Safety device for elevator doors

Abstract

Provided is a safety device for an elevator door capable of expanding the detection range of the lower portion of the door shoe. The safety device for the elevator door includes an upper end device provided at the upper end of a door shoe provided at a first car door of an elevator, and a lower end device provided at the lower end of the door shoe, which forms a light beam between the upper end device along the end surface of the door shoe, the lower end device including a light guide provided below the door shoe and changing the direction of travel of the received light beam toward the vertical upper direction.

Description

Technical Field

[0001] This invention relates to safety devices for elevator doors. Background Technology

[0002] Patent document 1 discloses a safety device for an elevator door, which includes an optical axis sensor installed in the door shoe of the elevator.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 3-098984 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] However, the lower end of the optical axis sensor described in Patent Document 1 is located several hundred millimeters above the ground. Therefore, the detection range at the bottom of the door shoe is reduced by a corresponding amount.

[0008] This invention was made to solve the aforementioned problems. The object of this invention is to provide a safety device for elevator doors that can expand the detection range of the lower part of the door shoe.

[0009] Methods for solving problems

[0010] The safety device for an elevator door of the present invention comprises: an upper end device disposed at the upper end of a door shoe disposed on the first car door of an elevator; and a lower end device disposed at the lower end of the door shoe, forming a light beam between the lower end device and the upper end device along the end face of the door shoe, the lower end device comprising a light guide disposed below the door shoe, and changing the direction of travel of the received light beam to vertically upward.

[0011] Invention Effects

[0012] According to the present invention, a light guide is provided at the lower end, which is disposed below the door shoe and changes the direction of travel of the received light beam to vertically upward. Therefore, the safety device of the elevator door can expand the detection range of the lower part of the door shoe. Attached Figure Description

[0013] Figure 1 This is a diagram showing the elevator door of Embodiment 1.

[0014] Figure 2 This is a diagram showing the lower end device of the safety device for the elevator door according to Embodiment 1.

[0015] Figure 3 This is a diagram showing the lower end device and guide aid of the safety device for the elevator door according to Embodiment 1.

[0016] Figure 4 This diagram illustrates the difference in elevator doors of Embodiment 1 depending on whether or not they have a first light-shielding component.

[0017] Figure 5 This is a diagram showing the first anti-reflective component when the elevator door of Embodiment 1 is closing.

[0018] Figure 6 This is a diagram showing the second anti-reflective component when the elevator door of Embodiment 1 is closing.

[0019] Figure 7 This is a variation of the set of optical axis sensors for the elevator door in Embodiment 1.

[0020] Figure 8 This is a variation of the placement of the elevator door guide aids in Implementation Method 1.

[0021] Figure 9 This is a variation of the elevator door in Implementation Method 1.

[0022] Figure 10 This is a diagram showing the elevator door of Embodiment 2.

[0023] Figure 11 It is the lower end device of the elevator door in Embodiment 2.

[0024] Figure 12 It is the reflective component of the elevator door in Embodiment 2.

[0025] Figure 13 This is a modified example of the prism of the safety device for the elevator door in Embodiment 2.

[0026] Figure 14 This is a first variation of the lower end device of the elevator door in Embodiment 2.

[0027] Figure 15 This is a second variation of the lower end device of the elevator door in Embodiment 2.

[0028] Figure 16 This is a third variation of the lower end device of the elevator door in Embodiment 2.

[0029] Figure 17 This is a diagram showing the elevator door of embodiment 3.

[0030] Figure 18 This is a diagram showing the lower end device of the elevator door according to Embodiment 3.

[0031] Figure 19 This is a top view of the elevator door in Embodiment 3, viewed from the vertical direction. Detailed Implementation

[0032] The embodiments for carrying out the invention will be described with reference to the accompanying drawings. Furthermore, in the drawings, identical or equivalent parts are labeled with the same reference numerals. Repetitive descriptions of these parts have been appropriately simplified or omitted.

[0033] Implementation method 1.

[0034] Figure 1 This is a diagram showing the elevator car door of Embodiment 1.

[0035] The car, not shown, is located inside a shaft, also not shown. The direction of entry and exit is defined by the direction of entry and exit of the car. Figure 1 In the diagram, the direction of entry into the ladder indicates the direction from the front side of the page towards the inside. The direction of exiting the ladder indicates the direction from the inside side of the page towards the front side.

[0036] Car doors 1a and 1b are located at the entrance / exit of the car (not shown). Car doors 1a and 1b open and close by moving horizontally. One direction is defined as the right-hand side of the horizontal plane. The other direction is defined as the left-hand side of the horizontal plane.

[0037] For example, the door shoe 2 is equipped with a multi-optical-axis sensor projector. For example, the door shoe 2 has multiple projection sections in the length direction, which transmit optical axes. The door shoe 2 has a leading edge 2a and a trailing edge 2b.

[0038] Door shoe 2 is disposed on car door 1a. Door shoe 2 is configured to protrude toward one side of car door 1a. For example, door shoe 2 is configured to illuminate the optical axis of a multi-axis sensor onto car door 1b.

[0039] The leading edge 2a refers to the region of the edge and surface located in one direction within the door shoe 2. For example, the leading edge 2a may have multiple light-emitting parts of a multi-axis sensor.

[0040] The trailing edge 2b represents the region of the edge and face in the door shoe 2 located in another direction.

[0041] For example, the multi-axis sensor receiver 3 is disposed on the car door 1b. For example, the multi-axis sensor receiver 3 is disposed on the other side of the car door 1b. For example, the multi-axis sensor receiver 3 is configured to receive multiple optical axes of the multi-axis sensor.

[0042] The multi-axis sensor receiver 3 receives multiple optical axes from the multi-axis sensor projector. For example, the multi-axis sensor receiver 3 can send an obstacle detection signal even if it does not receive any of the multiple optical axes. The multi-axis sensor includes a multi-axis sensor projector and a multi-axis sensor receiver 3 installed on the door boot 2.

[0043] For example, controller 4 has a control mechanism that uses circuitry inside. For example, controller 4 is located on the upper part of the car (not shown). For example, controller 4 controls the opening and closing of car door 1a and car door 1b via a car door drive device (not shown).

[0044] For example, the controller 4 is electrically connected to the multi-axis sensor receiver 3. For example, when the controller 4 receives a detection signal of an obstacle during the closing action of the car door, it performs the opening action of the car door 1a and the car door 1b.

[0045] A set of optical axis sensors 30a includes an upper device 31a and a lower device 33a. The set of optical axis sensors 30a is detachably mounted on the door shoe 2. For example, the set of optical axis sensors 30a forms a light beam 50a between the upper device 31a and the lower device 33a. The set of optical axis sensors 30a forms an optical axis 50 between the upper device 31a and the lower device 33a. The optical axis 50 is defined as the region with the highest beam density in the cross-section of the light beam 50a formed by the set of optical axis sensors 30a. That is, the light beam 50a includes the optical axis 50. For example, the set of optical axis sensors 30a forms the optical axis 50 near the leading edge 2a.

[0046] For example, the upper device 31a has a cuboid shape. The upper device 31a has an upper light-passing surface 32a. For example, the upper device 31a has a light receiver 35a.

[0047] The upper device 31a is disposed on the upper surface of the door shoe 2. The upper device 31a is configured such that the upper light-passing surface 32a becomes the lower surface. The upper device 31a is configured such that the upper light-passing surface 32a protrudes from the door shoe 2 towards the front edge 2a. For example, the upper device 31a is electrically connected to the controller 4.

