JPS6152634B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electromagnetic device that uses electromagnetic force to give rotational motion at a constant angle, and which can be operated simply by turning on and off the excitation current, and which can obtain a large rotational angle with a small and compact structure. The purpose is to provide.

The structure of this invention will be explained below with reference to the embodiment shown in FIGS. 1 to 3. 1 is a cylindrical casing having a bottom and a lid at the top and bottom, respectively; 2 is a cylindrical casing that is rotatable coaxially with the center of the casing 1; , a rotating shaft penetrating and held by the casing 1, and 3 a branch-shaped shaft attached to the rotating shaft 2 so as to be able to rotate along the circumferential direction within an annular space with a rectangular cross section formed by the inner wall of the casing 1. This is a stopper member that is extended and fixed. This stop element 3 is formed as a stop coil 3' wound perpendicularly to the circumferential direction of the casing 1 or simply as a mechanical stop 3''. An arcuate shaft including a ferromagnetic part fixedly fixed to the stopper member 3 with one end thereof penetrated so as to be able to rotate along the circumference of the same center as the casing; 5 is capable of sliding on the arcuate shaft 4; 6 is a non-ferromagnetic material fixed to the casing 1 between the stopper member 3 and the fixed coil 5; The spacers 7, 7, . guided along the
One or more floating coils are each arranged in a column. These floating coils 7, 7, . 8, 8,...
is between the stopper member 3 and the idler coil 7, between each of the idler coils 7, 7, ..., and between the idler coil 7.
and the fixed coil 5, and has both ends fixed to the adjacent coils 5, 7, 7... or the stopper member 3, and is a non-stretchable compressible elastic body that does not stretch beyond a certain length, such as a compression spring. It is. The stopper coil 3', the floating coils 7, 7, . . . , and the fixed coil 5 are connected to electrical lines (not shown) in series or in parallel.
When energized, each coil 3', 7,
7, . . . , 5 form lines of magnetic force in the same circumferential direction of the casing 1. Further, an on/off switch (not shown) is inserted and connected to this electric line, and controls the rotation of the rotary shaft 2 by turning on and off the current.

Next, the operation of this device will be explained.

The first, which does not supply current through the electrical line
In the state shown in the figure, each coil 3', 7, 7,...
..., 5 do not form magnetic lines of force, each non-stretchable compression elastic body 8, 8, ... is stretched to its maximum length, and the stopper member 3, each floating coil 7, 7, ... and fixed coil 5 are Maintain maximum distance between each other. Here, excitation current is applied from the electric line to each coil 3', 7,
7,..., 5, each coil 3', 7,
7, . . . , 5 form lines of magnetic force in the same circumferential direction of the casing 1. Then, each coil exerts a force to draw the arcuate shaft 4 made of ferromagnetic material into its interior and to position it in the middle of the ferromagnetic material portion. In addition, the coils 3', 7, 7, ..., 5 through which the arcuate shaft 4 made of ferromagnetic material has penetrated are subjected to mutually attractive forces. In the initial state shown in FIG. 1, the stopper member 3 is Since the spacer 6 is interposed between a certain stopper coil 3' and the fixed coil 5, no adsorption action occurs between the stopper coil 3' and the fixed coil 5. Therefore, the exciting current is applied from the electric line to each coil 3',
7, 7, . Overcoming the repulsive force of the elastic body 7, the floating coils 7, 7, . . . are lined up one after another.
...is pulled into the casing and rotates freely around the casing. At this time, each coil 3', 7, 7,...
..., 5 are penetrated by the arcuate shaft 4, and the coils attract each other, so in the end, each coil 3',
7, 7, . . . , 5 contiguously gather near the fixed coil 5. The rotating shaft 2 is an arcuate shaft 4.
is given a rotational motion of a constant angle corresponding to the distance traveled. In addition, if the excitation current supplied from the electric line is cut off using an on-off switch, the attractive force acting between each coil 3', 7, 7, ..., 5 and the arcuate shaft 4 will be lost. With the elastic force of the non-stretchable compression elastic bodies 8, 8, . . . , each coil 3', 7, 7, .
Return to the original position shown in the figure.

Note that the above explanation is for the case where the stopper member 3 is a stopper coil 3' formed of a coil, and has the feature of increasing the suction force particularly at the final suction position and stabilizing the operation, but this is simply a mechanism. It goes without saying that a standard stopper of 3'' may also be used.

Further, the number of floating coils 7, 7, . . . can be set arbitrarily, and the stopper coils 3',
The winding layer thicknesses of the floating coils 7, 7, . . . , the fixed coil 5 and the lengths of the non-extensible compression elastic bodies 8, 8, . can be designed.

Further, the arcuate shaft 4 of the present invention can also be formed into a complete circle, as shown in FIG. In this figure, the same reference numerals as in FIG. 1 indicate the same parts. In this embodiment, the spacer 6' is connected to the arcuate shaft 4.
A through hole 6a is formed so as to be slidably inserted therethrough. The arcuate shaft 4 is formed by connecting a non-ferromagnetic portion 4'' with the same radius of curvature between the tip 9 of the ferromagnetic portion 4' and the end on the stopper member 3 side. In this case, since the non-ferromagnetic portion 4'' guides the floating coils 7, 7, . . . , it is also possible to simplify the structure of the casing 1. Also, the non-ferromagnetic portion 4'' does not generate any attractive force, so the operation in this embodiment is similar to that described in FIG.

As explained above, according to the present invention, since the floating coils are separated and arranged in vertical columns in an arc shape, a large rotation angle can be obtained, and control can be achieved only by turning on and off the current, resulting in a small and compact structure. becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing one embodiment of this invention;
The figure is a cross-sectional view taken along line A-A' in Figure 1, Figure 3 is a cross-sectional view taken along line B-B' in Figure 1, and Figure 4 is a cross-sectional view showing another embodiment of the present invention. be. DESCRIPTION OF SYMBOLS 1... Casing, 2... Rotating shaft, 3... Stopper member, 4... Arc-shaped shaft, 5... Fixed coil, 7... Floating coil, 8... Non-stretchable compression elastic body.

Claims (1)

[Claims] 1. A cylindrical casing, a rotary shaft rotatably penetrated through the center of the casing, and a movable stopper that extends radially outward from the rotary shaft and is rotatable within the casing. a member, an arcuate or annular shaft including a ferromagnetic part whose rear end or part is fixed to the stopper member and which is capable of rotating in a concentric circle with the casing within the casing; and a shaft which is slidable. a fixed coil that also serves as a fixed-side stopper member that is fixedly installed in the casing so as to pass through the shaft; and one or more floating coils that are arranged in a vertical line and that are slidably penetrated by the shaft and are located between the stopper member and the fixed coil. a coil, a non-stretchable compression elastic body which is located between the stopper member and the floating coil, between each of the floating coils, and between the floating coil and the fixed coil, and whose both ends are fixed to each adjacent coil or stopper member; A twisting machine characterized by comprising an electric line that supplies a current to a coil to form lines of magnetic force in the same circumferential direction and rotates a rotating shaft by turning on and off the current.