JP2519510B2 - Axial parts supply method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention supplies a shaft-shaped component such as a shaft or a bolt to a predetermined position of a counterpart member, for example, a hole of a steel plate component or a guide hole of a spot welding electrode. It is about how to do it.

(B) Conventional Technique An example of the conventional technique will be described with reference to FIG. 8. A chuck mechanism 2 is attached to the tip of a supply shaft 1 connected to a fluid cylinder (not shown). The bolt 4 is clamped by the claw 3. In this state, when the supply shaft 1 advances and the bolt 4 reaches the target position, the chuck mechanism 2 operates to open the pawl 3 and drop the bolt 4 to complete the supply. Further, in Japanese Utility Model Publication No. 56-14943, a nut attracted to the tip of a magnetic rod is brought into contact with the surface of the material to be welded by the advance of the magnetic rod, and the contact portion is rotated about the fulcrum. It is disclosed to fit in the guide pin.

(C) Problems to be Solved by the Invention In the above-mentioned conventional technique, since the chuck mechanism 2 itself must be provided with an electromagnetic drive device or a drive device such as an air cylinder, the chuck mechanism 2 is complicated. In addition, the size of the claw 3 becomes large depending on the size and shape of the shaft-shaped component. Therefore, it becomes very difficult to supply to a narrow space. In addition, the means of holding the shaft-shaped parts by sandwiching them with the claws can be improved if the size of the claws is slightly different or impurities such as iron scraps are present between the claws and the parts. Since it is a location that requires precision, the holding posture of the parts may be tilted, which hinders correct supply.

On the other hand, in the case of the above-mentioned Japanese Utility Model Publication No. 56-14943, when the nut hits the surface of the material to be welded too strongly, the impact causes the nut to be repelled from the holding surface at the tip of the magnetic rod. Become. On the contrary, when the material to be welded is weakly contacted or is not fully contacted, there is a problem that normal nut rotation cannot be obtained. This is
Unless the contact of the nut with the material to be welded is finely adjusted and the contact name with extremely high precision is always maintained, reliable operation cannot be obtained.

(D) Means for Solving the Problem and Its Action The present invention is provided to solve the above-mentioned problems, and has a form extending from the tip of the supply rod in the longitudinal direction of the supply rod. A shaft-shaped component is held at the tip of the supply rod, and a protrusion that holds the shaft-shaped component from below is provided at the tip of the supply rod. The feed rod is advanced in the horizontal direction, and the feed rod is stopped at a position where the tip of the shaft-like part does not come into contact with the partner member near the predetermined position of the partner member, and the magnetic attraction force to the shaft-like part disappears almost at the same time. By doing so, the upper part of the shaft-shaped component slides down on the inner surface of the projecting piece, and the shaft-shaped component is pivotally erected and dropped to a predetermined position of the counterpart member,
The tip end of the shaft-shaped component does not come into contact with the counterpart member at all, and while the upper part of the shaft-shaped component slides on the inner surface of the projecting piece, the behaviors of rotation and standing are combined and supplied to the target location. In particular, by setting the stop position of the supply rod to be constant, the shaft-shaped component is supplied in a uniform trajectory while sliding on the inner surface of the projecting piece. Then, the shaft-shaped component is stably held on the supply rod also by the positioning action of the projecting piece, and the posture in which the shaft-shaped component extends in the longitudinal direction of the supply rod acts so that the tip end of the shaft-shaped component is projected. While cooperating with the support function of, the rotation is erected and the supply is completed.

(E) Practical Example The example shown in FIGS. 1 to 7 will be described. First,
A shaft-shaped part (hereinafter abbreviated as a part) is indicated by reference numeral 5, and a shaft 7 is provided with a square plate-shaped head 7 as shown in FIG. 3 (A), or as shown in FIG. 3 (B). The head 7 may have a circular shape, or may have a cylindrical shape as shown in FIG.

