JP6163343B2 - Vibrating parts conveyor - Google Patents

Description

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

  In the vibratory parts conveyor, an alignment supply trough and a return trough, which convey parts linearly in opposite directions, are arranged side by side at a slight interval, and the parts are circulated between the troughs. There is a type that corrects the posture and supplies only the parts in a desired posture to the next process.

  In the parts conveying apparatus that corrects the posture while circulating the parts as described above, the leaf springs 23 that respectively support the alignment supply trough 21 and the return trough 22, as shown in the simplified models of FIGS. , 24 are tilted in opposite directions and attached to the base 25, and the troughs 21 and 22 are placed in the horizontal direction (component conveying direction, X direction in the figure) and the vertical direction (Z in the figure) by a vibration mechanism (not shown). The components on the component conveyance path of each trough 21 and 22 are conveyed in directions opposite to each other.

  Here, conventionally, the alignment supply trough 21 and the return trough 22 are vibrated with the same phase and the same amplitude, and the horizontal reaction force received by the base 25 due to the vibration of the troughs 21 and 22 is canceled out. Thus, the propagation of vibration from the base 25 to the installation surface on which the base 25 is fixed is suppressed, and the influence on the operation of other devices installed on the same installation surface is reduced (for example, (See Patent Document 1).

JP 58-144010 A

  However, in the conventional component conveying apparatus as described above, as shown in FIG. 8, the center of gravity G1 of the alignment supply trough 21 and the center of gravity G2 of the return trough 22 are identical in the X direction and the Z direction. It is not on the XZ plane (the Y direction in the figure is the direction orthogonal to the X direction in the horizontal plane). Therefore, when a displacement in the A direction is applied to the alignment supply trough 21 and a displacement in the B direction is applied to the return trough 22, a leaf spring on one side (the upper side in the figure) of the base 25 is shown in FIG. A reaction force F1 in the B direction due to the displacement of the alignment supply trough 21 is applied to the fixing portion 25a, and a reaction in the A direction due to the displacement of the return trough 22 is applied to the leaf spring fixing portion 25b on the other side (lower side in the figure). Force F2 acts. These reaction forces F1 and F2 generate a moment around the vertical axis (Z axis) passing through the center of gravity G3 of the base 25.

  Therefore, the base 25 generates a rotational motion in the horizontal plane (XY plane), so-called yawing motion. This yawing motion is also generated in the troughs 21 and 22 via the leaf springs 23 and 24. If the vibration frequency of each trough 21 or 22 is increased or the vibration displacement is increased in order to increase the component conveyance speed, the vibration force generated in the component conveyance direction (X direction) increases at the same time. Since F1 and F2 also increase, the yawing movement of each trough 21 and 22 becomes large. This yawing motion causes the parts to meander on the parts conveyance path of each trough 21 and 22 and causes a substantial reduction in the parts conveyance speed.

  Accordingly, an object of the present invention is to suppress yawing motion of a component conveying unit of a vibration type component conveying apparatus that linearly conveys a component by vibration generated by a plurality of vibration generating mechanisms.

  In order to solve the above problems, the present invention provides a component having a substantially horizontal linear component conveyance path by at least two sets of vibration generating mechanisms having an exciting force generating function, a restoring force generating function, and a guiding function. In the vibration type component conveying apparatus that conveys a component on the component conveying path in the component conveying direction by generating a vibration including a component in the component conveying direction along the component conveying path and a component in the vertical direction in the conveying unit. The center of gravity of each vibrating body to which vibration is applied by the generating mechanism is arranged on the same plane constituted by the component conveying direction and the vertical direction, or on the same straight line substantially parallel to the component conveying direction. .

  Here, a component conveying member in which a component conveying path is formed, a component conveying unit composed of an upper vibrating body to which the component conveying member is attached, a base installed on a floor, the upper vibrating body and the base A first elastic member that has a restoring force generating function and a guiding function, a counter vibrating body and the base, and a second elastic member that has a restoring force generating function and a guiding function, and the upper vibration. In the vibration-type component transport device including a vibration generating mechanism including a vibration mechanism that applies a vibration force to each of the body and the counter vibrating body, the second elastic member is orthogonal to the component transport direction in the horizontal plane. The first elastic member is disposed between the second elastic members, or the first elastic member is disposed in a direction orthogonal to the component conveying direction in the horizontal plane. 2 or more To provided, it may be so disposed the second elastic member between each other the first elastic member.

  As described above, according to the vibration type component conveying device of the present invention, the position of the center of gravity of each vibrating body to which vibration is applied by a plurality of vibration generating mechanisms is arranged on the same plane constituted by the component conveying direction and the vertical direction. Alternatively, since they are arranged on the same straight line substantially parallel to the component conveyance direction, the yawing motion of the component conveyance unit can be suppressed, and vibration optimal for component conveyance can be realized.

