WO2021240596A1

WO2021240596A1 - Elevator door safety device

Info

Publication number: WO2021240596A1
Application number: PCT/JP2020/020526
Authority: WO
Inventors: 陽介齋藤; 昌也北澤; 敬太望月; 和宏渡辺; 慎也天野
Original assignee: 三菱電機株式会社
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-12-02
Also published as: CN115551796A; JP6992933B1; DE112020007235T5; JPWO2021240596A1

Abstract

Provided is an elevator door safety device capable of detecting a string-shaped obstacle near a floor. This elevator door safety device comprises: an upper end device that is installed at the upper end of a door shoe on the first car door of an elevator; and a lower end device that is installed at the lower end of the door shoe and forms a light beam between the upper end device and the lower end device along the end face of the door shoe. The lower end device is equipped with a lower light passage surface, which allows the light beam to pass through and inclines downward with distance from the door shoe.

Description

Elevator door safety device

This disclosure relates to elevator door safety devices.

Patent Document 1 discloses a safety device for an elevator door provided with an optical axis sensor provided on the door shoe of the elevator.

Japanese Patent Application Laid-Open No. 3-098984

However, the lower end device of the optical axis sensor described in Patent Document 1 is provided several hundred mm above the floor surface. For this reason, it is difficult to detect an obstacle existing near the floor surface, such as a lead string for pets.

This disclosure was made to solve the above-mentioned problems. An object of the present disclosure is to provide a safety device for an elevator door that can detect a string-shaped obstacle near the floor surface.

The elevator door safety device according to the present disclosure includes an upper end device provided at the upper end of the door shoe provided on the first car door of the elevator, and the upper end device provided at the lower end of the door shoe along the end surface of the door shoe. The lower end device comprises a lower end device for forming a light beam between the and the lower end device, the lower end device provided with a lower light passage surface provided to incline downward as the light beam passes through and away from the door shoe.

According to the present disclosure, the lower end device of the optical axis sensor includes a lower light passage surface provided so that the light beam passes through and tilts downward as it moves away from the door shoe. Therefore, the elevator door safety device can detect a string-shaped obstacle near the floor surface.

It is a figure which shows the elevator door in Embodiment 1. FIG. It is a figure which shows the lower end device of the safety device of an elevator door in Embodiment 1. FIG. It is a figure which shows the lower end device and the guide jig of the safety device of an elevator door in Embodiment 1. FIG. It is a figure which shows the difference by the presence / absence of the 1st light-shielding member of the elevator door in Embodiment 1. FIG. It is a figure which shows the 1st antireflection member at the time of closing operation of an elevator door in Embodiment 1. FIG. It is a figure which shows the 2nd antireflection member at the time of closing operation of an elevator door in Embodiment 1. FIG. It is a modification of a set of optical axis sensors of an elevator door in Embodiment 1. This is a modified example of the installation position of the guide jig for the elevator door in the first embodiment. It is a modification of the elevator door in Embodiment 1. It is a figure which shows the elevator door in Embodiment 2. FIG. This is the lower end device for the elevator door according to the second embodiment. It is a reflective material of an elevator door in the second embodiment. This is a modification of the prism of the elevator door safety device according to the second embodiment. This is a first modification of the lower end device of the elevator door in the second embodiment. This is a second modification of the lower end device of the elevator door in the second embodiment. This is a third modification of the lower end device of the elevator door in the second embodiment. It is a figure which shows the elevator door in Embodiment 3. FIG. It is a figure which shows the lower end device of an elevator door in Embodiment 3. FIG. It is a top view seen from the vertical upper direction of the elevator door in Embodiment 3. FIG.

The mode for carrying out this disclosure will be described according to the attached drawings. In each figure, the same or corresponding parts are designated by the same reference numerals. The duplicate description of the relevant part will be simplified or omitted as appropriate.

Embodiment 1.
FIG. 1 is a diagram showing a car door of an elevator according to the first embodiment.

A car not shown is provided inside a hoistway not shown. The boarding / alighting direction is defined as the direction of boarding / alighting from the car. In FIG. 1, the riding direction represents a direction from the front side to the back side of the paper. The descending direction represents the direction from the back side of the paper to the front side.

The car door 1a and the car door 1b are provided at the entrance and exit of a car (not shown). The car door 1a and the car door 1b open and close by moving in the horizontal direction. One direction is defined as the right side of the paper in the horizontal direction. The other direction is defined as the left side of the paper in the horizontal direction.

For example, the door shoe 2 includes a multi-optical axis sensor floodlight. For example, the door shoe 2 includes a plurality of light projecting portions that emit light axes in the longitudinal direction. The door shoe 2 includes a leading edge 2a and a trailing edge 2b.

The door shoe 2 is provided on the car door 1a. The door shoe 2 is provided so as to project in one direction of the car door 1a. For example, the door shoe 2 is provided so as to irradiate the car door 1b with the optical axis of the multi-optical axis sensor.

The leading edge 2a is an area representing a side and a surface located in one direction in the door shoe 2. For example, the leading edge 2a includes a plurality of light projecting portions of the multi-optical axis sensor.

The trailing edge 2b is a region of the door shoe 2 that represents sides and surfaces located in other directions.

For example, the multi-optical axis sensor receiver 3 is provided on the car door 1b. For example, the multi-optical axis sensor receiver 3 is provided on the other side of the car door 1b. For example, the multi-optical axis sensor receiver 3 is provided so as to receive a plurality of optical axes of the multi-optical axis sensor.

The multi-optical axis sensor receiver 3 receives a plurality of optical axes of the multi-optical axis sensor floodlight. For example, when the multi-optical axis sensor receiver 3 does not receive any of the optical axes of the plurality of optical axes, the multi-optical axis sensor receiver 3 transmits a detection signal with an obstacle. The multi-optical axis sensor includes a multi-optical axis sensor floodlight provided on the door shoe 2 and a multi-optical axis sensor receiver 3.

For example, the controller 4 includes a control mechanism using an electronic circuit inside. For example, the controller 4 is provided on the upper part of a car (not shown). For example, the controller 4 controls the opening / closing operation of the car door 1a and the car door 1b via a car door driving device (not shown).

