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Elevator control apparatus 2 Car door switch 3a-3c Landing gate door switch 4 Emergency stop switch 5 Limit switch for upper line limit 6 Limit switch for lower line limit 7 Governor switch 8 Final limit for upper end point Switch 9 Final limit switch for bottom end point 10 In-car operation switch 11 On-car operation switch 12 Pit switch 13 Traveling detection relay (A)
13a Self-holding contact 14 Travel detection contact 15 Door zone switch 16 Large earthquake detection relay (B)
17 Seismic detector contact 18 Relay for a certain period of time (C)

Claims (3)

A car door switch provided in the car, opened when the door is opened and closed when the door is closed;
A plurality of landing gate door switches that are provided at each floor landing and are opened when the door is opened and closed when the door is closed;
A limit switch for limiting the overrun on the upper part of the hoistway,
Limit switch for lower overpass restriction provided at the lower part of the hoistway,
A final limit switch for the end of the upper end provided at the upper end of the hoistway above the limit switch for limiting the upper overpass;
A final limit switch for the lower end of the lower end provided at the lower end of the hoistway below the limit switch for lower overpass limitation;
When a car is detected and a major earthquake is detected, one of the plurality of landing gate door switches, upper limit limit switch for upper line limit, and final limit switch for upper end point is short-circuited for a certain period of time. A short circuit that prevents the safety circuit from breaking,
A device for preventing confinement of an elevator during an earthquake. A car door switch provided in the car, opened when the door is opened and closed when the door is closed;
A plurality of landing gate door switches that are provided at each floor landing and are opened when the door is opened and closed when the door is closed;
A limit switch for limiting the overrun on the upper part of the hoistway,
Limit switch for lower overpass restriction provided at the lower part of the hoistway,
A final limit switch for the end of the upper end provided at the upper end of the hoistway above the limit switch for limiting the upper overpass;
A final limit switch for the lower end of the lower end provided at the lower end of the hoistway below the limit switch for lower overpass limitation;
When a car running is detected and a large earthquake is detected, all of the plurality of landing gate door switches, upper limit limit switch for upper line limit, and final limit switch for upper end point are short-circuited for a certain period of time, A short circuit that prevents the safety circuit from breaking,
A device for preventing confinement of an elevator during an earthquake.   The short circuit is energized when it detects that the car is running, and is energized when the car arrives at the nearest floor and turns off when the door zone switch is opened. 3. The elevator confinement prevention apparatus according to claim 1 or 2, comprising a large earthquake detection relay and an operation relay operated for a fixed time until the nearest floor.

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