JPH0747871Y2 - Magnet box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a structure of a magnet box for temporary storage or supply used in the production of shaft-shaped parts, for example, DHD type diodes.

2. Description of the Related Art Conventionally, a magnet box, which is a storage box utilizing the magnetic force of a DHD type diode, which is a magnetic shaft-shaped component, has a shape as shown in the perspective view of the main part of FIG.

In the figure, a pair of ferrite magnets 2 and a magnetic flux diffusion plate 3 made of an iron plate are attached in parallel at predetermined intervals inside a frame formed by base plates 1a, 1b made of an iron plate, and each of them is made of stainless steel or the like. Each is covered with a non-magnetic cover 4 (the left one is not shown). When the DHD diode 5 is inserted between the covers 4 from an inclined chute or the like, the magnetic forces attracting each other cause the DHD diode 5 to be aligned horizontally and in parallel,
Multiple items are stored.

Problems to be Solved by the Invention By the way, when the DHD type diode 5 is introduced from the vicinity of the upper part of the magnet box, the DHD type diode 5 randomly drops in all directions and angles. Since the internal dimensions of this magnet box are almost the same as the DHD type diode 5, the DHD type diodes 5 that have fallen randomly are caught on the respective covers 4, and the upper surface 4a of the cover 4 or the upper portion 4b of the cover 4 side surface will be described later. It is adsorbed and held for the reason. When even one piece is attached to the cover 4, the DHD type diode 5 that falls subsequently is blocked, which hinders the alignment and the storage capacity.

FIG. 4 is a cross-sectional view of the main part of the ferrite magnet portion. The magnetic flux emitted from the N pole of the magnet 2 passes through the upper side surface 4b and the upper surface 4a of the cover 4, which is a non-magnetic material, and forms an arc shape in the magnet 2. Of S
A magnetic path reaching the pole is formed. The DHD diode 5, which is a magnetic body, is attracted to and attracted to the cover 4 by the magnetic force generated by the magnetic flux emitted from the upper surface 4a and the upper side surface 4b of the cover 4 forming the outer shape of the magnet box.

Therefore, in order to solve the above-mentioned defects, the present invention reduces unnecessary magnetic flux leaking to the outside of the cover and pulls the shaft-like parts caught in the magnet box into the magnet box without holding them. The purpose is to align, hold, or supply.

Means for Solving the Problems In order to solve the above problems, the present invention provides a shaft having magnetism by arranging two plate-shaped magnets covered with a non-magnetic cover at a predetermined interval so as to face each other. In a magnet box for aligning and holding shaped parts in a magnetic field space, a magnetic base plate that covers the magnet from the opposite surface to the upper surface is provided.
The shaft-shaped component is a DHD diode, and the predetermined interval is set to be substantially the same as the length thereof.

The magnetic flux from the N pole of the magnet reaches the S pole from the upper side surface of the cover of the non-magnetic material to the S pole when there is no magnetic body on the upper surface of the magnet. By bringing the upper surface portion from the opposite surface (S pole side) of the facing surface to the facing surface (N pole side) by the magnetic base plate, most of the magnetic flux is in the upper end portion of the magnetic base plate as a magnetic path. In order to
It is possible to reduce the amount of magnetic flux leaking to the outside from the upper surface and the upper side surface of the cover to prevent undesired adsorption of the magnetic shaft-shaped component to the cover.

Although the upper end of the magnetic base plate is magnetized, if necessary, this portion can be covered with a non-magnetic material to prevent leakage of magnetic flux.

EXAMPLE An example in which the magnet box according to the present invention is applied to a storage box for a DHD type diode which is a shaft-shaped component will be described below with reference to the drawings. However, the members described in the related art are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 is a perspective view of a main part of a magnet box. In FIG. 1, a part different from the conventional device is an inverted L-shape that covers each of the facing magnets 2 from the opposite surface to the upper surface part. The magnetic base plate 10 is provided side by side, and the lead plate 6 is additionally provided on the magnetic base plate 10.

With the above-described configuration, as will be described in detail below, since the magnetic flux leaking to the outside from the upper surface portion 4a or the upper side surface portion 4b of the cover 4 is reduced, the DHD type diode 5 which is put into the magnet box by the inclined chute or the like is covered. The magnetic field space between the facing magnets 2 is normally aligned and held without being attracted to an undesired portion of 4.

FIG. 2 is a sectional view of an essential part showing a magnetic path of magnetic flux in the upper part of the magnet box of the present invention. In the figure, the inverted L-shape is formed so as to cover from the surface opposite to the facing surface of the magnet 2 to the upper surface. After the magnetic flux of the N pole of the magnet 2 is changed to a magnetic flux of uniform density by the diffusion plate 3 by the magnetic base plate 10 of, the magnetic path is set so as to reach the position of the magnetic base plate 10 magnetized to the S pole. Form. At this time, most of the magnetic flux passes through the upper end portion 10c of the magnetic base plate 10 and reaches the S pole of the magnet 2. Therefore, leakage of the magnetic flux from the upper side surface 4b and the upper surface 4a of the cover 4 to the outside is reduced. To be done.

Further, the upper end portion 10c of the magnetic base plate 10 is also magnetized, but since the magnetic path direction of the magnetic flux is parallel to the direction connecting the N-S poles,
The upward magnetic force is weak, and the magnetic force on the upper surface 4a of the cover 4 is reduced to about 10% as compared with the conventional device as a whole.

Further, by providing the lead plate 6 which is a non-magnetic material on the upper end portion 10c of the magnetic material base plate 10, the magnetic force on the upper surface 4a of the cover 4 is reduced to about 5% as compared with the conventional device.

Although the magnet box for accommodating the shaft-shaped parts in which the magnets are arranged parallel to each other at a predetermined interval has been described in the above embodiment, the present invention is not limited to this embodiment, and the magnet is viewed from above. It goes without saying that the present invention can be applied to a magnet box which is arranged in a V-shape and sequentially supplies the shaft-like parts to the device or the like.

Further, the present invention does not necessarily require a lead plate because the magnetic sheet plate can sufficiently reduce undesired leakage of magnetic flux.

As described above, according to the present invention, an inverted L-shaped magnetic base plate is provided to cover the magnets of the magnet box in which the magnets are arranged to face each other to form a magnetic field space from the opposite surface to the upper surface. By forming a magnetic path in which the magnetic flux passes centrally in the upper end of this magnetic base plate, it is possible to block the leakage of magnetic flux to the magnetic force unnecessary portion outside the cover of the magnet box, and Undesired adsorption can be prevented.

If necessary, a lead plate may be additionally provided on the magnetic base plate to obtain a complete magnetic flux leakage blocking effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a magnet box according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of the main part showing a magnetic path of magnetic flux in the upper part of the magnet box. FIG. 3 is a perspective view of an essential part showing a state where a DHD type diode is put in a conventional magnet box, and FIG. 4 is a sectional view of an essential part showing a state in which a magnetic flux in the conventional magnet box leaks to the outside. It is a figure. 2 ... Magnet, 3 ... Magnetic flux diffusion plate, 4 ... Cover, 4a, 4b
...... Top of cover, top of side, 5 ...... Axial component (DHD type diode), 10 ...... Inverted L-shaped magnetic base plate.

Claims (1)

[Scope of utility model registration request] 1. A magnet box in which two plate-shaped magnets covered by a non-magnetic cover are arranged to face each other at a predetermined interval, and axial members having magnetism are aligned and held in a magnetic field space. A magnet is provided with a magnetic base plate that covers the magnet from the opposite surface to the upper surface, and the shaft-like component is a DHD diode, and the predetermined interval is set to be substantially the same as the length thereof. box.