JPH0734583U - Detection switch connection terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] The detection signal output from the detection switch can be reliably input, and the connection with any connected detection switch can be easily released. Reduce man-hours. [Structure] An engaging claw 4 of a photoelectric switch 18 is attached to a mounted engaging portion 17 formed on a base portion 10 of a main terminal 5.
3 are engaged. A connecting portion 11 is integrally provided on the base portion 10, and a signal output connector 36 provided on the photoelectric switch 18 is connected to a signal input connector 27 provided on the connecting portion 11. When the connectors 27 and 36 are connected to each other, the connection engaging portion 24 provided on the connecting portion 11 is engaged with the connection engaging portion 42 provided on the photoelectric switch 18. Further, by pressing the pressing protrusion 24b, the engagement of the connected engaging portion 24 with the connecting engaging portion 42 can be released and the photoelectric switch 18 can be detached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a detection switch connecting terminal in which a plurality of detection switches are arranged in parallel with each other.

[0002]

[Prior art]

 Conventionally, when the load is controlled by the sequence controller based on the detection status of various detection switches such as photoelectric switch, proximity switch, pressure switch, etc., the cables from those detection switches should be directly connected to the sequence controller. There is. However, in such a configuration, it is necessary to wire a cable from the mounting position of the detection switch to the sequence controller for each detection switch, and the wiring work is very troublesome.

In view of this, in Japanese Utility Model Publication No. 1-127001, a screw-type transmission terminal and a sequence controller are connected by a serial transmission line, and a cable from a detection switch is screwed to the screw-type transmission terminal. I am trying. Therefore, it suffices to connect the transmission terminal and the sequence controller with a serial transmission line, and the wiring work can be reduced.

However, with the above configuration, although the cable wiring work between the transmission terminal and the sequence controller can be simplified, it is necessary to screw the cable from the detection switch to the terminal of the transmission terminal. However, there is still a drawback that the connection work is troublesome.

In order to deal with this, Japanese Utility Model Laid-Open No. 1-126078 discloses a socket in which a plug is provided at the tip of a cable from a detection switch, and a connection pin protruding from the plug is provided in a serial transmission line. I am trying to connect to the receptacle. By using such a configuration, the cable from the detection switch can be easily connected to the transmission terminal.

[0006]

[Problems to be solved by the device]

 However, in Japanese Utility Model Laid-Open No. 1-126708 disclosed in the above-mentioned conventional example, since the plug is supported in the socket only by inserting the connecting pin into the receptacle, for example, the direction opposite to the direction in which the plug is inserted into the receptacle. Not only when a force is applied to the plug, but there is a risk that the plug may fall out of the socket due to vibration, which makes the signal transmission uncertain. In this case, it is possible to increase the attachment force of the plug to the socket by connecting the plugs connected to the socket to each other, but then it becomes impossible to remove the arbitrary plug from the socket.

Further, since the plug connected to the cable from the detection switch is mounted in the socket, it is necessary to mount the plug in the socket and then mount the detection switch. However, it has the drawback of requiring a lot of man-hours for mounting the detection switch.

The present invention has been made in view of the above circumstances, and an object thereof is to be able to reliably input a detection signal output from a detection switch and to connect with any connected detection switch. It is an object of the present invention to provide a terminal for connecting a detection switch that can be easily released and that can reduce the man-hours for mounting the detection switch.

[0009]

[Means for Solving the Problems]

 The detection switch connecting terminal of the present invention has a signal output connector and a connecting engaging portion set to a width dimension of the main body or less on the end surface of the main body, and a DIN rail mounting engaging claw on the bottom surface of the main body. A base part is provided so that a plurality of the detection switches configured to have a close contact can be arranged in parallel, and a connection part having a signal input connector connected to the signal output connector of the detection switch is integrated with the base. The connector for signal output of the detection switch is connected to the connector for signal input and engages with the engaging portion for connection of the detection switch, and the engagement state is changed according to an operation from the outside. An engaged portion for connection to be released is provided on the connection portion, and an engaged portion for attachment which engages with the DIN rail mounting engagement claw of the detection switch in the state where the connectors are connected to each other is provided. An output section is provided on the base section, which inputs the detection signal output from the signal output connector of the detection switch through the signal input connector and outputs a signal indicating the detection switch that outputs the detection signal. It is provided.

