JP2010239560A - Multiple optical axis photoelectric sensor, projector, and light receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple optical axis photoelectric sensor, a projector, and a light receiver, capable of recognizing an indicating lamp with economy regardless of a mounted state. <P>SOLUTION: First indicating lamps (16, 23) and second indicating lamps (15, 24) are disposed in either a projector 10 or a light receiver 11. The multiple optical axis photoelectric sensor includes: the first indicating lamps (16, 23) disposed in a side on a dangerous region R1 (a first region) with an optical axis 13 interposed therebetween and displaying a predetermined state of the multiple optical axis photoelectric sensor 1; the second indicating lamps (15, 24) disposed in a side on a non-dangerous region R2 (a second region) with an optical axis 13 interposed therebetween and displaying a predetermined state of the multiple optical axis photoelectric sensor 1; and a lighting control means for changing the lighting mode of the first indicating lamps (16, 23) and the second indicating lamps (15, 24). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a multi-optical axis photoelectric sensor.

  2. Description of the Related Art Conventionally, a wide photoelectric sensor (multi-optical axis photoelectric sensor) in which work indicator lamps that emit visible light (green light) are provided on both sides of a sensor element array including at least one of a light emitting element array and a light receiving element array. It has been known. According to this wide photoelectric sensor, the operator can visually recognize the visible light emitted from the work indicator lamp on either side across the optical path emitted from the light emitting element to reach the light receiving element.

JP-A-2005-123805

In general, the side on which the operator views the multi-optical axis photoelectric sensor in the attached state is almost determined. For this reason, when work indicator lamps are provided on both the left and right sides of the optical axis, there is a problem that the work indicator lamps provided on the side opposite to the side where the operator views the multi-optical axis photoelectric sensor are wasted.
In addition, the worker may see the multi-optical axis photoelectric sensor from either side in the attached state, but even in that case, it may be sufficient to see it from at least one side. For example, there is a case where a dangerous area and a non-dangerous area (safe area) are partitioned by a multi-optical axis photoelectric sensor in order to protect from the dangerous area. In this case, it is only necessary to confirm the work indicator light from at least the safe area side, and it is useless if the work indicator lamp provided on the dangerous area side is turned on in the same lighting manner as the safe area side.
The present invention has been completed based on the above circumstances, and an object of the present invention is to provide a multi-optical axis photoelectric sensor capable of recognizing an indicator lamp without waste regardless of the attached state.

A first invention is a multi-optical axis photoelectric sensor, a projector having a plurality of light projecting elements, a light receiver having a plurality of light receiving elements for receiving light emitted from the corresponding light projecting elements, Detecting means for detecting the presence or absence of an object on the optical axis from each light projecting element to each light receiving element based on whether or not the light emitted from the light projecting element is received by the corresponding light receiving element; A first indicator lamp and a second indicator lamp provided in at least one of the projector and the receiver, provided on one side surface in a direction perpendicular to the arrangement direction of the optical axes. A first indicator that displays a predetermined state of the multi-optical axis photoelectric sensor, and a second indicator that is provided on the other side surface and displays the predetermined state of the multi-optical axis photoelectric sensor. Difference between the first indicator lamp and the second indicator lamp Lights in the manner.
According to this invention, it is possible to recognize the first indicator lamp and the second indicator lamp without waste regardless of the attached state.

The second invention is the multi-optical axis photoelectric sensor of the first invention, comprising a lighting control means for changing a lighting mode of the first indicator lamp and the second indicator lamp.
According to the present invention, by changing the lighting mode of the first indicator lamp and the second indicator lamp according to the attachment state, the first indicator lamp and the second indicator lamp can be used without waste regardless of the attachment state. Can be recognized.

A third invention is the multi-optical axis photoelectric sensor of the first or second invention, wherein either one of the first indicator lamp and the second indicator lamp is turned on or blinked, and the other is always set. A lighting control means for turning off the light is provided.
According to the present invention, the first indicator lamp and the second indicator lamp can be recognized without waste by constantly turning off the indicator lamp provided on the side opposite to the side where the operator views the multi-optical axis photoelectric sensor. be able to.

