JP2017077959A - Control device of elevator door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device of an elevator door capable of preventing erroneous detection of an object.SOLUTION: A control device of an elevator door includes: a projector disposed at an elevator door device and for projecting light so as to cross an entrance door of an elevator; a light receiver disposed at the elevator door device and having a light-receiving surface facing a side of the projector; a detection device for detecting an object on the basis of a light receiving condition of the light receiver; and an adjusting device for adjusting sensibility of the light receiver during the elevator door device is closed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an elevator door control device.

  Patent Document 1 discloses an elevator door control device. The control device includes a projector, a light receiver, and a detection device. The projector casts light across the elevator doorway. The light receiver includes a light receiving surface facing the projector. The detection device detects an object based on the light receiving state of the light receiver.

International Publication No. 2007/066375

  However, in the thing of patent document 1, the stain | pollution | contamination etc. of the light-receiving surface of a light receiver change every day. For this reason, even when there is no object that blocks the light from the projector, the detection device may erroneously detect the object.

  The present invention has been made to solve the above-described problems. An object of the present invention is to provide an elevator door control device that can prevent erroneous detection of an object.

  An elevator door control device according to the present invention is provided in an elevator door device, and has a light projector that projects light so as to cross an entrance / exit of the elevator, and a light receiving surface that is provided in the elevator door device and faces the projector. A light receiver; a detection device that detects an object based on a light reception state of the light receiver; and an adjustment device that adjusts sensitivity of the light receiver when the elevator door device is closed.

  The elevator door control device according to the present invention corresponds to the plurality of projectors arranged in the vertical direction in the elevator door device and projecting light so as to cross the entrance / exit of the elevator, and the plurality of projectors in the elevator door device. A plurality of light receivers that are arranged side by side in the vertical direction and have a light receiving surface facing the corresponding projector, a detection device that detects a string-like object based on a light reception state of the plurality of light receivers, and the elevator And an adjusting device for adjusting the sensitivity of the plurality of light receivers when the door device is closed.

  According to these inventions, the sensitivity of the light receiver is adjusted when the elevator door device is closed. For this reason, the sensitivity of the light receiver is set appropriately. As a result, erroneous detection of an object can be prevented.

1 is a configuration diagram of an elevator to which an elevator door control device according to Embodiment 1 of the present invention is applied. FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a car doorway when viewed from the inside of an elevator car to which an elevator door control device according to Embodiment 1 of the present invention is applied. It is a figure for demonstrating the outline | summary of the method of detecting a string-like object with the control apparatus of the elevator door in Embodiment 1 of this invention. It is a figure for demonstrating the specific example of the method of detecting a string-like object with the control apparatus of the elevator door in Embodiment 1 of this invention. It is a figure for demonstrating the state of the elevator to which the control apparatus of the elevator door in Embodiment 1 of this invention was applied. It is a flowchart for demonstrating the outline | summary of operation | movement of the control apparatus of the elevator door in Embodiment 1 of this invention. It is a hardware block diagram of the detection apparatus and adjustment apparatus in the control apparatus of the elevator door in Embodiment 1 of this invention. It is a flowchart for demonstrating the outline | summary of operation | movement of the control apparatus of the elevator door in Embodiment 2 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the part which is the same or it corresponds in each figure. The overlapping explanation of the part is appropriately simplified or omitted.

Embodiment 1 FIG.
1 is a configuration diagram of an elevator to which an elevator door control device according to Embodiment 1 of the present invention is applied.

  In FIG. 1, an elevator hoistway 1 passes through each floor of a building. For example, the elevator machine room 2 is provided above the hoistway 1.

  The elevator hall 3 is provided on each floor of the building. Each landing 3 faces the hoistway 1. The entrance / exit of each hall 3 (not shown) is provided as a part of the entrance / exit of the elevator. Each landing door 4 is provided as a part of the elevator door device. Each landing door 4 is provided at an entrance of each landing 3. A hall call button 5 is provided at each hall 3. Each hall call button 5 includes an up button (not shown) and a down button (not shown).

  The elevator car 6 is provided inside the hoistway 1. The entrance / exit of the car 6 (not shown) is provided as a part of the entrance / exit of the elevator. The car door 7 is provided as a part of the elevator door device. The car door 7 is provided at the entrance of the car 6. For example, the elevator door control device 8 is provided in the car door 7. The car operation panel 9 is provided inside the car 6. The car operation panel 9 includes buttons corresponding to each floor.

  For example, the elevator control device 10 is provided in the machine room 2.

  When the user operates the hall call button 5 at the hall 3, the elevator control device 10 moves the car 6 to the hall 3.

