JPS5835905Y2 - Structure of electrical connection of solenoid valve - Google Patents

Description

[Detailed description of the invention] This invention relates to the structure of the electrical connection part of a solenoid valve used in hydraulic equipment, etc., and more specifically, the connection between the pin of the connection plug of the solenoid plunger device of the solenoid valve and the connection from an external power supply device, etc. This invention relates to the structure of an electrical component for making interconnections with electric wires.

The electrical equipment of a solenoid valve usually consists of a sealed box attached to the top of the valve body when the valve body is relatively small, and wires from an external control power source etc. are wired through conduits within this sealed box. An electrical connection is made between the connected wire and the coil of the solenoid plunger device of the solenoid valve.

In this sealed box, various circuit parts such as a rectifying element and a surge suppressor are housed as necessary, and an operation indicator light is also provided.

By the way, in the electrical equipment section of a conventional electromagnetic valve of this type, the sealed box is fixed to the valve body by mounting screws so as to cover the bolts that fix the valve body to the manifold, sub-plate, etc.

By the way, in most cases, the mounting screws are located inside the sealed box, and the connection terminals for external wires are fixedly installed inside the sealed box, so when installing a solenoid valve on the user's side, for example, it is necessary to connect the wires. If you do not secure the sealed box and valve body before starting work and remove the wiring before removing the casing, the electric wires inside the sealed box will get in the way and make it difficult to tighten the mounting screws. Become.

However, in general, this type of solenoid valve is shipped from the factory with a sealed box attached to the valve body, a solenoid plunger device attached to the valve body, and a connection lead of the solenoid plunger device connected to the sealed box. Normally, the container is covered, then packed and shipped, and the user also first makes sure that pollen, dirt, oil, etc. do not get into the sealed box, and then assembles the hydraulic equipment system first. Normally, electrical wiring is done after that, so if the user does not unpack the package and remove the sealed box from the connection button with the solenoid plunger device and the valve body, the valve body will be damaged. It cannot be attached to the manifold, so it requires extra work to remove the sealed box and then reinstall it.When repairing or maintaining the case, it is necessary to remove the connecting wires while loosening and tightening the mounting screws. It is necessary to remove and reinstall the sealed box, which not only causes poor work efficiency but also risks damaging the connecting wires that have been installed.

Furthermore, in conventional solenoid valves of this type, in order to secure the volume inside the sealed box, the upper part of the valve body is formed into a recess and a cover is placed over it to create a sealed box. In this case, the valve body itself cannot be miniaturized, and conversely, the structure cannot be applied to a small valve body, and a hole must be provided in the valve body for passing the connection lead wire from the lenoid plunger device in the case. Another drawback was that the number of man-hours required to process the valve body increased.

This idea was made in view of the above-mentioned situation, and it is possible to handle the bolts for fixing the manifold ° etc. independently from the outside of the electrical equipment even in a small valve body. In addition, the valve podium is fixed to the manifold by fixing the electrical component and the valve body independently with separate mounting screws, making it easy to install and remove the electrical component. The purpose is to provide an improved structure that makes it possible to

. That is, in the structure of the electrical connection part of the solenoid valve of this invention, the electrical part is placed and fixed on the top surface of the solenoid valve body, which is equipped with a solenoid plunger device on the side, and the body is mounted and fixed on the manifold etc. The outer wall surface of each of the bolt hole corresponding portions is recessed so as not to protrude into the upper space of the bolt hole on the upper surface of the body.

To explain this invention in detail together with the drawings, FIG. 1 is a partially sectional front view of a solenoid valve according to an embodiment of this invention, in which 1 is a valve body, and 2 is a solenoid plunger attached to both sides of the valve body. An electrical equipment part 3, which is a main part of this invention, is placed and fixed on the upper surface of a one-valve body 1.

As shown in FIG. 2, the electrical component 3 includes an electrical component 5 fixed to the valve body 1 with mounting screws 4, a pair of terminal boxes 6, 6 housed back to back within the electrical component 5, and a terminal box. The device is an integrally molded product made of resin, and is composed of an electrical component cover 7 that covers the upper surface of the electrical component 5 containing the valve body 1, and a 5 l. A depression 9 is provided at a position corresponding to each of the holes 8 so as not to form a part protruding into the upper space of the insertion hole 8.
While the valve body 1 remains fixed to the valve body 1, the bolt within the hole 8 can be rotated using a wrench or the like without having to touch the inside thereof.

As shown in FIG. 6, screw holes 10 are provided on both end surfaces of the electrical equipment section 50, respectively, for inserting electrical conduits from an external power source, etc., and correcting the plug. Holes 11 are respectively provided through which a pin 13 of a connecting plug 12 connected to the coil of the solenoid plunger device 2 can be inserted into the electrical component.

As shown in FIGS. 5 and 6, thick inner parts 14 are integrally molded in the center of both sides of the bottom surface of the electrical equipment section 5, and each thick part 14 has a through hole 15 passing through the bottom surface. The mounting screws 4 are inserted into these through holes, and the lower part of the mounting screw 4 is screwed into the valve body 1, thereby engaging the head of the B1 mounting screw 40 with the upper surface of the thick inner part 14. Tightening is done by .

