JPH11112320A - Photoelectric sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate sensitivity adjusting work and setting work and to miniaturize a photoelectric sensor in the case that light reception sensitivity can be adjusted or various settings are realized. SOLUTION: A mode change-over switch SW1 and a lever-type switch SW2 are provided for a control panel. The lever-type switch SW2 is constituted so that it switching-operates against the depression operation and the slanting operation of an operation lever 19. When the mode change-over switch SW1 is changed over to a setting mode and the mode change-over lever 19 is depressed, a setting item can be switched, and a setting content in respective setting items can be changed when the operation lever 19 is slanted. When the mode change-over switch SW1 is changed over to a sensitivity adjusting mode and the operation lever 19 is depressed, sensitivity can automatically be adjusted and sensitivity can be manually adjusted when a slanting operation is executed. Thus, operability is superior and the sensor can be miniaturized since only the operation lever 19 is to be operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a photoelectric sensor.

[0002]

2. Description of the Related Art Some photoelectric sensors have a microcomputer whose light receiving sensitivity is automatically adjusted. However, if only the automatic adjustment is performed, the adjustment may not be performed to an appropriate value. Therefore, the adjustment can be usually performed by a manual operation.

FIG. 13 shows a photoelectric sensor having automatic sensitivity adjusting means and manual adjusting means. In the drawing, reference numeral 1 denotes a display unit for displaying the level of light receiving sensitivity, which is configured by arranging a plurality of light emitters (light emitting diodes). On the lower side of the display unit 1, a set button S1, an adjustment direction switch S
2. A mode change switch S3 is provided.

In order to automatically adjust the light receiving sensitivity, the mode changeover switch S3 is switched to an automatic sensitivity adjusting mode (upper side in the figure) so that the detection object is placed in the measurement area of the photoelectric sensor and is removed from the measurement area. Sometimes set button S1
When is pressed, the light receiving amount in each case is sampled, and the light receiving sensitivity is set to an intermediate value. When the light receiving sensitivity is automatically adjusted in this manner, the light emitter is turned on according to the adjusted light receiving sensitivity. To manually adjust the light receiving sensitivity, the mode changeover switch S3 is switched to a manual sensitivity adjusting mode (center position in the figure), and if the light receiving sensitivity is further adjusted in a direction to increase the light receiving sensitivity, the switch S2 is decreased to the + side. To adjust in the direction, switch S2
To the minus side, and then press the set button S1.
Thereby, the lighting position of the light emitter on the display unit 1 changes according to the adjustment amount.

Further, the photoelectric sensor of FIG. 13 is provided with setting switches S4 to S6 for various setting items. The setting switch S4 is an output operation setting switch for setting whether to turn on the output when light is received or to turn on the output when no light is received. Setting switch S5
Is a timer setting switch for setting whether or not to delay the cycle of the output signal. The setting switch S6 is a frequency setting switch for variably setting the light emission frequency in order to prevent mutual interference when a plurality of photoelectric sensors are arranged adjacent to each other.

However, in order to perform the sensitivity adjustment in the above configuration, in addition to the operation of switching the mode switch, a switch for switching the adjustment direction and the operation of the set button must be operated. It was difficult to perform the adjustment work smoothly. Furthermore, a plurality of changeover switches and setting switches for setting the sensitivity adjustment and various setting items are provided, and it has been difficult to reduce the size. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to adjust the light receiving sensitivity or perform various settings. To provide a possible photoelectric sensor.

[0006]

In order to achieve the above object, a photoelectric sensor according to claim 1 detects the amount of light received with and without a detected object by a first switching operation, and detects the amount of received light. Automatic sensitivity setting for automatically setting the light sensitivity based on the amount and manual sensitivity setting for changing the light sensitivity while the second switching operation is continuously performed by the second switching operation. In a photoelectric sensor that can be provided, a first switching unit that performs a switching operation by pushing an operation unit, and a second switching unit that performs a switching operation by operating the operation unit in a front-rear direction that intersects the pushing operation direction. And a switching mechanism configured integrally with the first and second switching operations in the automatic sensitivity setting. The switching operation of the switching means is performed, the second switching operation in the manual sensitivity setting is performed by the switching operation of the second switching means, and the light receiving sensitivity in the manual sensitivity setting is changed by the second switching means. It is characterized in that the light receiving sensitivity can be changed up and down according to the operation direction of the operation unit in the switching operation.

