JP3944757B2 - Elliptical vibration parts feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elliptical vibration parts feeder.
[0002]
[Prior art]
In FIG. 15, an elliptical vibration parts feeder that is an elliptical vibration device is generally indicated by 1 ′ and includes a bowl 2 ′ in which elliptical vibration is performed. A spiral track is formed on the inner peripheral surface of the bowl 2 ', and a wiper is provided at an appropriate position on the downstream side. Although this wiper is already well known and omitted from the drawing, it is formed by bending a flat plate, and the distance between its lower end and the transfer surface of the track is larger than the thickness of the component m (flat plate) to be fed, Smaller than this. At the discharge end of the truck, posture holding means is provided, through which a component in a desired posture (for example, a component m having a long side facing the transfer direction) is supplied to a linear vibration feeder (not shown).
[0003]
The bowl 2 'is fixed to a cross-shaped upper movable frame 7 shown in FIG. 16, and four sets of the upper movable frame 7 in which a cross-shaped lower movable frame 8 shown in FIG. Are connected by a laminated leaf spring 9. That is, the upper end portion of the overlap plate spring 9 is fixed to the four end portions 7a of the upper movable frame 7 by bolts, and the lower end of the overlap plate spring 9 is fixed to the four end portions 8a of the lower movable frame 8 by bolts. Yes. Note that the end portions 7a and 8a are aligned in the vertical direction.
[0004]
Horizontal movable cores 16a and 16b are fixed to the lower surface of the upper movable frame 7 so as to face the horizontal drive electromagnets 14a and 14b. Further, a vertical movable core 13 is fixed to the central portion of the lower surface of the upper movable frame 7, and a vertical drive electromagnet 11 is fixed to the central portion of the fixed frame 10 so as to face this. In the figure, reference numeral 12 denotes a coil wound around the vertical drive electromagnet 11. In contrast, a pair of horizontal drive electromagnets 14a and 14b are fixed to opposite side walls of the fixed frame 10 with the vertical drive electromagnet 11 interposed therebetween, and coils 15a and 15b are wound around the electromagnets 14a and 14b, respectively. Has been.
[0005]
The fixed frame 10 is integrally formed with four leg portions 17, and these leg portions 17 are supported on the base via vibration-proof rubbers 18. The leg portions 17 are integrally formed with spring mounting portions 17a extending in the lateral direction. The spring mounting portions 17a have four sets of vertical leaf springs 19 at both ends as shown in FIG. It is fixed with bolts. The overlapping leaf springs 19 are overlapped via spacers 20 as shown in the figure, and their central portions are fixed to the lower movable frame 8 by bolts.
[0006]
In the above configuration, the horizontal drive electromagnets 14a and 14b are first vibration drive sources that generate a horizontal excitation force. The first vibration system driven by the horizontal drive electromagnets 14a and 14b is the bowl 2 ′, the stack leaf spring 9, It consists of horizontal movable cores 16a and 16b. That is, when a current is supplied, the horizontal drive electromagnets 14a and 14b generate a magnetic attractive force, whereby the horizontal movable cores 16a and 16b are attracted, and the restoring force of the overlapping leaf spring 9 pulled at this time. The upper movable frame 7 vibrates in the horizontal direction. The vertical drive electromagnet 11 is a second vibration drive source that generates a vertical excitation force. The second vibration system driven by the vertical drive electromagnet 11 includes a bowl 2 ′, a laminated leaf spring 19, a vertical movable core 13, and the like. Consists of. That is, the vertical drive electromagnet 11 generates a magnetic attractive force by the supplied current, the vertical movable core 13 of the upper movable frame 7 is attracted, and at this time, the lower movable frame 8 of the overlap leaf spring 19 (this is Since the portion connected to the upper movable frame 7 and the overlapping plate spring 9 is pulled downward, the upper movable frame 7 vibrates in the vertical direction by the restoring force of the overlapping plate spring 19. . That is, by causing the horizontal direction and the vertical direction to vibrate independently and providing a phase difference between the vibrations, the upper movable frame 7 and the bowl 2 ′ formed integrally therewith cause elliptical vibration. ing.
