Elevator landing position detection system and elevator system

Abstract

This provides an elevator landing position detection system that can alleviate layout restrictions. [Solution] The landing position detection system according to the embodiment includes a first laser sensor, a second laser sensor, and a third laser sensor attached to a first engagement vane, and a detection unit provided at the landing. The detection unit is positioned between the first engagement vane and the second engagement vane when the elevator car is in the landing position. The detection unit includes a pair of reflectors and a through hole positioned between the pair of reflectors.

Description

Technical Field

[0001] The present disclosure relates to an elevator landing position detection system and an elevator system.

Background Art

[0002] A landing apparatus for detecting the landing position of an elevator car is known. The landing apparatus is constituted by a sensor attached to a car sill or the elevator car, and a detection member attached to a landing sill, a guide rail, or a hoistway. When the sensor detects the detection member, the landing position of the elevator car is detected. However, the sensor constituting the landing apparatus is arranged to protrude from the structure of the elevator car, and the detection member is arranged to protrude from the structure of the landing. For this reason, the layout of the sensor and the detection member may be restricted.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] An embodiment aims to provide an elevator landing position detection system and an elevator system that can alleviate layout restrictions.

Means for Solving the Problem

[0005] The elevator landing position detection system according to this embodiment includes a first laser sensor, a second laser sensor, and a third laser sensor, which are attached to a first engagement vane for interlocking the elevator car door with the landing door, and are arranged in this order with vertical spacing between them, and a detection unit provided at the landing. The first laser sensor, the second laser sensor, and the third laser sensor are configured to irradiate laser light toward the second engagement vane, which is opposite the first engagement vane, and to detect the reflected laser light. The detection unit is positioned between the first engagement vane and the second engagement vane when the elevator car is in the landing position. The detection unit includes a pair of reflective parts that reflect laser light irradiated from the first laser sensor and the third laser sensor when the elevator car is in the landing position, and a through hole positioned between the pair of reflective parts that allows laser light irradiated from the second laser sensor to pass through.

[0006] The elevator system according to this embodiment includes the landing position detection system described above, and a door opening / closing control unit that controls the opening and closing of the car door and landing door.

[0007] The elevator system according to this embodiment includes the landing position detection system described above and a lifting control unit that controls the raising and lowering of the elevator car. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic diagram of the elevator system according to this embodiment. [Figure 2] Figure 2 is a perspective view of the elevator car door mechanism installed in the elevator car shown in Figure 1, as seen from the outside. [Figure 3] Figure 3 is a perspective view of the landing door device installed at the landing shown in Figure 1, as seen from the elevator shaft. [Figure 4] Figure 4 is a perspective view of the first and second engagement vanes to which the laser sensors shown in Figure 2 are attached. [Figure 5] Figure 5 is a front view of the first and second engagement vanes shown in Figure 4. [Figure 6] Figure 6 is a front view of the laser sensor of the elevator landing position detection system according to this embodiment. [Figure 7] Figure 7 is a top view showing the laser sensor and the part to be detected. [Figure 8] Figure 8 is a perspective view of the detected area shown in Figure 3. [Figure 9] Figure 9 is a front view of the reflective section shown in Figure 8. [Figure 10] Figure 10 shows the position of the elevator car and the operating status of each laser sensor. [Figure 11] Figure 11(a) shows the positional relationship between the laser sensor and the reflector when the elevator car is located below the landing position, and Figure 11(b) shows the positional relationship between the elevator car sill and the landing sill at that time. [Figure 12] Figure 12(a) shows the positional relationship between the laser sensor and the reflector when the elevator car is in the landing position, and Figure 12(b) shows the positional relationship between the elevator car sill and the landing sill at that time. [Figure 13] Figure 13(a) shows the positional relationship between the laser sensor and the reflector when the elevator car is positioned above the landing position, and Figure 13(b) shows the positional relationship between the elevator car sill and the landing sill at that time. [Figure 14] Figure 14(a) shows the positional relationship between the laser sensor and the reflector when the elevator car is located between floors, and Figure 14(b) shows the positional relationship between the elevator car sill and the landing sill at that time. [Modes for carrying out the invention]

[0009] The elevator landing position detection system and elevator system according to embodiments of the present invention will be described below with reference to the drawings. First, the elevator system according to this embodiment will be described using Figure 1.

[0010] As shown in Figure 1, the elevator system 1 includes an elevator car 3 and a counterweight 4 located in the hoistway 2. The elevator car 3 and the counterweight 4 are connected via a main rope 5. The main rope 5 is wound around a traction sheave 7 and a deflection sheave 8 provided on a hoisting machine 6. The elevator car 3 and the counterweight 4 move up and down as the hoisting machine 6 winds up the main rope 5.

