JPS583768Y2 - parts feeder - Google Patents

Description

[Detailed description of the invention] This invention relates to an electromagnetic vibration parts feeder, and in particular,
To provide an electromagnetic vibrating parts feeder which has no imbalance in the vibration of a bowl for storing parts, has uniform conveyance characteristics around the entire circumference of the bowl, and is easy to assemble and adjust.

In general, the structural requirements for a vibrating parts feeder to operate stably and reliably without causing unbalanced vibrations or changes over time are explained with reference to Figures 1 and 2. First, the upper vibrating block The opposing surfaces of magnet 2 and magnet 5, which is fixedly installed opposite to this on the base 1 side, are parallel to each other, that is, the gap t is constant, and this mounting method is reliable so that it will not change over time. Secondly, the mounting dimensions t of the plurality of inclined leaf springs 3 that support the vibration block 2 on the base 1 are all the same, so not only is there an extremely small error, but also the vibration block 2 and the magnet It is known that the axes of the base 1 including the base 1 are aligned, and thirdly, the method of fixing the magnet 5 to the base 1 is highly reliable and does not change over time.

Conventionally, when assembling a vibrating body, a base 1 and a vibrating block 2 are connected together by a plurality of leaf springs 3 so that they are approximately horizontal as shown in FIG. The adjustment screw 4 is operated to adjust the gap size of the magnet 5 to the vibrating body 2 and the parallelism of the opposing surfaces of the two via the magnet mounting plate 7, and then the magnet mounting plate 7 is fixed with the tightening screw 6. It is tightened and fixed by pulling it downward.

As another example, as shown in FIG. 2, a vibration block 2 is attached to a base 1 by a plate spring 3 in the same manner as shown in FIG. It is supported and fixed via the magnet mounting plate 7 by a height adjusting nut 9 and a tightening nut 9' which are screwed together.

However, in all of these methods, the dimension t between the base 1 and the vibration block 2, the mounting dimension t of the leaf spring 3, and the deviation of the center of the vibration block 2 with respect to the magnet 5 and the base 1 influence each other. Even if you spend time and carefully adjust them using a trial method, if you put one value in the required value, the other values will be off, so it is almost impossible to put all of these values in the required value. This method of fixing was unreliable and prone to deterioration over time.

As a result, an unbalance of vibration occurs, causing the vibrating body to vibrate eccentrically, making it impossible to transport parts consistently, and sometimes causing no vibration at all.

In addition, adjusting the gap dimension t of the magnet with a screw is extremely difficult and requires skill, and the adjustment is also inaccurate.Furthermore, loosening of the screw or nut may cause the parts feeder itself to change over time, resulting in vibration failure. This caused unbalance and vibration as designed.

This idea is based on the three basic values for assembling the vibrating body, which are the dimension t between the base and the vibrating block, its parallelism,
The uniformity of the mounting dimensions of multiple leaf springs and the alignment of the centers of the base and vibration block can be assembled in one go within the design tolerance without making any complicated adjustments, and the errors can be reduced to parts machining errors. We have solved the above-mentioned drawbacks of the conventional parts feeder by providing a parts feeder that can employ a reliable assembly and adjustment method for fixing each component and that is unlikely to change over time. It is.

An embodiment of this invention will be described below with reference to FIGS. 3 and 4.

FIG. 3 is a front view of the vibrating body portion of this invented parts feeder assembled using an assembly jig, and parts corresponding to those in FIG. 1 are designated by the same reference numerals.

A magnet 5 is fixed on the base 1 of the parts feeder vibrating body with a plurality of bolts 17 via an intermediate member 10 to form a fixed part 21, and the lower surface of the base 1 serves as the reference bottom surface 1a of the vibrating body. A positioning reference hole 1' is bored in the center.

The vibrating portion 22 of the vibrating body is a vibrating block 2 disposed above the magnet 5 at a desired distance t, and this vibrating block 2 is supported by a plurality of leaf springs 3 projecting obliquely from the base 1. It is now possible to

The upper surface of the vibration block 2 is formed into a reference upper surface 2a that is parallel to the reference bottom surface 1a when the lower surface of the vibration block and the upper surface of the magnet 5 are parallel, and a positioning reference screw hole 2' is bored in the center thereof. It's dripping.

The assembly and adjustment items for the parts feeder vibrating body constructed in this manner will be described below.

First, the opposing surfaces 11b and 1 of the two disc-shaped plates 11.12
2b is precisely finished parallel to the reference top surface 2a and reference bottom surface 1a of the vibrating body so as to be brought into close contact with the reference surface 2a and the reference bottom surface 1a.

