JPS5933519B2 - holding device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a holding device for holding a magnetic material.

The purpose of this is not only to have a smooth holding surface, but also to
To construct a holding device that can easily hold even objects with considerable unevenness. That is, in the present invention, a plurality of rods made of magnetic material are provided. These plurality of rods are held by a holder so that they are kept parallel and can be moved in the longitudinal direction. The rods may be arranged in one row or in multiple rows. An electromagnetic coil is provided which magnetizes some of the rods, preferably half, in one direction. An electromagnetic coil is also provided to magnetize the remaining rods in different directions. It is desirable to provide these two types of electromagnetic coils alternately. Approximately half of the rods may be allowed to act simply as magnetic paths without directly applying magnetizing force. These are located on the opposite side of the rod from where the electromagnetic coil is located to where the end of the rod that acts on the object is located, and the rods that are magnetized in different directions are commonly used. A yoke is provided which clamps the rod and restricts movement of the rod relative to the holder by biasing the electromagnetic coil. This yoke should not be construed narrowly as restricting two rods, one each magnetized in different directions. Several rods magnetized in different directions may be sandwiched by a common yoke. By doing as described above, when the electromagnetic coil is not energized, each rod moves relative to the holder with respect to the uneven state of the holding surface of the object to be held.

When the electromagnetic coil is excited, the magnetic flux from the electromagnetic coil passes through the rod, the holding object, other rods, and the yoke. The yoke then pinches the rod from both sides and restricts movement relative to the holder. FIG. 1 and FIG. 2 are diagrams showing an embodiment of the holding device of the present invention.

This example will be explained below.

A plurality of rods R1 to R16 made of magnetic material are provided.

A holder 1 that holds these rods R1 to R16 so that they can be moved in the longitudinal direction of the rods while keeping them parallel.
will be established. The donut-shaped electromagnetic coil Cl is connected to the rod R4,
R3, R5, R7, R9? Rll? Rl3l and Rl5
(hereinafter, these 0 rods will be expressed as R2n+1), and these rods R2n+1 can be magnetized in the cross direction. Also, the donut-shaped electromagnetic coil C2 is rod R29R4R6R8RlO? Rl2tsuRl
4, and Rl6 (hereinafter these rods will be referred to as R2n), so that these rods R2n can be magnetized in the dot direction. The working ends P of the rods R1 to Rl6 are based on the position of the electromagnetic coils Cl and C2.
The rods R, , R6, and R,6 are commonly sandwiched between the electromagnetic coils Cl, . The rod R against the holder 1 is transmitted to the bias of C2.
,,Yoke Ya that restrains the movement of R6, R, and Rl6
, Yb are provided. Similarly, yokes Yc and Yd are provided to restrain rods R2, R7, RlO and Rl5, and rod R3
, R5, Rl, and yokes Ye, Yf that restrain Rl4
Established, Rod R4 R5? A yoke Yg and Yh that restrains Rl2 and Rl3 is provided. Note that S is yoke Ya-Y
h from the rods R1 to Rl6, respectively.
When holding the object M with the structure described above, the biasing of the electromagnetic coils Cl and C2 is released and the rods R1 to
The point of action P of Rl6 is brought close to the surface of the object M to be held. Then, the rods R1 to Rl6 move relative to the holder 1 according to the height of the opposing portion of the object M. Next, when the electromagnetic coil Cl, C2 is energized, the exciting coil Cl, C
The magnetic flux due to 2VC passes through the magnetic circuit of rod R2n+, object M, rod R2n, and yoke Ya-Yh. Therefore, the yokes Ya and Yb. Yc and Yd,. Ye and Yf,. Yg and Yh overcome the force of the return spring S and are attracted, each restraining the rod between the two yokes. In this state, holder 1
When moving, the object M moves together with the holder 1. In order to release the object M, it is sufficient to stop the energization of the electromagnetic coils Cl and C2. In the above embodiment, the case where electromagnetic coils are provided concentrically on all the rods has been explained, but for example, if an electromagnetic coil is provided concentrically on rod R2n, rod R2n
There is no need to provide an electromagnetic coil to + and .

However, in this case, the holding force is reduced by about half.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of the holding device of the present invention, and FIG. 2 is a diagram showing FIG. 1 cut along line 2-2. R1 to Rl6 are rods, Cl and C2 are electromagnetic coils, 1 is a holder, and Ya-Yh are yokes.

Claims (1)

[Claims] 1. A plurality of rods made of a magnetic material, a holder that holds the plurality of rods so as to be movable in the longitudinal direction of the rods, and a portion of the rods that are magnetized in a specific direction. an electromagnetic coil, a rod located at a position opposite to the working end of the rod with reference to the position of the electromagnetic coil, and a rod that is magnetized in the specific direction among the rods; A rod that is magnetized in a direction opposite to the specific direction by a magnetic coil or another exciting coil is held in common, and movement of the rod relative to the holder is restrained by the bias of the electromagnetic coil. A holding device consisting of a yoke.