For example, the controller 4 is electrically connected to the multi-optical axis sensor receiver 3. For example, when the controller 4 receives an obstacle detection signal during the closing operation of the car door, the controller 4 opens the car door 1a and the car door 1b.

A set of optical axis sensors 30a includes an upper end device 31a and a lower end device 33a. A set of optical axis sensors 30a is detachably provided on the door shoe 2. For example, a set of optical axis sensors 30a forms an optical beam 50a between the upper end device 31a and the lower end device 33a. A set of optical axis sensors 30a forms an optical axis 50 between the upper end device 31a and the lower end device 33a. The optical axis 50 is defined as a region having the highest luminous flux density in the cross section of the optical beam 50a formed by the set of optical axis sensors 30a. That is, the light beam 50a includes the optical axis 50. For example, a set of optical axis sensors 30a forms an optical axis 50 in the vicinity of the leading edge 2a.

For example, the upper end device 31a has a rectangular parallelepiped shape. The upper end device 31a includes an upper light passage surface 32a. For example, the upper end device 31a includes a light receiver 35a.

The upper end device 31a is provided on the upper surface of the door shoe 2. The upper end device 31a is provided so that the upper light passage surface 32a is on the lower surface. The upper end device 31a is provided so that the upper light passing surface 32a protrudes from the door shoe 2 in the direction of the leading edge 2a. For example, the upper end device 31a is electrically connected to the controller 4.

For example, the upper end device 31a receives the optical axis 50 that has passed through the upper optical communication surface 32a. For example, when the upper end device 31a does not receive the optical axis 50, the upper end device 31a transmits a detection signal with an obstacle to the controller 4.

The lower end device 33a includes a lower light passage surface 34a. For example, the lower end device 33a includes a floodlight 36a.

The lower end device 33a is provided on the lower surface of the door shoe 2. The lower end device 33a is provided so that the lower light passage surface 34a faces upward. The lower end device 33a is provided so that the lower light passage surface 34a protrudes from the door shoe 2 in the direction of the leading edge 2a. The lower end device 33a is provided so that the lower light passage surface 34a is inclined vertically downward in one direction.

For example, the lower end device 33a transmits the optical axis 50 through the lower optical passage surface 34a.

The first light-shielding member 10 is provided on the leading edge 2a. For example, the first light-shielding member 10 blocks a part of the optical axis 50 near the leading edge 2a.

The first antireflection member 11 is provided on the car door 1b. The first antireflection member 11 is provided on the side surface of the car door 1b in the riding direction. For example, the first antireflection member 11 is provided at the center of the car door 1b in the vertical direction.

The first antireflection member 11 suppresses the stray light portion from reflecting on the side surface of the car door 1b in the riding direction. The stray light portion represents a region of the light beam 50a that is distant from the optical axis 50.

For example, the second antireflection member 12 is provided on the multi-optical axis sensor receiver 3. For example, the second antireflection member 12 is provided on the side surface in the other direction in the multi-optical axis sensor receiver 3. For example, the second antireflection member 12 is provided at the center of the multi-optical axis sensor receiver 3 in the vertical direction.

The second antireflection member 12 suppresses the stray light portion from being reflected by the multi-optical axis sensor receiver 3.

For example, the guidance jig 13 includes an inclined surface. The guidance jig 13 is provided at the lower end of the car door 1b. The guidance jig 13 is provided on the other side of the car door 1b. The guide jig 13 is provided so that the inclined surface is inclined vertically downward toward the other direction. For example, the guidance jig 13 is provided so that the lower surface is as close as possible to the car floor (not shown).

For example, the elevator door safety device 100 includes a car door 1a, a car door 1b, a door shoe 2, a multi-optical axis sensor, a controller 4, a first light-shielding member 10, a first antireflection member 11, and a second antireflection member 12. A guidance jig 13 and a set of optical axis sensors 30a are provided. For example, the safety device 100 suppresses a person and an object from being pinched by the car door by performing the following operations.

If a user (not shown) crosses the doorway of the car between the start and completion of the closing operation of the

car doors

1a and 1b, any optical axis of the multi-optical axis sensor is blocked by the user. Be done. In this case, any of the light receiving units of the multi-optical axis sensor receiver 3 does not detect the optical axis.

When any of the light receiving units of the multi-optical axis sensor receiver 3 does not detect the optical axis, the multi-optical axis sensor receiver 3 transmits a detection signal with an obstacle to the controller 4.

The controller 4 receives a detection signal with an obstacle. After that, the controller 4 opens the car door 1a and the car door 1b. Therefore, the safety device 100 prevents the user from being sandwiched between the car door 1a and the car door 1b.

For example, if the string comes into contact with the leading edge 2a of the door shoe 2 between the start and the completion of the closing operation of the

car doors

1a and 1b, the optical axis 50 is blocked by the string. In this case, the upper end device 31a does not detect the optical axis 50.

When the upper end device 31a does not detect the optical axis 50, the upper end device 31a transmits a detection signal with an obstacle to the controller 4.

The controller 4 receives a detection signal with an obstacle. After that, the controller 4 opens the car door 1a and the car door 1b. Therefore, for example, the safety device 100 prevents the string from being pinched between the car door 1a and the car door 1b.

Next, the lower light passage surface 34a of the lower end device 33a will be described with reference to FIG.
FIG. 2 is a diagram showing a lower end device of the elevator door safety device according to the first embodiment.

As shown in FIG. 2, the lower end device 33a is provided so that the lower light passage surface 34a is inclined with respect to the horizontal direction.

The optical axis 50 is formed by passing through the lower optical passage surface 34a.

For example, the lower light passage surface 34a is provided with an inclination that suppresses the accumulation of dust 61. For example, the dust 61 is assumed to be dust, dirt, lint, or the like.

Next, with reference to FIG. 3, the action of the inclined surface of the guiding jig 13 and the lower light passing surface 34a when the

car doors

1a and 1b are closed will be described.
FIG. 3 is a diagram showing a lower end device and a guidance jig of the elevator door safety device according to the first embodiment.

As shown in FIG. 3, the guidance jig 13 is provided on the car door 1b so that the inclined surface is inclined with respect to the horizontal direction.

For example, when the car door 1a and the car door 1b are in a position close to the car floor (not shown) when the car door 1b is closed, the inclined surface of the guide jig 13 raises the string 60 with the closing operation. Push up in the direction. For example, the lower optical passage surface 34a pushes up the string 60 upward with the closing operation.

