JPH0333942B2 - - 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 slide member into intermittent feeding motion.

(Prior Art) A mechanism that has been considered in the past as a mechanism for intermittently moving an operating rod, etc. in a fixed direction and operating a predetermined limit switch, etc. incorporates a ratchet mechanism inside to easily and easily control the intermittent rotational movement of gears. A device that converts linear motion through a pinion and transmits it to the operating rod, making it easy to rotate a pulse motor.
There are various mechanisms, such as those that convert the motion into linear motion via a pinion, and those that control the amount of protrusion of the rod of the cylinder unit in stages.

(Problems with the prior art) All of the conventional intermittent feeding mechanisms described above have a limit to how small the mechanism itself can be, making it difficult to incorporate it into an extremely limited space, and manufacturing the members that make up the mechanism is troublesome. be. Furthermore, conventional mechanisms are difficult to operate at high speeds and are disadvantageous in terms of cost.

(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 feeding mechanism that can also reduce operating noise.

(Structure of the Invention) In order to achieve the above object, the present invention has a magnetic pin slidably inserted into a through hole of a slide member that is capable of reciprocating with respect to a case, and a magnet pin is slidably inserted into a through hole of a slide member that is capable of reciprocating with respect to a case. A fixed body in which a magnet whose part is the N pole and a magnet part which is the S pole are arranged spaced apart or adjacent to each other along the moving direction of the slide member are stacked in a case, and the magnet pin is placed on the other surface of the slide member. The operation body, which has a recess into which the slide member is fitted, is stacked in the case along the direction of movement of the slide member, and when the slide member moves back and forth, the magnetic pin of the fixed body attracts and repels the magnetic pin, and this attraction and repulsion The structure is configured such that the magnet pin and the recessed portion of the operating body are engaged and disengaged, thereby converting the movement into intermittent feeding motion.

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

FIG. 1 is a longitudinal sectional view of the mechanism according to the present invention, FIG. 2 is an enlarged sectional view of the main part of the same mechanism, and FIG. 3 is A of FIG. 1.
-A cross-sectional view.

1 in the figure is a cylindrical body, and an operating body 2 is slidably inserted into this cylindrical body 1. An operating piece 3 is attached to a part of this operating body 2, and the operating body 2 is arranged vertically in the figure. By moving the operating piece 3, the limit switch 4a,
4b and 4c are sequentially and selectively activated.

On the other hand, a case 5 is fixed to the upper end of the cylinder 1,
A slide member 6, a fixed body 7, and an upper part 2a of the operating body 2 are housed in the case 5. The slide member 6 has a rod 6a protruding from the upper end of the case 5,
This rod 6a is connected to a drive source (not shown), and this drive source causes the slide member 6 to linearly reciprocate in the vertical direction in the figure within the case 5. Further, springs 8, 8 are compressed between the slide member 6 and the upper and lower ends of the case 5.
When no force is applied to the slide member 6, the slide member 6 is maintained at the neutral position. Furthermore, a through hole 9 is bored in the slide member 6 in the thickness direction, and a magnet pin 10 is slidably inserted into this through hole 9.

Further, a fixed body 7 disposed on one side of the slide member 6 has three parts along the moving direction of the slide member 6.
magnets 11, 12, 13 are buried.
For 3, make sure that the magnetic poles are in the same direction,
The direction of the magnetic pole of the magnet 12 is opposite to that of the magnets 11 and 13. For example, magnet pin 1
When the part facing the fixed body 7 of the magnet 11 and 13 is set as the north pole as shown in FIG.
In this case, the portion facing the slide member 6 is set as the north pole.

Further, a plurality of recesses 14 are formed along the moving direction of the slide member 6 on the surface of the operating body upper part 2a disposed on the other surface side of the slide member 6, which faces the slide member 6. These recesses 14...
. . are sized to fit the magnet pins 10, and the spacing between the recesses 14 is equal to the spacing between the magnets 11, 12 and the magnets 12, 13.

The operation of the intermittent feed mechanism configured as described above will be explained below.

Here, it is assumed that the reference position is a position where the slide member 6 is in a neutral position and the magnet pin 10 is aligned with the magnet 12 of the fixed body 7. In this state, the magnet pin 10 is repelled by the magnet 12 and is fitted into the recess 14 in the upper part 2a of the operating body.

