JP2740891B2 - Piezoelectric drive type transfer device - Google Patents
Piezoelectric drive type transfer deviceInfo
- Publication number
- JP2740891B2 JP2740891B2 JP18594689A JP18594689A JP2740891B2 JP 2740891 B2 JP2740891 B2 JP 2740891B2 JP 18594689 A JP18594689 A JP 18594689A JP 18594689 A JP18594689 A JP 18594689A JP 2740891 B2 JP2740891 B2 JP 2740891B2
- Authority
- JP
- Japan
- Prior art keywords
- spring plate
- elastic body
- plate
- amplification
- transfer device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Jigging Conveyors (AREA)
- Feeding Of Articles To Conveyors (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） 本発明は、搬送物として電気素子または機械部品等の
ように比較的小さい部品を、振動により搬送する搬送伝
達媒体の振動源として圧電素子を用いた圧電駆動形搬送
装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to the vibration of a transfer medium for transferring a relatively small part such as an electric element or a mechanical part as a transferred object by vibration. The present invention relates to a piezoelectric-driven transfer device using a piezoelectric element as a source.
（従来の技術） 圧電素子を振動源とした圧電駆動形パーツフィーダと
しては、インライン形パーツフィーダとボウル形パーツ
フィーダがある。(Prior Art) As a piezoelectric drive type parts feeder using a piezoelectric element as a vibration source, there are an in-line type parts feeder and a bowl type parts feeder.
第３図は、従来のインライン形パーツフィーダの構成
を示す。同図に於て、１は基台、２は、この基台１に互
いに平行で且つ傾斜して立上る２本の継ぎばね板３、加
振ばね板４及び増幅ばね板５をボルト6a,6b,6cにより連
結し、この増幅ばね板５にボルト6dで連結して水平に支
持されたトッププレート、７は小部品の搬送物８を乗せ
る搬送伝達媒体、例えばトラフで、トッププレート２上
に支持されている。９は、各加振ばね板４に接着などに
より取付けられた圧電素子で、これには端子10,11に与
えられた交流電圧がリード線10a,11aを介して印加され
るようになっている。12は、搬送物８を円滑に搬送すべ
く振動をある程度抑制するためのおもりで、加振ばね板
４及び継ぎばね板３と共に一緒に連結されている。FIG. 3 shows a configuration of a conventional in-line type parts feeder. In FIG. 1, reference numeral 1 denotes a base, and 2 denotes two joint spring plates 3, a vibrating spring plate 4, and an amplifying spring plate 5 which stand parallel to and inclined from the base 1 with bolts 6a, 6b, 6c, a top plate connected to the amplifying spring plate 5 by bolts 6d and horizontally supported, and 7 is a transfer medium for carrying a small-parts conveyed object 8, for example, a trough. Supported. Reference numeral 9 denotes a piezoelectric element attached to each of the vibrating spring plates 4 by bonding or the like, to which an AC voltage applied to terminals 10, 11 is applied via lead wires 10a, 11a. . Numeral 12 is a weight for suppressing vibration to some extent so as to smoothly convey the conveyed object 8, and is connected together with the vibrating spring plate 4 and the joint spring plate 3.
このように構成された装置に於て、各加振板ばね４と
これに接着した圧電素子９とで加振体であるバイモルフ
（VERNITRON PIEZO Electric DIVISIONの商品名）13を
構成しており、その圧電素子９に交流電圧を印加して励
振すると、その各圧電素子９は正の半サイクルで伸び、
負の半サイクルで縮む運動を行うことから、それぞれの
圧電素子９に印加する電圧を半サイクルずらせば、その
バイモルフ構造によって前記伸縮運動がたわみ運動に変
換されて、継ぎばね板３と基台１との連結部を支点と
し、増幅ばね板５を介して矢印14方向にトラフ７を振動
させ、搬送物８を矢印15方向に移動させる。In the apparatus configured as described above, each of the vibrating leaf springs 4 and the piezoelectric element 9 adhered thereto constitute a bimorph (trade name of VERNITRON PIEZO Electric DIVISION) 13, which is a vibrating body. When an AC voltage is applied to the piezoelectric elements 9 to excite them, each of the piezoelectric elements 9 expands in a positive half cycle,
Since the contraction motion is performed in a negative half cycle, if the voltage applied to each piezoelectric element 9 is shifted by a half cycle, the expansion and contraction motion is converted into a bending motion by the bimorph structure, and the joint spring plate 3 and the base 1 are moved. The trough 7 is vibrated in the direction of the arrow 14 via the amplification spring plate 5 with the connection portion with the fulcrum as the fulcrum, and the transported object 8 is moved in the direction of the arrow 15.