Referring to FIG. 1, FIG. 2, FIG. 4, FIG. 6, and FIG. 7, a plate-shaped projecting piece 9 for holding the upper part of the component 5 from below is provided at the tip of the supply rod 8. It is provided. The component 5 shown by the solid line in FIGS. 1 and 2 is the head 7.
Is a bolt having. In order to hold this bolt at the tip of the supply rod 8 by the attractive magnetic force, the supply rod 8
Is hollow as shown in the drawing, the inner rod 10 is slidably inserted therein, and a magnet (permanent magnet) 11 is fixed to the tip of the rod 10. The lower end face of the supply rod 8 is matched and is flush with the supply rod 8 as shown. The supply rod 8 strokes obliquely downward or in a substantially horizontal direction. Axial part 5
Is held at the tip of the supply rod 8 so as to extend in the longitudinal direction of the supply rod 8 as shown in FIG.

As an example of the predetermined position of the counterpart member 12, there is a hole 13 formed in the member 12, and here, the bolt 5 is going to be inserted into the hole 13.

FIG. 1 illustrates a position where the head 7 of the bolt 5 is adsorbed to the tip surface of the supply rod 8 and the supply rod 8 has advanced to the vicinity of the mating member 12 and stopped. The tip is located very close to the hole 13, and the bolt tip is not in contact with the member 12. Next, retract the inner rod 10 from the state shown in FIG.
When the magnet 11 is separated from the head 7 as shown in FIG. 2, the attractive magnetic force with respect to the bolt 5 disappears, so that the head 7 is supported by the inner surface of the projecting piece 9 and the entire bolt 5 turns upright. As shown in FIG. 2, it is fitted into the hole 13. In the transitional period of the rotation upright, the head 7 slides down on the inner surface of the projecting piece 9 to change the position of its contact point, and finally falls from the contact state of FIG. 2 into the hole 13. I go in. The above-described rotation behavior is smooth because the axial part is held at the tip of the supply rod in such a manner that it extends from the tip of the supply rod in the longitudinal direction of the supply rod. Favorably causes the pivoting movement.

FIG. 6 is a vertical cross-sectional view showing the entire apparatus for carrying out the method of the present invention, in which the feed rod 8 as shown in FIGS. 1 and 2 is housed in the outer cylinder 14 in a retractable state. Outer cylinder 14
The working cylinder (air cylinder) 15 is connected to the upper end of
Also, a shooter that guides the bolt 5 to the lower end of the outer cylinder 14
16 is welded. The shooter 16 guides the head 7 in a state of hanging the head. A guide plate 17 is fixed to the end of the shooter 16, and a magnet (permanent magnet) 18 embedded in the guide plate 17 serves to attract and introduce the bolt 5.

A mechanism for forcibly retracting the magnet 11 (inner rod 10) as shown in FIG. 2 will be described with reference to FIG. 7. A restriction pin 19 fixed to the inner rod 10 is an elongated hole 20 opened in the stroke direction of the supply rod 8. Projecting outside the supply rod. The drive device 21 is fixed to the outside of the outer cylinder 14. Although an electromagnetic solenoid or the like can be adopted as the drive device 21, the air cylinder 22 is illustrated here, and the engagement piece 24 fixed to the tip of the piston rod 23 has a length in the stroke direction opened in the outer cylinder 14. A hole 25 is passed through to look into the outer cylinder, and that portion is opposed so as to abut against the restriction pin 19. The compression coil spring 26 is inserted between the inner rod 10 and the supply rod 8, and the elastic force thereof is received by the restriction pin 19 being pressed against the lower portion of the elongated hole 20. 27 is the above-mentioned working cylinder
Fifteen piston rods are connected to the feed rod 8.

When the supply rod 8 is advanced by the piston rod 27 from the state shown in FIG. 7 and stopped immediately before the destination, the regulation pin
19 also stops just before the engaging piece 24. Then the air cylinder 22
When the engaging piece 24 is pulled up by the inner rod 10
Is forcibly retracted via the restriction pin 19 as shown in FIG.