After that, the string 60 is moved to a position that blocks the optical axis 50. Therefore, the safety device 100 detects the string 60 existing at a position close to the car floor.

Next, the operation of the first light-shielding member 10 will be described with reference to FIG.
FIG. 4 is a diagram showing a difference between the presence and absence of the first light-shielding member of the elevator door in the first embodiment.

A of FIG. 4 is a diagram showing the safety device 100 of the first embodiment. As shown in FIG. 4, for example, when the string 60 comes into contact with the door shoe 2, the string 60 may be deformed into a mountain-shaped shape in one direction by bending with both ends of the leading edge 2a as fulcrums. .. For example, the first light-shielding member 10 is provided so as to project from the leading edge 2a by the same width as the gap between the bent string 60 and the leading edge 2a. For example, the first light-shielding member 10 is provided so that the optical axis 50 can be shielded by the bent string 60 and the first light-shielding member 10.

FIG. 4B is a diagram showing a safety device 100 not provided with the first light-shielding member 10 as a comparative example. In the comparative example, the bent string 60 blocks only a part of the optical axis 50. The unobstructed region of the optical axis 50 is detected by the upper end device 31a. Therefore, the upper end device 31a does not transmit the detection signal with an obstacle.

Next, the first antireflection member 11 will be described with reference to FIG.
FIG. 5 is a diagram showing a first antireflection member when the elevator door is closed according to the first embodiment.

FIG. 5A is a diagram showing the safety device 100 of the first embodiment. As shown in FIG. 5A, for example, the first antireflection member 11 is provided at the center of the car door 1b in the vertical direction. For example, the first antireflection member 11 is provided so as not to interfere with the operation of the multi-optical axis sensor receiver 3. The first antireflection member 11 suppresses the reflection of the first stray light portion 51 on the car door 1b. The first stray light portion 51 is a region of the light beam 50a at the end in the descending direction.

FIG. 5B is a diagram showing a safety device 100 not provided with the first antireflection member 11 as a comparative example. In the comparative example, for example, the first stray light unit 51 reflects off the car door 1b. The upper end device 31a detects the reflected first stray light unit 51. Therefore, regardless of the presence or absence of an obstacle, the upper end device 31a does not transmit a detection signal with an obstacle.

Next, the second antireflection member 12 will be described with reference to FIG.
FIG. 6 is a diagram showing a second antireflection member when the elevator door is closed according to the first embodiment.

In FIG. 6, for example, the second antireflection member 12 is provided at the center of the multi-optical axis sensor receiver 3 in the vertical direction. For example, when the distance between the door shoe 2 and the multi-optical axis sensor receiver 3 becomes short due to the closing operation, the second antireflection member 12 has many second stray light portions 52, which are the horizontal end portions of the light beam 50a. Optical axis sensor Suppresses reflection on the receiver 3.

According to the first embodiment described above, the elevator door includes a car door 1a as a first car door. The elevator door includes a car door 1b as a second car door. A set of optical axis sensors 30a includes an upper end device 31a and a lower end device 33a. The upper end device 31a is provided at the upper end of the door shoe 2. The lower end device 33a is provided at the lower end of the door shoe 2. The lower end device 33a forms a light beam 50a with the upper end device 31a. When one set of optical axis sensors 30a transmits a detection signal with an obstacle, the safety device 100 moves the car door 1a and the car door 1b in the opening direction. The lower end device 33a includes a lower light passage surface 34a through which the light beam 50a passes. The lower light passage surface 34a is provided so as to incline vertically downward as the distance from the door shoe 2 increases. Therefore, the lower optical passage surface 34a can push up the string 60 upward with the closing operation. As a result, the safety device 100 can detect a string-shaped obstacle near the floor surface. Further, the lower light passage surface 34a can suppress the accumulation of dust 61 on the upper surface.

Further, the upper end device 31a includes a light receiver 35a. The lower end device 33a includes a floodlight 36a. A set of optical axis sensors 30a forms an optical beam 50a and an optical axis 50 directed from the lower end device 33a to the upper end device 31a. Therefore, the light beam 50a converges as it goes downward. As a result, the safety device 100 can improve the ability to detect obstacles existing below.

Further, the set of optical axis sensors 30a may be provided with a light receiver 35a below. The set of optical axis sensors 30a may include a floodlight 36a above. That is, the upper end device 31a includes a floodlight 36a. The lower end device 33a includes a light receiver 35a. In this case, the lower end device 33a transmits a detection signal with an obstacle to the controller 4. As a result, the safety device 100 can improve the ability to detect obstacles existing above.

Further, the upper end device 31a and the lower end device 33a are detachably provided on the door shoe 2. As a result, the safety device 100 can improve workability when a set of optical axis sensors 30a is maintained and maintained.

Further, the door shoe 2 is equipped with a multi-optical axis sensor floodlight. The multi-optical axis sensor receiver 3 is provided on the car door 1b so as to face the multi-optical axis sensor floodlight. That is, the safety device 100 includes a multi-optical axis sensor. Therefore, the safety device 100 can detect the presence or absence of an obstacle without coming into contact with the obstacle.

Further, the first light-shielding member 10 is provided on the door shoe 2. The first light-shielding member 10 blocks a part of the region of the light beam 50a near the leading edge 2a. Therefore, the first light-shielding member 10 can block a part of the optical axis 50 that passes when the string 60 is bent. As a result, the safety device 100 can improve the accuracy of detecting obstacles.

Further, the first antireflection member 11 is provided on the side surface of the car door 1b in the riding direction. That is, the first antireflection member 11 is provided on the side surface of the car door 1b in the car internal direction. Therefore, the first antireflection member 11 can suppress the reflection of the first stray light portion 51 in the descending direction on the car door 1b. As a result, the safety device 100 can improve the accuracy of detecting obstacles.

Further, the second antireflection member 12 is provided on the side surface of the multi-optical axis sensor receiver 3 in the other direction so as to face the door shoe 2. Therefore, the second antireflection member 12 can suppress the reflection of the second stray light portion 52 in the horizontal direction on the multi-optical axis sensor receiver 3. As a result, the safety device 100 can improve the accuracy of detecting obstacles.

