JPH0198516A - Parts supply device - Google Patents

Abstract

PURPOSE:To ensure supply, in the supply device of a projection nut, etc., by making parts to be held and moved by the cooperation of a magnet, which is at the tip of an inner side shaft composing a supply rod, and a parts locking projection at the tip of an outer side shaft, and by making a magnetic absorption to be released by the retreat of the inner side shaft. CONSTITUTION:A nut 21 is entered into a tip project 34 of an outer shaft 15 from an unshown shooter, and absorbably held to a magnet 20 at the tip of an inner shaft 16. And a supply rod 17 is made to proceed with an unshown cylinder in the condition. This causes the nut 21 to pushedly open the opening and closing plates 36 and 37 to proceed to a given position. Then an inner shaft 16 is made to retreat with a cylinder 45 actuated. This causes the attraction force with the magnet 20 to be extinguished and the nut 21 to be released from its holding to be fallen. This constitution enables supply to be ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention relates to a parts supply device, and its main purpose is to reliably supply a projection nut, a projection bolt, etc. having a projection for melting to a target location. It is placed.

(b) Prior art The prior art that is considered to be closest to the present invention is the
This is a technique disclosed in Japanese Patent No. 7549 (No. 323, November 14), and its main points are shown in FIGS. It is assembled in a possible state, and there is a part (nut) 3 at the tip of the inner shaft 2. The attracting magnet (permanent magnet) 4 is fixed. The opposing sheet metal part 5 is placed on a fixed electrode 6, and the fixed shafts 1 and 2 have their end surfaces They are aligned on one plane so that they are flush with each other, and the nuts 3 are attracted thereto.

In this state, both shafts advance together and reach a certain point (the state shown in Figure 9).

The inner shaft 2 is prohibited from advancing, and only the outer shaft 1 advances, and the nut 3 is fitted into the guide pin 7 as shown in FIG.

(c) Problems to be Solved by the Invention In the prior art as described above, the nut 3 is attracted to the lower end surfaces of both shafts 1 and 2, which are flat. There is also the problem that if some external force is applied and the magnetic force of the magnet 4 is reduced, the nut 3 may shift or, in the worst case, fall off. If it is a perforated part like a nut, the first
As shown in Fig. 1, there is a tendency for the magnet 4 to be paired with the portion without a hole, resulting in misalignment of the nut.

Furthermore, in the prior art, the magnet 4 is stopped and only the outer shaft 1 is advanced, so the nut 3 must move tl- in space before reaching the target location.F! There is a similar problem if Natsuto falls off for some reason during that time.

Therefore, if we shorten the distance of this spatial movement, Nat 3
Since the separation distance between the outer shaft 1 and the magnet 4 is short, the magnetic attraction completely disappears and the nut starts to return from the outer shaft 1 at a critical moment, so the nut is sucked by the magnet 4 again, and in the end the nut supply is not completed. Become. If the guide bin 7 is extremely long as shown in Figures 9 and 10,
However, it is impossible to always make the guide bin 7 so long.
The above-mentioned problem must be solved by some positive method.0) Means for solving the problem and its effect The present invention is provided to solve the above-mentioned problem. The supply iron is obtained by a hollow outer shaft and an inner shaft slidably inserted into the hollow outer shaft, a magnet for attracting and holding the parts is provided at the tip of the inner shaft, and a magnet is provided at the tip of the outer shaft to attract and hold the parts. is characterized by having a drive device that forms a protrusion for holding parts and forcibly retreats the inner shaft after the two shafts have advanced to a predetermined position and stopped,
The protrusions on the outer shaft hold the parts, and after both shafts have stopped, only the inner shaft moves back to ensure that the parts are attracted and released.

(E) Embodiment Figure 1 is a side view of the entire device, and Figures up to Figure 7 show the case where a projection nut is supplied to a fixed electrode of a spot welding machine @ a sheet metal part 9 is placed on a fixed electrode 8. , the guide pin 10 of the fixed electrode 8 passes through the sheet metal part 9. 11 is a movable electrode. The component supply device 12 consists of a supply unit 13 and an air cylinder 14. Regarding the supply unit 13, a supply rod 17 is constructed by combining an inner shaft 16 in a slidable manner into a hollow outer shaft 15. As is clear from FIG. 4, the outer shaft 15 has a so-called oval cross-sectional shape, with flat portions 18 and 19 provided at opposing locations, to achieve a rotational locking function described later. A magnet (permanent magnet) 20 is bonded (for example, bonded) to the tip of the inner shaft 16, and the magnet 20 and the end face of the outer shaft 15 are located at a predetermined forward position as is clear from FIGS. 1 and 2. Until it reaches , the projection nut 21 is flush with the surface forming a negative plane, and the projection nut 21 is held there by suction.