The timing at which the attractive magnetic force to the bolt 5 is extinguished is almost the same as the stop of the supply rod 8, and the best timing is immediately after the stop of the supply rod 8.

When the head 7 of the component is square as shown in FIG. 3 (A), it may have a protruding piece shape as shown in FIG. 4, but when it has a disk shape as shown in FIG. It is suitable to provide wall members 28 on both sides of the projecting piece 9 as shown in the figure so as to form a U-shape to prevent the head 7 from rolling. In addition, FIG.
In the case of such a shape, the shape is as shown by the two-dot chain line in FIG.

In the above embodiments, the permanent magnets are used to attract and hold the components, but an electromagnet can be used as another method. Although this example is not shown, the supply rod 8 is passed through the exciting coil to generate a magnetic force at the tip of the rod.

(F) Effect According to the present invention, since the component is magnetically held at the tip portion of the supply rod, it is not necessary to employ a large-sized chuck mechanism having a complicated structure as in the prior art. It is possible to supply parts to narrow spaces.

The shaft-shaped component is held at the tip of the supply rod in such a manner that it extends from the tip of the supply rod in the longitudinal direction of the supply rod, and a protrusion for holding the component from below is provided at the tip of the supply rod. Stop the advancing of the supply rod at a predetermined position of the mating member, for example, a position located very close to the hole,
This is because the magnetic attraction force disappears almost at the same time, so that the part rotates while standing in contact with the inner surface of the protruding piece and stands up, thereby keeping the behavior locus of the part constant and improving the supply accuracy to the target location. Make sure. This longitudinal direction is derived from the characteristic of a shaft-shaped part having a certain length.

It is very important that the tip of the shaft-shaped component stops at a predetermined position without contacting the mating member, and the upper part of the component slides down on the inner surface of the projecting piece, and the turning and standing behaviors are combined. Then, the supply is made. This means that no external force acts on the parts, so if the relative position between the parts and the supply rod is always kept constant and the stop position of the supply rod is controlled to be constant, the stop tip position of the part will be This means that it can be set in the best position. Then, the fact that the upper part of the component slides down on the inner surface of the protrusion means that the component is rotated and erected from the protrusion of the supply rod stopped at a predetermined position as a starting point. The rotation standing is always realized as a uniform behavior locus, and the reliability of supply is significantly improved. That is,
All the problems described in the section of the prior art due to the contact between the component and the counterpart member are solved.

[Brief description of drawings]

FIGS. 1 to 7 show an embodiment of the present invention, and FIGS. 1 and 2 are vertical side views of a local portion, and FIGS. 3 (A), (B) and (C).
Are three-dimensional views, FIGS. 4 and 5 are three-dimensional views of the tip of the supply rod, FIG. 6 is a vertical side view of the entire apparatus, FIG. 7 is a partial vertical side view of the apparatus, and FIG. It is a side view of an example. 8 ... Supply rod, 5 ... Shaft-shaped part, 9 ... Projection piece, 12 ...
… Counterpart member.

Claims (1)

(57) [Claims] 1. A projecting piece for holding a shaft-shaped component at the tip of the supply rod in such a form as to extend from the tip of the supply rod in the longitudinal direction of the supply rod, and for holding the shaft-shaped component from the lower side at the tip of the supply rod. Provide the feed rod with the tip of the feed rod attracted and held by magnetic force to advance the feed rod diagonally downward or in a substantially horizontal direction, and the tip of the feed rod does not come into contact with the mating member near the predetermined position of the mating member. The supply rod is stopped at the position, and the magnetic attraction force to the shaft-shaped part is eliminated almost at the same time as the stop, so that the upper part of the shaft-shaped part slides down on the inner surface of the projecting piece to rotate the shaft-shaped part to stand up. A method for supplying a shaft-shaped component, which comprises dropping the member to a predetermined position.