WO2009147698A1 - Buffer device of excitation device - Google Patents
Buffer device of excitation device Download PDFInfo
- Publication number
- WO2009147698A1 WO2009147698A1 PCT/JP2008/001410 JP2008001410W WO2009147698A1 WO 2009147698 A1 WO2009147698 A1 WO 2009147698A1 JP 2008001410 W JP2008001410 W JP 2008001410W WO 2009147698 A1 WO2009147698 A1 WO 2009147698A1
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- WO
- WIPO (PCT)
- Prior art keywords
- air
- air cylinder
- piston
- shock absorber
- vibration
- Prior art date
Links
- 230000005284 excitation Effects 0.000 title abstract 2
- 230000035939 shock Effects 0.000 claims description 42
- 239000006096 absorbing agent Substances 0.000 claims description 39
- 239000003638 chemical reducing agent Substances 0.000 abstract description 9
- 238000009412 basement excavation Methods 0.000 description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000003139 buffering effect Effects 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- 239000002689 soil Substances 0.000 description 4
- 239000013049 sediment Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/24—Drilling using vibrating or oscillating means, e.g. out-of-balance masses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/0209—Telescopic
- F16F9/0218—Mono-tubular units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/43—Filling or drainage arrangements, e.g. for supply of gas
Definitions
- the present invention relates to an excavator that uses vibration generated by an exciter, or a pile / sheet pile driving device that uses vibration to prevent the vibration of the exciter from being transmitted to the main body.
- the present invention relates to a shock absorber.
- a rubber damper has a natural frequency, and depending on the frequency, resonance occurs and cannot absorb vibration.
- the pressing force of the excavation bit on the excavation surface during excavation is large.
- the solid rubber damper cannot sufficiently absorb vibration, and the buffering action may be insufficient.
- the natural frequency of the air spring is expressed by equation (1).
- the force to push the cylinder increases, the air cylinder internal volume (v) decreases, and the cylinder internal pressure (p) increases, so the spring constant (K) increases. Therefore, since the natural frequency can be changed according to the external condition (external force) received by the shock absorber, it can be used as a shock absorber for a vibration exciter that is used by changing the vibration frequency, and gas is used. Since it is a device, it can cope with high vibrations as compared with a shock absorber using rubber.
- the vibration exciter 1 incorporated in a drilling device or the like rotates two eccentric weights 11 and 11 arranged in parallel in opposite directions to cancel horizontal vibrations in the vertical direction. It is a device that extracts only vibration.
- a frame 28 provided with a shock absorbing rubber receiving plate is installed on the upper part of the case 10 of the eccentric weight 11, and between the frame 28 and the inner surface of the slider 29.
- the vibration-providing device 1 is fixed to the slider 29 via the shock-absorbing rubber 24.
- a spindle 3 that is rotatably mounted is connected to the lower end of the vibration generator 1, and a lower part of the spindle 3 is connected to a speed reducer 4 that can move up and down, and a prime mover provided in the speed reducer 4.
- (Hydraulic motor) 5 has a structure in which a rotational force is applied via a gear.
- the vibration generated by the vibration generator 1 is transmitted from the vibration generator 1 to a spindle 3 and a drilling bit (not shown) at the tip of a boring rod (not shown).
- the spindle 3 is movable in the vertical direction, and the vibration is buffered and not transmitted to the speed reducer 4.
- the upper portion of the case 10 of the vibration generator 1 is fixed to a slider 29 via a buffer rubber 24, and the generated vibration is attenuated by the buffer rubber 24.
- ⁇ Shear stress G: Shear elastic modulus
- L Rubber thickness
- ⁇ Deflection amount A: Shear area of rubber.
- the shock absorber using rubber since the shock absorber using rubber has a natural frequency, it is an integral multiple of the natural frequency of the device in order to buffer so as not to generate resonance and transmit vibration to the main body. It is necessary to design the shock absorber appropriately so as not to vibrate at a frequency of. However, since the vibration frequency of the vibration generator may be changed according to the situation, a shock absorber using rubber that inevitably generates a natural frequency is not preferable. In addition, rubber has a drawback that it cannot absorb high frequency vibrations.
