WO2013069416A1

WO2013069416A1 - Vibrating article-conveying apparatus

Info

Publication number: WO2013069416A1
Application number: PCT/JP2012/076681
Authority: WO
Inventors: 石河　智海
Original assignee: Ntn株式会社
Priority date: 2011-11-07
Filing date: 2012-10-16
Publication date: 2013-05-16
Also published as: CN103946132B; TWI609827B; TW201341286A; CN103946132A; KR101977429B1; KR20140094587A

Abstract

The invention makes it possible to apply a selected vibration that is appropriate for article conveyance easily on an article-conveying member of a compound vibration article-conveying apparatus. A vibrating article-conveying apparatus in which: a middle vibrator (4) is provided between an upper vibrator (2) on which a trough (article-conveying member) is installed and a base (3); the middle vibrator (4) and the base (3) are connected with two horizontal vibration plate springs (5); and the upper vibrator (2) and the middle vibrator (4) are connected with vertical vibration plate springs (6). In the vibrating article-conveying apparatus, the respective horizontal vibration plate springs (5) are fixed at two fixing positions on the same horizontal line that is orthogonal to the direction of article conveyance (x-direction) and are disposed so that the positional relationships of the two fixing positions switch in the direction of article conveyance. The occurrence of vibration in the vertical direction arising from vibration in the horizontal direction can thereby be limited and vibration in the horizontal plane in the direction orthogonal to the direction of article conveyance (y-direction) can also be limited. As a result, a selected vibration that is appropriate for article conveyance can easily be applied to the trough.

Description

Vibrating parts conveyor

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.

In the vibration type component conveying device, the base and the intermediate vibrating body are connected by a horizontal vibration leaf spring directed in the vertical direction for the purpose of imparting optimum vibration to the component conveying member to the component conveying member, A composite that can adjust the horizontal (vertical) direction vibration and vertical vibration of the component conveying member by connecting the component conveying member and the intermediate vibrator with a vertical vibration leaf spring in the horizontal direction. There is a vibration type (see, for example, Patent Document 1).

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, vibration is also generated in the vertical direction when vibrating in the horizontal direction. I will let you. In addition, there is usually a difference between the center of gravity G of the component conveying member (including the upper vibrator attached to the component) and the height position of the fulcrum, so when the component conveying member is displaced in the horizontal direction, Rotational motion (hereinafter referred to as “pitching motion”) occurs. Therefore, a desired vibration cannot be actually applied to the component conveying member, and there is a problem that stable component conveyance is difficult.

In contrast, the present applicant fixes the horizontal vibration elastic member (such as a leaf spring) at two fixed positions on the same horizontal line orthogonal to the component conveying direction, so that the horizontal deformation is vertical. A technology has been developed that prevents the occurrence of vibration in the vertical direction caused by vibration in the horizontal direction (part conveyance direction) (Patent Document 2).

On the other hand, in Patent Document 3, in a composite vibration type component conveying device, a pair of vertical vibration leaf springs is set as one set, and arranged so as to constitute a ramen structure together with a component conveying member and an intermediate vibrating body, thereby causing a pitching motion. It has been proposed to prevent the occurrence of

JP 55-84707 A JP2012-41107A Japanese Patent Laid-Open No. 2003-40418

By the way, in Patent Document 2, since it is possible to arrange the horizontal vibration leaf springs at two or more locations, for example, a vibration type component conveying device in which the horizontal vibration leaf springs are arranged as shown in FIGS. It is done. In this component conveying apparatus, an intermediate vibrating body 54 is provided between an upper vibrating body 52 and a base 53 to which a trough (component conveying member) 51 having a linear conveying path 51a is attached. The base 53 is connected by two horizontal vibration plate springs 55, the upper vibration body 52 and the intermediate vibration body 54 are connected by four vertical vibration plate springs 56, and the horizontal direction (component conveying direction, X in the figure). Direction) and a second vibration mechanism 58 that generates vibration in the vertical direction (Z direction in the figure). The two horizontal vibration leaf springs 55 have one end on one side of the base 53 (the lower side in FIG. 16) so that the fixed positions at both ends are located on the same horizontal line perpendicular to the component conveying direction (X direction). The leaf spring mounting portion 53a is fixed to the leaf spring mounting portion 53a erected on the left side of FIG. 17 and the other end portion is provided on the other side of the intermediate vibrator 54 (upper side of FIG. 16, right side of FIG. 17). It is fixed to 54a.

