JPS6214459Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a solenoid valve used in control devices for hydraulic and pneumatic equipment.

In the case of conventional electromagnetic valves, as is also known from Japanese Utility Model Application Publication No. 129922/1983, a part of the side surface of the valve body is recessed, and a receptacle is directly fixed within the narrow recess. In addition, a solenoid plug pin fixed to the end face of the valve body was inserted into the contactor provided in the receptacle. In such a configuration, when installing the valve body in a high place of mechanical equipment, if you want to wire the power supply to the valve body after the valve body is installed, it is necessary to climb up to that dangerous high place and install the valve body in a narrow place. There was a work disadvantage in that wiring had to be connected to the receptacle fixed in the recessed part of the side surface.

Therefore, in order to eliminate the above-mentioned drawbacks, it has been considered to form an engaging recess in advance in the recessed part of the valve body, and to make a corresponding engaging pawl protrude from the receptacle so that the receptacle can be freely engaged and detached. However, forming an engagement recess in the recess in the valve body, which is usually made of iron, requires a large amount of processing cost just to form the recess in the valve body. Forming the valve body requires even greater mechanical processing costs, which poses the problem of making the cost of the valve body extremely high. Furthermore, when attaching and detaching the receptacle to and from the recessed portion, if the engagement of the engaging portion is made strong, it becomes difficult to handle the attachment and detachment, and if the engagement is made weak, it may be damaged by the tensile force of the electric wire or during operation. The problem is that it comes off due to vibration.

This invention eliminates the above-mentioned conventional problems, does not require expensive machining costs such as forming recesses on the valve body, and the receptacle can be easily attached and detached from the valve body. An object of the present invention is to provide a solenoid valve that does not come off even if a strong force is applied to the receptacle or if vibration occurs.

The present invention takes the measures as described in the claims above, and its effects are as follows.

If a separate terminal box is attached to the side of the valve body, the receptacle can be housed in the same manner as in the conventional valve body having a recessed portion. After the valve body is attached to the mechanical equipment, remove the receptacle inside the terminal box from the terminal box (remove the retaining claw from the retaining hole), take the receptacle out to a low and wide area, and connect the electric wire. After that, bring the receptacle into the terminal box and fit the retaining claw into the retaining hole.
Next, when the tip of the plug pin, which is prevented from bending in the plug pin insertion hole, is fitted into the socket, electricity is supplied to the coil assembly and the socket is prevented from rising (the receptacle is rising) at the same time.

The drawings showing the embodiments of the present application will be described below. Figures 1 to 3 show solenoid valves,
1 is an electromagnet, 2 is a lamp device, and 3 is a valve device.