[0048] For example, the upper device 31a receives the optical axis 50 after passing through the upper light-passing surface 32a. For example, if the upper device 31a does not receive the optical axis 50, it sends an obstacle detection signal to the controller 4.

[0049] The lower end device 33a has a lower light-passing surface 34a. For example, the lower end device 33a has a projector 36a.

[0050] The lower end device 33a is disposed on the lower surface of the door shoe 2. The lower end device 33a is configured such that the lower light-passing surface 34a faces upward. The lower end device 33a is configured such that the lower light-passing surface 34a protrudes from the door shoe 2 towards the front edge 2a. The lower end device 33a is configured such that the lower light-passing surface 34a is inclined in a vertically downward direction as it faces one direction.

[0051] For example, the lower device 33a causes the optical axis 50 to be transmitted through the lower light transmission surface 34a.

[0052] The first light-shielding member 10 is disposed at the leading edge 2a. For example, the first light-shielding member 10 blocks a portion of the area near the leading edge 2a in the optical axis 50.

[0053] The first anti-reflective component 11 is provided on the car door 1b. The first anti-reflective component 11 is provided on the side of the car door 1b in the direction of elevator entry. For example, the first anti-reflective component 11 is provided at the center in the vertical direction of the car door 1b.

[0054] The first anti-reflection component 11 suppresses stray light reflections from the side of the car door 1b in the direction of elevator entry. The stray light refers to the area in the light beam 50a that has deviated from the optical axis 50.

[0055] For example, the second anti-reflective component 12 is disposed in the multi-axis sensor receiver 3. For example, the second anti-reflective component 12 is disposed on the side of the multi-axis sensor receiver 3 in another direction. For example, the second anti-reflective component 12 is disposed at the center of the multi-axis sensor receiver 3 in the vertical direction.

[0056] The second anti-reflection component 12 suppresses stray light from being reflected by the multi-axis sensor receiver 3.

[0057] For example, the guide aid 13 has an inclined surface. The guide aid 13 is disposed at the lower end of the car door 1b. The guide aid 13 is disposed on the other side of the car door 1b. The guide aid 13 is configured such that the inclined surface slopes downwards as it faces the other direction. For example, the guide aid 13 is configured such that its lower surface is as close as possible to the car floor (not shown).

[0058] For example, the elevator door safety device 100 includes a car door 1a, a car door 1b, a door shoe 2, a multi-axis optical sensor, a controller 4, a first light-shielding component 10, a first anti-reflective component 11, a second anti-reflective component 12, a guide aid 13, and a set of optical axis sensors 30a. For example, the safety device 100 prevents people and objects from being trapped by the car door by performing the actions described below.

[0059] If a user (not shown) crosses the car entrance / exit during the period from the start of the closing action to the completion of the closing action of the car doors 1a and 1b, any optical axis of the multi-axis sensor will be blocked by the user. In this case, any light-receiving part of the multi-axis sensor's light receiver 3 will not detect the optical axis.

[0060] If no optical axis is detected by any of the light-receiving parts of the multi-axis sensor light receiver 3, the multi-axis sensor light receiver 3 sends an obstacle detection signal to the controller 4.

[0061] The controller 4 receives a detection signal indicating an obstacle. Then, the controller 4 opens the car doors 1a and 1b. Therefore, the safety device 100 prevents the user from being trapped between the car doors 1a and 1b.

[0062] For example, if the rope comes into contact with the leading edge 2a of the door shoe 2 during the period from the start of the closing action to the completion of the closing action of the car doors 1a and 1b, the optical axis 50 will be blocked by the rope. In this case, the upper device 31a will not detect the optical axis 50.

[0063] If the upper device 31a does not detect the optical axis 50, the upper device 31a sends an obstacle detection signal to the controller 4.

[0064] The controller 4 receives a detection signal indicating an obstacle. Then, the controller 4 opens the car doors 1a and 1b. Therefore, for example, the safety device 100 prevents the rope from getting caught between car doors 1a and 1b.

[0065] Next, use Figure 2 The lower light-passing surface 34a of the lower end device 33a will be described.

[0066] Figure 2 This is a diagram showing the lower end device of the safety device for the elevator door according to Embodiment 1.

[0067] like Figure 2 As shown, the lower end device 33a is configured such that the lower light-passing surface 34a is inclined relative to the horizontal direction.

[0068] The optical axis 50 is formed to pass through the lower light-passing surface 34a.

[0069] For example, the lower light-passing surface 34a is set to have an inclination sufficient to suppress the accumulation of trash 61. For example, it is assumed that trash 61 is dust, dirt, thread ends, etc.

[0070] Next, use Figure 3 The function of the inclined surface of the guide aid 13 and the lower light-passing surface 34a when the car doors 1a and 1b are closed will be explained.

[0071] Figure 3 This is a diagram showing the lower end device and guide aid of the safety device for the elevator door according to Embodiment 1.

[0072] like Figure 3 As shown, the guide aid 13 is installed on the car door 1b with its inclined surface tilted relative to the horizontal direction.

[0073] For example, when the car door 1a and car door 1b are closed, if the rope 60 is located near the car floor (not shown), the inclined surface of the guide aid 13 pushes the rope 60 upward during the closing action. For example, the lower light-passing surface 34a pushes the rope 60 upward during the closing action.

[0074] Then, rope 60 moves to a position that blocks the optical axis 50. Therefore, safety device 100 detects the presence of rope 60 near the car floor.

[0075] Next, use Figure 4 The function of the first light-shielding component 10 will be explained.

[0076] Figure 4 This diagram illustrates the difference in elevator doors of Embodiment 1 depending on whether or not they have a first light-shielding component.

[0077] Figure 4 Figure A is a diagram illustrating the safety device 100 of Embodiment 1. Figure 4 As shown, for example, when the rope 60 contacts the door boot 2, the rope 60 may bend in one direction and deform into a mountain shape, using both ends of the leading edge 2a as fulcrums. For example, the first light-shielding member 10 is configured to protrude from the leading edge 2a by the same width as the gap between the bent rope 60 and the leading edge 2a. For example, the first light-shielding member 10 is configured to block the optical axis 50 using the bent rope 60 and the first light-shielding member 10.

[0078] Figure 4 Figure B shows a safety device 100 without the first light-shielding member 10 as a comparative example. In the comparative example, the bent rope 60 only blocks a portion of the optical axis 50. The unblocked area of ​​the optical axis 50 is detected by the upper device 31a. Therefore, the upper device 31a does not send an obstacle detection signal.

[0079] Next, use Figure 5 The first anti-reflective component 11 will be described.

[0080] Figure 5 This is a diagram showing the first anti-reflective component when the elevator door of Embodiment 1 is closing.

[0081] Figure 5 Figure A is a diagram illustrating the safety device 100 of Embodiment 1. Figure 5 As shown in Figure A, for example, the first anti-reflective component 11 is disposed at the vertical center of the car door 1b. For example, the first anti-reflective component 11 is configured not to obstruct the operation of the multi-axis sensor receiver 3. The first anti-reflective component 11 suppresses the reflection of the first stray light portion 51 at the car door 1b. The first stray light portion 51 is the region at the exit direction end of the beam 50a.

