JPH0333941B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a mechanism for converting rotational motion of a rotary solenoid or motor into intermittent rotational motion.

(Prior Art) A ratchet mechanism as shown in FIG. 11 is known as a mechanism for periodically rotating a gear or the like in a fixed direction. This ratchet mechanism meshes a drive pawl 101 and a restriction pawl 102 with a gear 100, so that one rotation of the drive pawl 101 causes the gear 100 to rotate one frame, and the restriction pawl 102 prevents the gear 100 from rotating back. The regulating pawl 102 is urged in the direction of the gear 100 by a spring 103.

Furthermore, not only the above-mentioned ratchet mechanism but also generally applied intermittent rotation mechanisms combine gears and pawls.

(Problems with the prior art) Since the conventional intermittent rotation mechanism described above combines gears and pawls, there is a limit to how small the mechanism itself can be made. Furthermore, return springs must be provided for the pawls, etc., making it extremely difficult to rotate. It is difficult to assemble into a limited space, and the manufacturing of the members that make up the mechanism is also troublesome. Furthermore, the conventional mechanism generates a large amount of operating noise due to the engagement between gears and pawls, and cannot operate at high speed.

(Object of the Invention) The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to achieve a device that can be significantly smaller than the conventional one, has easy manufacturing of component parts, and is suitable for high-speed operation. An object of the present invention is to provide an intermittent rotation mechanism that can also reduce operating noise.

(Structure of the Invention) In order to achieve the above object, the present invention engages a part of an intermediate rotating body with a shaft portion of a driving member whose shaft portion rotates, such as a rotary solenoid or a motor,
A magnet pin is slidably inserted into this intermediate rotating body, and on one side of the intermediate rotating body, a magnet part whose part facing the intermediate rotating body is the N pole and a magnet part which is the S pole are separated or adjacent to each other. The intermediate rotary body is overlapped with a fixed body provided thereon, and a driven rotary body having a concave portion into which the magnet pin is fitted is stacked on the other surface of the intermediate rotary body, and the intermediate rotary body is rotated by the operation of the driving member. The magnet pin of the intermediate rotating body is attracted and repelled by the magnet part of the stationary body, and this attraction and repulsion causes the magnetic pin to engage and disengage from the recess of the driven rotary body, converting the rotational movement of the shaft part of the driving member into intermittent rotational movement. It was configured to do this.

(Example) Examples of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of a mechanism according to the present invention, FIG. 2 is an exploded perspective view of the main components of the mechanism, and FIG. 3 is a perspective view showing the operation of the mechanism.

In the figure, 1 is a cylinder, and an angled support plate 2 is screwed onto the upper end of this cylinder 1.
A case 4 is fixed to one end of the case through a screw 3,
Inside the case 4 is a driven rotating body 5 having a rotating shaft 5a.
An intermediate rotating body 6 is rotatably inserted into the rotating shaft 5a of the driven rotating body 5. A part of the intermediate rotating body 6 is integrally provided with an arm portion 7 that projects outward from a notch formed in the case 4, and a through hole 8 is bored in the thickness direction in a part of the intermediate rotating body 6. A magnet pin 9 shorter than the length of the through hole 8 is slidably inserted into the through hole 8.

Further, a rod 10 is engaged with the end of the rotating shaft 5a protruding into the cylinder 1 from the case 4, and an operating piece 11 is provided at the lower end of the rod 10, and the operating piece 11 operates the limit switch 12a, 12b, 12
c is selectively activated.

Furthermore, a fixed body 14 fixed to the case 4 with screws 13 is disposed on the upper surface of the intermediate rotating body 6, and the upper end of the rotating shaft 5a is rotatably inserted into the fixed body 14. As shown in FIG. 2, the fixed body 14 has three magnets 15, 16, spaced apart in the circumferential direction.
17 is buried so that the magnets 15 and 17 have the same magnetic pole direction, and the magnet 16 has the magnetic pole direction opposite to the magnets 15 and 17. For example, when the part of the magnet pin 9 facing the fixed body 14 is set as the N pole, the magnets 15, 1
For 7, the part facing the intermediate rotating body is the S pole,
Regarding the magnet 16, the portion facing the intermediate rotating body 6 is set as the north pole.

Further, a plurality of recesses 18 are formed on the surface of the driven rotary body 5 facing the intermediate rotary body 6. This recess 18 is sized to fit the magnet pin 9,
Further, each recess 1 is provided in the circumferential direction of the driven rotating body 5.
8... is the distance between the magnets 15 and 1 embedded in the fixed body 14.
6 or the spacing between the magnets 16 and 17.