A photoelectric sensor according to a second aspect is characterized in that, in the photoelectric sensor according to the first aspect, the variable speed of the light receiving sensitivity varies depending on the operation amount of the operation section in the switching operation of the second switching means. Have.

According to a third aspect of the present invention, there is provided a photoelectric sensor having a plurality of setting items and a display unit for displaying setting contents of each of the setting items, wherein the first switching unit performs a switching operation by pressing an operation unit. Means, and a switch mechanism integrally provided with a second switching means for performing a switching operation by operating the operation unit in a front-rear direction crossing the pressing operation direction, wherein the first switching means or The present invention is characterized in that the setting items are switched by one of the second switching means and the setting contents of the respective setting items are changed by the other switching means.

According to a fourth aspect of the present invention, the photoelectric sensor detects an amount of received light with and without a detected object by the first switching operation, and automatically sets the light receiving sensitivity based on the amount of received light. In a photoelectric sensor capable of performing manual sensitivity setting in which the light receiving sensitivity is varied and sensitivity setting is performed while the second switching operation is continuously performed by the sensitivity setting and the second switching operation, switching is performed by pressing an operation unit. A switch mechanism integrally provided with a first switching means for performing an operation, and a second switching means for performing a switching operation by operating the operation unit in a front-rear direction crossing the pressing operation direction; A plurality of light emitters for displaying the received light sensitivity, and a plurality of setting items and the setting contents of each setting item. And a mode changeover switch for switching between a sensitivity adjustment mode and a setting mode. If the mode changeover switch is in the sensitivity adjustment mode, the first switching operation in the automatic sensitivity setting is the first switching operation. The switching operation of the switching means is performed, and the second switching operation in the manual sensitivity setting is performed by the switching operation of the second switching means, and the light receiving sensitivity in the manual sensitivity setting is changed by the second switching means. The light receiving sensitivity is changed up and down according to the operation direction of the operation unit in the switching operation, and if the mode changeover switch is in the setting mode, the light is switched by one of the first switching means or the second switching means. Switch setting items, other It has a feature where the setting contents of each setting item is changed by the switching means.

[0010]

According to the first aspect of the present invention, in order to automatically adjust the light receiving sensitivity, pressing the operating portion of the switch mechanism corresponds to a first switching operation. Then, the first switching means performs a switching operation, and the light receiving sensitivity is automatically adjusted. In order to manually adjust the light receiving sensitivity, the operation unit may be operated in a direction intersecting the push operation direction as the second switching operation.
Then, the second switching means performs a switching operation, and the light receiving sensitivity changes based on the switching operation. Therefore, the sensitivity adjustment can be performed only by operating the operation unit, so that the adjustment operation is easier than in the related art. Further, since there is no need to provide a plurality of switches, miniaturization can be achieved.

According to the second aspect of the present invention, the variable speed of the light receiving sensitivity can be varied according to the tilt angle of the operation lever. Therefore, even when the light-receiving sensitivity needs to be largely adjusted, the light-receiving sensitivity can be adjusted to an appropriate value instantaneously, and fine adjustment can be easily performed even when the light-receiving sensitivity needs to be slightly corrected. Therefore, there is an effect that the adjustment operation can be further facilitated.

According to the third aspect of the invention, the setting items can be switched by one of the first switching means and the second switching means, and the setting contents can be changed by the other. That is, a plurality of setting items can be set only by operating the operation unit. Therefore, there is no need to provide a plurality of switches as in the related art, so that there is an effect that downsizing and cost reduction can be achieved.

