JPH0945523A - Magnetic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a magnetic apparatus which adjusts a magnetic force to be given to the outside of base while an intermediary magnetism-absorbing body is moved by a small force by a method wherein the intermediary magnetism-absorbing body which is brought into contact with, and separated from, an upper magnetism-absorbing body and a lower magnetism-absorbing body in a magnet group is provided, so as to be movable back and forth, between an N-pole magnet group and an S-pole magnet group. SOLUTION: A-pair of magnetism-absorbing bodies 72, 73 such as iron materials are provided on the surface of a base 70 so as to be fixed with a gap 78 in between. Then, two sets of magnet groups 76, 77 in which magnetic poles N, S are mutually reversed are placed on the respective magnetism-absorbing bodies 72, 73, and magnetism-absorbing bodies 72', 73' which are the same as the N-pole magnetism-absorbing body 72 and the S-pole magnetism- absorbing body 73 are put on them. Then, intermediary magnetism-absorbing bodies 74, 75 by which a piston lever 80 at a hydraulic cylinder 79 is made to creep into a gap 78 and by which the lever is raised so as to be removed from the gap 78 are fixed while a stainless steel reinforcement member 86 is interposed. At this time, one end of the magnetism- absorbing body 74 comes into contact with the magnetism-absorbing body 72, the other end comes int contact with the magnetism-absorbing body 73, one end of the intermediary magnetism-absorbing body 75 comes into contact with the magnetism-absorbing body 72', and the other end comes into contact with the magnetism-absorbing body 73'.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic device which can easily supply and block a magnetic force with a small force.

A magnetic device according to the present invention has the following configuration.

In a state where the N and S magnetic poles are opposite to each other on the base, an N pole magnet group and an S pole magnet group surrounded by magnetic absorbers are fixedly mounted with a space therebetween, and the N pole magnet group and the S pole magnet group are fixed. A magnetic device equipped with an intermediary magnetic absorber that is in contact with and separates from the upper and lower magnetic absorbers of the magnet group in a reciprocating manner.

Next, examples will be shown.

In the figure, reference numeral 70 denotes a base, on the upper surface of which a pair of magnetic absorbers 72 and 73 made of iron or the like are fixed with a gap 78, and the magnetic poles N and S are reversed on the respective magnetic absorbers 72 and 73. 2 sets of magnet groups 76 and 77 are placed on the magnetic poles 72 and 73 ', which are similar to the N pole magnetism absorber 72 and the S pole magnetism absorber 73.
Guess.

A hydraulic cylinder 79 has a piston rod 80 in which the intermediary magnetic absorbers 74 and 75 that enter the space 78 and ascend to move out of the space 78 are fixed with a stainless auxiliary material 86 interposed. In addition, intermediary magnetic absorbers 74, 7
When 5 enters the void 78 and comes into contact with the base 70 and stands still, one end of the intermediary magnetic absorber 74 contacts the magnetic absorber 72, the other end contacts the magnetic absorber 73, and one end of the intermediate magnetic absorber 75 absorbs the magnetic absorber 7.
2 ', and the other end is in contact with the magnetic absorber 73'.

Thus, if the intermediary magnetic absorbers 74, 75 rise apart from the air gap 78, the pair of left and right magnetic forces act strongly, and if the intermediary magnetic absorbers 74, 75 enter the air gap 78, N, S absorption is performed. Since the magnetic bodies 72, 73 and 72 ', 73' communicate with each other by the intermediary magnetic absorbers 74, 75, the magnetic force does not spread outward, and the magnetic force outside disappears. In the figure, 90 indicates an outer frame.

In the embodiment shown in FIG. 5, the crusher A of a civil engineering machine is the concept of the present invention. It absorbs rebar scraps and the like generated when a building is dismantled on the frame 1 and is used as a carrier of a carrier vehicle or the like. It is designed to carry and release the magnetic force.

According to the present invention, since the magnetic force applied to the outside of the substrate can be adjusted by moving the intermediary magnetic absorber with a small force, the magnetic force can be moved with a small force and can be utilized in various devices.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a state in which a magnetic force spreads outward.

FIG. 2 is a vertical cross-sectional front view of a state in which magnetic force does not spread outward.

FIG. 3 is a vertical sectional side view of FIG.

FIG. 4 is a cross-sectional plan view.

FIG. 5 is a side view showing a usage example.

[Explanation of symbols]

 70 base 72, 73 magnetic absorber 72 ', 73' magnetic absorber 74, 75 intermediary magnetic absorber 76, 77 magnet group 78 air gap 79 hydraulic holder 80 piston rod 86 auxiliary material

Claims (1)

[Claims] 1. An N-pole magnet group surrounded by magnetic absorbers and an S-pole with S poles being opposite to each other on a base.
A pole magnet group is fixedly mounted in a space, and an intermediary magnetism member that is in common contact with and separates from the upper and lower magnetism bodies of the magnet group is provided between the N-pole magnet group and the S-pole magnet group so as to reciprocate. Magnetic device.