Elevator arrangement

Abstract

An elevator device has a door (11), a switch (21), a detector (22), a detector (27), and a determination section (34). The detector (22) irradiates laser light from above in a manner along an end surface of the door (11) disposed at a first position. The detector (27) irradiates laser light from below in a manner along the end surface of the door (11) disposed at the first position. The determination section (34) determines whether or not a foreign object is caught by the door (11) based on a distance detected by the detector (22) and a distance detected by the detector (27) when the door (11) reaches the first position is detected by the switch (21).

Description

TECHNICAL FIELD

[0001] The present application relates to an elevator device. BACKGROUND

[0002] An elevator device is described in Patent Literature 1. The elevator device described in Patent Literature 1 has a safety device. The safety device has a light emitter and a light receiver. The light emitter is provided at a sill of a car, for example. The light receiver is provided at a door hanger of the car. The light receiver receives light emitted from the light emitter.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2014-40292 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] In the elevator device described in Patent Literature 1, when a rope is caught by a door, the light from the light emitter is blocked by the rope. Thereby, the light receiver cannot receive the light from the light emitter any more, so that it is detected that the rope is caught by the door. However, in the elevator device described in Patent Literature 1, the light receiver must be installed accurately in accordance with the position of the light from the light emitter. Therefore, there is a problem that it takes time to adjust the light emitter and the light receiver.

[0008] The present application has been achieved in order to solve the above-described problems. An object of the present application is to provide an elevator device capable of detecting a foreign matter caught by a door and capable of easily performing adjustment for the detection.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] The elevator device of the present application has: a door provided at a car; a first detection device that detects a case where the door moving in a closing direction reaches a first position; a first measurer that measures a distance to an object irradiated with laser light from above in a manner along an end surface of the door provided at the first position; a second measurer that measures a distance to an object irradiated with laser light from below in a manner along the end surface of the door provided at the first position; and a determination section that, when the door reaching the first position is detected by the first detection device, determines whether or not a foreign matter caught by the door exists, on the basis of the distance measured by the first measurer and the distance measured by the second measurer.

[0011] The elevator device of the present application has: a door provided to a car; a first detection device that detects a case where the door moving in a closing direction reaches a first position; a first measurer that measures a distance to an object irradiated with laser light in a manner of irradiating the laser light along an end surface of the door disposed at the first position; and a determination section that, when the door reaching the first position is detected by the first detection device, determines whether or not a foreign object pinched by the door exists based on the distance measured by the first measurer.

[0012] Effects of the Invention

[0013] According to the elevator device of the present application, a foreign object pinched by a door can be detected, and adjustment for the detection can be easily performed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a view that shows an example of the elevator device in Embodiment 1.

[0015] Figure 2 is a view that shows a front portion of the car as viewed from the landing side.

[0016] Figure 3 is a view that shows a front portion of the car as viewed from the landing side. Figure 2 is a view that shows a front portion of the car as viewed from the A direction shown in FIG.

[0017] Figure 4 is a view for explaining a function of the elevator device.

[0018] Figure 5 is a flowchart that shows an example of the operation of the elevator device in Embodiment 1.

[0019] Figure 6 is a view that shows another example of the elevator device.

[0020] Figure 7 is a view that shows another example of the elevator device.

[0021] Figure 8 is a view that shows another example of the elevator device.

[0022] Figure 9 is a view that shows an example of a hardware resource of the control device.

[0023] Figure 10 is a view that shows another example of a hardware resource of the control device. DETAILED DESCRIPTION

[0024] Hereinafter, detailed description will be made with reference to the drawings. Repetitive description is appropriately simplified or omitted. In each drawing, the same reference numerals denote the same parts or corresponding parts.

[0025] Embodiment 1

[0026] Embodiment 1Figure 1 This is a diagram illustrating an example of an elevator device in Embodiment 1. Figure 1 The elevator assembly shown has a car 1 and a counterweight 2. The car 1 moves up and down in a shaft 3. The car 1 and the counterweight 2 are suspended in the shaft 3 by ropes 4. The counterweight 2 moves up and down in the shaft 3 in the opposite direction to the direction of movement of the car 1. Figure 1 An elevator device with a 1:1 winding method is shown as an example.

[0027] Rope 4 is wound around traction machine 5. Traction machine 5 drives car 1. Control device 6 controls traction machine 5. That is, the movement of car 1 is controlled by control device 6. In addition, control device 6 controls the equipment of car 1. Figure 1 This example shows a machine room 7 located above the shaft 3, where the traction machine 5 and control device 6 are installed. The traction machine 5 and control device 6 can also be installed within the shaft 3. The traction machine 5 can be installed at the top of the shaft 3 or at the bottom of the shaft 3.