[0082] Figure 5 Figure B shows a safety device 100 without the first anti-reflection component 11, serving as a comparative example. In the comparative example, for example, the first stray light component 51 is reflected at the car door 1b. The upper device 31a detects the reflected first stray light component 51. Therefore, regardless of the presence or absence of an obstacle, the upper device 31a does not send an obstacle detection signal.

[0083] Next, use Figure 6 The second anti-reflective component 12 will be described.

[0084] Figure 6 This is a diagram showing the second anti-reflective component when the elevator door of Embodiment 1 is closing.

[0085] exist Figure 6 For example, the second anti-reflection member 12 is disposed at the vertical center of the multi-axis sensor photodetector 3. For example, when the distance between the door boot 2 and the multi-axis sensor photodetector 3 becomes closer due to the closing action, the second anti-reflection member 12 suppresses the reflection of the second stray light portion 52, which is the horizontal end of the beam 50a, from the multi-axis sensor photodetector 3.

[0086] According to Embodiment 1 described above, the elevator door includes a car door 1a as a first car door and a car door 1b as a second car door. A set of optical axis sensors 30a includes an upper device 31a and a lower device 33a. The upper device 31a is located at the upper end of the door shoe 2. The lower device 33a is located at the lower end of the door shoe 2. The lower device 33a forms a light beam 50a between itself and the upper device 31a. When the set of optical axis sensors 30a sends a detection signal indicating an obstacle, the safety device 100 moves the car door 1a and car door 1b in the opening direction. The lower device 33a includes a lower light-passing surface 34a through which the light beam 50a passes. The lower light-passing surface 34a is configured to tilt vertically downwards as it moves away from the door shoe 2. Therefore, the lower light-passing surface 34a can push the rope 60 upwards during the closing action. As a result, the safety device 100 is able to detect rope-like obstacles near the ground. Furthermore, the lower light-transmitting surface 34a can suppress the accumulation of trash 61 on the upper surface.

[0087] Furthermore, the upper device 31a includes a light receiver 35a, and the lower device 33a includes a light projector 36a. A set of optical axis sensors 30a forms a light beam 50a and an optical axis 50 from the lower device 33a toward the upper device 31a. Therefore, the light beam 50a converges downwards. As a result, the safety device 100 can improve its ability to detect obstacles present below.

[0088] Furthermore, a light receiver 35a can be provided below the optical axis sensor 30a. A light projector 36a can also be provided above the optical axis sensor 30a. That is, the upper device 31a provides the light projector 36a, and the lower device 33a provides the light receiver 35a. In this case, the lower device 33a sends an obstacle detection signal to the controller 4. As a result, the safety device 100 can improve its ability to detect obstacles present above it.

[0089] Furthermore, the upper device 31a and the lower device 33a are detachably mounted on the door shoe 2. As a result, the safety device 100 improves the workability of maintaining and servicing the set of optical axis sensors 30a.

[0090] Furthermore, the door boot 2 is equipped with a multi-axis sensor projector. The multi-axis sensor receiver 3 is disposed opposite to the multi-axis sensor projector on the car door 1b. That is, the safety device 100 is equipped with a multi-axis sensor. Therefore, the safety device 100 can detect obstacles without contacting them.

[0091] Furthermore, a first light-shielding member 10 is provided on the door boot 2. The first light-shielding member 10 blocks a portion of the area near the leading edge 2a of the light beam 50a. Therefore, the first light-shielding member 10 is able to block a portion of the optical axis 50 passing through when the rope 60 bends. As a result, the safety device 100 is able to improve the detection accuracy of obstacles.

[0092] Furthermore, the first anti-reflective component 11 is provided on the side of the car door 1b in the direction of entering the elevator. That is, the first anti-reflective component 11 is provided on the side of the car door 1b in the direction of the car's interior. Therefore, the first anti-reflective component 11 can suppress the reflection of the first stray light portion 51 in the direction of exiting the elevator at the car door 1b. As a result, the safety device 100 can improve the accuracy of obstacle detection.

[0093] Furthermore, the second anti-reflective component 12 is disposed on the side of the multi-axis sensor receiver 3 opposite to the door shoe 2. Therefore, the second anti-reflective component 12 can suppress the reflection of the second stray light portion 52 in the horizontal direction at the multi-axis sensor receiver 3. As a result, the safety device 100 can improve the detection accuracy of obstacles.

[0094] Furthermore, a guide aid 13 is provided at the lower end of the car door 1b. The guide aid 13 is configured such that its inclined surface tilts vertically downwards as it faces another direction. Therefore, the guide aid 13 can push the rope 60 upwards during the closing action. As a result, the safety device 100 can improve its detection capability of the rope 60 located below.

[0095] Next, use Figure 7A modified example of the light receiver 35a and the light projector 36a of a set of optical axis sensors 30a will be described.

[0096] Figure 7 This is a variation of the optical axis sensor 30a for the elevator door in Embodiment 1.

[0097] like Figure 7 As shown, in a modified example of the optical axis sensor 30a in Embodiment 1, the upper device 31a includes a light receiver 35a and a light projector 36a. The lower device 33a includes a reflector 37a. For example, the lower light-passing surface 34a includes a reflector 37a.

[0098] For example, reflector 37a has a surface with light-reflecting properties. Reflector 37a causes the light to be reflected on the surface in the direction in which the light is incident.

[0099] The upper device 31a emits an optical axis 50 from its projector 36a. The optical axis 50 is then reflected at the lower device 33a. The reflected optical axis 53 is received by the upper device's receiver 35a. The reflected optical axis 53 is the optical axis 50 after being reflected at the lower device 33a.

[0100] According to a variation of the optical axis sensor 30a of Embodiment 1 described above, the upper device 31a includes a light receiver 35a and a light projector 36a. The lower device 33a includes a reflector 37a. The optical axis 50 emitted from the upper device 31a is reflected at the lower device 33a. The reflected optical axis 53 is received by the light receiver 35a of the upper device 31a. Therefore, the lower device 33a can be miniaturized compared to the lower device 33a of Embodiment 1. Furthermore, a set of optical axis sensors 30a can detect obstacles using the light beam 50a and the reflected optical axis 53. Therefore, the safety device 100 can improve the accuracy of obstacle detection.

[0101] Alternatively, the door shoe 2 can be mechanical. For example, the car door 1a is opened by moving the door shoe 2 relative to the car door 1a in the closing direction.

[0102] Next, use Figure 8 A variation of the placement of the guide aid 13 will be explained.

[0103] Figure 8 This is a variation of the placement of the elevator door guide aids in Implementation Method 1.

[0104] like Figure 8 As shown, the guide aid 13 is disposed at the lower end of the car door 1b. The guide aid 13 is positioned in the area of ​​the groove in the car sill. When the car door 1b moves, the guide aid 13 moves in the area of ​​the groove in the car sill.

[0105] The lower part of the car door 1a (not shown) has a cutout (not shown). This cutout allows the guide aid 13 to be stored inside when both car doors 1a and 1b are fully closed.

[0106] In a variation of the guide aid's placement in Embodiment 1 described above, the lower part of the guide aid 13 exists in the groove area of ​​the car sill. When the car door 1b moves, the guide aid 13 moves within the groove area of ​​the car sill. Therefore, the guide aid 13 can push obstacles in contact with the ground upwards. As a result, the safety device 100 can improve its obstacle detection capability.

