JPH0242657Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibrating body that is a driving part of a parts feeder (bowl feeder, linear feeder) that performs horizontal nonlinear vibration.

A bowl feeder that has been widely used in the past has a bowl with a spiral internal feed path supported by several sets of diagonal leaf springs, and the leaf springs and solenoids cause the bowl to vibrate in simple harmonic motion in the diagonal direction. Therefore, the bowl not only rotates and vibrates, but also moves up and down, which creates noise and worsens the working environment.The bowl also tends to peel off the plating and cause damage, making it unsuitable for many precision parts and other workpieces. Moreover, because the natural frequency varies depending on the amount of parts in the bowl, it is likely that the amplitude will fluctuate, making it difficult to obtain a constant vibration. They had various problems such as being difficult to move. In addition, in the case of a straight feeder, the trough moves up and down, making noise, and the workpiece moves up and down, making it difficult to control.

In order to solve the above problems, the inventor of the present invention conducted various studies and developed a bowl feeder that uses a motor as a drive source and generates horizontal nonlinear vibration. (Japanese Patent Application No. 57-110461, Patent Application No. 56-073224) This is because the conventional vibrating bowl feeder uses a combination of a solenoid and a leaf spring to support the bowl and generates simple vibration (a combination of rotational vibration and vertical vibration) in the diagonal direction. In contrast, the bowl, which is rotatably supported around a central axis, is vibrated in horizontal rotation with a large difference in reciprocating acceleration using a nonlinear cam, and the parts inside the bowl are moved using frictional force and inertial force. It was about the bowl feeder.

The principle is as follows.

In other words, when the bowl rotates and vibrates in the horizontal direction, the frictional force that acts on the parts inside the bowl between the inertia force corresponding to the acceleration and the feeding path surface of the bowl (F=mμg: m is the mass of the part, μ is the frictional force between the feeding path surface and the bowl) Static friction coefficient between parts, g
is the acceleration of gravity). Therefore, the inertial force (f=
The shape of the cam and the motor are designed so that mα: α is the acceleration) is smaller than the frictional force F, and the inertia force (f'=mα') when rotating in the opposite direction produces an acceleration that is larger than the frictional force F. If the rotation is selected, suitable supply will be achieved. The component feeding speed at this time is a function of the frequency and amplitude, similar to the conventional method using a leaf spring and solenoid, but in this case, the frequency is arbitrarily determined by the rotational speed of the motor, and like a solenoid, the It is not limited by frequency. In addition, the amplitude is determined by the difference between the major and minor axes of the cam, but unlike conventional products, when the amplitude is increased, the parts do not collide with the feeding path surface and move unstable, so the amplitude is quite large. can be taken.

Therefore, by selecting an appropriate friction coefficient and amplitude, it is possible to quickly and stably deliver parts without increasing the vibration frequency.
It is possible to align and sort all kinds of parts, from thin and small precision parts such as crystal oscillators and IC boards to large parts such as gears and crankshafts, silently and without damaging them.

Note that the above principle can be used not only for bowls but also for linear feeders without any problem, and its uses are extremely wide.

However, since the motor of this motor-driven bowl feeder or linear feeder is fixed to the side of the bowl or trough, it can be used in combination with robots or various parts shooters (such as automatic assembly equipment), or when used in a factory. When installing into a conventional line in a limited space, the motor often gets in the way. There are also problems in terms of effective use of space.

The present invention has been developed to overcome these drawbacks, and will be described in detail below based on embodiments shown in the drawings.

Figure 1 shows an example of the present invention, in which a nonlinear vibration feeder vibrating body 1 (hereinafter referred to as vibrating body 1)
is composed of a drive section 2 and a vibration propagation device 3.

The drive unit 2 includes a motor 4, as shown in FIG.
Cam 5 (the above is indicated by chain lines) and slider section 6
It consists of etc. Of these, the slider section 6 is
Slider 6 that actually vibrates the parts feeder
1, a roller 62 attached to one end of the slider 61 and pressed against the cam 5, and a slider receiver 63 that supports the slider 61, and these are housed in a case 7. The other end of the slider 61 is connected to one end (joint) 3 of a bush pull wire as the vibration propagation device 3.
The fixed part of the wire is fixed to the frame 8. Further, reference numeral 9 is a mounting portion for fixing the drive portion 2.

Thus, the rotation of the motor 4 causes the roller 62 to roll via the cam 5, and the slider 61 vibrates back and forth. Incidentally, since the cam 5 is formed in an eccentric elliptical shape or the like so as to generate a difference in acceleration in reciprocation, the slider 61 performs nonlinear vibration such that the forward movement is slow and the return movement is fast. Then, the vibration with a difference in acceleration during this reciprocation, that is, the nonlinear vibration, is transmitted to the outside, for example, a component conveying section such as a trough or a bowl, via the vibration propagation device 3.

This vibration propagation device 3 connects the drive section 2 and the component transport section, which are separated and placed at an arbitrary remote location, and is preferably flexible and capable of reliably transmitting the vibrations of the drive section 2. In the example, a push-pull wire is used, but other materials such as a hydraulic pipe can also be used. When using a hydraulic pipe, various methods are used, such as connecting a slider 61 to the piston of a hydraulic cylinder (not shown), or using the piston 65 of the hydraulic cylinder 64 itself as a slider and attaching a roller 62 to its end, as shown in Fig. 2b. Structures can be considered.