（発明が解決しようとする課題） 上記のように構成された従来の圧電駆動形パーツフィ
ーダに於ては、バイモルフ13による励起された振動が増
幅ばね板５に伝達され、振幅を増大させてトッププレー
ト２を介してトラフ７に伝達されることになる。しかし
ながら、この時増幅ばね板５とバイモルフ13及びトップ
プレート２とは、ボルト6cおよび6dで強固に締結されて
いる。そこで、バイモルフ13及びトップレート２に比べ
て剛性が小さい増幅ばね板５には、かなり大きな主とし
て曲げの繰返し応力が作用することになるから、疲労破
壊に対しては十分注意を払う必要がある。同様に継ぎば
ね板３にも曲げの繰返し応力が作用するが、増幅ばね板
５に比べて振幅が小さいから、発生する曲げの繰返し応
力もまた小さい。従って、疲労破壊に対しては、特に増
幅ばね板５に発生する曲げの繰返し応力について考慮す
る必要がある。(Problems to be Solved by the Invention) In the conventional piezoelectric drive type part feeder configured as described above, the vibration excited by the bimorph 13 is transmitted to the amplification spring plate 5 and the amplitude is increased to increase the top. It is transmitted to the trough 7 via the plate 2. However, at this time, the amplification spring plate 5 and the bimorph 13 and the top plate 2 are firmly fastened with bolts 6c and 6d. Therefore, a considerably large repetitive bending stress mainly acts on the amplifying spring plate 5 whose rigidity is smaller than that of the bimorph 13 and the top rate 2, so that sufficient attention must be paid to fatigue failure. Similarly, repeated bending stress acts on the joint spring plate 3, but since the amplitude is smaller than that of the amplification spring plate 5, the generated bending repeated stress is also smaller. Therefore, it is necessary to take into account, in particular, the repetitive bending stress generated in the amplification spring plate 5 with respect to fatigue failure.
本発明は、バイモルフとトラフとの間に設けられる増
幅ばね板の締結部の応力を低減し、増幅ばね板の機械的
強度を十分確保することができる圧電駆動形搬送装置を
提供することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a piezoelectric drive type transfer device which can reduce stress at a fastening portion of an amplification spring plate provided between a bimorph and a trough and can sufficiently secure mechanical strength of the amplification spring plate. And
（課題を解決するための手段） 本発明は、基台に、圧電素子を弾性体に取付けてなる
加振体を介して搬送伝達媒体を設け、この加振体の一端
を前記搬送伝達媒体と第１の弾性体で連結すると共に、
他端を第２の弾性体及びおもりと連結し、第１の弾性体
の振動により搬送伝達媒体を振動させて搬送物を搬送す
るようにした圧電駆動形搬送装置に於て、第１の弾性体
及び第２の弾性体を加振体の両側に平行して配置したも
のである。(Means for Solving the Problems) According to the present invention, a transport transmission medium is provided on a base via a vibrating body in which a piezoelectric element is attached to an elastic body, and one end of the vibrating body is connected to the transport transmitting medium. While connecting with the first elastic body,
In a piezoelectric drive type transport device in which the other end is connected to a second elastic body and a weight, and the transporting medium is vibrated by the vibration of the first elastic body to transport the transported object, The body and the second elastic body are arranged in parallel on both sides of the vibrating body.