Furthermore, as shown in FIGS. 4a and 4b, circular grooves 11C and 12c are cut in the same size and concentric with each plate, and a plurality of spacer pieces 14 shown in FIG. The disks 11 and 12 are engaged with the upper and lower ends of the vibrator assembly dimension H.
As shown in FIG.

In addition, a sensor pin 11a is implanted in the center of the center mounting surface of the lower plate 11 to which the base 1 is attached, with its tip protruding for maintaining concentricity between the fixed portion 21 and the vibrating portion 22, and the protruding portion is It is constructed so that it fits lightly and precisely into the positioning reference hole 1', and the reference bottom surface 1a and the mounting surface 11b can be brought into close contact with each other without any gaps.

On the other hand, a through hole 12a is bored in the center of the mounting surface 12b of the upper plate 12, and the neck of the screw pin 13 is tightly and precisely fitted into the through hole 12a. It is firmly screwed into the positioning reference screw hole 2', and the top surface of the plotter 2 and the mounting surface 12b are mounted in close contact with each other without any gaps.

In this way, the vibration part 22 and the fixed part 21 are such that the parallelism between the upper surface of the magnet 5 and the lower opposing surface of the vibration block 2 and the gap dimension t between them are within the machining tolerance of each component, and the upper and lower mounting The member is the center pin 11 at the center of each
Since the position is determined by a and the screw pin 13, the misalignment of both members is within the machining error range.

Next, the upper plate 12 is appropriately rotated to adjust the mounting seats of the leaf springs 3 to the mounting angle position, and the plurality of springs 3 are mounted with bolts.

At this time, it is natural that the mounting dimension t is within the machining error range of each component, as in the above case.

Therefore, if you loosen the screw pin 13 and remove the assembly device,
Assembling the vibrating body within the design tolerance can be completed in one go without making any adjustments.

Since readjustment is not required once during the assembly process, there is no need to loosen or retighten the bolts 17 that secure the magnet 5 to the base 1 via the intermediate member 10 and the mounting bolts of the leaf spring. Since there is no such thing, it is possible to use an appropriate locking means (not shown), which guarantees reliable vibration performance that does not change over time.

Furthermore, with conventional vibrators, as shown in Figures 1 and 2, it is necessary to make trial adjustments many times in order to bring the above three values within the required range.
For convenient adjustment, the magnet 5 is attached to a plate-shaped mounting plate I.
At the same time, the base 1 is configured to be adjustable and supported on a plurality of threaded rods with a space interposed therebetween.

Such a structure is extremely unreliable in terms of rigidity, and since the present invention requires only one assembly operation and no subsequent adjustment, the magnet 5 should be placed directly on the base 1 via the intermediate member 10 with some space. Since it can be fixed in one piece without any problems, an extremely reliable configuration can be adopted.

Reference upper surface 2a of the vibrating body assembled and adjusted as described above
Although not shown, there is a so-called
Attach the bowl by screwing to complete the parts feeder.

In the above embodiment, a screw hole was used as a positioning reference hole on the upper surface of the vibrating part, but the disk 12 and the vibrating block 2
Even if the bowl mounting screws or other fastening means provided at several places on the top surface of the vibration block are used as the fastening means, and the reference hole is a hole that is made to fit as a mating pin in the same way as the fixed part, this It is clear that the idea can be implemented.

As described above, according to this invention, it is possible to obtain a parts feeder that does not require readjustment through one-time assembly and whose characteristics hardly deteriorate due to changes over time.

[Brief explanation of the drawing]

Figures 1 and 2 are front views of conventional parts feeder vibrators, Figure 3 is a front view showing the assembly process of the pier feeder according to this invention, and Figure 4 is a front view of the vibrator used in the assembly process of Figure 3. It is an explanatory view of an assembly jig. 1...Base, 2...Vibrating flock,
1', 2'...Positioning reference hole, 3...
・Plate spring, 5... Magnet, 11, 12...
...Disc, 11a...Pin, 13...
... Screw pin, 21 ... Vibrating body fixing part, 22
... Vibrating body vibrating part.

Claims (1)

[Scope of utility model registration request] A reference bottom surface is provided on a fixed part that integrally fixes the magnet of the vibrating body to the base, and a reference top surface is provided on the vibrating part of the vibrating body, and positioning reference holes are provided in the bottom surface of the fixed part and the top surface of the vibrating part. A parts feeder characterized by: