JP2012041107A - Vibration-type component conveying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the occurrence of the vertical vibration caused by the horizontal vibration at low cost in a composite vibration-type component conveying device.SOLUTION: In a vibration-type component conveying device configured such that an intermediate vibrator 4 is provided between a base 3 and an upper vibrator 2 to which a trough (a component conveying member) is mounted with the intermediate vibrator 4 and the base 3 coupled by a leaf spring 5 for horizontal vibration, and the upper vibrator 2 and the intermediate vibrator 4 coupled by a leaf spring 6 for vertical vibration, the leaf spring 5 for horizontal vibration is fixed at two fixed positions on the same horizontal line orthogonal to a component conveying direction. Thus, it is possible to suppress the occurrence of the vertical vibration caused by the horizontal vibration at low cost. Thereby, when adjusting the horizontal vibration and the vertical vibration, respectively, the horizontal vibration can be adjusted almost without affecting the vertical vibration, thereby easily achieving the desired vibration suitable for the component conveyance.

Description

  The present invention relates to a vibration type component conveying apparatus that conveys a component by vibrating a component conveying member by driving an excitation mechanism.

  The vibration-type component conveying device has a configuration that can adjust the horizontal vibration and the vertical vibration of the component conveying member for the purpose of giving the component conveying member the optimum vibration for component conveyance. There is a formula (for example, see Patent Document 1).

  As shown in FIG. 9, the component conveying apparatus described in Patent Document 1 includes an intermediate vibrating body 54 between a support member 52 of a trough (component conveying member) 51 and a base 53 installed on the floor. The base plate 53 and the intermediate vibrating body 54 are connected by a first plate spring (horizontal vibration plate spring) 55 directed in the vertical direction, and a second plate spring (vertical vibration plate spring) directed in the horizontal direction. 56. The trough support member 52 and the intermediate vibrating body 54 are coupled by 56, and a first vibration mechanism 58 that generates horizontal vibration between the connection plate 57 fixed to the trough 51 and the base 53 and the vertical direction. A second vibration mechanism 59 that generates directional vibrations is provided.

  Each of the vibration mechanisms 58 and 59 includes AC electromagnets 60 and 61 installed on the base 53 and a vibration plate 62 attached to the connection plate 57, and the electromagnets 60 of the vibration mechanisms 58 and 59. , 61 can be separately controlled to adjust the horizontal vibration and the vertical vibration of the trough 51, respectively.

  However, in the composite vibration type component conveying device as described above, since the horizontal vibration leaf springs are fixed at two fixed positions in the vertical direction, as shown in FIG. When it vibrates in the horizontal direction, a vibration having an amplitude Z is also generated in the vertical direction, and the vertical vibration caused by the horizontal vibration is added to the vertical vibration generated by the second vibration mechanism. Is transmitted to the component conveying member. Accordingly, the horizontal vibration of the component conveying member cannot be adjusted so as not to affect the vertical vibration, and it is difficult to actually apply the desired vibration to the component conveying member.

  On the other hand, if the vibration in the vertical direction of the component conveying member is detected and the detected value is fed back to the applied voltage setting circuit of the vibration mechanism for vertical vibration, the set voltage is controlled. There is a possibility that vibration can be realized, but in that case, a vibration sensor and feedback control circuit are required separately, and the load on the electromagnet also increases, which may significantly increase the manufacturing cost and running cost. Inevitable.

JP-A-55-84707

  SUMMARY OF THE INVENTION An object of the present invention is to suppress generation of vertical vibration caused by horizontal vibration at a low cost in a composite vibration type component conveying apparatus.

  In order to solve the above problems, the present invention provides a component conveying member in which a component conveying path is formed, an upper vibrating body to which the component conveying member is attached, a base installed on a floor, and the upper vibrating body. An intermediate vibrating body provided between the base, a first elastic member connecting the intermediate vibrating body and the base, and a second elastic member connecting the upper vibrating body and the intermediate vibrating body. One of the first elastic member and the second elastic member is a horizontal vibration elastic member and the other is a vertical vibration elastic member, and the horizontal vibration elastic member and the first vibration mechanism are used as parts. In the vibration-type component conveying apparatus that applies a horizontal vibration to the conveying member and applies a vertical vibration to the component conveying member by the vertical vibration elastic member and the second vibration mechanism. Elastic member on the same horizontal line perpendicular to the parts conveying direction It was to fix at a fixed position locations. As a result, as shown in FIG. 11, the horizontal vibration elastic member B is not deformed in the horizontal direction and does not lead to the vertical displacement, and it is caused by the vibration in the horizontal direction even if no expensive control means is provided. The occurrence of vertical vibration is suppressed.