Further, the guidance jig 13 is provided at the lower end of the car door 1b. The guide jig 13 is provided so that the inclined surface is inclined vertically downward toward the other direction. Therefore, the guide jig 13 can push up the string 60 upward with the closing operation. As a result, the safety device 100 can improve the detection ability of the string 60 existing below.

Next, a modified example of the light receiver 35a and the floodlight 36a in the set of optical axis sensors 30a will be described with reference to FIG. 7.
FIG. 7 is a modified example of the optical axis sensor 30a of the elevator door in the first embodiment.

As shown in FIG. 7, in the modified example of the optical axis sensor 30a of the first embodiment, the upper end device 31a includes a light receiver 35a and a floodlight 36a. The lower end device 33a includes a reflector 37a. For example, the lower light passage surface 34a includes a reflector 37a.

For example, the reflector 37a has a surface having photoreflexivity. The reflector 37a reflects the light on the surface in the direction in which the light is incident.

The floodlight 36a of the upper end device 31a emits the optical axis 50. After that, the optical axis 50 is reflected by the lower end device 33a. The reflected optical axis 53 is received by the receiver 35a of the upper end device. The reflected optical axis 53 is an optical axis after the optical axis 50 is reflected by the lower end device 33a.

According to the modification of the optical axis sensor 30a of the first embodiment described above, the upper end device 31a includes a light receiver 35a and a floodlight 36a. The lower end device 33a includes a reflector 37a. The optical axis 50 emitted from the upper end device 31a is reflected by the lower end device 33a. The reflected optical axis 53 is received by the receiver 35a of the upper end device 31a. Therefore, the lower end device 33a can be made smaller than the lower end device 33a of the first embodiment. Further, the set of optical axis sensors 30a can detect obstacles by using the optical beam 50a and the reflected optical axis 53. Therefore, the safety device 100 can improve the accuracy of detecting obstacles.

The door shoe 2 may be mechanical. For example, the car door 1a opens by moving the door shoe 2 relative to the car door 1a in the closing direction.

Next, a modified example of the installation position of the guide jig 13 will be described with reference to FIG.
FIG. 8 is a modified example of the installation position of the guide jig for the elevator door in the first embodiment.

As shown in FIG. 8, the guidance jig 13 is provided at the lower end of the car door 1b. The guide jig 13 is provided so that the lower portion exists in the region of the groove of the car sill. When the car door 1b moves, the guide jig 13 moves in the region of the groove of the car sill.

The lower part of the car door 1a (not shown) has a notch (not shown). The notch stores the guide jig 13 inside when the car door 1a and the car door 1b are fully closed.

In the modified example of the installation position of the guide jig in the first embodiment described above, the lower portion of the guide jig 13 exists in the region of the groove of the car sill. When the car door 1b moves, the guidance jig 13 moves in the region of the groove of the car sill. Therefore, the guidance jig 13 can push up an obstacle in contact with the floor surface upward. As a result, the safety device 100 can improve the ability to detect obstacles.

The guide jig 13 may be provided on the car door 1a in addition to the one provided on the car door 1b.

For example, the safety device 100 includes two guidance jigs 13. One of the two guidance jigs 13 is provided on the car door 1b. The other of the two guidance jigs 13 (not shown in FIG. 9) is provided on the unidirectional side of the lower end of the car door 1a. The other of the two guidance jigs 13 is provided so that the inclined surface is inclined in the vertical direction toward one direction. The other of the two guidance jigs 13 is provided at a position where the car door 1a and the car door 1b do not physically interfere with one of the two guidance jigs 13 when the car door 1a and the car door 1b are fully closed.

Therefore, the two guide jigs 13 can push up the obstacles existing below. As a result, the safety device 100 can improve the ability to detect obstacles existing below.

Next, an installation example of the safety device 100 in the single door system will be described with reference to FIG. 9.
FIG. 9 is a modified example of the elevator door in the first embodiment.

As shown in FIG. 9, the elevator door is a single door type. For example, the elevator door is a 2S system. The elevator door includes a car door 1c and a door per door 5.

The car door 1c is provided at the entrance / exit of a car (not shown). The car door 1c opens and closes by moving in the horizontal direction. The car door 1c includes a door shoe 2. One side end of the car door 1c is stored in the accommodation space of the elevator door in the fully closed state.

For example, the door stop 5 is a rod-shaped member. For example, the door stop 5 is connected to the car by a door stop pillar. The door stop 5 is provided in the accommodation space. The door stop 5 is provided so as to face the car door 1c. For example, the door stop 5 contacts the door shoe 2 when the car door 1c is fully closed.

For example, the door shoe 2 includes a multi-optical axis sensor floodlight. For example, the door shoe 2 includes a plurality of light projecting portions that emit light axes in the longitudinal direction.

The door shoe 2 is provided so as to project in one direction of the car door 1c. For example, the door shoe 2 is provided so as to irradiate the optical axis of the multi-optical axis sensor with respect to 5 per door.

For example, the multi-optical axis sensor receiver 3 is provided at 5 per door. For example, the multi-optical axis sensor receiver 3 is provided on the other side of the door stop 5. For example, the multi-optical axis sensor receiver 3 is provided so as to receive a plurality of optical axes of the multi-optical axis sensor.

A set of optical axis sensors 30a includes an upper end device 31a and a lower end device 33a. A set of optical axis sensors 30a is detachably provided on the door shoe 2.

The first antireflection member 11 is provided in the accommodation space riding direction on the side surface of the car. The first antireflection member 11 is provided on the side other than the door stop 5. For example, the first antireflection member 11 is provided at the same height as the center of the car door 1c in the vertical direction.

The guidance jig 13 is provided at the lower end of the door stop 5 so that the inclined surface is inclined with respect to the horizontal direction. For example, the guidance jig 13 is provided on the other side of the door stop 5. The guide jig 13 is provided so that the inclined surface is inclined vertically downward toward the other direction. For example, the guidance jig 13 is provided so that the lower portion exists in the area of the car threshold (not shown). For example, the guidance jig 13 is provided so that the inclined surface exists in a part of the entrance / exit of the car. For example, when the car door 1c is fully closed, the guidance jig 13 is stored in a notch provided in the lower part of the car door 1c.

In the modified example of the elevator door of the first embodiment described above, the elevator door is provided with 5 per door. The first antireflection member 11 is provided in the accommodation space riding direction on the side surface of the car. Therefore, the first antireflection member 11 can suppress the reflection of the first stray light portion 51 (not shown in FIG. 9) on the side surface of the car. As a result, the safety device 100 can improve the accuracy of detecting obstacles.

Further, the guidance jig 13 is provided at the lower end of the door stop 5. The guide jig 13 is provided so that the inclined surface is inclined vertically downward toward the other direction. Therefore, the guide jig 13 can push up the string 60, which is not shown in FIG. 9, as an obstacle in the closing operation. As a result, the safety device 100 can improve the detection ability of the string 60 existing below.

The door shoe 2 may be mechanical. For example, the car door 1c opens by moving the door shoe 2 relative to the car door 1c in the closing direction. When the door shoe 2 is mechanical, the second antireflection member 12 is provided at the door stop 5.

The guide jig 13 may be provided on the car door 1c in addition to the one provided on the door stop 5.

For example, the safety device 100 includes two guidance jigs 13. One of the two guidance jigs 13 is provided at the door stop 5. The other of the two guidance jigs 13 (not shown in FIG. 9) is provided on the unidirectional side of the lower end of the car door 1c. The other of the two guidance jigs 13 is provided so that the inclined surface is inclined in the vertical direction toward one direction. The other of the two guidance jigs 13 is provided at a position where it does not physically interfere with one of the two guidance jigs 13 when the car door 1c is fully closed.

Embodiment 2.
FIG. 10 is a diagram showing an elevator door according to the second embodiment. The same or corresponding parts as those of the first embodiment are designated by the same reference numerals. The explanation of this part is omitted.

As shown in FIG. 10, the safety device 100 includes a set of optical axis sensors 30b. A set of optical axis sensors 30b includes an upper end device 31b and a lower end device 33b. A set of optical axis sensors 30b forms an optical beam 50a between the upper end device 31b and the lower end device 33b. A set of optical axis sensors 30b forms an optical axis 50 between the upper end device 31b and the lower end device 33b.

For example, the upper end device 31b has the same configuration as the upper end device 31a of the first embodiment.

The lower end device 33b includes a lower light passage surface 34b, a floodlight 36b, and a light guide 40.

For example, the lower end device 33b is provided on the lower surface of the door shoe 2. For example, the lower end device 33b is connected to the lower surface of the door shoe 2 and the trailing edge 2b. The lower end device 33b is provided so that the lower light passage surface 34b faces upward. For example, the lower end device 33b is provided so that the lower light passage surface 34b has an angle of 45 degrees or more from the horizontal plane.

For example, the floodlight 36b is connected to the trailing edge 2b.

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 passage surface 34b. The light guide 40 changes the traveling direction of the received light beam 50a vertically upward.

Next, the floodlight 36b and the light guide 40 in the lower end device 33b will be described with reference to FIG.
FIG. 11 is a lower end device for an elevator door according to the second embodiment.

As shown in FIG. 11, the floodlight 36b is connected to the trailing edge 2b. For example, the floodlight 36b irradiates the light beam 50a in the vertical downward direction.

For example, the light guide 40 includes a lens 41 and a reflector 42. The light guide 40 is provided below the door shoe 2.

For example, the lens 41 is a convex lens. The lens 41 is provided so that the convex surface faces the floodlight 36b. For example, the optical axis of the lens 41 is provided so as to coincide with the optical axis 50. For example, the lens 41 is provided so that the focal point coincides with the light source of the floodlight 36b.

For example, the reflective material 42 includes a prism. The reflective material 42 allows light to pass through the inside. The reflective material 42 changes the traveling direction of the light by reflecting the light on the inner wall.

For example, the reflective material 42 is provided inside the lower end device 33b. For example, the other end of the reflector 42 is provided below the lens 41. For example, the unidirectional end of the reflector 42 is connected to the lower light transmission surface 34b. The reflective material 42 is provided so that the optical axis 50 is emitted directly above.

The light beam 50a emitted from the floodlight 36b passes through the lens 41, the reflector 42, and the lower light passing surface 34b. After that, the light beam 50a is emitted from the lower end device 33a.

The floodlight 36a emits a light beam 50a in the vertically downward direction. The floodlight 36a radially emits a light beam 50a.

The light beam 50a is incident on the lens 41. For example, the light beam 50a is collimated with the lens 41. "Collected" is defined as the ability to align the angles of multiple rays in parallel. Therefore, the light beam 50a is emitted from the lens 41 in parallel in the downward direction. After that, the light beam 50a is incident on the reflector 42.

The traveling direction of the light beam 50a can be changed inside the reflective material 42. The light beam 50a travels inside the reflector 42 in the direction of the leading edge 2a. After that, the light beam 50a travels vertically upward. The light beam 50a is emitted vertically upward from the reflective material 42.

The light beam 50a passes through the lower light passage surface 34b and is emitted vertically upward from the lower end device 33b.

Next, the shape of the prism included in the light guide 40 in the set of optical axis sensors 30b will be described with reference to FIG.
FIG. 12 is a light guide for an elevator door according to the second embodiment.

As shown in FIG. 12, for example, the reflective material 42 includes a prism 42a.

The prism 42a has a trapezoidal shape. The prism 42a has two equal base angles. For example, the lower base of the prism 42a has a base angle θ _b .

The prism 42a is provided so that the upper base and the lower base are parallel to each other in the horizontal direction. The prism 42a is provided so that the optical axis 50 is incident on the leg on the other direction side. The prism 42a is provided so that the optical axis 50 is emitted from the leg on the one-way side.

The optical axis 50 is incident on the prism 42a at _{an incident angle θ 1.} The optical axis 50 emits light from the prism 42a at _{an emission angle θ 2.} As shown in FIG. 10, when the two base angles of the lower base are _{equal in θ b} , the emission angle θ ₂ depends on the _{incident angle θ 1} regardless of the refractive index of the prism 42a. For example, the emission angle θ ₂ is equal to the _{incident angle θ 1} regardless of the refractive index of the prism 42a.