- Patent Document 1 Japanese Patent Laid-Open No. Hei 8-232570
- an air spring composed of an air cylinder is used as shown in Patent Document 1 (Japanese Patent Laid-Open No. Hei 8-232570)
- a shock absorber consisting of an air cylinder and a piston used in combination with a vibration generator, and a one-way valve is provided at the intake and exhaust ports provided in the air cylinder. In addition to being introduced into the air cylinder, it is automatically enclosed in an air cylinder to exert a buffering action.
- a shock absorber using air cannot be replenished with air leaking from a packing portion or the like unless air is supplied by a compressor or the like. Because the exciter connected to the piston is heavy, the shock absorber piston is lowered by raising the drill head, and the air is sucked into the air cylinder.
- the one-way valve By arranging the one-way valve, the outflow of air when the air in the air damper chamber is compressed is prevented. Further, by providing an elastic body such as rubber or a spring at the bottom of the air cylinder, the impact when the piston collides with the bottom of the air cylinder is buffered, and the generation of vibration and noise are suppressed.
- Sectional drawing of the state which integrated the shock absorber into the excavator which has a vibration generator The expanded sectional view of the buffering device of the present invention. Operation
- Example 1 In the soil contamination investigation machine, it is not preferable that the collected sample is disturbed by water. Therefore, unlike normal excavation, the excavation is performed without water. In the case of anhydrous excavation, the excavated sediment cannot be discharged to the ground using water, so the excavation of the excavated sediment is insufficient, so the excavated sediment needs to be pressed into the formation around the excavation hole, The excavation bit is excavated in a state where it is constantly pressed against the excavation surface. For this reason, the direction of vibration to be buffered is only one direction, and it is only necessary to make the buffering action effective only in the excavation direction. As shown in FIG. 1, the vibration generator 1 has two eccentrics housed in the case 10. The weights 11 are rotated in opposite directions to cancel horizontal vibrations and only vertical vibrations are taken out.
- the spindle 3 is rotatably attached to the lower portion of the vibration generator 1 via a thrust bearing 31 and a journal bearing 32, and vibration generated by the vibration generator 1 is transmitted to the spindle 3.
- the spindle 3 is mounted on a speed reducer 4 so as to be movable up and down.
- the rotation of a prime mover 5 such as a hydraulic motor provided in the speed reducer 4 is transmitted to the spindle 3 via a gear 41, and the spindle 3 vibrates. And rotate.
- the shock absorber 2 composed of the piston 21 and the air cylinder 22 shown in detail in FIG. 2 is fixed to the lower side of the vibration generator 1, and the piston 21 and the air cylinder 22 are provided with a packing 28 for keeping airtightness. is there.
- An air inlet 6 is provided in the upper part of the air cylinder 22, and a check valve 25 that allows only intake air is provided in the air inlet 6.
- the case 10 and the air cylinder 22 are connected by a detent 13 to prevent the vibration generator 1 from rotating due to the rotation of the spindle 3.
- the detent 13 has one end fixed to the case 10 with a bolt, and the other end provided with an enormous portion for retaining is inserted into a hole provided in the overhang provided in the air cylinder 22,
- the air cylinder 22 can move up and down with respect to the vibration generator 1.
- a cushioning rubber 24 is provided at the bottom of the air cylinder 22, and the surface thereof is uneven to adjust the spring constant. The rubber 24 can alleviate the impact when the piston 21 collides with the bottom of the air cylinder 22 to some extent, and an anti-vibration effect is obtained.
- a drill head D including a vibration generator 1, a shock absorber 2, and a speed reducer 4 is attached to a mast M provided in a mobile machine so as to be movable up and down as shown in FIG.
- a boring rod is connected to the lower end of the spindle 3 with a lower screw, and the vibration generated by the vibration generator 1 is transmitted to the boring rod and further to the excavating bit via the spindle 3 and excavation proceeds.
- the pressing force of the excavation bit necessary for excavation on the ground is obtained by the force when the drill head D is lowered along the mast M.
- the shock absorber When the drill head D is raised along the mast M at the start of excavation, the air cylinder 22 is raised, the piston 21 is relatively lowered, the air damper chamber 23 is formed, and the surrounding atmosphere is sucked through the check valve 25. The air damper chamber 23 is filled with air.
- the drill head D When the drill head D is lowered, since the excavation bit is in contact with the excavation surface, the piston 21 cannot be lowered, and the air cylinder 22 is lowered relative to the piston 21. However, since the check valve 25 does not release air to the atmosphere side, the air in the air damper chamber 23 is compressed.
