Operation panel of elevator and door device of elevator

Abstract

An operation panel of an elevator and a door device of the elevator capable of suppressing a decrease in detection accuracy. The operation panel of the elevator includes a detector, a first operation button including a first transmitter having a first detection surface and transmitting a detection signal indicating a change in electrostatic capacity caused by an object approaching the first detection surface, and a first signal line electrically connected to the first transmitter and the detector and transmitting the detection signal from the first transmitter to the detector. The first transmitter transmits an electric signal whose voltage value changes in correspondence with the amount of change in electrostatic capacity as the detection signal. The detector has an amplification section that amplifies the voltage value of the detection signal received from the first signal line, and a detection section that detects that the object has approached the first detection surface when it is determined that the voltage value of the detection signal amplified by the amplification section is greater than a prescribed threshold value.

Description

Technical Field

[0001] This invention relates to the control panel and door device of an elevator. Background Technology

[0002] Patent Document 1 discloses an elevator system. In this elevator system, an operation button is provided with a sensor that detects changes in electrostatic capacitance. According to this elevator system, the user can operate the button without contacting the sensor.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-124166 Summary of the Invention

[0006] However, in the sensor described in Patent Document 1, the change in electrostatic capacitance is sent to the part that detects the change via an electrical signal of voltage corresponding to the amount of change. At this time, the electrical signal is transmitted through a signal line, thereby reducing the voltage of the electrical signal. Therefore, the detection accuracy of the sensor is reduced.

[0007] This invention was made to solve the aforementioned problems. The object of this invention is to provide an elevator control panel and an elevator door device capable of suppressing the reduction in detection accuracy.

[0008] The elevator control panel of the present invention includes: a detector; a first operation button including a first transmitter having a first detection surface and transmitting a detection signal representing a change in electrostatic capacitance caused by an object approaching the first detection surface; and a first signal line electrically connected to the first transmitter and the detector, transmitting the detection signal from the first transmitter to the detector, wherein the first transmitter transmits an electrical signal whose voltage value changes in accordance with the change in electrostatic capacitance as a detection signal, and the detector includes: an amplification unit that amplifies the voltage value of the detection signal received from the first signal line; and a detection unit that detects that an object has approached the first detection surface when it is determined that the voltage value of the detection signal amplified by the amplification unit is greater than a predetermined threshold.

[0009] Furthermore, the elevator door device of the present invention comprises: a first transmitter disposed on a door panel, having a first detection surface, and transmitting a detection signal representing a change in electrostatic capacitance caused by an object approaching the first detection surface; a detector that detects an object approaching the first detection surface based on the detection signal; a controller that stops the operation of the door panel when the detector detects that an object has approached the first detection surface; and a first signal line electrically connected to the first transmitter and the detector, transmitting the detection signal from the first transmitter to the detector, wherein the first transmitter transmits an electrical signal whose voltage value changes in accordance with the change in electrostatic capacitance as a detection signal, and the detector comprises: an amplification unit that amplifies the voltage value of the detection signal received from the first signal line; and a detection unit that detects that an object has approached the first detection surface when it is determined that the voltage value of the detection signal amplified by the amplification unit is greater than a predetermined threshold.

[0010] Invention Effects

[0011] According to the present invention, the amplification unit amplifies the voltage value of the detection signal. When the detection unit determines that the voltage value of the amplified detection signal is greater than a predetermined threshold, it detects that an object is approaching the detection surface. Therefore, it is possible to suppress the decrease in detection accuracy. Attached Figure Description

[0012] Figure 1 This is an exploded perspective view of the elevator control panel in Implementation Method 1.

[0013] Figure 2 This is a plan view of the back of the control panel of the elevator in Embodiment 1.

[0014] Figure 3 This is a block diagram of the elevator control panel according to implementation method 1.

[0015] Figure 4 This is a graph showing the relationship between the amplification rate of the detection signal amplified by the control panel of the elevator in Embodiment 1 and the length of the signal line.

[0016] Figure 5 This is a graph showing the relationship between the detection distance of the elevator control panel and the length of the signal line in Embodiment 1.

[0017] Figure 6 This is a plan view of the elevator door device according to Embodiment 2.

[0018] Figure 7 This is a block diagram of the elevator door device according to Embodiment 2.