[0107] In addition, the guide aid 13 can be installed not only on the car door 1b, but also on the car door 1a.

[0108] For example, the safety device 100 includes two guide aids 13. One of the two guide aids 13 is located at the car door 1b. Figure 8 The other of the two guide aids 13 (not shown) is located on one side of the lower end of the car door 1a. The other guide aid 13 is configured such that its inclined surface tilts vertically in one direction. The other guide aid 13 is positioned so that it does not physically interfere with the other guide aid 13 when both car doors 1a and 1b are fully closed.

[0109] Therefore, the two guiding aids 13 can push obstacles located below upwards. As a result, the safety device 100 can improve its ability to detect obstacles located below.

[0110] Next, use Figure 9 An example of the installation of the safety device 100 in the single-door configuration will be explained.

[0111] Figure 9 This is a variation of the elevator door in Implementation Method 1.

[0112] like Figure 9 As shown, the elevator door is a single-opening type. For example, the elevator door is a 2S type. The elevator door has a car door 1c and a door stop 5.

[0113] The car door 1c is located at the entrance / exit of the car (not shown). The car door 1c opens and closes by moving horizontally. The car door 1c is equipped with a door shoe 2. In the fully closed state, one end of the car door 1c is retracted into the receiving space of the elevator door.

[0114] For example, door stop 5 is a rod-shaped component. For example, door stop 5 is connected to the car via a door stop post. Door stop 5 is disposed in a receiving space. Door stop 5 is positioned opposite the car door 1c. For example, when the car door 1c is fully closed, door stop 5 contacts the door shoe 2.

[0115] For example, the door shoe 2 is equipped with a multi-optical axis sensor projector. For example, the door shoe 2 has multiple projecting sections in the length direction, and the projecting sections transmit optical axes.

[0116] The door shoe 2 is configured to protrude toward one side of the car door 1c. For example, the door shoe 2 is configured to irradiate the optical axis of the multi-axis sensor illuminating the door stop 5.

[0117] For example, the multi-axis sensor receiver 3 is disposed on the door stop 5. For example, the multi-axis sensor receiver 3 is disposed on the other side of the door stop 5. For example, the multi-axis sensor receiver 3 is configured to receive multiple optical axes of the multi-axis sensor.

[0118] One set of optical axis sensors 30a includes an upper device 31a and a lower device 33a. The set of optical axis sensors 30a is detachably mounted on the door shoe 2.

[0119] The first anti-reflective component 11 is disposed in the direction of entry into the accommodating space on the side of the car. The first anti-reflective component 11 is disposed on the opposite side from the door stop 5. For example, the first anti-reflective component 11 is disposed at the same height as the vertical center of the car door 1c.

[0120] For example, the second anti-reflective component 12 is disposed in the multi-axis sensor receiver 3. For example, the second anti-reflective component 12 is disposed on the side of the multi-axis sensor receiver 3 in another direction. For example, the second anti-reflective component 12 is disposed at the center of the multi-axis sensor receiver 3 in the vertical direction.

[0121] The guide aid 13 is provided at the lower end of the door stop 5 with its inclined surface tilted relative to the horizontal direction. For example, the guide aid 13 is provided on the other side of the door stop 5. The guide aid 13 is configured such that the inclined surface tilts vertically downwards as it faces the other direction. For example, the guide aid 13 is configured such that its lower part exists in the area of ​​the car sill (not shown). For example, the guide aid 13 is configured such that the inclined surface exists in a part of the car entrance / exit. For example, when the car door 1c is fully closed, the guide aid 13 is housed in a cutout provided in the lower part of the car door 1c.

[0122] In a variation of the elevator door described in Embodiment 1 above, the elevator door includes a door stop 5. A first anti-reflective member 11 is provided in the direction of entry into the receiving space on the side of the car. Therefore, the first anti-reflective member 11 can suppress... Figure 9The first stray light portion 51, not shown in the diagram, reflects off the side of the car. As a result, the safety device 100 can improve the accuracy of obstacle detection.

[0123] Furthermore, the second anti-reflective component 12 is disposed on the side of the multi-axis sensor receiver 3 opposite to the door shoe 2. Therefore, the second anti-reflective component 12 can suppress the reflection of the second stray light portion 52 in the horizontal direction at the multi-axis sensor receiver 3. As a result, the safety device 100 can improve the detection accuracy of obstacles.

[0124] Furthermore, a guide aid 13 is disposed at the lower end of the door stop 5. The guide aid 13 is configured such that its inclined surface tilts vertically downwards as it faces another direction. Therefore, the guide aid 13 can, during the closing action, remove obstacles... Figure 9 The rope 60 (not shown) is pushed upwards. As a result, the safety device 100 can improve the detection capability of the rope 60 located below.

[0125] Alternatively, the door shoe 2 can also be mechanical. For example, the car door 1c is opened by moving the door shoe 2 relative to the car door 1c in the closing direction. In the case where the door shoe 2 is mechanical, the second anti-reflective component 12 is provided on the door stop 5.

[0126] In addition, the guide aid 13 can be installed not only on the door stop 5, but also on the car door 1c.

[0127] For example, the safety device 100 includes two guide aids 13. One of the two guide aids 13 is disposed on the door stop 5. Figure 9 The other of the two guide aids 13 (not shown) is located on one side of the lower end of the car door 1c. The other guide aid 13 is configured such that its inclined surface tilts vertically in one direction. The other guide aid 13 is positioned so that it does not physically interfere with the other guide aid 13 when the car door 1c is fully closed.

[0128] Therefore, the two guiding aids 13 can push obstacles located below upwards. As a result, the safety device 100 can improve its ability to detect obstacles located below.

[0129] Implementation method 2.

[0130] Figure 10 This diagram shows the elevator door according to Embodiment 2. Furthermore, parts that are identical or equivalent to those in Embodiment 1 are labeled with the same reference numerals. Descriptions of these parts are omitted.

[0131] like Figure 10As shown, the safety device 100 includes a set of optical axis sensors 30b. The set of optical axis sensors 30b includes an upper device 31b and a lower device 33b. The set of optical axis sensors 30b forms a light beam 50a between the upper device 31b and the lower device 33b. The set of optical axis sensors 30b forms an optical axis 50 between the upper device 31b and the lower device 33b.

[0132] For example, the upper device 31b has the same structure as the upper device 31a in Embodiment 1.

[0133] The lower device 33b includes a lower light-passing surface 34b, a light projector 36b, and a light guide 40.

[0134] For example, the lower end device 33b is disposed on the lower surface of the door shoe 2. For example, the lower end device 33b is connected to the lower surface and the rear edge 2b of the door shoe 2. The lower end device 33b is configured such that the lower light-passing surface 34b faces upward. For example, the lower end device 33b is configured such that the lower light-passing surface 34b has an angle of 45 degrees or more relative to the horizontal plane.

[0135] For example, the projector 36b is connected to the trailing edge 2b.

[0136] For example, the light guide 40 is located below the door shoe 2. For example, the light guide 40 is connected to the lower light transmission surface 34b. The light guide 40 changes the direction of travel of the received light beam 50a vertically upward.

[0137] Next, use Figure 11 The projector 36b and the light guide 40 of the lower device 33b will be described.

[0138] Figure 11 It is the lower end device of the elevator door in Embodiment 2.

[0139] like Figure 11 As shown, the projector 36b is connected to the trailing edge 2b. For example, the projector 36b projects a beam of light 50a in a vertically downward direction.

[0140] For example, the light guide 40 includes a lens 41 and a reflective component 42. The light guide 40 is located below the door shoe 2.

[0141] For example, lens 41 is a convex lens. Lens 41 is configured with a convex surface opposite to the projector 36b. For example, the optical axis of lens 41 is configured to coincide with the optical axis 50. For example, lens 41 is configured with its focal point aligned with the light source of projector 36b.

[0142] For example, the reflecting component 42 has a prism. The reflecting component 42 allows light to pass through its interior. The reflecting component 42 changes the direction of light travel by reflecting the light on its inner wall.

[0143] For example, the reflecting member 42 is disposed inside the lower end device 33b. For example, the other end of the reflecting member 42 is disposed below the lens 41. For example, one end of the reflecting member 42 is connected to the lower light-passing surface 34b. The reflecting member 42 is configured to direct the optical axis 50 directly upward.

[0144] The light beam 50a emitted from the projector 36b passes through the lens 41, the reflector 42, and the lower light-passing surface 34b. Then, the light beam 50a is emitted from the lower end device 33b.

[0145] The projector 36b emits a beam 50a in a vertically downward direction. The projector 36b emits the beam 50a radially.

[0146] The light beam 50a enters the lens 41. For example, the light beam 50a is collimated by the lens 41. "Collimated" is defined as making the angles of multiple light rays consistent and parallel. Therefore, the light beam 50a exits the lens 41 in a parallel downward direction. Then, the light beam 50a enters the reflecting element 42.

[0147] The beam 50a changes its direction of travel inside the reflecting member 42. The beam 50a travels towards the forward edge 2a inside the reflecting member 42. Then, the beam 50a travels vertically upwards. The beam 50a is emitted vertically upwards from the reflecting member 42.

[0148] The light beam 50a passes through the lower light-passing surface 34b and is emitted vertically upward from the lower end device 33b.

[0149] Next, use Figure 12 The shape of the prism provided by the light guide 40 of the optical axis sensor 30b is described.

[0150] Figure 12 It is the light guide for the elevator door in implementation method 2.

[0151] like Figure 12 As shown, for example, the reflective component 42 includes a prism 42a.

[0152] Prism 42a has a trapezoidal shape. Prism 42a has two equal base angles. For example, the lower base of prism 42a has a base angle θ. b .

[0153] Prism 42a is configured such that its upper and lower bases are parallel to the horizontal direction. Prism 42a is configured such that the optical axis 50 enters from the waist on one side of the direction. Prism 42a is configured such that the optical axis 50 exits from the waist on the other side of the direction.

[0154] The optical axis 50 enters prism 42a at an incident angle θ1. The optical axis 50 exits prism 42a at an exit angle θ2. In... Figure 10The two base angles shown are equal, θ. b In this case, the exit angle θ2 does not depend on the refractive index of prism 42a, but on the incident angle θ1. For example, the exit angle θ2 is equal to the incident angle θ1 regardless of the refractive index of prism 42a.

[0155] According to Embodiment 2 described above, the elevator door includes a car door 1a as a first car door. The elevator door also includes a car door 1b as a second car door. A set of optical axis sensors 30b includes an upper device 31b and a lower device 33b. The upper device 31b is located at the upper end of the door shoe 2. The lower device 33b is located at the lower end of the door shoe 2. The lower device 33b forms a light beam 50a between itself and the upper device 31b. When the set of optical axis sensors 30b sends a detection signal indicating an obstacle, the safety device 100 moves the car door 1a and car door 1b in the opening direction. The lower device 33b includes a light guide 40. The light guide 40 is located below the door shoe 2. The light guide 40 changes the direction of travel of the received light beam 50a towards the vertical upward direction. Therefore, the projector 36b can be located outside the vicinity of the leading edge 2a of the door shoe 2. That is, the protruding part of the lower device 33b can be miniaturized. The door shoe 2 can be positioned further down. As a result, the safety device 100 can expand the detection range of the lower part of the door shoe.

[0156] Furthermore, the upper device 31b includes a light receiver 35b, and the lower device 33b includes a light projector 36b. A set of optical axis sensors 30b forms a light beam 50a and an optical axis 50 from the lower device 33b toward the upper device 31b. Therefore, the light beam 50a converges downwards. As a result, the safety device 100 can improve its ability to detect obstacles present below.

[0157] Furthermore, the light guide 40 is configured to protrude from the door shoe 2 towards the trailing edge 2b. A projector 36b is disposed at the trailing edge 2b. The projector 36b is configured to send a beam 50a in a vertically downward direction. Therefore, in the lower end device 33b, the area located below the door shoe 2 can be reduced. As a result, the safety device 100 can expand the detection range of the door shoe 2.

[0158] Furthermore, the lower end device 33b is configured such that the lower light-passing surface 34b has an angle of 45 degrees or more relative to the horizontal plane. Therefore, when the travel direction of the beam 50a changes in the vertical direction, the beam 50a converges in the horizontal direction. The width of the beam 50a in the horizontal direction narrows. As a result, the safety device 100 is able to improve its obstacle detection capability.

[0159] Furthermore, the light guide 40 includes a prism 42a. The prism 42a can change the direction of travel of the light beam 50a by reflecting it onto the inner wall. Therefore, the projector 36b can be positioned away from being directly below the receiver 35b. As a result, the safety device 100 can reduce the size of the area protruding towards the forward edge in the lower end device 33b.

[0160] Furthermore, prism 42a has a trapezoidal cross-section with two equal base angles. Optical axis 50 passes through one and the other sides of this trapezoid. Therefore, the deflection angle of prism 42a along optical axis 50 does not depend on the refractive index of prism 42a. The deflection angle of prism 42a is determined by the angle of incidence incident on prism 42a. As a result, safety device 100 can maintain the position of optical axis 50 constant regardless of changes in refractive index caused by temperature variations.

[0161] Furthermore, the light guide 40 includes a lens 41. The lens 41 has the shape of a convex lens. The lens 41 is positioned opposite the projector 36b. The lens 41 is set to have its focal point aligned with the light source of the projector 36b. Therefore, the light beam 50a is collimated by the lens 41. As a result, the safety device 100 is able to suppress stray light from the light beam 50a.

[0162] Furthermore, the lower end device 33b includes a lower light-passing surface 34b. The lower light-passing surface 34b allows the light beam 50a to pass through. The lower light-passing surface 34b is configured to tilt vertically downwards as it moves away from the door shoe 2. Therefore, the lower light-passing surface 34b can push the rope 60 upwards during the closing action. Additionally, the lower light-passing surface 34b can prevent the accumulation of debris 61 on the upper surface.

[0163] Next, use Figure 13 A variation of the shape of prism 42a will be explained.

[0164] Figure 13 This is a modified example of the prism of the safety device for the elevator door in Embodiment 2.

[0165] like Figure 13 As shown, for example, prism 42a has a hexagonal shape. Prism 42a has an angle θ. c The two opposite angles. Prism 42a has an angle θ on its bottom edge. d The two adjacent corners.

[0166] The optical axis 50 enters the prism 42a at an incident angle θ1. The optical axis 50 at angle θ... c Angle and angle θ d The two sides between the angles are reflected into the interior of prism 42a. The optical axis 50 exits from prism 42a at an exit angle θ2.