[0028] Figure 1 This shows the state of car 1 stopped at a certain floor 8. Figure 2 This is a view of the front of car 1 from the side of floor 8. Figure 3 From Figure 2 The diagram shown is a view of the front of car 1 from direction A. Additionally, Figure 4 This is a diagram used to illustrate the function of an elevator system.

[0029] The car 1 has a door 11. The door 11 has a door panel 12, a hanger 13, a roller 14, and a cam 15. In addition, the car 1 has a hanger housing 16, a track 17, a sill 18, a column 19, a motor 20, a switch 21, and a measuring device 22.

[0030] Door panel 12 opens and closes the entrance / exit formed in car 1. Hereinafter, the entrance / exit formed in car 1 will also be referred to as car entrance / exit. Hanger 13 is provided on the upper part of door panel 12 extending upward from door panel 12. Roller 14 is provided on hanger 13 in a rotatable manner. Cam 15 is provided on the upper part of hanger 13 protruding upward from hanger 13.

[0031] The hanger housing 16 is provided on the components forming the car compartment. The hanger housing 16 is positioned above the car entrance / exit. The hanger housing 16 is an example of a support device that supports the door 11, etc. The door 11, track 17, switch 21, and measuring device 22 are supported on the hanger housing 16.

[0032] Track 17 is disposed on the hanger housing 16. Track 17 is horizontally positioned above the car entrance / exit. Roller 14 is mounted on the upper surface of track 17. Thus, door 11 is suspended from track 17. Roller 14 rolls on the upper surface of track 17, thereby guiding the movement of door 11. Sill 18 is horizontally positioned below door 11. Sill 18 guides the movement of the lower end of door 11.

[0033] Figure 2 and Figure 3 An example is shown where the car 1 has two doors 11. Figure 2 and Figure 3 In the example shown, the two doors 11 move in the same direction when opening and closing. Specifically, in Figure 2 In the example shown, door 11 opens by moving to the left and closes by moving to the right. Hereinafter, the direction in which door 11 opens will also be referred to as the opening direction. The direction in which door 11 closes will also be referred to as the closing direction.

[0034] exist Figure 2 In the example shown, the right-side door 11 is also referred to as the high-speed door, and the left-side door 11 is also referred to as the low-speed door. The end face 11a of the right-side door 11 is the initial end face of the door panel 12 that faces the direction of travel when the door 11 moves in the closing direction. The end face 11a is opposite to the column 19. The column 19 is one of the components forming the entrance and exit of the car. When the user gets on or off the car 1, they pass between the end face 11a and the column 19.

[0035] The electric motor 20 generates a driving force for opening and closing the door 11.

[0036] Switch 21 is provided in the hanger housing 16. Switch 21 is switched on and off by cam 15. For example, if the distance between end face 11a and post 19 is less than or equal to distance L1, switch 21 is on. If the distance between end face 11a and post 19 is greater than distance L1, switch 21 is off. Distance L1 is preset. As an example, distance L1 is 9 mm. Hereinafter, the position of door 11 with distance L1 between end face 11a and post 19 is also referred to as the first position.

[0037] Switch 21 is an example of a detection device used to detect when the door 11, which has moved in the closing direction, has reached the first position. That is, when the door 11, which has moved in the closing direction, reaches the first position, switch 21 switches from open to closed. A signal from switch 21 is input to control device 6. In control device 6, the closed signal from switch 21 is used as a signal indicating that the door 11 is fully closed.

[0038] The measuring device 22 is a distance sensor that irradiates a laser and measures the distance up to the object irradiated by the laser. Figure 2 and Figure 3An example is shown where the measuring device 22 is mounted on the hanger housing 16 via the mounting member 23. The measuring device 22 irradiates a laser from above along the end face 11a of the door 11 positioned in the first position.

[0039] The measuring device 22 is preferably configured such that, when viewed from the side of the landing station 8, the laser passes between the end face 11a of the door 11 located in the first position and the column 19. Figure 2 and Figure 3 In the diagram, dashed arrow B represents the laser light emanating from measuring device 22. Figure 2 and Figure 3 In the example shown, the laser beam emitted from the measuring device 22 passes vertically downwards through a position closer to the landing 8 than the door 11 and illuminates the sill 18 from above. Therefore, if there are no obstructions between the measuring device 22 and the sill 18, the distance to the sill 18 can be measured by the measuring device 22. The laser beam emitted from the measuring device 22 can also pass through the space formed between the end face 11a of the door 11 located in the first position and the column 19. The result measured by the measuring device 22 is input to the control device 6.

