JPS59129639A - Apparatus for controlling feed of part supplying apparatus - Google Patents

Abstract

PURPOSE:To lower gradually resistance of slip of parts, by providing an auxiliary sliding member of a magnetic material continuously form a part sliding surface in a direction in which the parts will be forced out. CONSTITUTION:A head main body 6 of a part supplying apparatus 5 is provided with a transient stopping chamber 7 that is open downward and in communication with a part supplying path 8. A magnet 11 is fixed in front of the path 8, and one side surface of the magnet 11 serves as a part sliding surface 12 that defines part of the inner wall of the transient stopping chamber 7. A supply head 14 is actuated by the reciprocative movement of an air cylinder 15 and can be slid in a guide cylinder 16 in the head main body 6. The auxiliary sliding member 20 of a magnetic material extends continuously from the part sliding surface 12 in the pushing direction of a nut 17, and when the nut 17 leaves the part sliding surface 12, the resistance of slip of the part is gradually lowered due to the presence of the member 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides that a component temporarily secured to a component sliding surface of a magnet is
This relates to a parts feeding device in which the parts are pushed out by the advancing stroke of the feeding rod while being slid on the sliding surface, and in particular, the feeding control a1 is performed so that the behavior of the parts during feeding is smoother than that of the tube, and the supply is stabilized. It improves sexuality.

Various types of parts supplying apparatuses of the type described above are known, but here, one for supplying a projection nut to a spot welding apparatus is exemplified. To explain this with reference to FIG. 1, a movable electrode 1 that moves forward and backward by a driving source such as a fluid cylinder (not shown) and a fixed electrode 2 that is attached to a stationary member (not shown) are coaxial. A steel plate 6, which is a counterpart member, is positioned on the fixed electrode 2 by a pin 4.

To explain the component supply device 5, the head main body 6 is provided with a temporary fixing chamber 7 that opens downward.
A component supply passage 8 is communicated with.

This passage 8 is formed by a port 9 opened in the head body 6 and a component supply pipe 10. A magnet 11 is fixed at the front position of the component supply passage 8, and the side surface of the magnet 11 is attached to the temporary fixing chamber 7.
A component sliding surface 12 forms one inner wall of the inner wall. The illustrated magnet 11 is a permanent magnet, and is fixed to the head body using bolts 16.1. It may be an electromagnet instead of a permanent magnet.

``The supply rod 14 is operated by the forward and backward movement output of the air cylinder 15, and is configured to slide within a guide piece 16 provided on the head body 6. Since the part 17 to be supplied in the illustrated case is a projection nut I, the supply rod 14 includes a guide rod 1 that enters the threaded hole of the nut.
8 is provided, and an extrusion surface 19 is provided at the boundary between the supply rod 14 and the guide rod 18. In the illustrated state, the nut 17 is attached to the component sliding surface 12 and is temporarily locked, and the positional relationship of each part is set so that the screw hole of the nut 17 and the supply rod 14 are coaxial. ing.

In the state shown in Fig. 1, the supply lot l-' 14 advances and -C
When it comes, the guide rod 18 first enters the threaded hole of the nut 17, and then the extrusion surface 19 comes into contact with the nut 17, and the nut 17 is pushed out while being slid on the component sliding surface 12. Natsuto is away from the music screen 12 2
' and then slides on the kite rod 18 to match the pin 4. The state shown by the two-dot chain line in Fig. 1 is the nut 17.
This indicates a period of supply transition.

The parts supply device as described in the following is a mechanism disclosed in Kariko Publication No. 47-41655, which I invented, but it has a unique phenomenon.

That is, when the nut 17 is pushed by the extrusion surface 19 while sliding on the component sliding surface 12, the sliding resistance of the nut 17 becomes considerably high due to the attraction force of the magnet 11, and the nut 17 is pushed by the extrusion surface 19. 17 separates from the component sliding surface 12, the sliding resistance suddenly disappears. The situation is shown in Figure 2.R on the vertical axis is the sliding resistance, and 8 on the horizontal axis is the sliding stroke.When the nut 17 leaves the sliding surface of the component, the sliding resistance R disappears. There is.