In the component conveying apparatus in which the horizontal vibration leaf springs 55 are arranged as described above, the positional relationship between the positions of the horizontal vibration leaf springs 55 fixed to the intermediate vibrating body 54 and the positions fixed to the base 53 is the same. When the intermediate vibrating body 54 is vibrated in the component conveying direction (X direction), as shown in FIG. 18, the horizontal vibration leaf spring 55 is not only in the X direction but also in the direction perpendicular to the X direction (Y direction) in the horizontal plane. In addition, a vibration having an amplitude y is generated. The vibration in the Y direction is transmitted to the trough 51, causing the parts to meander on the transport path 51a and causing a substantial decrease in the part transport speed. In addition to the vibration in the X direction and the Z direction being applied to the trough 51, it is difficult to adjust the vibration of the trough 51 to be optimal for component conveyance.

Also, in the component conveying device in which the vertical vibration leaf spring is arranged as proposed in Patent Document 3, the component conveying member becomes longer or the mass increases depending on the properties of the component to be conveyed, the structure of the component supply partner, and the like. In such a case, the pitching motion may occur because the moment around the center of gravity G of the component conveying member increases. Further, when the component conveying member has an asymmetric shape and the position of the center of gravity G is deviated from the attracting position of the electromagnet constituting the vibrating mechanism, the attraction force acts on the position deviated from the center of gravity G. A moment around the center of gravity G is generated by the force, and a pitching motion is generated.

On the other hand, even in a general composite vibration type component conveying device described in Patent Document 1 or the like, a vibration isolating rubber, a coil spring, or the like is provided between the base and the floor surface in order to block propagation of vibration to the outside. When a vibration isolation member is provided, the reaction force of the attractive force generated by the electromagnet of the vibration excitation mechanism and the reaction force accompanying the vibration of the parts transport member generate a moment around the center of gravity G 'of the base, generating a pitching motion. Let The pitching motion around the center of gravity G 'of the base also affects the vibration of the component conveying member, and causes a pitching motion around the center of gravity G of the component conveying member.

As described above, in the conventional composite vibration type component conveying device, the occurrence of the pitching motion around the center of gravity G of the component conveying member cannot be reliably suppressed, and the occurrence of the pitching motion causes the horizontal vibration of the component conveying member. There is a possibility that the vertical vibration cannot be adjusted to a desired value, and the parts conveyance becomes unstable.

An object of the present invention is to make it possible to easily apply a desired vibration suitable for component conveyance to a component conveyance member in a composite vibration type component conveyance device.

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. A plurality of elastic members are provided in the component conveying direction, The fixed position to the intermediate vibrator and the fixed position to the base or upper vibrator are located on the same horizontal line orthogonal to the parts transport direction, and the positional relationship between the two fixed positions is alternate in the parts transport direction. It was supposed to be arranged so as to be replaced. Thus, the occurrence of vibration in the workpiece transport direction of the horizontal vibration elastic member E _A vertical direction (Z direction) caused by vibration of the (X-direction) is suppressed, as shown in FIG. 19, the parts conveying direction in a horizontal plane Since vibration in a direction orthogonal to the direction can be suppressed, desired vibration suitable for component conveyance can be easily applied to the component conveyance member.

Here, when a vibration isolating member is provided between the base and the floor surface, the pitching motion of the component conveying member viewed from the floor is relative to the base of the component conveying member (hereinafter simply referred to as “relative”). And the pitching motion of the base in the opposite phase to each other. Therefore, a weight is provided on the base, and the amplitude of the pitching motion of the base is relative to the component conveying member. By adjusting the mass of the base so as to approach the amplitude of the pitching motion, it is possible to reliably suppress the pitching motion of the component conveying member viewed from the floor.

