JPH07328773A - Method for inserting parts to fixed electrode and feeding member therefor - Google Patents

Abstract

PURPOSE:To correctly feed parts to the end part of a receiving hole in a device to feed the parts in the receiving hole of a fixed electrode. CONSTITUTION:In an inserting method, a part 1 is held by a feeding member 12, and the feeding member 12 is moved to the point where a part of the part 1 is advanced into a receiving hole 30, the part 1 is forcibly projected in this condition to completely insert the parts into the receiving hole, and the feeding member is returned to the position to receive the part. The feeding member 12 used in this method is provided with a recessed part 15 to store the part, a magnet 18, an air injection port or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the field of inserting a component into a receiving hole of a fixed electrode in projection welding or the like.

[0002]

2. Description of the Related Art As a conventional technique for inserting a shaft-shaped component such as a projection bolt into a receiving hole of a fixed electrode, the bolt is held by a means such as a chuck mechanism and the bolt is inserted into the receiving hole of the fixed electrode. It is known to insert and release the chuck function. Further, there is also known one in which the bolt that has passed through the inside of the guide tube is directly guided into the receiving hole.

[0003]

In the case of the above-mentioned chuck method, it is useful if the chuck is released and the parts are moved into the receiving hole by their own weight after the chuck is released. However, if the receiving hole is opened horizontally or diagonally, there is a problem that the parts do not go all the way into the receiving hole. Further, in the above guide tube system, the relative position of the guide tube and the receiving hole is likely to be misaligned, and therefore,
There is a problem that parts do not smoothly enter the receiving hole.

[0004]

Means for Solving the Problem and Its Action The present invention is provided to solve the above-mentioned problems.
According to a first aspect of the present invention, a part of the component held by the supply member is moved into the receiving hole of the fixed electrode by moving the supply member, and the component is forcibly protruded from that position to be completely inserted into the receiving hole. ,
A method of inserting a component into a fixed electrode, characterized in that the supply member is returned to the component receiving position, and the component that has been inserted halfway through the receiving hole is forcibly separated / projected from the holding member. Of. According to a second aspect of the present invention, in the first aspect, the component is held in the supply member by a magnetic force, and the component is forcibly projected by air ejection against the magnetic force. In addition, a strong air jetting force is applied to the part of which the part of the receiving hole has entered, so that the part is forcibly separated / projected from the holding member. According to a third aspect of the present invention, in the first aspect, the component is held in the supply member by the air suction force by the vacuum, and the component is forcibly projected by converting the vacuum into the air jet and the component is fixed to the fixed electrode. Is a method of inserting
A part of the component held by the air suction force is inserted into the receiving hole, and then the vacuum is switched to air ejection to forcibly separate / project the component from the holding member. According to a fourth aspect of the present invention, there is provided a supply member used in the method of the first aspect, wherein the guide member has a recess for accommodating a part of a component, a magnet installed at the bottom of the recess, and air opening at the bottom. A supply member for inserting a component into a fixed electrode, characterized in that the component is accommodated by a concave portion of the guide member, and is provided at the bottom of the concave portion. When a part of the part enters into the receiving hole after being sucked toward and holding the part,
Parts are forcibly separated and projected by the air jet,
This allows the part to completely fill the receiving hole.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Explaining the embodiments of FIGS. 1 to 5, the object part here is a projection bolt 1 made of iron, which mainly comprises a shaft portion 2 and a flange 3 which is integral with the shaft portion 2. The flange 3 is provided with a projection 4 for welding. The supply rod 5 is housed in the guide tube 6, and an advancing / retreating stroke is made by an air cylinder 7 connected to the end portion thereof. Guide tube 6
A triangular base plate 8 is welded to and a piston rod 10 of an air cylinder 9 is connected to the upper part thereof, and the air cylinder 9 is firmly fixed to a stationary member 11. By using the triangular base plate 8 in this way, the guide tube 6 is installed in an inclined posture, and the supply rod 5 also advances obliquely downward with this. The air cylinder 9 is attached so that it can be moved back and forth in the vertical direction.