Further, the detection switch is configured to output in addition to the detection signal including a value-added signal used according to a user's request, and the detection switch is provided to the base portion in a switching operation state. An operating switch having an operator protruding from the mounting path of the specific detection switch of the specific detection switch to prevent mounting of the specific detection switch. When a value-added signal is output from the detection switch connected to the input connector, the specific detection switch may output a signal indicating that the detection signal has been output.

[0011]

[Action]

 In the case of the detection switch connecting terminal according to the first aspect, in order to mount the detection switch on the base portion, the signal output connector of the detection switch is connected to the signal input connector. Then, the connecting engagement portion provided in the main body of the detection switch engages with the connected engagement portion provided in the connection portion, so that the connectors can be reliably connected to each other. Further, since the DIN rail mounting engagement claw provided on the bottom surface of the detection switch engages with the mounted engagement portion provided on the base portion, the detection switch can be securely mounted on the base portion. it can. Then, when the detection signal is output from the detection switch, the output unit outputs a signal indicating the detection switch that has output the detection signal, so that the detection switch that is in the detection state can be determined based on the signal. it can.

On the other hand, in order to remove the detection switch from the base portion, the connected engaging portion provided in the connecting portion is operated. Accordingly, the engagement of the detection switch with the connection engagement portion of the connection target engagement portion is released, so that the signal output connector of the detection switch can be detached from the signal input connector of the base portion.

In the case of the detection switch connecting terminal according to the second aspect, when the user wants to use the value-added signal output from the detection switch, the user switches the operation switch. Then, the operator of the operation switch protrudes into the mounting path of the specific detection switch to prevent the detection switch from being mounted, so that the mounting of the specific detection switch can be prohibited without using a special mechanism.

At this time, the output unit outputs a signal indicating that the specific detection switch has output the detection signal when the value-added signal is output from the detection switch connected to the signal input connector. Based on this, it can be determined that the value-added signal has been output from the detection switch.

[0015]

【Example】

 Hereinafter, a first embodiment in which the present invention is applied to a terminal for serial transmission will be described with reference to FIGS. 1 to 16. FIG. 2 schematically shows the entire configuration including the serial transmission terminal. In FIG. 2, the input unit 2 is attached to the input terminal of the sequence controller 1, and the control unit 3 is connected to the input unit 2 through the serial transmission line 4 and the control line. Further, the control unit 3 is connected to one main terminal 5 or a plurality of main terminals 5 as necessary through the serial transmission line 4, and the serial transmission line is connected between the input unit 2 and each main terminal 5. Serial transmission is performed through 4. In this case, the control unit 3 outputs the serial signal generated based on the command from the input unit to the control unit 3 and each main terminal 5 through the serial transmission line 4. The input unit 2 also converts a serial signal input through the serial transmission line 4 into a parallel signal and outputs the parallel signal to the sequence controller 1.

An extension terminal 6 is connected to the main terminal 5 as needed. The main terminal 5 and the extension terminal 6 are configured so that a predetermined number of detection switches, which will be described later, can be mounted. When the mounted detection switches are in the detection state, the detection switch that outputs the detection signal is The signal shown is output to the control unit 3 through the serial transmission line 4. Then, the sequence controller 1 outputs a signal to the output unit 7 based on the parallel signal (a signal indicating the detection state of each detection switch) input from the input unit 2. The output unit 7 is adapted to appropriately drive each type of load 8 in response to a command from the sequence controller 1.

FIG. 1 shows a predetermined portion of the main terminal 5 in cross section, FIG. 3 shows the main terminal 5 in a plane, and FIG. 4 shows the main terminal 5 in perspective. In FIGS. 1, 3 and 4, the main terminal 5 is formed by integrating a plurality of predetermined shaped members by engagement (see FIG. 1), and is composed of a panel portion 9, a base portion 10 and a connecting portion 11. ing. The panel section 9 is provided with an error address display section 12, a power indicator 13, a transmission indicator 14, an address setting switch 15 and a system set button 16.

On the upper surface of the base portion 10, a mounting engagement portion 17 corresponding to the shape of the DIN rail is formed. In this embodiment, four photoelectric switches 18 (see FIG. 1), which are detection switches, are attached to the base portion 10, and the attached engaging portions 17 are attached to the attached engaging portions 17 according to the attachment positions. Is formed with four protrusions 19. Further, as shown in FIG. 1, an engaging claw 20 for mounting a DIN rail is integrally formed on the lower surface of the base portion 10, and an engaging claw 21 facing the engaging claw 20 is elastically inward. It is installed in a biased state. The cable 22 is led out from the end surface of the base portion 10. The base portion 10 is provided with two mounting holes 10a.

In FIG. 1, the cover 23 that closes the back surface of the connection portion 11 is integrally formed with a connected engagement portion 24 that projects forward, and the tip of the connected engagement portion 24. The engaging claw 24a is formed so as to face upward in the drawing. A pressing protrusion 24b is formed on the upper surface of the connected engaging portion 24, and the pressing protrusion 24b protrudes upward from a hole 11a formed on the upper surface of the connecting portion 11. With the above configuration, the connecting engagement portion 24 is bent downward by the downward pressing operation of the pressing protrusion 24b, and the engaging claw 24 is elastically moved downward accordingly. .

An alarm output switch 25, which is an operation switch, is provided at an end of the base portion 10, and an operator 25a thereof projects upward from the upper surface of the base portion 10 so as to be switchable. The operator 25a of the alarm output switch 25 is adapted to move to a position where it is removed from the mounted engagement portion 17 and a position where it is projected to the mounted engagement portion 17 depending on the switching position.

On the other hand, a printed wiring board 26 is arranged in the connection portion 11, and four signal input connectors 27 are mounted on the printed wiring board 26. These signal input connectors 27 face the front from a window 11b formed on the front surface of the connecting portion 11. In this case, the connected engaging portion 24 is located above the signal input connector 27. The printed wiring board 26 is provided separately for each signal input connector 27.

A printed wiring board 28 on which a control circuit is mounted is arranged in the main terminal 5, and the printed wiring board 28 and each of the printed wiring boards 26 are connected by a flexible board (not shown). There is.

FIG. 5 shows an electrical configuration of the main terminal 5 including a control circuit mounted on the printed wiring board 28. That is, the power supply line 29 introduced into the main terminal 5 through the cable 22 is connected to each signal input connector 27 and the extension connector 30. In this case, the signal input connector 27 has four terminals, and a predetermined pair of terminals among these terminals are set as power supply terminals (+ V, 0) and connected to the power supply line 29. At the same time, the predetermined terminal is set as the detection signal input terminal (IN) and the predetermined terminal is set as the alarm signal input terminal (STB). Here, the detection signal input terminal (IN) and the alarm signal input terminal (STB) of each signal input connector 27 are selectively connected to the input circuit 31 according to the switching state of the alarm output switch 25. The input circuit 31 has an input side and an output side connected by a photocoupler.

The extension connector 30 has 16 terminals, and a predetermined pair of terminals among these terminals are set as power supply terminals (+ V, 0) and connected to the power supply line 29. At the same time, the predetermined terminals are connected to the alarm output switch 25, and the remaining terminals are connected to the input circuit 31.

On the other hand, one end of the serial transmission line 4 introduced into the main terminal 5 through the cable 22 is connected to the control unit 3 and the other end is connected to the power supply circuit 32. The power supply circuit 32 supplies power to the transmission control circuit 33, which is an output section, and other circuits while stabilizing the DC voltage input from the serial transmission line 4 to a predetermined constant voltage. The input circuit 34 monitors the voltage of the serial transmission line 4 and notifies the transmission control circuit 33 that the voltage rises from 12V to 24V. The output circuit 35 outputs 0V to the serial transmission line 4 in response to a command from the transmission control circuit 33.

The power supply indicator lamp 13 lights up when the power supply circuit 32 supplies power. The transmission indicator 14 lights up based on a command from the transmission control circuit 33. The error address display section 12 displays the start address of the main terminal 5 in which a transmission error has occurred, based on a command from the transmission control circuit 33. The address setting switch 15 is used when setting a start address in the main terminal 5, and outputs the set start address to the transmission control circuit 33. The system set button 16 is operated when the start address set in the address setting switch 15 is set in the transmission control circuit 33, and outputs a low level signal indicating the operation to the transmission control circuit 33. The system set button 16 is provided only on a specific main terminal 5 that controls the system.

