JP7095034B2 - Elevator door control - Google Patents

Description

Embodiments of the present invention relate to an elevator door control device.

When the elevator car lands on the landing on each floor, the car door engages with the landing door and opens and closes. The door motor, which is the drive source, is installed in the car. The drive of this door motor causes the car door to move in the opening / closing direction, and the landing door follows the car door. Here, a certain amount of control (door closing holding force) is output to the door motor so that the car door does not open due to vibration or the like when the car is moving on each floor.

Japanese Unexamined Patent Publication No. 8-26611

However, when an earthquake occurs and the car shakes, an external force exceeding the above-mentioned controlled amount acts on the door of the car, and the opening and closing operation may be repeated. At that time, if the user is in the car, there is a possibility that a finger or the like may be pinched.

An object to be solved by the present invention is to provide an elevator door control device that prevents the door from moving due to the shaking of the car in the event of an earthquake and ensures the safety of the user.

The elevator door control device according to the embodiment includes an earthquake detector. The elevator door control device includes a door motor for opening and closing the car door, a user detection means for detecting the presence or absence of a user in the car, and earthquake information output from the seismic detector. Based on this, it is determined whether or not an earthquake has been detected, and the use detected by the above-mentioned car operating state and the above-mentioned user detection means is divided into the case where the earthquake is not detected and the case where the earthquake is detected. It is provided with a control means for controlling the door closing holding force according to the riding state of the person .

FIG. 1 is a diagram showing a configuration of an elevator system according to the first embodiment. FIG. 2 is a diagram showing a configuration of a portion around an entrance / exit in a car provided in the elevator system. FIG. 3 is a schematic view of the inside of the car when viewed from above. FIG. 4 is a schematic view of the inside of the car when viewed from above. FIG. 5 is a diagram showing an example of the door control amount in the first embodiment. FIG. 6 is a flowchart showing the operation of the door control device according to the first embodiment. FIG. 7 is a flowchart showing the details of the first door control executed in step S15 of FIG. FIG. 8 is a flowchart showing the details of the second door control executed in step S17 of FIG. FIG. 9 is a flowchart showing the details of the third door control executed in step S21 of FIG. FIG. 10 is a flowchart showing the details of the fourth door control executed in step S23 of FIG. FIG. 11 is a diagram showing a configuration of an elevator system according to a second embodiment. FIG. 12 is a flowchart showing the operation of the door control device according to the third embodiment. FIG. 13 is a diagram showing an example of the door control amount in the third embodiment.

Hereinafter, embodiments will be described with reference to the drawings.
The disclosure is merely an example, and the invention is not limited by the contents described in the following embodiments. Modifications that can be easily conceived by those skilled in the art are naturally included in the scope of disclosure. In order to clarify the explanation, in the drawings, the size, shape, etc. of each part may be changed with respect to the actual embodiment and represented schematically. In a plurality of drawings, the corresponding elements may be given the same reference numerals and detailed description may be omitted.

(First Embodiment)
FIG. 1 is a diagram showing a configuration of an elevator system according to the first embodiment. The elevator system in this embodiment includes an elevator control device 10, an earthquake detector 11, a door control device 20, and a car 30.

The elevator control device 10 is composed of a computer and is installed in a machine room or a hoistway (not shown) to control the entire elevator including the operation control of the car 30. The elevator control device 10 outputs operation information indicating the operating state (during traveling, landing, etc.) of the car 30 to the door control device 20.

The seismic detector 11 is installed, for example, in a pit portion of a hoistway (not shown), a machine room, or the like. The earthquake detector 11 detects that an earthquake has occurred and outputs an earthquake detection signal according to the earthquake level to the elevator control device 10.

The elevator control device 10 controls the operation of the car 30 based on the earthquake detection signal output from the earthquake detector 11. Specifically, the elevator control device 10 switches to the seismic control operation mode, moves the car 30 to the nearest floor, opens the door there, and performs control such as waiting. Further, the elevator control device 10 outputs earthquake information indicating that an earthquake has occurred to the door control device 20.

