JPH0312730Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to the structure of a vibrating body, and particularly to the configuration of a vibrating body suitable for generating an excitation force in a vibrating feeder.

[Conventional technology]

Of course, when a vibrating feeder is used to discharge something, such as a medicine, whose discharge amount must be precisely controlled, the vibrating feeder, which is the discharging device, is naturally required to have high accuracy.

FIG. 5 shows a conventional configuration of a vibrating feeder used when it is necessary to precisely control the amount of medicine or the like discharged.

Reference numeral 30 in the figure represents a lower base, and this lower base 30 is fixed to a predetermined floor portion 31 by fixing means such as screws 32. 33 is this lower base 30
The upper base is arranged parallel to the lower base 30 at the upper part of the base, and these upper and lower bases 30 and 3
3, plate springs 34 and 35 are interposed between them. These leaf springs are fixed to the upper and lower ends of each base with screws 36, and the upper base 33 is configured to vibrate due to the attractive force of the electromagnetic section and the elasticity of the leaf springs 34 and 35. That is, by applying an AC voltage to the electromagnetic part 37, a magnetic force is generated in the core 39 around which the coil 38 is wound, and the actuating body 40 fixed to the upper base 33 is attracted to the core, and when not attracted, the plate spring The elasticity of 34 and 35 applies a force to return to the original position. The upper base vibrates in response to the frequency of the alternating current voltage due to the intermittent attractive force in the electromagnetic section and the elasticity of the leaf spring, and the powder in the hopper 41 is discharged through the trough 42.

[Problem that the invention attempts to solve]

In the conventional vibrating feeder whose configuration is shown above, there are the following problems in the vibrating body, such as the hopper, that applies an excitation force to the member containing the waste, and it is desirable to solve these problems. It is rare.

That is, the conventional structure basically consists of an upper base, a lower base, and leaf springs interposed between these upper and lower bases, and these members constitute a rober bar, and each leaf spring and the base are connected to each other with screws. However, since the vibrating body vibrates at its natural frequency and harmonic frequency, the screws gradually loosen due to this vibration. Loosening of the screws causes distortion in the Roberval, causing a change in the natural frequency, and the excitation force becomes unstable. As a result, the powder and granules to be discharged may be unevenly distributed within the trough, and the movement of the powder and granules in the trough may become irregular, making it impossible to discharge the powder and granules accurately. . In addition, an adjustment mechanism using screws or the like is required to maintain a perfect Roberval mechanism. For this reason, measures have been taken to prevent the screws from loosening, such as using various washers, but none of these methods can completely prevent the screws from loosening.

[Means for solving problems]

The present invention has been constructed in view of the above-mentioned problems.

In the conventional configuration, the leaf spring and the upper and lower bases are formed separately and are connected using fixing means such as screws.
Recognizing that it is impossible to completely fix the leaf spring and the base, the present invention has a structure in which the joints between the upper and lower bases and the leaf spring are integrally formed. be.

[Effect]

The present invention has a structure in which the joints between the upper and lower bases and the leaf springs are integrally formed, thereby preventing the occurrence of loosening of the joints between the bases and the leaf springs. This allows a stable vibration state to be maintained at all times.

〔Example〕

1 and 2 show a first embodiment of the invention.

Arrow 1 indicates a vibrating body. This vibrating body is integrally formed from a single metal block by electrical discharge machining or the like. Code 2 is the lower base, 3 is the upper base,
Reference numeral 4 denotes an actuating body protruding from the upper base, and the upper and lower bases 3 and 2 are formed by connecting a cavity 5 to one metal block.
Reference numerals 6 and 7 designate leaf spring portions that are integrally formed with the upper and lower bases by forming the void portion 5. In order to impart appropriate elasticity to the plate spring portions 6 and 7, steel or the like having a predetermined elasticity is suitable as the constituent material of the metal block forming the vibrating body.
8 is a long hole formed in the leaf spring parts 6 and 7;
This is for rotating the bolt (screw) 9 for attaching the electromagnetic part from outside the operating body. Leaf spring part 6
The reason why a similar elongated hole is formed in the plate spring part 6 is to make the cross-sectional area of the leaf spring part 6 almost equal to the cross-sectional area of the leaf spring part 7, and to make the elasticity of both leaf spring parts almost equal. . It should be noted that it is difficult to reduce the wall thickness of these leaf spring parts too thin only by forming the voids 5, but by adjusting the formation area of the elongated holes, the cross-sectional area of the leaf spring parts can be reduced. This allows the elasticity of the leaf spring portion to be set over a wide range.

10 is an electromagnetic part, which includes a core 11 and this core 11.
It is fixed to the lower base 2 by the bolts 9 mentioned above, and is arranged to face the actuating body protruding from the upper base 3 side. The vibrating body 1 is constructed as described above, and the upper base 3, which is the vibrating part of the vibrating body 1, has a hopper 13 that stores discharged materials such as powder and granules, and a hopper 13 that is connected to the hopper and is connected to the hopper for discharging. A trough 14 is attached for carrying out the operation. Further, the lower base 2 is fixed to a predetermined floor surface 15 using fixing means such as bolts. 1
6 is a screw hole into which this bolt is screwed.