FIG. 6 schematically shows the electrical configuration of the photoelectric switch 18 mounted on the main terminal 5. In FIG. 6, the photoelectric switch 18 has a signal output connector 36, and in the state where the signal output connector 36 is connected to the signal input connector 27 of the main terminal 5, the power supply terminal of the sensor main circuit 37. Power is supplied to (+ V, 0). Further, the sensor main circuit 37 outputs a detection signal from the output terminal (OUT) in a predetermined detection state, and when the detection state becomes unstable, outputs an alarm signal from the alarm terminal (STB) to a signal output connector. Output to 36.

Further, as shown in FIG. 7, the extension connector 38 of the extension terminal 6 is connected to the extension connector 30 of the main terminal. Here, the extension terminal 6 is supplied with power from the main terminal 5 while the connectors 30 and 38 are connected, and outputs the detection signal and the alarm signal from the photoelectric switch 18 attached to the extension terminal 6 to the main terminal 5. It has become. In this case, as shown in FIG. 8, a maximum of three extension terminals 6 can be connected to the main terminal 5.

The transmission control circuit 33 of the main terminal 5 has the following functions.

When the system set button 16 is operated, the start address set by the address setting switch 15 is set.

When the detection signal is input from the input circuit 31, the address of the photoelectric switch that has output the detection signal is determined based on the start address.

The present address is determined based on the serial signal input through the input circuit 34, and when the address matches the address of the detection switch determined by the address, the output circuit 35 is driven.

The serial transmission line 4 is monitored based on the serial signal input through the input circuit 34. When an abnormality occurs in the serial transmission line 4, the start address of the main terminal 5 in which the abnormality has occurred is displayed in the error address display section. Display on 12.

Next, the serial transmission between the control unit 3 and the main terminal 5 will be briefly described. As shown in FIG. 9A, the control unit 3 serially repeats a signal for one frame consisting of n pulse signals of a predetermined cycle falling from 24V to 12V and a check signal indicating the inspection result of the abnormality occurrence. Output to the main terminal 5 through the transmission line 4.

On the other hand, the transmission control circuit 33 of the main terminal 5 monitors the input state of the detection signal from the photoelectric switch 18 attached to itself and the photoelectric switch 18 attached to the extension terminal 6, and When the detection signal is input from the switch 18, the address corresponding to the photoelectric switch 18 is determined based on the start address set by the address setting switch 15. That is, when the address setting switch 15 is set to “00”, the address of the first photoelectric switch 18 of the four photoelectric switches mounted on the main terminal 5 is set to “00”, The addresses of the second, third and fourth photoelectric switches 18 are set to "01", "02" and "03", respectively. Further, when the extension terminal 6 is connected to the main terminal 5, the nth photoelectric device (nth from the first photoelectric switch 18 attached to the main terminal 5) installed in the expansion terminal 6 is connected. The address of the switch 18 is set to "n-1". It is not necessary to sequentially install the photovoltaic switch 18 on the main terminal 5 and the extension terminal 6.

Then, the transmission control circuit 33 of the main terminal 5 counts the address of the pulse signal currently being input based on the input state from the input circuit 34, and outputs the address and detection signal of the photoelectric signal. When the address of the switch 18 matches, the output circuit 35 is driven. As a result, since the output circuit 35 outputs 0V to the serial transmission line 4, the pulse signal that is the address of the photoelectric switch 18 that outputs the detection signal in the pulse signal output from the control unit 3 drops from 12V to 0V. Come to do. In the example of FIG. 9B, the fourth photoelectric switch 18 (corresponding to address 3) and the sixth photoelectric switch 18 (corresponding to address 5), that is, the fourth photoelectric switch 18 attached to the main terminal 5 And that the second photoelectric switch 18 mounted on the extension terminal 6 directly connected to the main terminal 5 is in the detection state.

The input unit 2 inputs the pulse signal output from the control unit 3 through the serial transmission line 4, and when the pulse signal drops from 12V to 0V, it corresponds to the address of the pulse signal. Then, the photoelectric switch 18 determines that the detection signal has been output, and outputs a parallel signal indicating this to the sequence controller 1. Therefore, the sequence controller 1 can appropriately drive the load 8 based on the detection states of the photoelectric switches 18 mounted on the main terminal 5 and the extension terminal 6.