Explaining the supply member 12 installed at the tip of the supply rod 5, a cylindrical guide member 14 is welded to a thick plate-shaped main body 13, and a recess 15 for accommodating a part of the bolt 1 is formed therein. Has been done. A receiving plate 16 with which the flange 3 is in close contact is formed inside the guide member 14, and an air ejection port 17 is opened in the center thereof. A magnet (here, a permanent magnet) 18 is installed on the upper side of the receiving plate 16, that is, on the bottom of the recess 15. The magnet has an annular shape, and the hole portion at the center thereof communicates with the air ejection port 17. There is. An air passage 19 is opened from the main body 13 to the supply rod 5, and an air hose 20 is connected to it. In order to make the attraction force of the magnet 18 act more strongly on the bolt 1, the main body 13, the guide member 14, etc. are made of non-magnetic stainless steel.

The component supply pipe 21 extends from a parts feeder (not shown), and its tip is located immediately near the guide member 14 in the retracted position.
A support cylinder 22 is welded to the component supply pipe 21, to which an air cylinder 23 is fixed, and a piston rod 24 of the air cylinder 23 is connected to a stopper piece 25. The illustrated stopper piece 25 is in a state of advancing into the component supply pipe 21, and once the bolt 1 conveyed by high pressure air is received by the stopper piece 25 and then the stopper piece 25 is retracted by the air cylinder 23, Bolt 1 is now slowly air-conveyed, so that bolt 1 receives back plate 1 at an excessive speed.
It prevents you from crashing into 6. Reference numeral 26 is a narrow slit that allows the shaft 2 to pass therethrough, and the air cylinder 23 is also connected to the guide tube 6 via a bracket 27.

The fixed electrode 28 is arranged coaxially with the movable electrode 29, and a receiving hole 30 for a component is opened in the central portion. In the illustrated case, the steel plate component 31 is placed on the fixed electrode 28, and the through hole 32 of the steel plate component 31 is aligned with the receiving hole 30. A magnet (here, a permanent magnet) 33 is fixed to the inner portion of the receiving hole 30, and the attraction force can assist the protrusion of components described later.
3 may be discontinued if necessary. For example, if the receiving hole 30 is in the vertical direction as shown in the figure, air ejection is sufficient.

In order to realize the operation described later, air supply / discharge control for each air cylinder and an electrically operated control valve necessary for the air supply / discharge control are adopted, but these are generally adopted. Since it can be easily carried out by the method, the explanation is omitted here. Further, illustration of air hoses connected to each air cylinder is also omitted.

The operation of the above embodiment will be described. FIG. 1 shows a state in which the bolt 1 is attracted to the receiving plate 16 by the magnet 18, and from this state, the supply rod 5 advances and the shaft portion 2 advances. Stops at the location where it is coaxial with the receiving hole 30,
After that, air is ejected from the through hole 17 at the position where the tip of the shaft portion 2 enters the receiving hole 30 by the operation of the air cylinder 9, and the projecting force overcomes the attraction force of the magnet 18 and the bolt 1 It is forcibly separated from and projected from the supply member 12. When the bolt 1 is completely inserted into the receiving hole 30 in this manner, the supply member 12 is retracted to prepare for the next operation.

When the bolt 1 is projected from the state where a part of the shaft portion 2 is in the receiving hole 30, the supply member 12 is provided.
The behavior of itself can be realized in the following three modes. That is, in the case of FIG. 2, when the supply member 12 is moving toward the fixed electrode 28 as indicated by the arrow 34, air is ejected as indicated by the arrow 35. In the case of FIG. 3, after the supply member 12 has stopped, air is ejected as indicated by the arrow 35. Further, in the case of FIG. 4, the supply member 1
When 2 is moving away from the fixed electrode 28 as indicated by arrow 36, air is ejected as indicated by arrow 35. These three aspects relate to, for example, shortening the operating cycle of equipment. Then, when the complete insertion of the component is completed, the supply member is returned to the position where the component is received, that is, the position closest to the component supply pipe.

