JPH08207496A - Recovery device for residue of eraser containing magnetic powder - Google Patents

Abstract

PURPOSE: To provide a recovery device for the residue of an eraser containing a magnetic powder which can collect the residue continuously and efficiently with the residue attracted to a magnet removed automatically. CONSTITUTION: A device has a case 1 and a roller 2 which is placed in the case 1 freely rotatably with a part of it protruded from the bottom surface of the case 1. In places in the circumferential direction on the periphery of the roller 2, radial holes 3 are formed radially, respectively. A magnet 4 the height of which is lower than the depth of the hole 3 is placed in each hole 3 freely movably radially. The surface of the roller 2 is covered with a ring- shaped non-magnetic material cover 5 to block the holes 3, while other magnets 6 are placed in places facing the outside of the roller 2 in the inner surface part of the case 1. The pole of the magnet 6 close to the roller 2 and the pole radially on the outside of the magnet 4 placed in the hole 3 of the roller 2 are made to agree.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eraser dust collecting device for a rubber-containing eraser.

[0002]

2. Description of the Related Art Conventionally, an eraser containing magnetic powder is known. This eraser makes it possible to collect erased scraps by adsorbing them to a magnet. However, when the erase dust is adsorbed on the magnet, there is an inconvenience that the cleaning work can be continued only after the erase dust is removed.

[0003]

DISCLOSURE OF THE INVENTION An object of the present invention is a novel eraser containing a magnetic powder capable of continuously and efficiently collecting the erased dust adsorbed on the magnet. The purpose is to provide a recovery device.

[0004]

In order to achieve the above object, an apparatus for collecting erased scraps of a magnetic powder-containing eraser according to the present invention includes a case 1 and an inside of the case so that a part of the case 1 is projected from a bottom surface of the case 1. And a roller 2 rotatably housed therein, and radial holes 3 are respectively provided at a plurality of circumferential positions on the outer peripheral surface of the roller 2, and the depths of the holes 3 are provided inside the holes 3. The magnet 4 having a height lower than that of the roller 4 is accommodated movably in the radial direction, and the outer peripheral surface of the roller 2 is covered with a ring-shaped non-magnetic cover 5 to close the opening of the hole 3, while the case Another magnet 6 is installed at a plurality of locations on the inner surface of the roller 1 facing the outer peripheral surface of the roller 2, and the pole of the end of the magnet 6 near the roller side and the magnet 4 housed in the hole 3 of the roller 2 are provided. The pole at the outer end in the radial direction in Is intended to adopt a configuration in which the.

[0005]

When the case 1 is moved back and forth on the desk, the roller 2 is rotated. The magnet 4 housed in the hole 3 that is positioned on the bottom surface side of the case 1 by the rotation of the roller 2 drops due to gravity and moves to the outer peripheral surface side of the roller 2, and the nonmagnetic cover 5 It will come into contact with the inner surface.
In this state, the magnet 4 adsorbs the eraser 7 of the eraser containing the magnetic powder on the outer peripheral surface of the non-magnetic cover 5. Case 1
When is moved, the roller 2 is further rotated, and the hole 3 accommodating the magnet 4 to which the erased scrap 7 is adsorbed comes to a position facing the magnet 6 installed on the inner surface of the case 1. At this time, the repulsive force between the magnets 4 and 6 causes the magnet 4 in the hole 3 to move toward the back of the hole 3. As a result, the erase dust 7 adsorbed on the non-magnetic cover 5 is released from the magnetic force of the magnet 4 housed in the hole 3 and instead adsorbed on the magnet 6 installed on the inner surface of the case 1. It In this way, the erase dust 7 adsorbed to the non-magnetic cover 5 under the bottom surface of the case 1 is removed from the non-magnetic cover 5 inside the case 1 and adsorbed and accumulated on another magnet 6. Therefore, when the outer peripheral surface of the non-magnetic cover 5 again projects from the bottom surface of the case 1, it is in a solid state without the erase dust 7, and the erase dust 7 can be adsorbed again. Therefore, continuous cleaning work is possible.