（作 用） 第１の弾性体及び第２の弾性体の長さを長くすること
ができるので、従来と同じ振動数を得るためには板厚を
厚くすることができ、締結部に発生する応力を低減し疲
労破壊をなくすことができる。(Operation) Since the lengths of the first elastic body and the second elastic body can be lengthened, the plate thickness can be increased in order to obtain the same frequency as in the past, and the thickness of the first elastic body and the second elastic body is increased at the fastening portion. Stress can be reduced and fatigue fracture can be eliminated.
（実施例） 以下、本発明の一実施例を図面を参照して説明する。
第１図は、本発明の一実施例のインライン形パーツフィ
ーダを示す正面図であり、第２図は第１図の斜視図を示
す。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an in-line type part feeder according to one embodiment of the present invention, and FIG. 2 is a perspective view of FIG.
第１図および第２図に於て、１は基台、21は、基台１
に対して傾斜するように、一部を基台１に設けたねじ孔
1aにボルト6aで固定された継ぎばね板、22は継ぎばね板
21の外側に平行して配置され、この他端にスペーサ23及
びボルト6bを介して一端を固定され、中間の両面には圧
電素子９を接着などにより取付けた加振ばね板、24は、
この加振ばね板22の外側に平行して配置され、この他端
にスペーサ25,ボルト6c及びナット6eを介して一端を固
定された増幅ばね板である。トッププレート２は、ねじ
孔2aにボルト6dをねじ込むことにより、増幅ばね板24の
他端に取付けられる。トラフ７は、トッププレート２の
上部に支持されている。なお、継ぎばね板21,加振ばね
板22及び増幅ばね板24は、一対のものが平行となるよう
に基台１の両側に配置して設けられている。また、圧電
素子９には、図示しないリード線を介して交流電圧が印
加される。1 and 2, 1 is a base, 21 is a base 1
Screw holes partially provided in the base 1 so as to be inclined with respect to
Spring plate fixed with bolts 6a to 1a, 22 is a spring plate
A vibrating spring plate 24 is disposed in parallel with the outside of 21, one end of which is fixed to the other end via a spacer 23 and a bolt 6 b, and the piezoelectric element 9 is attached to both intermediate surfaces by bonding or the like.
An amplification spring plate is disposed in parallel with the outside of the vibration spring plate 22 and has one end fixed to the other end thereof via a spacer 25, a bolt 6c and a nut 6e. The top plate 2 is attached to the other end of the amplification spring plate 24 by screwing a bolt 6d into the screw hole 2a. The trough 7 is supported on the top of the top plate 2. Note that the joint spring plate 21, the excitation spring plate 22, and the amplification spring plate 24 are provided on both sides of the base 1 so that a pair of them is parallel. Further, an AC voltage is applied to the piezoelectric element 9 via a lead wire (not shown).
上記したように、継ぎばね板21,加振ばね板22及び増
幅ばね板24は、基台１に対し傾斜をもってそれぞれ平行
に、且つ互い違いに配置されているため、従来の直線状
に連結した構成に比べて増幅ばね板24および継ぎばね板
21の寸法を長くすることができる。本実施例によれば、
この増幅ばね板24の長さを従来に比べて３倍以上にでき
る。寸法を長くすることができれば、継ぎばね板21,加
振ばね板22,増幅ばね板24及びおもり12で構成される系
の振動数を従来と同様にするためには、増幅ばね板24の
板厚を厚くすることができる。板厚を厚くすることがで
きれば、増幅ばね板24の締結部に発生する応力を低減す
ることができる。As described above, the joint spring plate 21, the excitation spring plate 22, and the amplification spring plate 24 are arranged in parallel with each other with an inclination with respect to the base 1, and are alternately arranged. Amplifying spring plate 24 and joint spring plate
21 can be lengthened. According to the present embodiment,
The length of the amplification spring plate 24 can be made three times or more as compared with the conventional case. If the dimensions can be lengthened, the plate of the amplifying spring plate 24 must The thickness can be increased. If the plate thickness can be increased, the stress generated in the fastening portion of the amplification spring plate 24 can be reduced.
そこで、継ぎばね板21,加振ばね板22,増幅ばね板24及
びおもり12で構成される系の振動数を従来と同様にする
ための増幅ばね板24の板厚を求める。両端固定条件と考
えて、次の（１）式で求められる。Therefore, the plate thickness of the amplification spring plate 24 is determined so that the frequency of the system constituted by the joint spring plate 21, the excitation spring plate 22, the amplification spring plate 24, and the weight 12 is the same as the conventional one. Considering both-end fixed conditions, it can be obtained by the following equation (1).
但し、ｆは振動数,lは増幅ばね板の長さ，λは境界条
件によって定まる値，ρは増幅ばね板の単位体積当りの
重量,Aは増幅ばね板の断面積,Eは増幅ばね板の材料の縦
弾性係数,Iは増幅ばね板の断面二次モーメント（Ｉ＝lh
3/12,hは板厚）である。 Where f is the frequency, l is the length of the amplifying spring plate, λ is a value determined by the boundary conditions, ρ is the weight per unit volume of the amplifying spring plate, A is the cross-sectional area of the amplifying spring plate, and E is the amplifying spring plate. Is the longitudinal modulus of elasticity of the material, and I is the second moment of area (I = lh
3/12, h is the plate thickness).
増幅ばね板の長さを３倍とし、従来と振動数が同じと
すると、（１）式により、板厚は約5.2倍厚くすること
ができる。増幅ばね板を両端固定と考え、等分荷重が加
わるとすると、締結部に発生する応力は次の（２）式で
求められる。Assuming that the length of the amplifying spring plate is tripled and the frequency is the same as the conventional one, the plate thickness can be increased by about 5.2 times according to the equation (1). Assuming that the amplification spring plate is fixed at both ends and a uniform load is applied, the stress generated in the fastening portion can be obtained by the following equation (2).
但し、ρは増幅ばね板の応力,hは増幅ばね板の板厚,P
は増幅ばね板に加わる荷重,lは増幅ばね板の長さであ
る。 Where ρ is the stress of the amplification spring plate, h is the thickness of the amplification spring plate, and P
Is the load applied to the amplification spring plate, and l is the length of the amplification spring plate.
従って、振動数を同じとすると、増幅ばね板の長さが
３倍になればその板厚は、約5.2倍に厚くすることがで
き、増幅ばね板の締結部に発生する応力を（２）式より
1/3に低減することができ、疲労破壊に対する裕度がき
わめて大きくなる。Therefore, when the frequency is the same, if the length of the amplification spring plate is tripled, the plate thickness can be increased to about 5.2 times, and the stress generated at the fastening portion of the amplification spring plate is (2) From the formula
It can be reduced to 1/3, and the tolerance for fatigue fracture becomes extremely large.
以上説明したように本発明によれば、増幅ばね板の長
さを長くし且つ板厚を厚くすることができるから、締結
部に発生する応力を低減でき、疲労破壊のない信頼性の
高い圧電駆動形搬送装置を提供することができる。As described above, according to the present invention, since the length of the amplification spring plate can be increased and the plate thickness can be increased, the stress generated in the fastening portion can be reduced, and a highly reliable piezoelectric material without fatigue failure can be obtained. A drive-type transfer device can be provided.
第１図は本発明の一実施例を示す正面図、第２図は第１
図に示す本発明の一実施例の斜視図、第３図は従来の圧
電駆動形搬送装置を一部切断して示す正面図である。 １……基台、２……トッププレート ７……トラフ、９……圧電素子 12……おもり、21……継ぎばね板 22……加振ばね板、24……増幅ばね板FIG. 1 is a front view showing an embodiment of the present invention, and FIG.