Partially cut away front view of the component conveying apparatus according to the first embodiment, excluding troughs. Top view of FIG. Right side view of FIG. Front view of component conveying apparatus of second embodiment Top view of FIG. Right side view of FIG. Front view of a simplified model of a conventional parts conveyor 7 is a top view of the simplified model of FIG. 7 (description of yawing motion) Top view of the base of the simple model of FIG. 7 (Explanatory diagram of yawing motion)

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 6. 1 to 3 show a vibration type component conveying apparatus according to the first embodiment. In this component conveying device, a first leaf spring (first plate) in which an upper vibrating body 1 to which an alignment supply trough (component conveying member) (not shown) is attached is provided near the center of both short sides of a substantially rectangular base 2. 1 elastic member) 3. On the other hand, a rectangular frame-like counter vibrating body 4 to which a trough for return (component conveying member) (not shown) is attached surrounds (but does not contact) the upper vibrating body 1 and is provided at the four corners of the base 2. Is supported by a plate spring (second elastic member) 5. In addition, the base 2 may be fixed directly on the floor (or an installation base on the floor), or may be fixed on the floor via a vibration-proof member such as a vibration-proof rubber or a vibration-proof spring.

  The upper vibrating body 1 (including the alignment supply trough) and the counter vibrating body 4 (including the return trough) are respectively centered in the width direction (the direction perpendicular to the component conveying direction and the horizontal plane, the Y direction in the figure). And a symmetrical shape with respect to the XZ plane P extending in the horizontal direction (component conveying direction, X direction in the figure) and in the vertical direction (Z direction in the figure). Each trough is formed with a substantially horizontal linear part conveyance path (not shown).

  The first leaf spring 3 and the second leaf spring 5 are tilted in opposite directions and attached to the base 2, and on the component conveying path of the alignment supply trough by vibration generated by an excitation mechanism described later. The parts and the parts on the parts conveyance path of the return trough are conveyed in opposite directions.

  An electromagnet 6 is installed on the base 2, and movable iron cores 7 and 8 are installed on the upper vibrating body 1 and the counter vibrating body 4 at positions facing the electromagnet 6 with a predetermined interval. The electromagnet 6 and the movable iron cores 7 and 8 constitute a vibration mechanism that applies a vibration force to the upper vibration body 1 and the counter vibration body 4.

  Here, since the movable iron cores 7 and 8 of the excitation mechanism are arranged so as to face each other with the electromagnet 6 interposed therebetween, when the electromagnet 6 is energized to apply an attractive force, the upper vibrator 1 and the counter vibrator 4 is displaced in the reverse direction in the component conveyance direction (X direction).

  In other words, the component conveying device includes two sets of vibration generating mechanisms including an exciting mechanism having an exciting force generating function and first and second leaf springs 3 and 5 having a restoring force generating function and a guiding function. A component conveying direction (X along the component conveying path) in each of the first component conveying unit composed of the alignment supply trough and the upper vibrating body 1 and the second component conveying unit composed of the return trough and the counter vibrating body 4 The components on the component conveyance path of each trough are conveyed in directions opposite to each other in the component conveyance direction by generating a vibration composed of a component in the direction) and a component in the vertical direction (Z direction).

  The upper vibrator 1 (including the alignment supply trough) and the counter vibrator 4 (including the return trough) have the same mass, and the spring constants of the first leaf spring 3 and the second leaf spring 5 are the same. Is set to As a result, the natural frequencies of both vibrators 1 and 4 match and the frequency response is the same, so that the vibration waveform of both vibrators 1 and 4 in the X direction can be obtained no matter what frequency the electromagnet 6 is driven. Is out of phase. Normally, the electromagnet 6 is driven at a frequency in the vicinity of the natural frequency of both the vibrators 1 and 4 to generate resonance so that it can be vibrated efficiently with a small amount of power or a large vibration amplitude can be obtained. .

  And in this component conveying apparatus, since the upper vibrating body 1 and the counter vibrating body 4 are symmetrical with respect to the XZ plane P passing through the center in the Y direction, the center of gravity of each vibrating body 1, 4 is also the same XZ. It is on the plane P. For this reason, the reaction force of the vibration generated in each of the vibrating bodies 1 and 4 is also generated on the XZ plane P. The reaction forces are opposite to each other in the X direction as in the case of the vibrations of the vibrating bodies 1 and 4 and cancel each other, so that no moment around the vertical axis (Z axis) passing through the center of gravity of the base 2 is generated.

  Therefore, yawing motion does not occur in each component conveyance unit, and vibration optimal for component conveyance can be realized.

  In the first embodiment, the counter vibrating body 4 is disposed so as to surround the upper vibrating body 1 disposed in the center of the apparatus, but the arrangement of both vibrating bodies may be reversed.

  In applications where a return trough is not required, a weight having a mass corresponding to this can be installed instead of the return trough. Alternatively, as in the second embodiment shown in FIGS. 4 to 6, the return trough is eliminated, the alignment supply trough 10 is divided into two trough members 11, 12, and one trough member 11 is subjected to upper vibration. While attaching the other trough member 12 to the counter vibration body 4 to the body 1, the second leaf spring 5 may be inclined in the same direction as the first leaf spring 3.