On the other hand, a rotary solenoid 19 or a motor, which is a driving member located above the case 4, is fixed to the support plate 2. The rotary solenoid 19 includes a bent shaft portion 20 that rotates back and forth around the case 4 within a predetermined angle range.
The distal end portion is a bifurcated portion, and this bifurcated portion engages with the arm 7. When the shaft section 20 rotates in the normal direction due to the operation of the rotary solenoid 19, the arm 7 also rotates by a predetermined angle, and when the shaft section 20 rotates in the reverse direction, the arm 7 returns to its original position. The intermediate rotating body 6 reciprocates integrally with this arm 7.

Next, the operation of the mechanism according to the present invention will be explained based on FIGS. 3A to 3C.

First, assume that the state shown in FIG. 3A is the reference position. In this state, the magnet pin 9 is repelled by the magnet 16, and the end of the magnet pin 9 fits into the recess 18 of the driven rotating body 5. From this state, when the rotary solenoid 19 is operated to rotate the intermediate rotating body 6 in the direction of arrow a, the intermediate rotating body 6 and the driven rotating body 5 are engaged with each other via the magnet pin 9, as shown in FIG. 3B. Therefore, the driven rotating body 5 also rotates integrally. This rotation causes the operating piece 11 to move away from the limit switch 12a and toward the limit switch 12b. Further, when the intermediate rotating body 6 rotates and the magnet pin 9 comes to the position of the magnet 17, the position shown in FIG.
The magnet pin 9 is attracted and comes out of the recess 18 as shown in FIG. If the rotary solenoid is returned to operation in this state, only the intermediate rotary body 6 is reversed in the b direction since the engagement between the intermediate rotary body 6 and the driven rotary body 5 has been released. When the magnet pin 9 comes to the position of the magnet 16 again, the magnet pin 9 is repelled by the magnet 16 and fits into another recess 18 adjacent to the recess 18. When the rotary solenoid 19 is operated again, the driven rotary body 5 rotates in the same manner as described above, and the operating piece 11 operates the limit switch 12c.

In addition, in the above operation explanation, the magnets 16 and 17
In between, the magnet pin 9 of the intermediate rotating body 6 attracts and
An example of repulsion was shown, but rotary solenoid 1
It is also possible to rotate the intermediate rotating body 6 in the direction C from the reference position shown in FIG. 3A by means such as reversing the normal rotation direction of the shaft 20 of FIG. In this case, the magnet 15 has the same effect as the magnet 17, and the operation piece 1
1 moves away from the limit switch 12a and faces the limit switch 12c, and further moves towards the limit switch 12.
Head to 12b from c.

4 and 5 show another embodiment of the engagement structure between the drive member and the intermediate rotating body 6, and here a motor 21 capable of forward and reverse rotation is shown as the drive member.

That is, in the embodiment shown in FIG.
A motor 21 of a size that fits within the width of the case 4 is disposed above, and a shaft 6a extending from the center of the intermediate rotating body 6 penetrates the fixed body 14 and projects upward. The structure shown in FIG. 5 is one in which a speed reduction mechanism 23 is arranged between the shaft 22 of the motor 21 and the shaft 6a of the intermediate rotating body 6. The size of the case 4 is also made to fit within the width of the case 4. In this way, by arranging the rotary solenoid or the motor above or below the case 4 and having a size that fits within the width of the case 4, space can be used effectively and further compactness can be achieved.

Further, the mechanism according to the present invention can be applied not only to actuating a predetermined limit switch of an electric device, but also to a variety of other uses, an example of which is shown in FIG. FIG. 6 shows an example in which the damping force adjustment of a shock absorber is applied. In this shock absorber, a hollow rod 26 with a piston 25 fixed to the cylinder 24 is fitted in a slidable manner, and the driven rotation is inserted into the hollow rod 26. Insert the rotating shaft 5a extending from the body, and
The damping force is adjusted by aligning the orifice holes 27a of the plate body 27, which has a plurality of orifice holes 27a formed at the lower end thereof, with the oil holes 28. Here, the orifice hole 27a corresponds to the operating piece 11 described in the embodiment.

7 to 10 are diagrams showing other examples of the fixed body, and in the example shown in FIG. 7, two magnets 29 and 30 with different magnetic pole directions are embedded in the fixed body 14. . When the fixed body 14 having such a structure is used, the driven rotary body 5 rotates intermittently only in a fixed direction.

