JP2021001047A - Elevator apparatus - Google Patents

Abstract

To provide a highly reliable elevator apparatus capable of preventing passengers from being confined even if a large quantity of water including disturbance flows into a pit.SOLUTION: An elevator apparatus with a gap between a landing door and a landing sill is provided with: a flooding detection device for detecting the flooding in a pit provided at the bottom of a hoistway; and a control device for switching the operation mode from a normal operation mode to a prescribed flooding management operation mode when the flooding detection device detects the flooding in the pit. The flooding detection device detects the flooding in the pit based on the water pressure of water flowing into the hoistway through the gap between the landing door and the landing sill.SELECTED DRAWING: Figure 8

Description

The present invention relates to an elevator device, and is suitable for application to, for example, an elevator device in which an electric device for controlling the operation of the elevator device is installed in a pit.

Conventionally, in an elevator device, a hoistway is formed deeper than the lowest floor where the car stops. The part from the floor of the lowest floor where the car stops to the floor of the hoistway is called a pit, and electronic devices for controlling the elevator device may be installed in the pit.

By the way, when flooding occurs due to a tsunami, flood, heavy rain, etc., water may flow into the pit of the elevator device, and the electronic devices installed in the pit may break down. Then, in the event of such a failure of the electronic device, the elevator device stops between the floors and the passengers are trapped in the car.

In order to prevent such a situation from occurring, the elevator device is equipped with a function to detect flooding, and when flooding is detected, the car is landed on the nearest floor at that time and the door is opened. Many technologies related to the above have been proposed.

For example, in Patent Document 1, the rising state of the water level in the hoistway is detected and calculated as the flooding speed, the flooding state based on the water level in the pit is predicted, and the elevator is urgently stopped, for example, when the water level rises sharply. A method of performing flood control operation at the optimum timing, such as sending passengers to the target floor and then forwarding them to the evacuation floor when the water level rises slowly and flooding, is disclosed.

International Publication No. 2000/035798

However, the method of implementing the flood control operation based on the prediction of the flood condition based on the amount of flood water disclosed in Patent Document 1, that is, the water level in the pit, cannot detect a large amount of water inflow such as a flood in time. There was a risk that the electrical equipment in the pit would be short-circuited due to flooding and passengers would be trapped in the car before the car could be safely stopped on the nearest floor.

Even if the prediction is based on the flooding speed (the rising speed of the water level in the pit), when a large amount of water including a large disturbance (for example, a large wave generated in the pit during a flood) flows into the pit. There was also a problem that it was difficult to accurately predict the flooding condition.

The present invention has been made in consideration of the above points, and proposes a highly reliable elevator device that can prevent and reliably prevent passengers from being trapped even when a large amount of water including disturbance flows into the pit. It is something to try.

In order to solve such a problem, in the present invention, in an elevator device provided with a gap between the landing door and the landing threshold, a flood detection device for detecting flooding in a pit provided at the bottom of a hoistway and the flood detection device. When the device detects flooding in the pit, a control device for switching the operation mode from the normal operation mode to a predetermined flood control operation mode is provided, and the flood detection device is provided between the landing door and the landing threshold. The flooding in the pit is detected based on the water pressure of the water flowing into the hoistway through the gap.

According to the present invention, flooding in the pit can be stably detected, and thus reliability that can prevent passengers from being trapped even when a large amount of water including disturbance flows into the pit. It is possible to realize a high-quality elevator device.

It is sectional drawing which shows the schematic structure of the elevator apparatus by this Embodiment. It is a front view which shows the schematic structure of the elevator apparatus by this embodiment. It is a perspective view which looked at the flooding detection device by this embodiment from the front direction. It is a perspective view which looked at the flooding detection device by this embodiment from the side direction. It is a flowchart which shows the processing content of the control device concerning the switching of the operation mode to the submerged control operation. It is sectional drawing which provides the explanation of the elevator apparatus at the time of flooding. It is a front view which provides the explanation of the elevator apparatus at the time of flooding. It is a perspective view of the state of the flood detection device at the time of flooding as seen from the side direction.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. In the following, there is no service floor of the elevator equipment in the basement of the building where the elevator equipment of this embodiment is installed, and the floor where water is expected to flow into the pit during floods and heavy rains is the lowest floor. It will be explained as if.