[0167] In the modified example of the prism in Embodiment 2 described above, the exit angle θ2 depends not on the refractive index of the prism 42a, but on the incident angle θ1. For example, the exit angle θ2 is equal to the incident angle θ1 regardless of the refractive index of the prism 42a. As a result, the safety device 100 can maintain the position of the optical axis 50 constant regardless of the change in refractive index caused by temperature changes.

[0168] Next, use Figure 14 A first modified example of the lower end device 33b of a set of optical axis sensors 30b will be described.

[0169] Figure 14 This is a first variation of the lower end device of the elevator door in Embodiment 2.

[0170] like Figure 14 As shown, in the first modification, the lower device 33b includes a projector 36b and a light guide 40.

[0171] The projector 36b is connected to the trailing edge 2b. For example, the projector 36b projects a beam of light 50a in a vertically downward direction.

[0172] The light guide 40 has a prism 43 with a lens-shaped surface.

[0173] The prism 43 with a lens-shaped surface has a curved surface 43a and an exit surface 43b. For example, the prism 43 with a lens-shaped surface is configured such that the curved surface 43a faces the light projector 36b. For example, the prism 43 with a lens-shaped surface is configured such that the light source of the light projector 36b is located at the focal point of the curved surface 43a. For example, the prism 43 with a lens-shaped surface is configured such that the exit surface 43b is located below the lower light-passing surface 34b.

[0174] Surface 43a has a convex shape.

[0175] The beam 50a enters the prism 43 with a lens surface at the curved surface 43a. For example, the beam 50a is collimated at the curved surface 43a. Then, the beam 50a passes through the interior of the prism 43 with a lens surface and exits from the exit surface 43b.

[0176] According to the first variation of Embodiment 2 described above, the light guide 40 includes a prism 43 with a lens-shaped surface. The prism 43 with the lens-shaped surface has a convex surface. The prism 43 with the lens-shaped surface is configured to face the projector 36b with a convex surface. The prism 43 with the lens-shaped surface changes the direction of travel of the optical axis 50 by internally reflecting the optical axis 50. Therefore, the light guide 40 can collimate the light beam 50a. As a result, the safety device 100 can suppress stray light from the light beam 50a.

[0177] Next, use Figure 15A second modification of the lower end device 33b of the optical axis sensor 30b will be described.

[0178] Figure 15 This is a second variation of the lower end device of the elevator door in Embodiment 2.

[0179] like Figure 15 As shown, in the second variation, the lower device 33b includes a projector 36b and a light guide 40.

[0180] The projector 36b is connected to the trailing edge 2b. The projector 36b projects a beam 50a in a horizontal direction.

[0181] For example, the light guide 40 has a prism 43 with a lens surface.

[0182] For example, the prism 43 with a lens-shaped surface has a curved surface 43a and an exit surface 43b. For example, the prism 43 with a lens-shaped surface is configured such that the curved surface 43a is opposite to the light projector 36b. For example, the prism 43 with a lens-shaped surface is configured such that the light source of the light projector 36b is located at the focal point of the curved surface 43a. For example, the prism 43 with a lens-shaped surface is configured such that the exit surface 43b is located below the lower light-passing surface 34b.

[0183] For example, surface 43a has a convex shape.

[0184] The beam 50a enters the prism 43 with a lens surface at the curved surface 43a. For example, the beam 50a is collimated at the curved surface 43a. Then, the beam 50a passes through the interior of the prism 43 with a lens surface and exits from the exit surface 43b.

[0185] Alternatively, the light guide 40 may not have a prism 43 with a curved lens surface. For example, the light guide 40 may have a prism without a curved surface.

[0186] According to the second variation of Embodiment 2 described above, the projector 36b is connected to the trailing edge 2b. The projector 36b emits a beam 50a that travels horizontally toward the guide beam 40. Therefore, the lower end device 33b may not have the projector 36b located below the door shoe 2. The portion of the lower end device 33b located below the door shoe 2 can be miniaturized. As a result, the door shoe 2 can be positioned at a lower location.

[0187] Next, use Figure 16 A third modified example of the lower end device 33b of a set of optical axis sensors 30b will be described.

[0188] Figure 16 This is a third variation of the lower end device of the elevator door in Embodiment 2.

[0189] like Figure 16As shown, in the third variation, the lower device 33b includes a projector 36b and a light guide 40.

[0190] The projector 36b is positioned below the door shoe 2. For example, the projector 36b projects a beam of light 50a in one direction.

[0191] For example, the light guide 40 has a prism 43 with a lens surface.

[0192] The prism 43 with a lens-shaped surface has a curved surface 43a and an exit surface 43b. For example, the prism 43 with a lens-shaped surface is configured such that the curved surface 43a faces the light projector 36b. For example, the prism 43 with a lens-shaped surface is configured such that the light source of the light projector 36b is located at the focal point of the curved surface 43a. For example, the prism 43 with a lens-shaped surface is configured such that the exit surface 43b is located below the lower light-passing surface 34b.

[0193] For example, surface 43a has a convex shape.

[0194] The beam 50a enters the prism 43 with a lens surface at the curved surface 43a. For example, the beam 50a is collimated at the curved surface 43a. Then, the beam 50a passes through the interior of the prism 43 with a lens surface and exits from the exit surface 43b.

[0195] According to the third variation of Embodiment 2 described above, the projector 36b is disposed below the door boot 2. The projector 36b transmits a light beam 50a toward the light guide 40. The projector 36b transmits the light beam 50a in a horizontal direction. Therefore, the projector 36b can be disposed in a location that is not directly below the light receiver 35b. As a result, the safety device 100 can reduce the size of the area protruding towards the forward edge in the lower end device 33b.

[0196] Alternatively, the light guide 40 may not have a prism 43 with a curved lens surface. For example, the light guide 40 may have a prism without a curved surface. For example, the light guide 40 may have a reflector.

[0197] Implementation method 3.

[0198] Figure 17 This diagram shows the elevator door according to Embodiment 3. Furthermore, parts that are identical or equivalent to those in Embodiment 1 or Embodiment 2 are labeled with the same reference numerals. Descriptions of these parts are omitted.

[0199] like Figure 17 As shown, the safety device 100 includes a set of optical axis sensors 30c, a first anti-reflective component 11, and a second light-shielding component 14. The set of optical axis sensors 30c includes an upper device 31c and a lower device 33c.

[0200] A set of optical axis sensors 30c forms a light beam 50a between the upper device 31c and the lower device 33c. A set of optical axis sensors 30c forms an optical axis 50 between the upper device 31c and the lower device 33c. For example, a set of optical axis sensors 30c forms an optical axis 50 near the leading edge 2a. For example, a set of optical axis sensors 30c forms an optical axis 50 along the end face of the door shoe. For example, a set of optical axis sensors 30c forms an optical axis 50 relative to the leading edge 2a in the exit direction and in one direction.

[0201] For example, the upper device 31c has a cuboid shape. The upper device 31c has an upper light-passing surface 32c. For example, the upper device 31c has a light receiver 35c.

[0202] The upper device 31c is disposed on the upper surface of the door shoe 2. The upper device 31c is configured to protrude from the door shoe 2 in the direction of exiting the ladder. The upper device 31c is configured such that the upper light-passing surface 32c protrudes from the door shoe 2 in the direction of the front edge 2a. The upper device 31c is configured such that the upper light-passing surface 32a becomes the lower surface. For example, the upper device 31c is electrically connected to a controller 4 (not shown).

