JPH0324929Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a mechanism for converting reciprocating linear motion of a solenoid or the like into intermittent rotational motion.

(Prior Art) A ratchet mechanism as shown in FIG. 10 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, and furthermore, a return spring must be provided for the pawls, which is extremely difficult to achieve. It is difficult to assemble into a limited space, and the manufacturing of the members that make up the mechanism is also troublesome. Further, the conventional mechanism generates a large amount of operating noise due to the engagement between gears and pawls, and cannot operate at high speed.

(Purpose of the invention) The present invention was developed in view of the above-mentioned conventional problems.The purpose of the invention is to significantly reduce the size of the device compared to the conventional one, to facilitate the manufacture of component parts, and to reduce operating noise. An object of the present invention is to provide an intermittent rotation mechanism that can reduce intermittent rotation.

(Structure of the invention) In order to achieve the above object, the present invention has an arm protruding in the circumferential direction of an intermediate rotating body abutted against the shaft of a driving member such as a solenoid that moves forward and backward, and A magnet pin is slidably inserted into the rotating body, and on one side of the intermediate rotating body, a magnet part whose part facing the intermediate rotating body is a N pole and a magnet part whose part is an S pole are provided either separately or adjacently. A driven rotary body having a concave portion into which the magnet pin is inserted is stacked on the other surface of the intermediate rotary body, and the intermediate rotary body is reciprocated by the operation of the driving member, and during this reciprocating rotation, 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 linear motion of the shaft of the driving member into intermittent rotational motion. It was configured to do this.

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

Figure 1 is a longitudinal cross-sectional view of the mechanism according to the present invention, Figure 2 is a side view in the A direction of Figure 1, Figure 3 is an exploded perspective view of the main components of the mechanism, and Figure 4 is the operation of the mechanism. FIG.

In the figure, 1 is a case, and a driven rotating body 2 having a rotating shaft 2a is disposed inside the case 1, and an intermediate rotating body 3 is rotatably inserted into the rotating shaft 2a of the driven rotating body 2. There is. A part of the intermediate rotating body 3 is integrally provided with an arm part 4 that projects outward from the case 1, and a through hole 5 is formed in a part of the intermediate rotating body 3 in the thickness direction. A magnet pin 6 shorter than the length of the through hole 5 is slidably inserted into the through hole 5.

Also, a rotating shaft 2a protruding downward from the case 1
An operating piece 7 is attached to the end of the switch, and the operating piece 7 selectively operates the limit switches 8a, 8b, and 8c.

Further, a fixed body 10 fixed to the case 1 with screws 9 is disposed on the upper surface of the intermediate rotating body 3, and the upper end of the rotating shaft 2a is rotatably inserted into the fixed body 10. As shown in FIG. 3, the fixed body 10 has three magnets 11, 12, 1 spaced apart in the circumferential direction.
3 is buried so that the magnets 11 and 13 have the same magnetic pole direction, and the magnet 12 has the magnetic pole direction opposite to that of the magnets 11 and 13. For example, when the part of the magnet pin 6 facing the fixed body 10 is set as the N pole, the magnets 11 and 13
Regarding, the part facing the intermediate rotating body 3 is the S pole,
Regarding the magnet 12, the portion facing the intermediate rotating body 3 is set as the north pole.

Further, a plurality of recesses 14 are formed on the surface of the driven rotary body 2 facing the intermediate rotary body 3. This recess 14 is sized to fit the magnet pin 6,
Further, each recess 1 is provided in the circumferential direction of the driven rotating body 2.
4... is the distance between the magnets 11 and 1 embedded in the fixed body 10.
2 or the spacing between the magnets 12 and 13.

On the other hand, a push-pull solenoid 15 or a cylinder unit, which is a driving member, is arranged outside the case 1. This push pull solenoid 15
is equipped with a shaft portion 16 that moves linearly forward and backward;
A tapered portion 17 is formed at the tip of this shaft portion 16,
This tapered portion 17 is brought into contact with a tapered portion 18 formed at the tip of the arm 4. When the shaft 16 is lowered by the operation of the solenoid 15, the arm 4 rotates by a predetermined angle in the direction a in FIG. 2, and when the shaft 16 is retracted and moved upward, the spring 19 ( The arm 4 returns to its original position due to the tensile force (see Fig. 3). The intermediate rotating body 3 reciprocates integrally with this arm 4.

Next, the operation of the mechanism according to the present invention will be explained based on FIGS. 4A to 4C.

First, assume that the state shown in FIG. 4A is the reference position. In this state, the magnet pin 6 is repelled by the magnet 12, and the end of the magnet pin 6 fits into the recess 14 of the driven rotary body 2. From this state, when the solenoid 15 is actuated to rotate the intermediate rotating body 3 in the direction of arrow a, the intermediate rotating body 3 and the driven rotating body 2 are engaged with each other via the magnet pin 6, as shown in FIG. 4B. Therefore, the driven rotating body 2 also rotates integrally. This rotation causes the operating piece 7 to move away from the limit switch 8a and toward the limit switch 8b. Furthermore, when the intermediate rotating body 3 reaches the position of the magnet 13, the magnet pin 6 is attracted and comes out of the recess 14, as shown in FIG. 4C. If the solenoid is retracted in this state, only the intermediate rotating body 3 will reverse in the direction b since the engagement between the intermediate rotating body 3 and the driven rotating body 2 has been released. Then, when the magnet pin 6 comes to the position of the magnet 12 again,
The magnet pin 6 is repelled by the magnet 12 and fits into another recess 14 adjacent to the recess 14 .
When the solenoid 15 is operated again, the driven rotating body 2 rotates by the same action as described above, and the operating piece 7 operates the limit switch 8c.

In addition, in the above operation explanation, the magnets 12 and 13
In between, the magnet pin 6 of the intermediate rotating body 3 attracts and
Although we have shown an example of repulsion, the shaft 1 of the solenoid 15
It is also possible to rotate the intermediate rotating body 3 in the direction C from the reference position shown in FIG. 4A by reversing the direction of contact between the intermediate rotating body 6 and the arm 4, or by arranging another solenoid. In this case, magnet 11
has the same effect as the magnet 13, and the operating piece 7 separates from the limit switch 8a and moves to the limit switch 8c.
, and then from limit switch 8c to 8b.

Furthermore, the mechanism according to the present invention can be applied not only to actuating a predetermined limit switch in electrical equipment, but also to all kinds of uses, an example of which is shown in FIG. FIG. 5 shows an example in which the damping force adjustment of a shock absorber is applied. In this shock absorber, a hollow rod 22 having a piston 21 fixed thereon is slidably fitted into a cylinder 20, and the driven rotor is inserted into the hollow rod 22. Insert the rotating shaft 2a extending from the body, and
The damping force is adjusted by aligning the orifice holes 23a of the plate body 23, which has a plurality of orifice holes 23a formed at the lower end thereof, with the oil holes 24. Here, the orifice hole 23a corresponds to the operating piece 7 described in the first to third embodiments.

6 to 9 are diagrams showing other examples of the fixed body, and in the example shown in FIG. 6, two magnets 25 and 26 with different magnetic pole directions are embedded in the fixed body 10. . When using the fixed body 10 having such a structure,
The driven rotating body 2 rotates intermittently only in a fixed direction.

In addition, in the example shown in FIG. 7, a plurality of magnets 27 are embedded at equal intervals in the circumferential direction of the fixed body 10, and with this structure, the continuous rotation of the intermediate rotary body 3 is converted into driven rotation. This can be converted into a continuous intermittent rotation of the body 2. However, in this case, it is necessary to arrange a plurality of drive members such as solenoids to enable continuous rotation of the intermediate rotating body 3.

Furthermore, FIG. 8 shows an example in which the fixed body 10 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. 9, magnets 30, 30, 31, 31,
32 are buried. Here, the magnets 30, 30 have the same magnetic pole direction, and the magnets 31, 31, 32 have magnetic poles in the opposite direction to the magnet 30. For example, when the portion of the magnet pin 6 facing the fixed body 10 is set as the south pole, the portion of the magnet 30 facing the intermediate rotating body 3 is set as the south pole. Further, the spacing between the recesses 14 and 14 and the spacing between the magnets 30 and 32 are made equal, and the magnet 30
and magnet 31 are buried close to each other.

With such a configuration, the attraction effect of the magnet 3 will be exerted only when the magnet 30 and the magnet pin 6 are in the same position. Therefore, when the intermediate rotating body 3 and the driven rotating body 2 are engaged and rotated together, the magnet 6 is attracted by the magnet 30 and does not come off from the recess 14. Therefore, the engagement/disengagement position between the intermediate rotating body 3 and the driven rotating body 2 can be determined accurately.

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

(Effects of the invention) As explained above, according to the invention, a fixed body is placed on one side of an intermediate rotating body rotated by a solenoid or the like, and a driven rotating body is overlapped on the other side, and a magnet pin provided on the intermediate rotating body is placed on one side of the intermediate rotating body. By attracting or repelling the magnetic part 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, so that the driven rotating body can be moved as desired. Because it can only rotate by an angle, it can be significantly smaller than conventional intermittent rotation mechanisms, and the noise associated with operation can be reduced, and the mechanism itself is easy to assemble and can operate at high speeds. It has many effects such as obtaining.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of the mechanism according to the present invention, Fig. 2 is a side view in the direction A of Fig. 1, Fig. 3 is an exploded perspective view of the main components constituting the mechanism according to the present invention, and Fig. 4 A
C to C are perspective views illustrating the operation of the mechanism according to the present invention, FIG. 5 is a longitudinal cross-sectional view showing a changed part of the operating section, and FIGS. 6 to 9 are perspective views showing modified examples of the fixed body.
FIG. 10 is a diagram showing a conventional intermittent rotation mechanism. In the drawings, 1 is a case, 2 is a driven rotating body, 3 is an intermediate rotating body, 4 is an arm, 5 is a through hole, 6 is a magnet pin, 10 is a fixed body, 11, 12, 13, 25,
26, 27, 28, 29, 30, 31, and 32 are magnet parts, 15 is a driving member, and 16 is a shaft part.

Claims (1)

[Scope of utility model registration request] A driving member, such as a solenoid or a cylinder unit, whose shaft portion moves forward and backward, and a part of the arm that protrudes outward in the circumferential direction engages with the shaft portion of the driving member and rotates back and forth within a predetermined angle range as the shaft portion moves back and forth. a movable intermediate rotating body; a magnet pin slidably inserted into a through hole formed in the thickness direction of the intermediate rotating body; and a portion provided overlappingly on one surface of the intermediate rotating body and facing the intermediate rotating body. A fixed body in which a magnet portion serving as a north pole and a magnet portion serving as an south pole are provided spaced apart or adjacent to each other in the circumferential direction, and a magnet provided overlappingly on the other surface of the intermediate rotating body and inserted into the intermediate rotating body. An intermittent rotation mechanism characterized by comprising a driven rotary body having a plurality of recesses into which pins are inserted in a circumferential direction at intervals equal to the intervals between the magnet parts.