JP2002321811A - Base excitation vibrating conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the constitution of a line excitation generating device constituting a base excitation vibrating conveyor. SOLUTION: Line driving force F generated by mounting a rotary vibrator RV on side plate parts of base plate 3a and 3b constituting the base excitation vibrating conveyor A1 and operating the rotary vibrator RV is passed through a center of gravity G1 of a trough 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line excitation generator mounted on a base, which vibrates the base and transmits its linear driving force to a trough via a plurality of driving leaf springs. The present invention relates to a base-excited vibration conveyor configured to vibrate and convey the above components.

[0002]

2. Description of the Related Art As a conventional base-excited vibration conveyor,
There is one disclosed in JP-A-10-258924. In this publication, the mounting position of the line excitation generator with respect to the base is arranged so that the linear driving force passes through the center of gravity of the trough, thereby minimizing the vibration stroke of the base, that is, the weight of the trough and the base. Make the ratio as small as possible,
There is disclosed a technique in which components on the trough can be conveyed by vibration. The base-excited vibration conveyor A 'will be described. As shown in FIG. 11, the base-excited vibration conveyor A ′ is composed of a trough 51 and a base 53 that supports the trough 51 via a plurality of driving leaf springs 52. The plurality of driving leaf springs 52 include:
It is mounted in a state inclined at a mounting angle θ with respect to the vertical plane. That is, with respect to the transport direction P of a part (not shown) vibrated and conveyed by the base-excited vibrating conveyor A ′,
It is mounted in a state of being inclined backward by the mounting angle θ. A line excitation generator (to be described later) including the drive motor 54 and the like.
Are arranged such that the linear driving force F ′ passes through the center of gravity G ₁ ′ of the trough 51 and acts on a plane orthogonal to the longitudinal direction of the plurality of driving leaf springs 52.

When the driving motor 54 is operated in this state, a linear driving force F 'is generated. This line driving force F 'is the center of gravity G ₁ trough 51' for passing, the trough 51 is reciprocally linearly oscillated back and forth direction. Here, "linear vibration"
This refers to vibration in which the reciprocating vibration locus of the trough 51 is linear. At this time, the vibration direction a of the trough 51 depends on the linear driving force F ′.
Along the direction of action. However, 'the center of gravity G ₂ of the base 53' the base excitation frequency conveyor A is not consists in the action line of the line drive force F '. Therefore, the trough 51
(The vibration reaction force when the plurality of driving leaf springs 52 are flexed and vibrated) acts on the base 53, and the base 53 is vibrated. The vibration force of the base 53 is absorbed by the vibration-proof spring 55 and is prevented from reaching the floor surface U. In FIG. 9, the vibration direction a when the trough 51 is vibrated forward is indicated by a solid line, and the vibration direction a when the trough 51 is vibrated rearward is indicated by a broken line.

When the center of gravity G ₂ ′ of the base 53 is on the line of action of the line driving force F ′, the line driving force F ′ generated from the line excitation generator causes the trough 51 to vibrate linearly. It works only to make it work. At this time, the trough 51 performs ideal reciprocating linear vibration, and the vibration stroke (amplitude) of the base 53 that vibrates by receiving the vibration reaction force T ′ becomes extremely small. For this purpose, a weight (not shown) is often attached to the rear portion of the base 53.

[0005] Next, a description will be given of a line excitation generator attached to the base excitation vibration conveyor A '. A drive motor 54 is attached to a side plate of the base 53.
The drive motor 54 is arranged so that the drive leaf spring 5
2 is mounted in a state inclined by the mounting angle θ, in other words, with its axis centered along the longitudinal direction of the driving leaf spring 52 in a stationary state. Then, on the side plate portion of the base 53, beside the drive motor 54, the drive motor 54
The rotating shaft 56 arranged in parallel with the axis of the two bearings 5
7 is rotatably supported. The drive motor 5
4, a motor pulley 58 is mounted on the motor shaft 54a, and a pulley 5 is mounted on one end of the rotary shaft 56.
9 is mounted. A toothed belt 61 is mounted on the pulleys 58 and 59. In addition, the rotating shaft 5
6, two weights 6 are provided at regular intervals in the axial direction.
2 is mounted eccentrically with respect to the axis of the drive motor 54.