  On the other hand, the elastic member for vertical vibration is fixed at two fixed positions on the same horizontal line orthogonal to the component conveying direction, or fixed at two fixed positions on the same horizontal line parallel to the component conveying direction. That's fine.

  Further, by making the natural frequency of the horizontal vibration elastic member different between the horizontal direction and the vertical direction, or by making the vertical rigidity of the horizontal vibration elastic member higher than the rigidity in the horizontal direction. Further, it is possible to more effectively suppress the vertical vibration caused by the horizontal vibration.

  In the above configuration, as the horizontal vibration elastic member, a leaf spring having the front and back surfaces directed in the component conveyance direction can be used. Preferably, a plate spring having the front and back surfaces directed in the component conveyance direction is preferably used. It is good to use what provided the spacer between the fixed locations of each leaf | plate spring, arranging in multiple numbers along. As shown in FIG. 12, when the moment is applied to the intermediate vibrating body due to the inclination at the time of installation of the first vibration mechanism, the horizontal vibration elastic member is a single leaf spring having low torsional rigidity. Since the leaf spring C is twisted, this twist becomes torsional vibration accompanying horizontal vibration, causing the intermediate vibrating body to generate pitching vibration in the component conveyance direction, making it difficult to achieve the desired vibration optimal for component conveyance. is there. That is, even when a moment acts on the intermediate vibration member by using a member having a high torsional rigidity with a spacer interposed between a plurality of leaf springs as the elastic member for horizontal vibration, the elastic member for horizontal vibration as shown in FIG. The twist of D is suppressed and it becomes easy to realize a desired vibration.

  On the other hand, as the vertical vibration elastic member, a leaf spring whose front and back surfaces are directed in the vertical direction can be used.

  Each excitation mechanism is composed of an electromagnet and a movable iron core, a reference waveform generating means for generating a reference waveform of an applied voltage in an applied voltage setting circuit to one of the electromagnets, and an amplitude with respect to the reference waveform Waveform amplitude adjusting means for adjusting is provided, and the applied voltage setting circuit for the other electromagnet is generated by the phase difference adjusting means for generating a waveform having a predetermined phase difference with respect to the reference waveform, and the phase difference adjusting means By providing waveform amplitude adjustment means to adjust the amplitude of the waveform so that the waveform, period, phase difference and amplitude of the voltage applied to each electromagnet can be controlled freely, horizontal vibration and vertical vibration Can be easily brought close to the desired vibration.

  In addition, the voltage setting circuit for applying voltage to the electromagnet of each of the vibration mechanisms is provided with PWM signal generating means for converting a waveform whose amplitude is adjusted by the waveform amplitude adjusting means to a PWM (Pulse Width Modulation) signal, Each excitation mechanism can be driven by the PWM method.

  As described above, the vibration type component conveying apparatus according to the present invention fixes the horizontal vibration elastic member that connects the upper vibrating body or the base and the intermediate vibrating body to two places on the same horizontal line orthogonal to the component conveying direction. Since it is fixed at the position, the occurrence of vertical vibration due to horizontal vibration is suppressed. Therefore, when adjusting the vibration in the horizontal direction and the vertical direction, the horizontal vibration can be adjusted so as to hardly affect the vertical vibration, and a desired vibration suitable for component conveyance can be easily realized. . Moreover, this configuration does not require a feedback control means and can be constructed at a low cost.

Front sectional view of the component conveying apparatus of the first embodiment Top view without trough in FIG. Side view of FIG. Schematic diagram of an applied voltage setting circuit of each excitation mechanism of the component conveying apparatus of FIG. Front sectional drawing which shows the modification of arrangement | positioning of the leaf | plate spring for vertical vibrations of FIG. Top view without trough in FIG. Front sectional view of the component conveying apparatus of the second embodiment Top view without trough in FIG. Front view of conventional parts conveyor Explanatory drawing of vibration behavior of conventional leaf spring for horizontal vibration Explanatory drawing of the normal deformation | transformation form of the elastic member for horizontal vibrations of this invention Explanatory drawing of torsional deformation of the elastic member for horizontal vibration of the present invention Explanatory drawing of the deformation | transformation form of another elastic member for horizontal vibrations of this invention

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8. 1 to 3 show a vibration type component conveying apparatus according to the first embodiment. In this component conveying device, a trough (component conveying member) 1 in which a linear conveying path 1a is formed is attached to the upper surface of an upper vibrator 2, and between the upper vibrator 2 and a base 3 installed on the floor. An intermediate vibration body 4 is provided, the intermediate vibration body 4 and the base 3 are connected by a leaf spring 5 as a first elastic member, and the upper vibration body 2 and the intermediate vibration body 4 are a plate as a second elastic member. A first vibration mechanism 7 is provided which is connected by a spring 6 and generates a horizontal vibration between the intermediate vibration body 4 and the base 3, and a vertical vibration is generated between the upper vibration body 2 and the base 3. A second vibration mechanism 8 to be generated is provided.

  The base 3 is provided with columnar leaf spring mounting portions 3a at both ends thereof, and is supported by a vibration isolating member (not shown) such as a vibration isolating rubber fixed to the floor surface.

  The intermediate vibration body 4 is formed in a rectangular frame shape, and its edge in the short direction is opposed to the upper end of the leaf spring mounting portion 3a of the base 3 on the outer surface side, and the lower portion of the upper vibration body 2 on the inner surface side. Are arranged to face each other. Further, at the four corners on the outer peripheral side, leaf spring mounting portions 4a are provided that protrude in the component conveying direction (left and right direction in the figure).

  The first leaf spring 5 has its one end at the leaf spring mounting portion of the base 3 so that the front and back surfaces are oriented in the component conveyance direction, and the fixed positions of both ends are located on the same horizontal line orthogonal to the component conveyance direction. The other end portion is fixed to the leaf spring mounting portion 4a of the intermediate vibrator 4 to 3a, thereby forming a horizontal vibration leaf spring (horizontal vibration elastic member) that supports the intermediate vibrator 4 so as to vibrate in the horizontal direction. Yes. The horizontal vibration leaf spring 5 has a horizontal thickness dimension that is considerably smaller than the vertical width dimension, the natural frequency in the horizontal direction is significantly different from the natural frequency in the vertical direction, and the rigidity in the vertical direction is horizontal. It is sufficiently higher than the rigidity in the direction.

  On the other hand, the second leaf spring 6 has one end at the bottom of the upper vibrator 2 so that the front and back surfaces are oriented vertically and the fixed positions of both ends are located on the same horizontal line perpendicular to the component conveying direction. The other end portion is fixed to the edge in the longitudinal direction of the intermediate vibrating body 4 to form a vertical vibration leaf spring (vertical vibration elastic member) that supports the upper vibrating body 2 so as to vibrate in the vertical direction.

  The first vibrating mechanism 7 includes an AC electromagnet 9 installed on the base 3 and a movable iron core 10 attached to the intermediate vibrating body 4 so as to face the electromagnet 9 with a predetermined interval. It consists of Although the movable iron core 10 is attached to the intermediate vibrator 4 in this example, it may be attached to the upper vibrator 2. On the other hand, the second vibration mechanism 8 includes an AC electromagnet 11 installed on the base 3, and a movable iron core 12 attached to the upper vibrator 2 so as to face the electromagnet 11 with a predetermined interval. It consists of

  When the electromagnet 9 of the first vibration mechanism 7 is energized, an intermittent electromagnetic attractive force acts between the electromagnet 9 and the movable iron core 10, and due to this electromagnetic attractive force and the restoring force of the horizontal vibration leaf spring 5, A horizontal vibration is generated in the intermediate vibrating body 4, and this vibration is transmitted to the upper vibrating body 2 and the trough 1 through the vertical vibration leaf spring 6. Further, when the electromagnet 11 of the second vibration mechanism 8 is energized, an intermittent electromagnetic attractive force acts between the electromagnet 11 and the movable iron core 12, and this electromagnetic attractive force and the restoring force of the vertical vibration leaf spring 6. As a result, vertical vibrations are generated in the upper vibrating body 2 and the trough 1. And the components supplied to the trough 1 are conveyed along the linear conveyance path 1a by this horizontal vibration and vertical vibration.

  Therefore, the horizontal vibration and the vertical vibration of the trough 1 can be adjusted by separately setting the voltages applied to the electromagnets 9 and 11 of the vibration mechanisms 7 and 8.

  FIG. 4 shows a circuit for setting an applied voltage to the electromagnets 9 and 11 of the excitation mechanisms 7 and 8. The circuit of the first vibration mechanism 7 is provided with a reference waveform generating means 13 for generating a reference waveform of the applied voltage. The reference waveform generation means 13 generates a reference waveform corresponding to the set value of the type of waveform (for example, sine wave) and the period (frequency) of the waveform. On the other hand, the circuit of the second excitation mechanism 8 is provided with phase difference adjusting means 14 for generating a waveform having a predetermined phase difference with respect to the reference waveform generated by the reference waveform generating means 13.

  In each of the excitation mechanisms 7 and 8, the waveform generated by the reference waveform generating means 13 or the phase difference adjusting means 14 is adjusted to a predetermined amplitude by the waveform amplitude adjusting means 15, and the PWM signal generating means 16 After conversion to a PWM signal, the voltage is amplified by the voltage amplifying means 17 and applied to the electromagnets 9 and 11. Thus, the horizontal vibration and the vertical vibration can be adjusted by freely controlling the waveform, period, phase difference, and amplitude of the voltage applied to the electromagnets 9 and 11, respectively. Note that when each excitation mechanism is not driven by the PWM method, the PWM signal generating means 16 becomes unnecessary.

  This vibration type component conveying apparatus has the above-described configuration, and when vibration is generated in the intermediate vibrating body 4 by driving the first vibrating mechanism 7, two fixed positions on the same horizontal line orthogonal to the component conveying direction. The horizontal vibration leaf spring 5 fixed in step 1 is repeatedly deformed only in the horizontal direction and returned to the original state (see FIG. 11). Thereby, the vibration generated in the intermediate vibrating body 4 hardly includes vertical vibration, and is substantially only in the horizontal direction.

  Further, since the horizontal vibration leaf spring 5 has a large difference between the natural frequency in the horizontal direction and the natural frequency in the vertical direction, the occurrence of vertical vibration due to the vibration in the horizontal direction can also be suppressed.

  That is, in general, when trying to increase the component conveying speed with a complex vibration type component conveying device, each excitation mechanism is uniquely designed in the horizontal direction of the trough in order to efficiently increase the amplitude of horizontal vibration with less power. It is often driven at a frequency near the frequency. At this time, if the horizontal vibration frequency and the vertical vibration frequency of the horizontal vibration leaf spring are the same, or if they are only a few Hz apart, the intermediate vibration body generated by the horizontal vibration The vibration in the vertical direction cannot be ignored. However, in the component conveying device of this embodiment, since there is a sufficient difference between the natural frequency in the horizontal direction and the natural frequency in the vertical direction of the horizontal vibration leaf spring 5, the vertical vibration of the intermediate vibrating body 4 caused by the horizontal vibration. The vibration in the direction can be kept small.

  Here, the horizontal vibration leaf spring can make a difference between the natural frequency in the horizontal direction and the natural frequency in the vertical direction even when the horizontal thickness dimension is larger than the vertical width dimension, for example. From the viewpoint of rigidity to be described later, it is preferable to adopt the shape as in this embodiment.

  That is, in this embodiment, since the horizontal dimension of the horizontal vibration leaf spring 5 is formed to be considerably smaller than the vertical dimension, and the vertical rigidity thereof is sufficiently higher than the horizontal rigidity, the intermediate vibrator The vertical vibration of 4 can be further reduced.

  As described above, in the component conveying device of this embodiment, the vertical vibration generated in the trough 1 is substantially only the vibration by the second vibration mechanism 8 and the vertical vibration leaf spring 6, so that the horizontal and vertical When adjusting the vibration in each direction, the horizontal vibration can be adjusted so as to hardly affect the vertical vibration, and a desired vibration suitable for parts conveyance can be easily applied to the trough 1.

  5 and 6 show a modification of the arrangement of the vertical vibration leaf spring 6 of the first embodiment described above. In this modification, the vertical vibration leaf spring 6 is moved in the short direction of the upper vibration body 2 and the intermediate vibration body 4 at two fixed positions on the same horizontal line parallel to the component conveying direction (left-right direction in the figure). It is fixed to the edge.

  7 and 8 show a second embodiment. In this embodiment, the intermediate vibrating body 4 and the base 3 are connected by an elastic member 18 for horizontal vibration instead of the plate spring 5 for horizontal vibration of the first embodiment. The elastic member 18 for horizontal vibration has two leaf springs 19 with the front and rear surfaces facing the component conveyance direction (left and right in the figure) arranged along the component conveyance direction, and between the fixed portions of the plate springs 19. A spacer 20 is provided, and is fixed at two fixed positions on the same horizontal line orthogonal to the component conveying direction, like the horizontal vibration leaf spring 5 of the first embodiment. The configuration of the other parts is the same as that of the first embodiment including the voltage setting circuit applied to the electromagnets 9 and 11 of the vibration mechanisms 7 and 8.

  In the component conveying device of the second embodiment, the torsional rigidity of the horizontal vibration elastic member 18 is higher than that of the horizontal vibration leaf spring 5 of the first embodiment. Thus, even when a moment acts on the intermediate vibrating body 4, the horizontal vibration elastic member 18 is deformed only in the substantially horizontal direction without being twisted (see FIG. 13). Therefore, it is easier to realize a desired vibration suitable for component conveyance than the apparatus of the first embodiment.

  In the second embodiment as well, as in the example shown in FIGS. 5 and 6, the vertical vibration leaf spring 6 is placed at the upper vibration body at two fixed positions on the same horizontal line parallel to the component conveying direction. 2 and the intermediate vibrating body 4 may be fixed to the lateral edges.

  In each of the above-described embodiments, the first leaf spring that connects the intermediate vibration body and the base is a horizontal vibration leaf spring, and the second leaf spring that connects the upper vibration body and the intermediate vibration body is for vertical vibration. Although the leaf spring is used, conversely, the first leaf spring may be a vertical vibration leaf spring and the second leaf spring may be a horizontal vibration leaf spring. In addition, one leaf spring is disposed at each location, but two or more leaf springs may be used in an overlapping manner. In addition, the leaf springs are arranged at four locations for horizontal vibration and vertical vibration, but may be configured at two or more locations.

  Furthermore, in each embodiment, a leaf spring is used for the horizontal vibration elastic member and the vertical vibration elastic member, but an elastic member other than the leaf spring can also be used. Moreover, although each vibration mechanism uses what consists of an electromagnet and a movable iron core, it is not restricted to this, What is necessary is just an actuator which can generate | occur | produce the same vibration force.

1 trough (component conveying member)
2 Upper vibration body 3 Base 4 Intermediate vibration body 5 First leaf spring (leaf spring for horizontal vibration)
6 Second leaf spring (plate spring for vertical vibration)
7 First vibration mechanism 8 Second vibration mechanism 9, 11 Electromagnets 10, 12 Movable iron core 18 Horizontal vibration elastic member 19 Leaf spring 20 Spacer

Claims (10)

  A component conveying member in which a component conveying path is formed, an upper vibrator to which the component conveying member is attached, a base installed on a floor, and an intermediate vibrator provided between the upper vibrator and the base; A first elastic member that connects the intermediate vibration body and the base, and a second elastic member that connects the upper vibration body and the intermediate vibration body, the first elastic member and the second elastic member. One of the elastic members is an elastic member for horizontal vibration, the other is an elastic member for vertical vibration, and the horizontal vibration elastic member and the first vibration mechanism impart horizontal vibration to the component conveying member, In the vibration type component conveying apparatus configured to apply vertical vibration to the component conveying member by the vertical vibration elastic member and the second vibration mechanism, the horizontal vibration elastic member is orthogonal to the component conveying direction. Fixed at two fixed positions on the horizon Vibratory parts feeder for.   The vibration type component conveying apparatus according to claim 1, wherein the vertical vibration elastic member is fixed at two fixed positions on the same horizontal line orthogonal to the component conveying direction.   The vibration type component conveying apparatus according to claim 1, wherein the vertical vibration elastic member is fixed at two fixed positions on the same horizontal line parallel to the component conveying direction.   The vibration type component conveying apparatus according to any one of claims 1 to 3, wherein the natural frequency of the horizontal vibration elastic member is different between a horizontal direction and a vertical direction.   5. The vibration-type component conveying device according to claim 1, wherein the horizontal vibration elastic member has a vertical rigidity higher than a horizontal rigidity.   The vibration type component conveying apparatus according to any one of claims 1 to 5, wherein a plate spring having front and rear surfaces directed in a component conveying direction is used as the elastic member for horizontal vibration.   As the horizontal vibration elastic member, a plurality of leaf springs whose front and back surfaces are directed in the component conveying direction are arranged along the component conveying direction, and a spacer is provided between fixed portions of the leaf springs. The vibration type component conveying apparatus according to any one of claims 1 to 5.   The vibration type component conveying apparatus according to any one of claims 1 to 7, wherein a leaf spring having front and back surfaces directed in a vertical direction is used as the vertical vibration elastic member.   Each excitation mechanism is composed of an electromagnet and a movable iron core, a reference waveform generating means for generating a reference waveform of an applied voltage in an applied voltage setting circuit to one of the electromagnets, and an amplitude with respect to the reference waveform Waveform amplitude adjusting means for adjusting is provided, and the applied voltage setting circuit for the other electromagnet is generated by the phase difference adjusting means for generating a waveform having a predetermined phase difference with respect to the reference waveform, and the phase difference adjusting means 9. The vibration type component conveying apparatus according to claim 1, further comprising a waveform amplitude adjusting unit that adjusts an amplitude with respect to the waveform.   10. A PWM signal generating means for converting a waveform, the amplitude of which is adjusted by the waveform amplitude adjusting means, into a PWM signal in the applied voltage setting circuit for the electromagnet of each of the vibration mechanisms. The vibratory component conveying device according to 1.

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