  Thereafter, the elevator door control device 8 opens the car door 7. The landing door 4 of the landing 3 opens following the car door 7. Thereafter, the user gets into the car 6. Thereafter, the elevator door control device 8 closes the car door 7. The landing door 4 of the landing 3 follows the car door 7 and closes.

  When the user operates a button on the car operation panel 9, the elevator control device 10 moves the car 6 to the corresponding floor.

  Thereafter, the elevator door control device 8 opens the car door 7 at the landing on the floor. The landing door 4 of the landing 3 opens following the car door 7. Thereafter, the user gets out of the car 6. Thereafter, the elevator door control device 8 closes the car door 7. The landing door 4 of the landing 3 follows the car door 7 and closes.

Next, the elevator door apparatus will be described with reference to FIG.
FIG. 2 is a front view of the entrance / exit of the car when viewed from the inside of the elevator car to which the elevator door control apparatus according to Embodiment 1 of the present invention is applied.

  As shown in FIG. 2, the elevator door control device 8 includes a plurality of light projectors 8a, a plurality of light receivers 8b, a detection device 8c, and an adjustment device 8d.

  The plurality of light projectors 8 a are provided on one door contact side of the car door 7. The plurality of projectors 8a are provided side by side in the vertical direction. Each of the plurality of projectors 8 a emits light so as to cross the entrance / exit of the car 6.

  The plurality of light receivers 8 b are provided on the other door contact side of the car door 7. The plurality of light receivers 8b are provided side by side in the vertical direction corresponding to the plurality of light projectors 8a. Each of the plurality of light receivers 8b has a light receiving surface facing the corresponding projector 8a.

  The detection device 8c detects an object based on the light reception states of the plurality of light receivers 8b. For example, the detection device 8c detects a string-like object based on the light receiving states of the plurality of light receivers 8b when the car door 7 is closed. The adjusting device 8d adjusts the sensitivity of the plurality of light receivers 8b when the car door 7 is closed.

Next, an outline of a method for detecting the string-like object 11 will be described with reference to FIG.
FIG. 3 is a diagram for explaining an outline of a method for detecting an object of a string-like object by the elevator door control device according to the first embodiment of the present invention.

  In FIG. 3A, the car 6 is stopped at the landing 3. At this time, the difference between the height of the floor surface of the car 6 and the height of the floor surface of the hall 3 falls within a preset allowable range. The user exists in the car 6. On the other hand, the dog exists at the hall 3. One side of the string-like object 11 is connected to a dog. The other end of the string-like object 11 is held by the user. In this state, the landing door 4 and the car door 7 are closed. As a result, the string-like object 11 is sandwiched between the landing door 4 and the car door 7.

  Thereafter, as shown in FIG. 3B, the car 6 moves downward. At this time, the height of the floor surface of the car 6 is lower than the height of the floor surface of the hall 3. As a result, the string-like object 11 moves upward relative to the floor surface of the car 6 between one and the other of the car doors 7.

  Thereafter, as shown in FIG. 3C, the car 6 further moves downward. At this time, the height of the floor surface of the car 6 is further lower than the height of the floor surface of the hall 3. As a result, the string-like object 11 moves further upward relative to the floor surface of the car 6 between one and the other of the car doors 7.

  When the car 6 changes from the state shown in FIG. 3A to the state shown in FIG. 3C via the state shown in FIG. 3B, the elevator door control device 8 uses a plurality of light receivers 8b (in FIG. The light receiving state (not shown) also changes. Specifically, the light receiver 8b shielded by the string-like object 11 changes. The detection device 8c (not shown in FIG. 3) detects the string-like object 11 based on a change in the light receiving state of the plurality of light receivers 8b.

Next, a specific example of a method for detecting the string-like object 11 will be described with reference to FIG.
FIG. 4 is a diagram for explaining a specific example of a method for detecting a string-like object by the elevator door control device according to Embodiment 1 of the present invention. The horizontal axis in FIG. 4 indicates time. The vertical axis in FIG. 4 indicates the light receiving state of the plurality of light receivers 8b when the car 6 is lowered as in FIG.

  When the car 6 is stopped as shown in FIG. 3A, the string-like object 11 does not move with respect to the floor surface of the car 6 between the one side and the other side of the car door 7. As a result, the string-like object 11 shields light from the light receiver 8 b that is at the same height as the string-like object 11.

  When the car 6 descends as shown in FIGS. 3B and 3C, the string-like object 11 moves upward with respect to the floor surface of the car 6 between one and the other of the car doors 7. As a result, the string-like object 11 shields light from the upper light receiver 8b.