First, the electromagnet 1 will be explained. 4 is a coil assembly. In this coil assembly 4, 5 is a bobbin, 6 is a coil made of a winding wound around the bobbin 5, and these are molded into an annular shape. 7 is a cylindrical yoke fitted around the outer periphery of the coil 6, and 8 and 9 are disc yokes fitted to the cylindrical yoke 7 with the bobbin 5 in between. They are fixed to each other by fastening means such as attachment. Through holes 8a and 9a are bored in the center of the disk yokes 8 and 9 so as to overlap with the bobbin hole 5a. 12
A housing is molded with resin such as epoxy or polyester so as to embed the cylindrical yoke 7 and disc yokes 8 and 9 therein. In this housing 12, 13 is a base wall that comes into contact with the end surface of the valve body, 14 is a tip wall, and through holes 13a and 14a are provided in the center of these walls. 1
Reference numeral 5 denotes a circumferential side wall, and in FIG. 2, a pin holding portion 16 that can come into contact with an end surface of a terminal box, which will be described later, is formed in a projecting shape on the upper side. Reference numeral 17 denotes a fitting chamber formed on the terminal box side of the pin holding portion 16, into which a lamp device to be described later can be fitted. Plug pins 18, 18 are held by the pin holding portion 16, and extend through the inside of the fitting chamber 17 and protrude toward the terminal box. A lead wire 19 connects the plug pins 18, 18 and the coil 6. Next, 20 is a pressure resistant tube assembly. In this pressure-resistant tube assembly 20, 21 is a cylindrical body, and the left end portion in FIG. 2 is screwed and fixed to the valve body. As is well known, a fixed iron core and a movable iron core are fitted inside the cylindrical body 21. In addition, this cylindrical body 21
The bobbin hole 5a of the coil assembly 4 and the through holes 8a, 9a, 13a, and 14a are fitted into the coil assembly 4. 22 is a threaded part carved on the outer periphery of the tip of the cylindrical body 21, 23 is a nut screwed into the threaded part 22,
The coil assembly 4 is fixed to the valve body by pressing the tip wall 14a of the housing 12.
Reference numeral 24 indicates a push pin fitted into a hole in the cylinder body 21 so as to be slidable in the axial direction. Reference numeral 25 indicates a return spring that urges the push pin 24 in the direction of removal. By pushing the push pin against the return spring 25, the housing is removed. The movable iron core can be operated from the outside of 12. Next, the lamp device 2 shown in detail in FIGS. 4 to 8 will be explained. 2
Reference numeral 6 denotes a lamp storage body fitted into the fitting chamber 17 of the housing 12, which is molded from transparent resin and has a lamp storage space 27 formed inside. In this lamp storage body 26, reference numeral 28 denotes an edge portion having a chevron-shaped cross section formed around the entire circumference at the tip of the fitting portion as shown in FIG. 4, and as shown in FIG. It bites into a gasket 29 interposed between the inner surface of the chamber 17 and seals the lamp storage space 27 to prevent water from entering from the outside. 3
0 is a transparent wall facing the outside, 31 is a contact wall facing the end face of a terminal box, which will be described later, and 32 and 32 are contact walls 3.
Plug pins 18, 18 are inserted into the plug pin insertion holes 32, 32, which are provided in the plug pin insertion holes 1. 33 is a plug pin insertion hole 32,
As shown in FIGS. 5 and 6, a gasket 34 is fitted into an annular gasket groove formed on the outer surface of the abutting wall 31 so as to surround the abutment wall 32, and this gasket 34 is crimped onto the end surface of the terminal box to secure the plug pin. 18, 18 parts are sealed. Reference numerals 35 and 35 denote connection cylinders whose plug pin insertion holes 32 and 32 portions are projected into the lamp storage space 27, and insertion grooves 36 and 36 are cut from the tip portions as shown in FIGS. 4, 5, and 7. Pressing pieces 37, 37 are formed by folding. These pressing pieces 37, 37 can be bent inwardly and outwardly to some extent by their own elasticity. Next, 38 is a neon lamp exemplified as a light emitting body housed near the light-transmitting wall 30 in the lamp storage space 27, and one of the connecting legs 38a is connected to one of the connecting cylinders 30 mentioned above.
is inserted into the insertion groove 36 of the plug pin 18 and pressed against the plug pin 18 by the pressing piece 37, and the other connecting foot line 38
b is connected to one connecting leg of the resistor shown below. Note that a light-emitting body such as a light-emitting diode may be used as the light-emitting body. Reference numeral 39 denotes a resistor which is also housed in the lamp storage space 27, and one connecting leg 39a is connected to the other connecting cylinder 3 mentioned above.