[0011] The hoisting machine 6 is installed in a machine room 9 located above the hoistway 2. A control panel 10 is installed in the machine room 9. The control panel 10 is a device that controls the entire elevator system 1, including the hoisting machine 6. For example, the control panel 10 controls the operation of the hoisting machine 6 in response to landing calls and car calls, and brings the elevator car 3 to the landing 11 of the registered destination floor. The control panel 10 includes a lifting control unit 10a, which controls the hoisting machine 6 and controls the lifting and lowering of the elevator car 3.

[0012] Figure 1 shows an example in which a machine room 9 is formed above the hoistway 2, but such a machine room 9 is not required. In this case, the elevator system 1 may be configured as a machine room-less elevator.

[0013] As shown in Figures 2 and 3, the elevator system 1 further includes a car door device 20, a landing door device 30, an engagement device 40, a door opening / closing control unit 10b, and a landing position detection system 50.

[0014] As shown in Figure 2, the car door device 20 is installed on the elevator car 3. The car door device 20 includes a car door 21 and a door drive unit (not shown) that drives the car door 21 to open and close. More specifically, a header case 22 is provided above the car door 21, and a hanger rail 23 is fixed to the header case 22. A hanger plate 24 is provided on the upper part of the car door 21, and rollers 25 that roll along the hanger rail 23 are attached to the hanger plate 24. By driving the aforementioned door drive unit, the car door 21 moves along the car sill 26 and opens and closes.

[0015] As shown in FIG. 3, the landing door device 30 is provided at the landing 11. The landing door device 30 includes a landing door 31. When the car 3 is positioned at the landing position, the landing door 31 opens and closes in conjunction with the car door 21 provided on the car 3. A header case 32 is provided above the landing door 31, and a hanger rail 33 is fixed to the header case 32. A hanger plate 34 is provided at the upper part of the landing door 31, and a roller 35 that rolls on the hanger rail 33 is attached to the hanger plate 34. By driving the above-described door drive unit, the landing door 31 moves along the landing sill 36 to open and close in conjunction with the car door 21.

[0016] As shown in FIG. 2 and FIG. 3, the engagement device 40 is configured to cause the landing door 31 to interlock with the car door 21. The engagement device 40 includes a first engagement vane 41, a second engagement vane 42, a link member 43, a bracket 44, a first engagement roller 45, and a second engagement roller 46.

[0017] As shown in FIG. 5, the first engagement vane 41 is supported by the hanger plate 24 of the car door 21. The first engagement vane 41 is supported by the second engagement vane 42 via the link member 43. The first engagement vane 41 extends in the vertical direction. The first engagement vane 41 is disposed closer to the door opening side than the second engagement vane 42. The door opening side means the direction in which the car door 21 opens.

[0018] The second engagement vane 42 is supported by the hanger plate 24 provided on the car door 21. The second engagement vane 42 extends in the vertical direction. The second engagement vane 42 faces the first engagement vane 41 and is spaced apart from the first engagement vane 41. The second engagement vane 42 is disposed closer to the door closing side than the first engagement vane 41. The door closing side means the direction in which the car door 21 closes.

[0019] As shown in Figure 5, the link member 43 connects the first engaging vane 41 and the second engaging vane 42. The first engaging vane 41 and the second engaging vane 42 may be connected by multiple link members 43.

[0020] As shown in Figures 2 and 5, the bracket 44 attaches the second engaging vane 42 to the hanger plate 24. In this way, the second engaging vane 42 is supported by the hanger plate 24 via the bracket 44.

[0021] As shown in Figure 3, the first engaging roller 45 and the second engaging roller 46 are supported by a hanger plate 34 provided on the landing door 31. The first engaging roller 45 and the second engaging roller 46 may be rotatably mounted on the hanger plate 34. The first engaging roller 45 may be positioned above the second engaging roller 46. When the elevator car 3 is in the landing position, the first engaging roller 45 and the second engaging roller 46 are positioned between the first engaging vane 41 and the second engaging vane 42. When the door is open, as the car door 21 moves to the open side, the second engaging vane 42 comes into contact with the first engaging roller 45 and the second engaging roller 46, causing the landing door 31 to move to the open side. When the door is closed, as the car door 21 moves to the closed side, the first engaging vane 41 comes into contact with the first engaging roller 45 and the second engaging roller 46, causing the landing door 31 to move to the closed side.

[0022] When the landing door 31 is closed, the interlock 47 locks it to prevent it from opening. This lock is released when the door is opened. More specifically, when the second engaging vane 42 starts to move, the second engaging vane 42 comes into contact with the first engaging roller 45, and the lock by the interlock 47 is released. Subsequently, the second engaging vane 42 comes into contact with the first engaging roller 45 and the second engaging roller 46, causing the landing door 31 to move towards the open side.

[0023] The door opening / closing control unit 10b (see Figure 1) controls the opening and closing of the car door 21 and the landing door 31. The door opening / closing control unit 10b controls the door drive unit described above based on the detection of laser light by the laser sensors 51 to 53, which will be described later. The door opening / closing control unit 10b may be incorporated into the control panel 10 described above, or it may be incorporated into a car control panel (not shown) provided in the elevator car 3.

[0024] Next, the elevator landing position detection system according to this embodiment (hereinafter simply referred to as the landing position detection system 50) will be described. The landing position detection system 50 is a system for detecting the landing position of the elevator car 3.

[0025] As shown in Figures 2 and 3, the landing position detection system 50 includes a first laser sensor 51, a second laser sensor 52, a third laser sensor 53, and a detection unit 60.

[0026] As shown in Figures 2 and 4, each of the laser sensors 51 to 53 is attached to the first engagement vane 41 described above. The laser sensors 51 to 53 are arranged in this order with a gap in the vertical direction. The first laser sensor 51 is positioned at the top, and the second laser sensor 52 is positioned below the first laser sensor 51. The third laser sensor 53 is positioned below the second laser sensor 52 and is at the bottom. As shown in Figure 5, the first laser sensor 51 and the second laser sensor 52 are positioned with a pitch dimension L along the vertical direction. The second laser sensor 52 and the third laser sensor 53 are positioned with a pitch dimension L along the vertical direction. Details of dimension L will be described later.

[0027] Each of the laser sensors 51 to 53 is configured to irradiate laser light toward the second engaging vane 42 facing the first engaging vane 41, and to detect the laser light that is reflected back. Each of the laser sensors 51 to 53 has an irradiation function for irradiating laser light and a detection function for detecting the intensity of the laser light reflected by the second engaging vane 42, etc. The intensity of the laser light detected by the laser sensors 51 to 53 is transmitted as a signal to the lifting control unit 10a and the door opening / closing control unit 10b described above.

[0028] As shown in Figures 6 and 7, each of the laser sensors 51-53 is attached to the first engagement vane 41 via a bracket 54. A reinforcing plate 48 is attached to the first engagement vane 41, and the reinforcing plate 48 has a notch 55 formed in it for housing the laser sensors 51-53. Wiring 56 is connected to the laser sensors 51-53, and the wiring 56 extends to the rear of the first engagement vane 41 through a wiring hole 57 formed in the bracket 54. The first engagement vane 41 has a laser light hole 49 formed in it that allows laser light emitted from the laser sensors 51-53 to pass through.

[0029] As shown in Figure 3, the detection unit 60 is provided at each landing 11. In this embodiment, the detection unit 60 is attached to a hanger plate 34 provided on the landing door 31. The detection unit 60 is positioned above the first engagement roller 45 and the second engagement roller 46 described above. As shown in Figure 7, the detection unit 60 is positioned between the first engagement vane 41 and the second engagement vane 42 when the elevator car 3 is in the landing position.

[0030] As shown in Figure 8, the detected unit 60 includes a detected unit body 61, a pair of reflective parts 62, a through hole 63, a bracket 64, and a reinforcing member 65.

[0031] The detected part body 61 is formed to extend in the vertical direction. The detected part body 61 may have a longitudinal direction along the vertical direction. In this embodiment, the detected part body 61 is formed in a T-shape when viewed in the vertical direction. The detected part body 61 includes a first opposing surface 61a and a second opposing surface 61b. The first opposing surface 61a faces the first engaging vane 41. The second opposing surface 61b faces the second engaging vane 42. The second opposing surface 61b is formed on the opposite side from the first opposing surface 61a.

[0032] Each reflective portion 62 is formed on the first opposing surface 61a. The pair of reflective portions 62 are arranged side by side in the vertical direction. The upper reflective portion 62 is positioned to reflect the laser light emitted from the first laser sensor 51 when the elevator car 3 is in the landing position. The lower reflective portion 62 is positioned to reflect the laser light emitted from the third laser sensor 53. The reflective portions 62 have a higher light reflectivity than the first opposing surface 61a of the detection unit body 61. The reflective portions 62 may be formed in a seal-like manner and attached to the first opposing surface 61a.

[0033] The reflective portion 62 is formed to extend in the vertical direction and may have a longitudinal direction along the vertical direction. As shown in Figure 9, the vertical dimension of the reflective portion 62 is set to L + a / 2. Dimension L is the distance from the landing position set to prevent the elevator car 3 from traveling with its doors open. Dimension L is also the pitch dimension of the laser sensors 51-53 described above. Dimension a is the diameter of the through hole 63, which will be described later. The allowable error range for the landing position of the elevator car 3 is set to ±a / 2 from the floor level of the landing 11. The term landing position is not limited to a position where the floor level of the elevator car 3 exactly matches the floor level of the landing 11, but is used to include an error within ±a / 2 of the floor level of the landing 11.

