JPH0249433B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is for rotating a movable body such as a valve body in a ball valve, a butterfly valve, or other valve devices, and controlling the opening and closing of those valve devices. The present invention relates to a method of adjusting the range in which the output shaft side of a rotary drive device can be manually operated.

[Conventional technology]

2. Description of the Related Art A manually adjustable electric rotating device for controlling the opening and closing of a valve device, etc. is already known, as disclosed, for example, in Japanese Utility Model Publication No. 1983-693.

11 and 12 are almost the same as those shown in the above publication as FIGS. 5 and 6, and in this conventional one, the valve body (not shown) in the valve device A driven plate b is firmly fitted to the intermediate portion of the coupled output shaft a, and a gear c serving as a driving plate, which is pivotally fitted to the output shaft a, is rotated in one direction by a motor e via a pinion d. , and an arcuate groove f with an opening angle of approximately 90° centered on the output shaft a is formed on the side surface of the gear c facing the driven plate b.
A pin g protruding from the side surface of the driven plate b is fitted into the pin g.

In this conventional device, the operation of the motor e causes the pinion d, the gear c, the engagement of the arcuate groove f of the gear c with the pin g, and the driven plate b, etc.
By rotating the output shaft a in one direction, the valve body in the valve device can be opened and closed by the drive of the motor e, and in the event of a failure of the motor e or a power outage, the pin g will float in the arcuate groove f. The valve device can be opened and closed by manually rotating the output shaft a within a range of approximately 90° using a handle, a spanner (both not shown), or the like.

[Problem to be solved by the invention]

In the conventional device as mentioned above, the opening and closing of the valve body is 90
It can only be applied to valve devices that fully close and fully open in units of °C.If you want to apply a valve device that opens and closes in 120° or 60° increments, such as a three-way valve, for example, a gear It is necessary to replace c with another gear that has an arcuate groove with an opening angle of 120° or 60°, and for that purpose, it is necessary to prepare a large number of gears c with different opening angles of the arcuate groove. The problem is that it does not.

In view of the drawbacks of the conventional rotary drive device, the present invention provides the following features in this type of rotary drive device:
By providing a method for adjusting the manually operable range of the output shaft side with a simple operation, one rotary drive device can be used for various types of driven objects with different operating angles of the movable body, especially the angle at which manual operation is desired. The purpose is to make it applicable to devices.

[Means to solve the problem]

In order to achieve the above object, the method for adjusting the manually operable range in a rotary drive device of the present invention connects an output shaft to a movable body of a driven device, and connects the output shaft to an electric drive means and a manual operation range. In a rotary drive device configured to rotate the movable body by rotating the movable body, a drive plate rotated by the electric drive means and a driven plate connected to the output shaft, disposed on the same axis, and provided with an arcuate groove centered on the axis on each opposing end surface of the driving plate and the driven plate,
The present invention is characterized in that the relative rotatable angle of the driven plate with respect to the driving plate is adjusted by changing the number of restraining bodies fitted between the arcuate grooves.

The restraining body can be a ball or a cylinder.

Further, the lengths of the arcuate grooves provided on the opposing surfaces of the driving plate and the driven plate may be equal to each other or may be different from each other.

[Effect]

By changing the number of restraint bodies fitted between both arcuate grooves, the relative rotatable angle of the driven plate with respect to the driving plate is changed.

That is, by increasing or decreasing the number of restraining bodies by one, the relative rotatable angle of the driven plate with respect to the driving plate decreases or increases by twice the angle seen by the output shaft corresponding to one restraining body.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.
This will be explained with reference to the figures.

Fig. 1 shows an example of a rotary drive device used to carry out the method of the present invention, and Figs. 1 to 6 show the states in which the valve body of the valve is rotated by 180°. show.

1 is a cylindrical cover with a bottom, and 2 is a cover plate 3 of the cover 1 so as to be parallel to the cover plate 2 on the inside of the cover plate 2 (downward in FIG. 1, hereinafter, the direction refers to the drawing).
This is a mounting plate for various parts that is fixed with bolts 4.

A single-phase gear motor 5 facing upward is fixed to the left side of the lower surface of the mounting plate 3, and a pinion 6 is fitted with a key 7 to the motor shaft passing through the mounting plate 3 so that they cannot rotate with each other. There is.

An output shaft 8 facing in the vertical direction and rotatably passing through the bottom plate of the cover 1 and the lid plate 2 is in contact with the top surface of the mounting plate 3 and meshes with a pinion 6, and has a drive shaft having a larger diameter than the pinion 6. Drive gear 9 as a plate
is pivotally installed, and the upper end of the output shaft 8 is connected to a valve shaft of a valve (not shown).

Between the cover plate 2 and the gear 9 on the output shaft 8, a disc-shaped driven plate 10 that is in close contact with the gear 9 is connected to the key 11.
It is fitted in such a way that it cannot rotate.

