JPS638666Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a parts feeder that transports parts by vibration.

<Background of the prior art and its problems> In recent years, vibrating parts feeders that use vibration to transport parts have been used in automatic assembly processes to feed and align various parts. Parts feeders play a very important role in automatic assembly machines.

Conventional parts feeders of this type include general ones with a simple structure, such as the Japanese Patent Publication No. 56-20244.
The parts feeder described in the same publication has a plurality of tracks, and these plurality of tracks are supported by a support device that prevents the vibrations of the tracks from being transmitted to the table side. Since the vibration generator is supported on the platform and each of these tracks is provided with a vibration generator that moves in opposite directions alternately, a number of vibration generators that correspond to the number of tracks are required, which leads to an increase in parts cost. In addition, in order to equalize the vibrations in the opposite directions of the tracks obtained by the plurality of vibration generators, identical and highly accurate vibration generators are required, which also causes the increase in costs. It is the cause of
In particular, since the strength of the vibrations provided by all vibration generators must be equal,
Based on a highly precise design, it must be installed on the truck with high precision, and adjustments during assembly are difficult and require skill.

In addition, in order to generate equal vibrations in the vibration generator, it is necessary not only to have a mechanical configuration but also to precisely control the power supply, and in addition, conventional devices cannot variably adjust the transfer speed. Nakatsuta.

<Purpose of the invention> The present invention was made in order to eliminate the drawbacks of the prior art as described above, and its purpose is to balance the vibrations of the transport truck and thereby create stable parts. The objective is to make it possible to transfer vibrations and to freely change the transfer speed.More specifically, to reduce assembly and manufacturing costs, and to make it possible to freely adjust the vibration transfer speed in a stable manner. The purpose is to do so.

<Structure of the invention> In a parts feeder of a type in which a set of two-sided parts transfer tracks are arranged adjacently in parallel, and both tracks are vibrated by the operation of a vibration generating source,
An electromagnet is used as a vibration generating source, and one track is provided with the magnetic armature of the electromagnet, and the other track is provided with the core of the same electromagnet.

<Example> In Figures 1 and 2, 1 is a mounting base;
2 and 2' are tracks that are supported by a plurality of leaf springs 3 fixed on the table 1 at a slight inclination and form a transport path for parts 4, and 5 is a unit for vibrating both tracks 2 and 2'. This is the first vibration generator.

Both the above-mentioned tracks 2, 2' are mainly composed of elongated plates formed symmetrically, and the tracks 2, 2' are
2' has upward rising parts 2a, 2a' on the outside thereof, and by aligning both inner edges thereof horizontally and arranging them parallel to each other in the length direction, a shallow groove-shaped transfer path 6 is formed. (Fig. 2), elastic bristles 7 are provided in this transfer path 6 to provide frictional resistance to the parts, and are inclined at an appropriate angle in the direction of transfer of the parts 4 and have an appropriate density. The upper surfaces of the tracks 2, 2' are covered with a raised mat 8.

The leaf springs 3... are for promoting the resonance of the tracks 2, 2', and in order to effectively vibrate the tracks 2, 2' in opposite directions, the leaf springs 3... are for promoting the resonance of the tracks 2, 2'. They are supported individually (see Figure 2). Although a plurality of leaf springs 3, 3... are stacked one on top of the other as described above, a gap is provided between the leaf springs 3, 3 in order to bring about a large resonance effect, and the bottom surface of the tracks 2, 2' is and mounting bracket 9 on the top surface of stand 1... and bolt/nut fixing tool 1
It is fixed by 0...

As shown in FIG. 3, the vibration generator 5 includes:
The electromagnet 11 is electromagnetically attracted across the magnetic flux generated between the opposing magnetic poles 12 and 12' of the electromagnet 11.
The magnetic armature 5a is fixed to the lower surface of one of the tracks 2 via an L-shaped angle member 13. In addition, the cores 5b and 5b' of the electromagnets are connected to a block-shaped intervening member 14.
The power supply circuit includes a diode (not shown) and a controller 15 that provide continuous pulses in a constant direction to the induction coil of the electromagnet. It is connected. 16 is a power cord.