[0034] As shown in Figures 8 and 9, the through-hole 63 is located between the pair of reflectors 62. The through-hole 63 is positioned to allow the laser light emitted from the second laser sensor 52 to pass through when the elevator car 3 is in the landing position. The through-hole 63 extends from the first opposing surface 61a to the second opposing surface 61b and penetrates the main body of the detected unit 61.

[0035] The through-hole 63 has a vertical dimension equal to the allowable error range from the landing position of the elevator car 3 when it is located at the landing position. In this embodiment, the through-hole 63 is formed in a circular shape. As shown in Figure 8, the diameter of the through-hole 63 is a, which is also the vertical dimension of the through-hole 63. The reflective part 62 may be in contact with the through-hole 63. In this case, the vertical dimension of the detected part body 61 may be set to 2L + 2a. The through-hole 63 may be formed at an intermediate position of the detected part body 61 in the vertical direction.

[0036] The bracket 64 attaches the detection unit body 61 to a hanger plate 34 (see Figure 3) provided on the landing door 31. The detection unit body 61 is supported by the hanger plate 34 via the bracket 64. The detection unit body 61 is in contact with the upper surface of the bracket 64.

[0037] The reinforcing member 65 is connected to the detection unit body 61 and the bracket 64. The reinforcing member 65 reinforces the detection unit 60.

[0038] The door opening / closing control unit 10b (see Figure 1) described above may control the opening and closing of the car door 21 and the landing door 31 based on the intensity of the laser light detected by the first laser sensor 51, the second laser sensor 52, and the third laser sensor 53. More specifically, the door opening / closing control unit 10b may open the car door 21 and the landing door 31 when the first laser sensor 51 and the third laser sensor 53 detect the laser light reflected by the corresponding reflector 62, and the intensity of the laser light detected by the second laser sensor 52 is lower than the intensity of the laser light detected by the first laser sensor 51 and the third laser sensor 53 (see Figure 12, described later).

[0039] In this case, the laser light emitted from the second laser sensor 52 passes through the through hole 63 of the detection unit 60 and reaches the second engagement vane 42. The laser light is reflected at the second engagement vane 42 and can pass through the through hole 63 again and reach the second laser sensor 52. As a result, the path of the laser light emitted from the second laser sensor 52 to return to the second laser sensor 52 becomes longer, and the intensity of the laser light that reaches the second laser sensor 52 decreases. Since the second engagement vane 42 is not provided with a reflector 62, the intensity of the laser light that reaches the second laser sensor 52 also decreases in this respect. For this reason, when the elevator car 3 is in the landing position, the intensity of the laser light detected by the second laser sensor 52 is lower than the intensity of the laser light detected by the first laser sensor 51 and the third laser sensor 53.

[0040] In this embodiment, the state in which laser sensors 51 to 53 detect relatively strong laser light reflected by the reflector 62 is referred to as the ON state of laser sensors 51 to 53. The state in which laser sensors 51 to 53 detect laser light weaker than the intensity of the laser light reflected by the reflector 62 is referred to as the OFF state of laser sensors 51 to 53. When the elevator car 3 is in the landing position, the first laser sensor 51 and the third laser sensor 53 are in the ON state, and the second laser sensor 52 is in the OFF state.

[0041] The lifting control unit 10a described above may maintain the elevator car 3 in the landing position if, with the door open, at least one of the first laser sensor 51 and the third laser sensor 53 does not detect laser light. In this case, the elevator car 3 is not raised or lowered from the landing position. In other words, the lifting control unit 10a may maintain the elevator car 3 in the landing position if at least one of the first laser sensor 51 and the third laser sensor 53 is in the OFF state.

[0042] If the second laser sensor 52 does not detect laser light while the elevator car 3 is positioned between floors, the elevator control unit 10a may stop the elevator car 3 from moving up or down after one of the first laser sensor 51 and the third laser sensor 53 detects laser light reflected by the corresponding reflector 62, and then the other detects laser light reflected by the corresponding reflector 62. When one of the first laser sensor 51 and the third laser sensor 53 turns ON, and then the other turns ON, the elevator car 3 is in the landing position. As a result, the elevator car 3 has landed, and the elevator car 3 may be stopped from moving up or down.

[0043] If at least one of the first laser sensor 51 and the third laser sensor 53 does not detect laser light while the elevator car 3 is positioned between floors, the elevator control unit 10a may stop the elevator car 3 from moving up or down after the second laser sensor 52 detects the laser light reflected by the corresponding reflector 62, and the intensity of the laser light detected by the second laser sensor 52 decreases. When the second laser sensor 52 is ON and then OFF, the elevator car 3 is in the landing position. As a result, the elevator car 3 has landed, and the elevator control unit 10a may stop the elevator car 3 from moving up or down.

