JP2024155349A - Elevator - Google Patents

Abstract

[Problem] To provide an elevator capable of preventing a counterweight from entering water when a hoistway is flooded. [Solution] The elevator includes a car that travels in an up and down direction, a car rope connected to the car, a counterweight that is connected to the car rope and that descends as the car ascends and rises as the car descends, a processing unit that runs the car in a running range that is equal to or higher than a first lower platform height, which is the height of the car located at a platform on the lowest floor, and equal to or lower than a first upper platform height, which is the height of the car located at a platform on the highest floor, and a first water level detection unit that detects when the water level in the hoistway reaches a first water height, the first water height being lower than the bottom end position of the counterweight when the car is located at the first upper platform height, and when the first water level detection unit detects the water level, the processing unit runs the car in a running range that is equal to or lower than a second upper platform height, which is the height of the car located at a platform on the second highest floor. [Selected Figure] Figure 5

Description

This application relates to elevators.

Conventionally, for example, elevators are equipped with a car, a counterweight, a car rope connecting the car and the counterweight, and a water level detector that detects the water level in the elevator shaft (for example, see Patent Document 1). When the water level detector detects the water level, the car's travel range is changed to only the upper floors. While this prevents the car from entering the water, there is a risk that the counterweight may enter the water.

JP 2022-141341 A

Therefore, the challenge is to provide an elevator that can prevent the counterweight from entering the water if the hoistway becomes flooded.

The elevator is
The car travels up and down,
A cage rope connected to the cage;
a counterweight connected to the car rope, the counterweight descending as the car ascends and ascending as the car descends;
a processing unit that runs the car in a running range that is equal to or higher than a first lower platform height, which is a height of the car located at a platform on the lowest floor, and equal to or lower than a first upper platform height, which is a height of the car located at a platform on the highest floor;
a first water level detection unit that detects when the water level in the elevator shaft reaches a first water height;
The first water level is lower than a lower end position of the counterweight when the car is located at the first upper landing level,
When the first water level detection unit detects a water level, the processing unit causes the car to run within a running range below a second upper platform height, which is the height of the car located at the platform on the second floor from the top.

Schematic diagram of an elevator according to an embodiment. FIG. 1 is a schematic diagram of an upper side of an elevator according to the embodiment; FIG. 1 is a schematic diagram of the lower side of an elevator according to the embodiment; FIG. 3 is a control block diagram of an elevator according to the embodiment. FIG. 2 is a control flow diagram of the elevator according to the embodiment.

In each drawing, the dimensions of the components may be enlarged or reduced relative to their actual dimensions, for example, to facilitate understanding, and the dimensional ratios between the drawings may not be consistent. In addition, in each drawing, some of the components may be omitted, for example, to facilitate understanding.

Terms including ordinal numbers such as first and second are used to describe various components, but these terms are used only for the purpose of distinguishing one component from another, and the components are not particularly limited by these terms. Note that the number of components including ordinal numbers is not particularly limited, and may be, for example, one. Also, the ordinal numbers used in the following specification and drawings may differ from the ordinal numbers described in the claims.

One embodiment of an elevator will be described below with reference to Figures 1 to 5. Note that the following embodiment is provided as an example to aid in understanding the elevator configuration, and is not intended to limit the elevator configuration.

As shown in FIG. 1, the elevator 1 may include, for example, a car 2 for people (passengers) to ride in, a car rope 3 connected to the car 2, a counterweight 4 connected to the car rope 3, a hoist 5 that drives the car rope 3 to move the car 2 and the counterweight 4 in the vertical direction D3, a car rail 6 that guides the car 2, a counterweight rail 7 that guides the counterweight 4, and a processing unit 8 having a control panel 8a that controls each part of the elevator 1.

As a result, the processing unit 8 controls the hoist 5, so that the car 2 and the counterweight 4 travel in the vertical direction D3. Specifically, when the car 2 rises, the counterweight 4 descends, when the car 2 descends, the counterweight 4 rises, and when the car 2 stops, the counterweight 4 stops.

The hoisting machine 5 may include, for example, as in this embodiment, a sheave 5a around which the car rope 3 is wound, a drive source 5b (e.g., a motor) that rotates the sheave 5a, and a braking unit 5c (e.g., a brake) that brakes the sheave 5a. Note that the elevator 1 according to this embodiment is configured such that the hoisting machine 5 is disposed inside the hoistway X1, but is not limited to such a configuration. For example, the hoisting machine 5 may be disposed inside a machine room provided at the top of the hoistway X1.

In addition, in this embodiment, both ends of the car rope 3 are fixed to the upper and lower parts of the elevator shaft X1, and the car rope 3 is wound around the sheaves of the car 2 and the counterweight 4, respectively, thereby connecting the car rope 3 to the car 2 and the counterweight 4, respectively, but this is not limited to the configuration. For example, a configuration in which a first end of the car rope 3 is fixed to the car 2 and a second end of the car rope 3 is fixed to the counterweight 4 may also be used.

The elevator 1 may also include, for example, as in this embodiment, a moving cable 9 that electrically connects the car 2 and the control panel 8a, and a support unit 10 that supports the moving cable 9. Note that the support unit 10 may be fixed to the car rail 6, for example, as in this embodiment, or may be fixed to the weight rail 7, for example, or may be fixed to the hoistway X1, for example. That is, the support unit 10 only needs to be fixed to the hoistway X1.

The moving cable 9 may, for example, as in this embodiment, have a fixed portion 9a between the portion supported by the support portion 10 and the control panel 8a, and a moving portion 9b between the portion supported by the support portion 10 and the car 2. As a result, the moving portion 9b moves as the car 2 rises and falls. Note that, for example, as in this embodiment, the lower end position of the moving cable 9 may be located lower than the lower end position of the car 2.

As shown in Figures 2 and 3, for example, a plurality of landings X2 to X7 are provided. The number of landings X2 to X7 is not particularly limited. Figure 2 illustrates the first upper landing X2, which is the landing X2 on the top floor, the second upper landing X3, which is the landing X3 on the second floor from the top, and the third upper landing X4, which is the landing X4 on the third floor from the top, while Figure 3 illustrates the first lower landing X5, which is the landing X5 on the bottom floor, the second lower landing X6, which is the landing X6 on the second floor from the bottom, and the third lower landing X7, which is the landing X7 on the third floor from the bottom.

The elevator 1 may, for example, as in this embodiment, include a landing door 11 that opens and closes an entrance that connects the elevator shaft X1 to the landings X2 to X7, and a landing operating panel 12 that is operated to operate the car 2. Although not shown, the landing operating panel 12 may, for example, include an up call input unit to which an instruction to call the car 2 to rise is input, and a down call input unit to which an instruction to call the car 2 to descend is input.

The elevator 1 may also include, for example, a car operating panel 13 inside the car 2, which is operated to operate the car 2, as in this embodiment. Although not shown, the car operating panel 13 may also include a destination input unit to which instructions for the destination of the car 2 are input, a door opening input unit to which instructions to open the doors of the car 2 and the landing doors 11 are input, and a door closing input unit to which instructions to close the doors of the car 2 and the landing doors 11 are input.

Also, as in this embodiment, the elevator 1 may be equipped with a plurality of detectable parts 14 arranged at each of the landings X2 to X7, and a landing detection unit 15 that is fixed to the car 2 and detects the detectable parts 14 when the car 2 is located at each of the landings X2 to X7. As a result, the landing detection unit 15 detects the detectable parts 14 when the car 2 is located at (stops at or passes through) each of the landings X2 to X7.

For example, but not limited to, the platform detection unit 15 may be a photoelectric sensor in which the light-emitting unit and the light-receiving unit are separate components, and the detected unit 14 may be a light-shielding plate that blocks light between the light-emitting unit and the light-receiving unit. For example, the platform detection unit 15 may be a photoelectric sensor in which the light-emitting unit and the light-receiving unit are one component, and the detected unit 14 may be a reflecting plate that reflects light from the light-emitting unit toward the light-receiving unit. For example, the platform detection unit 15 may be a contact sensor, and the detected unit 14 may be a protruding object that comes into contact with the contact sensor.

As a result, when the hall detection unit 15 detects each detected portion 14, the hall detection unit 15 outputs the same signal to the processing unit 8. In other words, while the hall detection unit 15 detects that the car 2 is located at halls X2 to X7, the hall detection unit 15 does not identify and detect which of the halls X2 to X7 on which floor the car 2 is located.

The detected part 14 may be fixed to the car rail 6, as in this embodiment, or may be fixed to the weight rail 7, or may be fixed to the elevator shaft X1. That is, it is sufficient that the detected part 14 is fixed to the elevator shaft X1.

The elevator 1 may also be equipped with multiple car detectors 21-26 that detect when the car 2 is located at a predetermined height, as in this embodiment. The number of car detectors 21-26 is not particularly limited, but is six in this embodiment. The first to sixth car detectors 21-26 each detect when the car 2 is located at the first to sixth car heights.

In this embodiment, the first car height is lower than the first descending platform height, the second car height is a height between the first descending platform height and the second descending platform height, and the third car height is a height between the second descending platform height and the third descending platform height. Note that the first descending platform height is the height of car 2 when it is located (landed) at the first descending platform X5, the second descending platform height is the height of car 2 when it is located (landed) at the second descending platform X6, and the third descending platform height is the height of car 2 when it is located (landed) at the third descending platform X7.

In addition, in this embodiment, the fourth car height is a height between the first upper platform height and the second upper platform height, the fifth car height is a height between the second upper platform height and the third upper platform height, and the sixth car height is higher than the first upper platform height. Note that the first upper platform height is the height of the car 2 when it is located (landed) at the first upper platform X2, the second upper platform height is the height of the car 2 when it is located (landed) at the second upper platform X3, and the third upper platform height is the height of the car 2 when it is located (landed) at the third upper platform X4.

The configuration of the car detectors 21-26 is not particularly limited as long as they can detect the position of the car 2. The car detectors 21-26 may be, for example, contact sensors or non-contact photoelectric sensors. For example, the car detectors 21-26 may output the presence or absence of detection of the car 2 to the processing unit 8 as an electrical signal.

The car detectors 21-26 may be fixed to the car rail 6, as in this embodiment, or may be fixed to the weight rail 7, or may be fixed to the elevator shaft X1. That is, the car detectors 21-26 only need to be fixed to the elevator shaft X1.

The elevator 1 may also be equipped with multiple water level detection units 31-33 that detect when the water level in the hoistway X1 reaches a predetermined height, as in this embodiment. The number of water level detection units 31-33 is not particularly limited, but is three in this embodiment. The first to third water level detection units 31-33 each detect when the water level in the hoistway X1 reaches the first to third water levels.

In this embodiment, the first water height is lower than the lower end position of the counterweight 4 when the car 2 is located at the first upper landing height, the second water height is lower than the lower end position of the moving cable 9 when the car 2 is located at the first lower landing height, and the third water height is higher than the first water height and the second water height and lower than the position of the first car detection unit 21. For example, the first water height may be higher than the second water height as in this embodiment. Also, for example, the third water height may be lower than the lower end position of the car 2 when the car 2 is located at the first lower landing height.

The configuration of the water level detection units 31 to 33 is not particularly limited as long as they can detect the water level in the elevator shaft X1. The water level detection units 31 to 33 may be, for example, float-type sensors or electrode rod-type sensors.