For example, when the moment acting on the component conveying member is small (when the component conveying member is short or when the mass is small), the amplitude of the relative pitching motion of the component conveying member becomes small. The amplitude of the pitching motion of the table may be reduced. On the other hand, when the moment acting on the component conveying member is large (when the component conveying member is long or when the mass is large), the amplitude of the relative pitching motion of the component conveying member becomes large. What is necessary is just to enlarge the amplitude of the pitching motion of a base.

Even if the mass of the component conveying member is adjusted, the same effect as described above can be obtained. However, when the mass of the component conveying member is increased, the natural frequency of the component conveying member is reduced. Since the drive frequency (vibration frequency) set near the natural frequency is also reduced, the parts conveyance speed is slowed and the load on the electromagnet of the vibration mechanism is increased, so it is better to adjust the mass of the base desirable.

The weight is composed of a plurality of weight pieces, and the weight can be adjusted by increasing / decreasing the number of the weight pieces, and is preferably provided at the end of the base. This is because as the portion that changes the mass of the base is farther from the center of gravity, the influence of the increase / decrease in the mass on the amplitude of the pitching motion increases, and the mass adjustment becomes easier.

Moreover, it is desirable to provide the weights at a plurality of locations. If the mass is changed at only one location on the base, the center of gravity of the base moves, and the center of the pitching movement is shifted, making adjustment difficult. However, if multiple weights are installed, the center of gravity of the base will not move. This is because the mass of the weight can be adjusted. Conversely, by adjusting the mass of the weights provided at a plurality of locations and moving the position of the center of gravity of the base to the vicinity of the center of the apparatus, it is possible to stabilize the transport behavior. Further, even if the installation position of the weight can be adjusted in the vertical direction, the center of gravity of the base can be moved to the vicinity of the center of the apparatus so that a stable transport behavior can be obtained.

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. 20, when the moment is applied to the intermediate vibrating body due to the inclination at the time of installation of the first vibrating mechanism, the horizontal vibration elastic member is a single leaf spring with low torsional rigidity. the twisting plate spring E _B, the torsion is generated pitching vibrations to parts conveying direction intermediate vibrator is a vibration torsional accompanying horizontal vibrations, since it is difficult to achieve the optimum desired vibration to the parts conveyance It is. That is, by using a member having a high torsional rigidity with a spacer sandwiched between a plurality of leaf springs as a horizontal vibration elastic member, even when a moment acts on the intermediate vibration member, the horizontal vibration elastic member as shown in FIG. The twist of E _C is suppressed, and desired vibration can be easily realized.

On the other hand, as the vertical vibration elastic member, a leaf spring having front and back surfaces 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 excitation mechanisms is provided with PWM signal generating means for converting a waveform whose amplitude is adjusted by the waveform amplitude adjusting means into 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 includes the horizontal vibration elastic member that connects the upper vibration body or the base and the intermediate vibration body, the fixed position to the intermediate vibration body, and the base or the upper vibration. Since the fixed position to the body is located on the same horizontal line orthogonal to the component conveyance direction and the positional relationship is alternately switched in the component conveyance direction, the horizontal vibration elastic member in the component conveyance direction is arranged. It is possible to suppress both the vibration in the vertical direction caused by the vibration and the vibration in the direction orthogonal to the component conveying direction in the horizontal plane.

Then, by providing a weight on the base, the mass of the base is adjusted so that the amplitude of the pitching motion of the base approaches the amplitude of the pitching motion relative to the base of the component conveying member that is in the opposite phase to this. By adjusting, the pitching motion of the component conveying member as viewed from above the floor can be surely suppressed, and thus desired vibration can be easily applied to the component conveying member, and stable component conveyance can be realized.