The door control device 20 is composed of a computer and is installed in the car 30 to control the opening / closing operation of the car door 31. In the present embodiment, the door control device 20 is provided with a user detection unit 21, a control unit 22, and a drive unit 23.

The user detection unit 21 detects the presence or absence of a user in the car 30. Specifically, the user detection unit 21 has a function of analyzing an image of a camera 34 installed in the car 30, and detects the presence or absence of a user in the car 30 based on the analysis result of the above image. Then, the user detection information indicating the detection result is output to the control unit 22. The function of the user detection unit 21 may be provided in the elevator control device 10, and the elevator control device 10 may be configured to detect the presence or absence of a user in the car 30.

When the car 30 lands on an arbitrary floor, the control unit 22 outputs a motor drive signal to the drive unit 23 to drive the door motor 32. By driving the door motor 32, the car door 31 moves in the door opening direction or the door closing direction via the door opening / closing mechanism 33. The drive unit 23 is a driver for driving the door motor 32. Further, the control unit 22 has a function of performing door control based on the driving information of the car 30 and the user detection information output from the user detection unit 21 when an earthquake is detected by the earthquake detector 11. Have.

Specifically, when an earthquake is detected, the control unit 22 determines whether the car 30 is landing or running based on the driving information of the car 30, and also uses the user detection information. Based on this, it is determined whether or not the user is in the vicinity of the door of the car 30. "During landing" means a state immediately after the car 30 has stopped on an arbitrary floor. At this time, the car door 31 is still closed. "Running" means that the car 30 is moving on each floor.

Here, when the car 30 is on the floor and the user is in the vicinity of the door, the control unit 22 controls the door closing holding force of the door motor 32 according to the earthquake level. Further, when the user is on a vehicle other than the vicinity of the door, the control unit 22 raises the door closing holding force of the door motor 32 above the standard value. On the other hand, when the car 30 is running and the user is in the vicinity of the door, the control unit 22 controls the door closing holding force of the door motor 32 according to the level of the earthquake, and the level of the earthquake. The door closing holding force is increased compared to when the car 30 is on the floor. When the user is on a vehicle other than the vicinity of the door, the control unit 22 raises the door closing holding force of the door motor 32 above the standard value.

The car 30 is provided with a car door 31, a door motor 32, and a door opening / closing mechanism 33. The car door 31 is composed of, for example, two door panels, and is provided at the entrance / exit of the car 30 so as to be openable / closable. If the opening / closing method of the car door 31 (also simply referred to as a door method) is a central double door method, the two door panels constituting the car door 31 open and close in opposite directions. In the single-door system, the two door panels constituting the car door 31 open and close in the same direction.

The landing door 40 installed at the entrance / exit of the landing has the same door system as the car door 31, and moves at the same time following the opening / closing operation of the car door 31. The door opening / closing mechanism 33 includes, for example, a plurality of pulleys and a belt wound around these pulleys, and converts the rotational force of the door motor 32 into a force required for opening / closing the door.

In the figure, P1 is the motor output, P2 is the running resistance (force that hinders the door opening operation such as frictional force), and P3 is the door closing holding force (force required to hold the door closing state). The motor output P1 is determined by the rotation speed and torque of the door motor 32. Here, it is assumed that all of the motor output P1 is transmitted to the car door 31. The motor output P1 can be expressed by the following equation (1). The running resistance P2 is measured in advance for each floor at the time of installation.

P1 = P2 + P3
= P2 + (M × a) …… (1)
M is the weight of the door, including the weight of the car door 31 and the weight of the landing door 40. a is an acceleration.

In a general door control method, the door closing holding force P3 is controlled by the weight of the door while the car 30 is in operation, regardless of the presence or absence of a user. That is, the door closed state is maintained with a constant force regardless of whether the user is in the car 30 or not. Therefore, the power consumption is high, and if the operation is continued for a long time, the door motor 32 may generate heat and deteriorate. In the present embodiment, the car 30 controls the door closing holding force P3 while the car is on the floor and while the car is running by detecting the user from the image of the camera 34 installed in the car 30.

FIG. 2 is a diagram showing a configuration of a portion around the doorway in the car 30.
A car door 31 is provided at the entrance and exit of the car 30 so as to be openable and closable. In the example of FIG. 2, a double door double door type car door 31 is shown, and the two door panels 31a and 31b constituting the car door 31 open and close in opposite directions along the frontage direction (horizontal direction). .. The "frontage" is the same as the entrance / exit of the car 30.

Front pillars 41a and 41b are provided on both sides of the doorway of the car 30, and surround the doorway of the car 30 together with the curtain plate 30a. The "front pillar" is also referred to as an entrance / exit pillar or an entrance / exit frame, and is generally provided with a door pocket for accommodating the car door 31 on the back side. In the example of FIG. 2, when the car door 31 is opened, one door panel 31a is housed in a door bag 42a provided on the back side of the front pillar 41a, and the other door panel 31b is provided on the back side of the front pillar 41b. It is stored in the door bag 42b.

A display 43, an operation panel 45 on which a destination floor button 44 and the like are arranged, and a speaker 46 are installed on one or both of the front pillars 41a and 41b. In the example of FIG. 2, the speaker 46 is installed on the front pillar 41a, the display 43 and the operation panel 45 are installed on the front pillar 41b.

A camera 34 is installed in the center of the curtain plate 30a above the doorway of the car 30. The camera 34 is a small surveillance camera such as an in-vehicle camera, has a wide-angle lens or a fisheye lens, and can continuously capture images of several frames (for example, 30 frames / second) per second. The camera 34 takes a picture of the entire inside of the car including the vicinity of the car door 31, and outputs the taken image to the user detection unit 21. It should be noted that the camera 34 is not limited to the mode provided on the curtain plate 30a as shown in FIG. 2, as long as the camera 34 includes the vicinity of the car door 31 and can photograph the entire inside of the car. For example, it may be provided on the ceiling of the car 30 like a surveillance camera.

3 and 4 are schematic views of the inside of the car 30 when viewed from above. The door opening / closing direction of the car door 31 is the X-axis direction, and the direction orthogonal to the door opening / closing direction is the Y-axis direction. Q1 to Q3 in the figure represent users.

The detection area E1 is set with reference to the position of the car door 31 on the captured image of the camera 34. The detection area E1 has a size of L1 in the Y-axis direction from the car door 31. The size in the X-axis direction is W0, which is the same as the frontage width of the car 30. As shown in FIG. 3, when the users Q1 and Q2 are not detected in the detection area E1, it is determined that the user is in a place away from the car door 31. On the other hand, as shown in FIG. 4, when the user Q3 is detected in the detection area E1, it is determined that the user is in the vicinity of the car door 31.

The range of the detection area E1 is set in the vicinity of the car door 31, and the size of the detection area E1 may be freely changed. For example, it is preferable that the size of L1 in the Y-axis direction is set within half of the car door 31 side in the Y-axis direction of the car 30. For example, when the capacity of the car 30 is large, the size of L1 in the Y-axis direction may be the size of the width of several passengers. The value of the detection area E1 is stored in, for example, a storage unit (not shown) in the door control device 20 or the elevator control device 10.

FIG. 5 is a diagram showing an example of the door control amount.
The "door control amount" here means the strength of the door closing holding force (P3 shown in FIG. 1). The door closing holding force increases in the order of "a", "b", "c", and "d". Specifically, a: 50N, b: 100N (standard value), c: 150N, d: 200N (N is Newton). "Earthquake level" is the magnitude of the shaking of an earthquake. The shaking of the earthquake increases in the order of "G1", "G2", and "G3". For example, "G1" has a seismic intensity of 1 to 3, "G2" has a seismic intensity of 4 to 5, and "G3" has a seismic intensity of 6 to 7.

When the earthquake level is "0", the door closing holding force is set according to the riding condition of the user regardless of whether the vehicle is landing or traveling. If the user is not on board, or if the user is on board but is not near the door, the risk is low, so the door closing holding force can be kept lower than the standard value (door). Closed holding force = "a"). If the user is in the vicinity of the door, the user's hand may be caught, so it is preferable to close it with a force of at least the standard value (door closing holding force = "b"). ).

