JP2005089088A - Vibration conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration conveyor with a simple structure, using a permanent magnet as a driving source, capable of simply carrying out adjustment of variation of vibration and adjustment of strong/weak state and being manufactured at a low cost. <P>SOLUTION: In the vibration conveyor, a vibration plate 6 is supported onto a base 1 through spring materials 3, 3'. The vibration conveyor is constituted by a driving side magnet 7 having a driving source for vibrating the vibration plate 6 made rotatably driven in which an axis of a driving magnetic wheel 7b having a magnetic pole helically magnetized on a peripheral surface of a shaft cylinder arranged along a vibration direction of the vibration plate; and a vibration side magnet 8 having an N pole and an S pole alternately arranged/fixed at a lower surface of the vibration plate 6 corresponding to pitch and inclination of the magnetic pole helically magnetized of the driving magnetic wheel. The vibration conveyor is vibrated utilizing loss-of-synchronism phenomenon of the magnets each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vibrating conveyor that is used to disperse piles of conveyed objects by vibration and individually transfer the conveyed objects, and in particular, using a permanent magnet as a driving source of vibration and utilizing a step-out phenomenon. The present invention relates to a vibration conveyor that generates vibration.

In the vibration conveyor, the vibrating member that carries the object to be conveyed is supported by a spring material, and is forcibly vibrated by the drive of a drive source that generates vibration, and the object to be conveyed such as parts is adjusted or transferred by the vibration. It's being used.
The general configuration of the vibration conveyor includes a base, a plurality of leaf springs provided between the base and the vibration member, and supporting the vibration member substantially horizontally, and a transported object fixed on the vibration member. And the like, and a drive source provided between the base and the vibration member.

  As the drive source, an electromagnetic vibrating body or piezoelectric element composed of an electromagnet fixed to a base and whose magnetic field intensity changes periodically by an AC power source and a suction plate fixed to a vibrating member is used. In addition, a piezoelectric vibrator using vibration generated by a periodic voltage change can be used.

  However, vibration conveyors using electromagnetic vibrators must change the frequency of the AC power supply to change the frequency, the output of the electromagnet changes with the frequency, the internal hysteresis of the electromagnet increases at higher frequencies, etc. There is a problem. On the other hand, a vibration conveyor using a piezoelectric vibrating body has a problem that it is expensive.

In order to solve the above problems, there has been proposed a technique in which a permanent magnet is used as a drive source and vibration is generated using a step-out phenomenon.
The configuration includes a rotor that rotates by rotation of a motor and a stator that is provided close to the rotor, and at least the rotor is a permanent magnet having a polarity, and the rotor and stator are rotated by the rotation of the rotor. The vibration is generated by the intermittent attraction force by the permanent magnet between them (see, for example, Patent Document 1).
However, since the thing of patent document 1 consists of a rotor and a stator, it can fundamentally combine only one pole of S pole and N pole. Therefore, it is difficult to change the vibration level.

JP-A-6-321334

  The problem to be solved by the present invention is that a permanent magnet is used as a drive source, and a vibration conveyor that can easily adjust vibration change and strength, and can be manufactured with a simple structure and at low cost. It is to provide.

In order to solve the above-described problems, the present invention provides a vibration conveyor having a diaphragm supported on a base via a spring material, a drive source for vibrating the diaphragm, and a magnetic pole spiraled around the shaft cylinder. The drive magnetic wheel magnetized in the shape of the drive magnetic wheel is arranged along the vibration direction of the vibration plate so that the drive side magnet can be driven and rotated, and the drive magnetic wheel is helically attached to the lower surface of the vibration plate. It is characterized by comprising a vibration-side magnet in which N poles and S poles are alternately arranged and fixed corresponding to the pitch and inclination of magnetized magnetic poles (claim 1).
The drive rotation of the drive side magnet (drive magnetic wheel) can be directly connected to the output shaft of the motor via a coupling or the like, or the output of the motor can be decelerated by a reduction mechanism and the output shaft of the reduction mechanism can be connected via a coupling or the like. Any of them may be connected and rotated.
As a spring material for supporting the diaphragm on the base, a conventionally known plate spring is suitable. In addition, the leaf spring may be attached with an inclination at a predetermined angle toward the conveying direction, or may be vertically installed. The inclination angle of the leaf spring is preferably about 80 degrees (a state where the plate spring is tilted about 10 degrees from the vertical in the transport direction). The number of spring members (plate springs) is generally two, but it is arbitrary to increase the number depending on the situation and load.
Moreover, the clearance gap between a drive side magnet and a vibration side magnet shall be 0.5-1.5 mm. In order to adjust the gap, the drive side magnet is supported so as to be movable and adjustable with respect to the vibration side magnet.