According to the fourth aspect of the invention, when the mode changeover switch is switched to the sensitivity adjustment mode, the light receiving sensitivity can be adjusted only by operating the operation section, as in the first aspect of the invention. When the mode switch is switched to the setting mode, a plurality of setting items can be set only by operating the operation unit. Therefore, even in a configuration in which the light receiving sensitivity is adjusted and a plurality of setting items are set, the number of switches can be significantly reduced as compared with the related art, and downsizing and cost reduction can be achieved.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment> A first embodiment of a photoelectric sensor according to the present invention will be described below with reference to FIGS. As shown in FIG. 1, the photoelectric sensor of the present embodiment includes a main body case 11 formed in a rectangular parallelepiped, and a CPU 21 and an amplification circuit 26, which will be described later, are provided inside the main body case 11. An operation panel 12 and a display panel 13 are provided on an upper surface of the main body case 11. An insertion hole 14 for inserting a light emitting and receiving fiber cable is formed on the front surface of the main body case 11, and an electric wire W is drawn out from the rear surface.

FIG. 2 shows a display panel 13 and an operation panel 12.
Is shown. At the front of the display panel 13 (the upper part in FIG. 2),
An operation indicator lamp 15 and a stability indicator lamp 16 are provided.
The operation indicator 15 is turned on when the received light data for the detected object is higher than a reference level R to be described later.
Reference numeral 6 indicates that the light reception data for the detected object is higher than the reference level R and is within the stable range.

The display panel 13 has ten light-emitting members P0 to P9 arranged in a line in the longitudinal direction, and the light-emitting members display light receiving sensitivity at ten levels. A display unit 17 is configured, and a setting display unit 18 that displays setting contents of each setting item is configured. Specifically, the two light emitters P8 and P2 on the front end side
9 displays the setting contents for the output operation setting items, the three luminous bodies P4 to P6 in the center display the setting contents for the frequency setting items, and the two luminous bodies P0 and P on the rear end side.
1 displays the setting content for the timer setting item.

The output operation setting item is used to set whether the output is turned on when light is received (hereinafter, light-on) or the output is turned on when light is not received (hereinafter, dark-on). The frequency setting item is for setting whether or not to delay the end of the output signal, and the frequency setting item is for setting the frequency for the measurement timing.

The operation panel 12 is provided with a mode switch SW1 and a lever switch SW2 corresponding to the switch mechanism of the present invention. The mode switch SW1 is a switch for switching between a sensitivity adjustment mode (upper side in FIG. 2), a measurement mode (center in FIG. 2), and a setting mode (lower side in FIG. 2). Lever type switch S
W2 is a switch for adjusting light receiving sensitivity, changing setting items, and the like.

The lever-type switch SW2 includes an operation lever 19 as shown in FIG. The operation lever 19 is rotatably supported at substantially the center of the case 20 and can be tilted at a predetermined angle in both front and rear directions (both left and right directions in FIG. 4) (see a two-dot chain line in FIG. 4). . In the case 20, two switching circuits are provided on each of the front and rear sides (T1, T2, T3, T3 in FIG. 3).
4), a two-stage switching operation is performed according to the tilt angle. Specifically, when the tilt angle is small, the switching circuit T2 or the switching circuit T3
Performs a switching operation, and when the tilt angle increases, the switching circuit T1 or the switching circuit T4 further performs a switching operation. This switching circuit corresponds to the second switching means of the present invention.

The operation lever 19 can be pushed as shown in FIG. 5 (FIG. 5 shows a pressed state). In the case 20, a switching circuit TP that performs a switching operation by this pushing operation is provided. The switching circuit corresponding to this pressing operation corresponds to the first switching means of the present invention.

FIG. 3 is a circuit diagram of the photoelectric sensor. In the figure, 21 is a CPU. The CPU 21 has ten light-emitting elements P forming the level display section 17 and the setting display section 18.
0 to P9, the operation indicator 15, the stability indicator 16, the mode switch SW1, and the lever switch SW2 are connected. Further, the light-emitting element 22 is connected to the CPU 21 via a light-emitting circuit 23, and the light-receiving element 24 is connected via a light-receiving circuit 25 and an amplifier circuit 26. Output circuit 2
7 is provided, and an output signal is output when light reception data for the detected object is higher than a reference level R described later.

The operation of this embodiment will be described with reference to the flowchart shown in FIG. When the mode switch SW1 is switched to the setting mode, an output operation setting item is set, and an output operation setting routine described later is executed (steps 1 and 2). Thereafter, each time the operating lever 19 of the lever switch SW2 is pressed, the frequency setting item and the timer setting item are switched in that order, and a frequency setting routine and a timer setting routine, which will be described later, are executed (steps 3 and 4). When the mode changeover switch SW1 is switched to the sensitivity adjustment mode, a sensitivity adjustment routine to be described later is executed to adjust the light receiving sensitivity (steps 5 and 6). When the mode is switched to the measurement mode, the measurement of the object is performed. (Steps 7 and 8).

The output operation setting routine will be described with reference to the flowchart shown in FIG. When the output operation setting routine is executed, two light-emitting bodies P displaying the set contents are displayed.
The light-emitting body P9 is turned on among the light-emitting elements 9 and P8 (step 2).
1). That is, the output operation setting is initially set to the light-on state. Here, if the operation lever 19 of the lever type switch SW2 is pressed, the output operation setting is determined to the content,
The output operation setting routine ends (steps 22 and 2).
3). If it is desired to change the output operation setting to the dark-on state, the output operation setting contents are changed by tilting the operation lever 19 backward (downward in FIG. 2), and the light emitter P8 is turned on (steps 24 and 25). Then, if the operation lever 19 is pressed in this state, the setting content is fixed to the dark-on state, and the output operation setting routine ends (steps 26 and 27).
If it is desired to return the settings to the light-on state, the operation lever 19 may be tilted forward (upward in FIG. 2), and the settings are changed to the light-on state, and the light emitter P9 is turned on (step 28, 21).

The frequency setting routine will be described with reference to the flowchart shown in FIG. When the frequency setting routine is executed, three light-emitting bodies P6 and P3 displaying the set contents are displayed.
The light emitter P6 located at the front end side (upper end side in FIG. 2) of P5 and P4 is turned on (step 31). That is, the frequency is initially set to the minimum value. Here, operation lever 1
By pressing 9, the frequency is determined and the frequency setting routine ends (steps 32 and 33). When the operating lever 19 is tilted backward (downward in FIG. 2), the frequency is switched to the intermediate value, and the central light emitting body P5 of the three light emitting bodies P6, P5, P4 is turned on (steps 34, 35, 36). ). Then, if the operation lever 19 is pressed in this state, the frequency is set to the intermediate value, and the frequency setting routine ends (step 3).
7, 38). If the operating lever 19 is tilted backward again, the frequency is switched to the maximum value, and the three light emitters P6, P
5, the light emitter P4 located on the rear end side (the lower end side in FIG. 2) is turned on (steps 39, 40, 41). Then, similarly, if the operation lever 19 is pushed, the frequency is determined to be the maximum value, and the frequency setting routine ends (step 42,
43). When it is desired to return the frequency to a lower direction, the operation lever 19 may be tilted forward in each state. In addition, the state set to the maximum value (the light emitting body P
When the operation lever 19 is further tilted backward at (4 is lit), the value returns to the minimum value (the illuminant P6 is lit) (steps 44 and 45).

The timer setting routine will be described with reference to the flowchart shown in FIG. When the timer setting routine is executed, two light-emitting elements P1, which display the setting contents,
The light emitter P1 of P0 is turned on (step 51). That is, the timer setting is initially set to the off state. Here, if the operation lever 19 is pushed, the timer setting is determined to be in the OFF state, and the timer setting routine ends (step 52,
53). If the user wants to change the timer setting to the ON state, the control lever 19 is tilted backward (downward in FIG. 2) to turn the timer ON and the light emitting body P0 is turned on (steps 54 and 5).
5). When the operation lever 19 is pushed, the timer setting is determined to be in the ON state, and the timer setting routine ends (steps 56 and 57). To return to the off state, the operation lever 19 may be tilted forward (step 58).