On the other hand, FIGS. 10 to 13 show the side surface, the rear surface, the plane surface and the lower surface of the photoelectric switch 18 mounted on the main terminal 5 and the extension terminal 6, respectively. 10 to 13, in the photoelectric switch 18, the light projecting optical fiber 40 and the light receiving optical fiber 41 are mounted on the front side of the main body 39. The object to be detected is detected by projecting light to a predetermined detection region through the light receiving optical fiber 41 and receiving light reflected by the object to be detected located in the detection region. Here, a signal output connector 36 is provided on the back surface of the main body 39, and power is supplied to the sensor main circuit 37 through the signal output connector 36, and the detection signal and detection state from the sensor main circuit 37 are not detected. It outputs an alarm signal indicating that it has become stable.

In this case, the signal output connector 36 is formed integrally with the connecting engagement portion 42 surrounding it, and the horizontal width dimension of the connecting engagement portion 42 is within the horizontal width dimension of the main body 39. And an engaging hole 42a is formed in the upper and lower surfaces thereof.

Further, a DIN rail mounting engagement claw 43 is integrally formed on the lower surface of the main body 39 of the photoelectric switch 18, and an engagement claw 44 facing the engagement claw 43 is inward. It is installed in a biased state. Here, a groove 45 is formed along the center of the main body 39 at a predetermined portion of the lower surface of the photoelectric switch 18 facing the engaging claw 43.

Next, a method of mounting the photoelectric switch 18 having the above-described configuration on the main terminal 5 will be described. First, as shown in FIG. 14, the photoelectric switch 18 is moved to the left side in the drawing with the engaging claw 44 of the photoelectric switch 18 being in contact with the base portion 10. Then, as shown in FIG. 15, the signal output connector 36 of the photoelectric switch 18 is inserted into the signal input connector 27 of the main terminal 5 in a aligned state. At this time, when the mounting position of the photoelectric switch 18 with respect to the base portion 10 is accurate, the protrusion 19 provided on the mounting engagement portion 17 of the base portion 10 is a groove formed on the lower surface of the photoelectric switch 18. Since the engaging claw 43 of the photoelectric switch 18 and the mounting engaging portion 17 of the base portion 10 are allowed to enter into 45, the signal output connector 36 of the photoelectric switch 18 is provided in the connecting portion 11. It can be inserted into the signal input connector 27 without tilting.

When the mounting of the photoelectric switch 18 on the main terminal 5 is completed, the engaging claws 24 a provided on the connected engaging portion 24 of the main terminal 5 are connected to the photoelectric switch 18 as shown in FIG. The engaging hole 42a of the connecting engaging portion 42 is elastically engaged from the lower side thereof, and the engaging claw 43 of the photoelectric switch 18 is engaged with the mounted engaging portion 17 of the main terminal 5. Like

With the above-described mounting, the photoelectric switch 18 can be accurately mounted to the main terminal 5, and the photoelectric switch 18 is connected to the signal input connector 27 by connecting the signal output connector 36 and the signal input connector 27. It can be connected to the electric circuit of terminal 5. At this time, when the connectors 36 and 27 are connected, the connecting engagement portion 42 integrated with the signal output connector 36 is engaged with the connected engagement portion 24 of the connection portion 11, so that each connector It is possible to surely connect 36 and 27 to each other.

Further, in order to remove an arbitrary photoelectric switch 18 from the photoelectric switches 18 mounted on the main terminal 5 as described above, a pressing protrusion provided on the connecting portion 11 corresponding to the photoelectric switch 18 is removed. The portion 24b is pressed. Then, the engaging claws 24a of the connected engaging portion 24 move downward to release the engagement of the photoelectric switch 18 with the connecting engaging portion 42, so that the photoelectric switch 18 is opposed to the mounting direction in the pressed state. By moving in the opposite direction, any photoelectric switch 18 can be easily removed from the main terminal 5.

The above-described attachment / detachment work of the photoelectric switch 18 can be performed in exactly the same manner in the extension terminal 6.

By the way, although the photoelectric switch 18 is configured to output an alarm signal indicating that the detection state has become unstable, the main terminal 5 outputs the alarm signal from the photoelectric switch 18 in a normal state. I'm not supposed to do it. This is because such an alarm signal may be used according to the user's need, and therefore, in general, the alarm signal output from the photoelectric switch 18 is not used in a normal use state. .

