JPH0355366B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for driving a multiple parts feeder in which a large number of independently driven bowl units are stacked and attached to a common support.

[Conventional technology]

In a multiple parts feeder, if the phases of the half-wave rectified alternating current flowing through the magnet coils of each bowl unit match, the magnets are excited at the same time, and the phases of attraction and release of the stacked bowls are adjusted. matches. Therefore, the vibration of each bowl unit is amplified, and as a result, vibration interference is likely to occur between the bowl units.

The present invention has been made for the purpose of eliminating vibrational interference between bowl units by alternately energizing the magnets of each bowl unit.

[Means for solving problems]

The driving method of the multiple parts feeder of the present invention is as follows:
The gist is that half-wave rectified alternating current is passed through the coils of the magnets of the bowl units that move up and down in phase, with a phase difference of 180 degrees, and the magnets are alternately excited.

〔Example〕

The present invention will be explained in detail based on the embodiments shown in FIGS. 1 to 6.

The proximal end of the support column 6 is inserted into a support cylinder 4 fixed to the base 2, and the support column 6 is fixed to the support cylinder 4 via screws 8.

A large number of bowl units B each driven independently are stacked and attached to a common support 6.

The bowl unit B includes a fixed base 10 made of a rectangular thick metal plate, and a movable base having four arm parts 12b radially provided on the outer periphery of a ring-shaped main body 12a at equal intervals along the circumferential direction. 12 are connected at four positions by leaf springs 14, and a hemispherical bowl 16 is attached to the movable table 12.

4 provided on the movable base 12 in the fixed base 10
A notch 10a is provided in a portion corresponding to the arm portion 12b of the book, and the inner surface of each notch 10a and the movable base 1
An inclined mounting surface 10 is provided on the side surface of each arm portion 12b of 2.
b and 12c are formed, respectively, and the upper and lower ends of the leaf spring 14 are fixed to the respective inclined mounting surfaces 10b and 12c. This leaf spring 14 is attached in an attitude tilted to the left.

Inclined attachment surface 1 on two opposing arm portions 12b of the four arm portions 12b of the movable base 12
A suction iron piece 20 is vertically provided on the side opposite to 2c via a bracket 18, and a magnet Ma (Mb) is attached to the fixed base 10 with a gap C necessary for excitation between the suction iron piece 20 and the suction iron piece 20. It is being
Each bowl unit B has a magnet.
Ma (Mb) is installed.

As shown in FIGS. 2 and 6, in this embodiment, each bowl unit B is equipped with a magnet Ma.
(Mb) are connected in parallel, but the present invention is not limited to this method of attaching magnets; for example, one magnet may be attached to each bowl unit B.

When the bowl unit B is attached to the support 6, the fixed base 10 will be in a floating state.
It is necessary to make the weight so that it will not be vibrated by the excitation of the magnet Ma (Mb), and if the weight is insufficient, a weight should be placed in an appropriate place to ensure the necessary weight.

In the center of the main body 12a of the fixed table 10 and the movable table 12, insertion holes 10c and 12 are provided, each having an inner diameter slightly larger than the outer diameter of collars 22a to 23c, which will be described later.
d are provided respectively.

A disc-shaped support plate 24 is provided between the fixed base 10 and the movable base 12 for attaching and supporting the bowl unit B to the support column 6, and a large number of short cylindrical vibration-proofing rubbers 26 are mounted on the support plate 24. A support plate 24 is attached to the back surface of the movable base 12 via the movable base 12. A large number of vibration isolating rubbers 26 are arranged at regular intervals on the same circumference.

Male threads 26a are provided on both upper and lower end surfaces of the vibration isolating rubber 26, and the male threads 26a allow the vibration isolating rubber 26 to
is attached to the movable base 12 and the support plate 24.
A fitting hole 24a having an inner diameter into which the support column 6 is fitted without a gap is provided in the center of the support plate 24.

When a large number of bowl units B having such a configuration are fitted into a common support 6 via the collars 22a to 22c, the collar presser 28 and the support 6 are connected via the eye bolt 30 at the upper end of the support 6, and then tightened. , each bowl unit B is attached to the support column 6.

The coils of magnets Ma and Mb are connected to the output sides of half-wave rectifiers X ₁ and X ₂ as shown in Fig. 6, and the output of AC power source W is connected to the input sides of half-wave rectifiers X ₁ and X ₂ . When the input signals are input with their phases shifted by 180 degrees, the magnet
The phase of the current flowing through each coil Ma and Mb is shifted by 180 degrees, and the attraction force of the magnet is maximum when the current value is maximum, so the magnets Ma and Mb of bowl unit B, which are located above and below each other, are alternately excited. . Also,
If a thyristor is used instead of the diodes that make up the half-wave rectifiers X ₁ and X ₂ , the magnet
Since it is possible to control the current flowing through Ma and Mb,
The amplitude of the bowl can be controlled.

For this reason, when one of the bowl units B moving up and down is attracted by the magnet Ma (Mb) and vibrates, the other bowl unit B is pulled back by the restoring force of the leaf spring 14 and vibrates in the opposite direction. The vibrations of the bowl unit B that rise and fall are in a relationship that cancels each other out.

Therefore, vibration interference between the bowl units B is eliminated, and vibrations are not transmitted to the base 2 via the support 6, so that the installation of the base 2 is stabilized.

Since the leaf spring 14 is mounted in an attitude tilted to the left, the vibration of the bowl unit B causes the parts housed in each bowl 16 to be transported in a counterclockwise direction.

In particular, in this embodiment, the vibration isolating rubber 26 prevents the vibration of the bowl unit B from being transmitted to the support column 6, and the magnet according to the present invention
In combination with alternate excitation of Ma and Mb, vibration interference between the bowl units B can be more reliably prevented.

〔Effect of the invention〕

The present invention alternately excites each magnet by passing a half-wave rectified alternating current with a phase difference of 180 degrees through the coils of each magnet attached to the bowl units that move up and down in the multiplex parts feeder. When one of the upper and lower bowl units is attracted by the magnet and vibrates, the other bowl unit is pulled back by the restoring force of the leaf spring and vibrates in the opposite direction.

Therefore, the vibrations of the bowl units that rise and fall one after another cancel each other out, and there is no interference between the bowl units due to vibrations.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of the multiple parts feeder, FIG. 2 is a plan view, FIG. 3 is a front sectional view, and FIG.
5 is an enlarged X-ray cross-sectional view, and FIG.
The figure shows the magnets of bowl unit B that are moved up and down.
FIG. 7 shows _{the connection state of Ma, Mb, half-wave rectifiers X 1 ,} FIG. 3 is a diagram for explaining the phase relationship between the flowing current and the attractive force of the magnet. [Explanation of symbols of main parts] B: Bowl unit,
Ma, Mb: magnet, X ₁ , X ₂ : half-wave rectifier,
W: AC power supply, 6: Strut.

Claims (1)

[Claims] 1. In a multiple parts feeder in which a large number of independently driven bowl units are stacked and mounted on a common support, the coils of each magnet attached to the bowl units located above and below each other are
A method for driving a multiplex parts feeder characterized by alternately exciting by flowing half-wave rectified alternating current with a phase difference of 180°.