The water level detection units 31 to 33 may be fixed to the weight rail 7, as in this embodiment, or may be fixed to the car rail 6, or may be fixed to the elevator shaft X1. In other words, it is sufficient that the water level detection units 31 to 33 are fixed to the elevator shaft X1.

As shown in FIG. 4, the elevator 1 may be equipped with, for example, a travel detection unit 16 that detects the travel distance of the car 2. The configuration of the travel detection unit 16 is not particularly limited as long as it can detect the travel distance of the car 2. The travel detection unit 16 may be, for example, an encoder that detects the amount of rotation of the sheave 5a.

The processing unit 8 may include, for example, an acquisition unit 8b that acquires each piece of information from each unit 12, 13, 15, 16, 21-26, 31-33, a memory unit 8c that stores each piece of information, a calculation unit 8d that calculates each piece of information, and a control unit 8e that controls each unit 5. And, for example, the processing unit 8 may control the running of the car 2 by controlling the hoist 5.

The processing unit 8 may be a computer equipped with a processor such as a CPU and an MPU (e.g., a calculation unit 8d, a control unit 8e), a memory such as a ROM and a RAM (e.g., an acquisition unit 8b, a storage unit 8c), various interfaces (e.g., an acquisition unit 8b), etc. As a result, the processor executes a program stored in the memory, and the various units 8b to 8e of the processing unit 8 are realized by the software and hardware working together.

The processing unit 8 may be configured, for example, as a single device 8a, or may be configured, for example, as multiple devices 8a that can communicate with each other. Specifically, each of the units 8b to 8e of the processing unit 8 may be provided, for example, in a single device 8a, or may be provided, for example, distributed across multiple devices 8a that can communicate with each other.

The configuration of the elevator 1 according to this embodiment is as described above. Next, the control of the elevator 1 according to this embodiment will be described with reference to FIG. 5. Note that the following description is provided as an example to help understand the control of the elevator 1, and is not intended to limit the control of the elevator 1.

As shown in FIG. 5, when the water level detection units 31-33 do not detect a water level, i.e., in the normal case where water is not flowing into the elevator shaft X1, the processing unit 8 executes normal running control (S1 in FIG. 5). The running range of the car 2 during normal running control is equal to or greater than the height of the first lower platform and equal to or less than the height of the first upper platform.

If the second water level detection unit 32 detects a water level due to water flowing into the elevator shaft X1 ("Y" in S2 of FIG. 5), the processing unit 8 executes the bottom limit travel control (S3 of FIG. 5). This changes the travel range of the car 2. Specifically, the travel range of the car 2 during the bottom limit travel control is equal to or greater than the second lower landing height.

This makes it possible to prevent the moving cable 9 from entering the water. Therefore, for example, it is possible to prevent water from dripping from the moving cable 9 and causing water to be sprayed into the hoistway X1. It is also possible to prevent the car 2 from entering the water. Therefore, for example, it is possible to maintain the safety of the car 2's travel, and it is also possible to prevent water from dripping from the car 2 and causing water to be sprayed into the hoistway X1.

After that, when the water level in the elevator shaft X1 drops and the second water level detection unit 32 no longer detects the water level ("N" in S6 in FIG. 5), the processing unit 8 releases the lower limit travel control (S7 in FIG. 5) and automatically restores the system. Note that this control is not limited to this, and even if the second water level detection unit 32 no longer detects the water level, for example, the processing unit 8 may maintain the lower limit travel control until a restoration signal is input by the input unit (e.g., a reset button).

In addition, if water further flows into the elevator shaft X1 and the first water level detection unit 31 detects a water level ("Y" in S4 of FIG. 5), the processing unit 8 executes upper limit travel control (S5 of FIG. 5). This changes the travel range of the car 2. Specifically, the travel range of the car 2 during the upper limit travel control is equal to or lower than the height of the second upper landing.

This makes it possible to prevent the counterweight 4 from entering the water. Therefore, for example, it is possible to maintain the safety of the car 2 traveling, and it is also possible to prevent water from dripping from the counterweight 4 and causing water to be sprayed into the hoistway X1.

After that, when the water level in the elevator shaft X1 drops and the first water level detection unit 31 no longer detects the water level ("N" in S11 in FIG. 5), the processing unit 8 releases the upper limit travel control (S12 in FIG. 5) and automatically restores the system. Note that this control is not limited to this, and even if the first water level detection unit 31 no longer detects the water level, for example, the processing unit 8 may maintain the upper limit travel control until a restoration signal is input by the input unit (e.g., a reset button).

In addition, if water further flows into the elevator shaft X1 and the third water level detection unit 33 detects a water level ("Y" in S8 of FIG. 5), the processing unit 8, for example, stops the traveling car 2 at the nearest hall X2-X7 (S9 in FIG. 5), and then stops the traveling of the car 2 (S10 in FIG. 5). Note that "stop" means, for example, that the traveling car 2 stops, and "pause" means, for example, that the car 2 does not travel even if information is input to the hall operating panel 12 and the car operating panel 13 after the car 2 has stopped.

This makes it possible to prevent the counterweight 4, the moving cable 9, and the car 2 from entering the water. In addition, since the third water level is lower than the position of the first car detection unit 21 when the first car detection unit 21 outputs an electrical signal to the processing unit 8, in the unlikely event that the first car detection unit 21 becomes submerged in water, the car 2 is prevented from moving.

After that, even if the water level in the elevator shaft X1 drops and the third water level detection unit 33 no longer detects the water level, the processing unit 8 maintains the suspension of the car 2's travel until a recovery signal is input by the input unit (e.g., a reset switch). Note that this is not the only control, and for example, when the third water level detection unit 33 no longer detects the water level, the processing unit 8 may release the suspension of the car 2's travel and automatically restore it.

Next, the controls other than the normal driving control, lower limit driving control, and upper limit driving control will be explained below.

<Normal driving control>
First, the normal driving control other than the above will be described below.

<Normal driving control>
The processing unit 8 may, for example, calculate the destination position of the car 2 (the landing height at which the car 2 lands) based on information input to the hall operating panel 12 and the car operating panel 13. The processing unit 8 may also calculate the position of the car 2 based on detection by the hall detection unit 15 and the travel detection unit 16, for example, and the processing unit 8 may control the hoist 5 to make the car 2 travel to the destination position and stop it.

The processing unit 8 may be configured to calculate the current floor position of the car 2 based on the detection of the hall detection unit 15, for example. Note that a floor refers to the range between a predetermined hall height and a hall height adjacent to that hall height.

The processing unit 8 may calculate that the car 2 is located at the next higher level, for example, when the platform detection unit 15 detects the detectable part 14 as the car 2 rises. As an example, if the position of the car 2 calculated by the processing unit 8 (hereinafter referred to as the "calculated car position") is the first lower level (a level from the first lower platform height to the second lower platform height), the platform detection unit 15 detects the detectable part 14 as the car 2 rises, and the calculated car position is set to the second lower level (a level from the second lower platform height to the third lower platform height).

The processing unit 8 may also calculate that the car 2 is located at the next lower level, for example, when the platform detection unit 15 detects the detected part 14 when the car 2 descends. As an example, if the calculated car position is the first upper level (a level from the first upper platform height to the second upper platform height), the platform detection unit 15 detects the detected part 14 when the car 2 descends, and the calculated car position is set to the second upper level (a level from the second upper platform height to the third upper platform height).

The processing unit 8 may be configured to calculate the current position of the car 2 by calculating the travel distance of the car 2 from a specific platform height based on the detection of the travel detection unit 16. Note that, for example, the specific platform height may be the platform height immediately before the destination position of the car 2 (the platform height at which the car 2 lands).

Since the processing unit 8 stores, for example, the distance between each landing height, when the calculated car position becomes the set position, the processing unit 8 decelerates the car 2, and then when the landing detection unit 15 detects the detected part 14, the processing unit 8 stops the car 2. As a result, the car 2 stops at the target position.

<Safety control of car descent during normal driving control>
In the above car travel control, if the calculated car position is incorrect, car 2 may move below the first lower platform height. For example, when car 2 is located at the lowest floor (the first lower floor between the first lower platform height and the second lower platform height), if the calculated floor is incorrect, car 2 may move below the lowest floor (the first lower platform height).

Therefore, since the second car height is a position between the first lower landing height and the second lower landing height, for example, the processing unit 8 may be configured to reset the hierarchical level of the calculated car position to the hierarchical level of the second car height (the lowest hierarchical level) when the second car detection unit 22 detects car 2. This makes it possible to reset the hierarchical level of the calculated car position to an appropriate hierarchical level if the hierarchical level of the calculated car position is different from the lowest hierarchical level when car 2 is located at the second car height, which is the lowest hierarchical level.

In addition, since the second car height is a height between the first lower platform height and the second lower platform height, for example, when the second car detection unit 22 detects car 2, if the descent speed of car 2 is equal to or greater than a set speed, the processing unit 8 may be configured to control the driving source 5b to slow down the speed of car 2. This allows the speed of car 2 to be appropriately slowed down, and therefore, for example, it is possible to prevent car 2 from moving downward below the first lower platform height.

In addition, since the first car height is lower than the first lower landing height, for example, when the first car detection unit 21 detects car 2, the processing unit 8 may be configured to stop car 2 by not only controlling the driving source 5b but also operating (controlling) the braking unit 5c. This makes it possible to prevent car 2, which is lower than the first lower landing height, from moving further downward, for example.

In addition, since the first cage detection unit 21 outputs an electrical signal to the processing unit 8, there is a risk that the control cannot be executed if the first cage detection unit 21 is flooded. In contrast, when the third water level detection unit 33 detects the water level ("Y" in S8 of FIG. 5), the running of cage 2 is stopped (S10 of FIG. 5), so the running of cage 2 is stopped before the first cage detection unit 21 is flooded.

<Car lift safety control during normal driving control>
Furthermore, in the above car travel control, if the calculated car position is incorrect, there is a risk that car 2 will move above the first upper platform height. For example, when car 2 is located at the top floor (the first upper floor between the first upper platform height and the second upper platform height), if the calculated floor is incorrect, there is a risk that car 2 will move above the top floor (the first lower platform height).

Therefore, since the fourth car height is a position between the first upper landing height and the second upper landing height, for example, when the fourth car detection unit 24 detects car 2, the processing unit 8 may reset the floor of the calculated car position to the floor of the fourth car height (the top floor). In this way, when car 2 is located at the fourth car height, which is the top floor, if the floor of the calculated car position is different from the top floor, the floor of the calculated car position can be reset to an appropriate floor.

In addition, since the fourth car height is a height between the first upper landing height and the second upper landing height, for example, when the fourth car detection unit 24 detects car 2, if the rising speed of car 2 is equal to or higher than a set speed, the processing unit 8 may be configured to slow down the speed of car 2 by controlling the driving source 5b. This allows the speed of car 2 to be appropriately slowed down, so that, for example, it is possible to prevent car 2 from moving above the first upper landing height.

In addition, since the sixth car height is higher than the first upper landing height, for example, when the sixth car detection unit 26 detects car 2, the processing unit 8 may be configured to stop car 2 by not only controlling the driving source 5b but also operating (controlling) the braking unit 5c. This makes it possible to prevent car 2, which is above the first upper landing height, from moving further upward, for example.

<Cage descent safety control with lower limit travel control>
Next, the car descent safety control in the bottom limit travel control will be described below. Specifically, since the travel range of the car 2 in the bottom limit travel control is equal to or higher than the second lower landing height, the car descent safety control in the bottom limit travel control is changed as follows from the car descent safety control in the normal travel.