[0006]

Embodiments of the present invention shown in the drawings will be described in detail below. The case 1 is composed of a case body 8 and a lid 9. One side of the case body 8 is open, and the open portion is covered with a removable lid 9. The lid 9 is a screw (not shown)
It is fastened to the case body 8 by, for example. In addition, the case body 8
The bottom hole 10 is provided in the. Side wall of case body 8 and lid 9
A horizontal shaft 11 is installed between them, and the roller 2 is attached to the horizontal shaft 11. Further, discs 12 each having an outer diameter slightly larger than that of the roller 2 are attached to both side surfaces of the roller 2. On the outer peripheral surface of the roller 2, a plurality of holes 3 are radially provided at a constant pitch in the circumferential direction. The orientation of these holes 3 is radial. Inside each of these holes 3, a magnet 4 is housed movably in the radial direction. The height (radial length) of the magnet 4 is smaller than the depth of the hole 3, and the hole 3 has a space in the radial direction. All the magnets 4 in the holes 3 are housed so that their poles are aligned. For example, all the magnets 4 have the same orientation such that the end on the N pole side is located on the opening side of the hole 3 and the end on the S pole side is located on the inner side of the hole 3. The outer peripheral surface of the roller 2 is covered with a thin, ring-shaped nonmagnetic cover 5, and the opening of the hole 3 is shielded. Therefore, the magnet 4 does not drop out of the hole 3. On the other hand, another magnet 6 is attached to the inner surface of the case body 8 at a plurality of locations facing the outer peripheral surface of the roller 2, that is, three locations on the inner surface of the front wall, the rear wall and the top plate of the case body 8. There is. All of these magnets have the same pole orientation.
That is, those magnets 6 have poles at the ends near the roller side aligned with poles at the radially outer ends of the magnets 4 housed in the holes 3 of the roller 2, and when the magnets face each other, repulsive force is generated. It is oriented to occur. Therefore, when the hole 3 of the roller 2 and the magnet 6 face each other, the magnet 6 attached to the case body 8 is fixed and cannot move.
Only the magnet 4 in the hole 3 moves toward the inner side of the hole 3, that is, the center in the radial direction by the repulsive force. The lower ends of the roller 2, the non-magnetic cover 5 and the disc 12 are bottom holes 10 of the case body 8.
When the disk 12 is projected from the table and placed on a desk, the outer peripheral surface of the disk 12 comes into contact with the desk surface. Then, a gap 13 is formed outside the non-magnetic cover 5 between the discs 12 and the erase dust 7 in the gap 13 is applied by the magnet 4 to the non-magnetic cover 5.
Will be adsorbed on the outer peripheral surface of. Roller 2
The reason why the disc 12 is attached to the above and the gap 13 is formed is to prevent the erase dust 7 from being pressure-bonded to the outer peripheral surface of the non-magnetic cover 5. This is because if the erase dust 7 is pressed against the non-magnetic cover 5, it will be difficult to separate it and the magnet 6 attached to the case 1 will not be able to receive the erase dust 7 smoothly.

[0007]

The present invention is as described above. When the case 1 is moved to rotate the roller 2, the magnet 4 attached to the roller 2 attracts the erase dust 7, and the erase dust 7 is moved to the case. Since it can be automatically removed from the roller 2 by the magnet 6 mounted inside, continuous adsorption work of the eraser scrap 7 by the roller 2 is possible, and the efficiency of the cleaning work can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a central portion.

FIG. 2 is a transverse sectional view of a central portion.

[Explanation of symbols]

 1 Case 2 Roller 3 Hole 4 Magnet 5 Non-magnetic Cover 6 Magnet 7 Eraser 8 Case Body 9 Lid 10 Bottom Hole 11 Horizontal Axis 12 Disc 13 Gap

Claims (1)

[Claims] 1. A case 1 and a roller 2 rotatably accommodated inside the case so that a part of the roller 2 protrudes from the bottom surface of the case 1. Radial holes 3 are radially provided at the respective positions, and magnets 4 having a height lower than the depth of the holes 3 are accommodated in the holes 3 so as to be movable in the radial direction, and the outer circumference of the roller 2 is accommodated. The surface is covered with a ring-shaped non-magnetic cover 5 to close the opening of the hole 3, and on the other hand, another magnet 6 is installed at a plurality of locations on the inner surface of the case 1 facing the outer peripheral surface of the roller 2. A magnetic powder-containing eraser characterized in that the pole of the end of the magnet 6 near the roller and the pole of the end of the magnet 4 housed in the hole 3 of the roller 2 in the radial direction are the same. Eraser collection device.