According to this embodiment, when the power switch 15a of the controller 15 is turned on, a current is applied to the induction coil of the vibration generator 5, and at 50 cycles of commercial alternating current, the electromagnet is activated by the positive half wave.
Since the magnetic armature 5a is excited once per second and demagnetized using a negative half wave, the magnetic armature 5a repeatedly moves back and forth between the magnetic poles by repeating this excitation and demagnetization. At this time, if the controller 15 is adjusted with the adjustment knob 15b, the alternating current voltage flowing through the induction coil of the electromagnet 11 changes, so that the amount by which the magnetic armature 5a enters between the magnetic poles 12 and 12' of the electromagnet changes. By controlling the vibration generator 5 in this way, the stroke of the reciprocating movement of the magnetic armature 5a is adjusted.

When the electromagnet is energized, the magnetic armature 5a slides to the left in FIG. This magnetic armature 5a is fixed to the truck 2 side,
Since the track is fixed to the upper end of the leaf spring 3 whose lower end is fixed on the mounting base 1, when the magnetic armature 5a slides as described above, the leaf spring 3 tilts to the left in FIG. Accumulate elasticity,
Truck 2 moves in the same direction. An electromagnetic core 5b forming an electromagnet in pair with the magnetic armature 5a is mounted on another track 2' supported by another leaf spring 3 whose lower end is fixed on the mounting base 1.
Therefore, when the electromagnet is excited, the electromagnetic core 5b moves in the opposite direction to the magnetic armature 5a, and the track 2' moves to the right, moving the track towards the upper end. The leaf springs 3 supported by are tilted in the same direction to accumulate elastic force.

Next, when the electromagnet is demagnetized, the tracks 2 and 2' move back in opposite directions due to the elastic force of the leaf springs 3 and 3, which have accumulated elastic force as described above, and return to their original positions.

The above electromagnet is repeatedly excited and demagnetized 50 times/second under a 50Hz commercial power supply, causing the tracks 2, 2' to reciprocate, and at this time, the leaf springs 3, 3
With the help of resonance, the tracks 2 and 2' are caused to vibrate slightly. Since this vibration is a transverse wave, it propagates sequentially in the length direction of the tracks 2, 2', and the raised mats 8 provided in the transfer paths 6 of the tracks 2, 2' also vibrate.

For this reason, the parts 4 placed on the raised pine 8
is subjected to directional vibration, and the arrow A in Figure 1
However, as the stroke of the reciprocating movement of the magnetic armature 5a increases, the transfer speed increases, and as the stroke decreases, it slows down.

<Effects of the Invention> As is clear from the embodiments described above, the parts feeder of the present invention has the following effects.

(1) A single vibration generator is used in the double track, and the magnetic armature side is fixed to one track and the core side is fixed to the other track, so the reciprocating motion of the magnetic armature is similar to that of the same armature. Since the cores are moved relative to each other and their reciprocating strokes are equally balanced, the vibration amplitudes of both tracks are equal. There is no need for highly accurate adjustment, and costs can be reduced. In addition, unlike when installing a pair of conventional vibration generators, there is no need to make the dimensional accuracy of the mounting holes or the accuracy of the mounting accessories particularly high, and the fixing and assembly work is easy and requires almost no skill. Not needed.

(2) Since the desired purpose can be achieved with just a single vibration generator, no special power control means are required, and it is not possible to combine them as in the case of installing a pair of conventional vibration generators. There are no problems with irregularities, and the reciprocating motion of the magnetic armature appears as vibrations of the two-sided track, making it possible to significantly simplify the mechanism.

[Brief explanation of the drawing]

The drawings show one embodiment of the parts feeder according to the present invention. Fig. 1 is a partially cutaway side view showing the whole, Fig. 2 is a partially cutaway plan view, and Fig. 3 is a diagram showing a vibration source. It is a schematic diagram. 1... Stand, 2, 2'... Truck, 3... Leaf spring, 4... Parts, 5... Vibration generator, 5a...
...Magnetic armature, 5b, 5b'...Core, 6...
...Transfer path, 7...Elastic hair, 11...Electromagnet, 1
2,12'...Magnetic pole.

Claims (1)

[Scope of claims for utility model registration] (1) A set of two-sided parts transport trucks,
In a parts feeder in which both tracks are arranged side by side and are vibrated by the operation of a vibration source, the above-mentioned tracks are supported by the upper part of a leaf spring whose lower part is fixed, and the lower part of one track is supported by a An electromagnet having a pair of magnetic poles facing each other and excited by a half-wave of commercial alternating current is fixed, and on the bottom surface of the other track is placed on the center line between the magnetic poles. A parts feeder with a fixed magnetic armature that is attracted to. (2) The parts feeder according to claim 1, which is a registered utility model, in which elastic bristles are densely planted on both tracks and slanted in the direction of transport of the parts.