JPH0764419B2 - Method and device for supplying shaft-shaped component with head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention is used in a field in which a shaft-like component with a head such as a projection bolt is inserted into a target location, for example, a guide hole of a fixed electrode. In particular, the emphasis is placed on correctly determining the initial posture of the headed shaft-shaped part.

(B) Conventional technology No conventional technology that accurately corresponds to the present invention has been found within the scope of my research. However, although the target part is a projection nut, there is a "Procedure nut supply method" in my application (Japanese Patent Application No. 62-262488) dated October 16, 1987.

This is a type in which a projection rod nut is magnetically attracted to and held by a supply rod, and the tip of the protrusion rod of the supply rod is turned over.

(C) Problems to be Solved by the Invention If the above-described prior art is applied to a shaft-shaped part with a head such as a projection bolt, an abnormal holding state as shown in FIG. 13 is obtained. That is, the supply rod 1 is supported by a guide cylinder 2 so as to be able to move back and forth, and a guide plate 3 is welded to the guide cylinder 2 to hold a shaft-shaped component (hereinafter simply referred to as component) 4 by suction. A magnet (permanent magnet) 5 is attached for this purpose. At the tip of the supply rod 1, there is formed a projecting piece 7 for holding the head 6 of the equipment from below. Further, the supply rod 1 has a hollow structure,
An inner rod 8 is inserted therein, and a magnet (permanent magnet) 10 for bringing the head 6 into close contact with the lower end surface 9 of the supply rod is attached to the tip end portion thereof.

Even if the technique described in item (b) is applied to the headed shaft-shaped component as described above, the component 4 has a large gap between the component 4 and the lower end surface 9 as shown in the figure for some reason, and the axis of the component 4 And the axis of the supply rod 1 are not located on a straight line,
After all, the initial holding posture of the component 4 is not set correctly. If the parts are held as shown in FIG. 13, the parts 4 will be disengaged from the supply rod 1 when the supply rod 1 advances, or will not be correctly supplied to the target part of the counterpart member. Then there arises a problem. Some of the causes described above are that the attraction force of the magnet 10 is mainly decreased and the attraction force of the other magnets 5 is increased.

(D) Means for Solving the Invention and Its Action The present invention is provided to solve the problems described above, and comprises two inventions of a supply method and an apparatus thereof.

That is, the supply method according to the first aspect of the invention comprises a stopper part for receiving the head of the shaft-shaped component and a support part with which the shaft part of the component comes into contact with the tip of the supply rod, and the protrusion located on the lower side of the component. Provided, the head is attracted to the tip of the feed rod by magnetic force, and the feed rod is advanced obliquely downward or in a substantially horizontal direction, the feed rod is stopped immediately before the target point, and the attraction force to the head is attracted almost simultaneously with the stop. By extinguishing, the head slides on the inner surface of the projecting piece and the shaft-like component rotates upright and is dropped to a predetermined position of the counterpart member. While contacting, the rotational force at the time of rotation is received, and the whole part of the component rotates and stands up, and then detaches / falls from the projecting piece.

On the other hand, the supply device according to the second aspect of the present invention includes a stopper part for receiving the head of the shaft-shaped component and a support part with which the shaft of the component is in contact with the tip of the supply rod that advances or retracts obliquely downward or substantially horizontally. Is provided on the lower side of the supply rod, and the supporting portion is deformed so that the contact portion with the shaft portion is displaced to the shaft portion side from the stopper portion. It is characterized in that a magnet for adsorbing the magnet is installed, and a mechanism for separating the magnet from the shaft-shaped component to eliminate the magnetic force to the shaft-shaped component is provided, and the operation like the above-described method is exhibited.

(E) Embodiment Referring to the embodiment shown in FIGS. 1 to 6, the feed rod 11 for moving forward and backward is arranged obliquely downward or in a substantially horizontal direction as shown in FIG.
A shaft-shaped component including 12 and a shaft portion 13 (hereinafter abbreviated as component)
14 is attracted by magnetic force.

There are several possible methods for applying magnetic force to the supply rod 11 for holding the parts and for making it disappear arbitrarily. In Fig. 1, the supply rod 11 has a hollow structure, and the inner part is A type in which the shaft 15 is slidably inserted is shown. A magnet (permanent magnet) 16 is fixed to the tip of the inner shaft 15, so that the supply rod 11 and the magnet 16 are aligned on one plane to form a head.
It forms 12 contact surfaces.