FIGS. 6 and 7 show the case where the holding means for holding the parts in the supply member 12 is of a chuck mechanism type, and specifically, a leaf spring is adopted. That is, the axial groove 37 is formed on the inner surface of the guide member 14,
The leaf spring 38 is fixed therein with a rivet 39, and the free end thereof is slightly projected from the groove 37 to elastically contact the outer peripheral portion of the flange 2. Such a leaf spring has a circumferential direction. 3 or 4 are installed at equal intervals. Also in this case, the component 1 is pushed out by the air ejection from the air ejection port 40 in the same manner as the embodiment of FIG.

The embodiment shown in FIGS. 8 and 9 is basically the same as that shown in FIG. 1. Members having the same functions are designated by the same reference numerals and detailed description thereof is omitted. . This is formed by forming a recess 15 in the main body 13 itself, and an air ejection port 17 is opened therein, and the supply member 12 is adapted to stroke in a direction orthogonal to the axis of the fixed electrode 28. The bolt 1 is held by vacuum, that is, suction force by air suction.
On the other hand, when separating and projecting, the compressed air is ejected from the air ejection port 17 conversely. In this embodiment, the guide tube 6 is formed with a split groove 41, and the air hose 20 is configured to pass through the split groove 41.
Since the operation of this embodiment can be easily understood from the operation of that of FIG. 1, detailed description is omitted.

The embodiment shown in FIG. 10 is different from that shown in FIG. 8 only in the means for projecting the parts. Here, a method of ejecting the parts electromagnetically is adopted, and the central portion of the upper surface of the main body 13 is adopted. The projecting plunger 42 is installed in the above, and the projecting plunger 42 is passed through the exciting coil 43 attached to the upper surface of the main body 13. When the exciting coil 43 is energized, the projecting plunger 42 advances with great force to receive the component 1 in the receiving hole 3
It hits within 0.

[0015]

[Effect] According to the present invention, the part is forcibly projected in a state where a part of the part is inserted into the receiving hole of the fixed electrode.
It realizes correct welding. Further, since the projecting force is applied to the component after a part of the component is inserted into the receiving hole, the mistaken insertion of the component as in the above-described conventional technique can be completely prevented. By holding the component in the supply member with magnetic force, a constant holding force can be always obtained, and since the jet force imparts a thrust force exceeding the attracting magnetic force by ejecting air, the component can be reliably projected. Since the components of the supply member are held by vacuum and the protrusion of the components is performed by ejecting air, the components can be supplied to the fixed electrode only by supplying / discharging air, which is extremely advantageous for simplifying the structure. Since the supply member is provided with the concave portion and holds the component with the magnet, the stable holding of the component in the concave portion is realized. Further, since the air is sprayed to the component in the recess, the air does not disperse, the component efficiently acts, and a strong protrusion of the component is obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a schematic vertical sectional side view showing an operating state.

FIG. 3 is a schematic vertical sectional side view showing an operating state.

FIG. 4 is a schematic vertical sectional side view showing an operating state.

5 is a top view of the supply member of FIG. 1 seen from below.

FIG. 6 is a partial vertical cross-sectional side view showing another embodiment.

FIG. 7 is a plan view showing a part of FIG.

FIG. 8 is a vertical side view showing another embodiment.

9 is a front view showing a part of FIG. 8. FIG.

FIG. 10 is a partial vertical cross-sectional side view showing another embodiment.

[Explanation of symbols]

 12 Supply Member 1 Component 28 Fixed Electrode 30 Receiving Hole 15 Recess 14 Guide Member 18 Magnet 17 Air Jet

Claims (4)

[Claims] 1. A part of the component held by the supply member is inserted into the receiving hole of the fixed electrode by moving the supply member, and the component is forcibly projected from that position to be completely inserted into the receiving hole. , A method of inserting a component into a fixed electrode, wherein the supply member is returned to the receiving position of the component. 2. The method of inserting a component into a fixed electrode according to claim 1, wherein the component is held by the supply member by a magnetic force, and the component is forcibly projected by air ejection against the magnetic force. . 3. The fixed electrode according to claim 1, wherein the supply member holds the component by an air suction force by a vacuum, and converts the vacuum into an air jet to force the component to project. How to insert. 4. A supply member used in the method of claim 1, wherein the guide member has a recess for accommodating a part of the component, a magnet installed at the bottom of the recess, and air opening at the bottom. A supply member for inserting a component into a fixed electrode, which is provided with a jet port.