When the user wants to use the alarm signal output from the photoelectric switch 18, the operator 25a of the alarm output switch 25 is switched. In such a switching operation state of the alarm output switch 25, the operator 25a of the alarm output switch 25 is adjacent to the projection 19 corresponding to the first photoelectric switch 18 which is a specific detection switch in the mounting engagement portion 17. Since the first photoelectric switch 18 is mounted on the main terminal 5, the mounting thereof is blocked by the operator 25a of the alarm output switch 25. As a result, the first photoelectric switch 18 cannot be attached to the main terminal 5, but in the state where the alarm output switch 25 is switched, the input circuit 31 does not input the detection signal from the first photoelectric switch 18. The alarm output output from the photoelectric switch 18 mounted on the main terminal 5 and the extension terminal 6 is input. Therefore, when an alarm signal is output from any one of the photoelectric switches 18, the transmission control circuit 33 sets the serial transmission line to 0V at the timing when the pulse signal of the address corresponding to the first photoelectric switch 18 is input. Since it is turned down, the sequencer controller 1 is set to judge that the alarm signal is output when the first photoelectric switch 18 is in the detection state, thereby effectively using the alarm signal. It is possible to quickly respond to the unstable detection state of the photoelectric switch 18.

When the photoelectric switch 18 is used as a cable connection type, it can be dealt with by connecting the connector connected to the cable to the signal output connector 36. Can be expanded to increase versatility.

According to the above configuration, the connected engagement portion 24 is provided corresponding to the signal input connector 27 provided on the connection portion 11, and the photoelectric switch 18 is provided by the connected engagement portion 24. Since the connection engaging portion 42 integrally provided with the signal output connector 36 is engaged, a large force is applied in the opposite direction to the mounting direction as compared with the configuration in which the connectors are connected alone. Even in such a case, it is possible to prevent the connection state of the photoelectric switch 18 to the main terminal 5 from being released or becoming unstable.

Further, the connecting engagement portion 42 surrounding the signal output connector 36 of the photoelectric switch 18 is formed within the lateral width dimension of the photoelectric switch 18, and the connecting engagement portion 24 engages for connection. Since the engagement with the portion 42 can be released for each photoelectric switch 18, any photoelectric switch 18 can be easily removed from the main terminal 5 while the photoelectric switch 18 is closely attached to the main terminal 5.

Further, since the photoelectric switch 18 can be connected to the electric circuit of the main terminal 5 only by mounting the photoelectric switch 18 on the main terminal 5, the configuration is such that the cable from the photoelectric switch 18 is connected. Compared to the ones, it is not necessary to perform the work of attaching the photoelectric switch 18 in addition to the work of connecting the cables, so that the number of work steps can be reduced.

Further, the photoelectric switch 18 is mounted on the main terminal 5 by using the DIN rail mounting engagement claws 43 provided on the photoelectric switch 18, so that the mounting structure of the photoelectric switch 18 is changed. Can be implemented without

In addition, when the alarm output switch 25 is switched to use the alarm signal output from one of the photoelectric switches 18 mounted on the main terminal 5 and the extension terminal 6, the switching operation is performed according to the switching operation. Since the first photoelectric switch 18 cannot be attached to the main terminal 5, it is possible to reliably prevent the first photoelectric switch 18 from being mistakenly attached to the main terminal 5. Moreover, since the operator 25a of the alarm output switch 25 is used as such a mounting prevention structure, it is not necessary to prevent the mounting of the first photoelectric switch 18 by using a special mechanism, It can be implemented at low cost.

FIG. 17 shows a plan view of a main terminal in the second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. That is, the main terminal 5 has a connector 46, which is an output section, in place of the panel section 9, and the detection signals from the photoelectric switches 18 mounted on the main terminal 5 and the extension terminal 6 are transmitted in parallel through the connector 46. Output to the controller 1. In this case, the connection structure and the mounting structure for the photoelectric switch 18 are the same.

Also in the second embodiment, the photoelectric switch 18 can be surely connected and attached to the main terminal 5 and the additional terminal 6, and any photoelectric switch 18 can be easily removed.

In each of the above embodiments, the pressing protrusion 24b provided on the main terminal 5 is configured to simply release the engagement with the photoelectric switch 18 by the pressing operation. The photoelectric switch 18 disengaged in response to an operation may be configured to be pushed forward.

Further, up to four photoelectric switches can be mounted on the main terminal 5 and the extension terminal 6, and up to three extension terminals 6 can be connected to the main terminal 5, but the number of them can be changed appropriately. Of course you can.