(1) Configuration of Elevator Device According to the Present Embodiment In FIG. 1, 1 indicates an elevator device according to the present embodiment as a whole. The elevator device 1 is provided in a hoistway 2 formed in the building, a car 3 for ascending and descending in the hoistway 2, and a landing on the lowest floor of the building (hereinafter, this is referred to as a landing on the lowest floor) 4. It is configured to include a provided landing door (hereinafter, this is referred to as a lowest floor landing door) 5.

A pit 2A is provided on the lower side of the hoistway 2, and a predetermined electric device 6 necessary for operation control of the elevator device 1 and an electric device 6 based on the output of the electric device 6 or the electric device 6 are provided in the pit 2A. A control device 7 that controls the operation of the entire elevator device 1 by controlling the above is installed. Further, as shown in FIGS. 1 and 2, in order to open and close the lowest floor landing door 5 between the lowest floor landing door 5 and the landing threshold (not shown) provided in the lowest floor landing 4. A slight gap H is provided.

3 and 4 show a flood detection device 10 provided on the lower side inside the landing door 5 on the lowest floor. The flood detection device 10 is a detection device for detecting flood in the pit 2A of the hoistway 2.

In practice, the submersion detection device 10 is provided with a bracket 11 fixed to the inner bottom surface of the lowest floor landing door 5 in the width direction of the lowest floor landing door 5 (direction indicated by arrow x in FIGS. 3 and 4 and vice versa). A shaft body 12 held in parallel with the direction) and a rotating body rotatably supported by the shaft body 12 in the clockwise and counterclockwise directions in a plane perpendicular to the width direction of the lowest floor landing door 5. It is configured with and.

The rotating body 13 is arranged so that its lower side projects into the gap H between the landing threshold and the bottom floor landing door 5 through an opening (not shown) provided on the lower end surface of the bottom floor landing door 5. For example, an elastic body 14 composed of a compression coil spring is urged in a direction (clockwise in FIG. 4) to rotate the upper side of the rotation center (central axis of the shaft body 12) toward the hoistway 2. ing.

Further, a detector 15 is arranged above the rotating body 13 inside the lowermost floor landing door 5, and a switch 16 is provided at the lower end of the detector 15. As shown in FIG. 4, the switch 16 is provided with a plate-shaped button 17 having an arc-shaped tip when viewed from the side surface side of the lowest floor landing door 5.

As a result, it flows into the hoistway 2 through the gap H between the landing threshold of the lowest floor landing 4 and the landing door 5 of the lowest floor, and the water pressure applied to the lower side of the rotating body 13 causes the rotating body 13 to flow. Overcomes the urging force of the elastic body 14 and rotates counterclockwise in FIG. 4, after the upper end of the rotating body 13 comes into contact with the button 17 of the switch 16, the upper end of the rotating body 13 comes into contact with the button 17. The switch 16 can be turned on by pushing up the button 17 while sliding on the end surface of the tip portion of the switch 16.

Further, the detector 15 is fixed to the inner lower end of the lowest floor landing door 5, and is at the logical "1" level during the period when the switch 16 is turned on (during the period when the upper end of the rotating body is pressed). The flood detection signal that rises in the door is transmitted to the control device 7.

When the logic level of the flood detection signal maintains the logic "1" level for a predetermined period or longer, the control device 7 changes the operation mode of the elevator device 1 to the normal operation mode (hereinafter, this is the normal operation). The mode is switched from the operation mode of the submerged control operation (hereinafter referred to as the submerged operation mode), and the car 3 is landed on the nearest floor at that time to open the door.