A fourth invention is the multi-optical axis photoelectric sensor according to any one of the first to third inventions, wherein the lighting control switches between the lighting mode of the first indicator lamp and the lighting mode of the second indicator lamp. Means.
According to this invention, it can always be made to light with the same lighting mode from the one side of the direction orthogonal to the arrangement direction of the said optical axis, and the other side irrespective of an attachment state.

A fifth invention is the multi-optical axis photoelectric sensor of any one of the first to fourth inventions, wherein the first indicator lamp extends over at least one of the plurality of light projecting elements and the plurality of light receiving elements. The second indicator lamp has a length straddling at least one of the plurality of light projecting elements and the plurality of light receiving elements.
According to this invention, the visibility of the first indicator lamp and the second indicator lamp can be enhanced.

  According to the present invention, an operator can easily know whether the user is on the first region side or the second region side.

The schematic diagram of the multi-optical axis photoelectric sensor which concerns on one Embodiment of this invention. The schematic diagram which shows a mode that the multi-optical axis photoelectric sensor was installed from upper direction. The front view of a floodlight. The side view of the left side of a floodlight. The side view of the right side of a projector. The block diagram which shows the electrical constitution of a multi-optical axis photoelectric sensor.

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS.
(1) Configuration of multi-optical axis photoelectric sensor FIG. 1 is a schematic diagram of a multi-optical axis photoelectric sensor 1 according to Embodiment 1 of the present invention. The multi-optical axis photoelectric sensor 1 includes a projector 10 and a light receiver 11 that are arranged to face each other. In FIG. 1, a part of the shapes of the projector 10 and the light receiver 11 is schematically omitted. Specific shapes of the projector 10 and the light receiver 11 are as shown in FIGS.

  FIG. 2 is a schematic view of the multi-optical axis photoelectric sensor 1 installed as viewed from above. The multi-optical axis photoelectric sensor 1 is installed so as to partition a dangerous area R1 and a non-dangerous area R2 that can be harmful to an operator, such as in the vicinity of a press machine in a factory, with an optical axis 13 between the projector 10 and the light receiver 11. The presence or absence of an object on the optical axis 13 is detected based on whether or not the light emitted from the light projecting element 14 (see FIG. 3) is received by the light receiving element 22 (see FIG. 1).

(1-1) Projector FIG. 3 is a front view of the projector 10. The light projector 10 has a prismatic shape extending vertically, and a plurality of light projecting elements 14 are arranged in a line in the vertical direction on the surface (front surface) facing the light receiver 11.
A left large application indicator lamp 15 (an example of a second indicator lamp) extending in the vertical direction is provided on the left side of the light projecting element 14 on the front side of the projector 10, and a right large application extending in the vertical direction is also provided on the right side. An indicator lamp 16 (an example of a first indicator lamp) is provided. The left large application indicator lamp 15 has a length straddling the plurality of light projecting elements 14, and the right large application indicator lamp 16 has a length straddling the plurality of light projecting elements 14.

  These left and right large application indicator lamps 15 and 16 are for displaying an operation state (an example of a predetermined state) of the multi-optical axis photoelectric sensor 1. The operation state of the multi-optical axis photoelectric sensor 1 includes a detection state in which an object on the optical axis 13 can be detected when the power is turned on, and a non-detection state in which an object on the optical axis 13 cannot be detected by turning off the power The left and right large application indicator lights 15 and 16 are turned on to indicate that the multi-optical axis photoelectric sensor 1 is in a detection state, and are always turned off to indicate that it is in a non-detection state. .

Hereinafter, the left and right large application indicator lights 15 and 16 will be described more specifically.
A long hole extending in the vertical direction along the left side of the row of the light projecting elements 14 is formed on the front surface of the projector 10, and the long hole is blocked by a colorless and transparent member 17 (resin member, glass, etc.). Yes. Here, a resin member will be described as an example of the colorless and transparent member 17. A plurality of LEDs (not shown) that emit green light are arranged apart from each other in the vertical direction on the back side of the resin member 17 (inside the projector 10), and LEDs (not shown) that emit red light are vertically arranged. A plurality are arranged apart from each other in the direction. These LEDs constitute the left large application indicator lamp 15. The light source of the left large application indicator lamp 15 may be other than the LED, and any light source may be used as long as it emits visible light.