Nine regulation pins fixed to the inner shaft 16 have a long hole 231- in the outer shaft 150 stroke direction four Kl+R.
A compression coil spring 24 is interposed between the outer shaft 15 and the inner shaft 16 which penetrates through and further protrudes from the outer shaft 15, and the tension of the knee spring 24 is controlled by a regulating bottle. η
is received by hitting the lower end of the elongated hole 23, and in this state, the lower end surfaces of the magnet 20 and the outer shaft 15 are flush with each other. An outer cylinder 26 houses a supply rod 17f, which is connected by 25, and an air cylinder 14 is fixed to its upper end;
A chute 27 with a diameter of 211:4 is welded to its lower end. By making a circular hole 29 in the upper plate 28 of the chute 27 into which the outer shaft 15 fits snugly, the end of the chute 27 is bifurcated as shown in FIG. It is fixed to the guide plate 31 on the end face, so that the flat part 18 of the outer shaft is in tight contact with the guide plate □ Also, if a gap is created between the circular hole 29 and the flat part 19, the nut 21 Since movement may be hindered, the filling pieces 32 should be welded and brought into close contact with the flat parts 19.The guide plate 31, the filling pieces 32, etc. should be brought into close contact with each flat part 19 and 19. This is done to prevent the outer shaft 15, that is, the supply rod 17 from rotating, and may be brought into contact with both flat parts 18 and 19 as shown in the figure. It is also possible to make contact with either one of the protrusions (t) for holding the distal end part of the actor shaft 15.There are various forms of this protrusion, but here we will use the one shown in Fig. 5. As shown in the figure, a frame-shaped protrusion 54 with a mouth portion 33 on one side is shown as an example.As another type, a bifurcated protrusion (not shown) may also be used depending on the shape of the part. can be adopted.
The nut 21 that has passed through is attracted and smoothly enters the frame of the protrusion.

In order to make the temporary locking of the nut 21 more accurate, opening/closing plates 36, 37 are provided, which are fixed to the bifurcated portion 30 of the chute and pivoted to nine pivots 38, 39. In short, one wing piece of the hinge is 36° 37° and 9%
The other wing piece is fixed plate 40.41 with bolts 42.43
is fixed to the bifurcated portion 30. Pivot $, 39: The assembled helical spring 42' (only the side between the pivots is shown in Figure 6) gives elasticity in the closing direction to the opening/closing plate 36, 37, so that The two-dot chain line in Figure 6 shows the state in which the opening/closing plate has been pushed open.

One of the features of the present invention is that the inner shaft and the outer shaft are integrally advanced to a predetermined position, stopped, and then the inner shaft is forcibly retreated. A driving device for this purpose is attached to the side of the outer cylinder 26. There are also systems such as an electromagnetic solenoid as the driving device, but in this embodiment, an air cylinder 4 is used as the driving device.
5 is adopted, and a retaining piece 47 is fixed to the tip of the piston rod 46. The engagement piece 47 passes through the elongated hole A8t formed in the outer cylinder 26 and extends into the outer cylinder 26, and that part faces the regulation bottle 22 so that it can abut against it. Figure 6 shows nut 21 (9 shown with a two-dot chain line)
has entered the frame-shaped protrusion 34 and is firmly attracted and held by the magnet 20. When the supply rod 17 advances from the air cylinder 14, the nut 21 pushes the opening/closing plate 36.37. Open it and reach the designated place,
At this point, the advance of the supply rod 17 is stopped.@After that, when the air cylinder 45, which is the drive device, operates, the retaining piece 47
Then, the inner shaft 16 is forcibly retreated via the regulating pin η, and the magnet 20 moves to a position where the attraction force against the nut 21 disappears, the nut holding is released, and the other guide pin IQK matches. @
Force the inner shaft 16? 7 and 8, the timing of retraction will be explained. In FIG. 7, the retraction is performed at a place where the guide bin 10 and the screw hole of the nut 21 are very close to each other, which is the most likely. This is the case. The figure fgB shows how to fit the port 49 into the hole 50. In this case, stop the bolt a little before the 49'ft hole mark and then move the inner shaft 16 back to fit it into the port 49'l, 50. This is a depressing behavior.

Note that the compression coil spring 24 installed between the inner shaft 16 and the outer shaft 15 can be omitted if the intake foot 16 can secure the position shown in Fig. gg2 or Fig. 3 under its own weight. 〇(f) Effect According to the invention, since the protrusion formed at the tip of the outer shaft holds the part and the magnet holds the part by suction, it is possible to securely hold one part. Parts do not accidentally shift or come off even when the machine is advancing. @ A drive system in which the inner shaft and outer shaft are integrated and advance to a predetermined location and then forcibly retreat after stopping.FJl Therefore, if the above-mentioned predetermined points are set according to the characteristics of the parts and the mutual knowledge supplier, for example, as shown in factor 7 or Figure 8, the parts cannot be placed in the air in an unstable state. Problems in the prior art can be definitely solved without the need for movement. Furthermore, the retraction length of the inner shaft can be set appropriately depending on the strength of the output of the magnet, and the phenomenon of parts being pulled back again as in the prior art does not occur.

[Brief explanation of the drawing]

Figures 1 to 8 show examples of the present invention. Figure 1 is a side view showing the external appearance of the device, Figure 2 is a vertical side view, Figure 6 is a vertical front view, and Figure 4 is the same as Figure 2. (Analysis-(41 sectional view, the fifth factor is a three-dimensional view, FIG. 6 is a side view of the opening/closing plate, and FIGS. 7 and 8 are partial sectional views showing the transition period of parts supply. FIG. 9 ~
111th is the prior art, FIGS. 9 and 10 are partial sectional views, and FIG. 11 is a plan view. 17... Supply rod, 15... Outer shaft,
16... Inner shaft, 21.49... Parts,
20... Magnet, 64... Protrusion, 44... Drive device. Mr. Aoyama Yoshi Takako 310

Claims (1)

[Claims] The supply rod is composed of a hollow outer shaft and an inner shaft slidably fitted inside the hollow outer shaft.A magnet for attracting and holding parts is provided at the tip of the inner shaft, and a magnet is attached to the tip of the outer shaft to attract and hold the parts. 1. A parts supply device, which is provided with a drive device which forms a protrusion for holding a part, and forcibly retreats the inner shaft after both shafts have advanced to a predetermined position and stopped.