When the drive motor 54 is operated, the rotating shaft 56 is rotated. At the same time, two weights 6
2 are rotated, and their centrifugal force generates a linear driving force F ′. This line driving force F ′ is equal to the center of gravity G ₁ ′ of the trough 51.
The trough 51 is reciprocated linearly and vibrated, and the components in the trough 51 are vibrated and conveyed.

However, the base-excited vibration conveyor A '
Since the line excitation generator requires a mechanism for rotating the two weights 62 in addition to the drive motor 54, the configuration becomes complicated and the number of parts increases.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to simplify the configuration of a line excitation generator constituting a base excitation vibration conveyor.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a base, a trough connected to the base via a plurality of driving leaf springs, and a linear driving force which is applied to the center of gravity of the trough. A line excitation generator attached to the base so that the plurality of driving leaf springs bend and vibrate by the linear driving force of the line excitation generator to convey parts on the trough. A base-excited vibration conveyor, wherein the line-excitation generator is constituted by a rotary vibrator.

In the base-excited vibration conveyor according to the first aspect of the present invention, the linear-excitation generator for bending and vibrating a plurality of driving leaf springs is a rotary vibrator attached to the base. When the rotary vibrator is operated, a weight mounted eccentrically inside the rotary vibrator is rotated. Then, vibration is generated by the centrifugal force. This vibration force (linear driving force) passes through the center of gravity of the trough. For this reason, the trough is linearly vibrated along the direction in which the linear driving force acts, and the components on the trough are conveyed by vibration. In the case of the present invention, since it is only necessary to attach the rotary vibrator to the base as the line excitation generator,
Its construction is very simple.

According to a second aspect of the present invention, based on the premise of the first aspect, the trough is provided with a tension spring for increasing the amplitude of each of the driving leaf springs. Are mounted along a direction orthogonal to the longitudinal direction of the. In this case, since the tension springs expand and contract as the plurality of driving leaf springs flex and vibrate, the amplitude of each driving leaf spring can be increased. As a result, even if the component is heavy, it can be vibrated and conveyed.

[0012] The invention described in claim 3 is the invention according to claim 1 or 2.
The rotary vibrator is configured to generate vibration by rotating a rotating shaft mounted with an eccentric weight, and the number of rotations of the rotating shaft is adjustable. And For this reason, the magnitude of the linear driving force can be adjusted by adjusting the rotation speed of the rotation shaft. That is, adjustment for matching the frequency of the linear excitation generator with the natural frequency of the entire base excitation vibration conveyor can be easily performed. As a result, the component can be vibrated and conveyed without increasing the frequency of the line excitation generator so much.

According to a fourth aspect of the present invention, based on the first aspect of the present invention, the base has a configuration in which two base plates are erected at a predetermined interval. The rear end portions thereof are bent toward the inside facing each other, and the line excitation generator is attached to the bent portions. For this reason,
The center of gravity of the base is located more rearward, and can be closer to the line of action of the linear driving force. Further, since the line excitation generator can be mounted inside the base, the width of the base excitation vibration conveyor can be reduced.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to embodiments. First, a description will be given based excitation frequency conveyor A ₁ of the first embodiment. Figure 1 is an overall perspective view of the base excitation frequency conveyor A ₁ of the first embodiment of the present invention,
2 is a front view, FIG. 3 is a plan view, and FIG. 4 is a right side view. As shown in FIGS. 1 to 4,
Base excitation frequency conveyor A ₁ of the first embodiment of the present invention,
A trough 1 for vibrating and transporting the parts and a plurality of troughs 1 (in the case of the present embodiment,
A base 3 for supporting the driving leaf springs 2 via the driving springs 16, and a plurality of bases 3 (in this embodiment, 4
It comprises a support 5 and the like for supporting the floor U via the vibration isolating spring 4 of the present invention.