  In the second embodiment, the mass of each trough member 11 and 12 is smaller and the natural frequency is higher than in the case where the alignment supply troughs are integrally formed, so that driving at a higher frequency is possible. The parts conveyance speed can be increased.

  In each of the above-described embodiments, the gravity center positions of the upper vibrating body 1 and the counter vibrating body 4 are arranged on the same plane (XZ plane) P configured by the component conveying direction (X direction) and the vertical direction (Z direction). However, the same effect can be obtained by arranging them on the same straight line (for example, the X axis passing through the approximate center of the upper vibrator 1) substantially parallel to the component conveying direction.

  The first and second leaf springs 3 and 5 are arranged such that the second leaf springs 5 are provided at two or more locations in the Y direction, and the first leaf springs are disposed between the second leaf springs 5. 3 is disposed, but conversely, the first leaf springs may be provided at two or more locations in the Y direction, and the second leaf springs may be disposed between the first leaf springs. .

  Further, although the counter vibrating body 4 has an integral shape, it may be divided and connected by screws or the like.

  Furthermore, although the electromagnet 6 and the leaf springs 3 and 5 are used for the generation of vibration, any actuator may be used as long as it can generate the same vibration such as a piezoelectric element. Moreover, it can replace with the integral electromagnet 6 and can arrange | position two electromagnets which have the same function, such as arrange | positioning two E-type core electromagnets back to back.

DESCRIPTION OF SYMBOLS 1 Upper vibration body 2 Base 3 1st leaf | plate spring (1st elastic member)
4 counter vibrator 5 second leaf spring (second elastic member)
6 Electromagnets 7 and 8 Movable iron core 10 Troughs 11 and 12 for alignment supply Trough members

Claims (4)

Exciting force generating function, a and two pairs of vibration generating mechanisms that have a restoring force generating function and the guiding function, the parts conveying member having a straight linear parts conveying path are attached to the upper vibration member 1 And a second component conveying unit having a counter vibrating body ,
Said one vibration generating mechanism of the two sets of the vibration generating mechanism, to generate the component carrying direction of the component along the component conveying path to the first component conveying unit, a vibration composed of the vertical component by conveys the parts of the component conveying path to the workpiece transport direction,
The other of the vibration generating mechanism of the two sets of the vibration generating mechanism, and parts of the transport direction component along the component conveying path to the second component conveying unit, Ri vertical component and Tona, the parts conveying In the vibration-type component conveying device in which the component of the direction generates the vibration having the opposite phase to the component of the component conveying direction of the vibration of the first component conveying unit ,
The vibration type component characterized in that the gravity center position of the first component conveyance unit and the gravity center position of the second component conveyance unit are arranged on the same plane constituted by the component conveyance direction and the vertical direction. Conveying device. Exciting force generating function, a and two pairs of vibration generating mechanisms that have a restoring force generating function and the guiding function, the parts conveying member having a straight linear parts conveying path are attached to the upper vibration member 1 And a second component conveying unit having a counter vibrating body ,
Said one vibration generating mechanism of the two sets of the vibration generating mechanism, to generate the component carrying direction of the component along the component conveying path to the first component conveying unit, a vibration composed of the vertical component by conveys the parts of the component conveying path to the workpiece transport direction,
The other of the vibration generating mechanism of the two sets of the vibration generating mechanism, and parts of the transport direction component along the component conveying path to the second component conveying unit, Ri vertical component and Tona, the parts conveying In the vibration-type component conveying device in which the component of the direction generates the vibration having the opposite phase to the component of the component conveying direction of the vibration of the first component conveying unit ,
Wherein the center of gravity of the first component conveying portion, and a center of gravity of the second component conveying unit, vibratory parts feeder is characterized in that arranged in the component conveying direction on a flat line of collinear. The one vibration generation mechanism has a restoring force generation function and a guide function by connecting the vibration mechanism that applies a vibration force to the upper vibration body and the upper vibration body and a base installed on the floor. A first elastic member ;
The other of the vibration generating mechanism has a vibrating mechanism for applying a vibrating force to the counter vibrator, and connecting the base and the counter vibrator, the second elastic having a restoring force generating function and guiding function With members ,
Previous SL second elastic member, provided in two or more locations with respect to a direction orthogonal the component carrying direction and the horizontal plane,
3. The vibratory component conveying apparatus according to claim 1, wherein the first elastic member is disposed between the second elastic members. 4. The one vibration generation mechanism has a restoring force generation function and a guide function by connecting an excitation mechanism that applies an excitation force to the counter vibration body, and the upper vibration body and a base installed on the floor. A first elastic member ;
The other of the vibration generating mechanism has a vibrating mechanism for applying a vibrating force to the counter vibrator, and connecting the base and the counter vibrator, the second elastic having a restoring force generating function and guiding function With members ,
The pre-Symbol first elastic member, provided in two or more locations with respect to a direction orthogonal the component carrying direction and the horizontal plane,
The vibratory component conveying apparatus according to claim 1, wherein the second elastic member is disposed between the first elastic members.

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