JPH11118588A - Vibration detector for elliptical vibration parts feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vibration detector in which the number of components is reduced and whose mounting operation can be simplified by a method wherein a rectangular two-direction sensor is attached to a mounting frame or to a bowl. SOLUTION: A first spring 5 supports a bowl 10 attached to a mounting frame so as to be capable of vibrating the bowl 10 to the horizontal direction, and a second spring 5 supports the bowl 10 so as to be capable of vibrating the bowl 10 to the vertical direction. A first electromagnet excites the bowl 10 to the horizontal direction, and a second electromagnet excites the bowl 10 to the vertical direction. A vibration detector for an elliptical vibration parts feeder detects a vibration in the horizontal direction and that in the vertical direction. Then, a rectangular two-direction accelerometer P is attached to the mounting frame or to the bowl 10. When the vibration is sinusoidal, it is differentiated twice so as to obtain an acceleration. Since the horizontal direction and the vertical direction are at an identical frequency, the amplitude of both directions can be detected equally although a phase difference exists. By this constitution, the number of components of the vibration detector can be reduced, and its mounting operation can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vibration detecting device for an elliptical vibration parts feeder.

[0002]

2. Description of the Related Art FIG. 5 shows the entirety of an elliptical vibration parts feeder which is being developed by the present applicant. Reference numeral 10 denotes a bowl having a spiral track 11 formed on an inner peripheral wall thereof, which will be described in detail later. And is fixed at the center by bolts 12.

FIG. 6 is a perspective view of an elliptical vibration drive unit in a state in which a bowl 10 has been removed. The electromagnets for vertical vibration force and a pair of radially facing horizontal vibrations are fixed to the fixed frame 1 as described later. An electromagnet is mounted, and eight radially extending protrusions are provided on the outer peripheral edge of the upper movable frame 6 as a mounting frame to which the bowl 10 is mounted. And both ends of the leaf spring 5 are fixed by bolts.

As shown in FIGS. 8 and 9, vertical vibration leaf springs 15a, 15b, 15c, and 15d are fixed at the center thereof by the arms of the lower frame 3, and both ends thereof are connected to each other. The fixed frame 1 is fixed to the leaf spring mounting portion 1a by bolts. As clearly shown in FIG. 7, the movable core 31 of the above-described electromagnet for vertical excitation is fixed to the lower surface of the upper movable frame 6, and the electromagnet 32 around which the coil 33 is wound with a gap is fixed. It is fixed to the center of the frame 1. Further, a pair of electromagnets for horizontal exciting force are fixed in the radial direction of the fixed frame 1, which is fixed to the upper movable frame 6, and is wound around a movable core 21 and a coil 22 which hang downward. It consists of an electromagnet.

When voltages are applied to the electromagnet coils 33 and 22 with a predetermined phase difference therebetween as described later, current flows in the vertical and horizontal directions with the phase difference, thereby obtaining a known The bowl performs an elliptical torsional vibration. In FIG. 5, the locus is exaggerated by V.

The vertically extending leaf springs 5 determine the resonance frequency of the horizontal component of the bowl 10, and the horizontally disposed leaf springs 15a, 15b, 15c, 15d determine the vertical resonance frequency. . In general, in elliptical vibration, a voltage is applied to the electromagnet 22 for horizontal excitation force so as to substantially match the resonance frequency in the horizontal direction. However, a predetermined phase difference is applied to the electromagnet coil 33 for vertical excitation. , A voltage of the same frequency is applied, and is driven at a frequency shifted from the resonance point.

However, in order to provide a predetermined phase difference between the vertical vibration and the horizontal vibration, and to control the horizontal and vertical amplitudes to predetermined values, , Vertical and horizontal vibrations must be detected. For this and as best seen in FIG. 7, the pickup mounting plate 34 in proximity to the plate spring 5 for the detection of horizontal vibration is fastened to the leaf spring 5 by a bolt b _1, the upper end A proximity sensor 35 is attached to the portion. This detecting portion is located on the surface of the mounting plate 34 facing the leaf spring 5 which is not visible.

Similarly, for detection of vertical vibration,
As demonstrated in Figure 8, the pickup mounting plate 36 is fastened also by bolts b ₂ to the other of the plate spring 5 is L
The proximity sensor 37 is attached to this end, and its detection surface is brought close to the upper surface of the vertical diaphragm leaf spring 15a.

A controller (not shown) receives the detection outputs of these proximity sensors 35 and 37 to maintain a predetermined phase difference between the vertical direction and the horizontal direction, or to control the vertical and horizontal directions when constant amplitude control is performed. The constant amplitude control is performed by comparing with the predetermined amplitude value in each direction. Such pickup mounting plates 34, 36 are mounted close to the leaf springs 5, 15a as described above. The operation is difficult, especially when the screw vibration drive unit is heavy, it is very difficult to move the screw vibration drive unit.
6. The number of components and the proximity sensors 35 and 37 are increased accordingly.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a vibration detecting device for an elliptical vibrating device, in which the number of parts is reduced and mounting work is very simple. And

[0011]

The object of the present invention is to provide a first spring for horizontally supporting a bowl mounted on a mounting frame and a second spring for vertically supporting the bowl. Vibration of an elliptical vibration parts feeder comprising: a first electromagnet for vibrating the bowl in a horizontal direction; and a second electromagnet for vibrating the bowl in a vertical direction, and detecting the horizontal and vertical vibrations. A vibration detecting device for an elliptical vibration parts feeder, wherein a right-angled two-directional acceleration sensor is mounted on the mounting frame or the bowl.