In the above configuration, when an AC voltage is applied to the electromagnetic part 10, the core 11 around which the coil 12 is wound
A magnetic force is generated, and the actuating body 4 protruding from the upper base 3 side is attracted to the core 11, and when it is not attracted, a force is applied to return it to its original position due to the elasticity of the plate spring parts 6 and 7. The upper base 3 vibrates in response to the frequency of the AC voltage due to the intermittent attractive force of the electromagnetic part and the elasticity of the leaf spring parts 6 and 7, and the waste in the hopper 13 is discharged through the trough 14. do. In this case, the upper and lower bases and the leaf springs are integrated, so even if the vibration is applied for a long time or relatively strong, the entire vibrating body will not be distorted, and a stable vibration state will be maintained at all times. Therefore, high discharge accuracy can be maintained. Further, in an overloaded state, the actuating body 4 hits the lower base 2 side, thereby preventing the spring parts 6 and 7 from buckling.

FIG. 3 shows another embodiment.

In this embodiment, the vibrating body 1 is formed of two blocks, and the two blocks are connected at the upper and lower base portions.

One block integrally forms the upper base 3a, the operating body 4, the leaf spring section 6, and the lower base 2a. The other block integrally forms the upper base 3b, the leaf spring portion 7, and the lower base 2b. The joint part of the upper base has a dovetail groove 17 on the upper base 3b side.
After forming a dovetail 18 to engage this dovetail groove 17 on another upper base 3a side and engaging both,
Both upper bases 3a and 3b are connected with bolts or the like. Note that when a connection means such as welding is employed, reliable connection can be achieved without using such a dovetail groove. Furthermore, since the lower bases do not vibrate, the lower bases 2a and 2b can be sufficiently connected to each other by forming a simple stepped portion as shown in the figure.

Since this configuration uses two blocks, it is easy to process the metal blocks for forming the vibrating body. Furthermore, the mounting of the electromagnetic part 10 is the same as in the first embodiment, but since the electromagnetic part mounting part is open before connecting the two blocks, unlike the previous embodiment, the actuating body Opposing surface 10a
You can also install it from here.

Note that although the upper and lower bases themselves are formed separately, the leaf spring portion is integrally formed with these bases, so there is a risk that the connection between the leaf spring portion and the base may become loose. There is no such thing. Also, the upper base 3 which is the vibrating part
Since it does not itself act as an elastic body,
Even if there is a connection in this part, the connection will not loosen easily. Furthermore, if the connections are made by welding, there will be no loosening of the connections.

FIG. 4 shows a third embodiment.

In this embodiment, the actuating body is formed separately from the vibrating body main body, which consists of upper and lower bases 3, 2 and leaf spring parts 6, 7 integrally formed with these bases. Reference numeral 20 denotes this separately formed operating body, which is fixed to the upper base 3 with screws 21. This configuration not only makes it easier to work the entire vibrating body, but also
If the operating body 20 is made of a magnetic material, the vibrating body main body can be made of any material such as a non-magnetic aluminum alloy such as duralumin, or stainless steel. Further, this material does not necessarily have to be metal, and may be, for example, plastic as long as it has a certain degree of elasticity.

〔effect〕

By integrally forming the leaf spring parts on the upper and lower bases as described above, the present invention eliminates the possibility of loosening of the joint between the base and the leaf springs, and allows this vibrating body to be used as a vibration feeder, etc. When used in a device, the device can be maintained in a stable vibration state at all times.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a vibrating body showing a first embodiment of the present invention, Fig. 2 is a view taken along line A-A in Fig. 1, and Fig. 3 is a vibrating body showing another embodiment. FIG. 4 is a vertical cross-sectional view of a vibrating body showing a third embodiment, and FIG. 5 is a vertical cross-sectional view of a conventional vibration feeder. 1... Vibrating body, 2, 2a... Lower base, 3, 3
a... Upper base, 4, 20... Operating body, 6, 7...
...Plate spring part, 10...Electromagnetic part, 11...Core, 1
2...Coil, 17...Dovetail groove.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A leaf spring is interposed between the upper base and the lower base, and the upper base is moved by the elasticity of the leaf spring and a suction means such as an electromagnetic part provided on the lower base. A vibrating body for a device for vibrating a table, characterized in that an upper base, a lower base, and a leaf spring are integrally formed. (2) The vibrating body according to claim 1 of the utility model registration, characterized in that the upper base, the lower base, and the leaf spring are formed from one metal block. (3) The upper base and the lower base are each divided into two parts, and the upper base and lower base of one of the divided parts and the leaf spring are integrally formed with one metal block, and the other divided upper base is formed integrally with the leaf spring. and the lower base and the other leaf spring are integrally formed by other metal blocks, and the upper and lower bases of both blocks are connected to each other, as set forth in claim 1 of the utility model registration claim. vibrating body. (4) A practical use characterized in that an upper base, a lower base, and a leaf spring are integrally formed to form a vibrating body, and an operating body formed as a magnetic body is connected to this vibrating body. Scope of patent registration request No. 1
The vibrating body according to any one of items 1 to 3.