[0040] 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 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 traction machine 5.

[0041] Next, also refer to Figure 5 The operation of the elevator mechanism is explained. Figure 5 This is a flowchart illustrating an example of the operation of the elevator device in Implementation Method 1. Figure 5 The procedure for the stopped car 1 to depart from floor 8.

[0042] In the control device 6, it is determined whether the door 11 is closing (S101). For example, when the close button on the operation panel (not shown) of the car 1 is pressed, the door control unit 31 controls the motor 20 to move the door 11 in the closing direction. Therefore, it is determined to be "yes" in S101. If it is determined to be "yes" in S101, the equipment control unit 32 causes the measuring device 22 to irradiate a laser (S102).

[0043] When the closing action of door 11 begins in S101, the control device 6 determines whether door 11 has reached the first position (S103). As described above, when door 11, which has moved in the closing direction, reaches the first position, switch 21 switches from off to on. By inputting an on signal from switch 21 to control device 6, the control device 6 determines "yes" in S103.

[0044] If the determination in S103 is "Yes", the distance measurement by the measurer 22 is performed (S104). The information of the distance measured by the measurer 22 is input to the control device 6. When the determination in S103 is "Yes", the determination section 34 determines whether there is a foreign object caught by the door 11 (S105). The determination section 34 performs the determination in S105 based on the distance measured by the measurer 22.

[0045] For example, in a case where the distance measured by the measurer 22 when the door 11 moving in the closing direction reaches the first position is less than the threshold value Lth1, the determination section 34 determines that there is a foreign object caught by the door 11. The threshold value Lth1 is set in advance. For example, if the distance measured by the measurer 22 when there is no foreign object is a distance L0 [mm], Lth1 [mm] = L0 - 5 is set. The value of the threshold value Lth1 is not limited to the above example. Further, in order to accurately determine the presence or absence of a foreign object caught by the door 11, the measurement accuracy of the measurer 22 is preferably about ±1 mm. It is further preferable that the measurement accuracy of the measurer 22 be within ±1 mm.

[0046] For example, when a rope connected to a pet is caught by the door 11, the laser light from the measurer 22 is irradiated to the rope. In this case, in the measurer 22, the distance to the rope caught by the door 11 is measured. If the distance is less than the threshold value Lth1, the determination section 34 determines that there is a foreign object caught by the door 11 (Yes in S105). When the determination section 34 determines that there is a foreign object caught by the door 11, the door control section 31 reverses the door 11 (S106). That is, the door control section 31 moves the door 11 in the opening direction in S106.

[0047] On the other hand, if the determination section 34 does not determine that there is a foreign object caught by the door 11 (No in S105), in the control device 6, it is determined whether the start condition is satisfied (S107). The start condition is a condition for starting the movement of the car 1 after the door 11 is opened. The start condition is set in advance. When the start condition is satisfied (Yes in S107), the movement control section 33 controls the hoist 5 to start the movement of the car 1 (S108).

[0048] According to the example shown in the present embodiment, even in a case where a rope connected to a pet or the like is caught by the door 11, the rope can be detected as a foreign object. In the example shown in the present embodiment, the measurer 22 is used for detecting a foreign object. The measurer 22 irradiates laser light and measures the distance to an object irradiated with the laser light. The measurer 22 can be installed so as to irradiate laser light along the end surface 11a of the door 11 disposed at the first position, and adjustment for foreign object detection can be easily performed.

[0049] The following describes other functions that can be employed by the present elevator device. If possible, the elevator device can employ a plurality of the functions shown below in combination.

[0050] In Figure 5 the example shown, the laser is irradiated from the measurer 22 by determining "Yes" in S101. As another example, the irradiation of the laser from the measurer 22 can also be performed by determining "Yes" in S103.

[0051] In Figure 2 the example shown, the laser is irradiated vertically downward from the measurer 22. As another example, the laser can also be irradiated vertically upward from the measurer 22. Figure 3 is a diagram showing another example of the elevator device. Figure 6 is a diagram corresponding to Figure 6 . Figure 2

[0052] In Figure 6 the example shown, the measurer 22 is provided to the sill 18. For example, the measurer 22 is provided to the downward face of the sill 18, and irradiates the laser toward the vertically upward from the lower side of the sill 18. In Figure 6 the example shown, the laser is also irradiated from the measurer 22 in a manner along the end face 11a of the door 11 disposed in the first position. In this case, the laser irradiated from the measurer 22 can also pass through the through-hole 18a formed in the sill 18.

