JP3647943B2 - solenoid valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electromagnetic valve, and more particularly to an electromagnetic valve having a mechanism for manually operating and locking a valve mechanism.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, an electromagnetic valve for switching the direction of an air cylinder is known which includes a manual operation mechanism that switches a valve mechanism by manual operation.
In such an electromagnetic valve, for example, by pressing a manual operation member, the valve mechanism is switched only while the manual operation member is pressed.
[0003]
On the other hand, for example, an electromagnetic valve for switching the direction of an air cylinder may require that the valve mechanism be continuously switched over a long time during maintenance of the air cylinder.
In such a case, it is practically difficult to continuously press the manual operation member for a long time.
[0004]
Therefore, conventionally, an electromagnetic valve having a lock mechanism for fixing the valve mechanism at a predetermined position by manual operation is known.
[0005]
[Problems to be solved by the invention]
However, the conventional electromagnetic valve provided with the manual operation mechanism and the lock mechanism described above has a problem that the structure becomes very complicated and it is difficult to incorporate it into a small electromagnetic valve.
[0006]
That is, recently, the solenoid valve has been rapidly miniaturized, and a small solenoid valve having an outer diameter of 10 mm and a length of about 30 to 50 mm has also been developed. And incorporating the locking mechanism was very difficult.
The present invention has been made to solve the conventional problems, and an object thereof is to provide an electromagnetic valve having a manual operation mechanism and a lock mechanism having a very simple structure.
[0007]
[Means for Solving the Problems]
The solenoid valve according to claim 1 is a solenoid portion in which a movable iron core is disposed, a valve portion in which a valve mechanism is disposed on an axial extension line of the movable core, and the shaft extension on the opposite side of the valve portion from the solenoid portion. A first manual operation member that is arranged on a line so as to be pivotable about the shaft extension line, and that manually operates the valve mechanism by movement by pressing toward the movable iron core; and the first manual operation member A cover member disposed on the outside of the protrusion of the first manual operation member, and a first manual operation member held in a moving position by the pressing by a change in position relative to the cover member due to the rotation of the first manual operation member. It has a holding mechanism and a second holding mechanism which is disposed outside the cover member and holds the first manual operation member in a moving position by the pressing .
[0008]
The electromagnetic valve according to claim 2 is the electromagnetic valve according to claim 1, wherein the first holding mechanism covers an outer peripheral portion of an end surface of the first manual operation member and is formed on the cover member. A protrusion formed on the outer periphery of the first manual operation member so as to protrude toward the inner flange portion, and a recess formed on the inner flange portion and accommodating the protrusion other than during holding. It is characterized by having.
[0009]
According to a third aspect of the present invention, in the electromagnetic valve according to the first or second aspect, the second holding mechanism includes a second manual operation member disposed so as to cover the cover member, and the cover member. A guide groove formed, a protrusion formed in the second manual operation member and fitted in the guide groove, and formed in the second manual operation member and engaged with the first manual operation member. And rotating means .
According to a fourth aspect of the present invention, in the electromagnetic valve according to the third aspect, the second manual operation member is detachably disposed on the cover member .
[0011]
[Action]
In the electromagnetic valve according to the first aspect, when the first manual operation member is pressed toward the solenoid part by a driver or the like, the movable iron core of the solenoid part is moved and the valve mechanism is manually operated.
[0012]
Further, when the first manual operation member is rotated by a driver or the like from this state, the relative position of the first manual operation member with respect to the cover member is changed, and the first manual operation member is locked at the movement position by the pressing. .
Further, a second holding mechanism that holds the first manual operation member in a position moved by pressing is disposed outside the cover member.
In the electromagnetic valve according to the second aspect, the protrusion formed on the outer periphery of the first manual operation member is accommodated in the recess formed in the inner flange portion of the cover member except when locked.
[0013]
On the other hand, at the time of locking, by rotating while pressing the first manual operation member, the projecting portion is removed from the concave portion, and the first manual operation member is locked at the movement position by the press .
[0014]
In the electromagnetic valve according to the third aspect , when the second manual operation member is fitted on the cover member, the protrusion of the second manual operation member is engaged with the guide groove of the cover member.
When the second manual operation member is rotated while pressing the second manual operation member from this state, the projecting portion moves along the guide groove, and at the same time, the first manual operation member is rotated by the rotation means. The manual operation member is locked at the moving position by pressing.