  The detecting device 8c detects the string-like object 11 when the light receiving device 8b that is shielded from light when the car 6 is lowered changes to the upper light receiving device 8b. Although not shown, the detection device 8c detects the string-like object 11 when the light receiver 8b that is shielded when the car 6 moves upward changes to the lower light receiver 8b.

Next, the state of the elevator will be described with reference to FIG.
FIG. 5 is a diagram for explaining the state of the elevator to which the elevator door control device according to Embodiment 1 of the present invention is applied.

  As shown in FIG. 5, the state of the elevator goes back and forth between the resting state and the operating state. When the preset time is reached when the elevator is in a resting state, the elevator is in a sensitivity setting state. When the elevator state becomes the sensitivity setting state, the adjustment device 8d starts adjusting the sensitivity of the plurality of light receivers 8b. When the elevator operation is started when the elevator state is the sensitivity setting state, the elevator state returns to the operation state. At this time, the adjustment device 8d interrupts the setting of the sensitivity of the plurality of light receivers 8b.

Next, the outline of the operation of the elevator door control device 8 will be described with reference to FIG.
FIG. 6 is a flowchart for explaining the outline of the operation of the elevator door control apparatus according to Embodiment 1 of the present invention.

  In step S1, the adjusting device 8d increases the sensitivity of the light receiver 8b to be adjusted by a certain amount. Thereafter, the process proceeds to step S2. In step S2, the adjustment device 8d confirms whether or not the light shielding of the light receiver 8b is detected.

  When the light shielding of the light receiver 8b is not detected in step 2, the process returns to step S1. If the light shielding of the light receiver 8b is detected in step S2, the process proceeds to step S3.

  In step S3, the adjusting device 8d records the current sensitivity of the light receiver 8b as the upper limit sensitivity. Thereafter, the process proceeds to step S4. In step S4, the adjustment device 8d sets the value obtained by subtracting the specified value from the upper limit sensitivity as the optimum sensitivity of the light receiver 8b. The specified value at this time is set in advance based on the diameter of the string-like object 11 to be detected. Thereafter, the process proceeds to step S5. In step S5, the adjusting device 8d sets the optimum sensitivity to the sensitivity of the light receiver 8b. Thereafter, the setting of the sensitivity of the next light receiver 8b is started.

  According to the first embodiment described above, the sensitivity of the plurality of light receivers 8b is adjusted when the car door 7 is closed. For this reason, the sensitivity of the light receiver 8b is set appropriately. As a result, it is possible to prevent erroneous detection of an object such as the string-like object 11 while maintaining the detection accuracy of the object such as the string-like object 11.

  Specifically, the adjusting device 8d gradually increases the light receiving sensitivity of each of the plurality of light receivers 8b. The adjusting device 8d sets the sensitivity of each of the plurality of light receivers 8b when the light shielding of each of the plurality of light receivers 8b is detected as the upper limit sensitivity of each of the plurality of light receivers 8b. The adjusting device 8d sets the value obtained by subtracting the specified value from the upper limit sensitivity of each of the plurality of light receivers 8b as the optimum sensitivity of each of the plurality of light receivers 8b. For this reason, erroneous detection of an object such as the string-like object 11 can be prevented more reliably.

  If the car door 7 is closed for some reason, the sensitivity of the light receiver 8b can be adjusted.

  For example, the sensitivity of the light receiver 8b may be adjusted while the elevator is stopped. In this case, the sensitivity of the light receiver 8b can be adjusted without reducing the operation efficiency of the elevator.

  For example, the sensitivity of the light receiver 8b may be adjusted while the car 6 is traveling. Specifically, the sensitivity of the light receiver 8b may be adjusted at a timing when the string-like object 11 is not detected. For example, the sensitivity of the light receiver 8b may be adjusted when the car 6 is traveling to respond to the hall call in a state where no car call is registered. For example, when the car 6 is running in a state where the value of the weighing device (not shown) of the car 6 is equal to or less than a certain value and it is determined that the user is not inside the car 6, the light receiver 8b Sensitivity may be adjusted. For example, the sensitivity of the light receiver 8b is adjusted when the car 6 travels a certain distance after starting to travel and travels at a position outside the range where the string-like object 11 may be detected. Also good. In this case, the sensitivity of the light receiver 8b can be adjusted in consideration of the sway of the car door 7 while the car 6 is traveling without lowering the operation efficiency of the elevator.