5 is inserted into the insertion groove 36 and pressed against the plug pin 18 by the pressing piece 37, and the other connecting foot wire 3
9b is connected to the connecting foot wire 38b of the neon lamp 38, and wired as shown in FIG. Next, the valve device 3 shown in detail in FIGS. 11 to 15 will be explained. Reference numeral 40 denotes a valve body, and although not shown in the drawings, a valve switching mechanism such as a spool and a spool return spring is provided therein as is well known. A mounting surface 40a is formed on the upper side of the valve body 40 in FIG. 2 for mounting a terminal box, which will be described later.
1 is provided. 42 is a terminal box. In this terminal box 42, 43 is a bottom wall, and 44 is a bottom wall 4.
3 is a mounting hole provided to match the mounting screw hole 41, and a mounting screw 45 is inserted into this mounting hole 44 and screwed into the mounting screw hole 41, whereby the terminal box 42 is attached to the valve body 40. is integrally fixed to. 46 is an annular relief groove formed on the lower surface of the bottom wall 43 to surround the attachment hole 44 as shown in FIG. The seal ridge 47 is an annular seal ridge that gradually becomes smaller in diameter so as to narrow the hole 44 and protrudes from the lower surface of the bottom wall 43 to some extent. As shown in Figure 17, it is crushed and a part of it bites into the thread groove of the mounting screw 45,
This seals the inside of the terminal box 42 to prevent water from entering through the mounting hole 44. 48 is the end wall, 4
Numerals 9 and 49 are plug pin insertion holes provided in the end wall 48, into which the plug pins 18 and 18 are inserted. Reference numerals 50 and 50 denote side walls which can be bent to some extent due to their own elasticity. Reference numerals 51, 51 are retaining holes for positioning formed on the inner surfaces of the side walls 50, 50, into which retaining claws of the receptacle body, which will be described later, are fitted. Reference numerals 52, 52 are stopper pieces protruding near the upper edges of the inner surfaces of the side walls 50, 50, and are designed to catch the left and right movement of the receptacle main body in FIG. These stopper pieces 5
2 and 52 may be provided protruding from the bottom wall 43. next,
Reference numeral 53 denotes a receptacle for power supply for operation fitted in the terminal box 42. This receptacle 53
In the figure, 54 is a receptacle body, which is molded from a synthetic resin material. In this receptacle body 54, reference numerals 55, 55 are connection spaces whose upper and left sides are open in FIGS. 2 and 11, and are formed by a side wall 54a, a partition wall 54b, a front wall 54c, and a bottom wall 54d. ing. 56,56
2 is a socket protection portion projecting from the front (right side in FIG. 2) of the front wall 54c, and socket insertion holes 57, 57 are formed in each of the socket protection portions. Numerals 58 and 58 are fitting grooves formed on the inner surfaces of the side wall 54a and the partition wall 54b, and 59 and 59 are screw fitting holes provided at predetermined positions in the bottom wall 54d. 60, 60 is the side wall 5
4a, 54a are protrudingly provided near the upper ends of their outer surfaces, and their lower surfaces are formed into slopes 60a, 60a as shown in FIGS. 12, 14, and 15. The receptacle body 54 shown above is connected to the terminal box 42.
The socket protection parts 56, 56 are fitted as much as possible inside the socket along the end wall 48, and thereby the retaining claw 6
0 and 60 are fitted into the retaining holes 51 and 51, and the upper and lower
Lateral movement is prevented, and the rear ends of the side walls 54a, 54a are engaged with the stopper pieces 52, 52 to prevent lateral movement. Next, reference numerals 61 and 61 denote socket contacts consisting of a socket 61a and a terminal plate 61b, respectively, which are integrally made of a conductive material. The socket 61a is fitted into the socket insertion hole 57 and the plug pin 18 is fitted therein, and the terminal plate 61b is fitted into the fitting grooves 58, 58. 62, 62 are screw holes provided in the terminal plate 61b, and 63, 63 are fitting grooves 58, 58, respectively.
Nuts 64 and 64 are pressers, respectively.
65 and 65 are terminal screws, respectively, and this terminal screw 65
After being screwed into the nut 63, the tip thereof is fitted into the screw insertion hole 59, thereby preventing the socket contact 61 from being pulled out. As is well known, an external electric wire is sandwiched between the terminal plate 61b and the wire presser 64. 66 is a cover plate of the terminal box 42, and a gasket 67 is attached to the upper surface of the terminal box 42 with a mounting screw 68. 66a is a wire port.