When the slide member 6 is moved from this state, for example, in the direction a in FIG. Piece 3 moves away from limit switch 4a and toward limit switch 4b.

Since the magnet pin 10 is set to align with the magnet 11 when the slide member 6 reaches its travel limit, the magnet pin 10 is attracted by the magnet 11 when the slide member 6 reaches its travel limit. , the slide member 6 and the operating body 2 are pulled out from the recess 14.
The engagement with is released. When the driving force acting on the slide member 6 is released, the slide member 6 returns to the reference position due to the elastic force of the spring 8. At this position, it is repulsed again by the magnet pin 12 and fitted into the recess 14.

By repeating this operation, the operating piece 3 separates from the limit switch 4b and moves to the limit switch 4c.
heading to

Further, when the slide member 6 is moved in the direction b from the reference position, since the slide member 6 and the operating body 2 are engaged with each other via the magnetic pin 10, the operating body 2 and the operating body 2 are integrated as shown in the figure. The operating piece 3 is moved upward and upward, and the operating piece 3 is sequentially operated in the opposite direction from the limit switch 4c to the limit switch 4a. In addition, by appropriately combining the moving directions a and b of the slide member 6, for example, the limit switches 4a, 4b, 4
It is also possible to operate in the order of c.

In the illustrated example, the number of magnets and the number of recesses are three each, but the number is arbitrary.

Further, FIG. 4 shows an example in which the fixed body 7 itself is composed of a permanent magnet.
5 and 16, and 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, the mechanism according to the present invention can be applied not only to actuating a limit switch but also to various other uses, an example of which is shown in FIG. Fifth
The figure shows an example in which damping force adjustment is applied to a shock absorber. This shock absorber has an inner cylinder 18 disposed within an outer cylinder 17, and the operating body 2 is inserted into the inner cylinder 18. Oil hole 1 at the bottom end
By fixing the member 20 formed with 9 and moving the operating body 2 up and down, the oil hole 19 is aligned with a predetermined orifice hole 21 bored in the inner cylinder 18, thereby adjusting the damping force. Here, oil hole 1
9 corresponds to the operation piece 3.

In addition, in 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 components, it is possible to coat at least one of the magnet or the magnet pin with aluminum foil or a resin film. good. Alternatively, a magnet having the same orientation as the magnet 12 may be embedded in a position close to the magnets 11 and 13 to accurately determine the engagement/disengagement position between the slide member and the operating body.

(Effects of the Invention) As explained above, according to the present invention, a fixed body is stacked on one side of a slidable slide member and an operating body is stacked on the other side, and a magnet pin provided on the slide member is attached to a magnet provided on the fixed body. The slide member and the operating body are engaged and disengaged by suction or repulsion at the part, and the linear motion of the slide member is intermittently transmitted to the operating body, so that the operating body can be moved by a desired amount. Compared to an intermittent feed mechanism, this mechanism has many advantages, such as being significantly smaller in size, reducing noise associated with operation, being easier to assemble the mechanism itself, and being able to operate reliably at high speed.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of the mechanism according to the present invention, FIG. 2 is an enlarged sectional view of the main part of the same mechanism, and FIG. 3 is A of FIG. 1.
- A sectional view, FIG. 4 is a perspective view showing another embodiment of the fixed body, and FIG. 5 is a sectional view showing another embodiment of the operating section. In the drawings, 1 is a cylinder, 2 is an operating body, 5 is a case, 6 is a slide member, 7 is a fixed body, 9 is a through hole, 10 is a magnet pin, 11, 12, 13, 15,
16 is a magnet.

Claims (1)

[Claims] 1 A slide member that makes reciprocating linear motion with respect to the case, a magnet pin that is slidably inserted into a through hole formed in the slide member, and a magnet pin that is fixed in the case so as to overlap one surface of the slide member and that is attached to the slide member. a fixed body in which a magnet portion whose opposing portions are N poles and a magnet portion whose opposing portions are S poles are provided spaced apart or adjacent to each other along the moving direction of the slide member;
An operating body that is provided in the case so as to overlap the other surface of the slide member, and has a plurality of recesses into which magnet pins inserted into the slide member fit, and are provided along the moving direction of the slide member at intervals equal to the spacing between the magnet parts. An intermittent feed mechanism characterized by comprising: