Elevator Equipment

Abstract

This elevator device comprises a door (11), a switch (21), a measurement unit (22), a measurement unit (27), and a determination unit (34). The measurement unit (22) emits a laser from above along an end surface of the door (11) disposed in a first position. The measurement unit (27) emits a laser from below along the end surface of the door (11) disposed in the first position. When it is detected by the switch (21) that the door (11) has reached the first position, the determination unit (34) determines whether a foreign body is caught in the door (11) on the basis of the distance measured by the measurement unit (22) and the distance measured by the measurement unit (27).

Description

[Technical field]

[0001] The present disclosure relates to elevator systems. [Background technology]

[0002] Patent Document 1 describes an elevator device. The elevator device described in Patent Document 1 includes a safety device. The safety device includes a light emitter and a light receiver. For example, the light emitter is provided at a threshold of the car. The light receiver is provided at a door hanger of the car. The light receiver receives light emitted from the light emitter. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2014-40292 Summary of the Invention [Problem to be solved by the invention]

[0004] In the elevator device described in Patent Document 1, when a string is caught in the door, the string blocks the light from the light emitter. This prevents the light receiver from receiving the light from the light emitter, and it detects that the string is caught in the door. However, in the elevator device described in Patent Document 1, the light receiver must be precisely installed in accordance with the position of the light from the light emitter. This causes a problem in that it takes time and effort to adjust the light emitter and the light receiver.

[0005] The present disclosure has been made to solve the above-mentioned problems. An object of the present disclosure is to provide an elevator device that can detect a foreign object caught in a door and can easily perform adjustment for the detection. [Means for solving the problem]

[0006] The elevator device of the present disclosure comprises a door provided on a car, a first detection device that detects that the door moving in a closing direction has reached a first position, a first measuring device that irradiates a laser from above along the edge face of the door positioned at the first position and measures the distance to an object hit by the laser, a second measuring device that irradiates a laser from below along the edge face of the door positioned at the first position and measures the distance to the object hit by the laser, and a determination unit that, when the first detection device detects that the door has reached the first position, determines whether or not there is a foreign object caught in the door based on the distance measured by the first measuring device and the distance measured by the second measuring device.

[0007] The elevator apparatus of the present disclosure includes a door provided on a car, a first detection device that detects when the door moving in a closing direction has reached a first position, a first measuring device that irradiates a laser along an end face of the door positioned at the first position and measures the distance to an object hit by the laser, and a determination unit that, when the first detection device detects that the door has reached the first position, determines whether or not there is a foreign object caught in the door based on the distance measured by the first measuring device. Effect of the Invention

[0008] With the elevator device according to the present disclosure, it is possible to detect a foreign object caught in the door, and adjustments for the detection can be easily made. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram illustrating an example of an elevator device in a first embodiment. [Diagram 2] This is a view of the front part of the car as seen from the landing side. [Diagram 3] 3 is a view of the front part of the car as viewed from the direction A shown in FIG. 2. [Figure 4] FIG. 2 is a diagram for explaining the function of the elevator device. [Diagram 5] 4 is a flowchart showing an example of the operation of the elevator device in the first embodiment. [Figure 6] FIG. 11 is a diagram showing another example of an elevator device. [Figure 7] FIG. 11 is a diagram showing another example of an elevator device. [Figure 8] FIG. 11 is a diagram showing another example of an elevator device. [Figure 9] FIG. 2 is a diagram illustrating an example of hardware resources of a control device. [Figure 10] FIG. 11 is a diagram illustrating another example of hardware resources of a control device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, a detailed description will be given with reference to the drawings. Duplicate descriptions will be appropriately simplified or omitted. In each drawing, the same reference numerals indicate the same or corresponding parts.

[0011] Embodiment 1 FIG. 1 is a diagram showing an example of an elevator apparatus in a first embodiment. The elevator apparatus shown in FIG. 1 includes a car 1 and a counterweight 2. The car 1 moves up and down in a hoistway 3. The car 1 and the counterweight 2 are suspended from the hoistway 3 by a rope 4. The counterweight 2 moves up and down in the hoistway 3 in a direction opposite to the direction in which the car 1 moves. FIG. 1 shows an elevator apparatus of a 1:1 roping system as an example.

[0012] The rope 4 is wound around a hoisting machine 5. The hoisting machine 5 drives the car 1. The control device 6 controls the hoisting machine 5. That is, the movement of the car 1 is controlled by the control device 6. The control device 6 also controls the equipment provided in the car 1. FIG. 1 shows an example in which the hoisting machine 5 and the control device 6 are provided in a machine room 7 above the hoistway 3. The hoisting machine 5 and the control device 6 may be provided in the hoistway 3. The hoisting machine 5 may be provided at the top of the hoistway 3, or in a pit in the hoistway 3.

[0013] Fig. 1 shows a state in which a car 1 is stopped at a certain landing 8. Fig. 2 is a diagram of the front part of the car 1 as viewed from the landing 8 side. Fig. 3 is a diagram of the front part of the car 1 as viewed from the direction A shown in Fig. 2. Fig. 4 is a diagram for explaining the function of the elevator device.

[0014] The car 1 includes a door 11. The door 11 includes a door panel 12, a hanger 13, a roller 14, and a cam 15. The car 1 also includes a hanger case 16, a rail 17, a sill 18, a pillar 19, an electric motor 20, a switch 21, and a measuring device 22.

[0015] The door panel 12 opens and closes an entrance formed in the car 1. Hereinafter, the entrance formed in the car 1 will also be referred to as a car entrance. The hanger 13 is provided on an upper portion of the door panel 12 so as to extend upward from the door panel 12. The roller 14 is rotatably provided on the hanger 13. The cam 15 is provided on an upper portion of the hanger 13 so as to protrude upward from the hanger 13.

[0016] The hanger case 16 is provided on a member that forms the car compartment. The hanger case 16 is disposed above the car entrance. The hanger case 16 is an example of a support device that supports the door 11 and the like. The door 11, the rail 17, the switch 21, and the measuring device 22 are supported by the hanger case 16.

[0017] The rail 17 is provided on the hanger case 16. The rail 17 is arranged horizontally above the car entrance. The rollers 14 are placed on the upper surface of the rail 17. This allows the door 11 to be hung from the rail 17. The rollers 14 roll on the upper surface of the rail 17 to guide the movement of the door 11. The threshold 18 is arranged horizontally below the door 11. The threshold 18 guides the movement of the lower end of the door 11.

[0018] 2 and 3 show an example in which the car 1 is equipped with two doors 11. In the example shown in Fig. 2 and 3, the two doors 11 move in the same direction when opening and closing. Specifically, in the example shown in Fig. 2, the door 11 opens by moving to the left and closes by moving to the right. Hereinafter, the direction in which the door 11 opens is also referred to as the opening direction. The direction in which the door 11 closes is also referred to as the closing direction.

[0019] In the example shown in Fig. 2, the right door 11 is also called the high-speed door, and the left door 11 is also called the low-speed door. The end face 11a of the right door 11 faces the direction of travel when the door 11 moves in the closing direction, and is the end face that is located at the front of the door panel 12. The end face 11a faces a pillar 19. The pillar 19 is one of the members that form the car entrance / exit. When getting on and off the car 1, passengers pass between the end face 11a and the pillar 19.

[0020] The electric motor 20 generates a driving force for opening and closing the door 11 .

[0021] The switch 21 is provided on the hanger case 16. The switch 21 is switched on and off by the cam 15. For example, if the distance between the end face 11a and the pillar 19 is equal to or less than the distance L1, the switch 21 is turned on. If the distance between the end face 11a and the pillar 19 is greater than the distance L1, the switch 21 is turned off. The distance L1 is set in advance. As an example, the distance L1 is 9 mm. In the following, the position of the door 11 where the distance between the end face 11a and the pillar 19 is the distance L1 is also referred to as the first position.

[0022] The switch 21 is an example of a detection device for detecting that the door 11 moving in the closing direction has reached the first position. That is, when the door 11 moving in the closing direction has reached the first position, the switch 21 switches from off to on. A signal from the switch 21 is input to the control device 6. The control device 6 uses the on signal from the switch 21 as a signal indicating that the door 11 is fully closed.

[0023] The measuring device 22 is a distance sensor that emits a laser and measures the distance to an object that the laser hits. Figures 2 and 3 show an example in which the measuring device 22 is attached to the hanger case 16 via a mounting bracket 23. The measuring device 22 emits a laser from above along the end face 11a of the door 11 arranged at the first position.

[0024] The measuring device 22 is preferably disposed so that the laser passes between the end surface 11a of the door 11 disposed at the first position and the pillar 19 as viewed from the landing 8 side. In Figs. 2 and 3, the laser emitted from the measuring device 22 is indicated by a dashed arrow B. In the example shown in Figs. 2 and 3, the laser emitted from the measuring device 22 passes vertically downward from the door 11 to the landing 8 side and hits the threshold 18 from above. Therefore, if there is no foreign object between the measuring device 22 and the threshold 18, the distance to the threshold 18 is measured by the measuring device 22. The laser emitted from the measuring device 22 may pass through a space formed between the end surface 11a of the door 11 disposed at the first position and the pillar 19. The result measured by the measuring device 22 is input to the control device 6.

[0025] The control device 6 includes a door control unit 31, an equipment control unit 32, a movement control unit 33, and a determination unit 34. The door control unit 31 controls the electric motor 20. The equipment control unit 32 controls the equipment provided in the car 1. For example, the measuring device 22 is controlled by the equipment control unit 32. The movement control unit 33 controls the hoisting machine 5.

[0026] Next, the operation of the elevator apparatus will be described with reference to Fig. 5. Fig. 5 is a flowchart showing an example of the operation of the elevator apparatus in the first embodiment. Fig. 5 shows an operation flow when the stopped car 1 departs from the hall 8.

[0027] The control device 6 determines whether the door 11 is being closed (S101). For example, when a close button on an operation panel (not shown) provided on the car 1 is pressed, the door control unit 31 controls the electric motor 20 to move the door 11 in the closing direction. This results in a Yes determination in S101. If a Yes determination is made in S101, the equipment control unit 32 causes the measuring device 22 to irradiate a laser (S102).

[0028] When the closing operation of the door 11 is started in S101, the control device 6 determines whether or not the door 11 has reached the first position (S103). As described above, when the door 11 moving in the closing direction reaches the first position, the switch 21 switches from OFF to ON. An ON signal is input from the switch 21 to the control device 6, and the result of the determination in S103 is Yes.

[0029] If the determination in S103 is Yes, the measuring device 22 measures the distance (S104). Information on the distance measured by the measuring device 22 is input to the control device 6. If the determination in S103 is Yes, the determination unit 34 determines whether or not there is a foreign object caught in the door 11 (S105). The determination unit 34 makes the determination in S105 based on the distance measured by the measuring device 22.

[0030] As an example, the determination unit 34 determines that there is a foreign object caught in the door 11 if the distance measured by the measuring device 22 when the door 11 moving in the closing direction reaches the first position is smaller than the threshold value Lth1. The threshold value Lth1 is set in advance. For example, if the distance measured by the measuring device 22 when there is no foreign object is distance L0 [mm], the threshold value Lth1 is set to L0-5. The value of the threshold value Lth1 is not limited to the above example. Note that, in order to accurately determine the presence or absence of a foreign object caught in the door 11, it is preferable that the measurement accuracy of the measuring device 22 is about ±1 mm. It is even more preferable that the measurement accuracy of the measuring device 22 is within ±1 mm.

[0031] For example, if a string attached to a pet gets caught in the door 11, the laser from the measuring device 22 hits the string. In this case, the measuring device 22 measures the distance to the string caught in the door 11. If the distance is smaller than the threshold Lth1, the determining unit 34 determines that there is a foreign object caught in the door 11 (Yes in S105). If the determining unit 34 determines that there is a foreign object caught in the door 11, the door control unit 31 reverses the door 11 (S106). That is, the door control unit 31 moves the door 11 in the opening direction in S106.

[0032] On the other hand, if the determination unit 34 does not determine that there is a foreign object caught in the door 11 (No in S105), the control device 6 determines whether or not a start condition is satisfied (S107). The start condition is a condition for the car 1 to start moving after the door 11 is opened. The start condition is set in advance. If the start condition is satisfied (Yes in S107), the movement control unit 33 controls the hoist 5 to start the movement of the car 1 (S108).

[0033] In the example shown in this embodiment, even if a string or the like attached to a pet gets caught in the door 11, the string can be detected as a foreign object. In addition, in the example shown in this embodiment, a measuring device 22 is used to detect foreign objects. The measuring device 22 irradiates a laser and measures the distance to the object hit by the laser. The measuring device 22 can be attached so that the laser is irradiated along the end face 11a of the door 11 placed in the first position, and adjustment for foreign object detection can be easily performed.

[0034] Other functions that can be adopted by the elevator apparatus will be described below. If possible, the elevator apparatus may adopt a combination of the following functions.

[0035] 5, a Yes determination is made in S101, causing the measuring device 22 to irradiate a laser. As another example, the measuring device 22 may irradiate a laser by a Yes determination in S103.

[0036] In the examples shown in Figures 2 and 3, a laser is emitted vertically downward from the measuring device 22. As another example, a laser may be emitted vertically upward from the measuring device 22. Figure 6 is a diagram showing another example of an elevator device. Figure 6 is a diagram corresponding to Figure 2.

[0037] 6, the measuring device 22 is provided on the threshold 18. For example, the measuring device 22 is provided on the downward surface of the threshold 18, and irradiates a laser vertically upward from below the threshold 18. In the example shown in FIG. 6, the laser is also irradiated from the measuring device 22 so as to follow the end face 11a of the door 11 arranged in the first position. In this case, the laser irradiated from the measuring device 22 may pass through the through hole 18a formed in the threshold 18.

[0038] In the examples shown in Figs. 2 and 3, the two doors 11 move in the same direction when opening and closing. As another example, the car 1 may be provided with a plurality of doors 11 that move in opposite directions when opening and closing. Fig. 7 is a diagram showing another example of an elevator device. In the example shown in Fig. 7, the car 1 is provided with two doors 11 of a so-called center-opening type. That is, the right door 11 shown in Fig. 7 is opened by moving to the right and closed by moving to the left. The left door 11 is opened by moving to the left and closed by moving to the right. In the example shown in Fig. 7, the end face 11a of the right door 11 and the end face 11a of the left door 11 face each other. When getting on and off the car 1, a user passes between the end face 11a of the right door 11 and the end face 11a of the left door 11.

[0039] In the example shown in Fig. 7, the door 11 is further provided with a door stop 24. In addition, a restricting member 25 for restricting movement of the door 11 in the closing direction is provided on the hanger case 16. That is, movement of the door 11 in the closing direction is restricted to a position where the door stop 24 comes into contact with the restricting member 25. The restricting member 25 is functionally disposed so as to be located exactly midway between the right door 11 and the left door 11. In the example shown in Fig. 7, the measuring device 22 is provided on the restricting member 25. A laser is emitted vertically downward from the measuring device 22.

[0040] In the example shown in FIG. 7, the measuring device 22 may be provided on the threshold 18 as in the example shown in FIG.

[0041] As another example, the elevator device may further include a detection device 26 as shown in FIG. 4. The detection device 26 detects that the door 11 moving in the closing direction has reached the second position. The second position is a position of the door 11 where the distance between the end face 11a and the pillar 19 is a distance L2. The distance L2 is set in advance. As an example, the distance L2 is 5 mm. That is, the door 11 moving in the closing direction reaches the second position after reaching the first position. The car 1 may also be equipped with a center-opening door 11.

[0042] If the car 1 is equipped with the detection device 26, the start condition may include the detection by the detection device 26 that the door 11 moving in the closing direction has reached the second position. In this example, it is possible to determine whether or not there is a foreign object caught in the door 11 before the start condition is met, i.e., before the car 1 starts moving.

[0043] Fig. 8 is a diagram showing another example of an elevator device. In the example shown in Fig. 8, the car 1 further includes a measuring device 27. As in the examples shown in Figs. 2 and 3, the measuring device 22 irradiates a laser and measures the distance to an object hit by the laser. In the example shown in Fig. 8, the measuring device 22 is provided on the hanger case 16 via a mounting bracket 23. The measuring device 22 irradiates a laser vertically downward from above along the end face 11a of the door 11 arranged at the first position.

[0044] Measuring device 27, like measuring device 22, is a distance sensor that irradiates a laser and measures the distance to an object that the laser hits. In the example shown in Fig. 8, measuring device 27 is provided on threshold 18. Measuring device 27 irradiates a laser from below along end face 11a of door 11 placed at the first position.

[0045] Like the measuring device 22, the measuring device 27 is preferably disposed so that a laser passes between the end face 11a of the door 11 disposed at the first position and the pillar 19 when viewed from the landing 8 side. In Fig. 8, the laser emitted from the measuring device 27 is indicated by a dashed arrow C.

[0046] 8 shows an example in which a laser is emitted vertically upward from measuring device 27 and passes through through hole 18a formed in threshold 18. The laser emitted from measuring device 27 may pass vertically upward on the landing 8 side of door 11. The laser emitted from measuring device 27 may pass through a space formed between end face 11a of door 11 arranged at the first position and pillar 19. The result of measurement by measuring device 27 is input to control device 6.

[0047] In the example shown in Fig. 8, when a stopped car 1 departs from a hall 8, an operation similar to that shown in Fig. 5 is performed. In S102, the equipment control unit 32 causes both the measuring device 22 and the measuring device 27 to emit lasers. In S104, the measuring device 22 measures the distance and the measuring device 27 measures the distance.

[0048] If the result of S103 is Yes, the determination unit 34 determines whether or not there is a foreign object caught in the door 11 (S105). The determination unit 34 makes the determination in S105 based on the distance measured by the measuring device 22 and the distance measured by the measuring device 27.

[0049] As an example, the determination unit 34 calculates the sum of the distance measured by the measuring device 22 and the distance measured by the measuring device 27 when the door 11 moving in the closing direction reaches the first position. The determination unit 34 determines that there is a foreign object caught in the door 11 when the calculated sum is greater than the threshold value Lth2 and smaller than the threshold value Lth3.

[0050] For example, when the distance between the measuring device 22 and the measuring device 27 is α [mm], the threshold value Lth2 and the threshold value Lth3 are set as follows. Threshold Lth2 = α-β Threshold Lth3 = α-γ Here, β is the maximum value [mm] of an object to be detected as a foreign object, γ is the minimum value [mm] of an object to be detected as a foreign object, and the threshold value Lth3 is a value larger than the threshold value Lth2.

[0051] As an example, consider a case where the distance α from measuring device 22 to measuring device 27 is 2000 mm. When an object between 5 mm and 10 mm is detected as a foreign object, β=10 mm, so the threshold Lth2=2000-10=1990 mm. Similarly, γ=5 mm, so the threshold Lth3=2000-5=1995 mm. If the sum Lsum of the distance measured by measuring device 22 and the distance measured by measuring device 27 satisfies the following formula, the judgment unit 34 judges that there is a foreign object caught in door 11. If the sum Lsum does not satisfy the following formula, the judgment unit 34 judges that there is no foreign object caught in door 11. 1990mm <Lsum<1995mm

[0052] In this example, the size of an object to be detected as a foreign object can be set in advance. When detecting an object such as a string tied to a pet or an electric cord as a foreign object, it is preferable to set the value obtained by subtracting the threshold value Lth2 from the threshold value Lth3 to be 10 mm or less.

[0053] 9 is a diagram showing an example of hardware resources of the control device 6. The control device 6 includes, as hardware resources, a processing circuit 40 including a processor 41 and a memory 42. The processing circuit 40 may include multiple processors 41. The processing circuit 40 may include multiple memories 42.

[0054] In this embodiment, the units denoted by the reference numerals 31 to 34 indicate functions possessed by the control device 6. The functions of the units denoted by the reference numerals 31 to 34 can be realized by software written as a program, firmware, or a combination of software and firmware. The program is stored in a memory 42. The control device 6 realizes the functions of the units denoted by the reference numerals 31 to 34 by executing the program stored in the memory 42 by a processor 41 (computer). A semiconductor memory or the like can be adopted as the memory 42.

[0055] Fig. 10 is a diagram showing another example of hardware resources of the control device 6. In the example shown in Fig. 10, the control device 6 includes a processing circuit 40 including a processor 41, a memory 42, and dedicated hardware 43. Fig. 10 shows an example in which some of the functions of the control device 6 are realized by the dedicated hardware 43. All of the functions of the control device 6 may be realized by the dedicated hardware 43. As the dedicated hardware 43, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination of these can be adopted. [Industrial Applicability]

[0056] The elevator system according to the present disclosure can be applied to various elevator systems regardless of the door opening and closing method. [Explanation of symbols]

[0057] 1 car, 2 counterweight, 3 elevator, 4 rope, 5 hoist, 6 control device, 7 machine room, 8 landing, 11 door, 11a end face, 12 door panel, 13 hanger, 14 roller, 15 cam, 16 hanger case, 17 rail, 18 threshold, 18a through hole, 19 pillar, 20 motor, 21 switch, 22 measuring device, 23 mounting bracket, 24 door stop, 25 regulating member, 26 detection device, 27 measuring device, 31 door control unit, 32 equipment control unit, 33 movement control unit, 34 judgment unit, 40 processing circuit, 41 processor, 42 memory, 43 dedicated hardware

Claims

1. A door on the cage, a first detection device that detects when the door moving in a closing direction reaches a first position; a first measuring device that irradiates a laser from above along an edge surface of the door disposed at the first position and measures a distance to an object that is hit by the laser; a second measuring device that irradiates a laser from below along the edge surface of the door disposed at the first position and measures a distance to an object that is hit by the laser; a determination unit that, when the first detection device detects that the door has reached the first position, determines whether or not there is a foreign object caught in the door based on the distance measured by the first measuring device and the distance measured by the second measuring device; and An elevator device comprising:

2. 2. The elevator apparatus according to claim 1, wherein the determination unit determines that a foreign object is caught in the door when a sum of the distance measured by the first measuring device and the distance measured by the second measuring device is greater than a first threshold value and less than a second threshold value.

3. The second threshold is greater than the first threshold, The elevator apparatus according to claim 2 , wherein a value obtained by subtracting the first threshold value from the second threshold value is equal to or less than 10 mm.

4. A door on the cage, a first detection device that detects when the door moving in a closing direction reaches a first position; a first measuring device that irradiates a laser along an edge surface of the door disposed at the first position and measures a distance to an object that is hit by the laser; a determination unit that, when the first detection device detects that the door has reached the first position, determines whether or not there is a foreign object trapped in the door based on the distance measured by the first measurement device; and An elevator device comprising:

5. The elevator apparatus according to claim 4 , wherein the determination unit determines that a foreign object is caught in the door when the distance measured by the first measuring device is smaller than a third threshold value.

6. The car further includes a second detection device that detects when the door moving in a closing direction reaches a second position; the door moving in a closing direction reaches the second position after reaching the first position, 6. The elevator apparatus according to claim 1, wherein a condition for the car to start moving after the door is opened includes the second detection device detecting that the door has reached the second position.

7. A rail for guiding the movement of the door; A support device for supporting the rail; a restricting member provided on the support device for restricting movement of the door in a closing direction; Equipped with The elevator apparatus according to claim 1 , wherein the first measuring device is provided on the regulating member.

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