[0015]
In the electromagnetic valve according to the fourth aspect , the second manual operation member is detachable from the cover member.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
FIG. 1 shows an embodiment of an electromagnetic valve of the present invention, and this electromagnetic valve is used, for example, for switching the direction of an air cylinder.
This electromagnetic valve includes a solenoid part 11, a valve part 13, and a manual operation part 15.
The solenoid unit 11 includes a coil 19 wound around a bobbin 17, a yoke 21, a fixed iron core 23, and a movable iron core 25.
[0018]
The movable iron core 25 is pressed toward the valve portion 13 by a coil spring 27.
A guide member 29 is attached to the tip of the movable iron core 25.
A valve member 31 is incorporated in the center of the tip of the movable iron core 25 and is pressed toward the guide member 29 by a coil spring 33.
The valve portion 13 has a valve main body 35, and valve seats 35a and 35b are formed in a hole formed inward from the center of the upper and lower end surfaces.
[0019]
The valve seat 35a communicates with the supply port 35c, and the valve seat 35b communicates with the exhaust port 35d.
The supply port 35c communicates with a chamber 35f that communicates with the output port 35e via a valve seat 35a.
A valve member 37 is disposed together with the push member 39 in the chamber 35f.
[0020]
As shown in FIGS. 2 and 3, the push member 39 is formed with a pair of rod-shaped rod portions 39a.
The pair of rod portions 39a is formed in the valve body 35 and is inserted through the pair of through holes 35g.
[0021]
The tip is in contact with the end surface of the guide member 29.
The valve member 37 is pressed toward the valve seat 35 a by the coil spring 41.
The manual operation unit 15 includes a first manual operation member 43, a cover member 45, and a second manual operation member 47.
The cover member 45 is disposed on the opposite side of the valve body 35 from the solenoid portion 11.
[0022]
The cover member 45 has a U-shaped cross section, and is fixed to a recess 35 h formed on the end surface of the valve body 35 by, for example, ultrasonic welding.
A first manual operation member 43 is fitted in a chamber 35 f formed between the cover member 45 and the valve member 37.
A coil spring 41 is disposed between the first manual operation member 43 and the valve member 37.
[0023]
A coil spring 49 is arranged between the valve body 35 and the first manual operation member 43 is pressed toward the cover member 45.
An annular groove 43a is formed on the outer periphery of the first manual operation member 43, and an O-ring 51 is attached to the annular groove 43a.
A shaft portion 43 b having a reduced diameter is formed at the end portion of the first manual operation member 43, and is inserted into the central hole 45 a of the cover member 45.
[0024]
A locking groove 43c for locking a driver or the like is formed on the end surface of the shaft portion 43b of the first manual operation member 43.
FIGS. 4 to 6 show details of the cover member 45. In this cover member 45, an inner flange portion 45c projecting inward is formed at one end of a cylindrical main body portion 45b.
[0025]
Further, on both sides of the outer periphery of the main body portion 45b of the cover member 45, guide grooves 45d that are bent at two locations from the end face of the inner flange portion 45c are formed.
The guide groove 45d is formed in a crank shape and includes axial length direction grooves 45e and 45f and circumferential direction grooves 45g and 45h.
As shown in FIG. 5, a substantially triangular recess 45i is formed on the inner surface of the inner flange portion 45c at a position 180 degrees apart.
[0026]
And the protrusion 45j which protrudes from the inner surface of the inner side flange part 45c is formed adjacent to this recessed part 45i.
7 to 9 show the details of the first manual operation member 43, and an end face of the first manual operation member 43 is formed with a locking groove 43c for locking a driver or the like.
[0027]
On both sides of the outer periphery of the first manual operation member 43, protrusions 43d are formed at positions separated by 180 degrees.
A concave portion 43e is formed in the end face 43g portion which is shifted by 90 degrees from the projecting portion 43d, and the concave portion 43e and the end surface 43g are continued by the inclined surface 43f.
FIG. 10 shows a developed state of the fitting state between the bottom surface of the inner flange portion 45c of the cover member 45 and the outer periphery of the first manual operation member 43, and the solid line shows the state of FIG.
[0028]
FIGS. 11 to 13 show details of the second manual operation member 47, and the second manual operation member 47 is formed with a cylindrical portion 47 a that fits outside the cover member 45. Yes.
A bottom portion 47b is formed on one side of the tubular portion 47a.
One of the bottom portions 47b extends in the radial direction, and a tip tapered gripping portion 47c is formed.
[0029]
On both sides of the inner periphery of the cylindrical portion 47a, a pair of protrusions 47d are formed at positions separated by 180 degrees.