[0007]
In the above-described structure, both ends of the vertical leaf spring 9 are fixed to the arm portion 7a of the upper movable frame and the arm portion 8a of the lower movable frame. However, in practice, a torsional motion as shown in FIG. 19 is performed, and the upper surface of the leaf spring 9, that is, the arm portion 7a is slightly lowered not only in the horizontal direction but also in the vertical direction. As a result, the bowl 2 'wants to be moved in a horizontal plane by a pair of horizontal electromagnets, but a slight vertical component appears. In particular, when it is desired to control the vertical amplitude and horizontal amplitude to a constant value in elliptical vibration, the horizontal vibration displacement and the vertical vibration displacement are detected by the pickup and controlled to match the set value. Such a phenomenon makes it difficult to control the voltage applied to the vertical direction electromagnet. In some cases, constant amplitude control may not be possible.
[0008]
[Problems to be solved by the invention]
This invention is made in view of the above-mentioned problem, and makes it a subject to make a bowl move only in a horizontal surface with a vertical leaf | plate spring.
[0009]
[Means for Solving the Problems]
The above-described objects are as follows: a vertical vibration electromagnet having a first electromagnetic coil, a horizontal vibration electromagnet having a second electromagnetic coil, a bowl having a spiral track formed on the inner peripheral wall, and the bowl attached An upper movable frame, a lower movable frame disposed below the upper movable frame, an outer peripheral edge of the upper movable frame, and an outer peripheral edge of the lower movable frame extending vertically. In an elliptical vibration parts feeder comprising a vertical leaf spring and a horizontal leaf spring that has a central portion attached to the lower movable frame and both ends attached to a fixed frame and extends horizontally,
The upper movable frame and the lower movable frame each have a protrusion projecting radially on the outer peripheral edge, and both ends of the vertical leaf spring are fixed to both side surfaces of the protrusion ,
In the radially inward towards than the projection of the front Symbol lower movable frame, upper and lower mounting a central portion of the horizontal plate spring across the said lower movable frame, said upper movable frame and the both ends of the horizontal plate spring This is solved by an elliptical vibration parts feeder characterized in that a spacer having the same thickness as that of the lower movable frame is interposed and fixed to the fixed frame .
[0010]
With the above configuration, the upper end of the spring is vibrated almost only in the horizontal direction because both ends of the vertical leaf spring increase the torsional bending rigidity with respect to the vertical component at the arm portion of the upper movable frame and the arm portion of the lower movable frame. To do. Therefore, the bowl is moved only in the horizontal direction by the horizontal excitation force. Furthermore, the central part of the horizontal leaf spring is the arm part of the lower movable frame, and both end parts of the horizontal leaf spring are spacers of the same thickness as the arm part of the lower movable frame to increase the torsional bending rigidity for the horizontal component. ing. Accordingly, the horizontal direction is not affected by the vertical direction, and the vertical direction is not affected by the horizontal direction, and the constant amplitude control in the horizontal direction and the vertical direction can be reliably performed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an elliptical vibration part feeder according to an embodiment of the present invention will be described.
[0012]
FIG. 1 shows the whole of an elliptical vibration parts feeder. Reference numeral 10 denotes a bowl in which a spiral track 11 is formed on an inner peripheral wall, and is fixed at the center by a bolt 12 to a driving part described in detail later. Yes.
[0013]
2 and 3 show a state in which the bowl 10 is removed, and is a perspective view of the elliptical vibration drive unit. As will be described later, the vertical frame electromagnet and a pair of horizontal excitations that are opposed to each other in the radial direction. 8 are provided on the outer peripheral edge of the upper movable frame 6 to which the bowl 10 is attached. The protrusions extending in the radial direction are provided perpendicular to the other protrusions 6a. Both ends of the laminated leaf spring 5 are fixed with bolts.