[0019] Label Explanation

[0020] 1: Control panel; 2: Box; 3: Panel; 3a: Button hole; 4: Non-contact button; 4a, 4b: Non-contact button; 5, 5a, 5b: Transmitter; 5s: Detection surface; 6: Mounting plate; 7: Detector; 8, 8a, 8b: Signal line; 9: Detection section; 10: Amplification section; 20: Door device; 21a, 21b: Door panel; 22: Drive motor; 23: Controller. Detailed Implementation

[0021] 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 simplified or omitted where appropriate.

[0022] Implementation Method 1

[0023] Figure 1 This is an exploded perspective view of the elevator control panel in Implementation Method 1. Figure 2 This is a plan view of the back of the control panel of the elevator in Embodiment 1.

[0024] exist Figure 1 In the elevator system shown, for example, the control panel 1 is located inside the car (not shown). Alternatively, the control panel 1 can also be located at a landing (not shown). For example, the control panel 1 is operated by operation buttons to receive input from the user regarding the destination floor. The control panel 1 sends the received destination floor information to a control panel (not shown). The control panel 1 includes a box 2, a face plate 3, and multiple contactless buttons 4.

[0025] For example, the housing 2 is shaped as a cuboid with one open side. The housing 2 is inserted into the side of the car with the open side facing the inside of the car. The panel 3 is configured to cover the open side of the housing 2. Multiple button holes 3a are provided on the front side of the panel 3.

[0026] Multiple contactless buttons 4 are respectively disposed at the locations of multiple button holes 3a as operating buttons. Each contactless button 4 has the same structure. Each contactless button 4 has a detection surface. The detection surface of the contactless button 4 faces the inside of the car among the multiple button holes 3a. The contactless button 4 is a button for detecting objects that exist within a range closer to the detection surface than the detection area. The contactless button 4 detects the change in electrostatic capacitance caused by the presence of this object.

[0027] like Figure 2 As shown, multiple contactless buttons 4, a mounting plate 6, and a detector 7 are installed on the back of panel 3. In addition, multiple signal lines 8 are arranged on the back side of panel 3.

[0028] The contactless button 4 has a transmitter 5 and an igniter (not shown).

[0029] exist Figure 2 Although not shown in the diagram, the transmitter 5 has a detection surface 5s, which serves as the detection surface for the contactless button 4. Furthermore, the detection surface 5s is shown in [the diagram / illustration text]. Figure 1 Instead Figure 2 Transmitter 5 sends a detection signal, which is an electrical signal that changes in voltage value in response to changes in electrostatic capacitance.

[0030] Specifically, transmitter 5 has a pair of electrodes (not shown). The pair of electrodes are arranged separately from each other. A reference voltage is applied to the pair of electrodes. The value of the reference voltage is determined by a reference electrostatic capacitance between the pair of electrodes. When an object is present near the detection surface 5s, the electrostatic capacitance between the pair of electrodes increases or decreases, thus changing from the reference electrostatic capacitance. Due to this change in electrostatic capacitance, the value of the voltage applied to the pair of electrodes changes from the value of the reference voltage. For example, the voltage of the detection signal is the voltage applied to the pair of electrodes. When the value of this voltage changes, the value of the voltage shown in the detection signal changes from the value of the reference voltage. That is, the voltage value of the detection signal changes correspondingly to the amount of change in the electrostatic capacitance between the pair of electrodes.

[0031] For example, the igniter is an LED. The igniter lights up when it receives a lighting command or when current flows through it.

[0032] Mounting plate 6 is fixed to the back of panel 3. On mounting plate 6, multiple contactless buttons 4 are installed in their respective positions.

[0033] For example, detector 7 is a substrate with multiple circuits. Detector 7 is fixed to the back of panel 3. For example, detector 7 is configured below mounting plate 6 on the back side of panel 3. Detector 7 creates information about the destination floor based on the detection signal and sends the created information to the control panel.

[0034] Multiple signal lines 8 are wires capable of transmitting electrical signals. One end of each signal line 8 is connected to a transmitter 5 of a plurality of contactless buttons 4. The other end of each signal line 8 is connected to a detector 7.

[0035] To reduce unnecessary wiring length, the lengths of the multiple signal lines 8 vary depending on the distance from the contactless button 4 to the detector 7. Figure 2 In the diagram, signal line 8a and signal line 8b are shown as the first and second signal lines among multiple signal lines 8. Signal line 8a connects the contactless button 4a (which serves as the first operation button) furthest from the detector 7 to the detector 7. Signal line 8b connects the contactless button 4b (which serves as the second operation button) closest to the detector 7 to the detector 7. Signal line 8a is longer than signal line 8b.