The lowest level during bottom limit travel control is the second lower level between the second lower platform height and the third lower platform height. Therefore, since the third car height is between the second lower platform height and the third lower platform height, during bottom limit travel control, for example, the third car detection unit 23 may detect car 2, causing the processing unit 8 to reset the level of the calculated car position to the second lower level.

As a result, when car 2 is positioned at the third car height, which is higher than the second lower landing height, if the floor of the calculated car position is different from the lowest floor, the floor of the calculated car position can be set to an appropriate floor. Therefore, even during bottom limit travel control, the floor of the calculated car position can be reset to the lowest floor. In this way, regardless of whether or not the second water level detection unit 32 detects the water level of the second water height, the floor of the calculated car position can be reset to the lowest floor.

In addition, since the third car height is a height between the second lower platform height and the third lower platform height, for example, when the third car detection unit 23 detects car 2 during the lower limit travel control, if the descent speed of car 2 is equal to or greater than the set speed, the processing unit 8 may be configured to slow down the speed of car 2 by controlling the driving source 5b. This allows the speed of car 2 to be appropriately slowed down, so that, for example, during the lower limit travel control, it is possible to prevent car 2 from moving below the second lower platform height.

In addition, since the second car height is lower than the second lower platform height, for example, when the second car detection unit 22 detects car 2 during lower limit travel control, the processing unit 8 may be configured to stop car 2 by not only controlling the driving source 5b but also operating (controlling) the braking unit 5c. This makes it possible to prevent car 2, which is below the second lower platform height, from moving further downward during lower limit travel control, for example.

<Car ascent safety control with upper limit travel control>
Next, the car ascent safety control in the upper limit travel control will be described below. Specifically, since the travel range of the car 2 in the upper limit travel control is equal to or lower than the height of the second upper landing, the car ascent safety control in the upper limit travel control is changed as follows from the car ascent safety control in the normal travel.

The top floor during upper limit travel control is the second upper floor between the second upper landing height and the third upper landing height. Therefore, during upper limit travel control, for example, the fifth car detection unit 25 may detect car 2, and the processing unit 8 may reset the floor of the calculated car position to the second upper floor.

As a result, when car 2 is positioned at the fifth car height, which is lower than the second upper landing height, if the floor of the calculated car position is different from the top floor, the floor of the calculated car position can be set to an appropriate floor. Therefore, even during upper limit travel control, the floor of the calculated car position can be reset to the top floor. In this way, regardless of whether or not the first water level detection unit 31 detects the water level of the first water height, the floor of the calculated car position can be reset to the top floor.

In addition, since the fifth car height is a height between the second upper landing height and the third upper landing height, for example, when the fifth car detection unit 25 detects car 2 during upper limit travel control, if the rising speed of car 2 is equal to or greater than the set speed, the processing unit 8 may be configured to slow down the speed of car 2 by controlling the driving source 5b. This allows the speed of car 2 to be appropriately slowed down, so that, for example, during upper limit travel control, it is possible to prevent car 2 from moving above the second upper landing height.

In addition, since the fourth car height is higher than the second upper landing height, for example, when the fourth car detection unit 24 detects car 2 during upper limit travel control, the processing unit 8 may be configured to stop car 2 by not only controlling the driving source 5b but also operating (controlling) the braking unit 5c. This makes it possible to prevent car 2, which is above the second upper landing height, from moving further upward during upper limit travel control, for example.

[1]
As described above, the elevator 1 according to the present embodiment has the following features:
A car 2 traveling in a vertical direction D3,
A cage rope 3 connected to the cage 2;
a counterweight 4 connected to the car rope 3, which descends as the car 2 ascends and which ascends as the car 2 descends;
A processing unit 8 that runs the car 2 in a running range that is equal to or higher than a first lower platform height, which is the height of the car 2 located at the platform X5 on the lowest floor, and equal to or lower than a first upper platform height, which is the height of the car 2 located at the platform X2 on the highest floor;
A first water level detection unit 31 that detects when the water level in the elevator shaft X1 reaches a first water height,
The first water level is lower than a lower end position of the counterweight 4 when the car 2 is located at the first upper landing level,
When the first water level detection unit 31 detects a water level, the processing unit 8 causes the car 2 to travel within a travel range equal to or lower than a second upper landing height, which is a height of the car 2 located at the landing X3 on the second floor from the top.
This configuration is preferred.

With this configuration, the first water level is lower than the lower end position of the counterweight 4 when the car 2 is located at the first upper landing height, and when the first water level detector 31 detects a water level at the first water level, the car 2 travels within a travel range below the second upper landing height. This makes it possible to prevent the counterweight 4 from entering the water when the elevator shaft X1 is flooded.

[2]
In addition, in the elevator 1 of [1] above, as in this embodiment,
The processing unit 8 includes a control panel 8a.
The elevator 1 is
A moving cable 9 connecting the car 2 and the control panel 8a;
A second water level detection unit 32 that detects when the water level in the elevator shaft X1 reaches a second water height,
The second water level is lower than the lower end position of the moving cable 9 when the car 2 is located at the first lower landing level,
When the second water level detection unit 32 detects a water level, the processing unit 8 causes the car 2 to travel within a travel range equal to or higher than a second lower platform height, which is a height of the car 2 located at the platform X6 on the second floor from the bottom.
This configuration is preferred.

According to this configuration, when the second water level detection unit 32 detects a water level of the second water level, which is lower than the lower end position of the moving cable 9 when the car 2 is located at the first lower landing height, the car 2 travels in a traveling range equal to or higher than the second lower landing height. This makes it possible to prevent the moving cable 9 from entering the water when the elevator shaft X1 is flooded.