A protrusion 47e is formed on the inner surface of the bottom 47b, and a protrusion 47f is formed at the tip of the protrusion 47e.
In the solenoid valve described above, when the coil 19 of the solenoid unit 11 is not excited, as shown in FIG. 1, the valve seat 35b on the solenoid unit 11 side is closed by the valve member 33, and the valve seat 35a on the other side is closed. A gap is formed between the valve member 37 and the air supplied from the supply port 35c flows into the chamber 35f via the valve seat 35a and then supplied from the outlet port 35e to the air cylinder (not shown).
[0030]
On the other hand, when the coil 19 of the solenoid unit 11 is excited, the movable iron core 25 is attracted to the fixed iron core 23 side, and a gap is formed between the valve seat 35b on the solenoid unit 11 side and the valve member 33, and the other side. After the valve seat 35a is blocked by the valve member 37 and air in the air cylinder (not shown) passes through the outlet port 35e and flows into the chamber 35f, the rod portion 39a of the push member 39 and the through-hole 35g of the valve body 35 Flows into the valve seat 35b on the solenoid unit 11 side and is discharged from the exhaust port 35d.
[0031]
In addition, when the first manual operation member 43 is pressed toward the solenoid unit 11 by the tip of a driver or the like without the second manual operation member 47 fitted on the cover member 45, the first manual operation member 43 The push member 39 is pressed to the solenoid part 11 side, a gap is formed between the valve seat 35b on the solenoid part 11 side and the valve member 33, the valve seat 35a on the other side is closed by the valve member 37, and the solenoid part When the 11 coils 19 are excited, the air in the air cylinder (not shown) is discharged from the exhaust port 35d.
[0032]
Therefore, it is possible to switch the valve mechanism of the electromagnetic valve by manual operation while the first manual operation member 43 is pressed toward the solenoid unit 11 by the tip of the driver or the like.
When the valve mechanism is required to be continuously switched over a long time, such as during maintenance of the air cylinder, the valve mechanism is locked by the first manual operation member 43, or the second The valve mechanism is locked by the manual operation member 47.
[0033]
The valve mechanism is locked by the first manual operation member 43 in a state where the second manual operation member 47 is not fitted on the cover member 45 and the tip of the driver or the like is engaged with the locking groove 43c of the first manual operation member 43. The first manual operation member 43 is rotated while the first manual operation member 43 is pressed toward the solenoid part 11 side.
That is, in a state where the first manual operation member 43 is not pressed by the tip of the driver or the like, the first recess 45i formed in the inner flange portion 45c of the cover member 45 has a first portion as shown by a solid line in FIG. A protrusion 43d formed on the outer periphery of the manual operation member 43 is engaged.
[0034]
When the first manual operation member 43 is pressed by the tip of the driver or the like from this state, the protrusion 43 d of the first manual operation member 43 is detached from the recess 45 i of the cover member 45.
Then, when the first manual operation member 43 is rotated in the direction of arrow A in FIG. 10 from this state, the protrusion 43d of the first manual operation member 43 is brought into contact with the protrusion 45j of the cover member 45, It will be in the state shown with a dashed-two dotted line in a figure.
[0035]
This state is a locked state of the valve mechanism, and this state is maintained even when the pressing of the first manual operation member 43 to the solenoid part 11 side by the tip of the driver or the like is released.
On the other hand, this state is released by locking the tip of the driver or the like in the locking groove 43c of the first manual operation member 43, and rotating the first manual operation member 43 in the direction opposite to the arrow A in FIG. This is done by engaging the protrusion 43d of the first manual operation member 43 with the recess 45i formed in the inner flange portion 45c of the cover member 45.
[0036]
To lock the valve mechanism by the second manual operation member 47, the cylindrical portion 47a of the second manual operation member 47 is fitted on the cover member 45, and the second manual operation member 47 is pressed toward the solenoid portion 11 side. This is performed by rotating the second manual operation member 47 in the state.
[0037]
That is, as shown in FIGS. 14 and 15, when the tubular portion 47 a of the second manual operation member 47 is fitted to the cover member 45, the protrusion formed on the inner side of the bottom portion 47 b of the second manual operation member 47. The protrusion 47 f at the tip of the portion 47 e is engaged with a locking groove 43 c formed at the upper end of the first manual operation member 43.
At the same time, the protrusion 47 d formed on the inner periphery of the cylindrical portion 47 a of the second manual operation member 47 is engaged with the upper end of the guide groove 45 d formed on the outer periphery of the cover member 45.
[0038]
When the grip portion 47c of the second manual operation member 47 is pressed from this state, the projection 47d of the second manual operation member 47 moves along the axial length direction groove 45e of the guide groove 45d, and the guide groove 45d Located at the entrance of the circumferential groove 45g.
In this state, the locking groove 43c of the first manual operation member 43 is pressed by the protrusion 47f of the second manual operation member 47, and the protrusion 43d of the first manual operation member 43 is moved as described above. The cover member 45 comes out of the recess 45i.
[0039]
Then, when the gripping portion 47c of the second manual operation member 47 is rotated while being pressed in a state where a slight force is applied in the direction of the arrow B in FIG. The portion 47d moves along the circumferential groove 45g, the axial length direction groove 45f, and the circumferential groove 45h of the guide groove 45d, and is positioned on the back side of the circumferential groove 45h of the guide groove 45d.
[0040]
In this state, the first manual operation member 43 is rotated by the protrusion 47f of the second manual operation member 47, and the protrusion 43d of the first manual operation member 43 is moved by the cover member 45 as described above. Of the projection 45j.
This state is a locked state of the valve mechanism, and this state is maintained even when the pressing of the second manual operation member 47 to the solenoid unit 11 side is released.
[0041]
On the other hand, this state is released by rotating the second manual operation member 47 in the direction opposite to the arrow B in FIG. 15 and removing the second manual operation member 47 from the cover member 45.
In the electromagnetic valve configured as described above, the solenoid unit 11, the valve unit 13, the first manual operation member 43, and the cover member 45 are arranged on the same axis, and the cover is formed by turning the first manual operation member 43. Since the first manual operation member 43 is held in the moving position by pressing by the position change with respect to the member 45, the manual operation mechanism and the lock mechanism can be made very simple structures.
[0042]
As a result, a manual operation mechanism and a lock mechanism can be easily incorporated into a small solenoid valve.
In the above-described solenoid valve, the first locking mechanism includes the inner flange portion 45c formed on the cover member 45, the protrusion 43d formed on the outer periphery of the first manual operation member 43, and the inner flange portion 45c. The first locking mechanism can be made to have a very simple structure because it is formed of the concave portion 45i that is formed in the projection portion 43d and accommodates the protruding portion 43d.
[0043]
Further, in the above-described electromagnetic valve, the second manual operation member 47 that holds the first manual operation member 43 in the moving position by pressing is disposed outside the cover member 45. Thus, manual operation and lock operation can be easily performed.
Moreover, since it becomes possible to select operation by the 1st manual operation member 43 and the 2nd manual operation member 47, usability can be improved.
[0044]
Further, in the above-described solenoid valve, the second lock mechanism includes a second manual operation member 47 disposed so as to cover the cover member 45, a guide groove 45d formed in the cover member 45, and a second manual operation. Since the projection 47d is formed on the member 47 and fitted into the guide groove 45d, and the protrusion 47f is formed on the second manual operation member 47 and engages with the first manual operation member 43. The two lock mechanisms can have a very simple structure.
[0045]
Further, in the above-described solenoid valve, the second manual operation member 47 is detachable from the cover member 45, so that the second manual operation member 47 can be removed from the cover member 45 during normal operation. The second manual operation member 47 does not get in the way.
In the above-described embodiment, the example in which the guide groove 45d of the cover member 45 is formed in the crank strip to prevent the rotation in the return direction has been described, but the present invention is limited to this embodiment. For example, as shown in FIG. 16A, it may be formed in a simple L shape.
[0046]
Further, for example, as shown in FIG. 16B, an axial length direction groove 45k opening at the upper end of the cover member 45 may be formed at the end of the circumferential direction groove 45h. The cover member 45 can be removed from the second manual operation member 47 while the second manual operation member 47 is rotated to the lock position.
Furthermore, in the embodiment described above, an example in which the present invention is applied to a three-port valve has been described. However, the present invention is not limited to such an embodiment, and for example, a two-port valve, a five-port valve, etc. Can be applied.
[0047]
【The invention's effect】
As described above, in the solenoid valve according to claim 1, the solenoid portion, the valve portion, the first manual operation member and a cover member disposed on the same axis, the cover member by the rotation of the first manual operation member Since the first manual operation member is held at the moving position by pressing by the position change with respect to the manual operation mechanism and the lock mechanism, the structure can be made very simple.