The sensitivity adjustment routine will be described with reference to the flowchart shown in FIG. In the present embodiment, the adjustment of the light receiving sensitivity is performed by changing the reference level R.
First, a reference level R is automatically obtained (automatic sensitivity adjustment).
The sample is passed through the measurement area while the operation lever 19 is pressed. Thereby, the received light data for the sample is taken and stored in the memory (steps 61 and 6).
2). When the pressing operation on the operation lever 19 is stopped, the maximum value DMAX and the minimum value DMIN are extracted from the received light reception data, and the reference level R is obtained by the following formula (steps 63 and 64). (DMAX + DMIN) / 2

In order to adjust the light receiving sensitivity by manual operation, after the mode changeover switch SW1 is switched to the sensitivity adjusting mode, the operation lever 19 is tilted according to the adjustment direction (step 67). That is, when the reference level R is changed in a direction of increasing, the tilt is tilted forward (+ side), and when the reference level R is changed in a direction of decreasing, the tilt is tilted backward (− side). Thereby, when tilted forward, the reference level R
Increases, and when tilted backward, the reference level R decreases (steps 70, 71, 72). Note that this increase / decrease value is set to a sensitivity level S, which will be described later, for one tilting operation.
The amount of increase or decrease, and the level display section 17
Is switched by one stage.

The lever-type switch SW2 performs a two-stage switching operation in accordance with the tilt angle of the operation lever 19 as described above. When the tilt angle is small (when the switching circuit T2 or T3 performs a switching operation), the lever switch SW2 has a fixed time. After the standby, the process proceeds to step 70. If the tilt angle is large (the switching operation of the switching circuit T1 or T4 in addition to the switching operation of the switching circuit T2 or T3), the process immediately proceeds to step 7 without waiting for a predetermined time.
Go to 0 (steps 68 and 69). That is, when the tilt angle of the operation lever 19 is increased, the speed of increase / decrease with respect to the reference level R increases, and when the tilt angle is small, the reference level R increases / decreases slowly. Therefore, the reference level R
Is larger than the proper level, the tilt angle of the operating lever 19 can be increased to increase the tilt angle to instantly approach the proper level, and the tilt angle of the operating lever 19 can be finely adjusted by decreasing the tilt angle. .

Then, the reference level R is replaced with ten sensitivity levels S. For that purpose, the maximum value of the settable reference level R is RMAX, and the sensitivity level S is obtained by the following formula (step 65). However, fractions are rounded down. S = R / RMAX * 10 Then, the luminous body P0 corresponding to the determined sensitivity level S
To P9 are turned on (step 66). For example, when the reference level R is 54, the maximum value RMAX of the settable reference level is RMAX.
Is 100, the sensitivity level S becomes 5, and the luminous body P5 indicating the level 5 is turned on.

Subsequently, it is confirmed whether or not the reference level R is appropriate (step 73). Specifically, it is checked whether the output signal is output by passing the sample through the measurement area. If the output signal is not output, the reference level R is not appropriate, and the level is adjusted again while looking at the level display section 17 again.

In the present embodiment, the following effects are obtained by the above configuration. The reference level R can be automatically adjusted by pushing the operation lever 19 of the lever switch SW2. To adjust the reference level R by manual operation, the operation lever 19 can be tilted in the adjustment direction. Therefore, since the sensitivity adjustment can be performed only by operating the operation lever 19, an effect is obtained that the adjustment work is easier than in the related art. Further, since it is not necessary to provide a plurality of switches, downsizing can be achieved.

Since the adjustment speed for the reference level R can be varied according to the tilt angle of the operation lever 19,
Even when the reference level R needs to be largely adjusted, the reference level R can be instantaneously adjusted to an appropriate value and fine adjustment can be easily performed even when a slight correction is required. Therefore, there is an effect that the adjustment operation can be further facilitated.

Since a plurality of setting items can be set only by operating the operation lever 19, there is no need to provide a plurality of switches as in the prior art, and the size and cost can be reduced.

By providing the mode changeover switch SW1, the lever-type switch SW2 can be used also as a switch for adjusting and setting the impression, and the number of switches can be further reduced.