On the other hand, when an earthquake occurs, the door closing holding force is adjusted separately for landing and running. In order to keep the door fixed during landing, it is preferable to increase the door closing holding force when the earthquake level is high. While driving, it is necessary to increase the door closing holding force to prevent the door from opening, regardless of whether or not the user is on board. Specifically, the door closing holding force is adjusted under the following conditions.

(1) When the car 30 is on the floor and the user is not on board When the earthquake level is low, the door closing holding force is lowered below the standard value b.
When the earthquake level is "G1", the door closing holding force = "a"
When the earthquake levels are "G2" and "G3", the door closing holding force = "b"
(2) When the car 30 is on the floor and the user is on a vehicle other than near the door. The door closing holding force is gradually increased from the standard value b according to the earthquake level.
When the earthquake levels are "G1" and "G2", the door closing holding force = "b"
When the earthquake level is "G3", the door closing holding force = "c"
(3) When the car 30 is on the floor and the user is in the vicinity of the door The door closing holding force is gradually increased more than the above (2) according to the earthquake level.
When the earthquake levels are "G1" and "G2", the door closing holding force = "c"
When the earthquake level is "G3", the door closing holding force = "d"
(4) When the car 30 is running and the user is not in the car, the door closing holding force is increased compared to when the car is on the floor.
When the earthquake level is "G1", the door closing holding force = "b"
When the earthquake levels are "G2" and "G3", the door closing holding force = "c"
(5) When the car 30 is running and the user is in a place other than near the door Same as (4) above.
When the earthquake level is "G1", the door closing holding force = "b"
When the earthquake levels are "G2" and "G3", the door closing holding force = "c"
(6) When the car 30 is running and the user is in the vicinity of the door, the door closing holding force is further increased than in (4) and (5) above.
When the earthquake level is "G1", the door closing holding force = "c"
When the earthquake levels are "G2" and "G3", the door closing holding force = "d"

If there is no earthquake, the setting will be lower than when the earthquake occurred. Specifically, the door closing holding force is adjusted under the following conditions.
・ When the car 30 is on the floor / running and the user is not in the car Door closing holding force = "a"
・ When the car 30 is on the floor / running and the user is on a vehicle other than near the door Door closing holding force = "a"
・ When the car 30 is on the floor / running and the user is in the vicinity of the door Door closing holding force = "b"
That is, when an earthquake has not occurred, the door closing holding force differs depending on whether or not the user is in the vicinity of the door.

Note that FIG. 5 is an example, and the value of the door closing holding force can be arbitrarily set according to the weight of the door, the amount of shaking of the car 30 at the time of an earthquake, and the like. Further, the seismic level may be divided into three or more, and the value of the door closing holding force may be set finely for each level.

Next, the operation of the first embodiment will be described.
FIG. 6 is a flowchart showing the operation of the door control device 20 in the first embodiment. 7 to 10 are flowcharts showing details of the first door control to the fourth door control shown in FIG. 6, respectively. Hereinafter, the control of the door closing holding force for holding the door closing of the car door 31 will be described separately for the time of an earthquake and the normal time.

(A) When an earthquake occurs When an earthquake occurs, earthquake information indicating the magnitude of the shaking of the earthquake is given from the earthquake detector 11 to the door control device 20 via the elevator control device 10. When the control unit 22 provided in the door control device 20 detects that an earthquake has occurred based on the earthquake information (Yes in step S11), the control unit 22 acquires the operation information of the car 30 from the elevator control device 10 (step S12). It is determined whether or not the car 30 is on the floor or running (step S13).

When the car 30 is on the floor (Yes in step S13), the control unit 22 activates the user detection unit 21 to execute the user detection process (step S14). Regardless of the operating state of the car 30, the user detection unit 21 may always detect the presence or absence of a user. The control unit 22 executes the first door control in response to the result of the user detection process, and adjusts the door closing holding force for holding the door closing of the car door 31 (step S15).

