JPH0444946Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a valve unit for a food plant that integrates a terminal unit and a valve.

[Prior Art] The present applicant has proposed a valve unit for food plants in which a terminal unit and a valve are integrated, as shown in FIG.

In FIG. 7, 1 is a valve, and this valve has a cylinder, a piston slidably housed in the cylinder, and a valve body fixed to the piston for opening and closing a passage. The valve 1 is not limited to a sluice valve, but a butterfly valve may also be used.

2 is a terminal unit, and terminal unit 2 is
It inputs the control signal sent from the central unit, and when it matches its own address, controls the opening and closing of the valve 1 according to the control signal, and also replaces the state of valve 1 with a control signal and sends it to the central unit. do.

The terminal unit 2 and the valve 1 are integrally constructed,
This ensures sufficient installation space and simplifies the system configuration.

Furthermore, as mentioned above, two types of valves are used: sluice valves that open and close by vertical drive, and butterfly valves that open and close by rotary drive, and optical limit switches are installed to detect the opening and closing of these valves. It is being

[Problem to be solved by the invention] However, in such conventional valve units, dedicated optical limit switches are used for each of the sluice valve and the butterfly valve, and two types of optical limit switches must be prepared. As a result, there were problems in that the number of parts increased and assembly was complicated.

The present invention was developed in view of these conventional problems, and aims to reduce the number of parts and provide a valve unit that is easy to assemble by changing the assembly direction of the same optical limit switch. There is.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a valve having a valve body that opens and closes a fluid passage, and a valve that inputs a control signal sent from a central unit and matches its own address. A valve unit for a food plant that is integrally configured with a terminal unit with a transparent cover that controls the opening and closing of the valve according to the control signal when the valve is activated, and a terminal unit with a transparent cover that converts the valve status into a control signal and sends it to the central unit. , a printed circuit board that can change the mounting direction of the optical limit switch that detects the opening and closing of the valve.

[Function] In the present invention, two mounting holes are separately formed on the printed circuit board, and the optical limit switch is mounted horizontally or vertically on the printed circuit board so that it can be applied to both sluice valves and butterfly valves. Assemble to.

Therefore, there is no need to prepare two types of optical limit switches, the number of parts can be reduced, and assembly can be simplified.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

1 to 6 are diagrams showing an embodiment of the present invention.

In FIG. 2, 11 is a terminal unit, and 12 is an air valve, and the terminal unit 11 and the air valve 12 are constructed to be integrated.

The air valve 12 includes a cylinder, a piston slidably housed in the cylinder, and a valve body fixed to the piston to open and close a passage, and is used in a food plant. Note that the valve is not limited to a sluice valve, and a butterfly valve may also be used.

The terminal unit 11 receives an optical signal obtained through an optical fiber line and converts it into received light data, and in synchronization with the detection of the end of reception of the received data, serially converts the received light data into an optical signal and sends it to the subsequent stage. a data transmitting/receiving means for outputting data to an optical fiber line of the fluid control valve; an address determining means for outputting a control signal corresponding to a control command bit of the received light data to the fluid control valve when determining its own address from the received light data; and data changing means for changing the control command bit of the light reception data to information on the terminal operating state by the fluid control valve and transmitting it by the transmitting and receiving means when the determining means determines its own address. It is constructed as shown in FIG. 3 of Publication No. 62-185431.

Further, as shown in FIG. 1, a printed circuit board 13 is housed inside the terminal unit 11, and the printed circuit board 13 includes power terminals 14, 15, a power lamp 16, a bulb operating lamp 17, a receiving optical connector 18, A manual switch 19, a limit operation switching pin 20, a limit switch operation lamp 21, a transmission optical connector 22, a setting changeover switch 23, an optical limit switch 27, and the like are provided. Also,
A solenoid valve 25 is provided on the support plate 24. In addition, 26 is a waterproof cable clamp, 3
9 is a transparent cover, and 40 is a case.

Here, the optical limit switch 27 is attached laterally to the printed circuit board 13.

That is, the optical limit switch 27 is fixed laterally with screws 29 by inserting the support portion 28 into a mounting hole 28A formed in the printed circuit board 13. The optical limit switch 27 includes a light emitting section 30 made of a light emitting diode and a light receiving section 31 made of a phototransistor.
A detection space 32 is formed between the light projecting section 30 and the light receiving section 31 (see FIG. 3).

Note that 33 and 34 are the light projecting section 30 and the light receiving section 3.
It consists of two lead wires each drawn out from 1.

In this way, when the optical limit switch 27 is mounted laterally on the printed circuit board 13, it can be applied to a sluice valve as shown in FIG.
By moving in and out of the valve 2, opening and closing of the valve 12 is detected.

Next, as shown in FIG.
By forming another mounting hole 36 in the mounting hole 36, inserting the support portion 28 into this mounting hole 36, and fixing it with screws 29, the optical limit switch 27 can be mounted on the printed circuit board 13 in the vertical direction.

In this case, it can be applied to a butterfly valve, and as shown in FIG.
8 rotates within the detection space 32, opening and closing of the valve can be detected.

In this way, since the same optical limit switch 27 is attached to the printed circuit board 13 in a different assembly direction, it can be applied to both sluice valves and butterfly valves.

As a result, there is no need to prepare two types of optical limit switches, the number of parts can be reduced, and assembly can be simplified.

[Effects of the invention] As explained above, according to the invention, the same optical limit switch can be attached to a printed circuit board by changing the assembly direction.
There is no need to prepare two types of optical limit switches, the number of parts can be reduced, and assembly can be simplified.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, Fig. 2 shows the internal structure of the terminal unit, Fig. 3 shows the optical limit switch installed laterally, and Fig. 4 shows the optical limit switch. FIG. 5 is a diagram showing an optical limit switch installed vertically, FIG. 6 is a diagram showing an example applied to a butterfly valve, and FIG. 7 is a diagram showing a conventional example. In the figure, 11...terminal unit, 12...air valve (valve), 13...printed circuit board, 14,
15...Power terminal, 16...Power lamp, 17
... Valve operation lamp, 18 ... Optical connector for reception, 19 ... Manual switch, 20 ... Limit operation switching pin, 21 ... Limit switch operation lamp, 22 ... Optical connector for transmission, 23 ... Switch for switching settings , 24... support plate, 25...
Solenoid valve, 26...Waterproof cable clamp, 27
...Optical limit switch, 28A...Mounting hole, 2
8... Support part, 29... Screw, 30... Light projecting part,
31... Light receiving section, 32... Detection space, 33, 34
... Lead wire, 35 ... Mounting hole, 36 ... Sensor rod, 37 ... Slit hole, 38 ... Disc, 3
9...transparent cover, 40...case.

Claims (1)

[Claims for Utility Model Registration] A valve having a valve body that opens and closes a fluid passage;
A terminal unit that inputs a control signal sent from the central unit, controls the opening and closing of the valve according to the control signal when it matches its own address, and also replaces the valve status with a control signal and sends it to the central unit. What is claimed is: 1. A valve unit for a food plant integrally comprising: a printed circuit board capable of changing the mounting direction of an optical limit switch for detecting opening/closing of the valve;