JPH0677844B2 - Parts feeder - Google Patents

Description

Description: (a) Field of Industrial Application The present invention relates to a component supply device that conveys a component in a substantially horizontal direction and supplies it to a target location, and has a large amount of impurities such as a narrow space and iron powder. It is more effective when applied to a part.

(B) Conventional technology As the prior art, Japanese Patent Application No. 60-281752 (Japanese Patent Application Laid-Open No. 62-142085) filed on Dec. 14, 1985, which is my invention, "Spot Welder Parts Supply Device" And Japanese Patent Application No. 61-37582 filed on February 22, 1986 (Japanese Patent Laid-Open No. 62-197283).
"Spot welding machine parts supply device" and the like.
In these, a rod-shaped guide member slides back and forth in a guide groove, and a component is placed and moved on a component holding portion formed by a difference in length between two guide members.

(C) Problems to be Solved by the Invention In the above-mentioned conventional technique, since a long member forming the guide groove needs to be installed up to the target location, it is necessary to secure a proper space, It may be difficult to adopt it in connection with other equipment, piping, wiring, etc. In addition, impurities such as iron powder intrude into the guide groove, which takes time to remove. More importantly, since the parts are simply placed on the parts holder, there is concern about the holding stability during transfer, and the arrival of parts at the target location may also be affected by instability during transfer. The certainty may not be obtained completely.

(D) Means for Solving the Problem and Its Action The present invention is provided to solve the above-mentioned problems, in which the main rod and the auxiliary rod that move back and forth in a substantially horizontal direction are provided. The rods are assembled in a slidable position to the upper position, and the tips of both rods have a length in which the main rod protrudes more than the sub-rod, and a magnet that attracts and holds parts to the protruding part of the main rod is used. The position of the frame member is set so that only the two rods advance into the space from the frame member that performs the mounting and guiding function, and the parts held by the main rod are stopped so that the parts are stopped just above the target point. The vertical position is determined, the magnets are separated from the parts by relative sliding of both rods, and the adsorption holding of the parts is released to drop the parts to the target location. By advancing in the space, moving the magnet to a slightly higher position than the target position while holding it securely with the magnet, and then separating the magnet to the inactive position, the suction holding of the component is released and the target position is released. The drop supply is completed.

(E) Example First, the example of FIGS. 1 to 7 will be described. The component in this embodiment is a projection nut having a welding projection, as shown at 1. The main rod 2 and the sub rod 3 are slidably combined with each other, and the main rod 2 is located above the sub rod 3 as shown in the figure, and is arranged in a substantially horizontal posture to perform a guide function. It is held by the member 4. The position of this frame member is set so that both rods advance into the space. The tips of both rods have a length such that the main rod 2 projects more than the sub rod 3, and a magnet (permanent magnet) 5 is embedded in the projecting portion of the main rod 2.

The feed cylinder 6 fixed on the stationary member is preferably operated by compressed air, and its piston rod 7 is the auxiliary rod 3.
Is connected to. The auxiliary cylinder 8 fixed on the sub rod 3 is also preferably operated by compressed air, and its piston rod 9 is connected to the main rod 2. The auxiliary cylinder 8 plays a role of retracting the main rod 2, and an alternative is an electromagnetic solenoid or the like.

In this embodiment, the nut 1 is spot-welded to the opposite sheet metal part 10, and the guide pin 12 is provided on the fixed electrode 11.
The sheet metal part 10 is placed with the
A movable electrode 13 is installed coaxially with 11. In this embodiment, the supply destination of the nut 1 is the guide pin 12,
As is clear from FIGS. 1 to 4, the upper and lower positions of both rods are set so that the component held by the main rod stops just above the target location.

FIG. 1 shows that the nut 1 is adsorbed and held by the magnet 5 and is also in close contact with the front end face of the auxiliary rod 3, and when the feeding cylinder 6 is operated here, both rods 2, 3
Move forward together without any relative displacement. When the screw hole of the nut 1 and the guide pin 12 come to a position where the nut 1 and the guide pin 12 coincide with each other, the advance of the feeding rod 3 is stopped and the state shown in FIG. 3 is obtained. That is, it stops just above the destination.

Next, when the main rod 2 is slid to the right by the operation of the auxiliary cylinder 8, only the main rod 2 moves to the right while the nut 1 is stopped at the front end face of the sub rod 3.
Therefore, the magnet 5 is separated from the nut 1,
Since the suction-holding force of the nut 1 is erased, the nut 1 falls and becomes in a state of matching the guide pin 12 as shown in FIG.

After that, the nut welding is completed when the movable electrode 13 descends after both rods retract.

Explaining the means for attracting and holding the nut 1 to the magnet 5, the front end portions of the side wall plates 15, 16 of the U-shaped cross-section type shutter 14 which guides the nut 1 are cut out to form passage portions 17, 18 for both rods. At the front edge of the computer 14, a stop board 1
9 is installed. As shown in FIGS. 5 and 7,
The bearing pieces 20 and 21 are fixed to the lower part of the shock absorber 14, and the opening / closing plate 23 is fixed to the pivot 22 attached to these bearing pieces 20 and 21.
A helical coil spring (not shown) is attached to the pivot 22 so that its elastic force maintains a closed state as shown by the solid line in FIG. 7, and the nut 1 is pushed out. In the transitional period to go, the opening / closing plate 23 is pushed open as shown by the two-dot chain line in FIG.

Another magnet 24 fitted in the stopper plate 19 is for bringing the nut moving in the shutter 14 into close contact with the stopper plate 19 for positioning, while the opening / closing plate 23 has a front end face of the auxiliary rod 3. The nut 1 is prevented from slipping until it comes into close contact with the nut 1. That is, when both rods 2 and 3 move forward to the left from the state shown in FIG. 7, the nut 1 does not come into close contact with the front end face of the sub rod 3 and the magnet 5 of the main rod 5
It tries to be pushed to the left by
By the restraint function (temporary locking function) of the magnet 24, the nut 1 is stopped substantially at that position until the front end face of the sub rod 3 comes into close contact with the nut 1.

The embodiment described above is of a type in which the component, that is, the nut, is moved to a predetermined position and then the suction holding force of the magnet is released. However, in the embodiment shown in FIG. 8, the nut comes immediately before the predetermined position. This is a type in which the holding force is released when That is, as shown in the figure, a compression coil spring 25 is interposed between the main rod 2 and the sub rod 3 to exert an elastic force in the pushing direction on the main rod 2, and the restriction pin 26 fixed to the sub rod 3 is fixed to the main rod 2. By hitting the right end of the second long hole 27, the elasticity of the spring 25 is received. The stopper pin 28 fixed to the main rod 2 comes into contact with the frame member 4 when both rods advance.

When the feed cylinder 6 is operated from the state shown in FIG. 8, the auxiliary rod 3 moves leftward while the main rod 2 is mounted and the nut 1 is adsorbed and held, and when the nut 1 comes close to the target position,
Since the stopper pin 28 collides with the frame member 4, the main rod 2
Although the forward movement of the nut is stopped here, the nut 1 is pushed out while sliding on the magnet 5 because the regulating pin 26 of the auxiliary rod 3 moves in the long hole 27. At this time, the nut 1 is relatively separated from the magnet 5 as described above.

FIGS. 9 and 10 show the case where the main rod 2 is housed in the pipe-shaped sub rod 3, and in order to improve the suction retention, the main rod 2 is formed with a flat surface portion 29. is there.

FIG. 11 shows an embodiment in which a bolt 31 having a flange 30 is handled.

Reference numeral 35 in FIG. 12 is a rectangular sheet metal part having flanges 36 and 37 on both sides. When handling such a thing, the main rod 2 and the sub rod 3 as shown in FIG.
In order to improve the holding stability of, the two magnets 5 are attached.

It is appropriate that both the main and sub rods are made of stainless steel, and the behavior of both rods may be not only the forward / backward movement but also a rotational movement (swing movement).

(F) Effect According to the present invention, the main rod is arranged on the upper side of the sub rod, and the magnet is attached to the main rod in a protruding state,
Since the position of the frame member is set so that both rods advance into the space from the frame member that attracts the component and guides the component, the component can be transported in the air. It is not necessary to specially provide such a guide groove, and it is possible to avoid problems regarding space and peripheral devices. This point is extremely important when the parts are to be inserted in a narrow space. Further, since the guide groove is unnecessary, maintenance of the inside of the groove is eliminated. When both rods move forward, the parts are in a suction holding state, so the holding stability during transfer is good, and the parts do not drop accidentally.
Furthermore, when the part comes to a predetermined position, the height position of both rods is set so that the part stops just above the target position, and the magnet is separated from the part by relative sliding of both the main and auxiliary rods. Since it is a method that can be performed, the holding force of the component can be surely erased, and the detachment of the component can be reliably achieved. At the same time, since the parts are dropped to a target location from a slight height position, it is possible to obtain highly reliable parts supply without using a special mechanism.

[Brief description of drawings]

1 is a general side view, FIG. 2 is a sectional view taken along line (2)-(2) of FIG. 1, and FIGS. 3 and 4 are partial side views. , FIG. 5 is a partial plan view, FIG.
The figure is a three-dimensional view of the end of the computer, and Fig. 7 is (7)-in Fig. 5.
(7) Sectional view, FIG. 8 is a side view showing another embodiment, and FIG.
The drawing is a partial side view, FIG. 10 is a front view, FIG. 11 is a side view, FIG. 12 is a three-dimensional view of other parts, and FIG. 13 is a side view. 2 ... Main rod, 3 ... Sub rod, 5 ... Magnet,
4 …… Frame members 1,31,35 …… Parts.

Claims (1)

[Claims] Claim: What is claimed is: 1. A main rod and a sub rod that move back and forth in a substantially horizontal direction are combined in a slidable state such that the main rod is located at an upper position, and the tips of both rods are such that Also has a protruding length, a magnet for attracting and holding components is attached to the protruding portion of the main rod, and the position of the frame member is set so that both rods advance into the space from the frame member that performs the guide function. The upper and lower positions of both rods are set so that the parts held by the main rod stop just above the target location, and the magnets are separated from the parts by the relative sliding of both rods to release the parts from adsorption and holding. A component supply device characterized by being dropped at a target location.