Specifically, as shown in FIG. 7, when the user is not in the car 30 (No in step S31), the control unit 22 determines that the risk is low and applies the door closing holding force. It is lowered to drive the door motor 32 in the door closing direction (step S33). However, if the earthquake level is high even during landing, the car door 31 needs to be fixed, so that the door closing holding force is strengthened. In the example of FIG. 5, when the seismic level is “G1”, the door closing holding force is lower than the standard value b. When the seismic level is "G2" or higher, the door closing holding force is switched to the standard value b (see (1) in the figure).

If the user is on a vehicle other than the detection area E1 of the vehicle 30, that is, if the user is on a vehicle other than the vicinity of the car door 31 (No in step S32), the control unit 22 is in danger. It is determined that the door is slightly high, and the door closing holding force is increased to the standard value b or more to drive the door motor 32 in the door closing direction (step S34). In this case, the door closing holding force is gradually increased according to the earthquake level. In the example of FIG. 5, when the earthquake levels are “G1” and “G2”, the door closing holding force = “b”. When the earthquake level is "G3", the door closing holding force can be switched to "c" (see (2) in the figure).

Further, if the user is in the detection area E1 of the car 30, that is, if the user is in the vicinity of the car door 31 (Yes in step S32), the control unit 22 is in danger. The door motor 32 is driven in the door closing direction by further increasing the door closing holding force as compared with the case when the user is not in the vicinity of the door (step S35). At that time, the door closing holding force is gradually increased according to the earthquake level. In the example of FIG. 5, when the seismic levels G1 and G2, the door closing holding force = "c". When the earthquake level is G3, the door closing holding force can be switched to "d" (see (3) in the figure).

The door closing holding force is obtained from, for example, the weight of the car. "Increasing the door closing holding force above the standard value" means increasing the torque required to maintain the door closing state more than usual. As a result, the car door 31 is closed with a strong force, and even if an external force such as the shaking of an earthquake is applied to the car door 31, it cannot be easily opened.

"Reducing the door closing holding force below the standard value" means lowering the torque required to maintain the door closing state than usual. This reduces the power required to keep the door closed. Therefore, when there is no danger to the user, by lowering the door closing holding force to "a", deterioration due to the temperature rise of the door motor 32 can be prevented.

Returning to FIG. 6, when the car 30 is running (No in step S13), the control unit 22 activates the user detection unit 21 to execute the user detection process (step S16). , The second door control is executed in response to the result of the user detection process (step S17). In the second door control, the door closing holding force is increased as compared with the time when the car 30 is on the floor, and the car door 31 is closed strongly.

That is, as shown in FIG. 8, when the user is not in the car 30 (No in step S41), the control unit 22 sets the door closing holding force from the standard value b according to the earthquake level. The door motor 32 is driven in the door closing direction by raising the door stepwise (step S43). In the example of FIG. 5, when the seismic level is “G1”, the door closing holding force = “b”. When the earthquake levels are "G2" and "G3", the door closing holding force can be switched to "c" (see (4) in the figure).

If the user is on a vehicle other than the detection area E1 of the vehicle 30, that is, if the user is on a vehicle other than the vicinity of the vehicle door 31 (No in step S42), the control unit 22 does not have a vehicle. In the same manner as in the case of, the door closing holding force is gradually increased from the standard value b according to the earthquake level to drive the door motor 32 in the door closing direction (step S44). In the example of FIG. 5, when the seismic level is “G1”, the door closing holding force = “b”. When the earthquake levels are "G2" and "G3", the door closing holding force can be switched to "c" (see (5) in the figure).

Here, if the user is in the detection area E1 of the car 30, that is, if the user is in the vicinity of the car door 31 (Yes in step S42), the control unit 22 is dangerous. It is determined that the door closing force is high, and the door closing holding force is further increased to drive the door motor 32 in the door closing direction (step S45). In the example of FIG. 5, when the earthquake level is “G1”, the door closing holding force = “c”. When the earthquake levels are "G2" and "G3", the door closing holding force can be switched to "d" (see (6) in the figure).