  Similarly, a long hole extending in the vertical direction along the right side of the row of the light projecting elements 14 is formed in the front surface of the projector 10, and the long hole is blocked by a colorless and transparent member 18. A plurality of LEDs (not shown) that emit green light are spaced apart from each other in the vertical direction on the back side of the resin member 18 (inside the projector 10), and LEDs (not shown) that emit red light are vertically arranged. A plurality are arranged apart from each other in the direction. These LEDs constitute the large right application indicator lamp 16.

  FIG. 4 is a left side view of the projector 10. A long hole extending in the vertical direction is formed on the left side surface of the projector 10 (an example of “one side surface in a direction orthogonal to the arrangement direction of the optical axes 13”), and the long hole is formed by the colorless and transparent resin member 19. Is blocked. By forming a long hole in the left side surface of the projector 10, the operator can visually recognize the light emitted from the left large application indicator lamp 15 from the left side of the projector 10.

  FIG. 5 is a right side view of the projector 10. A long hole extending in the vertical direction is also formed on the right side surface (an example of “the other side surface”) of the projector 10, and the long hole is blocked by the colorless and transparent resin member 20. By forming a long hole in the right side surface of the projector 10, the operator can visually recognize the light emitted from the right large application indicator lamp 16 from the right side of the projector 10.

  The left large application indicator lamp 15 and the right large application indicator lamp 16 are arranged such that the center in the vertical direction is located at the center in the vertical direction of the projector 10. Therefore, even if the projector 10 is installed upside down, the vertical position of the large application indicator lamp is constant.

  Returning to FIG. 3, an information display unit 21 for notifying various states of the multi-optical axis photoelectric sensor 1 is provided on the front surface of the projector 10. The information display unit 21 includes a digital error indicator lamp that displays a number corresponding to the error when an operation error occurs in the multi-optical axis photoelectric sensor 1, a multi-optical axis photoelectric sensor depending on lighting / extinction, or a difference in lighting color. Several LED etc. which alert | report the various states of the sensor 1 are provided.

(1-2) Light Receiver The external appearance of the light receiver 11 is substantially the same as the external appearance of the projector 10, and has a prismatic shape extending up and down. As shown in FIG. 1, the light receiver 11 has a plurality of light receiving elements 22 paired with the light projecting elements 14 arranged in a line along the vertical direction on the surface facing the light projector 10, and is similar to the light projector 10. The left large application indicator lamp 23 (an example of a first indicator lamp) and the right large application indicator lamp 24 (an example of a second indicator lamp) are provided.

(1-3) Arrangement Position of Light Emitting Element, Light Receiving Element, and Large App Indicator Light As shown in FIGS. 1 and 3, the number of light projecting elements 14 and light receiving elements 22 is 16 respectively, and the same order in the vertical direction. The light projecting element 14 and the light receiving element 22 arranged in the above are normal counterparts. As will be described in detail later, the light receiving signal that each light receiving element 22 receives and outputs the light is received by the light receiving circuit 40 only when the light from the light projecting element 14 that is a normal counterpart is received.

  As shown in FIG. 3, the light projecting element 14 is disposed on the upper and lower sides with the vertical center of the projector 10 as a boundary. When the projector 10 is installed upside down, the light receiving element 22 that is the counterpart of each light projecting element 14 is replaced with that before the projector is installed upside down, but the light emitted from each light projecting element 14 is any one of the light receiving elements. 22 receives light. That is, the projector 10 can be installed upside down.

  As shown in FIG. 1, the light receiving element 22 is also arranged in the vertical direction with the vertical center of the light receiver 11 as a boundary. When the light receiver 11 is installed upside down, the light projecting elements 14 that are the counterparts of the respective light receiving elements 22 are replaced with those before being installed upside down, but each light receiving element 22 is emitted from one of the light projecting elements 14. Receive light. That is, the light receiver 11 can also be installed upside down.