Since the level display section 17 is also used as the setting display section 18 for displaying the setting contents for each setting item,
The number of parts can be reduced, and downsizing and cost reduction can be achieved.

<Other Embodiments> The present invention is not limited to the above-described embodiments, and can be modified and implemented as follows, for example, and these embodiments also belong to the technical scope of the present invention. . (1) In the above embodiment, the switch mechanism of the present invention was constituted by the lever type switch SW2. However, an encoder-type switch as shown in FIG. 11 may be used. The encoder switch has an encoder circuit (not shown) provided therein, and outputs two types of switching pulses having different phases A and B by rotating the rotating unit 31. A reference level R which is a light receiving sensitivity according to the switching pulse.
Variable. The rotating unit 31 is configured to be able to be pushed as in the first embodiment (see a two-dot chain line in FIG. 11), and performs a switching operation by the pushing operation. Then, by pressing the rotating unit 31, the light receiving sensitivity is automatically adjusted in the same manner as described above. Rotating part 31
, Two types of switching pulses having different phases according to the rotation direction and the rotation amount are output. For example, when the rotating unit 31 is rotated in the forward direction, the phase of the B-phase switching pulse is delayed with respect to the A-phase switching pulse, thereby changing the direction to increase the light receiving sensitivity, and rotating the rotating unit 31 in the backward direction. Then, the phase of the A-phase switching pulse is delayed with respect to the B-phase switching pulse, so that the light-receiving sensitivity is reduced. In addition, since the number of switching pulses increases as the rotation amount when the rotation unit 31 is rotated is increased, the variable amount for varying the light receiving sensitivity is also increased. In this manner, the number of switches can be reduced as in the first embodiment, and a small-sized photoelectric sensor having excellent operability can be realized. Further, since the variable amount of the light receiving sensitivity changes according to the amount of rotation of the rotating unit 31, the variable speed of the light receiving sensitivity can be made different depending on the amount of rotation of the rotating unit 31 as in the first embodiment.

(2) The switch mechanism of the present invention may be a slide switch shown in FIG. In this slide switch, the operation unit 41 is moved in the front-rear direction (
(In the left-right direction), and the switching operation is performed by sliding the operation unit 41. Further, the operation unit 41 is configured to be able to be pushed (see a two-dot chain line in FIG. 12), and performs a switching operation also by the pushing operation.
Also in this slide switch, if the light receiving sensitivity is automatically adjusted by, for example, a pressing operation, and the reference level R can be changed up and down by a sliding operation in the front-back direction,
As in the first embodiment, a small-sized photoelectric sensor having excellent operability can be realized.

(3) In the above embodiment, the setting contents of each setting item are displayed by turning on the light emitter P0 and the like. However, after the mode changeover switch SW1 is switched to the setting mode, the light-emitting body P9 and the like in the setting item being set may be blinked and turned on when the setting content is determined. For example, if the output operation setting item is being set, the light emitting body P9 or P8 is made to blink, and if the setting content is determined, the light emitting body is switched from blinking to lighting. In addition, the present invention can be implemented with various modifications without departing from the scope.

(4) In the above embodiment, in the sensitivity adjustment routine, in the sensitivity automatic adjustment, the sample is passed through the measurement area while the operation lever 19 is pressed, and the received light data for the sample during that time is stored in the memory. When the pressing operation is stopped, the maximum value and the minimum value are extracted from the received light reception data, and the reference level R is set to an intermediate value. However, when the operation lever 19 is pressed twice when the sample is placed in the measurement area and when the sample is placed outside the measurement area, light reception data in each case is taken in, and the reference level R is set to an intermediate value. It may be. That is, the switching operation of the first switching means in the claims is not limited to the one that performs the switching operation during the sampling of the received light data as shown in the embodiment, and the one that performs the intermittent switching operation when the sampling of the received light data is desired. It is included.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an entire photoelectric sensor according to a first embodiment.

FIG. 2 is a plan view showing a display panel and an operation panel in the embodiment.

FIG. 3 is a circuit diagram of the photoelectric sensor according to the embodiment.

