JP3148846B2 - Supply member for inserting projection bolts into supply rods, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a projection
This the receiving hole provided in the feed rod or welding electrode belt
Is used in the field of inserting bolts .

[0002]

2. Description of the Related Art As a prior art of the present invention, there is Japanese Patent Application Laid-Open No. Hei 4-270075 (reference number T-295) in which my invention is described. It has been disclosed. The prior art will be described with reference to these figures. A parts feeder (not shown)
A flexible component supply hose 1 extending from the component supply tube 2 is connected to the component supply tube 2. The guide tube 4 is welded to the bracket 3 welded to the component supply tube 2, and the sub-supply rod 5 penetrates inside the bracket 3 in a state in which the guide tube 4 can move forward and backward. Thereby, the sub-supply rod 5 can be moved forward and backward. The air cylinder 7 is firmly fixed to the stationary member 8, and its piston rod 9 is connected to the bracket 3 so that the component supply pipe 2 and the sub-supply rod 5 can integrally move forward and backward. The reciprocating direction is parallel to the reciprocating axis of the main supply rod described later.

[0003] A means 11 for holding the part 10 in a fixed position is provided on the sub-supply rod 5. The component 10 here is a projection bolt, and the shaft portion 12 and the flange 1
3 and a projection 14 for welding.
Although various specific structures are conceivable, here, the case where the magnet 16 is incorporated in the mounting plate 15 integrated with the sub-supply rod 5 is illustrated. The auxiliary supply rod 5 has a posture inclined at about 45 degrees with respect to the vertical line as shown in FIG.
Is set in a horizontal state, a concave portion 17 provided on the mounting plate 15 is opened on the right side as shown in FIGS. 11 and 12, and an arc portion 18 matching the circular flange 13 is provided on the left side. is there. A magnet 16 is buried in the mounting plate 15 at a position offset toward the arc portion 18, so that the outer peripheral portion of the flange 13 exactly matches the arc portion 18. Here, the magnet 16 is a permanent magnet, and in order to make the magnetic force act more strongly on the component 10, the sub-supply rod 5, the mounting plate 15, the component supply pipe 2, etc. are made of stainless steel, which is a non-magnetic material. It is made using. The component supply pipe 2 is provided with a notch 19 for allowing the shaft portion 12 to pass therethrough.

The main supply rod 20 is connected to a piston rod 22 of an air cylinder 21, and the air cylinder 21 is firmly fixed to the stationary member 8. Main supply rod 2
The 0 reciprocating axis 23 is arranged in the vertical direction, and the reciprocating axis 24 of the sub-supply rod 5 and the axis 23 intersect at an acute angle. The main supply rod 20 is provided with a component receiving hole 25 in which a means 26 for holding the component is provided. Means 26 Keru it here is realized by a magnet (permanent magnet) 27 is fixed to the deepest portion of the receiving hole 25 as shown.

[0005] The counterpart part 28 has a concave portion 29,
The component 10 is inserted into the concave portion 29, that is, into the target position. Although an air hose of working air is connected to each air cylinder, it is not illustrated here, and a sensor for sequence operation and an air switching control valve can be implemented by well-known means. Is omitted.

The operation of the above conventional example will be described.
FIG. 11 shows the standby state at the position where the main and sub supply rods 20 and 5 are most retracted, respectively. When the component 10 is supplied to the component supply pipe 2, the flange 13 is fitted into the concave portion 17 while being attracted by the magnet 16, and the outer peripheral portion of the flange 13 exactly matches the arc portion 18. As a result, the component 10 is correctly positioned on the mounting plate 15, and as a result, the component 10
Will be held. Next, the sub-supply rod 5 moves forward and stops where the shaft 12 of the component 10 coincides with the reciprocation axis 23, and subsequently the air cylinder 7 operates to move the sub-supply rod 5 along the reciprocation axis 23. As it rises, the shaft 12
Enters the accommodation hole 25, and the component 10 is held toward the main supply rod 20. Thereafter, the sub-supply rod 5 descends along the advance / retreat axis 23, and further retreats obliquely upward, as shown in FIG.
1 Return to the position shown by the solid line. Next, the main supply rod 2
When 0 goes down and the flange 13 is pushed into the concave portion 29, the component supply is completed, and the main supply rod 20 returns to the position shown by the solid line. Note that the attractive force of the magnet 27 is set to a value higher than that of the magnet 16, and the component 10 remains in the accommodation hole 25 when the sub-supply rod 5 descends. Further, although not shown in detail, the component supply pipe 2 may be fixed to a stationary member, and only the auxiliary supply rod 5 may be advanced and retracted along the advance and retreat axis 23 by the air cylinder 7.

[0007]

SUMMARY OF THE INVENTION Problems to be Solved by the Invention
Japanese Patent Laid-Open No. 75 discloses the above technology, but this has the following problems. That is,
The attraction force of the magnets 16 and 27 with respect to the component 10 is set to be stronger than that of the magnet 27, and the component 10 remains in the accommodation hole 25 when the mounting plate 15 retreats along the axis 23. be only ensured the previous SL residual strength of the magnets is poor in reliability, for example, the accommodation hole 25 something like or impurities in is clogged, part 10 containing hole 25
There is a problem that it returns together with the mounting plate 15 without remaining in the inside. Therefore, the mounting plate 15 is moved to the left in FIG. 11 (disclosed by the air cylinder 31 and the arrow 30 in FIG. 4 of the same publication) while the component 10 is kept inserted in the accommodation hole 25. There is a method in which the component 10 is forcibly left in the accommodation hole 25. However, such a method requires a new mechanism for movement, and the mechanism becomes complicated and the scale becomes large. It cannot be said.

[0008]

[Means for Solving the Problems and Their Functions] The present invention has been provided to solve the problems described above.
Claim 1 is a project comprising a shaft portion and a circular flange.
Is the subject of the supply
Insert the projection bolt shaft held by the member
Type where the feeding member is moved and inserted into the receiving hole of the feeding rod
The supply member is a projection bolt
Guide member having a circular recess for accommodating a part
And formed on the inner peripheral portion of the guide member.
An annular projection with which the circumference of the flange engages, and a bottom of the recess;
The magnet installed in the section and the air outlet opening at the bottom
The projection bolt is in a state in which a part of the projection bolt is housed by the recess of the guide member, and further, the component is held by being attracted to the bottom of the recess by the magnet, and the projection is performed. Bo
When a part of the bolt enters the insertion hole,
The projection bolt is forcibly separated and protruded, whereby the shaft of the projection bolt completely enters the receiving hole . In the transitional period of the protrusion, the circular recess acts like a cylinder,
The flange of the injection bolt acts like a piston
The projection bolts are definitely pneumatically pushed
It is done. The flange receives the attractive force of the magnet.
And firmly engaged with the projection.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiment of FIGS. 1 to 5 will be described first. This embodiment is an improvement of FIG. 11, and only the points different from those of FIG. 11 will be described.
Members that perform the same functions as one member are denoted by the same reference numerals. It should be noted that the names of the portions are changed to the receiving holes 25 for the receiving holes 25 and the supply members 15 for the mounting plate 15. Further, the main supply rod corresponds to the supply rod 20 in the present invention. Then, the component 10
It is a projection bolt, which is clear from the shaft 12 and FIG.
It has a circular flange 13 so as to be easy. Supply member 15 coupled to the distal end of the auxiliary feed rod 5 is a member of the wall thickness of the block-shaped as shown, is integrated in the supply member 15 in a short cylindrical Kaido member 32 threaded portion 33, the guide member A circle for accommodating a part of the component 10 in 32
A concave portion 34 having a shape is formed. An annular projection 35 is provided on the inner peripheral portion of the guide member 32, and the flange 1
3 are engaged with each other, and a magnet (here, a permanent magnet) 37 is embedded in the bottom 36 of the concave portion 34 and is covered with a protective plate 38. The magnet 37 is preferably annular, and has an air outlet 39 formed in the center thereof, which communicates with an air passage 40 opened in the supply member 15. The air passage 40 opens on the outer surface of the supply member 15, and a flexible air hose 41 is connected to the supply passage 15, and the hose follows the movement of the supply member 15. FIG. 1 shows a case where the supply rod 20 is a movable electrode of a projection welding machine, and a fixed electrode paired with the supply rod 20 and a steel plate component mounted thereon are not shown. Note that the supply member 15, the guide member 32, the protection plate 38, and the like are made of a nonmagnetic material, stainless steel, in order to make the magnetic force acting on the iron component 10 stronger.

FIG. 1 shows a projection from a component supply pipe 2 to a projection.
After the bolt 10 is supplied into the concave portion 34, the sub-supply rod 5 advances and the shaft portion 12 matches the advance / retreat axis 23, and the flange 13 receives the attractive force of the magnet 37, and 35 is firmly engaged. Then, flop
The order in which the projection bolt 10 is completely inserted into the receiving hole 25 will be described. The supply member 15 is moved along the advance / retreat axis 23 by the operation of the air cylinder 7, and a part of the shaft 12 is inserted into the receiving hole 25. At the entrance to the air outlet 3
Compressed air is ejected from the projection 9 to forcibly separate and project the projection bolt 10 from the magnetically attracted state. Then, the shaft portion 12 further enters while being guided by the receiving hole 25, enters completely, and is then suction-held by the magnet 27. At this time, since the concave portion 34 functions as a cylinder and the flange 13 functions as a piston, the projection bolt 10 is reliably pushed out by the air fluid.

When the projection bolt 10 is protruded from a state in which a part of the shaft portion 12 has entered the receiving hole 25, the behavior of the supply member 15 itself can be realized in the following three forms. That is, in the case of FIG. 2, when the supply member 15 is moving toward the movable electrode 20 as indicated by an arrow 42, air is ejected as indicated by an arrow 43. In the case of FIG. 3, after the supply member 15 stops, air is blown out as indicated by an arrow 43. In addition, FIG. 4
In the case of (1), the supply member 15 is
When the vehicle is moving away from zero, air is ejected as indicated by arrow 43. These three aspects relate to shortening the operation cycle of the equipment and the like. And the shaft part 12
After full insertion is complete, the supply member 15 Purojekushi
The component bolt is returned to the receiving position, that is, the position immediately adjacent to the component supply pipe 2.

FIG. 6 and FIG.
This is a case in which the holding means of the projection bolt 10 is of a chuck mechanism type, and specifically employs a leaf spring. That is, an axial groove 45 is formed on the inner surface of the guide member 32, and a leaf spring 46 is
And the free end thereof is slightly projected from the groove 45 to elastically contact the outer peripheral portion of the flange 13. Three or four such leaf springs are arranged at equal intervals in the circumferential direction. is set up. Also in this case, the air is ejected from the air outlet 39 in the same manner as in the embodiment of FIG.
The projection bolt 10 is pushed out.

Referring to the embodiment shown in FIGS. 8 and 9, since the embodiment also has the same characteristics as the prior art shown in FIG. 11, members having the same functions as those shown in FIG. The same reference numerals are used and the detailed description is omitted. In this embodiment, a concave portion 34 is formed in the supply member 15 itself, and an air ejection port 39 is opened there. The supply member 15 is configured to stroke in a direction perpendicular to the advance / retreat axis 23. The holding of the projection bolt 10 is performed by suction, that is, suction force by air suction. When the projection bolt 10 is separated and projected, compressed air is ejected from the air ejection port 39. In this embodiment, the guide tube 4
A groove 48 is cut into the air hose 41.
Are configured to pass through. FIG. 8 shows the fixed electrode 4
9 and a steel plate part 50 are shown.

[0014] embodiment of FIG. 10, projects as shown in FIG. 8
Only the means for projecting the action bolt is different,
Here, a method in which the projection bolt is hammered out electromagnetically is adopted, and a projecting plunger 51 is provided at the center of the bottom surface of the supply member 15, and the projecting plunger 51 passes through the exciting coil 52 attached to the lower surface of the supply member 15. Let me do it. When the exciting coil 52 is energized, the protruding plunger 51 advances vigorously and strikes the projection bolt 10 into the receiving hole 25.

In the various embodiments described above, the so-called sequence control such as the operation of the air cylinder, the timing of air ejection, and the timing of energizing the exciting coil is performed by using a conventionally used electromagnetically controlled air switching valve in a control circuit. It can be easily implemented in such a manner as to operate with.

[0016]

According to the embodiments of the present invention, a projection Bol in a state in which advancing the portion of the projection bolt into the receiving hole
This makes it possible to avoid the unstable insertion of components due to the strength relationship of the magnets as described in the section of the prior art. Furthermore, since the supply member only needs to be moved to a state where the advance / retreat axis of the movable electrode or the like and the projection bolt are coaxial, and only the operation of reciprocating movement along the advance / retreat axis is sufficient, it is possible to simplify the mechanism mechanically. Become. Flop were allowed to enter the portion of the shaft portion into the receiving hole
Since it is to perform projection of Roger transfection bolt, the shaft
The part is guided by the receiving hole and fully inserted after a reliable transient. When the projection bolt is protruded
The concave part acts like a cylinder, and the flange
Acts like a piston, ensuring air pressure
Strong extrusion is achieved by acting on the projection bolt
You. By installing the magnet on the supply member, the components can be reliably held with a simplified structure. By performing component holding in vacuum and converting this to air ejection,
Since the component holding and the component projection are realized by a single method, it is effective to simplify the structure and increase the operation reliability.
In the configuration as shown in FIG. 1, the recess functions as a cylinder and the flange functions as a piston, and therefore, the movement of the projection bolt by the jet air is accurately realized. When the operation timing as shown in FIG. 2 is adopted, the movement of the supply member is added to the projection of the projection bolt ,
It is effective to increase the sudden output. The operation timing shown in FIG. 4 is effective in shortening the operation cycle time because the projection of the projection bolt and the return of the supply member overlap.

[Brief description of the 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 operation state.

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

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

FIG. 5 is a plan view of a supply member.

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

FIG. 7 is a plan view showing a part of FIG. 6;

FIG. 8 is a longitudinal sectional side view showing another embodiment.

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

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

FIG. 11 is a longitudinal sectional side view showing a conventional example.

FIG. 12 is a plan view of a mounting plate.

[Description of Signs] 12 Shaft portion 13 Flange 15 Supply member 10 Projection bolt 20 Supply rod 25 Receiving hole 37 Magnet 39 Air outlet 34 Recess 32 Guide member 35 Annular protrusion 36 Bottom portion

Claims (1)

(57) [Claims] 1. A project comprising a shaft and a circular flange.
Traction bolts are to be supplied.
The shaft of the projection bolt held by the feeding member
Move the supply member and insert it into the receiving hole of the supply rod
In the type, the supply member is a projection bolt
Member having a circular recess for accommodating a part of the
And formed on the inner peripheral portion of the guide member.
An annular projection with which the circumference of the flange engages, and a bottom of the recess;
The magnet installed in the section and the air outlet opening at the bottom
The projecting on the supply rod etc.
Supply member for inserting the action bolt.