[3]
In addition, the elevator 1 of [2] above, as in this embodiment,
Further provided is a third water level detection unit 33 for detecting when the water level in the elevator X1 reaches a third water height,
The third water level is higher than the first water level and the second water level,
The processing unit 8 stops and pauses the travel of the car 2 when the third water level detection unit 33 detects a water level.
This configuration is preferred.

With this configuration, when the third water level is higher than the first water level and the second water level and the third water level detection unit 33 detects a water level of the third water level, the car 2 stops traveling and pauses. This makes it possible to prevent the counterweight 4, the moving cable 9, and the car 2 from entering the water.

[4]
In addition, the elevator 1 of the above [3] is, as in this embodiment,
A first car detection unit 21 is fixed to the elevator shaft X1 and detects that the car 2 is located at a first car height.
The first car height is lower than the first lower landing height,
The processing unit 8 stops the car 2 when the first car detection unit 21 detects the car 2,
The first cage detection unit 21 outputs the presence or absence of detection of the cage 2 to the processing unit 8 as an electrical signal,
The third water level is lower than the position of the first cage detection unit 21.
This configuration is preferred.

With this configuration, when the first car height is lower than the first lower platform height and the first car detection unit 21 detects car 2 at the first car height, car 2 stops. This makes it possible to prevent car 2 from moving too far below the first lower platform height.

However, since the first cage detection unit 21 outputs an electrical signal to the processing unit 8 indicating whether or not cage 2 has been detected, there is a risk that this prevention cannot be performed if the first cage detection unit 21 is flooded. Therefore, when the third water level detection unit 33 detects a water level of the third water level, even though the third water level is lower than the position of the first cage detection unit 21, the travel of cage 2 is stopped and paused. As a result, the travel of cage 2 is stopped and paused before the first cage detection unit 21 is flooded.

[5]
In addition, any one of the elevators 1 described above in [2] to [4] may be, as in this embodiment,
A plurality of detection targets 14 are fixed to the elevator shaft X1 and disposed at each of the landings X2 to X7;
a hall detection unit 15 that is fixed to the car 2 and detects the detection target unit 14 when the car 2 is located at each of the halls X2 to X7;
a second car detection unit 22 that is fixed to the elevator shaft X1 and detects that the car 2 is located at a second car height;
and a third car detection unit 23 that is fixed to the elevator shaft X1 and detects that the car 2 is located at a third car height.
The second car height is a position between the first lower landing height and the second lower landing height,
The third car height is a position between the second lower landing height and a third lower landing height which is the height of the car 2 located at the landing X7 on the third floor from the bottom,
The processing unit 8 calculates a floor position of the car 2 based on the detection of the hall detection unit 15,
The processing unit 8 resets the floor position of the car 2 to be calculated to the floor of the second car height by the second car detection unit 22 detecting the car 2,
When the second water level detection unit 32 detects the water level, the processing unit 8 resets the calculated floor position of the car 2 to the floor of the third car height by the third car detection unit 23 detecting the car 2.
This configuration is preferred.

With this configuration, when the car 2 is located at each of the landings X2 to X7, the landing detection unit 15 detects the detected portion 14, and the processing unit 8 calculates the floor position of the car 2 based on the detection of the landing detection unit 15. However, when the car 2 is located at the lowest floor (the first lower floor between the first lower landing height and the second lower landing height), if the calculated floor is incorrect, there is a risk that the car 2 will move below the lowest floor.

Therefore, when the second car height is a position between the first lower landing height and the second lower landing height, the second car detection unit 22 detects car 2 at the second car height, and the processing unit 8 resets the calculated floor position of car 2 to the floor of the second car height (the lowest floor). This makes it possible to reset the floor of the calculated car position to an appropriate floor if the floor of the calculated car position is different from the lowest floor when car 2 is located at the second car height, which is the lowest floor.

When the second water level detection unit 32 detects a water level of the second water height, the car 2 travels in a travel range equal to or greater than the second lower platform height. Therefore, while the third car height is a position between the second lower platform height and the third lower platform height, when the second water level detection unit 32 detects a water level of the second water height, the third car detection unit 23 detects the car 2, and the processing unit 8 resets the calculated floor position of the car 2 to the floor of the third car height.

As a result, even if the second water level detection unit 32 detects a water level of the second water height and the car 2 travels in a travel range equal to or higher than the second lower platform height, the calculated floor position of the car 2 can be reset to the lowest floor (the second lower floor between the second lower platform height and the third lower platform height). Therefore, regardless of whether or not the second water level detection unit 32 detects a water level of the second water height, the calculated floor position of the car 2 can be reset to the lowest floor.

[6]
In addition, any one of the elevators 1 described above in [1] to [5] may be, as in this embodiment,
A plurality of detection targets 14 are fixed to the elevator shaft X1 and disposed at each of the landings X2 to X7;
a hall detection unit 15 that is fixed to the car 2 and detects the detection target unit 14 when the car 2 is located at each of the halls X2 to X7;
a fourth car detection unit 24 that is fixed to the elevator shaft X1 and detects that the car 2 is located at a fourth car height;
A fifth car detection unit 25 is fixed to the elevator shaft X1 and detects that the car 2 is located at a fifth car height.
The fourth car height is a position between the first upper landing height and the second upper landing height,
The fifth car height is a position between the second upper landing height and a third upper landing height, which is the height of the car 2 located at the landing X4 on the third floor from the top,
The processing unit 8 calculates a floor position of the car 2 based on the detection of the hall detection unit 15,
The processing unit 8 resets the floor position of the car 2 to be calculated to the floor of the fourth car height by the fourth car detection unit 24 detecting the car 2,
When the first water level detection unit 31 detects the water level, the processing unit 8 resets the calculated floor position of the car 2 to the floor of the fifth car height by the fifth car detection unit 25 detecting the car 2.
This configuration is preferred.

