JPH06345238A - Vibration transfer device - Google Patents

Abstract

PURPOSE:To provide a vibration transfer device which facilitates adjustment and exceedingly reduces the unnecessary vibration. CONSTITUTION:A lower frame 12 is fixed on a base board 11, and a tuning fork type vibrator element 10 which is integrally formed from a tuning fork type metal part 13 and a piezoelectric element 14 through adhesion is fixed on the lower frame 12. One top edge part of the tuning fork type vibrator element 10 is connected with an upper frame 16 having a transfer body 17 fixed, by a connecting part 15. The other top edge part of the tuning fork type vibrator element 10 is connected with a holding metal fitting 18 having an additional mass 19 fixed, by a connecting part 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device for transferring an article such as a mechanical part or an electronic part by vibration.

[0002]

2. Description of the Related Art In a conventional vibrating and conveying apparatus, a vibrating body that vibrates a conveying body generates only one vibration displacement regardless of whether an electromagnetic force is used as a driving source or a piezoelectric power is used as a driving source. Is. FIG. 9 shows the construction principle. 1
Is a base 2, 2 is a lower frame supported by the base 1, 8 is a piezoelectric bimorph oscillator joined to the lower frame 2 by bolts, a metal plate 3 having a spring property, and a piezoelectric element adhered thereto It is composed of 4. Reference numeral 6 denotes an upper frame which is fixed to the piezoelectric bimorph vibrator 8 with bolts and is horizontally supported via two leaf springs 5 which are parallel to each other and stand up while being inclined, and 7 is a carrier medium on which an object to be conveyed is placed, for example, It is supported on the upper frame 6 by a trough. In this device, the metal plate 3 and the piezoelectric element 4 adhered to it constitute a piezoelectric bimorph oscillator 8 which is a vibrating body. An alternating voltage is applied to the piezoelectric element 4 to generate a flexural movement. The trough 7 connected by the bending motion of the piezoelectric bimorph vibrator 8 is vibrated in an obliquely vertical direction indicated by the arrow, and the conveyed object is moved along the trough 9 in the direction of the arrow 9. In this conventional example, there are two support portions for fixing the piezoelectric bimorph vibrator 8 on the lower frame, and one support portion fixes one bimorph vibrator. A structure in which a plurality of bimorph vibrators are fixed from one support portion is naturally possible according to the same structure principle. In the above, the in-line feeder is shown as an example, but similarly for the bowl type parts feeder, two or four bimorphs are attached in the circumferential direction at intervals of 180 degrees or 90 degrees, respectively. It is the same as the inline feeder. Further, in this example, the driving method using the piezoelectric element is shown, but the same motion can be applied to the trough by the method using electromagnetic force.

[0003]

However, in the above-described conventional vibration transfer device, the vibration of the piezoelectric bimorph vibrator 8 shown in FIG. 9 is transmitted to the trough 7, but at this time, the vibration is applied to the trough 7 and then to the base 1. Also, vibration energy is transmitted. As a remedy for this, a plurality of bimorph vibrators were arranged on one support part of the lower frame to balance the vibration energy in the support part so as to prevent unnecessary vibration from being transmitted to the base. However, even if this improvement measure is adopted, there is no doubt that vibration is transmitted to the support portion and vibration energy is transmitted to the entire device. That is, even if the improvement measures are adopted, it is necessary to balance the vibration energy in the entire system.
In practice, this is very difficult to achieve. Therefore, regardless of adoption of the improvement measures, the entire vibration conveyance device causes unnecessary vibration through the base 1. Due to this cause, the transfer efficiency of the vibration transfer device naturally lowers. The vibration of the base 1 is also transmitted to the installation table on which the vibration transfer device is mounted. Therefore, there is a difference in the transmission of vibration energy to the installation table due to the shape and physical properties of the installation table. Therefore, the performance of the vibration transfer device changes when the installation table is changed. Therefore, when the installation base is changed, there is a drawback that the vibration transfer device must be adjusted so that the transfer capability of the vibration transfer device is maximized. Naturally, the vibration and noise of the vibration conveyance device and the installation table due to unnecessary vibration are also disadvantages. The present invention solves the above-mentioned conventional problems and provides a vibrating and conveying device that makes it difficult to transmit unnecessary vibration energy image to the base 1.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a vibrating and conveying apparatus according to the present invention has one or a plurality of vibrators, and each vibrating device has one vibration. The oscillator as the source has two or more arm portions for transmitting the vibration displacement to the mating member, and is composed of two sets of arm portions that vibrate in opposite phases regardless of the number of arm portions.

In order to solve the above problems, the vibrator for vibrating the carrier has two sets of arm parts, and one set of arm parts is the retracting part. Is used as a driving source for vibrating, and a mass is added to the tip of the arm portion of the other set, and the arm portions of the other set vibrate in opposite phases. In order to solve the above problems, the vibrator has two sets of arm parts, and the arm parts of the two sets vibrate in opposite phases to each other. Each arm part vibrates one general feeder. The two transport bodies are configured to transport the transport objects in opposite directions. In order to solve the above-mentioned problems, the invention according to claim 3 is a configuration of the vibrator according to claims 1 and 2, which is a tripod tuning fork type vibrator.

[0006]

According to the operation of the present invention having the structure described in claim 1, one or more vibrators are arranged in the vibrating transfer device, but each one vibrator has two sets of arm portions. so,
The two sets of arms vibrate in opposite phases, one set as a drive source for vibrating the carrier, and the other set of arm parts vibrates by adding mass to vibrate the carrier. Can be difficult to transmit to the base.

The operation of the present invention having the structure described in claim 2 is that in the structure of the vibrating transfer device having the transfer bodies capable of respectively transferring the transfer objects, the vibrator has two sets of arm portions. , The arms vibrate in opposite phases. Then, the arm portions of each set serve as a vibration source of the carrier that vibrates in opposite phases to each other, and act on each other to make it difficult to transmit the vibration to the base.

The operation of the present invention having the structure described in claim 3 can be made into the simplest flat plate shape as the structure of the vibrator having the arm portions vibrating in mutually opposite phases.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the principle configuration of the present invention. Figure 2
FIG. 3 is an explanatory diagram of a configuration of an oscillator and electric wiring for driving the oscillator. Reference numeral 11 is a base, and 12 is a lower frame 12 for mounting the vibrator 10 on the base. The vibrator 10 has a tuning fork shape, and the tuning fork type aluminum base metal part 13 has two arms, and piezoelectric elements 14 are provided on both sides of each aluminum alloy arm.
It has a structure in which A connecting part A15 for connecting the arm part and the upper frame 16 to one arm part of the vibrator 10.
Are joined by bolts. The connecting part A15 is attached to the arm portion and the upper frame 16 at an angle. The upper frame 16 is joined to the arm portion and the carrier 17 by bolts. The other arm portion of the vibrator 10 is a connecting part B.
It is joined to 20 with a bolt. The other side of the connecting part B20 is joined with a holding metal fitting 18 for holding the additional mass 19 by a bolt. The connecting part B20 is the vibrator 1
Each of them has an angle with the arm portion of 0 and the holding metal fitting 18 and is joined with a bolt. Further, the additional mass 19 is joined to the holding metal fitting 18 with a bolt.

Next, a method of driving the vibrating and conveying apparatus having this structure will be described. It is necessary that the two arms of the vibrator 10 vibrate symmetrically, and therefore, the
When the outer piezoelectric element 14 extends in each of the arm portions, the inner piezoelectric element 14 contracts. When the outer piezoelectric element 14 contracts, the inner piezoelectric element 14 expands. By doing so, the vibrator 10 generates symmetrical bending vibration.