[0014]
Further, as clearly shown in FIGS. 4, 6, 8, and 9, vertical vibration leaf springs 15a, 15b, 15c, and 15d are fixed to the central portion by the arm portion of the lower frame 3, Both end portions are fixed to the upper and lower surfaces of the leaf spring mounting portion 1a of the fixed frame 1 by bolts b. As clearly shown in FIG. 3, the movable core 31 of the above-described electromagnet for vertical excitation force is fixed to the lower surface of the upper movable frame 6, and the electromagnet 32 is fixed to the center of the fixed frame 1 with a gap therebetween. Has been. In addition, a pair of electromagnets for horizontal excitation force is fixed in the radial direction of the fixed frame 1, which is composed of a movable core 21 and an electromagnet 22 that are fixed to the upper movable frame 6 and hang downward. Yes.
[0015]
When a voltage is applied to these electromagnets 32 and 22 with a predetermined phase difference as described later, a current flows with this phase difference in the vertical direction and the horizontal direction. Perform elliptical torsional vibration. According to the present invention, the horizontal leaf springs 15a to 15d that are paired up and down as described above are inserted through the arm portion 3a of the lower movable frame 3, and the block 1a is inserted at both ends. Its thickness is the same as that of the arm portion 3a.
[0016]
The vertically extending leaf spring 5 determines the resonance frequency of the horizontal component of the bowl 10, and the vertical resonance frequency is determined by horizontally disposed leaf springs 15a, 15b, 15c, 15d. In general, in elliptical vibration, a voltage is applied to the electromagnet 22 for horizontal excitation force so as to approximately match the horizontal resonance frequency, but a predetermined phase difference is applied to the electromagnet 22 for horizontal excitation. Then, a voltage having the same frequency is applied, and driving is performed at a frequency shifted from the resonance point.
[0017]
FIG. 10 is a cross-sectional view of the drive unit of the elliptical vibration parts feeder. As is clear from this, an E-type electromagnet 32 is disposed at the center of the fixed frame 1, and an electromagnetic coil 32a is wound around the E-type electromagnet 32. . Electromagnets 21a and 21b for horizontal excitation are attached to both sides in the radial direction, and electromagnetic coils 22a and 22b are wound around this. The lower end portion of the vertical leaf spring 5 is fixed to the distal end portion 3a of the arm portion of the lower movable frame 3 by inserting it as shown in the figure. As is apparent from this figure, the vertical vibration leaf springs 15a to 15d are located radially inward from the distal end portion 3a of the arm portion to which the horizontal vibration leaf spring 5 is attached. Although not shown in other drawings, L is a lead wire for connecting a power source to the electromagnetic coils 32a, 22a, and 22b.
[0018]
FIG. 11 shows the drive control circuit of the above elliptical vibration parts feeder. The elliptical vibration parts feeder itself is schematically shown, and the bowl 10 has the horizontal vibration leaf spring 5 and the vertical vibration leaf spring as described above. 15a to 15d are supported on the ground, and the pair of horizontal electromagnets typically show only one electromagnetic coil 22, and the vertical electromagnetic coil 30 is also shown schematically. Although not shown in FIG. 1, a vertical vibration measurement pickup 58 is provided in the vicinity of one end of any one of the vertical vibration leaf springs 15a to 15d. In addition, a pickup 40 for detecting horizontal vibration is disposed in the vicinity of the horizontal vibration leaf spring 5 disposed vertically. This pickup 40 is connected to the horizontal sensor amplifier 43 via the electric line W ₁ , and this output is connected to the resonance point tracking control circuit 37 and the A / D converter 51.