[0048]
As a result, a manual operation mechanism and a lock mechanism can be easily incorporated into a small solenoid valve.
Furthermore, since the second holding mechanism that holds the first manual operation member in the position moved by pressing is arranged outside the cover member, manual operation and locking operation can be easily performed by the second holding mechanism. Can do.
Moreover, since it becomes possible to select operation by the 1st holding | maintenance mechanism and the 2nd holding | maintenance mechanism, usability can be improved.
In the electromagnetic valve according to claim 2, the first holding mechanism includes an inner flange portion formed on the cover member, a protrusion formed on the outer periphery of the first manual operation member, and a protrusion formed on the inner flange portion. Therefore, the first holding mechanism can have a very simple structure.
[0050]
In the electromagnetic valve according to the third aspect , the second holding mechanism is formed in the second manual operation member disposed so as to cover the cover member, the guide groove formed in the cover member, and the second manual operation member. Since the projecting portion fitted in the guide groove and the rotation means that is formed on the second manual operation member and engages with the first manual operation member, the second holding mechanism has a very simple structure. Can be.
In the electromagnetic valve according to the fourth aspect , since the second manual operation member is detachable from the cover member, the second manual operation member can be removed from the cover member during normal operation, thereby The member does not get in the way.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of an electromagnetic valve according to the present invention.
FIG. 2 is a cross-sectional view showing details of the push member of FIG. 1 and the vicinity thereof.
FIG. 3 is a perspective view showing details of the push member of FIG. 1;
4 is a perspective view showing details of the cover member of FIG. 1. FIG.
FIG. 5 is a cross-sectional view showing details of the cover member of FIG. 1;
6 is a bottom view showing details of the cover member of FIG. 1. FIG.
FIG. 7 is a cross-sectional view showing details of the first manual operation member of FIG. 1;
FIG. 8 is a side view showing details of the first manual operation member of FIG. 1;
FIG. 9 is a top view showing details of the first manual operation member of FIG. 1;
10 is an explanatory view showing a developed state of a locking state between the concave portion of the cover member of FIG. 1 and the protruding portion of the first manual operation member. FIG.
FIG. 11 is a cross-sectional view showing details of the second manual operation member of FIG. 1;
12 is a cross-sectional view showing details of the second manual operation member of FIG. 1. FIG.
13 is a top view showing details of the second manual operation member of FIG. 1; FIG.
14 is a cross-sectional view showing a state where the second manual operation member is locked in FIG.
15 is a top view of FIG.
16 is an explanatory view showing another example of a guide groove formed in the cover member of FIG. 1. FIG.
[Explanation of symbols]
11 Solenoid part 13 Valve part 15 Manual operation part 25 Movable iron core 43 1st manual operation member 43d Projection part 45 Cover member 45c Inner flange part 45d Guide groove 45i Recess 47 Second manual operation member 47d Projection part 47f Projection part

Claims (4)

A solenoid part in which the movable iron core is disposed;
A valve portion in which a valve mechanism is disposed on an axial extension line of the movable iron core;
The valve portion is disposed on the shaft extension line on the opposite side to the solenoid portion of the valve portion so as to be pivotable about the shaft extension line, and the valve mechanism is manually operated by movement by pressing toward the movable core side. 1 manually operated member;
A cover member disposed outside the protrusion of the first manual operation member;
A first holding mechanism for holding the first manual operation member in a moving position by the pressing by a position change with respect to the cover member by rotation of the first manual operation member;
A second holding mechanism that is disposed outside the cover member and holds the first manual operation member in a position moved by the pressing;
A solenoid valve characterized by comprising: The solenoid valve according to claim 1, wherein
The first holding mechanism includes an inner flange portion formed on the cover member so as to cover an outer peripheral portion of an end surface of the first manual operation member;
A protrusion formed on the outer periphery of the first manual operation member to protrude toward the inner flange portion;
A recess that is formed in the inner flange portion and accommodates the protruding portion other than during holding;
A solenoid valve characterized by comprising: The solenoid valve according to claim 1 or 2,
The second holding mechanism includes:
A second manual operation member disposed over the cover member;
A guide groove formed in the cover member;
A protrusion formed on the second manual operation member and fitted into the guide groove;
Rotation means formed on the second manual operation member and engaged with the first manual operation member;
Solenoid valve, characterized in that it comprises a. The solenoid valve according to claim 3,
The electromagnetic valve according to claim 1, wherein the second manual operation member is detachably disposed on the cover member .

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