In addition, in the example shown in FIG. 8, a plurality of magnets 31 are buried at equal intervals in the circumferential direction of the fixed body 14, and with this structure, the continuous rotation of the intermediate rotary body 6 is converted into driven rotation. A continuous intermittent rotation of the body 5 may be substituted.

Further, FIG. 9 shows an example in which the fixed body 14 itself is composed of a permanent magnet. With this configuration, the same effect as when three magnets are buried is achieved. However, for positioning during assembly, it is more advantageous to embed the magnet.

Furthermore, in the example shown in FIG.
The magnets 34, 34, 35, 3 are spaced apart in the circumferential direction.
5,36 are buried. Here magnets 34, 34
The direction of the magnetic poles is the same, and the magnets 35, 35, 36
has a magnetic pole in the opposite direction to that of the magnet 34. For example, when the portion of the magnet pin 9 facing the fixed body 14 is set as the south pole, the portion of the magnet 34 facing the intermediate rotating body 6 is set as the north pole. Further, the spacing between the recesses 18 and 18 and the spacing between the magnets 34 and 36 are made equal, and the magnets 34 and 35 are buried close to each other.

With such a configuration, the attraction effect of the magnet 34 will be exerted only when the magnet 34 and the magnet pin 9 are in the same position. Therefore, in a state where the intermediate rotating body 6 and the driven rotating body 5 are engaged and rotating integrally, the magnet pin 9 is attached to the magnet 3.
4 and will not come off from the recess 18. Therefore, the engagement/disengagement position between the intermediate rotating body 6 and the driven rotating body 5 can be determined accurately.

In addition, in the present invention, since the frequency of collision between the magnet and the magnet pin is high, it is also possible to coat at least one of the magnet or the magnet pin with aluminum foil or a resin film in order to extend the life of these components. good.

(Effects of the Invention) As explained above, according to the present invention, a fixed body is superimposed on one side of an intermediate rotating body rotated by a rotary solenoid or a motor, and a driven rotating body is superposed on the other side, and a magnet provided on the intermediate rotating body is superimposed on one side of the intermediate rotating body. By attracting or repelling the pin with a magnet provided on the fixed body, the intermediate rotating body and the driven rotating body are engaged and disengaged, and the rotational motion of the intermediate rotating body is intermittently transmitted to the driven rotating body, and the driven rotating body The mechanism can be rotated by a desired angle, making it significantly more compact than conventional intermittent rotation mechanisms, and reducing the noise associated with operation.Furthermore, the mechanism itself is easy to assemble, and high-speed operation is ensured. It has many effects such as:

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of the mechanism according to the present invention, Fig. 2 is an exploded perspective view of the main components constituting the mechanism according to the present invention, and Figs. 3 A to C explain the operation of the mechanism according to the present invention. A perspective view, FIGS. 4 and 5 are cross-sectional views showing another embodiment of the engagement structure between the drive member and the intermediate rotating body, FIG. 6 is a vertical cross-sectional view showing a changed part of the operating section, and FIGS. FIG. 10 is a perspective view showing a modification of the fixed body, and FIG. 11 is a diagram showing a conventional intermittent rotation mechanism. In the drawings, 1 is a cylinder, 4 is a case, 5 is a driven rotating body, 6 is an intermediate rotating body, 8 is a through hole, 9 is a magnet pin, 14 is a fixed body, 15, 16, 17, 29,
30, 31, 32, 33, 34, 35, and 36 are magnet parts, 19 and 21 are drive members, and 20 and 22 are shaft parts.

Claims (1)

[Claims] 1. A drive member such as a rotary solenoid or a motor whose shaft portion rotates; an intermediate rotating body that partially engages with the shaft portion of the driving member and rotates in response to the rotational movement of the shaft portion; A magnet pin that is slidably inserted into a through hole formed in the thickness direction, a magnet portion that is provided overlappingly on one surface of the intermediate rotating body, and whose portion facing the intermediate rotating body is a north pole, and a south pole. A fixed body in which the magnet parts are provided spaced apart or adjacent to each other in the circumferential direction, and a plurality of recesses in the magnet part, which are provided overlappingly on the other surface of the intermediate rotary body and into which magnet pins inserted into the intermediate rotary body are fitted, are provided. An intermittent rotation mechanism characterized by comprising a driven rotating body provided in a weekly direction at intervals equal to the interval.