FIG. 3 is a perspective view of one embodiment of the present invention shown in FIG. 3, and FIG. DESCRIPTION OF SYMBOLS 1 ... Base, 2 ... Top plate 7 ... Trough, 9 ... Piezoelectric element 12 ... Weight, 21 ... Joint spring plate 22 ... Exciting spring plate, 24 ... Amplifying spring plate
Claims (1)
加振体を介して搬送伝達媒体を設け、この加振体の一端
を前記搬送伝達媒体と第１の弾性体で連結すると共に、
他端を第２の弾性体及びおもりと連結し、前記第１の弾
性体の振動により前記搬送伝達媒体を振動させて搬送物
を搬送するようにした圧電駆動形搬送装置に於て、前記
第１の弾性体及び第２の弾性体を、前記加振体の両側に
平行して配置したことを特徴とする圧電駆動形搬送装
置。A transfer medium is provided on a base via a vibrating body in which a piezoelectric element is attached to an elastic body, and one end of the vibrating body is connected to the transfer medium by a first elastic body. Along with
The other end is connected to a second elastic body and a weight, and the vibration of the first elastic body causes the transfer medium to vibrate to convey a conveyed object. A piezoelectric driven transfer device, wherein the first elastic body and the second elastic body are arranged in parallel on both sides of the vibrating body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18594689A JP2740891B2 (en) | 1989-07-20 | 1989-07-20 | Piezoelectric drive type transfer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18594689A JP2740891B2 (en) | 1989-07-20 | 1989-07-20 | Piezoelectric drive type transfer device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0351210A JPH0351210A (en) | 1991-03-05 |
| JP2740891B2 true JP2740891B2 (en) | 1998-04-15 |
Family
ID=16179648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18594689A Expired - Lifetime JP2740891B2 (en) | 1989-07-20 | 1989-07-20 | Piezoelectric drive type transfer device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2740891B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106429329A (en) * | 2016-11-29 | 2017-02-22 | 深圳市晶展鑫电子设备有限公司 | Round-trip type linear feeder |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4123776C2 (en) * | 1991-07-18 | 1995-03-30 | Schindler Peter | Vibration linear conveyor |
| TW200700300A (en) * | 2005-03-11 | 2007-01-01 | Shinko Electric Co Ltd | Parts feeder |
| JP2008044704A (en) * | 2006-08-11 | 2008-02-28 | Daishin:Kk | Vibration type conveying device |
| DE202008012759U1 (en) * | 2007-07-06 | 2009-01-08 | Feintool Intellectual Property Ag | Linear vibratory conveyor |
| DE102007031639B4 (en) * | 2007-07-06 | 2010-07-22 | Feintool International Holding | Linear vibratory conveyor |
| DE102007036491B4 (en) | 2007-08-01 | 2010-07-22 | Feintool Intellectual Property Ag | Linear vibratory conveyor |
| JP2009057124A (en) * | 2007-08-30 | 2009-03-19 | Ntn Corp | Oscillation type parts conveying device |
| JP5158411B2 (en) * | 2007-10-31 | 2013-03-06 | 日東工業株式会社 | High-precision holding means for vibration feeder installation position |
| JP3167576U (en) * | 2011-02-17 | 2011-04-28 | 株式会社 Ｂｆｃ | Piezoelectric parts feeder |
| JP5227449B2 (en) * | 2011-11-02 | 2013-07-03 | 株式会社ダイシン | Vibrating transfer device |
-
1989
- 1989-07-20 JP JP18594689A patent/JP2740891B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106429329A (en) * | 2016-11-29 | 2017-02-22 | 深圳市晶展鑫电子设备有限公司 | Round-trip type linear feeder |
| CN106429329B (en) * | 2016-11-29 | 2018-08-21 | 深圳市晶展鑫电子设备有限公司 | Reciprocation type straight line feeder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0351210A (en) | 1991-03-05 |
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