In order to excite such vibrations, piezoelectric elements 14 polarized in the directions of the arrows are arranged as shown in FIG. Also, regarding the electric wiring, 4 of the piezoelectric element 14 is used.
The pieces are connected in parallel and integrated into one terminal 21, and the wiring from the metal component 13 is used as the other terminal 22. These terminals 2
An AC voltage is applied between 1 and 22. The frequency of the applied AC voltage is approximately matched with the resonance frequency for generating a desired vibration mode of the vibrator. In order to excite the desired symmetrical bending vibration of the vibrator, it is of course necessary to apply a drive frequency that substantially matches the resonance frequency of the system including the carrier and the additional mass for balancing. By driving in such a desired vibration mode, it becomes possible for the first time to prevent unnecessary vibration from being generated in the device.

According to the first embodiment described in detail above,
Vibration energy for vibrating the ejecting body can be prevented from being transmitted to the entire apparatus through the base due to the effect of the vibration of the balancing arm portion. Further, since one vibrator is composed of an arm part for vibrating the carrier and an arm part for balancing, a vibration source for vibrating the carrier and a vibration source for vibrating the balance are separately provided. It is not necessary to individually adjust and match as in the case of becoming. Therefore, it is possible to obtain a vibration conveyance device which has a small amount of unnecessary vibration and which can be easily adjusted, which cannot be obtained by the conventional vibration conveyance device. Although the tuning fork type vibrator is used in the above embodiment, a Y-shaped vibrator 25 as shown in FIG.
May be used.

Further, according to the present invention, a ball-shaped parts feeder for spirally conveying a conveyed object as shown in FIG. 4 can be constructed. The Y-shaped vibrator of FIG. 3 was used. The Y-shaped oscillators 25 are fixed to the base 26 by fixing members for joining the Y-shaped oscillators 25. In this manner, four Y-shaped oscillators 25 are circumferentially arranged on the base every 90 degrees. . The Y-shaped vibrator 25 is composed of a Y-shaped metal part 23 and a piezoelectric element 24, and one end of the Y-shaped vibrator 25 is connected to a carrier support fitting 28 and a ball-shaped carrier 31 through a connecting plate 27. The other end is connected to the additional mass 30 through the balance support fitting 29. With such a structure, a ball type parts feeder having the same effect as that of the above-described embodiment can be obtained.

Further, the present invention may have a configuration in which the conveyed objects are conveyed in opposite directions by one vibrator as in the second embodiment shown in FIG. In this embodiment, the Y-shaped vibrator 25 is fixed to the lower frame 39, which is fixed to the base 38 with bolts, by bolts. However, the carrier 36, 37 and the upper frames 34, 35 supporting the carrier are different from each other. They are connected by connecting fittings having different shapes as shown by 32 and 33 depending on the transport direction.
In this configuration, the carriers 36 and 37 can each carry a product in the direction of the arrow. According to the second embodiment, it is possible to convey in opposite directions with one vibrator. Further, it is possible to construct a vibrating and conveying device which can serve as a vibration source for balancing each other, can be easily adjusted as in the first embodiment, and has less unnecessary vibration.

Further, the present invention can also be configured as in the third embodiment shown in FIGS. 6 to 8. FIG. 6 shows the basic structure of the tripod tuning fork type vibrator 40 used in this embodiment. Three arms 4 made of stainless steel plate with the shape of a tripod tuning fork
A total of six piezoelectric elements 41 are bonded to the front and back surfaces of 2, 43 and 44 to form a tripod tuning fork type vibrator 40. A particularly important form factor here is the total length L of the tripod tuning fork type oscillator 40 shown in FIG.
It is a relationship of the length L2 of the arm portion with respect to 1. If the length of the arm portion is too long, there is a drawback that vibration of the arm portion is transmitted to the base portion of the vibrator. This results in the same performance as when three bimorph oscillators are arranged. Therefore, the length of the arm portion or the length L2 of the groove is set to 9/10 or less of the total length L1 of the vibrator so that the base portion of the vibrator does not vibrate. In FIG. 7, the tripod tuning fork type vibrator of FIG. 6 is modified for vibration transfer. However, the Y type tripod tuning fork vibrator 50 has a tripod tuning fork-shaped plate 51 and an arm portion 53 made of an iron alloy similarly to the configuration of FIG. , 54, 55, and the piezoelectric element 52 adhered thereto. Also in this configuration, the length of the arm portion with respect to the entire length of the vibrator is preferably 9/10 or less in order not to vibrate to the base portion of the vibrator.