  As described above, the left and right large application indicator lamps 15 and 16 are arranged such that the center in the vertical direction coincides with the center of the projector 10. For this reason, even if the projector 10 is turned upside down, the vertical position of the large application indicator lamps 15 and 16 is constant. The same applies to the left and right large application indicator lamps 23 and 24 provided in the light receiver 11.

(2) Electrical configuration of multi-optical axis photoelectric sensor FIG. 6 is a block diagram showing an electrical configuration of the multi-optical axis photoelectric sensor 1.
The projector 10 includes a projector circuit 30, a projector element 14, left and right large application indicator lamps 15 and 16, an information display unit 21, and the like. In the drawing, the left large application indicator lamp 15 is abbreviated as the left indicator lamp 15, and the right large application indicator lamp 16 is abbreviated as the right indicator lamp 16.

  The light projecting circuit 30 (an example of the lighting control means) operates based on a predetermined clock pulse signal, and sequentially supplies a drive signal from the upper light projecting element 14 to the lower light projecting element 14 to perform this operation. By repeating with a high cycle, light is sequentially emitted from the light projecting element 14 on the upper side of the projector 10. When the projector 10 is installed upside down, for example, by changing the setting, it is assumed that the drive signal is sequentially given from the upper projector element 14.

The light projecting circuit 30 is provided with an input terminal 31 (an example of lighting control means) for inputting a lighting control signal for changing the lighting mode of the large application indicator lamps 15 and 16 from the outside.
Here, in the present embodiment, the lighting mode refers to a combination of the color of emitted light and the lighting, constant extinction, or blinking of the LED. For blinking, there may be a plurality of blinking patterns by changing the blinking interval. The administrator of the multi-optical axis photoelectric sensor 1 inputs a lighting control signal from the input terminal 31, for example, the left large application indicator lamp 15 blinks red, and the right large application indicator lamp 16 lights green. As described above, the lighting modes of the left and right large application indicator lamps 15 and 16 can be independently changed.

  In addition, when each large application indicator light 15 and 16 can emit only a single color, each lighting mode is different from each other only in LED lighting, always off, or flashing, and conversely, LED lighting, always off, or When the blinking cannot be changed, each lighting mode is different from each other only in the color to emit light.

  In the present embodiment, it is assumed that the lighting mode of the left large application indicator lamp 15 is set to “lights red” and the lighting mode of the right large application lamp 16 is set to “lights green” in the initial setting. Since the lighting mode of the left large app indicator 15 is “lit red” and the lighting mode of the right large app indicator 16 is “green”, at least the initial setting state of the left large app indicator 15 The lighting mode and the lighting mode of the right large application indicator lamp 16 are different from each other.

  The multi-optical axis photoelectric sensor 1 may be configured so that the left large application indicator lamp 15 and the right large application indicator lamp 16 can be lit in different lighting modes, and the lighting mode is not necessarily different. .

  The light receiver 11 includes a light receiving circuit 40 (an example of a detection unit and a lighting control unit), a light receiving element 22, left and right large application display lamps 23 and 24, a plurality of switch elements 41, a shift register 42, an information display unit 43, and the like. Configured. In the figure, the left large application indicator lamp 23 is abbreviated as the left indicator lamp 23, and the right large application indicator lamp 24 is abbreviated as the right indicator lamp 24. In FIG. 1, the information display unit 43 is omitted.

  One lead portion of the switch element 41 is connected to the output terminal of each light receiving element 22, and the other lead portion is commonly connected to the input terminal of the light receiving circuit 40. Each switch element 41 has a control terminal, and the control terminal is connected to the output terminal of the light receiving circuit 40 via the shift register 42.

