JPH0243118A - Electromagnetic oscillation feeder - Google Patents

Abstract

PURPOSE:To make close to zero (0) the reaction force of an electromagnetic oscillation feeder to the installation ground by fixing a drive electromagnet to one of a trough and an opposed mass arranged below the trough, while fixing a contact electrode element to the other, and arranging slant plate springs between the trough and a base and between the opposed mass and the base. CONSTITUTION:An electromagnet 22 is monolithically mounted on a balance weight 19 extending laterally in a line below a trough part 2. This weight 19 is coupled to a basic block 17 through a pair of right and left flat springs. In an L-shaped movable core 14, its horizontal part 14c is arranged in opposition to the magnetic pole face of the magnet 22 and is mounted on a flat spring mounting blocks 12a, 12b of the trough part 2 through arm parts 14a, 14b formed at a vertical part 14d. With this arrangement, both the trough and the opposed mass oscillated, respectively, with a mutual phase difference of 180 degrees so that thereaction force to the base can be made zero (0) substantially. It is thus possible to make the reaction force to the installation ground zero (0).

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electromagnetic vibration feeder.

[Prior art and its problems]

FIG. 5 shows a conventional example of an electromagnetic vibration feeder, in which a tiger 76υ is connected to a driving side way C37J and a pair of front and rear inclined plates by a spring joint. The drive side weight r33 is supported on the ground by anti-vibration springs (to) (b). drive side way) C321 has a support member (
An electromagnet Cη having a coil (to) wound thereon is attached via the armature Cη, and an armature Cη is fixed to the trough 3υ side with a gap between the electromagnet Cη and the electromagnet Cη. As is well known, when an alternating current is applied to the coil, an alternating attractive force is generated between the electromagnet Cη and the armature, which causes the trough Gυ to vibrate in the direction perpendicular to the longitudinal direction of the leaf spring. I do.

However, even though vibration isolation is carried out on the ground by the trough (the reaction force is transmitted through the vibration isolation plate and the vibration isolation spring tension), the drive side The reaction force is transmitted to the ground according to the swing width of the weight r33. Now, if the mass of the trough example is m, the mass of the drive side weight field is m, the width of the trough (III) is xl, and the width of the drive side weight field is X, then Tnt / mt = X!
/xt holds true. That is, X! = m
, 7m2 X xl. Therefore, the reaction force transmitted to the ground is kt, assuming that the spring constant of the anti-vibration spring (b) is
xxl becomes. As can be seen from this equation, in order to reduce the reaction force, the spring constant of the anti-vibration spring (b) should be made smaller, and the mass should be made larger. This means that the support provided by vibration isolation is extremely unstable, and the entire vibrating feeder becomes unstable. This makes the state of the parts or materials transported within the trough 3υ unstable. Also, drive side way)・
It may be possible to increase the mass of 3z, but this would increase the overall mass of the vibrating feeder and make handling the pick inconvenient. Moreover, the increase in material cost also increases the device cost, and there is a limit to increasing the mass of the drive side weight C33.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic vibration feeder that can reduce the reaction force to the ground where it is installed to almost zero without significantly increasing the cost.

[Means to solve the problem]

The above object includes a trough, a pair of front and rear first inclined leaf springs that connect the trough to the base, a facing mass disposed below the trough, and a front and rear pair of first inclined leaf springs that connect the facing mass to the base. a second inclined leaf spring; a drive electromagnet fixed to one of the trough and the opposing mass; and a drive electromagnet fixed to the other;
This is achieved by an electromagnetic vibration folder consisting of an armature attracted to the drive electromagnet.

[For production]

An electromagnetic vibration feeder comprising a trough coupled to a base by a pair of front and rear first inclined leaf springs, and an opposing mass coupled to the base by a pair of front and rear second inclined leaf springs, An alternating attractive force is generated between the drive electromagnet fixed to one of the trough and the opposing mass and the armature fixed to the other, and the trough and the opposing mass are drawn toward and away from each other. Both vibrate with a phase difference of 180@. Therefore, it is transmitted to the base. The reaction force can be reduced to almost zero.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an electromagnetic vibration feeder according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

In the figure, the electromagnetic vibration feeder is indicated as (1) as a whole, its trough part (2) extends linearly from side to side in Figure 1, and the trough body (5) is shaped like a gutter as shown in Figure 3. The trough body (5) has an iU-shaped cross section, and has a material input port (4) at one end and a material discharge port (3) at the other end. A lug (7) is integrally formed, and according to this embodiment, a lid (6) is applied to this and closed by a bolt (8).