According to the second embodiment described above, the elevator door includes a car door 1a as a first car door. The elevator door includes a car door 1b as a second car door. A set of optical axis sensors 30b includes an upper end device 31b and a lower end device 33b. The upper end device 31b is provided at the upper end of the door shoe 2. The lower end device 33b is provided at the lower end of the door shoe 2. The lower end device 33b forms a light beam 50a with the upper end device 31b. When one set of optical axis sensors 30b transmits a detection signal with an obstacle, the safety device 100 moves the car door 1a and the car door 1b in the opening direction. The lower end device 33b includes a light guide 40. The light guide 40 is provided below the door shoe 2. The light guide 40 changes the traveling direction of the received light beam 50a in the vertically upward direction. Therefore, the floodlight 36b can be provided at a portion other than the vicinity of the leading edge 2a of the door shoe 2. That is, the protruding portion of the lower end device 33b can be miniaturized. The door shoe 2 can be provided further down. As a result, the safety device 100 can widen the detection range of the lower part of the door shoe.

Further, the upper end device 31b includes a light receiver 35b. The lower end device 33b includes a floodlight 36b. A set of optical axis sensors 30b forms an optical beam 50a and an optical axis 50 directed from the lower end device 33b toward the upper end device 31b. Therefore, the light beam 50a converges as it goes downward. As a result, the safety device 100 can improve the ability to detect obstacles existing below.

Further, the light guide 40 is provided so as to protrude from the door shoe 2 in the direction of the trailing edge 2b. The floodlight 36b is provided on the trailing edge 2b. The floodlight 36b is provided so as to emit a light beam 50a in a vertically downward direction. Therefore, in the lower end device 33b, the region located below the door shoe 2 can be reduced. As a result, the safety device 100 can widen the detection range of the door shoe 2.

Further, the lower end device 33b is provided so that the lower optical passage surface 34b has an angle of 45 degrees or more from the horizontal plane. Therefore, when the traveling direction of the light beam 50a is changed in the vertical direction, the light beam 50a is focused in the horizontal direction. The horizontal width of the light beam 50a becomes narrower. As a result, the safety device 100 can improve the ability to detect obstacles.

Further, the light guide 40 includes a prism 42a. The prism 42a can change the traveling direction of the light beam 50a by reflecting the light beam 50a on the inner wall. Therefore, the floodlight 36b can be provided in a place not directly under the light receiver 35b. As a result, the safety device 100 can reduce the size of the region of the lower end device 33b protruding toward the front edge side.

Further, the prism 42a has a trapezoidal cross section in which the two base angles of the lower base are equal. The optical axis 50 passes through the leg on one side and the leg on the other side of the trapezoid. Therefore, in the optical axis 50, the declination angle of the prism 42a does not depend on the refractive index of the prism 42a. The declination angle of the prism 42a is determined by the angle of incidence on the prism 42a. As a result, the safety device 100 can keep the position of the optical axis 50 constant regardless of the change in the refractive index due to the temperature change.

Further, the light guide 40 includes a lens 41. The lens 41 has the shape of a convex lens. The lens 41 faces the floodlight 36b. The lens 41 is provided so that the focal point coincides with the light source of the floodlight 36b. Therefore, the light beam 50a is collimated with the lens 41. As a result, the safety device 100 can suppress the stray light of the light beam 50a.

Further, the lower end device 33b includes a lower optical passage surface 34b. The lower light passage surface 34b allows the light beam 50a to pass through. The lower light passage surface 34b is provided so as to incline vertically downward as the distance from the door shoe 2 increases. Therefore, the lower optical passage surface 34b can push up the string 60 upward with the closing operation. Further, the lower light passage surface 34b can suppress the accumulation of dust 61 on the upper surface.

Next, a modified example of the shape of the prism 42a will be described with reference to FIG.
FIG. 13 is a modification of the prism of the elevator door safety device according to the second embodiment.

As shown in FIG. 13, for example, the prism 42a has a hexagonal shape. The prism 42a has two opposing angles at an angle θ _c. The prism 42a has two adjacent angles at an angle θ _{d on} the lowermost side.

The optical axis 50 is incident on the prism 42a at _{an incident angle θ 1.} The optical axis 50 reflects inside the prism 42a on two sides between the _{angle θ c} and the angle θ _d. The optical axis 50 emits light from the prism 42a at _{an emission angle θ 2.}

In the modification of the prism according to the second embodiment described above, the emission angle θ ₂ depends on the _{incident angle θ 1} regardless of the refractive index of the prism 42a. For example, the emission angle θ ₂ is equal to the _{incident angle θ 1} regardless of the refractive index of the prism 42a. As a result, the safety device 100 can keep the position of the optical axis 50 constant regardless of the change in the refractive index due to the temperature change.

Next, a first modification of the lower end device 33b in the set of optical axis sensors 30b will be described with reference to FIG.
FIG. 11 is a first modification of the lower end device of the elevator door in the second embodiment.

As shown in FIG. 14, in the first modification, the lower end device 33b includes a floodlight 36b and a light guide 40.

The floodlight 36b is connected to the trailing edge 2b. For example, the floodlight 36b irradiates the light beam 50a in the vertical downward direction.

The light guide 40 includes a prism 43 with a curved lens surface.

The prism 43 with a curved lens surface includes a curved surface 43a and an exit surface 43b. For example, the prism 43 with a curved lens surface is provided so that the curved surface 43a faces the floodlight 36b. For example, the prism 43 with a curved lens surface is provided so that the light source of the floodlight 36b is located at the focal point of the curved surface 43a. For example, the prism 43 with a curved lens surface is provided so that the emission surface 43b is located below the lower light transmission surface 34b.

The curved surface 43a includes a convex curved surface.

The light beam 50a is incident on the prism 43 with a lens curved surface on the curved surface 43a. For example, the light beam 50a is collimated on the curved surface 43a. After that, the light beam 50a passes through the inside of the prism 43 with a curved lens surface and is emitted from the exit surface 43b.

According to the first modification of the second embodiment described above, the light guide 40 includes a prism 43 with a curved lens surface. The prism 43 with a curved lens surface has a convex curved surface. The prism 43 with a curved lens surface is provided so that the convex curved surface faces the floodlight 36b. The prism 43 with a curved lens surface changes the traveling direction 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 the stray light of the light beam 50a.