[0053] In Figure 2 and Figure 3 the examples shown, the two doors 11 move in the same direction when opening and closing. As another example, the car 1 can have a plurality of doors 11 that move in opposite directions when opening and closing. Figure 7 is a diagram showing another example of the elevator device. In Figure 7 the example shown, the car 1 has two doors 11 of a so-called center opening type. That is, Figure 7 the right door 11 shown in Figure 7 is opened by moving to the right side and closed by moving to the left side. The left door 11 is opened by moving to the left side and closed by moving to the right side. In the example shown, the end face 11a of the right door 11 opposes the end face 11a of the left door 11. The user passes between the end face 11a of the right door 11 and the end face 11a of the left door 11 when getting on and off the car 1.

[0054] Figure 7 ​In the example shown, door 11 also has a door stop 24. Additionally, a limiting member 25 is provided in the hanger housing 16 to restrict movement of door 11 in the closing direction. That is, movement of door 11 in the closing direction is limited to the position where the door stop 24 contacts the limiting member 25. The limiting member 25 is functionally configured to be located precisely between the right-hand door 11 and the left-hand door 11. Figure 7 In the example shown, the measuring device 22 is positioned on the limiting member 25. A laser beam is irradiated vertically downwards from the measuring device 22.

[0055] exist Figure 7 In the example shown, the measuring device 22 can also be as follows: Figure 6 As shown in the example, it is set at the foot of the slope 18.

[0056] As other examples, such as Figure 4 As shown, the elevator unit may also include a detection device 26. The detection device 26 detects when the door 11, moving in the closing direction, reaches its second position. The second position is the position of the door 11 at a distance L2 between the end face 11a and the column 19. This distance L2 is preset. For example, distance L2 is 5 mm. That is, the door 11, moving in the closing direction, reaches its second position after reaching its first position. Alternatively, the car 1 may also have a centrally opening door 11.

[0057] When the car 1 is equipped with a detection device 26, the situation where the detection device 26 detects that the door 11, which is moving in the closing direction, has reached the second position can also be included in the start condition. According to this example, it is possible to determine whether there is a foreign object trapped by the door 11 before the start condition is met, that is, before the car 1 begins to move.

[0058] Figure 8 These are diagrams illustrating other examples of elevator systems. Figure 8 In the example shown, the car 1 also has a measuring device 27. The measuring device 22 and... Figure 2 and Figure 3 The example shown also involves irradiating the object with a laser and measuring the distance to the object illuminated by the laser. Figure 8 In the example shown, the measuring device 22 is mounted on the hanger housing 16 via the mounting member 23. The measuring device 22 irradiates the laser vertically downward from above along the end face 11a of the door 11 located in the first position.

[0059] Similar to measuring device 22, measuring device 27 is a distance sensor that illuminates a laser and measures the distance to the object illuminated by the laser. Figure 8 In the example shown, the measuring device 27 is positioned on the sill 18. The measuring device 27 irradiates a laser from below along the end face 11a of the door 11 located in the first position.

[0060] The measurer 27 is preferably configured so that, as viewed from the landing 8 side, the laser light passes between the end surface 11a of the door 11 disposed in the first position and the column 19, similarly to the measurer 22. In Figure 8 In the present embodiment, the laser light emitted from the measurer 27 is indicated by a broken arrow C.

[0061] Figure 8 An example in which the laser light is emitted vertically upward from the measurer 27 and passes through the through-hole 18a formed in the sill 18 is shown. The laser light emitted from the measurer 27 can also pass vertically upward beyond the door 11 toward the landing 8 side. The laser light emitted from the measurer 27 can also pass through the space formed between the end surface 11a of the door 11 disposed in the first position and the column 19. The result of the measurement by the measurer 27 is input to the control device 6.

[0062] In Figure 8 the example shown, the same actions as those shown in Figure 5 are performed when the stopped car 1 departs from the landing 8. Further, in S102, the equipment control section 32 causes the laser light to be emitted from both the measurer 22 and the measurer 27. In S104, the measurement of the distance by the measurer 22 and the measurement of the distance by the measurer 27 are performed.

[0063] Further, when the determination in S103 is "Yes", the determination section 34 determines whether there is a foreign object that is caught by the door 11 (S105). The determination section 34 performs the determination in S105 on the basis of the distance measured by the measurer 22 and the distance measured by the measurer 27.

[0064] As an example, the determination section 34 calculates the sum of the distance measured by the measurer 22 when the door 11 moving in the closing direction reaches the first position and the distance measured by the measurer 27. In the case where the calculated sum is greater than a threshold value Lth2 and less than a threshold value Lth3, the determination section 34 determines that there is a foreign object that is caught by the door 11.