Such a characteristic causes the supply rod 14 to rapidly accelerate from the time when the sliding resistance disappears, and therefore the nut 17
There is a danger that only the guide rod may fly out forcefully and become detached from the guide rod 18. When an air cylinder is used to drive the supply rod 14 forward and backward, the fluid is compressible, so sudden acceleration of the supply rod is more likely to occur, and for this reason the length of the guide rod 18 must be adjusted. but,
There is a very low probability that there is a risk of Natsu withdrawal as mentioned above.

The present invention reliably solves the above-mentioned problems using the characteristics of the magnetic phenomenon and with a simple configuration. The first embodiment is shown in FIGS. 4 and 5,
The magnet 11 is shown as a single item in FIG. 1 with the magnet 11 removed. An auxiliary sliding member 20 made of a magnetic material extends in the direction of extrusion of the nut 17 while being continuous with the component sliding surface 12. This member 20 is made of a long and narrow steel plate as shown, and is press-fitted into a narrow groove cut into the magnet 11, as is clear from FIGS. 4 and 5.

As the nut 17 is pushed out in the direction of the arrow in Figure 'fJ4,
While sliding on the component sliding surface 12, there is a constant sliding resistance, but after leaving the component sliding surface 12, the auxiliary sliding member 2
0, the sliding resistance gradually decreases as shown in FIG. This is the auxiliary sliding member 2a.

This is because the magnetic force of the nut 11 decreases as the distance from the magnet 11 increases, and the contact area of the nut 17 decreases.

6 and 7 show a second embodiment, in which the auxiliary sliding member 21 installed in the same manner as in the first embodiment is fixed with bolts 22. As is clear from FIG. The plate width gradually decreases toward the tip. If the member 21 has such a shape, the magnetic influence of the member will be stronger than in the first embodiment, so its characteristics will be as shown by the dotted line in FIG.

Further, in the sixth embodiment shown in FIGS. 8 and 9, an auxiliary sliding member 25 made of steel wire is embedded in the component sliding surface 12. As shown in the figure, two are installed with a narrow gap between their tips.

Note that in the embodiments described above, the auxiliary sliding member is prepared in the form of a separate part.
It is also possible to configure the auxiliary sliding member to be extended integrally when molding the magnet 11.

According to the present invention, in the component feeding device of the type described at the beginning, an auxiliary sliding member made of a magnetic material is provided extending in the extrusion direction of the component in a continuous state with the component sliding surface. Therefore, the sliding resistance of the component can be gradually reduced even after the component has separated from the component sliding surface of the magnet.
Therefore, the advancing speed of the supply rod will not be suddenly accelerated, and the parts will not be separated from the supply rod in advance. In addition, since the auxiliary sliding member has a shape that extends from the main body of the magnet, the attraction force of the component on the auxiliary sliding member gradually decreases toward the tip, as shown in Figure 6. Suitable for determining resistance changes.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view showing an example of a parts supply device, Figs. 2 and 6 are diagrams showing the relationship between sliding resistance and extrusion stroke, and Fig. 4 and subsequent figures show examples of the present invention. , Figures 4 and 5, Figures 6 and 7, Figures 8 and 9
The figures are respectively ``!IJ1 embodiment, $2 embodiment, and 6th embodiment. 11... Magnet, 12... Part sliding surface, 17... Part, 14... Supply rod, 5 ...parts supply device, 2
0.21.25...Auxiliary sliding member. Applicant Tetsuya Nagao

Claims (1)

[Claims] An auxiliary sliding member made of a magnetic material is used in a component supply device in which a component temporarily locked on a component sliding surface of a magnet is pushed out by the advance stroke of a supply rod while sliding on the sliding surface. A delivery control device for a component supply device, characterized in that the device is provided extending in the component extrusion direction in a continuous state with the sliding surface.