The structure described above is assembled as follows. First, the valve body 40 in the valve device 3
The bottom wall 43 of the terminal box 42 is abutted against the mounting surface 40a of the terminal box 42, and is fastened and fixed with the mounting screws 45.
By tightening the mounting screw 45, the seal dam 47 of the terminal box 42 is crushed from the state shown in FIG. 16 to the state shown in FIG. be done. On the other hand, the receptacle 53 is assembled as follows. First, the socket 61a and terminal plate 61b of the socket contact 61 are fitted into the socket insertion hole 57 and the fitting grooves 58, 58 of the receptacle body 54, respectively, and the nut 63 is fitted into the fitting grooves 58, 58, respectively. Thereafter, the terminal screw 65 inserted into the screw hole 62 of the terminal plate 61b is screwed into this nut 63, and the tip of the terminal screw 65 is inserted into the screw insertion hole 59 of the receptacle body 54, thereby allowing the The butt contact 61 is prevented from being pulled out. Further, the other socket contact 61 is assembled in the same manner to assemble the receptacle 53. Next, the receptacle body 54 of this receptacle 53 is
As shown in FIG. 1, it is inserted into the terminal box 42. In this case, the retaining claws 60, 6 of the receptacle body 54
0 is connected to the terminal box 42 by its slopes 60a, 60a.
The side walls 50, 50 of the terminal box 42 are pushed apart and inserted into the terminal box 42. And the bottom wall 4 of the receptacle body 54
3 is inserted to the position where it contacts the bottom wall 43 of the terminal box 42, the retaining claw 6 of the receptacle body 54 is inserted.
0,60 is fitted into the retaining hole 51 of the terminal box 42,
The side walls 54a, 54a of the receptacle body 54 are engaged with the stopper pieces 52, 52 of the terminal box 42,
This prevents the receptacle body 54 from moving vertically and horizontally in FIG. Next, an external electric wire is connected between the terminal plate 61a and the wire retainer 64, and then the cover plate 66 is attached to the terminal box 42 via the packing 67 with the mounting screws 68. On the other hand, the lamp device 2
is assembled into the coil assembly 4. First of all,
A neon lamp 38 and a resistor 39 are stored in the lamp storage chamber 27 of the lamp storage body 26 as shown in FIGS.
A is inserted into one of the insertion grooves 36, and a connecting leg 39a of the resistor 39 is inserted into the other insertion groove 36, respectively.
After that, the plug pin insertion hole 3 of the lamp housing 26 is
2 and 32 are fitted into the plug pins 18 and 18, and the lamp storage body 26 and packing 29 are fitted into the fitting chamber 17 of the coil assembly 4. As a result, the connecting legs 38a, 39a of the neon lamp 38 and the resistor 39 are pressed against the plug pins 18, 18 by the pressing pieces 37, 37, and are electrically connected. Further, the edge portion 28 of the lamp storage body 26 bites into the gasket 29 and is sealed to prevent water from entering the lamp storage chamber 27. Also, a gasket 34 is provided in the gasket groove 33 of the lamp storage body 26.
is fitted. Next, the valve body 40 of the valve device 3
Pressure-resistant tube assembly 2 in electromagnet 1
0 cylinder body 21 is screwed and fixed, and the bobbin hole 5a and through hole 8a of the coil assembly 4 are connected to this cylinder body 21.
9a, 13a, 14a are fitted, and the plug pins 18, 18 are inserted into the plug pin insertion hole 4 of the terminal box 42.
9, 49, and the base wall 13 of the housing 12
is brought into contact with the end face of the valve body 40, and the contact wall 31 of the pin holding portion 16 and the lamp storage body 26 is brought into contact with the end face of the terminal box 42. As a result, the plug pins 18, 18 are connected to the sockets 61 of the socket contacts 61, 61.
a, 61a, and the gasket 34 is crimped to the end face of the terminal box 42 to connect the plug pins 18, 18.
The part is sealed. Thereafter, the nut 23 is screwed onto the threaded portion 22 of the cylinder 21, thereby fixing the lamp device 2 and the electromagnet 1 to the valve body 40. With the above steps, assembly of the electromagnet is completed.