FIG. 4 is a side view showing a tilting operation of the lever switch according to the embodiment.

FIG. 5 is a side view showing a pressing operation of a lever-type switch in the embodiment.

FIG. 6 is an overall flowchart in the embodiment.

FIG. 7 is a flowchart illustrating an output operation setting routine according to the first embodiment.

FIG. 8 is a flowchart illustrating a frequency setting routine according to the first embodiment.

FIG. 9 is a flowchart showing a timer setting routine in the embodiment.

FIG. 10 is a flowchart showing a sensitivity adjustment routine in the embodiment.

FIG. 11 is a side view showing an encoder switch according to another embodiment.

FIG. 12 is a side view showing a slide switch according to another embodiment.

FIG. 13 is a plan view showing a conventional display panel and operation panel.

[Explanation of symbols]

 19 ... operation lever (operation part) 31 ... rotating part (operation part) 41 ... operation part SW2 ... lever type switch (switch mechanism) P0 to P9 ... light emitter

Claims (4)

[Claims] 1. An automatic sensitivity setting for detecting a light receiving amount with and without a detected object by a first switching operation, and automatically setting a light receiving sensitivity based on the light receiving amounts. In a photoelectric sensor capable of performing a manual sensitivity setting in which the light receiving sensitivity is varied and a sensitivity setting is performed while the second switching operation is continuously performed by the switching operation, a first switching in which a switching operation is performed by pressing an operation unit. Means, and a switching mechanism integrally provided with a second switching means for performing a switching operation by operating the operation unit in a front-rear direction crossing the push operation direction, the switching mechanism in the automatic sensitivity setting The first switching operation is performed by the switching operation of the first switching means, and The second switching operation in the dynamic sensitivity setting is performed by the switching operation of the second switching means, and the variation of the light receiving sensitivity in the manual sensitivity setting varies according to the operation direction of the operation unit in the switching operation of the second switching means. A light-receiving sensitivity that can be varied up and down. 2. The method according to claim 1, wherein the second
A photoelectric sensor, wherein a variable speed of light receiving sensitivity varies according to an operation amount of an operation unit in a switching operation of a switching unit. 3. A photoelectric sensor having a plurality of setting items and a display unit for displaying setting contents of each of the setting items, wherein: a first switching means for performing a switching operation by pressing an operation unit; Has a switch mechanism integrally provided with a second switching means for performing a switching operation by operating in a forward and backward direction intersecting with the pressing operation direction, wherein the switching mechanism of the first switching means or the second switching means is provided. The photoelectric sensor according to claim 1, wherein the setting item is switched by one of the switching units, and the setting content of each of the setting items is changed by the other switching unit. 4. An automatic sensitivity setting for detecting a light receiving amount with and without a detected object by a first switching operation and automatically setting a light receiving sensitivity based on the light receiving amounts. In a photoelectric sensor capable of performing a manual sensitivity setting in which the light receiving sensitivity is varied and a sensitivity setting is performed while the second switching operation is continuously performed by the switching operation, a first switching in which a switching operation is performed by pressing an operation unit. A switch mechanism integrally provided with a second switching unit for performing a switching operation by operating the operation unit in a front-rear direction crossing the pressing operation direction, and displaying the adjusted light receiving sensitivity. Having a plurality of light emitters for displaying a plurality of setting items and setting contents of each setting item; and a sensitivity. A mode changeover switch for switching between an adjustment mode and a setting mode, wherein if the mode changeover switch is in a sensitivity adjustment mode, the first switching operation in the automatic sensitivity setting is performed by a switching operation of the first switching means. The second switching operation in the manual sensitivity setting is performed by the switching operation of the second switching means, and the change of the light receiving sensitivity in the manual sensitivity setting is performed by operating the operation unit in the switching operation of the second switching means. The light receiving sensitivity is changed up and down according to the direction, and if the mode changeover switch is a setting mode, the setting item is switched by one of the first switching means and the second switching means, and the other is switched. Switching means Therefore photoelectric sensor, characterized in that the setting contents of each setting item is changed.