The light receiving circuit 40 sequentially outputs the drive signal to each switch element 41 via the shift register 42 to turn on each switch element 41 in order, and only the light received signal of the light receiving element 22 connected to the turned on switch element 41 is received. The light is received by the light receiving circuit 40.
The light receiving circuit 40 takes in the clock pulse signal described above from the light projecting circuit 30 via the line L1, and turns on a predetermined switch element 41 in synchronization with the clock pulse signal. Specifically, the light receiving circuit 40 receives light arranged in the same order as the light projecting elements 14 at the moment when the light projecting elements 14 of a predetermined order among the light projecting elements 14 arranged in a line in the vertical direction emit light. Only the switch element 41 connected to the element 22 is turned on. Thus, the light receiving signal output from the light receiving element 22 is taken into the light receiving circuit 40 only when each light receiving element 22 receives light from the light projecting element 14 of the other party. When the light receiver 11 is installed upside down, it is assumed that the upper light receiving element 22 is sequentially turned on, for example, by changing the setting.

  The light receiving circuit 40 checks the magnitude relationship between the predetermined reference voltage Vc1 and the received light reception signal in synchronization with the timing of sequentially turning on / off the switch elements 41. When there is an object on the optical axis 13, the light emitted from the light projecting element 14 is blocked by the object, and the light reception signal output from the light receiving element 22 becomes smaller than the reference voltage Vc1. The light receiving circuit 40 detects the presence / absence of an object on the optical axis 13 based on whether or not all the received light signals sequentially taken in exceed the reference voltage Vc1.

  The light receiving circuit 40 is provided with an output terminal 44, and the light receiving circuit 40 outputs a detection signal that is inverted according to the detection result from the output terminal 44. The presence or absence of an object on the optical axis 13 can be known by connecting an external control device to the output terminal 44 and monitoring the detection signal by the control device.

  The light receiving circuit 40 is provided with an input terminal 45 (an example of a lighting control means) for inputting a lighting control signal for changing the lighting mode of the large application indicator lamps 23 and 24 from the outside. By inputting a lighting control signal from the input terminal 45, the lighting mode of the left and right large application indicator lamps 23 and 24 can be independently changed.

  In the present embodiment, the lighting mode of the right large application indicator lamp 24 provided in the light receiver 11 is set to be the same as the lighting mode of the left large application indicator lamp 15 provided in the projector 10, and is provided in the light receiver 11. The lighting mode of the left large application indicator lamp 23 is set to be the same as the lighting mode of the right large application indicator lamp 16 provided in the projector 10. Therefore, in the case of the light receiver 11, the lighting mode of the left large application indicator lamp 23 is set to “green lighting” and the lighting mode of the right large application indicator lamp 24 is set to “red lighting” in the initial setting. Has been.

(3) Operation of the multi-optical axis photoelectric sensor When the multi-optical axis photoelectric sensor 1 is turned on, the left and right large application indicator lamps 15 and 16 provided in the projector 10 and the left and right application indicators 11 provided in the light receiver 11 are used. The large application indicator lamps 23 and 24 are lit.

  When the lighting mode remains the initial setting, when each large application indicator lights up, an operator in the dangerous area R1 (first area) gives a first indicator lamp (projector) as shown in FIG. The green light emitted from the right large application display lamp 16 on the right side and the large application display lamp 23 on the left side of the light receiver 11 is visually recognized. Thereby, the worker can intuitively understand that the other side of the multi-optical axis photoelectric sensor 1 is the non-hazardous region R2 and that he is currently in the dangerous region R1.

  On the other hand, as shown in FIG. 2, an operator in the non-hazardous area R2 (second area) displays the second indicator lamp (the left large application display lamp 15 of the projector 10 and the right large application display of the light receiver 11). The red light emitted from the lamp 24) is visible. As a result, the operator can intuitively understand that the other side of the multi-optical axis photoelectric sensor 1 is the dangerous region R1, and that he is currently in the non-hazardous region R2.

  For example, when the entry to the dangerous area R1 side is prohibited, the first display lamp that is visually recognized from the dangerous area R1 side can be recognized without any waste by changing the lighting mode so that it always turns off. It can be performed. In this case, for example, when only the projector 10 is installed upside down, the lighting mode of the first indicator lamp for the projector 10 is changed to lighting, and the lighting mode of the second indicator lamp is changed to always off, Since the second indicator lamp visually recognized from the danger region R1 side is always turned off, the indicator lamp can be recognized without waste regardless of the attached state.