Further, in place of the photoelectric switch 18 mounted on the main terminal 5 and the extension terminal 6, various detection switches such as a proximity switch and a pressure switch having the same connection structure and mounting structure as the photoelectric switch 18 are mounted. May be.

[0059]

[Effect of device]

 As is apparent from the above description, the detection switch connecting terminal of the present invention has the following effects.

According to the first aspect of the present invention, the base section for mounting the photoelectric switch is provided with the connecting section, and the signal input connector provided in the connecting section is provided with the signal output connector provided in the photoelectric switch. As soon as the connection is established, the connected engagement part that engages / disengages the connection engagement part provided on the photoelectric switch in the connected state is provided, so the detection signal output from the detection switch can be secured. The input according to claim 2, wherein the connection with any connected detection switch can be easily released, and the number of man-hours for mounting the detection switch can be reduced. For example, when the operation switch for using the value-added signal output from the detection switch is switched, it can be used to output the value-added signal by the operator of the operation switch. Since the installation of the specific detection switch that is prohibited is prevented, the installation of the specific detection switch can be prohibited without using a special mechanism.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a main terminal according to a first embodiment of the present invention with a photoelectric switch removed.

FIG. 2 is a block diagram showing the overall configuration.

[Figure 3] Plan view of the main terminal

FIG. 4 is a perspective view of the main terminal.

FIG. 5 is a schematic diagram showing an electrical configuration of a main terminal.

FIG. 6 is a schematic diagram showing an electrical configuration of a photoelectric switch.

FIG. 7 is a perspective view of the main terminal and the extension terminal shown in a separated state.

FIG. 8 is a plan view of the main terminal and extension terminal shown in a connected state.

FIG. 9 is a diagram showing a transmission method of a detection signal by a serial signal.

FIG. 10 is a side view of the photoelectric switch.

FIG. 11 is a rear view of the photoelectric switch.

FIG. 12 is a plan view of a photoelectric switch.

FIG. 13 is a bottom view of the photoelectric switch.

FIG. 14 is a vertical cross-sectional view of the main terminal showing the start of the mounting process of the photoelectric switch.

FIG. 15 is a view showing a process of mounting the photoelectric switch.
Corresponding figure

FIG. 16 is a view showing the end of the process of mounting the photoelectric switch.
Corresponding figure

FIG. 17 is a view corresponding to FIG. 3 showing a second embodiment of the present invention.

[Explanation of symbols]

Reference numeral 10 is a base portion, 11 is a connecting portion, 18 is a photoelectric switch (detection switch), 24 is a connected engaging portion, 24a is an engaging claw, 24b is a pressing protrusion, 25 is an alarm output switch (operation switch), 25a. Is an operator, 27 is a signal input connector, 33 is a transmission control circuit (output unit), 36 is a signal output connector, 39 is a main body, 42 is a connecting engaging portion, 42a is an engaging hole, and 43 is an engaging member. It is a nail.

Claims (2)

[Scope of utility model registration request] 1. An end surface of the main body has a signal output connector and a connecting engagement portion set to a width dimension of the main body or less, and a DIN rail mounting engagement claw on the bottom surface of the main body. A plurality of detection switches, which are arranged in parallel with each other in a state where they are closely attached to each other, and a connection portion which is integrally formed with the base portion and has a signal input connector which is connected to the signal output connector of the detection switch. When the signal input connector of the detection switch is connected to the signal input connector provided at the connection portion, the signal input connector is engaged with the connection engaging portion of the detection switch and its engagement is performed in response to an external operation. An engaged portion for connection that releases the mated state, and an engaged portion for engagement that engages with the DIN rail mounting engagement claw of the detection switch in the connected state of the connectors provided on the base portion. And an output unit for inputting the detection signal output from the signal output connector of the detection switch through the signal input connector and for outputting a signal indicating the detection switch that has output the detection signal. A terminal for connecting a detection switch. 2. The detection switch is configured to output in addition to a detection signal, a value-added signal used in response to a user's request, and output to the base unit in the switching operation state. An operation switch is provided that has an operation member that protrudes into a mounting path of the specific detection switch of the switches with respect to the mounting path with respect to the specific detection switch, and the output unit is in a switching operation state of the operation switch. When a value-added signal is output from the detection switch connected to the signal input connector, the specific detection switch is configured to output a signal indicating that the detection signal has been output. Terminal for detecting switch connection.