JPH037093Y2 - - Google Patents

Description

[Detailed Description of the Invention] A widely known method is to temporarily lock a projection nut or the like having a projection for welding on a magnet, and then send it to a target location using a reciprocating supply rod. When installing magnets in this way, consideration must be given to the following points. That is, parts are held on the attracting surface of the magnet very frequently, but the attracting force causes the components to collide strongly with the attracting surface, causing wear at that location. In addition, because the performance of the magnet has improved, the magnetic influence on the surrounding area is greater, and as a result, iron scraps, chips, etc. tend to adhere to areas other than the suction surface, which is unfavorable in terms of equipment maintenance. .

The present invention has been devised with the above-mentioned points in mind, and will be described in detail below with reference to embodiments shown in the drawings. FIG. 1 shows a case where the device of the present invention is applied to welding a projection nut, in which a fixed electrode 1 and a movable electrode 2 are arranged coaxially, and a guide pin 3 of the fixed electrode 1 and a steel plate 4 are shown. They fit together as shown in the figure, and the guide pin 3 protrudes slightly.

As is clear from FIG. 1, the component supply device is installed in an inclined position with respect to the electrode axis, and a supply rod 5 is slidably supported within a guide tube 6, and a magnet 7 and a component 8 are connected to the supply tube. 9 is fixed to the lower end surface of the guide tube 6. Supply pipe 9 is part passage 1
It has a rectangular cross-sectional shape with 0, and its tip has a bifurcated shape as shown in FIG.
1 is formed. The supply pipe 9 connected to the lower end surface of the guide pipe 6 and the magnet 7 are brought into contact with each other as shown in the figure.
It forms the inner wall of. In addition, one side of the temporary fixing chamber 11 is opened to the parts delivery side, and the supply rod 5 is opened from the other side.
are beginning to enter the country. An elongated guide rod 5a is connected to the supply rod 5, and penetrates through a screw hole in a component (projection nut) 8 to perform an advancing operation as shown by the two-dot chain line in FIG. Furthermore, the supply rod 5 is adapted to be driven by an air cylinder 12 connected to the guide tube 6. It is appropriate that the coupling means for the supply pipe 9, the magnet 7, the guide pipe 6, etc. be welded as in the welded portion 13, and although not shown, it is preferable that the supply pipe 9 and the magnet 7 are also welded.

When the part 8 is pushed out, it is sent out while sliding on the attraction surface of the magnet 7. In this case, by setting the sliding length between the component and the magnet attraction surface to be long, the stability of the component at the initial stage of sliding can be improved. For this purpose, the magnet 7 is elongated as shown in the figure in the direction in which the parts are sent out. As is clear from FIG. 2, the outer surface of the magnet 7 is almost continuous with the left outer line of the guide tube 6, and as a result, the shape and size can be compacted, such as neighboring members and steel plate parts. We try to minimize interference with the

4 to 6 show various cross sections of the magnet 7. A hole 15 is made in a thick plate 14 made of a non-magnetic material, a magnet piece 16 is housed therein, and a non-magnetic material is made on the part attraction side. It is covered with a protective plate 17 made of. The parts other than the parts covered with the protection plate 17 are covered with a shielding plate 18 made of ferromagnetic material. Suitable non-magnetic materials include, for example, stainless steel, specifically chromium-nickel stainless steel with an austenitic structure, and suitable ferromagnetic materials include iron and nickel, for example. FIG. 4 shows the case of a sanderch type in which a protective plate 17 is attached to one side of a thick plate 14 and a shielding plate 18 is attached to the other side, and FIG. 5 shows a case where the shielding plate 18 in FIG. This is the case when it takes on the shape of a container and covers the whole area. Further, FIG. 6 shows a case where there is no thick plate as described above, and only the magnet pieces 16 are covered as shown in FIG. 5. Plank 14
The protective plate 17 and the shielding plate 18 may be joined with adhesive, but it is appropriate to perform partial welding, and parts other than the protective plate 17 may be partially or completely connected to the shielding plate as shown in the figure. It is covered with.

The parts 8 fed from the parts feeder (not shown) enter the temporary fixing chamber 11 from the passage 10 and are attracted to the magnet 7 while being strongly attracted and accelerated. Although the kinetic energy of the component 8 at this time is considerably high, the presence of the protective plate 17 prevents wear on the surface of the magnet. In addition, protective plate 1
7 serves as a kind of buffer member, so magnet piece 1
This weakens the impact on the magnet 6 and helps prevent magnetic force from decreasing and wear. Since the magnetic lines of force that should normally go outside pass through the shielding plate 18, which is a ferromagnetic material, no adsorption force is generated on the outer surface of the shielding plate 18, and on the other hand, the lines of magnetic force that should go outside pass through the shielding plate 18, which is a ferromagnetic material. From this, a so-called effective magnetic flux in which lines of magnetic force go outside is obtained, and thereby an adsorption force is generated on the surface of the protection plate 17. Therefore, the protection plate has a reliable adsorption force, and impurities such as iron scraps are not adsorbed to the shielding plate.

As described above, the present invention can reliably solve the above-mentioned problems and realize a practically useful magnet-locked component supply device.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention.
2 is a partial longitudinal sectional side view, FIG. 3 is a plan view of the supply pipe, and FIGS. 4 to 6 are longitudinal sectional side views of the magnet. 5... Supply rod, 11... Temporary fixing chamber, 8... Parts, 7... Magnet, 17... Protection plate, 18... Shielding plate.

Claims (1)

[Scope of utility model registration request] It has a temporary locking chamber that is open to the parts delivery side on one side and into which a component supply rod enters from the other side, and includes a magnet that forms the inner wall of the temporary locking chamber and that attracts and temporarily locks the parts. The magnet is characterized in that the part attracting side of the magnet is covered with a protective plate made of a non-magnetic material, and the other parts are partially or entirely covered with a shielding plate made of a ferromagnetic material. Magnet-locked parts supply device.