First, the base 3 will be described. FIG.
As shown in FIG. 4, the base 3 is formed by arranging two base plates 3a and 3b, which have a substantially rectangular shape in a front view, in a state where they face each other. The upper ends of the base plates 3a, 3b are bent inward for reinforcement (see FIG. 4). Linear excitation generator constituting the base excitation frequency conveyor A ₁ of the first embodiment is a rotary vibrator RV, wherein each base plate 3a, a side plate portion of 3b, is attached by one group respectively. Thus, respective members constituting the base excitation frequency conveyor A ₁ of the first embodiment, each of the base plate 3a, a side plate portion of 3b, are mounted respectively. Since the construction is exactly the same for both base plates 3a and 3b, only the members attached to the front base plate 3a will be described below.

The trough 1 is connected to a base 3 by a plurality of driving leaf springs 2. That is, the side plate portion 1a of the trough 1 is provided with a rectangular plate-like leaf spring mounting member 6 projecting at a predetermined mounting angle θ with respect to a vertical plane. The four leaf spring mounting members 6 are mounted at predetermined intervals in the longitudinal direction of the trough 1. Then, on both side surfaces of each leaf spring mounting member 6,
An upper end portion of each of the driving leaf springs 2 is fixed. Each drive leaf spring 2 is an elongated leaf spring and has a predetermined spring constant. The lower end of each driving leaf spring 2 is attached to each leaf spring mounting member 6 attached to the side plate 1a of the trough 1.
Corresponding to the above, it is fixed to each leaf spring mounting member 7 projecting from the side plate portion of the base plate 3a. That is, each of the leaf spring mounting members 7 is also mounted four at a time at a predetermined mounting angle θ with respect to the vertical plane. As a result, two leaf springs 2 are provided for each leaf spring mounting member 6, 7.
They are mounted as a set and at a predetermined mounting angle θ with respect to the vertical plane while being inclined backward with respect to the component transport direction P (see FIG. 2). Thus, the trough 1
And the base 3 are connected by eight driving leaf springs 2.

Next, the rotary vibrator RV will be described. FIG. 5 is a front view of the rotary vibrator RV partially cut away, and FIG. 6 is a side sectional view of the same. This rotary vibrator RV is a rotary shaft 1 of a three-phase induction motor.
The eccentric weights 12a and 12b are attached to both ends of the eccentric weight 1. When the rotary shaft 11 is rotated, the centrifugal force of each eccentric weight 12a and 12b is taken out as a vibration force (linear driving force F). It is. As shown in FIGS. 5 and 6, two eccentric weights 12 are provided on both ends of the rotating shaft 11 rotatably supported by two bearings 14 attached to the frame 13 of the rotary vibrator RV.
a, 12b are mounted. That is, the first eccentric weights 12 a having a substantially sector shape are mounted on both ends of the rotating shaft 11 and fixed by the fixing bolts 15. Subsequently, second eccentric weights 12 b having the same shape are mounted on both ends of the rotating shaft 11 and fixed by fixing bolts 15.
The second eccentric weight 12b is for adjusting the magnitude of the vibration force, and is fixed to the first eccentric weight 12a in a state of being shifted by a predetermined angle in the circumferential direction. When the rotating shaft 11 is rotated in a predetermined direction, a vibration force is generated by the centrifugal force of each of the eccentric weights 12a and 12b. The magnitude of this vibration force depends on the second eccentric weight 1
It can be adjusted by moving the mounting position of 2b in the circumferential direction. In FIG. 5, reference numeral 16 denotes a cover for covering the eccentric weights 12a and 12b, which is detachably attached to the frame 13. Similarly, 17
Is an attachment bolt for fixing the cover 16 to the frame 13, 18 is an O-ring, and 19 is a stator.