  For example, the sensitivity of the light receiver 8b may be adjusted during the self-diagnosis operation of the elevator. In this case, the sensitivity of the light receiver 8b can be adjusted in consideration of the sway of the car door 7 while the car 6 is traveling without lowering the operation efficiency of the elevator.

  Moreover, you may adjust only the sensitivity of some light receivers 8b.

  For example, only the sensitivity of the light receiver 8b existing in a preset height range may be adjusted. The height at this time may be set to a height at which the string-like object 11 is easily pinched. In this case, the time for adjusting the sensitivity of the light receiver 8b can be shortened.

  For example, when the planned traveling direction of the elevator car 6 is upward, the sensitivity of the light receiver 8b on the lower side of the plurality of light receivers 8b is adjusted, and the upper side of the plurality of light receivers 8b is adjusted. It is not necessary to adjust the sensitivity of the light receiver 8b. When the planned traveling direction of the elevator car 6 is downward, the sensitivity of the light receiver 8b on the upper side of the plurality of light receivers 8b is adjusted, and the lower side of the plurality of light receivers 8b is adjusted. It is not necessary to adjust the sensitivity of the light receiver 8b. In this case, only the sensitivity of the light receiver 8b necessary for detecting the string-like object 11 can be adjusted according to the traveling direction of the car 6.

  Alternatively, the plurality of light receivers 8b may be divided into a plurality of groups in the vertical direction, and the sensitivity of the light receivers 8b may be adjusted sequentially for each of the plurality of groups each time the car door 7 is closed. In this case, the time for adjusting the sensitivity of the light receiver 8b when the car door 7 is closed can be shortened.

Next, examples of the detection device 8c and the adjustment device 8d will be described with reference to FIG.
FIG. 7 is a hardware configuration diagram of a detection device and an adjustment device in the elevator door control device according to Embodiment 1 of the present invention.

  Each function of the detection device 8c and the adjustment device 8d is realized by a processing circuit. For example, the processing circuit includes at least one processor 12a and at least one memory 12b. For example, the processing circuit comprises at least one dedicated hardware 13.

  When the processing circuit includes at least one processor 12a and at least one memory 12b, the functions of the detection device 8c and the adjustment device 8d are realized by software, firmware, or a combination of software and firmware. At least one of software and firmware is described as a program. At least one of software and firmware is stored in at least one memory 12b. The at least one processor 12a reads out and executes a program stored in the at least one memory 12b, thereby realizing the functions of the detection device 8c and the adjustment device 8d. The at least one processor 12a is also referred to as a CPU (Central Processing Unit), a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a DSP. For example, the at least one memory 12b is a nonvolatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, or EEPROM, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD, or the like.

  If the processing circuit comprises at least one dedicated hardware 13, the processing circuit is, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination thereof. is there. For example, each function of the detection device 8c and the adjustment device 8d is realized by a processing circuit. For example, the functions of the detection device 8c and the adjustment device 8d are collectively realized by a processing circuit.

  About each function of the detection apparatus 8c and the adjustment apparatus 8d, a part may be implement | achieved by the hardware 13 for exclusive use, and another part may be implement | achieved by software or firmware. For example, the function of the detection device 8c is realized by a processing circuit as the dedicated hardware 13, and the function of the adjustment device 8d is read and executed by at least one processor 12a by reading a program stored in at least one memory 12b. May be realized.

  Thus, the processing circuit realizes the functions of the detection device 8c and the adjustment device 8d by the hardware 13, software, firmware, or a combination thereof.

Embodiment 2. FIG.
FIG. 8 is a flowchart for illustrating the outline of the operation of the elevator door control apparatus according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the same part as Embodiment 1, or an equivalent part. The description of this part is omitted.

  The adjustment device 8d according to the first embodiment obtains the optimum sensitivity when obtaining the upper limit sensitivity. On the other hand, the second embodiment adjustment device 8d may not obtain the optimum sensitivity when obtaining the upper limit sensitivity. Specifically, the adjusting device 8d according to the second embodiment performs the operations from step S11 to step S16 in FIG.

  Steps S11 to S13 in FIG. 8 are the same as steps S1 to S3 in FIG. After step S13, the process proceeds to step S14. In step S14, the adjustment device 8d sets a value obtained by subtracting the specified value from the upper limit sensitivity as a candidate for the optimum sensitivity of the light receiver 8b. Thereafter, the process proceeds to step S15.

  In step S15, the adjustment device 8d determines whether or not the absolute value of the difference between the optimum sensitivity candidate and the previous optimum sensitivity is larger than a preset allowable value.