FIG. 5 shows the processing contents of the control device 7 regarding the switching of the operation mode to the submerged control operation mode. The control device 7 constantly monitors the flood detection signal given from the flood detection device 10 (FIGS. 3 and 4), and the logical level of the flood detection signal is a predetermined period of time (hereinafter referred to as the flood detection threshold value). (Called a period) Wait for the logical "1" level to be reached (S1). Then, when the logic level of the flood detection signal exceeds the flood detection threshold period and is the logic "1" level, the control device 7 switches the operation mode of the elevator device 1 from the normal operation mode to the flood control operation mode (S2). ).

Further, the control device 7 waits for the maintenance staff to perform maintenance and the operation mode switching operation to the normal operation mode (S3), and when the switching operation is performed, the elevator device 1 The operation mode is switched from the submerged transportation control control mode to the normal operation mode (S4). After that, the control device 7 returns to step S1 and repeats step S1 and subsequent steps in the same manner as described above.

(2) Operation and effect of the present embodiment In the elevator device 1 of the present embodiment having the above configuration, water 20 has flowed into the lowest floor landing 4 of the building as shown in FIGS. 6 and 7 due to flooding or the like. In this case, the water 20 that has entered the lowest floor landing 4 flows into the hoistway 2 through the gap H between the landing threshold of the lowest floor landing 4 and the lowest floor landing door 5 as shown in FIG. Then, pit 2A is flooded.

At this time, the water 20 of the lowest floor landing 4 pushes the lower side of the rotating body 13 (FIGS. 3 and 4) of the flood detection device 10 (FIGS. 3 and 4) toward the hoistway 2 while pushing the lowermost floor. It flows into the hoistway 2 through the gap H between the landing threshold of the landing 4 and the landing door 5 on the lowest floor.

Then, in the submersion detection device 10, the landing threshold of the lowest floor landing 4 is more than the urging force in the direction of rotating the elastic body 14 (FIGS. 3 and 4) toward the hoistway 2 given to the upper side of the rotating body 13. When the force (water pressure) that the water 20 flowing into the hoistway 2 through the gap H between the lowermost floor landing door 5 and the lowermost floor landing door 5 pushes the lower side of the rotating body 13 in the direction of the hoistway 2 becomes larger. As shown in FIG. 8, the rotating body 13 overcomes the urging force of the elastic body 14 and rotates in a direction in which the lower side thereof is rotated toward the hoistway 2 side (counterclockwise direction in FIG. 4). Then, with this rotation, the upper end portion of the rotating body 13 comes into contact with the button 17 of the switch 16, and the switch 16 is turned on by further pushing up the button 17.

In this case, the rotating body 13 has a water pressure at which the water 20 flowing into the hoistway 2 through the gap H between the landing threshold of the lowest floor landing 4 and the landing door 5 of the lowest floor overcomes the urging force of the elastic body 14. As long as the lower side is kept pushed in the direction of the hoistway 2, the switch 16 remains on, and during this time, the detector 15 outputs a logical "1" level submergence detection signal to the control device 7. To. Then, when the flood detection signal exceeds the flood detection threshold period and maintains the logical "1" level, the operation mode of the elevator device 1 by the control device 7 is switched to the flood control operation mode.

As described above, in the elevator device 1 of the present embodiment, the water pressure of the water 20 flowing into the hoistway 2 through the gap H between the landing threshold of the lowest floor landing 4 and the landing door 5 of the lowest floor is the highest. Since the submergence of the lower floor landing 4 is detected, even if a large amount of water 20 flows into the hoistway 2, it is accurately affected by disturbances such as large waves generated in the pit 2A. Flooding can be detected.

In this case, the water flow of the water 20 flowing through the gap H between the landing threshold of the lowest floor landing 4 and the landing door 5 of the lowest floor is more stable than, for example, the water flow of the water 20 after passing through such a gap. By utilizing the water pressure in the gap H, it is possible to stably detect flooding in advance and reliably.