[0019]
Details of the resonance point tracking control circuit 37 are shown in FIG. 12, but its output is supplied to the PWM control circuit 54, and its output is further amplified by the power amplifier 42 and supplied to the horizontal electromagnetic coil 22. . In the present embodiment, the horizontal amplitude is controlled at a constant amplitude, and a horizontal command amplitude circuit 52 for instructing the desired horizontal amplitude is provided. This output is a PI (Proportional Integral) control circuit (proportional integral control). Circuit) 53, and this output is supplied to the PWM control circuit 54 described above. On the other hand, the output of the resonance point tracking control circuit 37 is supplied to the phase difference control circuit 56 belonging to the vertical vibration driving block via the electric line W ₄ . Further, the output of the above-described vertical vibration detection pickup 58 is supplied via a vertical sensor amplifier 59, and the output of the sensor amplifier 59 is also supplied to the vertical amplitude via an A / D converter 62. Is connected to a PI control circuit 61 for controlling the constant amplitude of the. A vertical amplitude command control circuit 60 is connected to this, and the output of this control circuit 60 is supplied to the PWM control circuit 63. The phase difference control circuit 56 supplies a voltage having a predetermined phase difference to the vertical coil 32, but the output of the phase difference command circuit 57 is supplied to the phase difference control circuit 56, and the vertical vibration is picked up by the pickup 58. The phase difference between the mechanical vibration and the voltage supplied from the resonance point tracking control circuit 37 is the output of the phase difference command circuit 57. The PWM control circuit 63 is supplied with a voltage having a phase difference that gives a predetermined phase difference angle (for example, 60 degrees) by mechanical vibration. The output of the control circuit 63 is supplied to the vertical coil 32 via the power amplifier 64. The phase difference θ of the voltage is determined by how far the resonance frequency of the vertical vibration system is apart from that of the horizontal vibration system, and varies in the range of −90 degrees to +90 degrees.
[0020]
FIG. 12 shows details of the resonance point tracking control circuit 37 in FIG. 11, which mainly comprises a variable frequency power supply 40, a phase detection circuit 41 and a memory 45. The variable frequency power source 40 is connected to the AC power source 8 via the switch S, and the output is connected to the electromagnetic coil 22 of the electromagnet 21 via the amplifier 42.
Further, the output of the pickup 40 in FIG. 5 is connected to the amplifier 43 through the electric line W ₁ . This amplified output is supplied to the phase detection circuit 41. The phase detection circuit 41 is further supplied with the output of the variable frequency power supply 40 via the electric line W ₃ , and this phase detection output is connected to the variable frequency power supply 40. This may be an inverter, for example.
[0021]
When the switch S is closed, the AC power source 38 is connected to the variable frequency power source 40 and is in a driving state. This output voltage is supplied to the electromagnetic coil 22 of the electromagnet 21 via the PWM control circuit 54 and the amplifier 42. Thereby, the bowl 10 of the elliptical vibration parts feeder of this Embodiment is given the torsional vibration force of a horizontal direction.
[0022]
The pickup 40 detects the vibration displacement in the horizontal direction, is amplified by the amplifier 43, and is applied to the phase detection circuit 41. On the other hand, the voltage applied to the electromagnetic coil 22 at this time is supplied thereto.
[0023]
FIG. 14 shows the change over time of the applied voltage V. Due to the electromagnetic coil 22, a temporary delay occurs, and the current I flowing through the electromagnetic coil 22 changes as shown in FIG. 14B. Due to this current, an alternating magnetic attractive force is generated between the electromagnet 22 and the bowl 10, and the bowl 10 is given a horizontal torsional vibration displacement. As shown in FIG. If positive vibration displacement S ₁ namely the zero crossing point of the coil voltage V is changed from positive to negative when the delayed voltage V and 90 degrees according to the coil 22 as shown in FIG. 13, the resonance point omega ₀ (angular Since the phase difference φ is 90 degrees at the frequency), the phase detection circuit 41 determines that the frequency should be increased to be smaller than ω ₀ , and the output frequency of the variable frequency power supply 40 is increased. This is amplified by the amplifier 12 via the PWM control circuit 54 and is passed through the coil 22 of the electromagnet 21 to vibrate the bowl 10 with a current having a higher frequency. By approaching the resonance point ω _{0 from} the previous time, the amplitude increases. When the output frequency of the variable frequency power supply 40 further increases and finally exceeds ω ₀ and becomes higher than this, the relationship between the vibration displacement S ₂ and the coil voltage V becomes 270 degrees in phase difference as shown in FIGS. 14A and 14D. .