The rotary vibrator RV is mounted on the front side plate of the base plate 3a with the same mounting angle θ as the mounting angle θ of each driving leaf spring 2. Furthermore,
The eccentric weights 12a, the linear driving force F generated by rotating the 12b, so that through the center of gravity G ₁ of the trough 1, is attached to the rear of the base plate 3a (see FIG. 7).

A substantially U-shaped bracket 21 is attached to the side plate of the base plate 3a at the front and rear ends in the longitudinal direction so as to protrude toward the near side. Below these brackets 21, the columns 5 are installed, respectively.
An anti-vibration spring 4 is mounted between the two. Each anti-vibration spring 4 is a compression spring, which absorbs the vibration force of the base 3 vibrating in response to the vibration reaction force T of the trough 1 and prevents the vibration force from adversely affecting the floor surface U. .

The base-excited vibration conveyor A _{1 of} the first embodiment.
The operation of will be described. As shown in FIG. 7, when the rotary vibrator RV is operated to rotate the rotating shaft 11 in a predetermined direction, the eccentric weights 12a and 12b mounted on both ends of the rotating shaft 11 are rotated. Then, a vibration force (linear driving force F) is generated by the centrifugal force of each of the eccentric weights 12a and 12b, and each of the driving leaf springs 2 is flexed and vibrated. Moreover, the rotary vibrator RV
, The line drive force F is attached to a position passing through the center of gravity G ₁ of the trough 1. For this reason, the trough 1 has the vibration direction a
Reciprocally oscillates almost linearly. At this time, the free end of the actuating leaf spring 2 (the upper end), along said vibration direction a, acts vibration forces T ₁ of the for vibrating the deflection of each drive plate spring 2, as well group At the end (lower end), the vibration reaction forces T ₂ acts.

Here, the center of gravity of the base 3 is defined as G ₂ . When the center of gravity G _{2 of the} base 3 is on the line of action of the linear driving force F, the linear driving force F of the rotary vibrator RV
Operate only to cause the trough 1 to vibrate linearly. In this case, the trough 1 performs an ideal linear vibration, the vibration stroke of the base 3 which vibrates by receiving the vibration reaction forces T ₂ are very small.

As described above, the line excitation generator constituting the base excitation vibration conveyor A1 of the _first embodiment is the rotary vibrator RV. The rotary vibrator RV need only be attached to the side plate of the base plate 3a as it is, and, like the conventional base excitation vibration conveyor A ', besides the drive motor 54, a pulley 58,
Since no parts such as 59 are required, the configuration is extremely simple.

Next, referring to FIG. 8 to FIG.
For the base excitation frequency conveyer A ₂ of the second embodiment will be described. Base 22 constituting the base excitation frequency conveyer A ₂ in this embodiment, two base plate 22a constituting the base 22, the rear end portion of the 22b, is bent inward while holding the mounting angle θ . A rotary vibrator RV is attached to the bent portion 23 at an attachment angle θ. Said rotary vibrator RV, by attached to the bent portion 23, the center of gravity G ₂ of the base 22,
It can be arranged more rearward. That is, the base 22
Of the center of gravity G _2, it can be provided at a position as close to a more linear driving force line of action F. As a result, the vibration stroke of the base 3 that vibrates in response to the vibration reaction force T ₂ of the trough 1 (see FIG. 7) can be further reduced. In addition, each rotary vibrator RV is connected to two base plates 22a, 22a.
it is possible to arrange in the space between the b, it is possible to narrow the width of the base excitation frequency conveyer A _2, the conveyor A ₂ can also be placed in a narrow space.

Further, two tension springs 24 for increasing the amplitude of each driving leaf spring 2 are attached to the base-excited vibration conveyor A ₂ of this embodiment. That is, a spring support bar 25 is attached to the rear end of the base 22 along the width direction of the base 22 on the inner wall surfaces of two base plates 22a and 22b constituting the base 22. The lower end of each tension spring 24 is attached to the spring support bar 25, and the upper end of each tension spring 24 is attached to the bottom surface of the rear part of the trough 1. The mounting direction of each tension spring 24 is substantially orthogonal to the longitudinal direction of each driving leaf spring 2. For this reason, each tension spring 24 always pulls the trough 1 backward. When the trough 1 is moved backward, the elastic force of each tension spring 24 is added to the bending vibration of each driving leaf spring 2, and the amplitude of each driving leaf spring 2 becomes larger. As described above, since each tension spring 24 is attached,
The amplitude of each of the driving leaf springs 2 can be increased, and even a heavy component can be vibrated and conveyed.