  Alternatively, for example, as shown in FIG. 2, when it is set so that green light is emitted on the dangerous region R1 side and red light is emitted on the non-dangerous region R2 side, only the light receiver 11 is moved up and down. When installed reversely, the lighting color of the right large application indicator lamp 24 for the light receiver 11 is changed to green, and the lighting color of the left large application indicator lamp 23 is changed to red. The waste that light is emitted can be reduced, that is, the indicator light can be recognized without waste regardless of the attached state.

(4) Effect of Embodiment According to the multi-optical axis photoelectric sensor 1 according to Embodiment 1 of the present invention described above, it is possible to recognize the indicator lamp without waste regardless of the attached state.

  Furthermore, according to the multi-optical axis photoelectric sensor 1, the lighting state of the first indicator lamps (16, 23) and the second indicator lamps (15, 24) is changed according to the attachment state, thereby changing the attachment state. Therefore, the first indicator lamp and the second indicator lamp can be recognized without waste.

  Furthermore, according to the multi-optical axis photoelectric sensor 1, the position of the left large application display lamp 15 and the position of the right large application display lamp 16 can be prevented from shifting up and down even when the projector 10 is arranged upside down. .

  Furthermore, according to the multi-optical axis photoelectric sensor 1, the position of the right large app display lamp 24 and the position of the left large app display lamp 23 can be prevented from shifting up and down even when the light receiver 11 is disposed upside down. it can.

  Furthermore, according to the multi-optical axis photoelectric sensor 1, the lighting color of the first indicator lamp and the lighting color of the second indicator lamp are different, so that the worker is in the dangerous area R1 or the non-dangerous area R2. Can be easily known.

  Furthermore, according to the multi-optical axis photoelectric sensor 1, the lighting mode of the first indicator lamp and the second indicator lamp can be controlled from the outside. For example, whether the default lighting mode is in the dangerous area R1 or the non-dangerous area R2 If it is difficult for the operator to intuitively understand whether he / she is in the room, the lighting mode can be appropriately changed to an easy-to-understand lighting mode.

  Furthermore, according to the multi-optical axis photoelectric sensor 1, the left and right large application indicator lamps 15, 16 provided in the projector 10 have a length straddling a plurality of projector elements 14, and are provided in the light receiver 11. Since the left and right large application indicator lamps 23 and 24 have a length over the plurality of light receiving elements 22, the visibility of each large application indicator lamp can be improved.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  (1) In the said embodiment, the 1st indicator lamp visible from the dangerous region R1 (1st area | region) side is made to light in green, and the 2nd visible from the non-dangerous area R2 (2nd area | region) side. The case where the indicator lamp is lit in red has been described as an example. For example, the lighting color of the first indicator lamp and the lighting color of the second indicator lamp are made the same, the first indicator lamp blinks, The lighting mode may be varied by lighting the indicator lamp.

  (2) In the above embodiment, the case where the first indicator lamp is lit in green and the second indicator lamp is lit in red has been described as an example. However, an operator in one of the areas is informed of the operation state. If it is not necessary, the indicator lamp on the area side that does not need to be notified may be turned off. Thereby, useless power consumption can be suppressed.

  (3) In the above embodiment, a large-sized application indicator lamp is configured by a colorless and transparent resin member, an LED that emits green light, and an LED that emits red light. However, an LED that emits white light and transmits light. A large application indicator lamp may be configured with a red or green resin member.

(4) In the above embodiment, when the multi-optical axis photoelectric sensor 1 is in the detection state, both the first indicator lamp and the second indicator lamp are lit, and when the multi-optical axis photoelectric sensor 1 is in the non-detection state, the first indicator lamp and the second indicator lamp Although the case where both the indicator lamps are turned off has been described as an example, the second indicator lamp and the first indicator lamp may be turned on even in the non-detection state.
For example, when the multi-optical axis photoelectric sensor 1 is in a non-detection state, both the second indicator light and the first indicator light emit green, and when the multi-optical axis photoelectric sensor is in a detection state, the non-hazardous region R2 (second Only the second indicator that is visible from the side of (1) may be automatically changed from green to red. That is, you may make it change a lighting mode according to an operation state. Thereby, the operator can know the operation state of the multi-optical axis photoelectric sensor 1 in more detail from the lighting state of the first indicator lamp and the second indicator lamp.

