JPH01156833U - - Google Patents

Description

[Brief Description of the Drawings] Figure 1 is a front view showing an embodiment of the magnetic chuck of the present invention, and Figure 2 is a diagram showing the magnetic chuck shown in Figure 1 cut between the magnetic pole piece and the spacer. Longitudinal cross-sectional view, Figure 3 is a cross-sectional view taken along line 3-3 in Figure 2, Figure 4 is a cross-sectional view taken along line 4-4 in Figure 2, Figure 5 is a magnetic pole piece. 6th front view showing one embodiment of
The figure is a front view showing one embodiment of the spacer, and FIG. 7 is a front view showing one embodiment of the movable plate. 10: Magnetic chuck, 12: Base member, 14
: Seat plate, 16: Face plate, 18: Magnetic pole piece, 20: Spacer, 24: Magnetic material to be attracted, 26: Working surface, 30: Elongated hole, 34: Non-magnetic member, 36: Magnetic pole part, 38: Connection part, 46: Movable plate, 54: Fixed permanent magnet, 56: Movable permanent magnet, 58: Coupling member, 60: Rack, 62: Pinion, 64:
drive shaft.

Claims (1)

[Claims for Utility Model Registration] (1) Spacers made of non-magnetic material and a plurality of elongated plate-shaped magnetic pole pieces are arranged alternately in the thickness direction of the magnetic pole pieces to define a working surface that attracts magnetic substances. a magnetic chuck comprising a base plate disposed on a side of the face plate opposite the working surface, and a magnet arrangement for selectively placing the working surface in an energized state and a de-energized state, the magnetic chuck comprising: The magnetic pole piece is provided at a predetermined pitch in the longitudinal direction thereof, and includes a plurality of magnetic pole parts that are integral with each other in at least a part of the width direction of the magnetic pole piece and are magnetically separated from each other by non-magnetic parts, The magnet device is a magnetic chuck in which when the working surface is in an excited state, the magnetic pole portions adjacent to each other in the arrangement direction and the longitudinal direction of the magnetic pole pieces act as different poles. (2) The magnetic pole piece is provided with a plurality of elongated holes formed at a predetermined pitch in the longitudinal direction of the magnetic pole piece so as to penetrate the magnetic pole piece in the thickness direction thereof and extend in the width direction of the magnetic pole piece. 2. The magnetic chuck according to claim 1, wherein the non-magnetic portion is a non-magnetic member disposed in the elongated hole. (3) The magnet device is a plurality of plate-shaped fixed permanent magnets magnetized in the thickness direction, and is arranged between adjacent magnetic pole pieces at the same pitch as the magnetic pole parts in the longitudinal direction of the magnetic pole pieces. and a plurality of fixed permanent magnets arranged so that the magnetic pole parts of the adjacent magnetic pole pieces are given different polarities, and the magnetic pole parts that are adjacent to each other in the arrangement direction and the longitudinal direction of the magnetic pole pieces are given different polarities; A plurality of plate-shaped movable permanent magnets magnetized in the plate thickness direction, the movable permanent magnets being movable relative to the fixed permanent magnets so that the magnetization direction is in the arrangement direction of the magnetic pole pieces. 2. A magnet according to claim 1, comprising: a plurality of movable permanent magnets disposed in the work surface; and a drive mechanism for moving the movable permanent magnets to selectively place the work surface in an energized state and a de-energized state. Magnetic chuck. (4) The magnet device is a plurality of movable plates disposed between the magnetic pole pieces so as to be movable in the longitudinal direction of the magnetic pole pieces, and the magnet device is arranged at the same pitch as the fixed permanent magnets in the longitudinal direction. 4. The magnetic chuck according to claim 3, further comprising a plurality of movable plates formed of a plurality of movable plates having cutouts in which the fixed permanent magnets are received.