JPH03625Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pilot type solenoid valve with a printed wiring board.

[Conventional technology]

Conventionally, power is supplied to the pilot valve of a pilot type solenoid valve by connecting a power supply connection terminal on the pilot valve and a connector terminal for connecting to an external power supply, as shown in Japanese Patent Laid-Open No. 56-160477, for example. This was done by connecting them with lead wires. Therefore, it is necessary to connect the lead wires during manufacturing, which increases work costs due to poor workability, and is prone to incorrect wiring and poor welding.
It was not possible to improve the reliability of the equipment.

Additionally, when adding an indicator, back electromotive force protection device, etc. to a conventional pilot type solenoid valve, wiring work using relay terminals is required, further increasing costs and reducing equipment reliability. There was a problem.

[Problem that the invention attempts to solve]

This invention uses a printed wiring board to electrically connect the pilot valve to the power supply, improving work efficiency and reducing work costs, as well as eliminating the causes of reduced equipment reliability due to incorrect wiring and poor welding. This is a problem that needs to be solved.

[Means for solving problems]

The present invention is a pilot type solenoid valve that switches the flow path of the main valve by the operating force of the pilot valve.
A printed wiring board with a power supply terminal to the pilot valve, a plug for power connection, and a printed wiring circuit for electrically connecting these is attached to the main valve, and the power receiving terminal of the pilot valve is connected to the power receiving terminal of the pilot valve. The above-mentioned problem is solved by making it possible to press-insert the valve so that it is electrically connected to the power supply terminal when attached to the main valve.

[Effect]

In the pilot type solenoid valve having the above configuration, when the power supply connection plug is connected to the power supply, the printed wiring circuit and power supply terminal of the printed wiring board, as well as the power receiving terminal of the pilot valve press-inserted into the power supply terminal, are connected. Power is supplied to the pilot valve via the pilot valve. Therefore, when the pilot valve is installed at a predetermined position on the main valve when manufacturing and assembling the solenoid valve,
Accordingly, the power supply terminal on the printed wiring board and the power reception terminal of the pilot valve are automatically connected, which not only improves workability but also prevents incorrect wiring.

〔Example〕

In FIG. 1 showing an embodiment of the present invention, a base 1 includes an input port 2, first and second output ports 3a, 3b, and first and second discharge ports 4a, 4.
b are drilled in each case.

The valve body 6 of the main valve 5, which is mounted on the base 1 via a sealing member, has a valve hole 7 in its longitudinal direction.
and a pilot hole 8 are penetrated, and the valve hole 7
is connected to the input port 2, the first and second output ports 3a and 3b by the opening formed in the enlarged diameter part.
It also communicates with the pilot hole 8 through a communication hole 8a provided in the enlarged diameter portion that communicates with the input port 2 as well as with the first and second exhaust ports 4a and 4b.

In the upper part of the valve body 6, a storage chamber 10 is formed between the peripheral protrusions 9, 9. Also,
Both end surfaces of the valve body 6 are provided with an end plate 1 having a communication hole 11 communicating with the valve hole 7 and a pilot communication hole 12 communicating with the pilot hole 8.
3 and 13, and the spool 14 inserted into the valve hole 7 forms a well-known five-port valve. Further, a well-known pilot valve 1 is mounted on the end plates 13, 13.
7 and 17 are attached with their electromagnetic portions 18 protruding above the storage chamber 10.

Printed wiring board 2 engaged on the protrusions 9, 9
0 has power supply terminals 21, 21 for the pilot valves 17, 17 on both sides, and a plug 22 for power connection in the center of the upper surface on the opposite side from the storage chamber 10.
However, indicator lights 23, 23 for the operation of the pilot valves 17, 17 are provided on both sides, and furthermore, on the side facing the containment chamber 10, there are electrical lights consisting of resistors, integrated circuits, etc. necessary for operating the solenoid valves, etc. , electronic components 24,...
is installed. In addition, the printed wiring board 20
A circuit for electrically connecting power supply terminals 21, 21, plugs 22, indicator lights 23, 23, and electrical and electronic components 24, . . . is printed and wired.

Electromagnetic section 1 in the pilot valves 17, 17
The power receiving terminals 19, 19 of 8 protrude downward from the electromagnetic part 18, and are connected to the pilot valves 17, 1.
7 to the main valve 5, the printed wiring board 2
The power supply terminals 21 and 21 provided on both sides of the power supply terminal 2 are provided at such a position that they are automatically press-inserted, and electrical connection is established by the press-insertion.

Further, the upper surface side of the printed wiring board 20 is covered with a protective cover 26 that has holes for exposing the plug 22, power receiving terminals 19, . . . and a housing chamber 25 for housing the indicator lights 23, 23. The plug 22 is connected to a power source by fitting into a socket 27 at the tip of a power supply line.