Furthermore, in the solenoid valve configured as described above, since the lamp device 2 is installed at a position to the side of the coil 6 and at a position facing the end face of the terminal box 42, the entire solenoid valve is shown in FIG. The length in the horizontal direction and the height in the vertical direction in FIG. It can be assembled in virtually the same space as a solenoid valve.

In addition, when using the solenoid valve with the above configuration, it is necessary to connect the socket contact 6 from the external electric wire.
1, 61 is supplied with current, and the plug pin 18, 1
8, the neon lamp 38 lights up and its light passes through the transparent wall 30 of the lamp housing 26, making it possible to see the light from the outside. In this case, since the light can be checked next to the terminal box 42, when repairing a failure in the terminal box 42, etc., it is possible to check whether the neon lamp 38 is lit or not. Also, plug pin 1
Since the neon lamp 18 lights up when the plug pins 8 and 18 are energized, it is possible to check whether or not there is poor contact between the plug pins 18 and the socket contacts 61 and 61.

9 and 10 show different circuit examples of the lamp device. In FIG. 9, a varistor 69 for surge absorption is connected in parallel with the neon lamp 38, and in FIG. 10, a light emitting diode 70, 7
0 is used. FIGS. 18 and 19 show different embodiments of the part where the terminal box 42 is attached to the valve body 40, in which a collar 71 is formed that bites into the lower edge of the attachment hole 44, and a sealing ridge is formed slightly away from the attachment hole 44. 72 is formed, and by crushing this seal dam 72, the biting collar 71 is attached to the mounting screw 45.
It is bitten into the thread groove. Figure 20, 2nd
FIG. 1 shows a different embodiment of the connecting part between the plug pin 18 and the foot line 38a for connecting parts such as a light emitter in the lamp device 2. A groove 73 is formed on the inner surface of the plug pin insertion hole 32, and a groove 73 is A connecting leg wire 38a is inserted.

As described above, in the present invention, a terminal box is attached to the side surface of the valve body that has the end surface to which the coil assembly is to be joined, and the terminal box is attached to the end surface of the terminal box on the same side as the end surface of the valve body. A plug pin insertion hole is formed in the end face of the valve body and the end face of the terminal box, and one side of the coil assembly is fixed to the valve body in a state that spans both the end faces and can be detachably attached to the valve body. A plug pin, the base of which is held by the pin holding portion of the coil assembly, projects from a portion of the one surface of the assembly that faces the plug pin insertion hole, and the tip of the plug pin passes through the insertion hole. The terminal box is inserted into the terminal box so that it can be inserted and removed freely, and the terminal box has an opening on the side opposite to the valve body side, and the opening is provided in the terminal box at a location near the plug pin insertion hole. A receptacle is inserted through the socket, and the receptacle includes a receptacle body sized to allow insertion into the location through the opening and a socket contact fixed to the receptacle body. The butt contact consists of a socket for inserting the plug pin, a terminal plate formed integrally with the socket and having a terminal screw for connecting an external electric wire, and further includes an outer surface of the receptacle body and an inner surface of the side wall of the terminal box. A retaining pawl and a retaining hole are respectively provided at opposing positions of the receptacle body so as to engage with each other to prevent the receptacle body from moving toward the opening. A stopper is provided integrally with the terminal box at a position on the side opposite to the coil assembly to prevent the receptacle body from moving toward the side opposite to the coil assembly. The positional relationship between the socket in the butt contact and the plug pin is such that the plug pin inserted into the terminal box from outside the end surface of the terminal box through the plug pin insertion hole is located inside the socket, and the socket is aligned with its own axis. By configuring the openings to be prevented from moving in the direction of the intersecting openings, the following effects can be obtained. That is, even if the recess is not formed by expensive machining on the valve body, the receptacle can be sufficiently electrically protected by attaching the terminal box, which can be formed separately and at low cost.

Furthermore, even if a receptacle is installed inside a terminal box attached to the valve body, the receptacle can be taken out from the terminal box when connecting electric wires to the receptacle, and in that case, the retaining claw It has the advantage that the receptacle can be easily pulled out upwardly through the upper opening of the terminal box simply by disengaging the retaining hole. Next, when assembling the receptacle into the terminal box, the engagement is achieved again by inserting the receptacle downward through the opening, so that the receptacle remains fixed to the terminal box;
This has the effect of making it easier to perform both removal and installation operations.

Moreover, even if the receptacle is easy to remove and install when connecting wires, one side of the coil assembly must be attached to the end face of the valve body and terminal box after the installation as described above to make it ready for operation. As a result, the plug pin passes through the plug pin insertion hole on the end face of the terminal box, enters the terminal box, and has its axis in a direction that intersects with the direction in which the receptacle is pulled out.The plug pin is inserted into the socket in the receptacle. Make electrical connections. With this, not only the electrical connection is completed, but also the fact that the base of the plug pin to be connected to the socket is held by the holding part, and that the plug pin is passed through the plug pin insertion hole. The presence of the stopper firmly prevents the receptacle from floating upward, and has the effect of preventing the receptacle from falling off due to vibrations during operation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is a plan view of the solenoid valve with a part of the cover plate cut away, FIG. 2 is a front view of FIG. 1 showing the main part in cross section, and FIG. The figure is a right side view of Fig. 2, Fig. 4 is a sectional view taken along the - line in Fig. 5 showing the lamp device part, and Fig. 5 is a right side view of Fig. 4.
A cross-sectional view taken along the line 6 with the resistor shown in the figure removed.
The figure is a plan view seen from above in Fig. 5, Fig. 7 is an exploded perspective view of the lamp device, Fig. 8 is an explanatory diagram showing the electrical wiring of the lamp device, and Figs. 9 and 10 are different types of the lamp device. An electric circuit diagram showing the embodiment, FIG. 11 is an exploded perspective view of the terminal box and receptacle, FIG. 12 is a sectional view of the terminal box and receptacle, FIG. 13 is a plan view of the receptacle, and FIG. 14 is a diagram of the terminal box and receptacle. 15 is a rear view of FIG. 14, FIG. 16 is a cross-sectional view of the attachment part between the valve body and terminal box before installation, and FIG. 17 is a cross-sectional view of the part shown in FIG. 16 after installation. 18
The figure is a sectional view showing different embodiments of the mounting part between the valve body and the terminal box before installation, and Figure 19 is the first cross-sectional view after installation.
8 is a cross-sectional view of the portion shown in FIG. 20, FIG. 20 is a cross-sectional view taken along the - line in FIG.
Cross-sectional view taken along the XI-XI line. 2... Lamp device, 3... Valve device, 6... Coil, 12... Housing, 18... Plug pin,
26... Lamp storage body, 38... Neon lamp (luminous body), 40... Valve body, 42... Terminal box, 6
1...Socket contact.

Claims (1)

[Scope of utility model registration request] A terminal box is attached to the side surface of the valve body that has the end surface to which the coil assembly is to be joined, and
A plug pin insertion hole is formed in the end face of the terminal box on the same side as the end face of the valve body, and one side of the coil assembly is provided in the end face of the valve body and the end face of the terminal box so as to straddle both end faces. and is detachably fixed to the valve body, and a plug pin whose base portion is held by a pin holding portion of the coil assembly is protruded from a portion of the one side of the coil assembly that faces the plug pin insertion hole. At the same time, the tip of the plug pin is inserted into the terminal box through the insertion hole in a freely removable manner, and the terminal box is opened on the side opposite to the valve body, and the tip of the plug pin is inserted into the terminal box through the insertion hole. , a receptacle inserted through the opening is placed in a location near the plug pin insertion hole, and the receptacle is formed in a size that allows insertion into the location through the opening. The socket contact is composed of a main body and a socket contact fixed to the main body, and the socket contact is composed of a socket into which the plug pin is inserted, and a terminal plate formed integrally with the socket and having a terminal screw for connecting an external electric wire. Further, a retaining pawl and a retaining hole are provided at positions facing each other between the outer surface of the receptacle body and the inner surface of the side wall of the terminal box, which engage with each other to prevent the receptacle body from moving toward the opening. Further, a stopper for preventing the receptacle body from moving toward the side opposite to the coil assembly is integrated with the terminal box at a position on the side opposite to the coil assembly of the receptacle body inside the terminal box. On the other hand,
The positional relationship between the socket in the socket contact fixed to the receptacle body and the plug pin is such that the plug pin inserted into the terminal box from outside the end surface of the terminal box through the plug pin insertion hole is located inside the socket. The solenoid valve is configured to prevent the socket from moving in the direction of the opening that intersects with the axis of the solenoid valve.