(B) Normal time When an earthquake does not occur, that is, in normal time, the following processing is executed.
That is, the control unit 22 provided in the door control device 20 acquires the operation information of the car 30 from the elevator control device 10 (step S18), and whether the car 30 is on the floor on any floor or on each floor. It is determined whether or not the vehicle is traveling in between (step S19).

When the car 30 is on the floor (Yes in step S19), the control unit 22 activates the user detection unit 21 to execute the user detection process (step S20). Regardless of the operating state of the car 30, the user detection unit 21 may always detect the presence or absence of a user. The control unit 22 executes the third door control in response to the result of the user detection process, and adjusts the door closing holding force for holding the door closing of the car door 31 (step S21).

Specifically, as shown in FIG. 9, when the user is not in the car 30 (No in step S51), the control unit 22 determines that the risk is low and determines the door closing holding force. The door motor 32 is driven in the door closing direction by lowering the standard value b (step S53). Similarly, if the user is on a vehicle other than the detection area E1 of the vehicle 30, that is, if the user is on a vehicle other than the vicinity of the car door 31 (No in step S52), the control unit 22 is dangerous. It is determined that the property is low, the door closing holding force is lowered from the standard value b, and the door motor 32 is driven in the door closing direction (step S54). In the example of FIG. 5, the door closing holding force = "a" is set in the case of "no boarding" and "no boarding near the door".

Further, if the user is in the detection area E1 of the car 30, that is, if the user is in the vicinity of the car door 31 (Yes in step S52), the control unit 22 is in danger. It is determined that the door is slightly higher, and the door closing holding force is increased above "a" to drive the door motor 32 in the door closing direction (step S55). In the example of FIG. 5, when "there is a ride near the door", the door closing holding force = "b" is set.

Since the car door 31 is closed with a strong force by increasing the door closing holding force, it can be easily opened even if there is no shaking of the earthquake or an external force such as a user's mischief is applied to the car door 31. Will not be.

In particular, when the car door 31 is a two-door single-door system, the car door 31 may open if the user leans against the overlapping portion between one door panel and the other door panel. In such a case, if the door closing holding force is increased, it is possible to prevent the door from opening due to the user leaning on it.

Returning to FIG. 6, when the car 30 is running (No in step S19), the control unit 22 activates the user detection unit 21 to execute the user detection process (step S22). , The fourth door control is executed in response to the result of the user detection process (step S23). The fourth door control is the same as the third door control.

That is, as shown in FIG. 10, when the user is not in the car 30 (No in step S61), the control unit 22 determines that the risk is low, and standardizes the door closing holding force. The door motor 32 is driven in the door closing direction by lowering the value b (step S63). Similarly, if the user is on a vehicle other than the detection area E1 of the vehicle 30, that is, if the user is on a vehicle other than the vicinity of the car door 31 (No in step S52), the control unit 22 is dangerous. It is determined that the property is low, the door closing holding force is lowered from the standard value b, and the door motor 32 is driven in the door closing direction (step S64). In the example of FIG. 5, the door closing holding force = "a" is set in the case of "no boarding" and "no boarding near the door".

Further, if the user is in the detection area E1 of the car 30, that is, if the user is in the vicinity of the car door 31 (Yes in step S62), the control unit 22 is in danger. It is determined that the door is slightly higher, and the door closing holding force is increased above "a" to drive the door motor 32 in the door closing direction (step S65). In the example of FIG. 5, when "there is a ride near the door", the door closing holding force = "b" is set.

As described above, according to the first embodiment, when an earthquake occurs, it is divided into landing and running, and the door closing holding force is adjusted according to the riding condition of the user, thereby causing an earthquake. The safety of the user can be ensured by preventing the car door 31 from opening due to the shaking of the car. In particular, by increasing the door closing holding force step by step according to the earthquake level, it is possible to reliably prevent the door from opening when a large shake occurs and ensure the safety of the user. On the other hand, when the user is not on board, by lowering the door closing holding force, it is possible to suppress power consumption and prevent deterioration due to the temperature rise of the door motor 32.