Now, a third embodiment having three carriers 63, 64 and 65 using the tripod tuning fork type vibrator 40 will be described with reference to FIG. The tripod tuning fork type oscillator 40 is joined to the lower frame 61 attached to the base 60 with bolts. The tip portion of the tripod tuning fork type vibrator 40 has carrier bodies 63, 64, 65.
And a connecting plate 62 made of metal. The three conveyors 63, 64, 65 convey the conveyed objects in the directions of the arrows. Next, the driving method of this configuration will be described. The vibration phases of the two outer arms 42 and 44 and the vibration phase of the central arm 43 of the tripod tuning fork type vibrator 40 are 180 degrees relative to each other.
Vibrate differently. To provide such a vibration mode, an AC voltage may be applied to the piezoelectric element 41 to generate a desired vibration mode.

By using the tripod tuning fork vibrator 40 as in this embodiment, it is possible to construct a vibration carrying device which can be constructed in the same manner as in the case of using a normal bimorph oscillator and is easy to adjust and has less unnecessary vibration. .

[0018]

According to the present invention described in detail above, it is possible to provide a vibrating and conveying apparatus which is easy to adjust and has less unnecessary vibration. Further, according to the second aspect of the invention, it is possible to easily configure a vibrating transfer device that can transfer in both directions with a single vibrator. According to the third aspect of the invention, a vibrator having a simple structure can be configured, and an inexpensive vibrating and conveying device can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing an assembled state of a vibrating and conveying device as a first embodiment.

FIG. 2 is a schematic diagram illustrating the structure and electrical wiring of the vibrator of the first embodiment.

FIG. 3 is a schematic view showing another embodiment of the vibrator.

FIG. 4 is a schematic perspective view illustrating a ball type parts feeder according to another embodiment.

FIG. 5 is a schematic perspective view showing an assembled state of a vibration conveyance device as a second embodiment.

FIG. 6 is a schematic perspective view illustrating a tripod tuning fork vibrator according to a third embodiment.

FIG. 7 is a schematic explanatory view illustrating another embodiment of the tripod tuning fork type vibrator.

FIG. 8 is a schematic perspective view showing an assembled state of the vibration conveyance device according to the third embodiment.

FIG. 9 is a schematic perspective view showing the configuration of a conventional vibration transfer device.

[Explanation of symbols]

 10 oscillator 11 base 14 piezoelectric element 17 carrier 19 additional mass

Claims (3)

[Claims] 1. A vibrating and conveying apparatus for vibrating a carrier to convey an object, wherein a vibrator for vibrating the carrier has two or more arms, and at least one arm vibrates the carrier. Then, the other arm portion vibrates in a phase opposite to the vibration phase of the former arm portion, and a mass is added to the arm portion vibrating in the opposite phase, thereby adding a mass. 2. A vibrating and conveying device for vibrating a carrier to convey an object, wherein a vibrator for vibrating the carrier has two or more arm portions, and the arm portions have vibration phases opposite to each other. One set of vibrating reeds with the same vibration phase is used as the vibration source of the carrier to convey the goods in one direction, and the vibration phase is opposite to that of the former of the other set. A vibrating and conveying device, wherein a certain arm portion is used as a vibration source for conveying a conveyed object in a direction opposite to the former direction. 3. A vibrating and conveying apparatus for vibrating a carrier to convey an object, wherein the vibrator for vibrating the carrier is a tripod-shaped oscillator, and three vibrators are included. The two outer arm parts of the arm part vibrate in the same phase, and the inner one arm part is in the opposite phase to the vibration phase of the outer arm part. The length is 9/10 or less of the total length.