2 to 4 show the structure of the power supply terminal 21 according to the present invention and the mode of connection between it and a printed circuit, and the power supply terminal 31 made of a conductive material shown in FIG. The middle of the hollow cylindrical portion 31b connected to the cylindrical portion 31b is curved inward, and a plurality of notches 31c are provided at the distal end side of the hollow cylindrical portion 31b.
0 into the hole 32 formed in the notch 31c.
The elasticity of the hollow cylindrical part caused by the tsuba 31
The above-mentioned printing is performed by locking and fixing the ends of the hollow cylindrical portion a and the hollow cylindrical portion 31b to the edge of the hole 32 and contacting the electric conductor 33 formed on the inner surface of the hole 32 and its periphery. It is electrically connected to a wired circuit. Therefore, pilot valve 1
By inserting the power receiving terminal 19 of No. 7 into the hollow cylindrical portion 31b, it is electrically connected to the circuit on the printed wiring board 20.

The power supply terminal 34 shown in FIG.
34c is provided, and a recessed portion 34d facing inward is formed above the hollow cylindrical portion 34a, and the lower portion thereof is inserted into a hole formed in the printed wiring board 20, and a tongue portion formed by the lower notch 34c is formed. 34e is bent outward and welded or soldered to a printed circuit. The power receiving terminal 19 of the pilot valve 17 is electrically connected to the power feeding terminal 34 by being inserted into the hollow cylindrical portion 34a.

The power supply terminal 35 shown in FIG. 4 is made by expanding one end of a hollow cylindrical part 35a made of a conductive material and welding or soldering it to a printed wiring circuit. Spiral spring 35b
By bringing the power receiving terminal 19 of the pilot valve 17 into pressure contact with the terminal, the two are electrically connected via the spiral spring 35b.

In the pilot type solenoid valve having the above configuration, the pilot valve 1 is attached to the end plates 13, 13.
If you install 7, 17, the pilot valve 17, 17
The power receiving terminals 19, . . . are press-inserted into the power feeding terminals 21, . Therefore, when the plug 22 of the printed wiring board 20 is connected to a power source, power is supplied to the electromagnetic parts 18, 18 of the pilot valves 17, 17 via the printed wiring circuit, the power supply terminals 21, . . . and the power receiving terminals 19, . can.

Therefore, in the above pilot type solenoid valve,
Power is supplied to the left electromagnetic section 18 to cause the pilot fluid to flow into the pilot chamber at the left end of the spool 14, and the power supply to the right electromagnetic section 18 is cut off to open its pilot valve 17 to the outside, and the spool 14 is turned off. If the pilot fluid in the rightmost pilot chamber is discharged to the outside, the spool 14 will slide to the right, and if the left and right electromagnetic parts 18 are operated in the opposite manner to the above, the spool 14 will slide to the left. The pressure fluid from the input port 2 is transferred to the first or second output port 3.
a, 3b, and the first or second
Discharge fluid from output ports 3a and 3b to port 4
Discharge from a and 4b.

In the above embodiment, the pilot valves 17, 17 are provided on both sides of the valve body 6, but the pilot valve 17 may be a single solenoid provided only on one side of the valve body 6. Of course, the number of ports is not limited to 5 ports, and may be a 2-port valve or a 3-port valve.

Furthermore, if necessary, the electrical and electronic components 24 provided on the printed wiring board 20 may be provided only on the protective cover 26 side instead of on the main valve 5 side of the printed wiring board 20, or may be provided on both sides of the printed wiring board 20. You can also use electricity,
Of course, when the electronic component 24 is provided only on the protective cover 26 side, it is not necessary to provide the above-mentioned protrusions 9, 9 and the housing chamber 10.

[Effect of idea]

In this invention, power is supplied to the pilot type solenoid valve by using a printed wiring board without connecting lead wires, and at the same time when the pilot valve is attached to the main valve, its power receiving terminal is connected to the printed wiring board. Since it can be connected to the power supply terminal, work efficiency can be significantly improved and work costs can be significantly reduced, and there are no problems with incorrect wiring or poor welding, making it possible to improve the reliability of the equipment.

In addition, by using a printed wiring board in this invention, when adding an indicator or a back electromotive force protection device to a solenoid valve, the necessary circuits and electrical and electronic components can be installed in advance. It can be additionally disposed on the printed wiring board, and can be constructed extremely easily without complicating the structure.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention, and FIGS. 2 to 4 are longitudinal sectional views showing embodiments of the power supply terminal of the present invention. 5... Main valve, 17... Pilot valve, 19...
Power receiving terminal, 20...Printed wiring board, 21, 31, 3
4, 35...Power supply terminal, 22...Plug.

Claims (1)

[Scope of utility model registration request] In a pilot type solenoid valve that switches the flow path of the main valve by operating force of the pilot valve, the main valve is equipped with a power supply terminal to the pilot valve, a plug for connecting the power supply, and a printed wiring circuit to electrically connect these. A printed wiring board is attached, and the power receiving terminal of the pilot valve can be press-inserted so as to be electrically connected to the power supply terminal when the pilot valve is attached to the main valve. Pilot type solenoid valve with printed wiring board.