Further, in the elevator device 1, the elastic body 14 is attached in the direction of rotating the upper side of the shaft body 12 toward the hoistway 2 so that the rotating body 13 of the flood detection device 10 cannot rotate unless a certain pressure or more is applied. Since the rotating body 13 is forced to rotate, it is possible to prevent the rotating body 13 from easily rotating due to wind or the like and turning on the switch 16. Further, by changing the elastic force of the elastic body 14, the submerged state to be detected can be easily adjusted according to the specifications of the elevator device 1 and the installation environment.

Further, in the present elevator device 1, in addition to this configuration, when the logical level of the flood detection signal output from the detector 15 rises to the logical "1" level for a period equal to or longer than the flood detection threshold time (that is, the flood detection device 10). Since the control device 7 switches the operation mode of the elevator device 1 to the flood control operation only when the flood is detected for more than the flood detection threshold time), the flood detection device 10 due to wind or the like causes erroneous detection of flood or flood control. It is possible to prevent the operation mode of the elevator device 1 from being switched to the submerged control operation due to the inflow of water that does not require operation into the hoistway, thereby ensuring safety and providing the service of the elevator device 1. You can keep your sex.

(3) Other Embodiments The present invention is not limited to the above-described embodiments, and includes various modifications. For example, in the above-described embodiment, the present invention has been described in detail in order to explain the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to the one including all the described configurations.

For example, in the above-described embodiment, the case where the elastic body 14 is composed of the compression coil spring has been described, but the present invention is not limited to this, and the point is that the upper side of the rotating body 13 is on the hoistway 2 side. If it is possible to urge the spring, a leaf spring other than the compression coil spring and various elastic bodies such as sponge or rubber can be widely applied.

Further, in the above-described embodiment, the case where the rotating body 13 is configured in the shape of a rectangular plate has been described, but the present invention is not limited to this, and various other configurations can be widely applied.

Further, in the above-described embodiment, the case where the switch 16 is arranged above the rotating body 13 has been described, but the present invention is not limited to this, and the point is that the landing threshold of the lowest floor landing 4 is used. If it can be turned on by the rotating body 13 rotated by the water pressure of the water 20 flowing into the hoistway 2 through the gap H between the bottom floor landing door 5, the position of the switch 16 and the button 17 As the structure of, various positions and structures can be widely applied.

The present invention can be applied to an elevator device in which a gap is provided between a landing door and a landing threshold.

1 ... Elevator device, 2 ... Hoistway, 2A ... Pit, 4 ... Bottom floor landing, 5 ... Bottom floor landing door, 7 ... Control device, 10 ... Submersion detection device, 12 ... Shaft body, 13 ... Rotating body, 14 ... Elastic body, 15 ... Detector, 16 ... Switch, 17 ... Button, 20 ... Water, H ... Gap.

Claims (3)

In an elevator device with a gap between the landing door and the landing threshold
A flood detection device that detects flooding in the pit provided at the bottom of the hoistway,
A control device for switching the operation mode from the normal operation mode to a predetermined submersion control operation mode when the submersion in the pit is detected by the submersion detection device is provided.
The flood detection device is
An elevator device for detecting submergence in a pit based on the water pressure of water flowing into a hoistway through the gap between the landing door and the landing threshold. The flood detection device is
At the inner lower end of the landing door, it is rotatable in the clockwise and counterclockwise directions in a plane perpendicular to the width direction of the landing door, and the lower side protrudes into the gap between the landing door and the landing threshold. With the rotating body arranged so as to
An elastic body that biases the upper side of the rotation center of the rotating body toward the hoistway side,
It is provided with a switch that is turned on by the rotating body that rotates by overcoming the urging force of the elastic body by the water pressure of water flowing into the hoistway through the gap between the landing door and the landing threshold.
The elevator device according to claim 1, wherein when the switch is turned on, the submergence in the pit is detected. The control device is
2. The second aspect of the present invention is characterized in that the operation mode is switched from the normal operation mode to the submersion operation mode when the submersion detection device detects the submergence in the pit beyond a predetermined time set in advance. The elevator device described.

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