In this case, preferably the through hole 1 as shown in FIG.
If an annular protrusion 16 is integrally formed on the upper hole edge of the hole 5 and the annular protrusion 16 is crushed by the lower surface of the head of the mounting screw 40 when tightening, the seal in the through hole 15 can be secured at the same time as the tightening. It will be fulfilled.

The cover 1 that covers the upper surface of the electrical component 5 has approximately the same outer shape as the outer periphery of the electrical component 5, and is given an upwardly curved shape in advance when it is not covered, as shown in FIG. be.

The cover 7 has screws 11 inserted in four holes 17 on the top surface of the electrical component 5.
′, and at the time of tightening, due to the above-mentioned diagonal shape, it is adhered all around the circumference without any floating seams.

The lower surface of the cover 7 is provided with a rib T' that is in contact with and fits around the inner space periphery of the upper surface of the electrical component part, and a ring is crimped to the outer periphery of the rib 7' by coming into contact with the outer periphery of the upper surface of the electrical component part 5. A shaped gasket 18 is attached to seal the top surface of the electrical equipment section 5.

The above-mentioned holes 17 are simply through-holes in the cover 7 and female screw holes in the electrical component 5, and these holes are provided at symmetrical positions with respect to the direction between the left and right end surfaces of the outer peripheral shape of the electrical component 5. It is provided at a position shifted in the above direction with respect to the outer circumferential shape of the internal space, so that when the s"'tz cover I is placed in the opposite direction, the screw holes 17 do not match between the cover and the electrical equipment section. This prevents mistakes in installing the cover I.

As clearly shown in FIG. 2, the cover 7 has two triangular translucent sealed windows 19 and a name plate 20 attached thereto.

The shape of the translucent sealed window 19 is not limited to the above-mentioned triangle, but may be any shape, preferably a shape having an arrow function, since it is provided to indicate the operation of the solenoid plunger devices 2, 2. That's fine.

The internal space of the electric equipment 5 has a symmetrical planar shape as shown in FIG. 5, and kite ribs 21 are bored in the inner wall at positions dividing the space on the left and right.

Two terminal boxes 6 having an outer circumferential shape matching the planar shape of the partial space as shown in FIG. 2 can be inserted back to back into the internal space.

In this case, even if only one terminal box 6 is inserted, the grooves 22 on both sides of the back surface engage with the lips 21, so even if the plug 12 is inserted and pulled out as described later, this movement within the electrical equipment 5 is difficult. It does not occur even when

The terminal box 6 has terminal portions 24. which form a recessed portion 23 spaced apart from each other and communicating in the front-rear direction at a position near the back of the upper surface of the terminal box 6.
24 are provided in an upright manner, and this terminal part is opened only on the sides facing each other, and the other three sides are covered with four partition walls 25. Therefore, when a pair of terminal boxes 6 are inserted back to back into the electrical equipment box, As shown in FIG. 7, when the terminal parts of different terminal boxes are separated by a partition wall 25 and adjacent to each other for common connection, etc., the U-shaped fittings 26 attached in FIG. 7 are attached to both terminal boxes. By attaching the terminals to adjacent terminals, the wiring can be easily connected without crowding the wiring.

Both terminal portions 24.24 of the terminal box 60 are mutually connected to the recessed portion 23.
Since there is a sufficient creepage distance between the terminals, there is no risk of short-circuiting between connecting wires that are connected between adjacent terminals.

The terminal box 6 is also provided with a cylindrical body 27 protruding from an deviated position on the upper surface of the terminal box 6, which communicates with the inside. A columnar body 28 is fitted, and its upper part protrudes so as to be located directly below the window 19 of the cover 7, as shown in FIG.

As shown in FIG. 8, the lower part of the solid columnar body 28 is located in the terminal box 6 directly above an indicator light 29 such as a light emitting diode, and the indicator light 29 is installed in such a position and other A circuit board 30 is housed in the terminal box 6 in order to attach and wire circuit elements, etc. ○The terminal box 6 protrudes in the shape of a nose with the upper surface of the tip slanted downward toward the front of the terminal box 6. A pair of connection jacks 32 are provided on both sides of the lower part of the portion 31, into which the pins 13 of the connection plug 12 are inserted. When the jack 32 is inserted in the correct position, the front end of the jack 32 faces the through hole 11 while straddling the thick portion 14 .

The connection jack 32 is fixed to the circuit board 30, and has a pair of conductor pieces 33 rising straight upward toward the terminal section.
are similarly fixed to both sides of the circuit board 300, and a space for installing the necessary circuit elements is secured between the conductor pieces.

The upper part of this conductor piece 33 becomes a horizontally bent terminal conductor 33' with a through hole, and is supported downwardly by a protrusion 34 integrally molded on the terminal box 6 at the button and terminal part 24. By overlapping the terminal conductor 33' on the top surface of the female screw fitting 35 inserted into the circuit board 3,
0 is suspended within the terminal box 6 by the conductor piece 33.