- the force that lowers the drill head D and the force (cross-sectional area ⁇ air pressure) obtained by the pressure in the air damper chamber 23 are balanced, the descent of the drill head D stops.
- the natural frequency of the air damper is determined based on Equation (1) depending on the state at this time.
- the vibration is buffered and excavation can be performed with an appropriate vibration isolation effect.
- the natural frequency of the shock absorber can be changed by adjusting the force that lowers the drill head D, the vibration frequency of the vibration generator can be changed without causing resonance.
- Example 2 In Example 1, in order to collect high-quality soil samples in polluted soil surveys, etc., water sampling for excavation from the excavation hole is not performed, and excavation sampling is performed. Since it is pressed into the ground and not discharged to the ground, the excavation bit is pressed against the excavation surface for excavation, and the direction of vibration to be buffered is only one direction. On the other hand, when it is used in general boring fields such as construction of water wells and grounding work, water can be sent for soil removal. For this reason, a part of the weight of the boring rod or the like may be received by the drill head and excavation may be required while pulling the boring rod upward. In the second embodiment, even if a certain amount of weight of the boring rod or the like is lifted upward by the drill head, vibration generated by the vibration generator 1 can be buffered by the air shock absorber. It is a buffer for vibration.
- the vibration generator 1 is the same as that of the first embodiment.
- a shock absorber 2 including a piston 21 and an air cylinder is provided on both sides of the case 10 of the vibration generator 1, and a piston rod 26 of the shock absorber 2 is connected to the case 10 with a pin.
- a packing 28 is provided to keep the space between the piston 21 and the air cylinder 22 in an airtight state.
- An intake port 60 is provided in the lower part of the air cylinder 22 of the shock absorber 2, and a check valve 61 having a structure in which air can be sucked into the lower part of the air cylinder 22 and cannot be exhausted.
- the pressurized air generated by an air compressor (not shown) or the like is pumped to the piston 21, the piston 21 is raised by the pressurized air, and an air damper chamber 23 'is formed.
- a groove is formed in the middle of the air cylinder 22, and a hole 271 that communicates with the atmosphere is provided in the groove.
- the air damper chamber 23 can be used to absorb vibrations in only one direction by introducing air from the atmosphere into the air damper chamber 23 as in the first embodiment.
- the shock absorber of the present invention can be used as a shock absorber for a machine that uses vibration, and is applicable not only to a vibration / rotation excavator but also as a shock absorber for a vibration-type driving device in which a construction member such as a sheet pile is built. Is possible.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
空気緩衝装置(エアダンパー)の場合、空気バネの固有振動数は式(1)で示される。
K=γ・p・A2/v (1)
ここで、K:バネ定数 γ:ポリトロープ指数 p:エアシリンダー内圧
A:ピストン面積 v:シリンダー内容積である。
式(1)によれば、シリンダーを押す力が大きくなってエアシリンダー内容積(v)が小さくなり、シリンダー内圧(p)が高くなるため、バネ定数(K)は大きくなる。従って、緩衝装置が受ける外的条件(外力)により固有振動数を変化させることができるので、振動数を変更して使用する起振装置の緩衝装置として利用可能であり、また、気体を利用した装置であるため、ゴムを利用した緩衝装置に比較して高振動にも対応することが可能である。 A rubber damper has a natural frequency, and depending on the frequency, resonance occurs and cannot absorb vibration. In addition, in a rotary / vibration type excavator, the pressing force of the excavation bit on the excavation surface during excavation is large. As a result, the solid rubber damper cannot sufficiently absorb vibration, and the buffering action may be insufficient.
In the case of an air shock absorber (air damper), the natural frequency of the air spring is expressed by equation (1).
K = γ ・ p ・ A 2 / v (1)
Where K: Spring constant γ: Polytropic index p: Air cylinder internal pressure
A: Piston area v: Cylinder volume.
According to equation (1), the force to push the cylinder increases, the air cylinder internal volume (v) decreases, and the cylinder internal pressure (p) increases, so the spring constant (K) increases. Therefore, since the natural frequency can be changed according to the external condition (external force) received by the shock absorber, it can be used as a shock absorber for a vibration exciter that is used by changing the vibration frequency, and gas is used. Since it is a device, it can cope with high vibrations as compared with a shock absorber using rubber.