[0036] Detector 7 receives a detection signal from transmitter 5 via signal line 8. Detector 7 detects that the contactless button 4 has been activated based on the detection signal. In this case, detector 7 creates information about the destination floor corresponding to the contactless button 4 and sends it to the control panel. Furthermore, as a registration action, detector 7 illuminates the indicator light corresponding to the contactless button 4.

[0037] Next, use Figure 3 The detector 7 will be described.

[0038] Figure 3 This is a block diagram of the elevator control panel according to Embodiment 1. Additionally, in Figure 3 In the diagram, contactless buttons 4a and 4b are shown as the first and second operation buttons among a plurality of contactless buttons 4. Transmitter 5a and transmitter 5b are shown as the first and second transmitters among a plurality of transmitters 5. Signal lines 8a and 8b among a plurality of signal lines 8 are shown. Additionally, although not shown, transmitter 5a has a detection surface 5s serving as a first detection surface. Transmitter 5b has a detection surface 5s serving as a second detection surface.

[0039] like Figure 3 As shown, the detector 7 includes a detection unit 9 and an amplification unit 10.

[0040] The detection unit 9 can identify the non-contact button 4 that has emitted a detection signal. If the voltage value of the received detection signal is greater than a predetermined voltage threshold, the detection unit 9 detects that an object is approaching. Figure 3 The detection surface 5s is not shown in the diagram. When the detection unit 9 detects an object approaching the detection surface 5s, it determines the destination floor corresponding to the detection signal. The detection unit 9 creates information about the determined destination floor. The detection unit 9 sends the destination floor information to the control panel. At this time, the detection unit 9 illuminates the illuminator of the non-contact button 4 that issued the detection signal.

[0041] An amplification unit 10 is disposed between multiple signal lines 8 and a detection unit 9. The amplification unit 10 receives detection signals from the signal lines 8. The amplification unit 10 amplifies the voltage of the detection signal received from the signal line 8 at an amplification rate corresponding to the length of the signal line 8. The amplification rate represents the proportion of amplification from the original voltage. For example, the amplification rate is preset when the operation panel 1 is installed. The amplification unit 10 can independently set the amplification rate corresponding to each of the multiple signal lines 8. The amplification unit 10 sends the amplified detection signal to the detection unit 9. At this time, the amplification unit 10 sends the detection signal to the detection unit 9 while maintaining the correspondence between the detection signal and the signal line 8.

[0042] At least one of the detection unit 9 and the amplification unit 10 is implemented by processing circuitry on the substrate included in the detector 7. The processing circuitry may also include at least one processor and at least one memory. In this case, for example, the processor reads a program stored in the memory. The function of the detection unit 9 or the amplification unit 10 can also be implemented by the processor executing the program.

[0043] For example, a change in electrostatic capacitance occurs within the detection range of the transmitter 5a of the contactless button 4a. The transmitter 5a sends a detection signal indicating the amount of electrostatic capacitance change to the amplifier 10 via the signal line 8a. The amplifier 10 amplifies the voltage of the detection signal at a first amplification rate corresponding to the length of the signal line 8a. The amplifier 10 sends the amplified detection signal to the detection unit 9. The detection unit 9 determines whether the voltage value of the detection signal received from the amplifier 10 is greater than a voltage threshold. If it is determined that the voltage value of the detection signal is greater than the voltage threshold, the detection unit 9 identifies the contactless button 4a corresponding to the detection signal and creates information about the destination floor indicated by the contactless button 4a. Furthermore, the illuminator of the contactless button 4a is illuminated.

[0044] In addition, when the amplification unit 10 receives a detection signal from the contactless button 4b, it similarly amplifies the voltage of the detection signal with a second amplification rate corresponding to the length of the signal line 8b.

[0045] Next, use Figure 4 and Figure 5 The function of the magnification section 10 will be explained.

[0046] Figure 4 This is a graph showing the relationship between the amplification rate of the detection signal amplified by the control panel of the elevator in Embodiment 1 and the length of the signal line. Figure 5 This is a graph showing the relationship between the detection distance of the elevator control panel and the length of the signal line in Embodiment 1.

[0047] Figure 4 A graph showing the relationship between voltage amplification and the length of signal line 8 is presented. The horizontal axis represents the length of signal line 8, measured in mm. The vertical axis represents the voltage amplification by the amplification unit 10, measured as a percentage (%). The longer the signal line 8, the higher the amplification value is set.