[0044] Next, the operation of this embodiment, which has the above configuration, will be explained using Figures 10 to 14. Here, we will explain the changes in the state of each laser sensor 51 to 53 when the elevator car 3, which is rising towards the upper floor, lands on the target floor and then continues to rise. In Figures 11 to 14, in order to clarify the drawings, the detected unit 60 is not shown between the first engaging vane 41 and the second engaging vane 42, but is shown in a separate position to the right of the second engaging vane 42. In Figures 11 to 14, the laser light emitted from the first laser sensor 51 is indicated by the symbol L1, the laser light emitted from the second laser sensor 52 is indicated by the symbol L2, and the laser light emitted from the third laser sensor 53 is indicated by the symbol L3.

[0045] (Step S1) While the elevator car 3 is ascending between floors, the first laser sensor 51, the second laser sensor 52, and the third laser sensor 53 are all in the OFF state. During this time, the first engagement vane 41 and the second engagement vane 42 are not present on either side of the detected unit 60, so the laser light emitted from each of the laser sensors 51 to 53 is not reflected by the reflector 62 and reaches the second engagement vane 42. In step S1, it is determined that the elevator car 3 is located between floors.

[0046] (Step S2) As the elevator car 3 approaches the landing position, the first engaging vane 41 and the second engaging vane 42 are positioned on both sides of the detection unit 60, and the reflecting unit 62 positioned on the lower side faces the first laser sensor 51. As a result, the laser light emitted from the first laser sensor 51 is reflected by the reflecting unit 62, and the first laser sensor 51 detects the laser light reflected by the reflecting unit 62. In this case, the first laser sensor 51 is turned ON. In step S2, the second laser sensor 52 is turned OFF, and it is determined that the elevator car 3 is located below the landing position in the range of L to 2L.

[0047] (Step S3) As the elevator car 3 rises further, the reflector 62 located on the lower side faces the second laser sensor 52, as shown in Figures 11(a) and (b). As a result, the laser light emitted from the second laser sensor 52 is reflected by the reflector 62, and the second laser sensor 52 detects the laser light reflected by the reflector 62. In this case, the second laser sensor 52 turns ON. The first laser sensor 51 also detects the laser light reflected by the reflector 62 located on the lower side, and the ON state of the first laser sensor 51 is also maintained. In step S3, it is determined that the elevator car 3 is located below the landing position in the range of 0 to L. If it is detected that the elevator car 3 is located outside this range with the doors open (steps S1, S2, S6, S7), measures are taken to prevent the elevator car 3 from rising or falling.

[0048] In step S3, as the elevator car 3 rises further, the through-hole 63 of the detection unit 60 faces the first laser sensor 51 (not shown). At this time, the laser light emitted from the first laser sensor 51 passes through the through-hole 63 and reaches the second engagement vane 42, and is not reflected by the reflector 62. In this case, the first laser sensor 51 is in the OFF state.

[0049] (Step S4) As the elevator car 3 rises further, the upper reflector 62 faces the first laser sensor 51, as shown in Figures 12(a) and (b). As a result, the laser light emitted from the first laser sensor 51 is reflected by the reflector 62, and the first laser sensor 51 detects the laser light reflected by the reflector 62. In this case, the first laser sensor 51 is turned ON. The lower reflector 62 faces the third laser sensor 53. The laser light emitted from the third laser sensor 53 is reflected by the reflector 62, and the third laser sensor 53 detects the laser light reflected by the reflector 62. In this case, the third laser sensor 53 is turned ON. The through-hole 63 of the detected part 60 faces the second laser sensor 52. As a result, the laser light emitted from the second laser sensor 52 is not reflected by the reflector 62, but passes through the through-hole 63 and reaches the second engagement vane 42, and is not reflected by the reflector 62. In this case, the second laser sensor 52 is in the OFF state.

[0050] In step S4, the first laser sensor 51 and the third laser sensor 53 are in the ON state, and the second laser sensor 52 is in the OFF state. In step S4, the elevator car 3 has landed on the destination floor and is positioned at the landing position. As described above, the landing position is allowed to be within a range of ±a / 2 relative to the floor level of the landing 11. Therefore, Figure 10 shows the cases where the floor level of the elevator car 3 is located a / 2 below the floor level of the landing 11, where it is located at the floor level of the landing 11, and where it is located a / 2 above the floor level of the landing 11.

[0051] When the first laser sensor 51 and the third laser sensor 53 are in the ON state and the second laser sensor 52 is in the OFF state, the door opening / closing control unit 10b drives a door drive unit (not shown) to open the car door 21 and the landing door 31.

[0052] (Step S5) When the car door 21 and landing door 31 close and the elevator car 3 rises, the upper reflector 62 no longer faces the first laser sensor 51. As a result, the laser light emitted from the first laser sensor 51 is not reflected by the reflector 62 and reaches the second engagement vane 42. In this case, the first laser sensor 51 is in the OFF state. On the other hand, the upper reflector 62 faces the second laser sensor 52. As a result, the laser light emitted from the second laser sensor 52 is reflected by the reflector 62, and the second laser sensor 52 detects the laser light reflected by the reflector 62. In this case, the second laser sensor 52 is in the ON state. The third laser sensor 53 also detects the laser light reflected by the lower reflector 62, and the ON state of the third laser sensor 53 is also maintained.

[0053] In step S5, as the elevator car 3 rises further, the through-hole 63 of the detection unit 60 faces the third laser sensor 53 (not shown). At this time, the laser light emitted from the third laser sensor 53 passes through the through-hole 63 and reaches the second engagement vane 42, and is not reflected by the reflector 62. In this case, the third laser sensor 53 is in the OFF state.

[0054] In step S5, as the elevator car 3 rises further, the reflector 62 positioned on the upper side faces the third laser sensor 53, as shown in Figures 13(a) and (b). As a result, the laser light emitted from the third laser sensor 53 is reflected by the reflector 62, and the third laser sensor 53 detects the laser light reflected by the reflector 62. In this case, the third laser sensor 53 turns ON. In step S5, it is determined that the elevator car 3 is located above the landing position in the range of 0 to L.

[0055] (Step S6) As the elevator car 3 rises further, the reflector 62 positioned on the upper side no longer faces the second laser sensor 52. As a result, the laser light emitted from the second laser sensor 52 does not reflect off the reflector 62 and reaches the second engagement vane 42. In this case, the second laser sensor 52 is in the OFF state. The third laser sensor 53 detects the laser light reflected off the reflector 62 positioned on the upper side, and the ON state of the third laser sensor 53 is maintained. In step S6, the second laser sensor 52 is in the OFF state, and it is determined that the elevator car 3 is located above the landing position in the range of L to 2L.

[0056] (Step S7) As the elevator car 3 rises further, the reflector 62 positioned on the upper side no longer faces the third laser sensor 53, as shown in Figures 14(a) and (b). As a result, the laser light emitted from the third laser sensor 53 is not reflected by the reflector 62 and reaches the second engagement vane 42. In this case, the third laser sensor 53 is turned OFF. In step S7, the first laser sensor 51, the second laser sensor 52, and the third laser sensor 53 are all in the OFF state, and it is determined that the elevator car 3 is located between floors.

[0057] The above explanation describes an example where elevator car 3, ascending towards an upper floor, lands at its destination floor and continues to ascend. Similarly, when elevator car 3, descending towards a lower floor, lands at its destination floor and continues to descend, the landing position can be detected in the same way, so a detailed explanation is omitted. Similarly, when elevator car 3, moving from its destination floor, reverses its direction of travel, the landing position can be detected in the same way, so a detailed explanation is omitted.

[0058] As described above, according to this embodiment, a first laser sensor 51, a second laser sensor 52, and a third laser sensor 53 are attached to a first engagement vane 41 for linking the car door 21 with the landing door 31. The detected unit 60 is positioned between the first engagement vane 41 and the second engagement vane 42 when the elevator car 3 is in the landing position. The detected unit 60 includes a pair of reflective parts 62 that reflect laser light emitted from the first laser sensor 51 and the third laser sensor 53 when the elevator car 3 is in the landing position, and a through hole 63 positioned between the pair of reflective parts 62 that allows laser light emitted from the second laser sensor 52 to pass through. This makes it possible to arrange the laser sensors 51-53 and the detected unit 60 that constitute the landing position detection system 50 by utilizing existing components that constitute the car door device 20 and the landing door device 30. This makes it possible to relax the layout restrictions of the landing position detection system 50.

[0059] Furthermore, according to this embodiment, the first laser sensor 51, the second laser sensor 52, and the third laser sensor 53 are attached to the first engagement vane 41, and the detection unit 60 is provided on the landing 11. This reduces the possibility of each laser sensor 51-53 and the detection unit 60 coming into contact with each other. Therefore, damage caused by contact between the laser sensors 51-53 and the detection unit 60 during an earthquake can be prevented, and the operation of the elevator car 3 can be prevented after an earthquake.

[0060] Furthermore, according to this embodiment, the first laser sensor 51, the second laser sensor 52, and the third laser sensor 53 are attached to the first engagement vane 41. This allows each of the laser sensors 51 to 53 to be inspected from the landing 11 by adjusting the position of the elevator car 3. Since the detected part 60 is located at the landing 11, the reflective part 62 of the detected part 60 can be inspected from the elevator car 3. This makes maintenance and inspection of the landing position detection system 50 easier. Also, as described above, existing components constituting the elevator car door device 20 and the landing door device 30 can be utilized. This makes it possible to reduce the cost of the landing position detection system 50.

[0061] Furthermore, according to this embodiment, the body 61 of the detected unit 60 includes a first facing surface 61a that faces the first engaging vane 41 and a second facing surface 61b that faces the second engaging vane 42. The reflective portion 62 is formed on the first facing surface 61a, and the through hole 63 extends from the first facing surface 61a to the second facing surface 61b. As a result, laser light emitted from laser sensors 51 to 53 facing the reflective portion 62 can be reflected by the reflective portion 62. Laser light emitted from laser sensors 51 to 53 facing the through hole 63 can pass through the through hole 63.

[0062] Furthermore, according to this embodiment, the reflective portion 62 has a higher light reflectivity than the first opposing surface 61a of the detection unit body 61. This makes it possible to increase the intensity of the laser light reflected by the reflective portion 62, thereby improving the detection accuracy of the landing position.

[0063] Furthermore, according to this embodiment, the detection unit 60 is attached to a hanger plate 34 provided on the landing door 31. This allows for the effective use of existing components and reduces the cost of the landing position detection system 50.

[0064] Furthermore, according to this embodiment, the detection unit 60 is positioned above the first engagement roller 45 and the second engagement roller 46, which are attached to the hanger plate 34 provided on the landing door 31. This allows for effective use of the available space in the landing door device 30. In addition, the reflective portion 62 of the detection unit 60 can be inspected from the elevator car 3, making maintenance and inspection work on the landing position detection system 50 easier.

[0065] Furthermore, according to this embodiment, when L is the distance from the landing position set to prevent the elevator car 3 from moving with its doors open, and the allowable error range of the landing position of the elevator car 3 is ±a / 2 from the floor level of the landing 11, the vertical dimension of the reflective part 62 is represented by L + a / 2, and the vertical dimension of the through hole 63 is represented by a. In this way, it is possible to detect whether or not the elevator car 3 is in a position where measures should be taken to prevent the elevator car 3 from moving up or down with its doors open, based on the state of the second laser sensor 52.

[0066] Furthermore, according to this embodiment, the first laser sensor 51 and the third laser sensor 53 detect the laser light reflected by the corresponding reflector 62, and when the intensity of the laser light detected by the second laser sensor 52 falls below the intensity of the laser light detected by the first laser sensor 51 and the third laser sensor 53, the car door 21 and the landing door 31 open. This allows for accurate detection of when the elevator car 3 is in the landing position, and the car door 21 and the landing door 31 can be opened in that state. Therefore, it is possible to prevent the car door 21 and the landing door 31 from opening when the elevator car 3 is not in the landing position.

[0067] Furthermore, according to this embodiment, if at least one of the first laser sensor 51 and the third laser sensor 53 does not detect laser light when the door is open, the elevator car 3 can be maintained in the landing position. Laser sensors 51 to 53 that do not detect laser light are highly likely to be malfunctioning, in which case it may become difficult to detect the landing position of the elevator car 3. This prevents the elevator car 3 from moving up or down if it is difficult to land in the landing position.

[0068] Furthermore, according to this embodiment, if the second laser sensor 52 does not detect laser light while the elevator car 3 is positioned between floors, one of the first laser sensor 51 and the third laser sensor 53 detects the laser light reflected by the corresponding reflector 62, and then the other detects the laser light reflected by the corresponding reflector 62, after which the elevator car 3 stops moving up or down. If the second laser sensor 52 does not detect laser light, there is a high possibility that the second laser sensor 52 is malfunctioning. Even in this case, for example, in step S4 shown in Figure 10, the third laser sensor 53 detects the laser light reflected by the reflector 62, thereby detecting that the elevator car 3 has reached the landing position. Therefore, the elevator car 3 can be brought to landing at the landing 11.

[0069] Furthermore, according to this embodiment, if at least one of the first laser sensor 51 and the third laser sensor 53 does not detect laser light while the elevator car 3 is positioned between floors, the second laser sensor 52 detects the laser light reflected by the corresponding reflector 62, and thereafter, the intensity of the laser light detected by the second laser sensor 52 decreases, thereby stopping the elevator car 3 from moving up or down. For example, in step S4 shown in Figure 10, the laser light emitted from the second laser sensor 52 passes through the through hole 63 without being reflected by the reflector 62, causing the intensity of the laser light detected by the second laser sensor 52 to decrease. This makes it possible to detect that the elevator car 3 has reached the landing position. Therefore, the elevator car 3 can be brought to landing at the landing 11.