起振装置1の下端には回転自在に取り付けられたスピンドル3が連結してあり、このスピンドル3の下方は上下動可能に減速機4に接続されており、この減速機4に設けてある原動機(油圧モーター)5からギアを介して回転力を与えられる構造となっている。 As shown in FIG. 6, the vibration exciter 1 incorporated in a drilling device or the like rotates two eccentric weights 11 and 11 arranged in parallel in opposite directions to cancel horizontal vibrations in the vertical direction. It is a device that extracts only vibration. In the conventional shock absorber 2 incorporated in the
A
起振装置1のケース10の上部は、緩衝用ゴム24を介してスライダー29に固定されており、発生した振動は、この緩衝用ゴム24によって減衰される。
緩衝装置であるゴムのせん断応力(τ)は、
τ=G・δ/Lであることから、このバネ定数(k)は、k=A・G/Lとなる。
ここで、τ:せん断応力 G:せん断弾性係数 L:ゴムの厚み δ:たわみ量 A:ゴムのせん断面積である。 The vibration generated by the
The upper portion of the
The shear stress (τ) of rubber, which is a shock absorber, is
Since τ = G · δ / L, this spring constant (k) is k = A · G / L.
Here, τ: Shear stress G: Shear elastic modulus L: Rubber thickness δ: Deflection amount A: Shear area of rubber.
空気を緩衝装置に利用したエアダンパーとしては、特許文献1(特開平8-232570)に示されるように、エアシリンダーからなる空気バネを用いるものであり、エアシリンダーに圧力空気を供給し、前記の式(1)に基づいてバネ係数を調整して固有振動数を変更することが提案されている。
この方式は、大掛かりな装置においては特に問題とならないが、小型の装置ではエアコンプレッサーを装備することがコスト面、小型化の面で障害となっており、エアコンプレッサーを必要としなくてもバネ係数を変更できる空気緩衝装置が要望されている。 As described above, since the shock absorber using rubber has a natural frequency, it is an integral multiple of the natural frequency of the device in order to buffer so as not to generate resonance and transmit vibration to the main body. It is necessary to design the shock absorber appropriately so as not to vibrate at a frequency of. However, since the vibration frequency of the vibration generator may be changed according to the situation, a shock absorber using rubber that inevitably generates a natural frequency is not preferable. In addition, rubber has a drawback that it cannot absorb high frequency vibrations.
As an air damper using air as a shock absorber, as shown in Patent Document 1 (Japanese Patent Laid-Open No. Hei 8-232570), an air spring composed of an air cylinder is used. It has been proposed to change the natural frequency by adjusting the spring coefficient based on the equation (1).
This method is not particularly problematic for large-scale equipment, but the installation of an air compressor is an obstacle in terms of cost and miniaturization in small equipment, and the spring coefficient is not required even if an air compressor is required. There is a demand for an air shock absorber capable of changing the above.
一般に、空気を利用した緩衝装置にはコンプレッサー等でエアを供給しなければパッキング部分等から漏れていく空気を補充できないが、緩衝装置を搭載する起振装置を含むドリルヘッドがマストに沿って上下動できること、更に、ピストンに繋がった起振装置の重量が大きいので、ドリルヘッドを上昇させることにより、緩衝装置のピストンが下がり、エアシリンダー内に大気が吸引され、その吸入口にチェッキバルブ等の一方向弁を配置することにより、空気ダンパー室内の空気が圧縮されるときのエアの流出を防止している。
また、エアシリンダーの底部にゴム、スプリング等の弾性体を配設することによってピストンがエアシリンダー底部に衝突するときの衝撃を緩衝し、振動の発生や騒音を抑制している。 A shock absorber consisting of an air cylinder and a piston used in combination with a vibration generator, and a one-way valve is provided at the intake and exhaust ports provided in the air cylinder. In addition to being introduced into the air cylinder, it is automatically enclosed in an air cylinder to exert a buffering action.
In general, a shock absorber using air cannot be replenished with air leaking from a packing portion or the like unless air is supplied by a compressor or the like. Because the exciter connected to the piston is heavy, the shock absorber piston is lowered by raising the drill head, and the air is sucked into the air cylinder. By arranging the one-way valve, the outflow of air when the air in the air damper chamber is compressed is prevented.
Further, by providing an elastic body such as rubber or a spring at the bottom of the air cylinder, the impact when the piston collides with the bottom of the air cylinder is buffered, and the generation of vibration and noise are suppressed.