Next, a second modification of the lower end device 33b in the set of optical axis sensors 30b will be described with reference to FIG.
FIG. 15 is a second modification of the lower end device of the elevator door in the second embodiment.

As shown in FIG. 15, in the second modification, the lower end device 33b includes a floodlight 36b and a light guide 40.

The floodlight 36b is connected to the trailing edge 2b. The floodlight 36b irradiates the light beam 50a in one horizontal direction.

For example, the light guide 40 includes a prism 43 with a curved lens surface.

For example, the prism 43 with a curved lens surface includes a curved surface 43a and an exit surface 43b. For example, the prism 43 with a curved lens surface is provided so that the curved surface 43a faces the floodlight 36b. For example, the prism 43 with a curved lens surface is provided so that the light source of the floodlight 36b is located at the focal point of the curved surface 43a. For example, the prism 43 with a curved lens surface is provided so that the emission surface 43b is located below the lower light transmission surface 34b.

For example, the curved surface 43a includes a convex curved surface.

The light guide 40 does not have to include the prism 43 with a curved lens surface. For example, the light guide 40 includes a prism having no curved surface.

According to the second modification of the second embodiment described above, the floodlight 36b is connected to the trailing edge 2b. The floodlight 36b emits a light beam 50a traveling in the horizontal direction toward the light guide 40. Therefore, the lower end device 33b does not have to include the floodlight 36b below the door shoe 2. The lower portion of the door shoe 2 of the lower end device 33b can be miniaturized. As a result, the door shoe 2 can be provided at a lower position.

Next, a third modification example of the lower end device 33b in the set of optical axis sensors 30b will be described with reference to FIG.
FIG. 16 is a third modification of the lower end device of the elevator door in the second embodiment.

As shown in FIG. 16, in the third modification, the lower end device 33b includes a floodlight 36b and a light guide 40.

The floodlight 36b is provided below the door shoe 2. For example, the floodlight 36b irradiates the light beam 50a in one direction.

For example, the light guide 40 includes a prism 43 with a curved lens surface.

For example, the curved surface 43a includes a convex curved surface.

According to the third modification of the second embodiment described above, the light receiver 35b is provided below the door shoe 2. The light receiver 35b emits a light beam 50a toward the light guide 40. The light receiver 35b emits a light beam 50a in one horizontal direction. Therefore, the floodlight 36b can be provided in a place not directly under the light receiver 35b. As a result, the safety device 100 can reduce the size of the region of the lower end device 33b protruding toward the front edge side.

The light guide 40 does not have to include the prism 43 with a curved lens surface. For example, the light guide 40 includes a prism having no curved surface. For example, the light guide 40 includes a reflector.

Embodiment 3.
FIG. 17 is a diagram showing an elevator door according to the third embodiment. The same or corresponding parts as those of the first embodiment or the second embodiment are designated by the same reference numerals. The explanation of this part is omitted.

As shown in FIG. 17, the safety device 100 includes a set of optical axis sensors 30c, a first antireflection member 11, and a second light-shielding member 14. A set of optical axis sensors 30c includes an upper end device 31c and a lower end device 33c.

A set of optical axis sensors 30c forms an optical beam 50a between the upper end device 31c and the lower end device 33c. A set of optical axis sensors 30c forms an optical axis 50 between the upper end device 31c and the lower end device 33c. For example, a set of optical axis sensors 30c forms an optical axis 50 in the vicinity of 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 at a position in a descending direction and one direction with respect to a leading edge 2a.

For example, the upper end device 31c has a rectangular parallelepiped shape. The upper end device 31c includes an upper light passage surface 32c. For example, the upper end device 31c includes a light receiver 35c.

The upper end device 31c is provided on the upper surface of the door shoe 2. The upper end device 31c is provided so as to protrude in the downward direction from the door shoe 2. The upper end device 31c is provided so that the upper light passing surface 32c protrudes from the door shoe 2 in the direction of the leading edge 2a. The upper end device 31c is provided so that the upper light passage surface 32c is on the lower surface. For example, the upper end device 31c is electrically connected to a controller 4 (not shown).

For example, the upper end device 31c receives the optical axis 50 that has passed through the upper optical passage surface 32c. For example, when the upper end device 31c does not receive the optical axis 50, it transmits a detection signal with an obstacle to a controller 4 (not shown).

The lower end device 33c is provided on the side surface of the door shoe 2 in the descending direction. The lower end device 33c is provided below the door shoe 2. The lower end device 33c is provided so that the optical axis 50 passes through the lower optical passage surface 34c.

For example, the lower end device 33c transmits the optical axis 50 through the lower optical passage surface 34c.

For example, the second light-shielding member 14 has a rectangular parallelepiped shape. For example, the length in the boarding / alighting direction of the second light-shielding member 14 is equal to the length in the boarding / alighting direction of the lower end device 33c.

The second light-shielding member 14 is provided on the side surface of the door shoe 2 in the descending direction. The second light-shielding member 14 is provided between the upper light-transmitting surface 32c and the lower light-transmitting surface 34c. For example, the unidirectional side surface of the second light-shielding member 14 is provided on the same plane as the leading edge 2a. For example, the second light-shielding member 14 blocks a part of the optical axis 50 on the other direction side.

Next, the structure of the lower end device 33c will be described with reference to FIG.
FIG. 18 is a diagram showing a lower end device for an elevator door according to the third embodiment.

As shown in FIG. 18, the lower end device 33c includes a lower light passage surface 34c, a floodlight 36c, and a light guide 40.

The floodlight 36c includes a mounting portion 62, a mold 63, a substrate 64, and a light source 65. For example, the floodlight 36c is provided in the other direction of the door shoe 2.

The mounting portion 62 is provided in the other direction of the door shoe 2. One end of the mounting portion 62 is connected to the trailing edge 2b.

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

The mold 63 is provided in the other direction of the door shoe 2. The side surface of the mold 63 in the riding direction is connected to the other end of the mounting portion 62.

For example, the substrate 64 includes a circuit for causing the light source 65 to emit light. The substrate 64 is provided inside the mold 63.

The light source 65 is connected to the substrate 64. The light source 65 emits light when controlled by the substrate 64.