A screw 37 is screwed into the female screw fitting 35 from above through a washer 36, and the terminal conductor 33' is tightened to the metal fitting 35 together with the connecting wire by screwing in the screw 37, thereby establishing an electrical connection. It has become so.

The bottom surface of the terminal box 6 is closed by adhering a bottom cover 38 as shown in FIG.

In FIG. 1, at the end of the solenoid plunger device 2 is an end plug 39 including a bushing pin for manual operation. The handle is chamfered so that it can be tightened securely even when tightened with a low torque by manually rotating the grip part 41, and a large torque is required to loosen it. Section 42 is also provided.

In this embodiment, for example, as shown by the dashed line in FIG.
Even if the terminal box is introduced into the electrical equipment 5, it can be introduced smoothly into the electrical equipment from the inclined part at the tip of the terminal box without getting caught, and a passage without a partition wall is formed by the recess 23 in the axial direction of the electrical equipment. It can be connected smoothly to each terminal without bending the wire from the wire, and common connections between adjacent terminals can be easily and simply connected using the U-shaped fitting 26. Of course, there are screw holes for plugs on both sides. 10, 10 respectively, or may be introduced from one side and the wire from the other side to another solenoid valve can be drawn out. When only one screw hole 10 is used, the wire from the other side can be introduced. Various wiring configurations can be adopted, such as sealing the screw hole with a sealing plug 45 as shown in FIG.

In addition, since the terminal box 6 is housed in a plug-in manner that can be freely inserted into the electrical equipment 5, it is possible to change the performance of the solenoid valve simply by replacing the terminal box with a different internal circuit. Even in the event of a failure, the entire terminal box needs to be replaced, allowing for quick countermeasures.

As mentioned above, what is useful about the structure of this invention is that the recess 9 is provided so that the cover γ of the electrical equipment 5 can be easily removed without having to open it.
The installation and removal work between the valve body 1 and the manifold, etc. must be performed directly, and the internal wiring work for the electrical equipment can be done after the electrical equipment 5 has been fixed to the valve body 1, and then the valve body 1 can be fixed to the manifold, etc. This can be done at any time before or after.Therefore, there is no need for the user to remove and install the sealed box and valve body as in the past, and the solenoid valve configuration including electrical wiring can be manufactured in the factory. It is also possible to fix the valve body to a predetermined manifold or the like afterwards, thereby improving the reliability of the system.

The electrical equipment picture in the structure shown in the example includes the annular ridge 16 around the mounting hole with the valve body and the gasket 18 on the cover 7.
In addition, it has a screw io, a plug screwed into the io, and a sealed structure, so it is dustproof and waterproof, and has a solid structure.Furthermore, it is translucent even if a light emitting diode is used as an indicator light. Since the upper protruding portion of the solid columnar body 28 emits light over its entire surface, a clear operation indication can be made through the window 19 of the cover, and therefore, a great advantage can be achieved in use.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional front view of a solenoid valve according to an embodiment of this invention, Fig. 2 is an exploded perspective view of the electrical components that also constitute the main parts, and Fig. 3 is a sealing machine groove in the screw part for attaching the bottom of the electrical equipment. Fig. 4 is a front view of the electrical equipment cover, Fig. 5 is a plan view of the electrical equipment, Fig. 6 is a view taken along the line VI-VI in Fig. 5, and Fig. 1 is a terminal box. FIG. 8 is a plan view of the solenoid valve in the assembled state. FIG. 8 is a cross-sectional view of the terminal box as seen in the direction of the arrows ``--'' in FIG. 7. 1,...Valve body, 2...Solenoid plunger device, 5...Electrical equipment, 6...
・Terminal box, I...Electrical equipment cover, 9...
Recess, 10-... Screw hole for plug (conduit insertion hole), 11... Connection plug pin/through hole for insertion, 1
4... Thick wall part, 16... Annular projection, 1
7... Screw hole, 18... Packing, 1
9... Translucent sealed window, 21... Guide lip, 23... Recessed portion, 24... Connection terminal portion, 25... Partition wall, 28...Translucent solid columnar body, 30...Circuit board, 32...
... Connection Shirt Hisashi 33 ... Conductor piece.

Claims (1)

[Scope of utility model registration request] An electrical component is mounted and fixed on the upper surface of a solenoid valve body which is equipped with a solenoid plunger device on the side, and wiring connection between a connecting wire and a solenoid coil is made within the electrical component, and the body is attached to a manifold, etc. The electrical component is fixed to the body using a mounting screw different from the bolt for fixing the electrical component to the body, and the bolt hole on the top surface of the body for inserting the bolt is located outside the electrical component when viewed from the top surface of the body. A structure of an electrical connection part of a solenoid valve, characterized in that a recess is provided in the outer wall surface of the electrical equipment part of the bolt hole corresponding part so as to be exposed.