  The drive-side magnet may be a single rod-shaped body, but may be formed by fitting and fixing a short cylindrical magnet cylinder magnetized in a spiral shape to a shaft rod (Claim 2).

  Further, the diaphragm oscillated by the drive source is not only supported by a spring material, but also provided with guide means for limiting the vibration direction of the diaphragm across the base and the diaphragm, for example, an LM guide. (Claim 3).

According to the above configuration, when the drive side magnet (drive magnetic wheel) is rotated, the vibration side magnet tends to move in the axial direction of the drive side magnet following the spiral of the drive side magnet. However, since the diaphragm on which the vibration side magnet is fixed is elastically fixed by the spring material, it cannot move. Therefore, a so-called step-out phenomenon occurs in which the magnetic poles of the drive-side magnet and the vibration-side magnet slip. Simultaneously with this step-out phenomenon, a restoring force is exerted by a spring material (plate spring), and vibration is generated along with step-out.
And since the above-mentioned step-out phenomenon changes according to the rotation speed of the drive side magnet, the vibration also changes. Therefore, the change in vibration can be easily adjusted by changing the rotational speed of the motor.
Moreover, the intensity of vibration can be adjusted by increasing or decreasing the number of permanent magnets to be used.
Furthermore, since the magnetization of the drive side magnet (drive magnetic wheel) is spiral, the S pole and the N pole can be combined across multiple poles, and a larger vibration can be generated.

  According to the present invention, the vibration can be changed by adjusting the rotational speed of the motor that rotates the drive-side magnet, and the strength can be easily adjusted by increasing or decreasing the number of magnets. In addition, since the drive-side magnet is magnetized in a spiral shape, the S pole and the N pole can be combined across multiple poles, and higher frequency vibrations can be generated. Therefore, it is possible to provide a vibration conveyor that can carry not only small parts but also delicate conveyance.

And when it is set as the structure of Claim 2, the increase / decrease in the magnet which comprises a drive side magnet (drive magnetic wheel) can be performed easily, and the vibration conveyor excellent in the adjustment of a vibration and a maintenance can be provided.
Further, in the case of the configuration of claim 3, since the vibration direction of the diaphragm is limited by the guide means, the vibration in the transport direction can be stabilized.

A plate spring is erected and fixed on the upper surface of the base at a predetermined interval, and the diaphragm is mounted substantially horizontally over the upper end portions of the left and right plate springs. And on the base, the shaft core of the drive side magnet composed of the drive magnetic wheel is located on the lower side of the diaphragm so as to be rotatable in the vibration direction of the diaphragm, and the drive side magnet is mounted on the base The drive side magnet is connected to a motor with a speed reducer fixed to the base via a coupling so that the drive side magnet can freely rotate. On the other hand, a vibration side magnet in which N poles and S poles are alternately arranged corresponding to the pitch and inclination of the magnetic poles of the drive side magnet is fixed to the lower surface of the diaphragm with a predetermined gap from the drive side magnet. .
Further, the leaf spring is supported in a forward inclined state inclined at a predetermined angle (about 10 degrees) from the vertical toward the vibration direction of the diaphragm.

A vibration conveyor according to a first embodiment of the present invention will be described with reference to FIGS.
In the vibration conveyor A, leaf springs 3 and 3 'are erected on both sides in the longitudinal direction of a base 1 formed in a plane rectangular shape via brackets 2, and brackets are mounted on the upper portions of the leaf springs 3 and 3'. A support plate 4 for attaching the vibration side magnet via 2 'is installed and fixed substantially horizontally, and the vibration plate 6 is mounted and fixed integrally on the support plate 4 via a spacer 5, and further a base 1, a drive side magnet 7 for vibrating the vibration plate 6 is supported so as to be freely rotatable. On the lower surface of the support plate 4 integral with the vibration plate, the vibration side magnet 8 is spaced apart from the drive side magnet 7 by a predetermined distance. The arrangement is fixed.

  The plate springs 3 and 3 ′ for horizontally supporting the support plate 4 above the base 1 are fixed at a predetermined angle (vertical) by the bracket 2 fixed to the base 1 side and the bracket 2 ′ fixed to the support plate 4 side. For example, it is attached in an inclined state, thereby facilitating the generation of vibration in the vibration direction.

  The diaphragm 6 mounted and fixed on the support plate 4 is made of a stainless steel plate wider than the width of the support plate 4 and is formed in a trough shape by bending the front and rear side edges in the width direction substantially perpendicularly upward. The left-right direction is open, whereby the object to be conveyed is conveyed along the longitudinal direction of the diaphragm, and is transferred to another conveying means arranged continuously with the vibrating conveyor. The diaphragm 6 is not limited to the illustrated trough shape, and can be formed in various shapes according to the application.