10 ケース
11 偏心ウエイト
13 回り止め
2 緩衝装置
21 ピストン
22 エアシリンダー
23 空気ダンパー室
24 ゴム(弾性体)
25 チェッキバルブ
26 ピストンロッド
271穴
28 パッキング
3 スピンドル
4 減速機
5 原動機(油圧モーター)
6 吸気口 DESCRIPTION OF
25
6 Inlet
土壌汚染調査機においては、採取試料が水で乱されることは好ましくないので、通常掘削とは異なり無水で掘削がおこなわれる。無水掘削の場合、掘削土砂を水を使用して地上へ排出することができないので、掘削土砂の排除が不十分となるので、掘削土砂を掘削穴周辺の地層に圧密して押し込む必要があり、掘削ビットは、常時掘削面に押し付けた状態での掘削となる。このため、緩衝する振動の方向は一方向のみとなり、掘削方向についてのみ緩衝作用を有効とすればよい
図1に示すように、起振装置1は、ケース10内に収納された2個の偏心ウエイト11を互いに逆方向に回転させ、水平方向の振動を相殺させて上下方向の振動のみを取り出している。 Example 1
In the soil contamination investigation machine, it is not preferable that the collected sample is disturbed by water. Therefore, unlike normal excavation, the excavation is performed without water. In the case of anhydrous excavation, the excavated sediment cannot be discharged to the ground using water, so the excavation of the excavated sediment is insufficient, so the excavated sediment needs to be pressed into the formation around the excavation hole, The excavation bit is excavated in a state where it is constantly pressed against the excavation surface. For this reason, the direction of vibration to be buffered is only one direction, and it is only necessary to make the buffering action effective only in the excavation direction. As shown in FIG. 1, the
図2に示すように、エアシリンダー22の底部には緩衝用のゴム24が設けてあり、その表面はバネ定数を調節するため凸凹にしてある。ピストン21がエアシリンダー22底面に衝突したときの衝撃をこのゴム24がある程度緩和することができ、防振効果が得られる。 As shown in FIG. 1, the
As shown in FIG. 2, a cushioning
スピンドル3の下端には下部ネジでボーリングロッドが接続され、起振装置1で発生した振動は、スピンドル3を介してボーリングロッド、更に、掘削ビットに伝えられ掘削が進行する。掘削に必要な掘削ビットの地盤への押し付け力は、ドリルヘッドDをマストMに沿って降下させる際の力によって得られる。 A drill head D including a
A boring rod is connected to the lower end of the
掘削開始時にドリルヘッドDをマストMに沿って上昇させると、エアシリンダー22が上昇し、ピストン21が相対的に下がり空気ダンパー室23が形成され、周囲の大気がチェッキバルブ25を通って吸入され、空気ダンパー室23に空気が充填される。
次に、ドリルヘッドDを降下させると、掘削ビットは掘削面に接触しているのでピストン21は降下できず、エアシリンダー22がピストンに21に対して相対的に下降するので、空気ダンパー室23の容積は縮小されるが、チェッキバルブ25が空気を大気側に放出させないので、空気ダンパー室23の空気は圧縮される。ドリルヘッドDを降下させる力と空気ダンパー室23の圧力によって得られる力(断面積×空気圧)が釣り合ったところでドリルヘッドDの降下は停止する。 The operation of the shock absorber according to the present invention will be described below.
When the drill head D is raised along the mast M at the start of excavation, the
Next, when the drill head D is lowered, since the excavation bit is in contact with the excavation surface, the
起振装置1を作動させ、掘削面への掘削ビットの押し付け力を調整することにより振動は緩衝され、適切な防振効果を得て掘削することができる。
以上のように、コンプレッサーによって空気ダンパー室に空気を供給する代わりに、ドリルヘッドDをマストMに沿って上昇させることによって空気ダンパー室23にチェッキバルブ25を通って空気が吸引されて空気が充填され、ドリルヘッドDを降下させる力を調節することによって緩衝装置の固有振動数を変更することができるので、共振をおこすことなく起振装置の振動数を変更することができる。 The natural frequency of the air damper is determined based on Equation (1) depending on the state at this time.