The rotational speed of the rotary shaft 11 constituting the rotary vibrator RV of each of the above embodiments may be adjustable using variable speed means such as an inverter. This makes it possible to electrically adjust the frequency of the linear driving force F generated by the rotary vibrator RV. That is, it is easy to adjust the frequency of the linear driving force F of the rotary vibrator RV to match the natural frequency of the entire base excitation vibration conveyor. For this reason, an optimal linear driving force can be easily applied according to the component to be conveyed by vibration. That is, adjustment for matching the frequency of the rotary vibrator RV with the natural frequency of the entire base excitation vibration conveyors A ₁ and A ₂ can be easily performed. As a result, the components can be vibrated and conveyed without increasing the frequency of the rotary vibrator RV.

Further, in each of the embodiments described in this specification, the springs attached to increase the amplitude of each driving leaf spring 2 are the tension springs 24, but may be compression springs. . In this case, when the trough 1 is moved forward, the elastic force of the compression spring is added.

[0027]

The base-excited vibration conveyor according to the present invention is characterized in that a plurality of drive leaf springs connecting the trough and the base are flexed and vibrated by a line excitation generator attached to the base, whereby the trough is vibrated. This is a base-excited vibration conveyor that conveys the above components, and the line-excitation generator is constituted by a rotary vibrator. For this reason,
The configuration of the line excitation generator becomes extremely simple.

[Brief description of the drawings]

1 is an overall perspective view of the base excitation frequency conveyor A ₁ of the first embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view of the same.

FIG. 4 is a right side view of the same.

FIG. 5 is a front view of the rotary vibrator RV with a part cut away.

FIG. 6 is a side sectional view of the same.

7 is a schematic diagram showing an operation of the base excitation frequency conveyer A _1.

FIG. 8 is an overall perspective view of a base-excited vibration conveyor A2 of a _second embodiment.

FIG. 9 is a front view of the same.

FIG. 10 is a right side view of the same.

FIG. 11 is a schematic view showing the operation of a conventional base excitation vibration conveyor A ′.

[Explanation of symbols]

A ₁ , A ₂ : Base-excited vibration conveyor F: Linear drive force G ₁ : Center of gravity RV: Rotary vibrator (Line-excited generator) 1: Trough 2: Drive leaf spring 3, 22: Base 3a, 3b, 22a, 22b : Base plate 11: Rotary shaft 12a, 12b: Eccentric weight (weight) 23: Bent portion 24: Tension spring

Claims (4)

[Claims] 1. A base, a trough connected to the base via a plurality of driving leaf springs, and a line excitation generator attached to the base such that a linear driving force passes through the center of gravity of the trough. A base excitation vibration conveyor for bending and vibrating the plurality of driving leaf springs by a linear driving force of the line excitation generation device to convey components on a trough, wherein the line excitation generation device A base-excited vibration conveyor comprising a rotary vibrator. 2. A tension spring for increasing the amplitude of each of the driving leaf springs is attached to the trough along a direction orthogonal to the longitudinal direction of each of the driving leaf springs. The base-excited vibration conveyor according to claim 1. 3. The rotary vibrator according to claim 1, wherein the rotary vibrator is configured to generate vibration by rotating a rotating shaft mounted with an eccentric weight, and a rotation speed of the rotating shaft is adjustable. Item 3. The base-excited vibration conveyor according to item 1 or 2. 4. The base has a structure in which two base plates are erected at a predetermined interval, and rear ends of the base plates are bent inward to face each other. 4. The base-excited vibration conveyor according to claim 1, wherein a line excitation generator is attached to the bent portion.