JPH0421424B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to an intermittent feed mechanism in a mechanism in which a magnet pin is moved in and out to engage and disengage members.

(Prior Art) In view of the fact that the general intermittent rotation mechanism itself is complicated and cannot be made compact, and also has problems with high-speed operation due to loud operation noise, the applicant has developed a method for controlling the operation of limit switches in electrical equipment. Alternatively, an application was previously filed for an intermittent rotation mechanism for adjusting the damping force of a shock absorber.

The structure of such an intermittent rotation mechanism is that a magnetic pin is slidably inserted into an intermediate rotating body that is rotated by a motor or the like, and a portion of one surface of the intermediate rotating body that faces the intermediate rotating body serves as a north pole. A magnet and a fixed body in which magnets serving as S poles are buried spaced apart in the circumferential direction are arranged one on top of the other, and a recess into which the magnet pin fits when protruding from the intermediate rotary body is formed on the other surface of the intermediate rotary body. The driven rotating bodies are arranged at intervals equal to the interval of , and as the intermediate rotating body rotates, the magnet pin of the fixed body attracts and repels the magnetic pin, and due to this attraction and repulsion,
The driven rotary body is made to rotate intermittently by causing a magnet pin to move in and out of a recessed portion of the driven rotary body to engage and disengage the intermediate rotary body and the driven rotary body.

(Problems with the prior art) The above mechanism attracts and repulses the magnetic pin inserted into the intermediate rotating body by a plurality of magnets embedded in the fixed body, so that the magnetic pin is caused to come out and disappear from the intermediate rotating body. However, the position where the magnetic pin is attracted and pulled out from the recessed portion of the driven rotating body must be a position where the magnetic pin coincides with the attraction magnet embedded in the fixed body. However, the attraction force of the attraction magnet that acts on the magnet pin acts when the magnet pin is close to the attraction magnet, and the magnet pin comes out of the recess of the driven rotor before the magnet pin and attraction magnet match. This disadvantage can be overcome by configuring the entire stationary body with magnets, but in such a configuration, the boundary between parts of the stationary body with different magnetic pole directions may It is difficult to distinguish, it is extremely troublesome to assemble, it cannot be assembled accurately, and it is disadvantageous in terms of cost.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a mechanism in which members are engaged and disengaged by the movement of a magnet pin. It is an object of the present invention to provide an intermittent feeding mechanism that can accurately determine the protruding and retracting positions of the magnet pins, is easy to assemble, and is advantageous in terms of cost.

(Structure of the Invention) In order to achieve the above-mentioned object, the present invention has a fixed member stacked on one side of a movable member and a driven member stacked on the other side,
A through hole is formed in the movable member that opens on both the surface facing the fixed member and the surface facing the driven member, and a magnet pin is slidably inserted into the through hole,
Further, a first magnet and a second magnet having different magnetic poles on the portion facing the movable member are buried in the fixed member at a distance, and the magnet pin is embedded in the surface of the driven member facing the movable member. A plurality of recesses into which the movable member is fitted when protruded are formed at intervals equal to the interval between the magnet parts, and the movable member is connected to the first magnet and the second magnet part.
An intermittent feeding mechanism that performs a feeding operation by reciprocating a range of magnets, and a portion located between the first magnet and the second magnet and close to either the first magnet or the second magnet. A third magnet is buried, and this third
The magnet is characterized in that the direction of the magnetic pole of the magnet is opposite to the direction of the magnetic pole of the adjacent magnet.

(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, reference numeral 1 denotes a case, and a drive shaft 3 of a motor 2 capable of forward and reverse rotation is inserted into the case 1, and a drive gear 4 is fitted onto the drive shaft 3. Further, a driven rotating body 5 having a rotating shaft 5a as a driven member is disposed within the case 1, and a driven gear 6 as a movable member is rotatably fitted onto the rotating shaft 5a of the driven rotating body 5. This driven gear 6 and the drive gear 4 are meshed with each other. Rotating shaft 5 protruding from driven gear 6
a is rotatably inserted into a fixing member 7 fixed to the case 1. Therefore, in the figure, the driven gear 6
A fixed member 7 is mounted on the upper surface, and a driven rotating body 5 is mounted on the lower surface.
are assembled so that they overlap.

The driven gear 6 is provided with a through hole 8 that is open on both the surface facing the fixed member 7 and the surface facing the driven rotating body 5, and a magnet shorter than the length of the through hole 8 is provided in the through hole 8. The pin 9 is slidably inserted.

The fixed member 7 has first magnets 10, 10, a second magnet 11, and a third magnet 1 spaced apart in the circumferential direction.
A total of 5 magnets, 2 and 12, are buried. The third magnets 12, 12 are brought close to the first magnets 10, 10. Further, the direction of the magnetic poles of these magnets is such that, for example, when the portion of the magnet pin 9 facing the fixing member 7 is set as the S pole, the first magnet 10,
10, the part facing the driven gear 6 is the N pole, and the second magnet 11 and the third magnet 12, 12
In this case, the portion facing the driven gear 6 is defined as the S pole.

Further, a plurality of recesses 13 are formed on the surface of the driven rotary body 5 facing the driven gear 6. The recesses 13 are sized to fit the magnet pins 9 and are provided in the circumferential direction of the driven rotating body 5.
... is the distance between the first magnets 10 embedded in the fixed member 7.
and the second magnet 11. An operating piece 14 is attached to the end of the rotating shaft 5a of the driven rotating body 5 that protrudes from the case 1. This operating piece 14 is a limit switch 15
For example, when the driven rotating body 5 is in the position shown in FIG. 1, the limit switch 15a is operated, and then,
As will be described later, the limit switch 15b is activated when the driven rotating body 5 rotates by a predetermined angle, and the limit switch 15c is activated when the driven rotating body 5 further rotates.

Next, the operation of the embodiment 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 second magnet 11, and the end of the magnet pin 9 fits into the recess 13 of the driven rotary body 5. From this state, when the motor 2 is rotated forward and the driven gear 6 is rotated in the direction of arrow a, the driven gear 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 14 to switch the limit switch 1.
5a and head towards the limit switch 15b. Furthermore, the motor 2 is set so that when the driven gear 6 rotates and the magnet pin 9 reaches the position of the first magnet 10, the motor 2 is stopped or reversed. Then, when the magnet pin 9 reaches the position of the magnet 10, the position shown in FIG.
The magnet pin 9 is attracted and comes out of the recess 13 as shown in FIG. If the motor 2 is reversed in this state, only the driven gear 6 will be reversed because the engagement between the driven gear 6 and the driven rotating body 5 has been released. Then, when the magnet pin 9 comes to the position of the second magnet 11 again, the magnet pin 9 is repelled by the second magnet 11 and fits into another recess 13 adjacent to the recess 13. At this point, the motor 2 is stopped or rotated forward. When the motor 2 is rotated in the normal direction again, the driven rotating body 5 is
rotates, and the operating piece 14 sets the limit switch 15c.
will be activated.

Here, in the vicinity of the first magnet 10, a third magnet 12 whose magnet direction is opposite to that of the first magnet 10 is buried. Therefore, the magnet pin 9 is connected to the first magnet 10.
It is always repelled by the second magnet 11 and the third magnet 12 until it coincides with the recess 13, and is urged in the direction of fitting into the recess 13. Therefore, the magnet pin 9 is not pulled out from the recess 13 until the magnet pin 8 is aligned with the first magnet 10.

In addition, in the above explanation of the operation, an example was shown in which the driven gear 6 was first rotated in the direction a from the reference position shown in FIG. Figure 1 and third magnet 1
0 and 12, the driven rotating body 5 is moved in the opposite direction to the above.
Can be rotated intermittently. Therefore, the first, second and third magnets 10, 1 which form the gist of the present invention
As shown in FIG. 4, the basic arrangement of numbers 1 and 12 can perform the desired operation if there is one each. However, as shown in FIG. 3, if two each of the first and third magnets 10 and 12 are provided, the driven gear 6
By appropriately combining the rotational directions of the two, it is possible, for example, to operate the limit switch 15a, then operate the limit switch 15b, and then operate the limit switch 15a again without operating the limit switch 15c.

Note that the above is an example of an embodiment of the present invention, and the magnet pin attraction/repulsion mechanism according to the present invention is not limited to the above.

For example, in the illustrated example, a driven gear is shown as a movable body, but the movable body is not limited to a driven gear, but may also be a rotating body provided with a pulley or an arm, and the movable body is not limited to a rotating body, but may be a reciprocating body such as a sliding member. It may be one that moves in a straight line.

In addition, when the movable body moves linearly and the magnet pin moves linearly and retracts from the movable body, the movable body can be engaged and disengaged from a member that intermittently moves linearly as a substitute for the driven rotating body. Furthermore, it is necessary to arrange the magnets linearly.

(Effects of the Invention) As explained above, according to the present invention, a fixed member is stacked on one side of a movable member, and a driven member is stacked on the other side, and the movable member has a side facing the fixed member and a side facing the driven member. A through hole is formed in both opposing surfaces, a magnet pin is slidably inserted into the through hole, and the fixed member includes a first magnet having a different magnetic pole in a portion facing the movable member; A second magnet is embedded at a distance, and a plurality of recesses into which the magnet pins are fitted when protruded are formed on the surface of the driven member facing the movable member at intervals equal to the intervals between the magnet parts. Then, a third magnet is buried between these first and second magnets at a position close to one of the magnets, and the direction of the magnetic pole of this third magnet is reversed to that of the magnetic pole of the adjacent magnet. As the movable member moves, the magnet attracts and repulses the magnetic pin, and this attracting and repelling position can be set accurately by the third magnet, so that when performing intermittent rotation operation, etc. Accurate operation can be achieved, positioning when assembling members can be easily performed, and it exhibits many effects such as being advantageous in terms of cost.

[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, and FIG.
Figures A to C are perspective views for explaining the operation of the same mechanism, and Figure 4 is a perspective view of another embodiment. In the drawings, 1 is a case, 5 is a driven member, 6 is a movable member, 7 is a fixed member, 9 is a magnet pin, 10 is a first magnet, 11 is a second magnet, and 12 is a third magnet. .

Claims (1)

[Claims] 1. A fixed member is stacked on one side of a movable member, and a driven member is stacked on the other side, and a through hole is formed in the movable member that opens on both the surface facing the fixed member and the surface facing the driven member. A magnet pin is slidably inserted into the through hole, and a first magnet and a second magnet having different magnetic poles at a portion facing the movable member are embedded in the fixed member at a distance, and A plurality of recesses into which the magnet pins are fitted when protruded are formed on the surface of the member facing the movable member at intervals equal to the intervals between the magnet parts, and the movable member is connected to the first magnet and the second magnet. It is an intermittent feeding mechanism that performs a feeding operation by reciprocating in a range of An intermittent feeding mechanism characterized in that a third magnet is embedded therein, and the direction of the magnetic pole of the third magnet is opposite to the direction of the magnetic pole of the adjacent magnet.