[0048] Figure 5A graph showing the relationship between the detection distance of transmitter 5 and the length of signal line 8 is shown. The horizontal axis represents the length of signal line 8. The vertical axis represents the detection distance of transmitter 5. The detection distance is the maximum distance from the detection surface of transmitter 5 to the object that transmitter 5 can detect. For example, assume that the object is a human finger. When the detection unit 9 determines that the voltage value of the detection signal transmitted by transmitter 5 is greater than the voltage threshold, it is considered that it can be detected.

[0049] The point represented by the triangle represents the actual value when the amplification unit 10 does not amplify the voltage of the detection signal. The curve X represented by the dashed line is a graph showing the evolution trend of the actual value when the amplification unit 10 does not amplify the voltage of the detection signal.

[0050] When the amplification unit 10 does not amplify the voltage of the detection signal, the longer the signal line 8, the shorter the detection distance. This is because the voltage value of the detection signal decreases due to the internal resistance of the signal line 8. The longer the signal line 8, the greater the decrease in the voltage value of the detection signal. For example, if the transmitter 5 emits a detection signal with a voltage value exceeding the reference voltage value due to changes in electrostatic capacitance, a voltage decrease occurs due to the signal line 8, and thus, the voltage value shown by the detection signal may be lower than the reference voltage value.

[0051] The points indicated by circles represent the actual values ​​when the amplification unit 10 amplifies the voltage of the detection signal according to the length of the signal line 8. The curve Y, represented by the solid line, is a graph showing the evolution trend of the actual values ​​when the amplification unit 10 amplifies the voltage of the detection signal.

[0052] When the amplification unit 10 amplifies the voltage of the detection signal, the detection distance becomes approximately the same regardless of the length of the signal line 8. This is because the amplification of the detection signal voltage reduces the voltage value caused by the signal line 8. For example, the amplification rate is set so that the detection distance is consistent for all contactless buttons 4.

[0053] in addition, Figure 4 and Figure 5 This is just one example of the measured values; the specific values ​​for the length of signal line 8, amplification, and detection distance are not limited to these examples. Figure 4 and Figure 5 The values ​​shown.

[0054] According to Embodiment 1 described above, the operation panel 1 includes a first operation button including a transmitter 5 as a first transmitter, a detector 7, and a signal line 8 as a first signal line. The detector 7 includes a detection unit 9 and an amplification unit 10. The amplification unit 10 amplifies the voltage of the detection signal and sends it to the detection unit 9. The detection unit 9 detects that an object is approaching when the voltage value of the detection signal is greater than a predetermined threshold. Typically, in sensors that detect changes in electrostatic capacitance, the amount of change in electrostatic capacitance is small. There is a concern that even if a change in electrostatic capacitance that should be detected, i.e., a change in electrostatic capacitance exceeding the threshold, occurs, the voltage decreases during transmission through the signal line, and therefore the change is not detected by the detection unit 9. That is, there is a concern that the detection accuracy of the sensor composed of the transmitter 5, detector 7, and signal line 8 may be reduced. According to the operation panel 1 of this embodiment, the voltage of the detection signal that decreases during transmission through the signal line 8 can be restored by electrical amplification. Therefore, the reduction in the detection accuracy of the sensor can be suppressed. As a result, for example, in the non-contact button 4, it is possible to suppress the situation where the detection distance and detection range become smaller.

[0055] Alternatively, the control panel 1 may not be the non-contact button 4, but a touch button equipped with a transmitter 5. In this case, the touch button detects changes in electrostatic capacitance in the same way as the non-contact button 4. The touch button is activated by contact with a part of the human body. Even with a touch button, the voltage drop caused by the length of the signal line 8 can be suppressed, thus preventing a decrease in button detection accuracy.

[0056] Furthermore, the amplification unit 10 of the detector 7 amplifies the voltage of the detection signal with a first amplification rate corresponding to the length of the signal line 8. Therefore, the voltage of the detection signal can be amplified according to the actual length of the signal line 8 during wiring.

[0057] Furthermore, the amplification section 10 of detector 7 amplifies the voltage of the detected signal with a different amplification rate corresponding to the length difference between the first signal line and the second signal line. Typically, the number of floors the car needs to stop at when the control panel 1 is set up, the placement of buttons as required by the order, and other conditions vary from elevator to elevator system. On the other hand, the space inside the control panel 1 is somewhat fixed, and it is relatively narrow. Therefore, there are many constraints when deciding on the configuration of the equipment installed inside the control panel 1. For example, the placement of detector 7 is constrained by the placement of other equipment. Therefore, the lengths of the multiple signal lines 8 are not the same. In this embodiment, the amplification section 10 can be set with a different amplification rate corresponding to the signal lines 8 of different lengths. As a result, it is possible to suppress the decrease in sensor detection accuracy while ensuring the freedom of actual layout. Furthermore, it is possible to suppress deviations in the detection range of the multiple contactless buttons 4.

[0058] Implementation Method 2

[0059] Figure 6 This is a plan view of the elevator door assembly according to Embodiment 2. Furthermore, in Embodiment 2, parts that are identical or equivalent to those in Embodiment 1 are labeled with the same reference numerals. Descriptions of these parts are omitted.

[0060] exist Figure 6 In the elevator system shown, door assembly 20 is installed in the car. For example, door assembly 20 is a door that opens to the left and right. Door assembly 20 includes a pair of door panels 21a and 21b, a drive motor 22, a controller 23, multiple transmitters 5, detectors 7, and multiple signal lines 8.

[0061] A pair of door panels 21a and 21b are respectively located at the entrance and exit of the car. Although not shown in detail, the door panels 21a and 21b open and close in the directions of arrows D1 and D2, respectively, under the force of the drive motor 22. The controller 23 is located at the top of the car. The controller 23 controls the opening and closing states of the door panels 21a and 21b by controlling the action of the drive motor 22.

[0062] The plurality of transmitters 5 in Embodiment 2 have a structure that is substantially the same as that of the transmitter 5 in Embodiment 1. The detection surface 5s of the plurality of transmitters 5 in Embodiment 2 may also be larger than that of the detection surface 5s of the transmitter 5 in Embodiment 1.

[0063] Multiple transmitters 5 are disposed as non-contact sensors on a pair of door panels 21a and 21b. Several transmitters 5 are disposed on the side of door panel 21a facing the inside of the car. Transmitter 5a, acting as the first transmitter, is disposed on the lower part of door panel 21a. The remaining transmitters 5 are disposed on the side of door panel 21b facing the inside of the car. Transmitter 5b, acting as the second transmitter, is disposed on the upper part of door panel 21b. The detection surfaces 5s of each transmitter 5 face the inside of the car.

[0064] The detector 7 in Embodiment 2 has a structure substantially the same as that in Embodiment 1. The detector 7 is located on the upper part of the car. For example, the detector 7 is located above the door panel 21b. The detector 7 is electrically connected to the controller 23.

[0065] In Embodiment 2, the multiple signal lines 8 have a structure substantially the same as those in Embodiment 1. The lengths of the multiple signal lines 8 vary depending on the distance from the transmitter 5 to the detector 7. Figure 6 In the diagram, signal line 8a and signal line 8b are shown as the first and second signal lines among multiple signal lines 8. Signal line 8a connects transmitter 5a and detector 7. Signal line 8b connects transmitter 5b and detector 7. The length of signal line 8a is longer than the length of signal line 8b.

[0066] In embodiment 2, multiple transmitters 5 and detectors 7 function as safety devices for the door assembly 20. When the car arrives at a floor, the controller 23 opens a pair of closed door panels 21a and 21b via the drive motor 22. At this time, if a person inside the car has items near door panel 21a, these items may be caught in the gap between the opened door panel 21a and the car. To prevent entanglement, when an object is near door panels 21a and 21b, the transmitter 5 sends a detection signal indicating a change in electrostatic capacitance caused by the object. Based on the detection signal, the detector 7 sends a signal to the controller 23 indicating that an object has approached the detection surface for 5 seconds. Upon receiving this signal from the detector 7, the controller 23 stops the opening of the door panels 21a and 21b.

[0067] Next, use Figure 7 The detector 7 of Embodiment 2 will be described.

[0068] Figure 7 This is a block diagram of the elevator door device according to Embodiment 2. Additionally, Figure 7 Transmitter 5a and transmitter 5b are shown among multiple transmitters 5. Figure 7 Signal lines 8a and 8b are shown among the multiple signal lines 8.

[0069] like Figure 7 As shown, in Embodiment 2, the detector 7 has a detection section 9 and an amplification section 10 that are substantially the same as those in Embodiment 1.