Partially cutaway front 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. FIG. 1 is a partially cutaway front view showing a modification of the arrangement of the vertical vibration leaf springs of FIG. Top view without trough in FIG. The front view of the simple model of the components conveying apparatus for demonstrating the effect | action of this invention a and b are explanatory diagrams of the pitching motion in the simple model of FIG. A graph showing the behavior of pitching motion of a general parts conveyor The graph which shows the behavior of the pitching motion of the component conveying apparatus of FIG. A graph showing the behavior of another pitching motion of a general parts conveyor The graph which shows the behavior of another pitching motion of the components conveying apparatus of FIG. Partially cutaway front view of the component conveying apparatus of the second embodiment Top view without trough of FIG. Partial cutaway front view of a conventional parts conveyor Top view without trough in FIG. Side view of FIG. Explanatory drawing of the vibration behavior of the horizontal vibration leaf spring of FIG. 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 the drawings. 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 two leaf springs 5 as first elastic members, and the upper vibration body 2 and the intermediate vibration body 4 are four second elastic members. A first vibration mechanism 7 is provided which is connected by a plate spring 6 as a member, and generates a vibration in the horizontal direction (component conveying direction, X direction in the figure) between the intermediate vibrating body 4 and the base 3. A second vibration mechanism 8 that generates vibration in the vertical direction (Z direction in the figure) is provided between the vibrating body 2 and the base 3.

The base 3 is formed in a rectangular shape, and columnar leaf spring mounting portions 3a are erected at two diagonal corners of the base 3, and a vibration isolating rubber (vibration isolating member) 18 fixed to the floor surface F is provided. It is supported. In addition, you may use a coil spring etc. for a vibration proof member.

Further, weights 19 are provided at both ends of the base 3 in the component conveying direction. Each of these weights 19 includes a plurality of detachable weight pieces 19a, and the mass can be adjusted by increasing or decreasing the number of the weight pieces 19a. Here, although illustration is omitted, the method of attaching the weight 19 to the base 3 can be a method of providing a through hole in each weight piece 19a and screwing it with a bolt or the like. At this time, a plurality of screw holes provided in the base 3 are arranged in the height direction so that the mounting position of the weight 19 on the base 3 can be adjusted in the vertical direction, thereby stabilizing the transport behavior. It becomes possible to easily move the position of the center of gravity of the base 3 to the vicinity of the center of the apparatus and to avoid interference between the weight 19 and other equipment. In this embodiment, the weight 19 is composed of a plurality of weight pieces 19a, but a weight having a desired mass alone may be used.

The intermediate vibrating body 4 is formed in a rectangular frame shape, and two diagonal corners thereof are opposed to the upper end portion of the leaf spring mounting portion 3a of the base 3 on the outer peripheral side, and the inner peripheral surface is a lower portion of the upper vibrating body 2. Are arranged to face each other. Further, on the outer peripheral surface, a leaf spring mounting portion 4a is provided that protrudes in the component conveying direction (X direction) from two diagonal corners that do not face the leaf spring mounting portion 3a of the base 3.

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. Here, the two leaf spring mounting portions 3a of the base 3 and the two leaf spring mounting portions 4a of the intermediate vibrating body 4 intersect so that straight lines connecting the installation positions of the same mounting portion intersect in plan view. Since they are provided, the two horizontal vibration leaf springs 5 are arranged so that the positional relationship between the two fixed positions thereof is switched in the component conveying direction.

Further, the horizontal vibration leaf spring 5 has a thickness dimension in the horizontal direction that is considerably smaller than a width dimension in the vertical direction, 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 also different. Is sufficiently higher than the rigidity in the horizontal 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 voltage 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

vibration 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 S is repeatedly deformed only in the horizontal direction and returned to the original state (see FIG. 19). Thereby, the vibration generated in the intermediate vibrating body 4 hardly includes vertical vibration, and is substantially only in the horizontal direction. In addition, since the positional relationship between the fixed positions of the two horizontal vibration leaf springs 5 is arranged so as to be interchanged in the component conveyance direction, the direction in the direction perpendicular to the component conveyance direction (Y direction in FIGS. 2 and 3) in the horizontal plane Vibration can also be suppressed.

Also, since the horizontal vibration plate spring 5 has a large difference between the natural frequency in the horizontal direction and the natural frequency in the vertical direction, this also suppresses the occurrence of vertical vibration due to the vibration in the horizontal direction.