Further, even in normal times, by adjusting the door closing holding force according to the riding condition of the user, it is possible to prevent the door from opening due to mischief of the user or the like. On the other hand, when the user is not on board, by lowering the door closing holding force, it is possible to suppress power consumption and prevent deterioration due to the temperature rise of the door motor 32.

In the first embodiment, the door closing holding force is switched depending on whether or not the user is in the vicinity of the door regardless of whether the vehicle is on the floor or while the vehicle is running. Since the safety of the user is required more than during landing, the door closing holding force may be increased a little. That is, in the example of FIG. 5, the door closing holding force = "b" when there is no ride in the vicinity of the door during traveling, and the door closing holding force = "c" when there is a ride in the vicinity of the door during traveling.

(Second embodiment)
Next, the second embodiment will be described.
FIG. 11 is a diagram showing a configuration of an elevator system according to a second embodiment. The same parts as those in FIG. 1 in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In the second embodiment, the three-axis accelerometer 35 is installed in the car 30. The acceleration sensor 35 detects acceleration in the xyz direction. At the time of an earthquake, the shaking of the car 30 varies depending on the structure of the building and the position of the car 30, and may be larger than the earthquake level detected by the earthquake detector 11. Therefore, in the second embodiment, the acceleration sensor 35 is used to detect the amount of shaking of the car 30 when an earthquake occurs, and the amount of shaking is reflected in the door control.

Specifically, in the first door control described with reference to FIG. 7, the control unit 22 determines the amount of shaking of the car 30 in the horizontal direction (xy direction) based on the car shaking information output from the acceleration sensor 35. Judge whether or not it is the above. If it is equal to or higher than the predetermined value, the control unit 22 determines that the car 30 is shaking more than the earthquake level detected by the earthquake detector 11, and raises the door closing holding force by at least one step. The door motor 32 is driven in the door closing direction. For example, when the door closing holding force = "c" is set at the earthquake level G1, the door closing holding force is changed to "d". As a result, when the car 30 is shaking more than the earthquake level, the door closing holding force can be further strengthened to prevent the door opening.

The same applies to the second door control described with reference to FIG. 8, and when the amount of shaking of the car 30 in the horizontal direction (xy direction) is equal to or more than a certain value, the control unit 22 applies at least the door closing holding force. Raise it by one step to drive the door motor 32 in the door closing direction.

As described above, according to the second embodiment, by determining the door closing holding force in consideration of the amount of shaking of the car 30 when an earthquake occurs, for example, the car 30 is on the top floor or near the top floor. It is possible to ensure the safety of the user by strengthening the door closure when the vehicle is shaking greatly with the building while driving.

The shaking of the car 30 is not limited to an earthquake, but may be greatly shaken together with the building due to, for example, a strong wind. Therefore, when the amount of shaking of the car 30 is equal to or more than a certain value in normal times, it is preferable to raise the door closing holding force above the reference value a and drive the door motor 32 in the door closing direction.

(Third embodiment)
Next, a third embodiment will be described.
Normally, when the car 30 lands on an arbitrary floor and is fully opened, a constant force is applied in the door opening direction of the car door 31 to maintain the door open state. The force at this time is called a "door opening holding force" and acts in the direction opposite to the door closing holding force P3 shown in FIG. Here, when an earthquake occurs, the car door 31 may move in the door closing direction due to the shaking at that time and may hit a user getting off the car 30. Therefore, in the third embodiment, when an earthquake occurs during the door opening, the door opening holding force is controlled according to the riding condition of the user.

FIG. 12 is a flowchart showing the operation of the door control device 20 in the third embodiment.
It is assumed that the car 30 is currently being opened on any floor and the door open state is maintained by the above-mentioned door open holding force (step S71). At this time, the door opening holding force is a standard value ka, and the time is a fixed time ta.

Here, when an earthquake occurs while the door is open, earthquake information indicating the magnitude of the shaking of the earthquake is given from the earthquake detector 11 to the door control device 20 via the elevator control device 10. When the control unit 22 provided in the door control device 20 detects that an earthquake has occurred based on the earthquake information (Yes in step S72), the control unit 22 executes the following processing.