[0070] When a change in electrostatic capacitance occurs in transmitter 5, transmitter 5 sends a detection signal. If the voltage value indicated by the received detection signal is greater than a predetermined voltage threshold, detection unit 9 detects that an object has approached the detection surface 5s. Furthermore, the voltage threshold is set based on the safe distance between the door panels 21a, 21b and the object. In this case, detection unit 9 sends a signal indicating that an object has approached the detection surface 5s to controller 23.

[0071] The amplification unit 10 amplifies the voltage of the detection signal received from the signal line 8 at an amplification ratio corresponding to the length of the signal line 8. The amplification unit 10 then sends the amplified detection signal to the detection unit 9.

[0072] According to Embodiment 2 described above, the gate device 20 includes a transmitter 5, a detector 7, a controller 23, and a signal line 8. The gate device 20 of this embodiment can restore the voltage of the detection signal that has decreased during transmission through the signal line 8. Therefore, it is possible to suppress the decrease in detection accuracy of the non-contact sensor composed of the transmitter 5, detector 7, and signal line 8. As a result, for example, in a non-contact sensor, it is possible to suppress the decrease in detection distance and detection range.

[0073] Alternatively, the transmitter 5 can be installed as a touch sensor on a pair of door panels 21a and 21b, instead of being a non-contact sensor. In this case, the touch sensor detects changes in electrostatic capacitance in the same way as the non-contact sensor. The touch sensor operates when an object comes into contact with the detection surface 5s. Even when it is a touch sensor, the voltage drop caused by the length of the signal line 8 can be suppressed, thus improving the sensor's detection accuracy.

[0074] Furthermore, the amplification unit 10 of the detector 7 amplifies the voltage of the detection signal at a different amplification rate corresponding to the length difference between the first signal line and the second signal line. Typically, the building structure, car structure, and door placement (as required by ordering) when the door device 20 is installed vary from system to system. On the other hand, the space formed by the door device 20 is somewhat predetermined. Moreover, this space is relatively narrow. Therefore, for example, there are many constraints when determining the wiring of the signal lines 8. Consequently, the lengths of the multiple signal lines 8 are not the same. In this embodiment, the amplification unit 10 can be set to a different amplification rate corresponding to the signal lines 8 of different lengths. As a result, it is possible to suppress the decrease in sensor detection accuracy while ensuring the freedom of actual layout. Furthermore, it is possible to suppress the deviation in the detection range of multiple non-contact sensors.

[0075] Alternatively, the non-contact sensor of Embodiment 2 can also be applied to landing doors as door devices. In this case, detector 7 can also send a signal indicating that an object has approached the detection surface for 5 seconds to the control panel. The control panel can then stop the opening and closing of the door device based on this signal.

Claims

1. An elevator control panel, wherein, The elevator's control panel is equipped with: Detector; The first operation button includes a first transmitter having a first detection surface and transmitting a detection signal representing a change in electrostatic capacitance caused by an object approaching the first detection surface. The first signal line is electrically connected to the first transmitter and the detector, and transmits the detection signal sent by the first transmitter to the detector; The second operation button includes a second transmitter having a second detection surface and transmitting a detection signal representing a change in electrostatic capacitance caused by an object approaching the second detection surface. as well as A second signal line, having a different length than the first signal line, is connected to the second transmitter and the detector, and transmits the detection signal sent by the second transmitter to the detector. The first transmitter and the second transmitter transmit electrical signals whose voltage values ​​change in accordance with the change in electrostatic capacitance as detection signals. The detector has: An amplification unit is configured with an amplification rate corresponding to each of the plurality of signal lines. The amplification unit amplifies the voltage value of the detection signal received from the first signal line with a first amplification rate corresponding to the length of the first signal line, and amplifies the voltage value of the detection signal received from the second signal line with a second amplification rate. The second amplification rate is an amplification rate corresponding to the length of the second signal line and has a value different from the value of the first amplification rate. as well as The detection unit detects that an object is approaching the first detection surface when it determines that the voltage value of the detection signal from the first signal line amplified by the amplification unit is greater than a predetermined threshold, and detects that an object is approaching the second detection surface when it determines that the voltage value of the detection signal from the second signal line amplified by the amplification unit is greater than the threshold.

2. The elevator control panel according to claim 1, wherein, The first operation button is a touch button or a non-contact button.

3. The elevator control panel according to claim 1 or 2, wherein, The first signal line is longer than the second signal line. The first magnification is greater than the second magnification.

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