  If the absolute value of the difference between the optimum sensitivity candidate and the previous optimum sensitivity is equal to or smaller than a preset allowable value in step S15, the setting of the sensitivity of the next optical receiver 8b is started without resetting the optimum sensitivity. Is done.

  If the absolute value of the difference between the optimal sensitivity candidate value and the previous optimal sensitivity is larger than the preset allowable value in step S15, the process proceeds to step S16. In step S16, the adjusting device 8d sets the optimum sensitivity candidate as the sensitivity of the light receiver 8b. Thereafter, the setting of the sensitivity of the next light receiver 8b is started.

  According to the second embodiment described above, the optimum sensitivity is not reset when the absolute value of the difference between the optimum sensitivity candidate and the previous optimum sensitivity is equal to or less than a preset allowable value. For this reason, it is possible to prevent the sensitivity setting of the light receiver 8b from changing suddenly.

  In the elevator door control device 8 that detects an object by one light projector 8a and one light receiver 8b, the sensitivity of the light receiver 8b is adjusted by the same method as in the first and second embodiments. Good. Also in this case, the sensitivity of one light receiver 8b is set appropriately. As a result, erroneous detection of an object can be prevented.

  Further, the elevator door control device 8 similar to that of the first and second embodiments may be applied to a single-open elevator door device.

  1 hoistway, 2 machine room, 3 landing, 4 landing door, 5 landing call button, 6 car, 7 car door, 8 control device, 8a projector, 8b light receiver, 8c detection device, 8d adjustment device, 9 car operation panel , 10 elevator control device, 11 string-like object, 12a processor, 12b memory, 13 hardware

Claims (11)

A projector that is provided in the elevator door device, and projects light so as to cross the entrance of the elevator;
A light receiver that is provided in the elevator door device and has a light receiving surface facing the projector;
A detection device for detecting an object based on a light receiving state of the light receiver;
An adjusting device for adjusting the sensitivity of the light receiver when the elevator door device is closed;
Elevator door control device.   The adjustment device gradually increases the light receiving sensitivity of the light receiver, sets the sensitivity of the light receiver when the light shielding of the light receiver is detected as an upper limit sensitivity, and subtracts a specified value from the upper limit sensitivity. The elevator door control device according to claim 1, wherein the sensitivity of the elevator is optimal.   The control device for an elevator door according to claim 1 or 2, wherein the adjusting device adjusts the sensitivity of the light receiver while the elevator is at rest.   3. The elevator door control device according to claim 1, wherein the adjustment device adjusts sensitivity of the light receiver during travel of the elevator car. 4. A plurality of projectors arranged side by side in the vertical direction in the elevator door device and projecting light so as to cross the entrance and exit of the elevator;
In the elevator door device, a plurality of light receivers that are provided side by side in the vertical direction corresponding to the plurality of light projectors and have a light receiving surface facing the corresponding light projector,
A detection device for detecting a string-like object based on a light receiving state of the plurality of light receivers;
An adjusting device for adjusting the sensitivity of the plurality of light receivers when the elevator door device is closed;
Elevator door control device.   The adjusting device gradually increases the light receiving sensitivity of each of the plurality of light receivers, and determines the sensitivity of each of the plurality of light receivers when the light shielding of each of the plurality of light receivers is detected. The elevator door control device according to claim 5, wherein a value obtained by subtracting a specified value from the upper limit sensitivity of each of the plurality of light receivers is set as the optimum sensitivity of each of the plurality of light receivers.   The said adjustment apparatus is a control apparatus of the elevator door of Claim 5 or Claim 6 which adjusts the sensitivity of these light receivers during the stop of the said elevator.   The control device for an elevator door according to claim 5 or 6, wherein the adjustment device adjusts the sensitivity of the plurality of light receivers during travel of the elevator car.   The control device for an elevator door according to claim 5 or 6, wherein the adjusting device adjusts the sensitivity of a light receiver existing within a preset height range.   The adjustment device adjusts the sensitivity of the light receiver on the lower side of the plurality of light receivers when the planned traveling direction of the elevator car is upward, and the upper part of the plurality of light receivers. Without adjusting the sensitivity of the receiver on the side of the elevator, when the planned traveling direction of the elevator car is downward, adjust the sensitivity of the receiver on the upper side of the plurality of receivers, The control device for an elevator door according to claim 5 or 6, wherein the sensitivity of the light receiver on the lower side of the plurality of light receivers is not adjusted.   The said adjustment apparatus divides | segments these several light receivers into a some group in a perpendicular direction, and adjusts the sensitivity of a light receiver in order for every said several group, whenever the said elevator door apparatus closes. The control apparatus of the elevator door of 6.

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