With the above construction, the mounting of one right-angled two-direction acceleration sensor (also referred to as a so-called XY-direction acceleration detecting sensor) is very simple. In particular, in the bowl and the mounting frame, for example, in the conventional example, It is very easy to fix to the periphery of the upper movable frame 6 in that the bowl is always installed facing upward. If the vibration is sinusoidal because it is an acceleration sensor, the acceleration is obtained by differentiating this twice, and the vibration frequency is the same in the vertical and horizontal directions. Yes, but can be detected equally. The amplitude is detected by integrating the force twice.
Since only a phase difference of 80 degrees, omega ² magnification can be attached can be carried out a phase difference control between the easy equivalent TAFE width control and vertical horizontal Considering these.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a vibration detecting apparatus applied to an elliptical vibration parts feeder according to an embodiment of the present invention will be described with reference to FIGS. Note that the same reference numerals are given to portions corresponding to the respective portions of the above-described vibrating parts feeder developed earlier by the present applicant, and detailed description thereof will be omitted.

That is, according to the present embodiment, the pickup mounting plates 34 and 36, which were conventionally required, are omitted, and therefore, the proximity sensors 35 and 37 are also omitted, and the bolt b
₁ and b ₂ directly tighten the leaf spring 5. Instead of this, according to the present invention, a two-way orthogonal acceleration sensor P is attached to the side surface of the bowl 10 via a magnet plate, for example, as clearly shown in FIGS. Alternatively, screws may be used.

FIG. 4 shows the details of the sensor P in a state where the cover is removed, and a mounting hole 51 of the removed cover is formed in the substrate 50.
The direction acceleration sensor 52 is made of, for example, lead zirconate or a semiconductor. In addition, a similar acceleration sensor 54 for the X direction is mounted directly on this. When the bowl 10 performs an elliptical vibration, its mass × acceleration is applied as a force to its horizontal component X and its vertical component Y. When these are integrated twice respectively, the vibration displacement in the Y direction and the X direction is detected. can do. This can be used for the constant amplitude control or the phase difference control in the horizontal and vertical directions. Of course, the phase difference control can be performed without changing the acceleration without integrating.

As described above, according to the embodiment of the present invention, by simply attaching the acceleration sensor P as one unit to the bowl 10, it is possible to obtain the same operation as the conventional one, and to reduce the number of parts. Can be greatly reduced.

Although the embodiments of the present invention have been described above, the present invention is, of course, not limited thereto, and various modifications can be made based on the technical concept of the present invention.

For example, in the above-described embodiment, the sensor P is mounted on the side surface of the bowl 10, but may be mounted on the peripheral surface of the upper movable frame 6 instead.

The above-mentioned elliptical vibration parts feeder is an elliptical vibration parts feeder currently being developed by the present applicant. Of course, the present invention is not limited to this, and the present invention is applicable to all conventionally known elliptical vibration parts feeders. Applicable to

[0020]

As described above, according to the vibration detecting apparatus for an elliptical vibration parts feeder of the present invention, the number of parts is greatly reduced, and the mounting work is very simple.

[Brief description of the drawings]

FIG. 1 is a perspective view of an elliptical vibration parts feeder to which a vibration detection device according to the present invention is applied.

FIG. 2 is a perspective view of a drive unit excluding the bowl.

FIG. 3 is a partially cutaway perspective view of the driving unit.

FIG. 4 is a plan view of the sensor according to the embodiment of the present invention with a cover removed.

FIG. 5 is a perspective view of an elliptical vibration parts feeder currently being developed by the present applicant.

FIG. 6 is a perspective view of the drive unit with the bowl removed.

FIG. 7 is a partially cutaway perspective view of the drive unit.

FIG. 8 is a front view of the driving unit.

FIG. 9 is a rear view.

[Explanation of symbols]

 10 bowl P sensor

Claims (1)

[Claims] 1. A first spring for supporting a bowl mounted on a mounting frame so as to vibrate in a horizontal direction, a second spring for supporting the bowl so as to be able to vibrate in a vertical direction, and vibrating the bowl in a horizontal direction. A first electromagnet, and a second electromagnet that vibrates the bowl in a vertical direction, wherein the vibration detection device of the elliptical vibration parts feeder is configured to detect the horizontal and vertical vibrations. A vibration detection device for an elliptical vibration parts feeder, wherein a right-angled two-direction acceleration sensor is mounted on a bowl.