[0070] According to the embodiments described above, the constraints on the layout can be relaxed.

[0071] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be implemented in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of Symbols]

[0072] 1: Elevator system, 3: Elevator car, 10a: Lifting control unit, 10b: Door opening / closing control unit, 11: Landing, 21: Car door, 31: Landing door, 34: Hanger plate, 41: First engaging vane, 42: Second engaging vane, 45: First engaging roller, 46: Second engaging roller, 48: Reinforcement plate, 49: Laser light hole, 50: Landing position detection system, 51: First laser sensor, 52: Second laser sensor, 53: Third laser sensor, 55: Notch, 56: Wiring, 57: Wiring hole, 60: Detected part, 61: Detected part body, 61a: First opposing surface, 61b: Second opposing surface, 62: Reflector, 63: Through hole

Claims

1. A first engaging vane is attached to the elevator car door to interlock the landing door, and a first laser sensor, a second laser sensor, and a third laser sensor are arranged in this order with spacing in the vertical direction, A detection unit installed at the boarding area, Equipped with, The first laser sensor, the second laser sensor, and the third laser sensor are configured to irradiate laser light toward the second engagement vane facing the first engagement vane and to detect the reflected laser light. The detection unit is positioned between the first engagement vane and the second engagement vane when the elevator car is in the landing position. The detected unit includes a pair of reflective sections that reflect laser light emitted from the first laser sensor and the third laser sensor when the elevator car is in the landing position, and a through-hole positioned between the pair of reflective sections, through which laser light emitted from the second laser sensor passes. Elevator landing position detection system.

2. The detected portion includes a body of the detected portion that extends in the vertical direction and is formed in a T-shape when viewed in the vertical direction. The detected unit body includes a first opposing surface facing the first engaging vane and a second opposing surface facing the second engaging vane, The reflective portion is formed on the first opposing surface, The through hole extends from the first opposing surface to the second opposing surface. The elevator landing position detection system according to claim 1.

3. The detected portion includes a body of the detected portion that extends in the vertical direction and is formed in a T-shape when viewed in the vertical direction. The detected unit body includes a first opposing surface facing the first engaging vane and a second opposing surface facing the second engaging vane, The reflective portion is formed on the first opposing surface, The reflective portion has a higher light reflectivity than the first opposing surface. The elevator landing position detection system according to claim 1 or 2.

4. The detected unit is attached to a hanger plate provided on the landing door. The elevator landing position detection system according to claim 1 or 2.

5. The detected part is an engagement roller attached to a hanger plate provided on the landing door, and is positioned above the engagement roller with which one of the first engagement vane and the second engagement vane abuts when the car door and the landing door are opened and closed. The elevator landing position detection system according to claim 1 or 2.

6. Let L be the distance from the landing position set to prevent the elevator car from traveling with its doors open, and let the allowable error range of the landing position of the elevator car be within ±a / 2 from the floor level of the landing. Then, the vertical dimension of the reflective part is set to L + a / 2, and the vertical dimension of the through hole is set to a. The elevator landing position detection system according to claim 1.

7. An elevator landing position detection system according to claim 1 or 2, A door opening / closing control unit that controls the opening and closing of the car door and the landing door, Equipped with, The door opening / closing control unit opens the car door and the landing door when the first laser sensor and the third laser sensor detect the laser light reflected by the corresponding reflector, and when the intensity of the laser light detected by the second laser sensor falls below the intensity of the laser light detected by the first laser sensor and the third laser sensor. Elevator system.

8. An elevator landing position detection system according to claim 1 or 2, A lifting control unit that controls the raising and lowering of the elevator car, Equipped with, The lifting control unit maintains the elevator car in the landing position when the door is open and at least one of the first laser sensor and the third laser sensor does not detect laser light. Elevator system.

9. An elevator landing position detection system according to claim 1 or 2, A lifting control unit that controls the raising and lowering of the elevator car, Equipped with, If the elevator car is positioned between floors and the second laser sensor does not detect laser light, the elevator control unit stops the elevator car from moving up or down after one of the first laser sensor and the third laser sensor detects laser light reflected by the corresponding reflector, and then the other sensor detects laser light reflected by the corresponding reflector. Elevator system.

10. An elevator landing position detection system according to claim 1 or 2, A lifting control unit that controls the raising and lowering of the elevator car, Equipped with, If at least one of the first laser sensor and the third laser sensor does not detect laser light while the elevator car is positioned between floors, the elevator control unit will stop the elevator car from moving up or down after the second laser sensor detects the laser light reflected by the corresponding reflector, and after the intensity of the laser light detected by the second laser sensor decreases. Elevator system.

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