That is, the trough has a closed structure. As described later, when the trough part (2) vibrates, the material input from the input port (4) is transferred to the left in FIG. 9) to the next process.

As clearly shown in FIG. 3, a pair of U-shaped square members (10a, 10b) are fastened together with the bolts (8) on the ears (7) of the trough (5), and At the lower waterfall part, a pair of prismatic leaf springs are mounted on blocks (12a) (x
2b) is fixed by a bolt συ. This is the first
As shown in the figure, a pair of inclined leaf springs (16a
) (16a) (16b) (16b) is fixed to the spacer spout (b) with bolts. Further, as clearly shown in FIG. 3, the leaf spring mounting block (12a) (1
2b), the movable core (b) as a T-shaped armature is connected to the gel via the spacers (13a) and (13b).
15a) (15b) and its arm portion (14a) (1
4b).

That is, according to this embodiment, the movable core α4 is located at the trough portion (2).
It is configured integrally with the trough side movable part and constitutes the mass of the trough side movable part. Also, this movable core (B) has an L-shape when viewed from the side as shown in Figure 1, and an inverted-shape when viewed from the other side. Its horizontal portion (14C) faces the magnetic pole surface of the magnetic pole with an air gap in between. The above-mentioned arm parts (14a) and (14b) extend from this vertical part (14d), and as described above, these arm parts (15a) and (t5b) are attached to the leaf spring mounting bracket (12m) ( 12b).

As clearly shown in Figure 3, the electromagnet is disposed below the trough part (2) and is integrally fixed to the balance way (111) extending linearly from side to side. As shown in FIG.
0b) is coupled to the above-mentioned pace block αη.

Furthermore, according to this embodiment, the trough side plate tea (t
ea) (16b) (16b) and the balance weight side leaf springs (20a) (20a) (20b) (20b) have the same inclination angle. The entire electromagnetic vibration feeder (1) is supported on the floor by a vibration isolating rubber, but according to the present invention, this is not necessarily necessary and is used to further reduce the reaction force transmitted to the ground. . Further, the entire vibration driving section including the plate springs (161), (16a), etc. configured as described above is closed by a cylindrical cover cover. Furthermore, according to this embodiment, the trough part (2) and the plate springs are attached to the blocks (12a) (12b), the mass of the trough side movable part consisting of the movable core α line, etc., and the drive unit that connects this to the base air αη. Leaf springs (16a) (16a) (16b)
The resonant frequency determined by the total spring constant of (16b) combines the mass of the balance weight side movable part consisting of the balance weight α9 and the electromagnet ■ fixed to it, the balance weight α and the pace block (b). The resonant frequency determined by the total spring constant of the leaf springs (20a) (20a) (20b) (20b) is determined to match.

Further, according to this embodiment, the dimensions and mass distribution of each part are determined so that the center of gravity of the entire trough-side movable section and the center of gravity of the entire balance weight-side movable section described above substantially coincide. Or, the straight line connecting these centers of gravity is the leaf spring (16a) (16b
) (20a) (20b) The vibration direction of the trough portion (2) determined by the inclination angle of (20b) is set to be parallel to the vibration direction.

The vibratory feeder according to the embodiment of the present invention is constructed as described above, and its operation will be explained next.

When alternating current is applied to the coil (211), an alternating attractive force is generated between the electromagnet and the horizontal part (14c) of the movable core (b), and the trough (2) and the balance weight force are opposed to each other with a phase difference of 1800. It vibrates in the direction of the leaf springs (16a) (16a) (16b) (16b
) and (20a), (20a), (20b), and (20b), and the trough portion (2) and the balance weight 4 vibrate in a direction perpendicular to these longitudinal directions. Furthermore, since the center of gravity of the trough-side movable section and the center of gravity of the balance weight-side movable section are substantially aligned, the trough (2) vibrates uniformly over the entire left and right sides.

When the configuration of this embodiment is viewed from a vibrational perspective, a vibration system as shown in FIG. 4 is constructed. That is, the mass of the movable part on the trough side is ml, the mass of the pace support (17) is - and the mass of the balance weight side is mH, and the spring constant of the spring that connects these masses and the pace block αη is expressed as ml. As shown in Figure 4, if , k, and ks, the alternating attractive force between the electromagnet and the movable core α is Fs inω
If t is 180 as shown by the arrow in Figure 4.
° The excitation force with a different phase, therefore, these masses m,
, mH vibrate close to the resonant frequency, so they vibrate with a phase difference of 180° from each other. That is, the time when the mass hire town is the closest to the pace block is the time when it is the closest to the pace block, and the time when it is furthest from this is the time when it is the furthest from each other. Moreover, since these masses m and oscillate with a phase difference of 180', the reaction forces transmitted to the pace block αη, that is, the mass −, are in opposite directions and cancel each other out. That is, the amplitude of the mass m1 of the trough side movable part is Xl, and the spring constant is k.

Therefore, a reaction force of 1 is applied to the mass m), and as a reaction force with the opposite phase, the amplitude of m3 x the spring constant,
is transmitted to mass m. Therefore xIXk, =x3Xk
3, the reaction force applied to the mass of the pace block (b) is completely canceled out, and the reaction force transmitted to the ground becomes zero. In this case, the anti-vibration spring (T) is not needed, but since there is actually a slight imbalance, the reaction force that can be transmitted to the ground by the anti-vibration spring (T) is extremely large. It can be made small.

The embodiments of the present invention have been described above, but of course the present invention is not limited thereto, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the movable core (X4) is fixed to the trough portion (2) side, and the electromagnet is fixed to the balance weight CIQ, but this may be reversed.

That is, the electromagnet may be fixed to the trough portion (2) side, and the movable core (b) may be fixed to the balance weight σI side.

Further, in the above embodiment, the shape of the movable core α♦ is L-shaped when viewed from one side, but instead of this, it may be shaped so that it simply hangs downward. In this case, for example, the E-type electromagnet is directed downward in the embodiment, but may be installed horizontally. In addition, if the movable core α fathom is L-shaped when viewed from one side as in the embodiment, it is easier to obtain a structure for aligning the center of gravity of the balance weight side movable part with the center of gravity of the trough side movable part. Can be done. Alternatively, it is possible to easily obtain a configuration in which the straight line connecting these centers of gravity is parallel to these vibration directions t1''i.Also, in the above embodiment, the resonant frequency of the trough side movable part and the resonant frequency of the balance weight side movable part are Although they are assumed to be equal, it does not matter if they are different.In short, in order to make the reaction force applied to the base block an almost zero, (the swing width of the movable part on the trough side)
× (spring constant of the leaf spring that connects this to the α force side of the base block) is (swing width of the movable part on the balance weight side) × (spring constant of the leaf spring that connects this to the α force side of the base block) Just make sure they are equal.

〔Effect of the invention〕

As described above, according to the electromagnetic vibration feeder of the present invention,
The reaction force on the ground or floor where the vibratory feeder is installed can be reduced to zero, and this can be done at low cost and with small weight.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of an electromagnetic vibration feeder according to an embodiment of the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a sectional view taken along the ]I[-I line in FIG. A schematic diagram showing a vibration system for explaining the working principle of the embodiment and FIG. 5 are side views of a conventional electromagnetic vibration feeder. In the figure,

Claims (3)

[Claims] (1) A trough, a pair of front and rear first inclined plate springs that connect the trough to the base, a facing mass disposed below the trough, and a pair of front and rear inclined leaf springs that connect the facing mass to the base. An electromagnetic vibration feeder comprising a second inclined plate spring, a drive electromagnet fixed to one of the trough and the opposing mass, and an armature fixed to the other and attracted to the drive electromagnet. (2) The electromagnetic vibration feeder according to claim 1, wherein the armature has a substantially L-shape when viewed from the side, and a horizontal portion thereof faces the magnetic pole surface of the drive electromagnet with a gap therebetween. (3) The center of gravity of the trough-side movable part and the center of gravity of the opposing mass-side movable part substantially coincide, but a straight line connecting these centers of gravity is substantially parallel to the vibration direction of the trough and the opposing mass. The electromagnetic vibration feeder according to item (1) or (2).