The drive-side magnet 7 of the drive source that vibrates the diaphragm 6 is configured by fitting a number of short cylindrical drive magnetic wheels 7b on a long rod-shaped support shaft 7a.
The drive magnetic wheel 7b fitted to the support shaft 7a is formed in a circular short cylindrical shape using a permanent magnet such as a rare earth magnet, and an S pole zone and an N pole zone are spirally formed along the axial direction on the peripheral surface thereof. Is magnetized. The number of poles of the S and N pole bands to be magnetized is not limited. However, when multiple poles are magnetized, since the combination with the vibration side magnet 8 described later covers multiple poles, higher frequency vibration can be obtained. This is effective for delicate transport.

Further, as a method of fitting and fixing the drive magnetic wheel 7b having the above-described configuration to the outer periphery of the support shaft 7a in an integrally rotating manner, a wedge structure sleeve is provided between the outer periphery of the support shaft 7a and the inner peripheral surface of the drive magnetic wheel 7b. (See, for example, the fitting mechanism of Japanese Patent Laid-Open No. 2000-62925), or an O-ring is interposed between the outer periphery of the support shaft 7a and the inner peripheral surface of the drive magnetic wheel 7b. For example, a method of fixing the driving magnetic wheel 7b to the support shaft 7a with an adhesive may be used as appropriate.
The drive-side magnet 7 has a long rod shape with a large number of short cylindrical drive magnetic wheels 7a fitted thereto, but the drive magnetic wheel may be a single long long one having a predetermined length.

  The drive-side magnet 7 configured as described above is rotatably mounted over a bearing 10a built in a pair of bearing plates 10 and 10 ′ vertically installed on a base 1 with a bracket 9 and its support shaft. One end of 7a protrudes outward from the bearing plate 10 ', and the protruding end is connected to the output shaft of a motor 12 with a speed reducer fixed on the base 1 with a bracket 11 via a coupling 13. . Thereby, the drive side magnet 7 is driven and rotated by the motor 12 with a speed reducer.

Further, the bearing plates 10 and 10 'attached to the bracket 9 include a driving side magnet 7 supported by the bearing plates 10 and 10' and a vibration side magnet attached to the lower surface of the support plate 4 supported by the leaf springs 3 and 3 '. In order to adjust the gap with 8, it is attached with a structure that can be adjusted in the vertical direction.
Its structure is

The vibration-side magnet 8 that is fixed to the support plate 4 side so as to face the drive-side magnet 7 is formed in a flat plate shape using a permanent magnet such as a rare earth magnet, and the magnet constitutes the drive that constitutes the drive-side magnet 7. S poles and N poles are alternately arranged corresponding to the pitch and inclination of the magnetic poles magnetized in a spiral shape of the magnetic wheel 7 b, and are fixed to the lower surface of the support plate 4 using the holding frame 21.
The vibration-side magnet 8 configured as described above is attached in a non-contact state with the outer surface of the drive-side magnet 7, but the gap between the drive-side magnet 7 and the vibration-side magnet 8 (the surface of the vibration-side magnet and the drive-side magnet). The distance from the top of the magnet is set to 0.5 mm to 1.5 mm.

In order to adjust the gap between the drive side magnet 7 and the vibration side magnet 8 to an appropriate value, the bearing plates 10 and 10 'are supported with respect to the bracket 9 so as to be movable in the vertical direction as shown in FIG. Yes.
Specifically, a bolt mounting hole 18 for fastening the bearing plates 10 and 10 'to the bracket 9 with bolts and nuts 17 is a vertically long hole, and a screw is formed in the vertical direction from the lower end surface of the bearing plates 10 and 10'. A hole 19 is formed, and an adjusting screw rod 20 is screwed into the screw hole 19 with the lower end surface abutting the upper surface of the base 1.
As a result, by rotating the adjusting screw rod 20, the bearing plates 10, 10 ′ are moved and adjusted in the vertical direction, and the gap between the surface of the vibration side magnet 8 fixed to a predetermined position and the drive side magnet 7 is set to an optimum value. Can be adjusted. And it can maintain in an adjustment state by tightening the bolt and nut 17 after adjustment.