[0024]
As apparent from the relationship between the angular frequency of force and the phase difference φ of the vibration displacement in FIG. 13, the output frequency of the variable frequency power supply 40 is decreased because the resonance point ω ₀ is passed.
[0025]
As described above, when the output frequency of the variable frequency power supply 40 is increased or decreased, the vibrating parts feeder is driven at the resonance frequency in the horizontal direction.
[0026]
As described above, the horizontal vibration system performs resonance vibration, but the output of the resonance point tracking control circuit 37 is supplied to the phase difference control circuit 56 via the electric wire W _4. In response to the output of the pickup 58 for detecting the voltage, a voltage that causes this phase difference is generated based on the command of the phase difference command 57 and supplied to the PWM control circuit 63. In response to the output from the vertical amplitude command circuit 60 and the PI control circuit 61 based on this output, a voltage for giving a constant amplitude is amplified by the power amplifier 4 and then supplied to the vertical coil 32. Therefore, the bowl 10 is vibrated in the vertical direction with the phase difference set by the phase difference command circuit 57 in the vertical direction. Therefore, the bowl 10 can perform desired elliptical vibration.
[0027]
In the spiral track 11 in the bowl 10 of the vibrating parts feeder, the parts are aligned by the parts aligning means so as to have a predetermined posture. This posture is supplied to the next process.
[0028]
When the switch S is opened to stop the driving of the vibrating parts feeder, the output from the variable frequency power supply 40 is lost and the driving of the bowl 10 is stopped. The non-volatile memory 45 stores the output frequency of the variable frequency power supply 40 before the switch S is turned off. That is, the frequency during steady driving is stored.
[0029]
When the switch S is closed to start driving the vibration parts feeder again, the variable frequency power source 40 is driven to output the resonance frequency stored in the memory 45 at this time. Therefore, the bowl 10 of the vibrating parts feeder is driven at the resonance frequency in the horizontal direction from the beginning. Accordingly, there is no shock when moving from forced vibration to the resonance frequency, and the power source capacity can be reduced.
[0030]
Hereinafter, whenever the driving is repeated, the contents of the memory 45 are rewritten every time the driving is stopped. However, the resonance frequency of the vibrating parts feeder fluctuates in units of one month or one year. Therefore, if the resonance frequency is track-controlled each time, a large amount of current must be passed to move from forced vibration to resonance vibration. Since driving can be started at the previous resonance frequency, the vibration parts feeder can always be driven with a small power supply capacity without shock.
[0031]
In the above configuration, the vertical vibration leaf springs 15a, 15b, 15c, and 15d are a pair of upper and lower leaf springs, and the lower movable frame 3 having a large thickness is interposed between them at the center. The bending stress from the center to one end is increased, and the height from the plate springs 15a to 15d for vertical vibration to the bowl 10 is made smaller than before, so that the bowl 10 has an unbalanced mass distribution (note that (The illustration is not unbalanced, but in reality, various attachments are attached to form an unbalanced mass distribution.) it can.
[0032]
Further, according to the present invention, FIG. 19 shows a bending state of the conventional horizontal diaphragm spring 9, but as described above, the deflection is greatly displaced not only in the horizontal direction but also in the vertical direction. Thereby, the bowl 2 'vibrates not only in the horizontal direction but also in the vertical direction. FIG. 18 shows a state of attachment of the horizontal vibration leaf spring 5 according to the present invention. As described above, the two pieces are inserted by inserting the protrusion 6a of the upper movable frame 6 and the protrusion 3a of the lower movable frame 3 as described above. The laminated leaf spring 5 is fixed on both sides. As shown in FIG. 20, in this fixing method, according to the embodiment of the present invention, screw holes 51 are formed in the protrusions 6a and 3a, and bolts 50 are formed in the upper and lower ends of the leaf spring 5 in this. It is inserted into the bolt insertion hole 5a (via the spacer S), inserted into the bolt insertion hole of the leaf spring 5 through the shaft portion 50a, and the nut N is screwed and tightened to the shaft portion 50a via the spacer S. It is fixed with respect to the movable frame 6 and the lower movable frame 3. By such a fixing method, conventionally, an insertion hole that is sufficiently larger than the shaft hole of the bolt hole, that is, the bolt shaft, is formed in the mounting portion corresponding to the protrusions 6a and 3a, and the bolt is inserted into this through the shaft portion. The leaf springs were fixed at both ends by screwing and tightening the nuts. In such a case, when adjusting the thickness and number of leaf springs, if the nuts are removed, they are naturally fixed to the protrusions. The plate springs that have been swayed on both sides change the height from the bowl, and the leaf springs also have fool holes. There is a case where the resonance frequency which is expected after the adjustment is not obtained after the adjustment, or a beautiful elliptical vibration cannot be obtained.
[0033]
However, according to the embodiment of the present invention, since the screw holes 51 are formed in the protrusions 6a and 3a and screwed to the protrusions 6a and 3a, the laminated leaf springs are formed on one side of the protrusions 6a and 3a as shown in FIG. Therefore, the thickness and number of the stacked leaf springs can be adjusted without moving the leaf springs on the other side.
[0034]
As described above, according to the embodiment of the present invention, the upper movable frame 6 and the lower movable frame 3 are fixed to the protrusions 6a and 3a. As shown in FIG. 18, the lower end portion of the leaf spring 5 is hardly displaced, but the upper end portion is displaced from the position indicated by the alternate long and short dash line to the position indicated by the solid line. As is apparent from this figure, the bowl 10 is displaced only in the horizontal direction and hardly displaced in the vertical direction only by the horizontal vibration by the configuration of the present invention. This makes it difficult to cause the twisted deflection as shown in FIG. 19 by inserting the protrusions 6a and 3a. That is, a large bending rigidity is exhibited in the vertical deflection. As a result, the bowl 10 can be moved almost only in the horizontal direction by the horizontal excitation force. Therefore, the bowl can receive the ideal desired elliptical vibration by receiving the vertical excitation force, and the constant amplitude control is performed in the vertical and horizontal directions as described above. It can be controlled quickly and accurately. If the vertically extending leaf spring 9 as shown in FIG. 19 is bent, the bowl is displaced in the vertical direction by the downward displacement.
In addition to the vibration displacement caused by the original vertical excitation force, the control may be confused so that it takes a considerable time to reach a predetermined amplitude, or the predetermined amplitude may not be achieved.
[0035]
Further, according to the embodiment of the present invention, the horizontal leaf springs 15a to 15d are inserted through the arm portions of the lower movable frame 3 and fixed at both ends thereof via the spacers 1a having the same thickness. Since it is fixed to the frame 1 side, when the attachment is attached to the bowl 10 and the mass distribution becomes unbalanced with respect to the center, the conventional elliptical vibration parts feeder causes vibration unevenness, and the transfer speed of the parts on the track However, even if there is an unbalanced mass distribution in the bowl, this configuration eliminates vibration unevenness and makes the transfer speed uniform. Further, as shown in FIG. 7, the plate springs 15a to 15d are attached radially inward from the circumference on which the vertically extending leaf spring 5 is located, so that the bowl 10 is in the vertical and horizontal directions. It is less susceptible to vibrations in other directions and provides ideal elliptical vibrations. In particular, the moment of inertia of the bowl 10 determines the resonance frequency for horizontal torsional vibration. However, if the diameter of the bowl increases, the moment of inertia increases, and the vertically extending leaf spring has a smaller circumference. In this case, the horizontal torsional vibration of the bowl is unstable, but a leaf spring 5 is attached at a position farthest from the outside as shown in the figure, Since the plate springs 15a to 15d for vertical vibration are arranged on the top, the bowl 10 is not affected by vibration in the horizontal direction in the vertical direction regardless of the large diameter, and is also affected by the vertical direction in the horizontal direction. The ideal elliptical vibration described above is generated.
[0036]
The embodiment of the present invention has been described above. Of course, the present invention is not limited to this, and various modifications can be made based on the technical idea of the present invention.
[0037]
For example, in the above embodiment, the lower movable frame 3 has a substantially cross shape. However, when the number of the vertical leaf springs 5 is further increased, the number of the arm portions 3a can be further increased. Good. Correspondingly, the number of plate springs for vertical vibration for attaching the central portion to each arm portion is not limited to 4 as in the embodiment, and may be 6 sets or 8 sets, for example.
[0038]
Further, in the above embodiment, the four vertical leaf springs 5 are arranged at intervals of 90 degrees. However, the vertical leaf springs 5 may be provided at eight positions at even smaller angular intervals, for example, 45 degrees.
[0039]
【The invention's effect】
According to the elliptical vibration parts feeder of the present invention, the bowl can be vibrated only in the horizontal direction by the horizontal excitation force. Furthermore, the bowl can be vibrated only in the vertical direction by the vertical excitation force. Therefore, ideal elliptical vibration can be generated.
[Brief description of the drawings]
FIG. 1 is a perspective view of an elliptical vibration parts feeder according to an embodiment of the present invention.
FIG. 2 is a perspective view of an elliptical vibration drive unit showing a situation where a bowl is removed.
FIG. 3 is a partially broken perspective view with a part broken away in FIG. 2;
FIG. 4 is a side view of the same.
FIG. 5 is a plan view of the same.
FIG. 6 is a side view seen from the other side.
FIG. 7 is a bottom view.
FIG. 8 is a side view seen from the other side.
FIG. 9 is a front view.
10 is a cross-sectional view taken along the line [10]-[10] in FIG. 9;
FIG. 11 is a drive control circuit for driving the elliptical vibration parts feeder according to the embodiment of the present invention.
FIG. 12 is a detailed diagram of a resonance point tracking control circuit in the circuit.
FIG. 13 is a chart showing the relationship between the angular frequency and the phase difference for explaining the operation of the circuit.
FIG. 14 shows signal waveforms for showing the same action; A is a coil voltage waveform, B is a coil current waveform, C is a vibration displacement waveform, and D is another vibration displacement waveform.
FIG. 15 is a partially broken side view of a conventional elliptical vibration parts feeder.
16 is a cross-sectional view in the direction [16]-[16] in FIG.
FIG. 17 is a bottom view of the same.
FIG. 18 is a partially enlarged cross-sectional view illustrating the operation of the vertical leaf spring according to the present invention.
FIG. 19 is a partially enlarged perspective view for explaining the operation of a conventional vertical leaf spring.
FIG. 20 is a partially broken enlarged front view for explaining the adjustment operation of the vertical leaf spring according to the embodiment of the present invention.
[Explanation of symbols]
3 Lower movable frame 5 Leaf spring for horizontal vibration

Claims (2)

An electromagnet for vertical vibration having a first electromagnetic coil, an electromagnet for horizontal vibration having a second electromagnetic coil, a bowl having a spiral track formed on the inner peripheral wall, and an upper movable frame for mounting the bowl A lower movable frame disposed below the upper movable frame, and a vertically extending vertical leaf spring that couples an outer peripheral edge of the upper movable frame and an outer peripheral edge of the lower movable frame. In the elliptical vibration parts feeder comprising a horizontal leaf spring attached to the lower movable frame at its center and both ends attached to the fixed frame and extending horizontally,
The upper movable frame and the lower movable frame each have a protrusion projecting radially on the outer peripheral edge, and both ends of the vertical leaf spring are fixed to both side surfaces of the protrusion ,
The central part of the horizontal leaf spring is attached to the lower side of the lower movable frame, and the center of the horizontal leaf spring is vertically installed across the lower movable frame, and the same as the lower movable frame at both ends of the horizontal leaf spring. An elliptical vibration parts feeder, wherein a spacer having a thickness is interposed and fixed to the fixed frame . Screw holes are formed in the protrusions of the upper movable frame and the lower movable frame, bolts inserted through the bolt through holes of the vertical leaf springs are screwed into these screw holes, and nut screws are attached to the shaft ends of the bolts. The elliptical vibration parts feeder according to claim 1 , wherein the vertical leaf spring is fixed by being attached and tightened .

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