[0065] For example, in the case where the distance between the measurer 22 and the measurer 27 is a [mm], the threshold value Lth2 and the threshold value Lth3 are set as follows.

[0066] Threshold value Lth2 = a - β

[0067] Threshold value Lth3 = a - γ

[0068] Here, β is the maximum value [mm] of the object detected as a foreign object. γ is the minimum value [mm] of the object detected as a foreign object. The threshold value Lth3 is a value greater than the threshold value Lth2.

[0069] As an example, consider a case where the distance a from the measurer 22 to the measurer 27 is 2000 mm. In a case where an object of 5 mm to 10 mm is detected as a foreign object, since β = 10 mm, the threshold Lth2 = 2000 - 10 = 1990 mm. Also, since γ = 5 mm, the threshold Lth3 = 2000 - 5 = 1995 mm. The determination section 34 determines that a foreign object is present that is caught by the door 11 in a case where the sum Lsum of the distance measured by the measurer 22 and the distance measured by the measurer 27 satisfies the following expression. The determination section 34 determines that a foreign object is not present that is caught by the door 11 if the sum Lsum does not satisfy the following expression.

[0070] 1990 mm < Lsum < 1995 mm

[0071] In this example, the size of the object detected as a foreign object can be set in advance. In a case where an object such as a rope or an electric cord connected to a pet is detected as a foreign object, it is preferable to set the value obtained by subtracting the threshold Lth2 from the threshold Lth3 to be 10 mm or less.

[0072] Figure 9 is a diagram that shows an example of the hardware resources of the control device 6. The control device 6 has a processing circuit 40 that includes a processor 41 and a memory 42 as the hardware resources. A plurality of processors 41 can also be included in the processing circuit 40. A plurality of memories 42 can also be included in the processing circuit 40.

[0073] In the present embodiment, each of the parts denoted by the reference numerals 31 to 34 represents a function that the control device 6 has. The functions of each of the parts denoted by the reference numerals 31 to 34 can be realized by software, firmware, or a combination of software and firmware described as a program. The program is stored in the memory 42. The control device 6 realizes the functions of each of the parts denoted by the reference numerals 31 to 34 by executing the program stored in the memory 42 by the processor 41 (computer). As the memory 42, a semiconductor memory or the like can be employed.

[0074] Figure 10 is a diagram that shows another example of the hardware resources of the control device 6. In the example shown in Figure 10 The control device 6 has a processing circuit 40 that includes a processor 41, a memory 42, and a dedicated hardware 43. Figure 10 An example in which a part of the functions that the control device 6 has is realized by the dedicated hardware 43 is shown. The entire functions that the control device 6 has can also 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 thereof can be employed.

[0075] Industrial Applicability

[0076] The elevator device of the present application is not dependent on the opening and closing method of the door, and can be applied to various elevator devices.

[0077] Explanation of Reference Numerals

[0078] 1: car; 2: counterweight; 3: shaft; 4: rope; 5: hoisting machine; 6: control device; 7: machine room; 8: landing; 11: door; 11a: end surface; 12: door panel; 13: hanger; 14: roller; 15: cam; 16: hanger housing; 17: rail; 18: threshold; 18a: through hole; 19: column; 20: motor; 21: switch; 22: measurer; 23: mounting member; 24: door stopper; 25: limiting member; 26: detection device; 27: measurer; 31: door control section; 32: equipment control section; 33: movement control section; 34: determination section; 40: processing circuit; 41: processor; 42: memory; 43: dedicated hardware.

Claims

1. An elevator installation, wherein, The elevator device has: a car having a door; a first detection device that detects that the door moving in a closing direction reaches a first position; a first measurer that measures a distance to an object on which laser light is irradiated, by irradiating the laser light from above in a manner along an end surface of the door disposed at the first position; a second measurer that measures a distance to an object on which laser light is irradiated, by irradiating the laser light from below in a manner along the end surface of the door disposed at the first position; and a determination section that, when the door reaching the first position is detected by the first detection device, determines whether a foreign object is caught by the door, based on the distance measured by the first measurer and the distance measured by the second measurer.

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

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

4. The elevator device according to any one of claims 1 to 3, wherein the car further has a second detection device that detects that the door moving in the closing direction reaches a second position, the door moving in the closing direction reaches the second position after reaching the first position, in a condition for starting movement of the car after the door is opened, detection of the door reaching the second position by the second detection device is included.

5. The elevator device according to any one of claims 1 to 3, having: a rail that guides movement of the door; a support device that supports the rail; and a restriction member that is provided to the support device and restricts movement of the door in the closing direction, the first measurer is provided to the restriction member. ​

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