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 apparatus 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, and the component conveying direction in the horizontal plane. Since the vibration in the direction orthogonal to the horizontal direction can also be suppressed, by adjusting the horizontal vibration and the vertical vibration respectively, it is possible to easily give the trough 1 a desired vibration suitable for component conveyance.

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 (X direction in the figure). It is fixed to the edge.

Next, the operation of the weight 19 in the above-described first embodiment will be described with reference to FIGS. FIG. 7 shows a simple model of a composite vibration type component conveying apparatus. The upper rigid body A in this simple model corresponds to the trough 1 (including the upper vibrating body 2) of the first embodiment. The spring Ka corresponds to the vertical vibration leaf spring 6, the lower rigid body B corresponds to the intermediate vibration body 4 and the base 3, and the spring Kb corresponds to the vibration isolating rubber 18. The center of gravity Ga represents the center of gravity of the upper rigid body A, and the center of gravity Gb represents the center of gravity of the lower rigid body B. Actually, the intermediate vibrating body 4 and the base 3 are connected by a horizontal vibration leaf spring 5, but the horizontal vibration leaf spring 5 does not act in the vertical direction, and therefore is not considered in this simple model.

Using the simple model, the vertical vibration behavior of a general composite vibration type component conveying apparatus is represented. As shown in FIGS. 8A and 8B, the upper rigid body A moves pitching around the center of gravity Ga. Then, the lower rigid body B performs a pitching motion around the center of gravity Gb. FIG. 8A shows a case where the amplitude of the relative pitching motion of the upper rigid body A with respect to the lower rigid body B is smaller than the amplitude of the pitching motion of the lower rigid body B. FIG. 8B is the reverse of FIG. This is the case.

FIG. 9 shows temporal changes in the vertical displacement at the point A1 of the upper rigid body A and the point B1 of the lower rigid body B in FIG. 7 in the case where the component conveying device takes the vibration behavior of FIG. is there. The dotted line in FIG. 9 is the relative displacement of point A1 viewed from point B1 (relative pitching motion of the upper rigid body A), the alternate long and short dash line is the absolute displacement of point B1 viewed from above the floor (pitching motion of the lower rigid body B), and the solid line is This is the absolute displacement (pitching motion of the upper rigid body A) at point A1 as seen from above the floor (the same applies to FIGS. 10 to 12 described later). The relative displacement at the point A1 and the absolute displacement at the point B1 are in opposite phases, and the combination is the absolute displacement at the point A1. In this case, in the component conveying device of the first embodiment, by reducing the mass of the lower rigid body B (the mass of the weight 19 provided on the base 3), the amplitude of the pitching motion of the lower rigid body B as shown in FIG. Can be made closer to the amplitude of the relative pitching motion of the upper rigid body A, and the pitching motion of the upper rigid body A can be suppressed.

FIG. 11 shows temporal changes in the vertical displacement at the point A1 of the upper rigid body A and the point B1 of the lower rigid body B when the component conveying device takes the vibration behavior of FIG. In this case, in the component conveying device of the first embodiment, by increasing the mass of the lower rigid body B (the mass of the weight 19 provided on the base 3), the pitching motion of the lower rigid body B as shown in FIG. Can be made close to the amplitude of the relative pitching motion of the upper rigid body A, and the pitching motion of the upper rigid body A can be suppressed.

Actually, as the pitching motion of the upper rigid body A decreases, the pitching motion of the lower rigid body B also decreases, so that the relative displacement at the point A1 and the absolute displacement at the point B1 shown in FIGS. 10 and 11 also decrease.

As described above, in the component conveying device of this embodiment, the vibration isolating rubber 18 is provided between the base 3 and the floor surface F, the weight 19 is provided on the base 3, and the pitching motion of the base 3 is reduced. By adjusting the mass of the base 3 so that the amplitude is close to the amplitude of the relative pitching movement of the trough 1 with respect to the base 3 having the opposite phase, the pitching movement of the trough 1 seen from the floor is ensured. Therefore, stable parts conveyance can be realized.