The vibration conveyor A configured as described above is configured such that when the motor 12 with a speed reducer is driven, the rotation is transmitted to the support shaft 7a through the coupling 13, and the drive magnetic wheel 7b is fitted and fixed to the support shaft 7a. The driven drive magnet 7 is rotated.
When the drive side magnet 7 rotates, the vibration side magnet 8 follows the spiral magnetic pole of the drive side magnet 7 as shown in FIGS. 7 (a), 7 (b) and 7 (c). It tries to move in the axial direction of 7a. However, since the support plate 4 to which the vibration side magnet 8 is fixed is elastically held by the leaf springs 3 and 3 ′, the leaf springs 3 and 3 ′ are not moved within the elastically deformable range of the leaf springs 3 and 3 ′. Although it moves following the spiral of the drive side magnet 7 while tilting, the magnetic pole of the drive side magnet 7 and the magnetic pole of the vibration side magnet 8 slip at the limit of the elastically deformable range of the leaf springs 3, 3 ′. This causes a so-called step-out phenomenon. At the same time as this step-out phenomenon, a resilient restoring force that tries to return to the original position of the leaf springs 3 and 3 ′ that are elastically deformed acts, and vibration is generated in the support plate 4. The vibration of the support plate 4 causes the vibration plate 6 connected to the support plate 4 to reciprocate in the arrow direction, and the object to be transported placed on the vibration plate 6 is transferred in the arrow direction.
The step-out phenomenon, which is the source of vibration generation, changes in accordance with the rotational speed of the drive-side magnet 7. Therefore, when changing the vibration, the rotational speed of the motor 12 with a speed reducer that rotates the drive-side magnet 7 is adjusted. To control. Further, the strength of vibration can be adjusted by increasing or decreasing the number of permanent magnets constituting the drive side magnet 7 and the vibration side magnet 8.
Since the arrangement of the permanent magnets is different from that of the prior art and is a linear system, the adjustment can be made only by a gap (gap) between the drive side magnet and the vibration side magnet, and the adjustment can be easily performed.

8 to 10 show a vibration conveyor according to a second embodiment of the present invention. The vibration direction of the vibration plate extends over the fixed side member of the base 1 and the movable side member of the support plate 4 provided with the vibration plate 6. Guide means B is provided for limiting the above. Since other configurations are the same as those of the first embodiment, description thereof is omitted.
The guide means B will be described below.
The guide means B limits the direction of vibration generated by the action of the vibration generating means having the same configuration as in the first embodiment, and the LM guide generally employed as this kind of guide means is a drive side magnet 7. It is arranged in parallel with the shaft core.
That is, the rail member 14 a constituting the LM guide 14 is fixed to the base 1 by the support member 15, and the slide member 14 b that slides with respect to the rail member 14 a has the mounting plate 16 on the support plate 4 provided with the diaphragm 6. Is fixed through.
As a result, the direction of vibration of the support plate 4 due to the step-out phenomenon caused by the drive side magnet 7 and the vibration side magnet 8 and the elastic action of the leaf springs 3 and 3 ′ is limited by the LM guide 14. Is guided and reciprocated only in the direction of the LM guide 14. That is, vibrations other than in the transport direction are suppressed, and vibrations are effectively used only in the transport direction. The guide means B is not limited to the LM guide 14 shown in the drawing, and may be any means as long as it slides linearly relative to each other.

1 is a partially cutaway front view showing a first embodiment of a vibrating conveyor according to the present invention. FIG. The enlarged right side view. The enlarged partial cutaway left side view. The expansion perspective view which shows a drive side magnet and a vibration side magnet. The expanded sectional view which shows the support structure of the bearing board which supports a drive side magnet. Operation | movement explanatory drawing which shows the relationship between rotation of a drive side magnet, and the vibration of a vibration side magnet. The front view which shows 2nd Example. FIG. The enlarged left side view.

Explanation of symbols

A ... Vibration conveyor 1 ... Base 3, 3 '... Spring material (leaf spring) 4 ... Support plate
6 ... Diaphragm 7 ... Driving side magnet 7b ... Driving magnetic wheel 8 ... Vibration side magnet 14 ... Guide means

Claims (3)

A vibration conveyor having a diaphragm supported on a base via a spring material, the drive source for vibrating the diaphragm, a drive magnetic wheel having a magnetic pole spirally magnetized on the peripheral surface of the shaft cylinder, Corresponding to the pitch and inclination of the drive side magnet, which is arranged along the vibration direction of the diaphragm and made freely rotatable, and the magnetic pole spirally magnetized on the lower surface of the diaphragm An oscillating conveyor comprising an oscillating side magnet in which N poles and S poles are alternately arranged and fixed. 2. The vibration conveyor according to claim 1, wherein the drive-side magnet is formed by fitting and fixing a short cylindrical magnet cylinder, which is magnetized in a spiral shape, on a shaft rod. 3. A vibrating conveyor according to claim 1, further comprising guide means for limiting a vibration direction of the diaphragm across the base and the diaphragm.

Images