[0203] For example, the upper device 31c receives the optical axis 50 after passing through the upper light-passing surface 32c. For example, if the upper device 31c does not receive the optical axis 50, it sends an obstacle detection signal to the controller 4 (not shown).

[0204] The lower end device 33c is disposed on the side of the door shoe 2 in the direction of exiting the ladder. The lower end device 33c is disposed below the door shoe 2. The lower end device 33c is configured such that the optical axis 50 passes through the lower light transmission surface 34c.

[0205] For example, the lower device 33c causes the optical axis 50 to be transmitted through the lower light transmission surface 34c.

[0206] For example, the second light-shielding member 14 has a cuboid shape. For example, the length of the second light-shielding member 14 in the in-and-out direction is equal to the length of the lower end device 33c in the in-and-out direction.

[0207] The second light-shielding member 14 is disposed on the side of the door shoe 2 in the direction of exiting the ladder. The second light-shielding member 14 is disposed between the upper light-passing surface 32c and the lower light-passing surface 34c. For example, the side of the second light-shielding member 14 in one direction is disposed on the same plane as the leading edge 2a. For example, the second light-shielding member 14 blocks a portion of the area on the other side of the light axis 50.

[0208] Next, use Figure 18 The structure of the lower device 33c will be described.

[0209] Figure 18 This is a diagram showing the lower end device of the elevator door according to Embodiment 3.

[0210] like Figure 18 As shown, the lower device 33c includes a lower light-passing surface 34c, a light projector 36c, and a light guide 40.

[0211] The projector 36c includes a mounting section 62, a mold 63, a substrate 64, and a light source 65. For example, the projector 36c is disposed in the opposite direction of the door shoe 2.

[0212] Mounting part 62 is located in the opposite direction of door shoe 2. One end of mounting part 62 is connected to the rear edge 2b.

[0213] For example, the cross-section of mold 63 has a shape that is linearly symmetrical in the horizontal direction.

[0214] The mold 63 is located in the opposite direction of the door shoe 2. The side of the mold 63 in the direction of the ladder entrance is connected to the other end of the mounting part 62.

[0215] For example, substrate 64 has circuitry for emitting light from light source 65. Substrate 64 is disposed inside mold 63.

[0216] The light source 65 is connected to the substrate 64. The light source 65 emits light under the control of the substrate 64.

[0217] For example, the light guide 40 includes a lens 41 and a reflective component 42. The light guide 40 is disposed on the side of the door shoe 2 in the direction of exiting the ladder. One end of the light guide 40 is connected to the lower light-passing surface 34c. The other end of the light guide 40 is connected to the projector 36c.

[0218] For example, lens 41 is a convex lens. Lens 41 is configured with a convex surface opposite to the projector 36c. For example, the optical axis of lens 41 is configured to coincide with the optical axis 50. For example, lens 41 is configured with its focal point aligned with the light source of projector 36c.

[0219] For example, the reflecting component 42 has a prism. The reflecting component 42 allows light to pass through its interior. The reflecting component 42 changes the direction of light travel by reflecting the light on its inner wall.

[0220] For example, the reflecting member 42 is disposed on the side of the door shoe 2 in the direction of entry and exit. For example, the end of the reflecting member 42 in another direction is opposite to the lens 41. For example, the end of the reflecting member 42 in one direction is connected to the lower light transmission surface 34c. The reflecting member 42 is configured to direct the optical axis 50 directly upward.

[0221] Next, use Figure 19 The situation regarding the safety device 100 and the detection rope 60 is explained.

[0222] Figure 19 This is a top view of the elevator door in Embodiment 3, viewed from the vertical direction.

[0223] like Figure 19 As shown, for example, when the car door 1a and car door 1b are closed while the rope 60 is crossing the entrance / exit of the car (not shown), the door shoe 2 comes into contact with the rope 60.

[0224] For example, the second light-shielding member 14 is in contact with the rope 60. Therefore, the optical axis 50 is blocked by the second light-shielding member 14 and the rope 60. The light receiver 35c (not shown) does not detect the optical axis 50. The light receiver 35c sends an obstacle detection signal to the controller 4 (not shown).

[0225] According to Embodiment 3 described above, a set of optical axis sensors 30c includes an upper device 31c and a lower device 33c. The upper device 31c is disposed at the upper end of the door shoe 2. The lower device 33c is disposed on the side of the door shoe 2 in the exit direction. The set of optical axis sensors 30c forms a light beam 50a between the upper device 31c and the lower device 33c. The set of optical axis sensors 30c forms the light beam 50a along the end face of the door shoe 2. Therefore, the safety device 100 can be equipped with a set of optical axis sensors 30c without replacing the door shoe 2. As a result, the elevator door safety device 100 can use the existing door shoe 2 to form the light beam 50a. In addition, the safety device 100 can be equipped with a set of optical axis sensors 30c at low cost.

[0226] Furthermore, the upper device 31c includes a light receiver 35c, and the lower device 33c includes a light projector 36c. A set of optical axis sensors 30c forms a light beam 50a and an optical axis 50 from the lower device 33c toward the upper device 31c. Therefore, the light beam 50a converges downwards. As a result, the safety device 100 can improve its ability to detect obstacles present below.

[0227] Furthermore, the lower device 33c includes a light guide 40. The light guide 40 changes the direction of the light beam 50a from the horizontal to the vertical. Therefore, the lower device 33c can position the projector 36c in a position that is not directly below the receiver 35c.

[0228] Furthermore, a second light-shielding member 14 is provided on the side of the door shoe 2 in the direction of exiting the ladder. The second light-shielding member 14 is configured to block part of the light axis 50. Therefore, the safety device 100 can improve the detection accuracy of the rope 60 in contact with the door shoe 2.

[0229] Furthermore, in Embodiment 2 or Embodiment 3, the safety device 100 can be applied regardless of the type of car door. For example, similar to Embodiment 1, the safety device 100 can be used in a single-door elevator. For example, the safety device 100 can be used in a double-door elevator.

[0230] Furthermore, in Embodiment 2 or Embodiment 3, the lens 41 is not limited to a convex lens as long as it has the function of collimating the optical axis 50. For example, the lens 41 is a collimating lens.

[0231] Alternatively, in Embodiment 2 or Embodiment 3, the light guide 40 may not include the lens 41. For example, if the projector 36c has a highly directional light source, the light guide 40 may not include the lens 41. Specifically, the highly directional light source is a light source using a projectile-type LED element, a laser light source, etc.

[0232] Industrial availability

[0233] As described above, the elevator door safety device of the present invention can be used in elevator systems.

[0234] Label Explanation

[0235] 1a, 1b, 1c: Car door; 2: Door shoe; 2a: Leading edge; 2b: Rear edge; 3: Multi-axis optical sensor receiver; 4: Controller; 5: Door stop; 10: First light-shielding component; 11: First anti-reflective component; 12: Second anti-reflective component; 13: Guide aid; 14: Second light-shielding component; 30a, 30b, 30c: Optical axis sensor; 31a, 31b, 31c: Upper device; 32a, 32c: Upper light transmission surface; 33a, 33b, 33c: Lower device; 34a, 34b, 34c : Lower light transmission surface; 35a, 35b, 35c: Light receiver; 36a, 36b, 36c: Light projector; 37a: Reflector; 40: Light guide; 41: Lens; 42: Reflecting component; 42a: Prism; 43: Prism with lens curved surface; 43a: Curved surface; 43b: Exit surface; 50: Optical axis; 51: First stray light section; 52: Second stray light section; 53: Reflected optical axis; 60: Rope; 61: Trash; 62: Mounting part; 63: Mold; 64: Substrate; 65: Light source; 100: Safety device.

Claims

1. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; and A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe between itself and the upper end device. The upper device is equipped with a light receiver to receive the light beam. The lower end device includes: A light projector that transmits the light beam; and A light guide, positioned below the door shoe, alters the direction of the received light beam upwards. The light guide includes a prism that alters the direction of the light beam by reflecting it off the inner wall. The safety device of the elevator door includes a first anti-reflective component, which is disposed on the side of the second car door facing the interior of the car, opposite the first car door.

2. The safety device for elevator doors according to claim 1, wherein, The projector is positioned below the door shoe and emits a beam of light that travels horizontally toward the light guide.

3. The safety device for elevator doors according to claim 1, wherein, The projector is connected to the rear edge of the door shoe and emits the light beam that travels horizontally toward the light guide.

4. The safety device for elevator doors according to claim 1, wherein, The light guide is configured to protrude toward the rear edge of the door shoe. The projector is disposed on the surface of the door shoe in the direction of the rear edge and emits the light beam that travels vertically downward toward the light guide.

5. The safety device for elevator doors according to any one of claims 2 to 4, wherein, The prism has a trapezoidal cross-section with two equal base angles, and is configured such that the light beam passes through one side and the other side of the trapezoid.

6. The safety device for elevator doors according to any one of claims 2 to 4, wherein, The light guide has a convex lens, which is set to have a focal point that coincides with the light source of the projector.

7. The safety device for elevator doors according to any one of claims 2 to 4, wherein, The prism is a prism with a lens surface, which has a convex surface opposite to the projector and changes the direction of the beam by internally reflecting the beam.

8. The safety device for elevator doors according to any one of claims 1 to 4, wherein, The lower device has a lower light-passing surface that allows the light beam to pass through and tilts downward as it moves away from the door shoe.

9. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; and A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe between itself and the upper end device. The upper device is equipped with a light receiver to receive the light beam. The lower end device includes: A light projector that transmits the light beam; and A light guide, positioned below the door shoe, alters the direction of the received light beam upwards. The light guide includes a prism that alters the direction of the light beam by reflecting it off the inner wall. The safety device of the elevator door includes a second anti-reflective component, which is disposed in a second car door opposite to the first car door, or in a door stop opposite to the first car door, on the surface opposite to the door shoe.

10. The safety device for an elevator door according to claim 9, wherein, The projector is positioned below the door shoe and emits a beam of light that travels horizontally toward the light guide.

11. The safety device for an elevator door according to claim 9, wherein, The projector is connected to the rear edge of the door shoe and emits the light beam that travels horizontally toward the light guide.

12. The safety device for an elevator door according to claim 9, wherein, The light guide is configured to protrude toward the rear edge of the door shoe. The projector is disposed on the surface of the door shoe in the direction of the rear edge and emits the light beam that travels vertically downward toward the light guide.

13. The safety device for an elevator door according to any one of claims 10 to 12, wherein, The prism has a trapezoidal cross-section with two equal base angles, and is configured such that the light beam passes through one side and the other side of the trapezoid.

14. The safety device for an elevator door according to any one of claims 10 to 12, wherein, The light guide has a convex lens, which is set to have a focal point that coincides with the light source of the projector.

15. The safety device for an elevator door according to any one of claims 10 to 12, wherein, The prism is a prism with a lens surface, which has a convex surface opposite to the projector and changes the direction of the beam by internally reflecting the beam.

16. The safety device for an elevator door according to any one of claims 9 to 12, wherein, The lower device has a lower light-passing surface that allows the light beam to pass through and tilts downward as it moves away from the door shoe.

17. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; and A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe between itself and the upper end device. The lower end device includes: A light guide, disposed below the door shoe, alters the direction of travel of the received light beam towards vertically upwards; and The lower light-passing surface allows the light beam to pass through and tilts downwards as it moves away from the door shoe. The safety device detects an obstacle that is pushed upwards by the lower light as the first car door closes. The safety device of the elevator door includes a first anti-reflective component, which is disposed on the side of the second car door facing the interior of the car, opposite the first car door.

18. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; and A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe between itself and the upper end device. The lower end device includes: A light guide, disposed below the door shoe, alters the direction of travel of the received light beam towards vertically upwards; and The lower light-passing surface allows the light beam to pass through and tilts downwards as it moves away from the door shoe. The safety device detects an obstacle that is pushed upwards by the lower light as the first car door closes. The safety device of the elevator door includes a second anti-reflective component, which is disposed in a second car door opposite to the first car door, or in a door stop opposite to the first car door, on the surface opposite to the door shoe.

19. The safety device for an elevator door according to claim 1, 9, 17 or 18, wherein, The upper and lower devices are detachably mounted on the door boot.

20. The safety device for an elevator door according to claim 1, 9, 17 or 18, wherein, The elevator door safety device includes: A multi-axis optical sensor projector, which is disposed on the door shoe; and A multi-axis sensor receiver is disposed on a second car door opposite to the first car door and opposite to the multi-axis sensor projector.

21. The safety device for an elevator door according to claim 1, 9, 17 or 18, wherein, The safety device of the elevator door includes a first light-shielding component, which is disposed at the front edge of the door shoe and blocks a portion of the light beam.

22. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe and between it and the upper end device; and A first light-shielding component is disposed at the front edge of the door shoe and blocks a portion of the light beam from the lower device toward the upper device. The lower device includes a light guide, which is disposed below the door shoe and changes the direction of travel of the received light beam to vertically upward. The safety device of the elevator door includes a first anti-reflective component, which is disposed on the side of the second car door facing the interior of the car, opposite the first car door.

23. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe and between it and the upper end device; and A first light-shielding component is disposed at the front edge of the door shoe and blocks a portion of the light beam from the lower device toward the upper device. The lower device includes a light guide, which is disposed below the door shoe and changes the direction of travel of the received light beam to vertically upward. The safety device of the elevator door includes a second anti-reflective component, which is disposed in a second car door opposite to the first car door, or in a door stop opposite to the first car door, on the surface opposite to the door shoe.

24. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe and between it and the upper end device; and The first anti-reflective component is disposed on the side of the second car door, which is opposite to the first car door, in the direction of the car's interior. The lower device includes a light guide located below the door shoe, which changes the direction of the received light beam upwards.

25. A safety device for an elevator door, wherein, The elevator door safety device includes: The upper device is located at the upper end of the door shoe installed on the first car door of the elevator; A lower end device, disposed at the lower end of the door shoe, forms a light beam along the end face of the door shoe and between it and the upper end device; and The second anti-reflective component is disposed in the second car door opposite the first car door, or in the door stop opposite the first car door, on the surface opposite the door shoe. The lower device includes a light guide located below the door shoe, which changes the direction of the received light beam upwards.

26. The safety device for an elevator door according to any one of claims 1, 9, 17, 18, 22-25, wherein, The safety device of the elevator door includes a guide aid with an inclined surface, which is disposed at the lower end of the second car door opposite the first car door or at the lower end of the door stop opposite the first car door, such that the inclined surface tilts downward as it approaches the first car door.

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