A regulation pin 17 is fixed to the inner rod 15 and protrudes to the outside from a long hole opened in the stroke direction of the supply rod 11. A compression coil spring 19a is interposed between the inner rod 15 and the supply rod 11, whereby a tension in the pushing direction is applied to the inner rod 15, and this is a restriction pin 17
By hitting the lower end of the long hole 18, the position state as shown in FIG. 1 is set.

The entire supply rod 11 is housed in the outer cylinder 19, and the piston rod 21 of the air cylinder 20 connected to the outer cylinder 19 is supplied to the outer cylinder 19.
Combined with 11. A shutter S that guides the component 14 in a suspended state is welded to the lower end of the outer cylinder 19, and the guide plate 22 of the supply rod 11 is also welded to the lower end of the outer cylinder 19. A magnet (permanent magnet) 23 is fixed to the guide plate 22 at the position shown in order to draw the component 14 from the shutter S to a predetermined position. A drive device is provided on the outer surface of the outer cylinder 19.
24 is installed. Although there is also a system such as an electromagnetic solenoid as a drive device, an air cylinder 25 is used here, and an engagement piece 27 connected to the piston rod 26 penetrates a long hole 28 opened in the stroke direction of the outer cylinder 19. Outer cylinder 19
Protruding inside. The relative position of the engagement piece 27 and the restriction pin 17 is set so that they can collide with each other after the stroke. The means for arbitrarily eliminating the magnetic force of the supply rod 11 is
As described above, several methods are conceivable, one of which is as described above, and the mechanism included therein, which separates the magnet from the shaft-shaped component and eliminates the magnetic force to the shaft-shaped component, is As can be understood from the operation description below, the air cylinder 25, the piston rod 26, the engaging piece 27,
It is formed by combining movable members such as the restriction pin 17 and the inner rod 15.

A projecting piece 29 for holding the upper portion of the component 14 from below is provided at the tip of the supply rod 11. As is apparent from FIGS. 2 to 6, the protrusion has a bent V shape, and a support portion for contacting the stopper portion 30 for receiving the head 12 and the shaft portion 13 is provided. It consists of 31 and. As shown in the figure, the support portion 31 has a contact portion 33 for the shaft portion 13 and a stopper portion 30
It is deformed to a position displaced toward the shaft portion 31 side. It is also appropriate to provide side plates 32 on the right and left sides of the projecting piece 29 as shown in FIG. 5 to form a "U" -shaped receiving shape.

The operation of the apparatus shown in FIG. 1 will be described. When the supply rod 11 sucking and holding the component 14 advances to a predetermined position by the output of the air cylinder 20 and stops, the regulating pin 17 comes close to the engaging piece 27, and the air cylinder 25 works here. The joint piece 27 rises and its displacement is restricted by the regulation pin 17, inner rod.
When the magnet 16 is transmitted to the magnet 15, the magnet 16 is separated from the head 12 so that the attractive magnetic force to the component disappears.

The process in which parts are dropped after being demagnetized is the behavior shown in Figs. 2 to 4, and Fig. 2 shows the state in which the head 12 is in close contact with the end surface of the supply rod without the magnetic attraction force disappearing. At this time, the tip corner portion of the support portion 31 is prevented from coming into contact with the shaft portion 13 at the position of the reference numeral 33 and attempting to assume an abnormal posture as shown in FIG. When the attractive magnetic force is eliminated, the head 12 draws a behavior locus that is a combination of sliding the inner surface of the stopper portion 30 and rotating counterclockwise around the contact point 33. . FIG. 3 shows the initial stage of the behavior, and FIG. 4 shows the head 12 being detached from the support 31 and falling.

The mating member in this embodiment is shown at 34,
The predetermined portion is the hole 35 and corresponds to, for example, the lower electrode of the projection welding machine.

In FIG. 7, the head 12 is a disk-shaped part, and in such a case, it is appropriate to make the surrounding shape as shown in FIG.
Further, FIG. 8 shows the case where the head 12 is square, and in such a case, only the projecting piece 29 as shown in FIG. 10 may be used.

The device shown in FIG. 9 has a guide plate 22 with the magnet shown in FIG.
The magnetic force retention for the component 14 is eliminated by retreating the component. Only the points different from the case of FIG. 1 will be described. The guide plate 22 in which the magnet 23 is integrated is slidable in the stroke direction on the outer surface of the supply rod 11, is integrated with the inner rod 15 by the bolt 36, and is arranged in the stroke direction of the supply rod 11. The bolt 36 passes through the opened long hole 37. Although the magnet is not installed on the inner rod 15, it may be installed as shown in FIG. 1 depending on the weight of parts and the balance between the head and the shaft.

The projecting piece 29 described so far has a "V" shape, but in the case of FIG. 11, a supporting piece 38 made of another member is welded to the straight stopper portion 30 in a substantially right angle direction. . The support piece 38 corresponds to the support portion 31 described above.

Further, in the above embodiment, the case where the permanent magnet is used to attract and hold the component is shown in FIG. 12, but the supply rod 11 is passed through the exciting coil 39 by the electromagnet.

(F) Effects According to the present invention, first of all, as the method invention, the component is transferred to a predetermined position while the magnetic force is retained in the correct posture by the projecting piece having the supporting portion, and the posture of the component at the position closest to the target point Is always constant and drops from the stopped state of the parts while rotating and standing up as described above, so that the behavior loci of the parts are uniform and high reliability without supply errors can be obtained.

Further, as the apparatus invention, it is needless to say that the highly practical behavior of the parts as described above is realized, but a projecting piece having a special shape is installed in the supply rod, and the presence or absence of the attraction magnetic force is controlled. Therefore, it can be carried out in a space that is incomparable to that of a supply rod equipped with a chatter mechanism at its tip (not shown), and parts can be supplied to a narrow space. Also, as a very important effect, since the projection has a special shape in which the support portion is displaced toward the shaft portion, the shaft-shaped component is supplied without any contact with the counterpart member that is a stationary member. Therefore, the relative position between the shaft-shaped part and the tip of the feeding rod remains normal, and the feeding accuracy with respect to the intended point of feeding is significantly improved.

[Brief description of drawings]

1 is a vertical side view, FIGS. 2 to 4 are side views showing changes in operating state, FIG. 5 is a plan view, and FIG. 6 is a sectional view taken along line (6)-(6) of FIG. 7 and 8 are three-dimensional views showing examples of parts, FIG. 9 is a vertical side view, and FIG. 10 is a three-dimensional view.
11 is a side view, FIG. 12 is a side view, and FIG. 13 is a vertical side view. 11 …… Supply rod, 14 …… Shaft part, 12 …… Head, 30
...... Stopper part, 13 ...... Shaft part, 31 ...... Support part, 29 ...... Projection piece, 16,23 ...... Magnet, 39 ...... Excitation coil, 34 ......
Counterpart member, 35 ... predetermined location, 33 ... contact location.

Claims (2)

[Claims] 1. A tip of a supply rod, which comprises a stopper portion for receiving a head of a shaft-shaped component and a support portion with which the shaft portion of the component comes into contact, and a protrusion located below the component, the tip of the supply rod being provided. While the head is attracted and held magnetically to the part, the feed rod is advanced obliquely downward or in a substantially horizontal direction, the feed rod is stopped immediately before the target point, and the attraction magnetic force to the head is extinguished almost simultaneously with the stop, While the head slides on the inner surface of the projecting piece, the shaft-like parts turn upright,
A method of supplying a shaft-shaped component with a head, characterized in that the head component is dropped onto a predetermined portion of a counterpart member. 2. A stopper part for receiving a head of a shaft-shaped component and a support part with which the shaft part of the component comes into contact with the tip of a supply rod which moves obliquely downward or in a substantially horizontal direction, and is positioned below the component. In addition, the supporting part is deformed so that the contact part with the shaft part is displaced to the shaft part side from the stopper part, and the magnet for adsorbing the shaft-shaped part is attached to the tip part of the supply rod. An apparatus for supplying a shaft-shaped component with a head, which is installed and is provided with a mechanism for separating the magnet from the shaft-shaped component to eliminate a magnetic force to the shaft-shaped component.