Next, in FIG. 3, this vibrating body 1 is
0 (without a driving part) trough 11 is shown.

As is clear from the figure, the other end of the vibration propagation device (push-pull wire) 3 is connected to the trough 11 through a connecting member 12 whose movable portion is fixed to the trough, and whose fixed portion is connected to the mounting member. It is fixed at 13. On the other hand, both ends of the trough 11 are supported horizontally on a support member 14 which is excellent in wear resistance and has a small coefficient of friction. Furthermore, these mounting members 13
The supporting member 14 is fixed on the pedestal 15, and the connecting member 12 is floating from the pedestal 15.

In addition, the movable part of the vibration propagation device 3 is connected to the connecting member 12.
The roller 62 of the slider is pressed against the cam 5 at all times. However, the position of this spring 16 is not limited to the illustrated position, and may be provided, for example, in the drive portion 2 as shown in FIG.

When the motor 4 of the vibrating body 1 is operated, the cam 5 rotates, and the roller 62 in contact with the cam 5 rotates.
and causes the slider 61 to vibrate nonlinearly. This vibration is transmitted as it is inside the vibration propagation device 3, and the trough 1
1 is made to vibrate horizontally nonlinearly very smoothly.

Note that the vibrating body 1 of the present invention is a bowl feeder 1.
7 (without a drive source) can also be used as a drive source. FIG. 4 shows one example of this, in which the other end of the vibration propagation device 3 is connected to the side surface of a bowl 19 horizontally rotatably supported on a shaft 18, and nonlinear vibration is applied to the bowl 19 in the tangential direction. It is. In this case as well, the positions of the bowl and the drive source can be changed freely, making it suitable for installing the feeder in a narrow space.

When connecting to a bowl feeder, vibration from two directions as shown in FIG. 5 reduces the load on the rotating shaft and improves efficiency (three or more directions are also possible). In this case, each motor 4 may be synchronized using two vibrating bodies 1, or the ends of two vibration propagating devices 3 may be connected to the slider 61.

Of course, the vibrating body 1 of the present invention can also be used as a drive source for a trough that vibrates while tilting upward or downward, or a bowl that rotates tilting.

As explained above in detail, the nonlinear vibration feeder vibrator of the present invention has a motor as a driving source, a cam driven by the motor that has a large difference in reciprocating acceleration, and a nonlinear vibration generated by the rotation of the motor. It is composed of a driving section including a moving slider, and a flexible vibration propagation device connected to the slider. Therefore, the driving section and the component transport section can be placed at arbitrary separate positions, making it easy to incorporate into the assembly line and making efficient use of space. Moreover, since there is no need to incorporate a drive source into each individual bowl feeder or linear feeder, the equipment becomes cheaper, and only the parts conveying section needs to be replaced depending on the type and shape of the workpiece, resulting in extremely low capital investment. It is valid.

[Brief explanation of drawings]

Figure 1 is a perspective view showing one example of the present invention, Figure 2 a
1 is a perspective view showing the drive section shown in FIG. 1, FIG. 2b is a schematic plan view of another embodiment of the drive section, and FIG.
The figure is a side view showing the state in which the vibrating body of Fig. 1 is attached to a linear feeder, Fig. 4 is a side view showing the state in which it is attached to a bowl feeder, and Fig. 5 is a schematic plan view showing a modification of Fig. 4. be. DESCRIPTION OF SYMBOLS 1... Nonlinear vibration feeder vibrating body, 2... Drive unit, 3... Vibration propagation device, 4... Motor, 5... Cam, 6... Slider part, 61... Cylinder,
62...Roller, 63...Slider, 64...
...Hydraulic cylinder, 65...Piston, 10...
... Straight feeder, 11 ... Trough, 12 ... Connection member, 13 ... Mounting member, 14 ... Support member, 15 ... Pedestal, 16 ... Spring, 17 ... Bowl feeder, 18 ... Shaft, 19 ... bowl.

Claims (1)

[Claims for Utility Model Registration] 1. A motor as a driving source, a nonlinear cam driven by the motor that has a large difference in reciprocating acceleration, and a slider that is in contact with the nonlinear cam and vibrates nonlinearly back and forth as the motor rotates. 1. A nonlinear vibration feeder vibrator comprising: a drive unit including a drive unit; and a flexible vibration propagation device connected to the slider. 2. The nonlinear vibrating feeder vibrating body according to claim 1, wherein the slider is constantly pressed against the nonlinear cam by a spring. 3 Utility model registration claim 1 that uses a push-pull wire as a vibration propagation device
The nonlinear vibrating feeder vibrating body according to item 1 or 2. 4. The nonlinear vibration feeder vibrating body according to claim 1 or 2, which uses a hydraulic pipe as the vibration propagation device. 5. The nonlinear vibrating feeder vibrating body according to claim 4, which uses a piston of a hydraulic cylinder as a slider.