JPH0568908A - Magnetic sorter - Google Patents

Abstract

PURPOSE:To enhance sorting capacity while reducing the leakage of a line of magnetic force in the vicinity of the falling place of an object to be inspected by specifying the arrangement of a plurality of magnets in a magnetic sorter wherein magnets are fixed to the interior of a rotary cylinder and the intensity change in magnetic force is generated on the surface of the cylinder to sort a magnetic body. CONSTITUTION:Four anti-slip ribs 11 are provided to the surface of a cylinder 1 made of aluminum and five trough-shaped magnets 21 are bonded to the protruding parts formed to the surface of a columnar body 2 having a fan-shaped cross section. That is, two N-type magnets 21n each having an N-pole provided to the trough-shaped protruding surface thereof and three S-type magnets 21s each having an S-pole provided to the trough-shaped protruding surface thereof are provided to the columnar body 2 in the order of N-type/S-type/N-type/S- type/S-type so as to cover the whole of the protruding parts on the surface of the columnar body 2. The columnar bodies 2 fitted with magnets are arranged in the cylinder 1 in a non- rotatable manner so as to provide a predetermined gap and the cylinder 1 is rotated by a drive source and only a magnetic body is attracted to the columnar body 2 from a device continuously feeding an object to be inspected by the magnetic force of the columnar body 2 and rotated in the state held to the cylinder to be allowed to naturally fall at a place where the magnetic field generated by the magnets is weak.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sorting machine which sorts an object to be inspected according to its magnetic strength.

[0002]

2. Description of the Related Art It is preferable to use a magnet for separating and selecting magnetic materials. However, if you normally try to separate and sort using magnets, once the magnetic material is attracted by the magnets,
Two types of processes, that is, pulling away from the magnet, are required, and another magnetic substance cannot be attracted during the process of pulling away the magnetic substance from the magnet. When it was necessary to sort out, it was unsuitable.

[0003]

SUMMARY OF THE INVENTION Therefore, it is a technical object of the present invention to provide an apparatus capable of separating and selecting magnetic substances without delay.

[0004]

According to the present invention, a magnet is fixed inside a cylinder that rotates about the central axis of the cylinder, while a strip of the magnet fixed inside the cylinder is curved in an arc shape. Such a trough-shaped plate magnet, in which the N pole is arranged on the concave side of the arc and the S pole is arranged on the convex side of the arc, or vice versa, the magnet whose N pole is arranged on the convex side of the arc and S pole is arranged on the concave side of the arc , The required number of strip magnets are arranged, these strip magnets are arranged so that their long sides are in contact with each other, and are arranged in a superior arc shape along the inner circumference of the cylinder, and at least on the most downstream side in the rotating direction of the cylinder. In the two plate-shaped magnets positioned, by making the seeds of the magnetic poles on the convex side of the magnets the same, the strength of the magnetic force is partially generated on the cylindrical surface, and a device for selecting the magnetic substance without delay is configured. ..

Further, while the magnet is fixed inside the cylinder which rotates around the central axis of the cylinder, the magnet fixed inside the cylinder is a trough-shaped plate magnet such as a strip curved in an arc shape. , N poles on the concave side of the arc and S poles on the convex side of the arc, or vice versa, those with N poles on the convex side of the arc and S poles on the concave side of the arc are adopted in the required number respectively. The strip-shaped magnets are arranged so that the long sides of the strips are in contact with each other and are arranged in a superior arc shape along the inner circumference of the cylinder, and the magnetic poles on the concave side of the two plate-shaped magnets located at both ends are made different. By doing so, the strength of the magnetic force is partially generated on the surface of the cylinder, and an apparatus for selecting a magnetic material is configured.

[0006]

EXAMPLES The present invention will be described below based on examples.

Four anti-slip ribs 11, 11, ... Are provided on the surface of the aluminum cylinder 1. On the other hand, the cross section has a central angle of 225.
Five trough-shaped plate magnets 21n, 21s, 21n, 21s, and 21s are attached to the convex portion of the columnar body 2 having a fan shape of °. Each of these plate-shaped magnets 21n, 21s, ... Is a samarium-cobalt magnet, and has two N-type magnets 21n each having an N pole on the gutter-shaped convex surface and an S pole on the gutter-shaped concave surface, and an S-pole on the gutter-shaped convex surface. Three S-shaped magnets 21n each having an N pole on the trough-shaped concave surface, five in total, cover the entire columnar convex portion of the columnar body 2. Moreover, the bonding order is N-type, S-type, N-type, S-type, and S-type.

Inside the ribbed cylinder 1, a magnet-attached columnar body 2 is provided.
To store. When the magnet-attached columnar body 2 is housed in the cylinder 1, the magnet-attached columnar body 2 has a size such that it can be loosely fitted with a slight gap left around the magnet. After that, the shaft-covers 12 and 13 are attached to both ends of the cylinder 1, and the support shaft 22 is taken out from the pillar 2. A hole for taking out the support shaft 22 is formed in one of the shafted lids. Now, both ends of the cylinder 2 are rotatably supported by the bearings 3 and 3, and the cylinder 2 is rotated by connecting to a drive source (not shown). The support shaft 22 is fixed to the support column 4 so that the column body 2 does not rotate even if the cylinder 2 rotates. At this time, the fan end of the pillar 2 on the side to which the N-type magnet is attached comes down, and the rotation direction of the cylinder 2 is the N-type, S-type, N-type of the magnet on the surface of the pillar 2.
The direction of the arrangement of the mold, S type, and S type should be the same.

Although the sorting machine of this embodiment is constructed as described above, the practical use method of this embodiment is that the sorting machine is slightly floated on the device for arranging the specimens flat and continuously feeding them. All that is required is to place and rotate the cylinder of the sorter. Then, due to the magnetic field excited by the magnet inside the cylinder, only the test object with magnetism of a certain value or more is attracted to the surface of the cylinder, it is caught by the rib and rotates with the cylinder, and it rotates to the place where the magnetic field generated by the magnet is weak. And fall naturally. And, those that are weak in magnetism and can not be attracted to the cylindrical surface are
It flows to the end of the continuous feeding device. Sorting is completed by collecting the above two separately. At this time,
It goes without saying that the magnetic value as the threshold value of the sorting can be adjusted by changing the distance at which the sorting machine is floated from the continuous feeding device.

[0010]

In the above embodiments, the arrangement of magnets in the cylinder is not N type, S type, N type, S type, N type, but N type.
By arranging the mold, the S-shape, the N-shape, the S-shape, and the S-shape side by side, the leakage of the lines of magnetic force is reduced in the vicinity where the test object attracted to the surface of the cylinder falls. In other words, by arranging two magnets of the same type, the magnetic force of these magnets weakens, the total number of magnetic field lines decreases, and since the magnets at both ends arranged in a superior arc shape are different types, the magnetic field lines between them are different. The lines of magnetic force are less likely to leak due to the attraction, and the magnetic field in the vicinity of the fall of the test object becomes very weak. Therefore, the test object cannot continue to remain on the cylindrical surface and falls. Therefore, the test object does not continue to rotate while sticking to the cylindrical surface. Thus, the sorting machine of the present invention is very useful for sorting objects by magnetism, and has high industrial utility value.

[Brief description of drawings]

FIG. 1 is a cross-sectional view illustrating a usage state of an example.

FIG. 2 is a sectional view of an example.

FIG. 3 is a schematic diagram of magnetic force line distribution when magnets are arranged in N-type, S-type, N-type, S-type, and N-type.

FIG. 4 is a schematic diagram of magnetic field distribution when magnets are arranged in N-type, S-type, N-type, S-type, and S-type.

[Explanation of symbols]

 1 cylinder 2 column

Claims (2)

[Claims] 1. A device for selecting a magnetic material by fixing a magnet inside a cylinder rotating about a central axis of the cylinder to partially generate magnetic strength on the surface of the cylinder, the magnetic material being selected. The magnet to be fixed inside is a trough-shaped plate-like magnet with a strip curved in an arc shape, with the N pole arranged on the concave side of the arc and the S pole arranged on the convex side of the arc, or vice versa. Are arranged on the convex inner side of the circular arc and the S poles are arranged on the concave side of the circular arc in the required number, and these strip-shaped magnets are arranged along the inner circumference of the cylinder so that their long sides are in contact with each other. A magnetic type characterized in that the seeds of the magnetic poles on the convex side of the magnets are the same in at least two plate-shaped magnets that are arranged in a superior arc shape and are located at least on the most downstream side in the direction of rotation of the cylinder. Sorting machine. 2. An apparatus for selecting a magnetic material by fixing a magnet inside a cylinder rotating about a central axis of the cylinder to partially generate magnetic strength on the surface of the cylinder, which is a cylinder. The magnet to be fixed inside is a trough-shaped plate-like magnet with a strip curved in an arc shape, with the N pole arranged on the concave side of the arc and the S pole arranged on the convex side of the arc, or vice versa. Are arranged on the convex inner side of the circular arc and the S poles are arranged on the concave side of the circular arc in the required number, and these strip-shaped magnets are arranged along the inner circumference of the cylinder so that their long sides are in contact with each other. A magnetic type sorting machine characterized in that the magnetic poles on the concave side of the two plate-shaped magnets located at both ends are different from each other while being arranged in a superior arc shape.