For example, the light guide 40 includes a lens 41 and a reflector 42. The light guide 40 is provided on the side of the door shoe 2 in the descending direction. One end of the light guide 40 is connected to the lower light passage surface 34c. The other end of the light guide 40 is connected to the floodlight 36c.

For example, the lens 41 is a convex lens. The lens 41 is provided so that the convex surface faces the floodlight 36c. For example, the optical axis of the lens 41 is provided so as to coincide with the optical axis 50. For example, the lens 41 is provided so that the focal point coincides with the light source of the floodlight 36c.

For example, the reflective material 42 is provided on the side surface of the door shoe 2 in the other direction. For example, the other end of the reflector 42 faces the lens 41. For example, the unidirectional end of the reflector 42 is connected to the lower light transmission surface 34c. The reflective material 42 is provided so that the optical axis 50 is emitted directly above.

Next, a case where the safety device 100 detects the string 60 will be described with reference to FIG.
FIG. 19 is a plan view of the elevator door in the third embodiment as viewed from above.

As shown in FIG. 19, for example, when the car door 1a and the car door 1b close with the string 60 crossing the doorway of a car (not shown), the door shoe 2 comes into contact with the string 60.

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

According to the third embodiment described above, the set of optical axis sensors 30c includes an upper end device 31c and a lower end device 33c. The upper end device 31c is provided at the upper end of the door shoe 2. The lower end device 33c is provided on the side surface of the door shoe 2 in the descending direction. A set of optical axis sensors 30c forms an optical beam 50a between the upper end device 31c and the lower end device 33c. A set of optical axis sensors 30c forms an optical beam 50a along the end face of the door shoe 2. Therefore, the safety device 100 can install a set of optical axis sensors 30c without replacing the door shoe 2. As a result, the elevator door safety device 100 can form the light beam 50a by using the existing door shoe 2. Further, the safety device 100 can be provided with a set of optical axis sensors 30c at low cost.

Further, the upper end device 31c includes a light receiver 35c. The lower end device 33c includes a floodlight 36c. A set of optical axis sensors 30c forms an optical beam 50a and an optical axis 50 directed from the lower end device 33c to the upper end device 31c. Therefore, the light beam 50a converges as it goes downward. As a result, the safety device 100 can improve the ability to detect obstacles existing below.

Further, the lower end device 33c includes a light guide 40. The light guide 40 changes the light beam 50a from the horizontal direction to the vertically upward direction. Therefore, the lower end device 33c can be provided with the floodlight 36c at a place not directly under the receiver 35c.

Further, the second light-shielding member 14 is provided on the side surface of the door shoe 2 in the descending direction. The second light-shielding member 14 is provided so as to block a part of the optical axis 50. Therefore, the safety device 100 can improve the detection accuracy of the string 60 in contact with the door shoe 2.

Note that, in the second or third embodiment, the safety device 100 is applied regardless of the form of the car door. For example, the safety device 100 is used in a single door type elevator as in the first embodiment. For example, the safety device 100 is used in a double-door door shoe type elevator.

In the second or third embodiment, the lens 41 is not limited to a convex lens as long as it has a function of collimating the optical axis 50. For example, the lens 41 is a collimator lens.

Note that, in the second or third embodiment, the light guide 40 does not have to include the lens 41. For example, when the floodlight 36c is provided with a light source having high directivity, the light guide 40 does not include the lens 41. Specifically, the light source having high directivity is a light source using a shot put LED element, a laser light source, or the like.

As described above, the elevator door safety device according to the present disclosure can be used for the elevator system.

1a, 1b, 1c cage door, 2 door shoe, 2a front edge, 2b trailing edge, 3 multi-optical axis sensor receiver, 4 controller, 5 per door, 10 1st light shielding member, 11 1st antireflection member, 12th 2 Anti-reflection member, 13 Guidance jig, 14 Second light-shielding member, 30a, 30b, 30c Optical axis sensor, 31a, 31b, 31c Upper end device, 32a, 32c Upper light passage surface, 33a, 33b, 33c Lower end device, 34a , 34b, 34c Lower light transfer surface, 35a, 35b, 35c Receiver, 36a, 36b, 36c Floodlight, 37a Reflector, 40 Light guide, 41 Lens, 42 Reflective material, 42a prism, 43 Lens curved prism, 43a Curved surface, 43b emission surface, 50 optical axis, 51 1st stray light part, 52 2nd stray light part, 53 reflected light axis, 60 string, 61 dust, 62 mounting part, 63 mold, 64 board, 65 light source, 100 safety device

Claims

The upper end device provided at the upper end of the door shoe provided in the first car door of the elevator, and the upper end device.
A lower end device provided at the lower end of the door shoe and forming a light beam with the upper end device along the end surface of the door shoe.
Equipped with
The lower end device is
A safety device for an elevator door with a lower light passage surface provided to allow the light beam to pass and incline downward as it moves away from the door shoe.
The upper end device comprises a light receiver that receives the light beam or a floodlight that emits the light beam.
The elevator door safety device according to claim 1, wherein the lower end device includes the floodlight or the light receiver.
The upper end device includes a floodlight that emits the light beam and a light receiver that receives the light beam.
The elevator door safety device according to claim 1, wherein the lower end device includes a reflector that reflects the light beam upward.
The elevator door safety device according to any one of claims 1 to 3, wherein the upper end device and the lower end device are detachably provided on the door shoe.
The multi-optical axis sensor floodlight provided on the door shoe and
A multi-optical axis sensor receiver provided so as to face the multi-optical axis sensor floodlight, and
The elevator door safety device according to any one of claims 1 to 4, comprising the above.
The safety device for an elevator door according to any one of claims 1 to 5, which is provided on the leading edge of the door shoe and includes a first light-shielding member that blocks a part of the light beam.
The safety of the elevator door according to any one of claims 1 to 6, wherein the second car door facing the first car door is provided with a first antireflection member provided on a side surface in the direction of the inside of the car. Device.
Claims 1 to 7 are provided with a second antireflection member provided so as to face the door shoe in the second car door facing the first car door or the door stop facing the first car door. Elevator door safety device according to any one of the above.
The lower end of the second car door facing the first car door or the lower end of the door stop facing the first car door so as to have an inclined surface and the inclined surface inclines downward as it approaches the first car door. The elevator door safety device according to any one of claims 1 to 8, which is provided with a guidance jig provided in the above.