  (5) In the above embodiment, the projector 10 is provided with the first indicator light (right large app indicator 16) and the second indicator (left large app indicator 15). However, for example, the projector 10 is provided with only the first indicator lamp, and the second indicator lamp (right large app indicator lamp 23) and the second indicator lamp (right large app indicator lamp 24) are provided. Only the second indicator lamp may be provided in the light receiver 11. Or conversely, the projector 10 may be provided with only the second indicator lamp, and the light receiver 11 may be provided with only the first indicator lamp.

  (6) In the above embodiment, the case where the lighting mode of the first indicator lamp and the lighting mode of the second indicator lamp are independently changed has been described as an example. For example, the lighting mode of the first indicator lamp and the lighting mode of the first indicator lamp You may provide the lighting control means which switches the lighting mode of 2 indicator lamps. Specifically, for example, if the first indicator lamp is lit in green and the second indicator lamp is lit in red, the lighting control means changes the first indicator lamp to lit in red. The second indicator light may be changed to light up in green. As a result, it is possible to always light in the same lighting mode from one side or the other side in the direction orthogonal to the arrangement direction of the optical axes, regardless of the attached state, and the administrator of the multi-optical axis photoelectric sensor It is possible to reduce the work of switching the lighting mode of the first indicator lamp and the second lighting mode.

DESCRIPTION OF SYMBOLS 1 ... Multi-optical axis photoelectric sensor 10 ... Light projector 11 ... Light receiver 13 ... Optical axis 14 ... Light projector element 15 ... Left large app display light (2nd display light)
16 ... Right large app indicator (first indicator)
17 ... Resin member (second indicator)
18 ... Resin member (first indicator lamp)
19 ... Resin member (second indicator)
20 ... Resin member (first indicator lamp)
22... Light receiving element 23... Large left side application indicator (first indicator)
24 ... Right large app indicator (second indicator)
30 ... Light projection circuit (lighting control means)
31 ... Input terminal (lighting control means)
40: Light receiving circuit (detection means, lighting control means)
45 ... Input terminal (lighting control means)

Claims (5)

A projector having a plurality of projector elements;
A light receiver having a plurality of light receiving elements for receiving light emitted from the corresponding light projecting elements;
Detection means for detecting the presence or absence of an object on the optical axis from each light projecting element to each light receiving element based on whether or not the light emitted from each light projecting element is received by the corresponding light receiving element. When,
A first indicator lamp and a second indicator lamp provided in at least one of the projector and the receiver, provided on one side surface in a direction orthogonal to the arrangement direction of the optical axes, A first indicator that displays a predetermined state of the multi-optical axis photoelectric sensor, and a second indicator that is provided on the other side surface and displays the predetermined state of the multi-optical axis photoelectric sensor;
With
A multi-optical axis photoelectric sensor in which the first indicator lamp and the second indicator lamp are lit in different lighting modes. The multi-optical axis photoelectric sensor according to claim 1,
A multi-optical axis photoelectric sensor comprising lighting control means for changing a lighting mode of the first indicator lamp and the second indicator lamp. The multi-optical axis photoelectric sensor according to claim 1 or 2,
A multi-optical axis photoelectric sensor comprising lighting control means for turning on or blinking one of the first indicator lamp and the second indicator lamp and constantly turning off the other. The multi-optical axis photoelectric sensor according to any one of claims 1 to 3,
A multi-optical axis photoelectric sensor comprising lighting control means for switching between a lighting mode of the first indicator lamp and a lighting mode of the second indicator lamp. The multi-optical axis photoelectric sensor according to any one of claims 1 to 4,
The first indicator lamp has a length across at least one of the plurality of light projecting elements and the plurality of light receiving elements,
The second indicator lamp is a multi-optical axis photoelectric sensor having a length extending over at least one of the plurality of light projecting elements and the plurality of light receiving elements.

Images