That is, first, the control unit 22 activates the user detection unit 21 to execute the user detection process (step S73). As a result of the user detection process, when the user is on board including the vicinity of the door of the car 30 (Yes in step S74), the control unit 22 extends the door opening time and extends the door opening time (step S75). The door opening holding force is increased to drive the door motor 32 in the door opening direction (step S76).

"Extending the door opening time" means making the time for holding the door opening state (door opening waiting time) longer than the preset time ta. "Increasing the door opening holding force" means increasing it above the preset standard value ka.

The opening time and the opening holding force can be set arbitrarily. Further, for example, as shown in FIG. 13, the door opening time and the door opening holding force may be changed stepwise according to the seismic level. In the example of FIG. 13, when the user is on board, the door opening time increases in order from ta to tb, tk, and td as the earthquake level rises, and the door opening holding force increases from ka to kb, kc, kd. It is shown that it goes up in order.

On the other hand, if an earthquake is not detected while the door is open (No in step S72), or if the user is not in the car 30 (No in step S74), the control unit 22 moves to the door. The normal door closing control is performed by setting the opening time to ta and the door opening holding force to ka (step S77).

As described above, according to the third embodiment, when an earthquake occurs during door opening, the door opening time and the door opening holding force are adjusted according to the riding condition of the user. Therefore, when the user is on board, the car door 31 is kept open so that the car door 31 does not move due to the shaking of the earthquake, and the door opening time is extended more than usual to make the user safe. You can get off at.

According to at least one embodiment described above, it is possible to provide an elevator door control device that prevents the door from moving due to the shaking of the car in the event of an earthquake and ensures the safety of the user.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 ... Elevator control device, 11 ... Earthquake detector, 20 ... Door control device, 21 ... User detection unit, 22 ... Control unit, 23 ... Drive unit, 30 ... Car, 31 ... Car door, 32 ... Door motor, 33 ... door opening / closing mechanism, 34 ... camera, 35 ... accelerometer, 40 ... landing door.

Claims (9)

In elevator door controls equipped with seismic detectors
A door motor for opening and closing the car door,
User detection means for detecting the presence or absence of users in the above car, and
Based on the earthquake information output from the earthquake detector, it is determined whether or not an earthquake has been detected, and the operating status of the car is divided into cases where an earthquake is not detected and cases where an earthquake is detected. An elevator door control device comprising the control means for controlling the door closing holding force according to the riding state of the user detected by the user detection means . The above control means
Claim 1 is characterized in that when the car is on the floor and the user is in the car, the door closing holding force of the door motor is controlled according to the level of the earthquake. Elevator door controller described. The above control means
The second aspect of claim 2, wherein when the user is in the vicinity of the door, the door closing holding force of the door motor is increased more than when the user is in a place other than the vicinity of the door. Elevator door control device. The above control means
The elevator according to claim 1, wherein when the car is running, the door closing holding force of the door motor is controlled according to the level of the earthquake regardless of whether or not the user is on board. Door control device. The above control means
The fourth aspect of claim 4, wherein when the user is in the vicinity of the door, the door closing holding force of the door motor is increased more than when the user is in a place other than the vicinity of the door. Elevator door control device. Equipped with an acceleration sensor that detects the shaking of the above car
The above control means
The elevator door control device according to claim 1, wherein the door closing holding force of the door motor is controlled in consideration of the magnitude of the shaking of the car detected by the acceleration sensor. The above control means
The sixth aspect of claim 6, wherein the door closing holding force of the door motor is increased above the reference value when the shaking of the car above a certain value is detected even in the state where the earthquake is not detected. Elevator door control device. The above control means
A claim characterized by controlling the door opening holding force of the door motor according to the presence or absence of the user's boarding when the earthquake is detected while the car is open on any floor. Item 1. The elevator door control device according to item 1. The above control means
The elevator according to claim 8, wherein when the user is in the car, the door opening time is extended and the door opening holding force of the door motor is increased above the reference value. Door control device.

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