The opposing surfaces of the gear 9 and the driven plate 10 are cut into arcuate grooves 12a and 12b of the same shape and size, which are curved in an arc around the output shaft 8 and have a semicircular cross section in the radial direction.

Balls 13 as a restraining body are fitted into an arcuate hole with a circular cross section formed by both arcuate grooves 12a and 12b, and by changing the number of balls 13, the relative rotation between the gear 9 and the driven plate 10 can be controlled. The angle can be adjusted. In the cases shown in FIGS. 1 to 6, the number of balls 13 is one.

The diameter of the ball 13 is determined by the angle seen from the output shaft 8.
15°, and the arcuate groove 12
The length and width of a and 12b are determined so that 137 balls can fit together without loosening.

Below the mounting plate 3 on the output shaft 8, there are
A pair of circular switching plates 14a and 14b are fitted and fixed with screws 15 so that the mounting angle can be adjusted, and one protrusion 16a and 16b is provided on the circumferential surface of both switching plates 14a and 14b, respectively. It is being 1st
In the state shown in the figure and FIG. 2, each protrusion 16a, 1
6b are arranged at an angle of 180° from each other around the output shaft 8.

On the bottom surface of the mounting plate 3, each projection 16 is normally closed.
A pair of upper and lower micro switches 17a and 17b are provided which are opened by switches a and 16b.

Figure 3 shows the electrical circuit of this device.
Reference numeral 18 indicates a changeover switch for opening and closing the valve, which is provided at a suitable location.

Figure 4 shows both arcuate holes 1 during normal use of this device.
2a and 12b, both arcuate holes 12
This shows the relationship between a and 12b, and both arcuate holes 12
a and 12b are locked clockwise via a ball 13, and the gear 9 and driven plate 10 are rotated by the motor 5 in the direction of the arrow.

When the electric circuit is in the state shown in FIG. 3, the micro switch 17b is open, so the motor 5
is stopped, but when the changeover switch 18 is switched, the motor 5 is switched to the closed microswitch 1.
It is supplied with power through 7a and rotates. Therefore, it is linked to the motor 5 via the pinion 6. gear 9
rotates in the direction of the arrow in FIG. 5 together with the driven plate 10 which is engaged with the gear 9 via the ball 13. The output shaft 8 and the switching plate 14a are connected to the driven plate 1
However, when the output shaft 8 rotates 180 degrees and the protrusion 16a of the switching plate 14a opens the micro switch 17a, the motor 5 stops.

When the changeover switch 18 is switched again, the motor 5 rotates a further 180 degrees together with the output shaft 8 and then stops, as described above.

In this way, each time the selector switch 18 is switched, the output shaft 8 rotates 180 degrees, thereby opening and closing the valve coupled to the output shaft 8.

For example, if there is a power outage while the valve is open, and you want to close the valve immediately for maintenance of the equipment that uses the valve, you can engage a spanner at the lower end of the output shaft 8, or use a pre-installed handle. (not shown), etc., rotate the output shaft 8 accurately by 180 degrees until the rear end of the arcuate groove 12b of the driven plate 10 in the advancing direction contacts the ball 13, as shown in FIG. Can be closed. In addition,
At this time, since no rotational force is transmitted to the gear 9 and the motor 5, the operation can be performed extremely easily and quickly.

The rotational phase of the output shaft 8 and the valve body is as follows:
They can be matched by loosening the screw 15, rotating the switching plates 14a and 14b appropriately, and then fixing them.

When this device is used in a device that requires the valve body to be rotated 120 degrees, as shown in FIG.
Although not shown, three switching plates and three microswitches similar to those described above are provided, and one protrusion is provided on each switching plate 14a, 14b, separated by 120 degrees from each other, and in place of the switching switch 18. By using a three-stage selector switch and forming a circuit similar to that shown in FIG. 3, the output shaft 8 can be
In addition to opening and closing the valve by rotating it in 120° increments, it is possible to manually rotate only the output shaft 8 by exactly 120°.

In addition, as shown in FIG. 8, there are four balls 13, two switching plates and two microswitches, and four protrusions spaced apart by 90 degrees from each other are alternately provided on both switching plates. And by making the changeover switch a rotary 4-stage changeover type, the output shaft 8 can be
In addition to opening and closing the valve by rotating it by 90 degrees, manually rotate only the output shaft 8 by exactly 90 degrees.
For example, it can be used to open and close a kettle.

Figures 9 and 10 show other examples of electrical systems that can be used with this device, and both figures show the output shaft 8.
This shows the case where the image is rotated in 120° increments.

In FIG. 9, the switching plate 5 fitted to the output shaft 8
1, there are three protrusions 52a, 5 separated by 120 degrees.
2b and 52c are provided.

53 is normally closed, and the projections 52a, 52b, 52
This is a micro switch similar to the above, opened by c.

FIG. 10 shows an electric circuit, and 54 is
This is a normally open push-button switch located at the appropriate location to open and close the valve.

In this device, the motor 5 is stopped when the electric circuit is in the state shown in FIG. After that, the protrusion 52a is removed from the microswitch 53, and the microswitch 53 is closed.

Therefore, even if the push button switch 54 is released, the output shaft 8 continues to rotate, rotates 120 degrees, and stops when the next protrusion 52b opens the micro switch 53.

Similarly, by pressing the push button switch 54 for a short time, the output shaft 8 can be rotated by 120 degrees.

Similarly, by providing the switching plate 51 with two protrusions separated by 180 degrees, or by providing four protrusions separated by 90 degrees, the output shaft 8 can be controlled.
It can be rotated in 180° increments or 90° increments.

〔Effect of the invention〕

In the device as described above, the present invention adjusts the relative rotatable angle of the driven plate with respect to the driving plate by changing the number of restraining bodies fitted between both arcuate grooves 12a and 12b. This method provides a method for easily adjusting the manually operable range of the output shaft, and can be easily adjusted by simply changing the number of restraints without changing the design of the entire drive device. This drive device has the advantage that it can be used as a drive means for various driven devices having different manual operation ranges.

Furthermore, the present invention does not require any particularly complicated equipment; it can be carried out using a simple device that is almost the same as a conventional rotary drive device; it is less likely to break down; and the range that can be manually operated can be accurately determined. There are also other advantages.

In addition, in the above description, both arcuate grooves 12a, 12
b are made to have the same length, but there is no problem even if one length is shortened and the other length is lengthened by that amount.

Further, the length and width of both arcuate grooves 12a and 12b, the diameter and number of restraining bodies, or the rotation angle of the output shaft 8 each time are merely examples, and the types of valves etc. It may be determined as appropriate depending on requests and demands. For example, the restraining body may be cylindrical.

[Brief explanation of the drawing]

FIG. 1 is a central longitudinal sectional front view showing an example of a device used to carry out the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is an electric circuit diagram of this device. Fig. 4 is a sectional view taken along the line B-B in Fig. 1 showing the relationship between both arcuate grooves when the output shaft is rotated 180°, and Fig. 5 is a sectional view taken along the line B-B in Fig. 5 when the output shaft is automatically rotated 180°.
Fig. 6 is a cross-sectional view of the same part as Fig. 4 showing the relationship between both arcuate grooves, and Fig. 6 is a cross-sectional view of the same part as Fig.
Figure 7 is a cross-sectional view of the same part as Figure 4 showing the relationship between both arcuate grooves, and Figure 7 shows the relationship between the two arcuate grooves when the output shaft is rotated by 120 degrees.
A sectional view corresponding to FIG. 4 showing the relationship between both arcuate grooves,
Fig. 8 is a sectional view corresponding to Fig. 4 showing the relationship between both arcuate grooves when the output shaft is rotated 90 degrees, and Fig. 9 is a sectional view corresponding to Fig. 4.
The figure shows another example of the electrical system of this device.
The cross-sectional view corresponding to the figure, FIG.
FIG. 11 is a longitudinal sectional view showing an example of a conventional rotary drive device, and FIG. 12 is a schematic side view thereof. 1...Cover, 2...Lid plate, 3...Mounting plate, 4...Bolt, 5...Motor, 6...Pinion, 7...Key, 8...
Output shaft, 9...gear (drive plate), 10...driven plate, 1
DESCRIPTION OF SYMBOLS 1... Key, 12a, 12b... Arc-shaped groove, 13... Restriction body (ball), 14a, 14b... Switching plate, 15...
Screws, 16a, 16b...Protrusions, 17a, 17b...
Micro switch, 18...Changing switch, 51...
Switching plate, 52a, 52b, 52c...Protrusion, 53...
Micro switch, 54...Push button switch.

Claims (1)

[Scope of Claims] 1. An output shaft is connected to a movable body of a driven device, and the movable body is rotated by rotating the output shaft by either electric drive means or manual operation. In a rotary drive device,
A drive plate rotated by the electric drive means and a driven plate connected to the output shaft are disposed on the same axis, and each of the opposing end surfaces of the drive plate and the driven plate is provided with a drive plate rotated by the electric drive means, and a driven plate connected to the output shaft. A rotary type characterized in that a rotatable angle of the driven plate relative to the driving plate is adjusted by providing an arcuate groove and changing the number of restraining bodies fitted between the two arcuate grooves. A method for adjusting the manually operable range of a drive device. 2. A method for adjusting a manually operable range in a rotary drive device according to claim 1, wherein the restraining body is a ball. 3. A method for adjusting a manually operable range in a rotary drive device according to claim 1, wherein the restraint body has a cylindrical shape. 4. A method for adjusting a manually operable range in a rotary drive device according to any one of claims 1 to 3, wherein the lengths of both arcuate grooves are equal. 5. A method for adjusting a manually operable range in a rotary drive device according to any one of claims 1 to 3, wherein the arcuate grooves have different lengths.