FIG. 13 and FIG. 14 show a second embodiment. In this embodiment, the intermediate vibrating body 4 and the base 3 are connected by an elastic member 20 for horizontal vibration instead of the plate spring 5 for horizontal vibration of the first embodiment. The elastic member 20 for horizontal vibration has two leaf springs 21 with the front and rear surfaces facing the component conveying direction (X direction in the figure) arranged along the component conveying direction, and between the fixed portions of the plate springs 21. A spacer 22 is provided, which 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, and the positions of the two fixed positions. The relationship is arranged so that the relationship is changed in the component conveyance direction. Also, the vertical vibration leaf spring 6 is short 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, as in the example shown in FIGS. It is fixed to the edge in the hand direction. 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 20 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 20 is deformed only in the substantially horizontal direction without being twisted (see FIG. 21). Therefore, in the apparatus of the first embodiment, it is easy to realize desired vibration suitable for component conveyance, as compared with the case where the horizontal vibration leaf spring 5 may be twisted (see FIG. 20).

In the second embodiment as well, as in the example shown in FIGS. 1 to 3, the vertical vibration leaf spring 6 is placed at two fixed positions on the same horizontal line orthogonal to the component conveying direction at the upper vibration body. 2 and the intermediate vibration body 4 may be fixed to the longitudinal 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. Further, one leaf spring is arranged at each location, but two or more leaf springs may be used as one.

In addition, although the horizontal vibration leaf springs are arranged in two places, they may be constituted by three or more places. In this case, the positional relationship between the fixed position to each intermediate vibrator and the fixed position to the base is a component. What is necessary is just to arrange | position so that it may alternate by the conveyance direction. On the other hand, the vertical vibration leaf springs are arranged at four locations, 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 Vibration-proof rubber (vibration-proof member)
19 Weight 19a Weight piece 20 Horizontal vibration elastic member 21 Leaf spring 22 Spacer

Claims

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, a plurality of the horizontal vibration elastic members are provided in the component conveying direction. , The fixed position to each of the intermediate vibrators and the The fixed position to the base or the upper vibrating body is located on the same horizontal line orthogonal to the component conveying direction, and the positional relationship between the two fixed positions is alternately arranged in the component conveying direction. Vibratory component conveyor.
2. The vibration type component conveying apparatus according to claim 1, wherein a weight is provided on the base.
An anti-vibration member is provided between the base and the floor, and the mass of the base is adjusted so that the amplitude of the pitching motion of the base approaches the amplitude of the pitching motion relative to the base of the component conveying member. The vibration type component conveying apparatus according to claim 2, wherein
4. The vibration type component conveying apparatus according to claim 2, wherein the weight is composed of a plurality of weight pieces, and the mass can be adjusted by increasing or decreasing the number of the weight pieces.
5. The vibration type component conveying apparatus according to claim 2, wherein the weight is provided at an end of the base.
6. The vibratory component conveying apparatus according to claim 2, wherein the weight is provided at a plurality of locations.
The vibration type component conveying apparatus according to any one of claims 2 to 6, wherein an installation position of the weight can be adjusted in a vertical direction.
The vibration type component conveying apparatus according to any one of claims 1 to 7, wherein the elastic member for vertical vibration 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 any one of claims 1 to 7, wherein the elastic member for vertical vibration is fixed at two fixed positions on the same horizontal line parallel to the component conveying direction.
10. The vibration type component conveying apparatus according to claim 1, wherein the natural frequency of the elastic member for horizontal vibration is made different between a horizontal direction and a vertical direction.
11. The vibratory component conveying apparatus 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 11, wherein a plate spring having front and rear surfaces directed in a component conveying direction is used as the horizontal vibration elastic member.
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 claim 1.
The vibration type component conveying apparatus according to any one of claims 1 to 13, wherein a plate spring having a front and back surfaces directed in a vertical direction is used as the elastic member for vertical vibration.
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 15. The vibratory component conveying apparatus according to claim 1, further comprising a waveform amplitude adjusting unit that adjusts an amplitude with respect to the waveform.
16. A circuit for setting a voltage applied to an electromagnet of each of the excitation mechanisms is provided with PWM signal generating means for converting a waveform whose amplitude is adjusted by each of the waveform amplitude adjusting means into a PWM signal. The vibratory component conveying device according to 1.