With this configuration, when the car 2 is located at each of the landings X2 to X7, the landing detection unit 15 detects the detected part 14, and the processing unit 8 calculates the floor position of the car 2 based on the detection of the landing detection unit 15. However, when the car 2 is located at the top floor (the first upper floor between the first upper landing height and the second upper landing height), if the calculated floor is incorrect, there is a risk that the car 2 will move above the top floor.

Therefore, when the fourth car height is a position between the first upper landing height and the second upper landing height, the fourth car detection unit 24 detects car 2 at the fourth car height, and the processing unit 8 resets the calculated floor position of car 2 to the floor of the fourth car height (the top floor). This makes it possible to reset the floor of the calculated car position to an appropriate floor if the floor of the calculated car position is different from the top floor when car 2 is located at the fourth car height, which is the top floor.

When the first water level detection unit 31 detects a water level of the first water height, the car 2 travels within a travel range below the second upper landing height. Therefore, while the fifth car height is a position between the second upper landing height and the third upper landing height, when the first water level detection unit 31 detects a water level of the first water height, the fifth car detection unit 25 detects the car 2, and the processing unit 8 resets the calculated floor position of the car 2 to the floor of the fifth car height.

As a result, even if the first water level detection unit 31 detects a water level of the first water height and the car 2 travels within a travel range below the second upper landing height, the calculated floor position of the car 2 can be reset to the top floor (the second upper floor between the second upper landing height and the third upper landing height). Therefore, regardless of whether or not the first water level detection unit 31 detects a water level of the first water height, the calculated floor position of the car 2 can be reset to the top floor.

The elevator 1 is not limited to the configuration of the embodiment described above, nor is it limited to the effects described above. Furthermore, the elevator 1 can of course be modified in various ways without departing from the spirit of the present invention. For example, it is of course possible to arbitrarily select one or more of the configurations, methods, etc. related to the various modified examples described below and adopt them in the configurations, methods, etc. related to the embodiment described above.

(A) In the elevator 1 according to the above embodiment, the first water level detection unit 31 is separate from the second water level detection unit 32, and the first water level is higher than the second water level. However, the elevator 1 is not limited to this configuration.

For example, the first water level may be lower than the second water level. Also, for example, the first water level may be the same as the second water level. In such a configuration, the first water level detection unit 31 and the second water level detection unit 32 may be, for example, a common detection unit, or may be, for example, separate detection units.

In a configuration in which the first water level detection unit 31 and the second water level detection unit 32 are a single common detection unit, for example, when the single common detection unit detects the water level, the processing unit 8 causes the car 2 to run in a running range that is equal to or lower than the second upper landing height and equal to or higher than the second lower landing height.

(B) In addition, in the elevator 1 according to the above embodiment, the second water level is lower than the lower end position of the moving cable 9 when the car 2 is located at the first lower landing height. However, the elevator 1 is not limited to such a configuration. For example, the second water level may be higher than the lower end position of the moving cable 9 and lower than the lower end position of the car 2 when the car 2 is located at the first lower landing height.

(C) Furthermore, the elevator 1 according to the above embodiment is configured to include the first to third water level detection units 31 to 33. However, the elevator 1 is not limited to this configuration. For example, the elevator 1 may be configured to include only the first water level detection unit 31, and not the second and third water level detection units 32, 33. For example, the elevator 1 may be configured to include the first and second water level detection units 31, 32, and not the third water level detection unit 33. For example, the elevator 1 may be configured to include the first and third water level detection units 31, 33, and not the second water level detection unit 32.

(D) In addition, in the elevator 1 according to the above embodiment, the third water level is configured to be lower than the position of the first car detection unit 21. However, the elevator 1 is not limited to such a configuration. For example, the third water level may be configured to be the same as the position of the first car detection unit 21. Also, for example, the third water level may be configured to be higher than the position of the first car detection unit 21.

(E) In addition, in the elevator 1 according to the above embodiment, the normal running control executes car descent safety control, and the car descent safety control of the normal running control executes reset control of the calculated car position level (first control) based on detection of car 2 by the second car detection unit 22, deceleration control of car 2 (second control) based on detection of car 2 by the second car detection unit 22, and stop control of car 2 (third control) based on detection of car 2 by the first car detection unit 21. However, the elevator 1 is not limited to such a configuration.

For example, the normal driving control may be configured not to execute the car descent safety control, i.e., not to execute any of the first to third controls. Also, for example, the car descent safety control of the normal driving control may be configured to execute only some of the first to third controls.

(F) In addition, in the elevator 1 according to the above embodiment, the bottom limit travel control executes car descent safety control, and the car descent safety control of the bottom control travel control executes a reset control of the calculated car position level (fourth control) based on the detection of car 2 by the third car detection unit 23, a deceleration control of car 2 based on the detection of car 2 by the third car detection unit 23 (fifth control), and a stop control of car 2 based on the detection of car 2 by the second car detection unit 22 (sixth control). However, the elevator 1 is not limited to such a configuration.

For example, the lower limit travel control may be configured not to execute the car descent safety control, i.e., not to execute any of the above-mentioned fourth to sixth controls. Also, for example, the car descent safety control of the lower limit travel control may be configured to execute only some of the above-mentioned fourth to sixth controls.

(G) In addition, in the elevator 1 according to the above embodiment, the normal running control executes car ascent safety control, and the car ascent safety control of the normal running control executes a reset control of the calculated car position level (seventh control) based on the detection of car 2 by the fourth car detection unit 24, a deceleration control of car 2 based on the detection of car 2 by the fourth car detection unit 24 (eighth control), and a stop control of car 2 based on the detection of car 2 by the sixth car detection unit 26 (ninth control). However, the elevator 1 is not limited to such a configuration.

For example, the normal driving control may be configured not to execute the car ascent safety control, i.e., not to execute any of the seventh to ninth controls. Also, for example, the car ascent safety control of the normal driving control may be configured to execute only some of the seventh to ninth controls.

(H) In addition, in the elevator 1 according to the above embodiment, the upper limit travel control executes car ascent safety control, and the car ascent safety control of the upper control travel control executes a reset control of the calculated car position level (tenth control) based on the detection of car 2 by the fifth car detection unit 25, a deceleration control of car 2 (eleventh control) based on the detection of car 2 by the fifth car detection unit 25, and a stop control of car 2 (twelfth control) based on the detection of car 2 by the fourth car detection unit 24. However, the elevator 1 is not limited to such a configuration.

For example, the upper limit travel control may be configured not to execute the car ascent safety control, i.e., not to execute any of the above-mentioned 10th control to 12th control. Also, for example, the car ascent safety control of the upper limit travel control may be configured to execute only some of the above-mentioned 10th control to 12th control.

(I) Note that, for example, the order of execution of each process, such as operations, procedures, steps, and stages, in the systems, methods, programs, and devices shown in the claims, specifications, and drawings, can be realized in any order, so long as the output of a previous process is not used in a subsequent process. For example, even if "first," "next," etc. are used for convenience in the description, this does not mean that it is necessary to execute them in that order.

1... elevator, 2... cage, 3... cage rope, 4... counterweight, 5... hoist, 5a... sheave, 5b... drive source, 5c... braking unit, 6... cage rail, 7... weight rail, 8... processing unit, 8a... control panel, 8b... acquisition unit, 8c... storage unit, 8d... calculation unit, 8e... control unit, 9... moving cable, 9a... fixed unit, 9b... moving unit, 10... support unit, 11... landing door, 12... landing operation panel, 13... cage operation panel, 14... detected unit, 15... Landing detection unit, 16...Travel detection unit, 21...First cage detection unit, 22...Second cage detection unit, 23...Third cage detection unit, 24...Fourth cage detection unit, 25...Fifth cage detection unit, 26...Sixth cage detection unit, 31...First water level detection unit, 32...Second water level detection unit, 33...Third water level detection unit, X1...Elevator shaft, X2...First upper landing, X3...Second upper landing, X4...Third upper landing, X5...First lower landing, X6...Second lower landing, X7...Third lower landing

Claims (6)

The car travels up and down,
A cage rope connected to the cage;
a counterweight connected to the car rope, the counterweight descending as the car ascends and ascending as the car descends;
a processing unit that runs the car in a running range that is equal to or higher than a first lower platform height, which is a height of the car located at a platform on the lowest floor, and equal to or lower than a first upper platform height, which is a height of the car located at a platform on the highest floor;
a first water level detection unit that detects when the water level in the elevator shaft reaches a first water height;
The first water level is lower than a lower end position of the counterweight when the car is located at the first upper landing level,
The processing unit, when the first water level detection unit detects a water level, runs the car within a running range below a second upper landing height, which is the height of the car located at the landing on the second floor from the top. The processing unit includes a control panel;
The elevator is
A moving cable connecting the car and the control panel;
A second water level detection unit that detects when the water level in the elevator reaches a second water height,
The second water level is lower than a lower end position of the moving cable when the car is located at the first lower landing level,
2. The elevator of claim 1, wherein when the second water level detection unit detects a water level, the processing unit causes the car to run within a running range equal to or greater than a second lower landing height, which is the height of the car located at a landing on the second floor from the bottom. A third water level detector detects when the water level in the elevator reaches a third water height.
The third water level is higher than the first water level and the second water level,
The elevator according to claim 2 , wherein the processing unit stops and pauses travel of the car when the third water level detection unit detects the water level. A first car detection unit is fixed to the elevator shaft and detects that the car is located at a first car height,
The first car height is lower than the first lower landing height,
The processing unit stops the car when the first car detection unit detects the car,
The first cage detection unit outputs a presence or absence of detection of the cage to the processing unit as an electrical signal,
The elevator according to claim 3 , wherein the third water level is lower than a position of the first car detection unit. A plurality of detection targets are fixed to the elevator and disposed at each landing;
a hall detection unit that is fixed to the car and detects the detection target unit when the car is located at each hall;
a second car detection unit that is fixed to the elevator shaft and detects that the car is located at a second car height;
and a third car detection unit that is fixed to the elevator shaft and detects that the car is located at a third car height.
The second car height is a position between the first lower landing height and the second lower landing height,
The third car height is a position between the second lower platform height and a third lower platform height which is a height of the car located at a platform on the third floor from the bottom,
The processing unit calculates a floor position of the car based on the detection of the hall detection unit,
The processing unit resets the floor position of the car to be calculated to the floor of the second car height by the second car detection unit detecting the car,
An elevator as described in any one of claims 2 to 4, wherein when the second water level detection unit detects a water level, the processing unit resets the calculated floor position of the car to the floor of the third car height by the third car detection unit detecting the car. A plurality of detection targets are fixed to the elevator and disposed at each landing;
a hall detection unit that is fixed to the car and detects the detection target unit when the car is located at each of the halls;
a fourth car detection unit that is fixed to the elevator shaft and detects that the car is located at a fourth car height;
A fifth car detection unit is fixed to the elevator shaft and detects that the car is located at a fifth car height.
The fourth car height is a position between the first upper landing height and the second upper landing height,
The fifth car height is a position between the second upper landing height and a third upper landing height, which is a height of the car located at a landing on the third floor from the top,
The processing unit calculates a floor position of the car based on the detection of the hall detection unit,
The processing unit resets the floor position of the car to be calculated to the floor of the fourth car height by the fourth car detection unit detecting the car,
An elevator as described in any one of claims 1 to 4, wherein when the first water level detection unit detects a water level, the processing unit resets the calculated floor position of the car to the floor of the fifth car height by the fifth car detection unit detecting the car.