By oscillating the
As described above, instead of supplying air to the air damper chamber by the compressor, by raising the drill head D along the mast M, air is sucked into the
実施例1は、汚染土壌調査等において、高質の土壌サンプルを採取するため、掘削孔からの排土のための送水はおこなわずに掘削サンプリングをおこなうものであり、掘削土を圧密により周囲の地盤に圧し込み地上に排土しないので、掘削ビットを掘削面に押し付けて掘削するものであり、緩衝する振動の方向は一方向のみである。
一方、水井戸の構築や接地工事等の一般ボーリング分野で使用する場合には排土のための送水が可能である。このためボーリングロッド等の重量の一部をドリルヘッドで受け、ボーリングロッドを上側に引っ張りながら掘削することが求められる場合がある。
実施例2は、ボーリングロッド等の重量の一定量をドリルヘッドで上向きに持ち上げた状態でも起振装置1で発生させる振動を空気緩衝装置で緩衝させることができるようにしたものであり、両方向の振動を緩衝するものである。 Example 2
In Example 1, in order to collect high-quality soil samples in polluted soil surveys, etc., water sampling for excavation from the excavation hole is not performed, and excavation sampling is performed. Since it is pressed into the ground and not discharged to the ground, the excavation bit is pressed against the excavation surface for excavation, and the direction of vibration to be buffered is only one direction.
On the other hand, when it is used in general boring fields such as construction of water wells and grounding work, water can be sent for soil removal. For this reason, a part of the weight of the boring rod or the like may be received by the drill head and excavation may be required while pulling the boring rod upward.
In the second embodiment, even if a certain amount of weight of the boring rod or the like is lifted upward by the drill head, vibration generated by the
緩衝装置2のエアシリンダー22の下部には吸気口60が設けてあり、吸気口60には、エアシリンダー22の下部に吸気ができ、排気ができない構造のチェッキバルブ61が組み込まれ、吸気口60にはエアーコンプレッサー(図示しない)等で発生させた加圧空気が圧送され、この加圧空気によりピストン21が上昇し、空気ダンパー室23’が形成される。 As shown in FIGS. 4 and 5, the
An
この平衡位置において、起振機1で生じた振動は、ケース10を介して緩衝装置2に伝達され、振動が吸収される。 A groove is formed in the middle of the
At this equilibrium position, the vibration generated by the
空気ダンパー室23’に圧縮空気を充填しない場合は、実施例1と同様に空気ダンパー室23に大気から空気を導入することによって一方向のみの振動の吸収に使用することができる。 That is, assuming that the pressure b (MPa) for supporting the
When the air damper chamber 23 'is not filled with compressed air, the
Claims (3)
- 起振装置と組み合わせて使用するエアシリンダーとピストンからなる緩衝装置であって、エアシリンダーの上部に設けた吸気口に吸入のみが可能な一方向弁が設けてあり、エアシリンダーとピストンの相対運動により空気がエアシリンダー内に導入されて封入される緩衝装置。 A shock absorber composed of an air cylinder and a piston used in combination with a vibration generator, and a one-way valve that can only be inhaled is provided at the intake port provided at the top of the air cylinder, and the relative movement of the air cylinder and the piston A shock absorber in which air is introduced into an air cylinder and sealed.
- 請求項1において、エアシリンダーの底部に設けた吸気口に吸入のみが可能な一方向弁が設けてあり、かつ、エアシリンダーの中間部に大気に通ずる穴を設けた溝が形成してあり、底部の吸気口から加圧空気を導入することができる緩衝装置。 In claim 1, a one-way valve capable of only inhalation is provided at an intake port provided at a bottom portion of the air cylinder, and a groove provided with a hole communicating with the atmosphere is formed in an intermediate portion of the air cylinder, A shock absorber capable of introducing pressurized air from the bottom inlet.
- 請求項1または2において、エアシリンダーの底部に緩衝用の弾性体が設けてある緩衝装置。 3. The shock absorber according to claim 1, wherein a shock absorbing elastic body is provided at the bottom of the air cylinder.
Priority Applications (4)
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CN200880126075.7A CN101932788B (en) | 2008-06-04 | 2008-06-04 | Buffer device of excitation device |
JP2010515669A JP4886068B2 (en) | 2008-06-04 | 2008-06-04 | Shock absorber shock absorber |
PCT/JP2008/001410 WO2009147698A1 (en) | 2008-06-04 | 2008-06-04 | Buffer device of excitation device |
HK11106520.3A HK1152362A1 (en) | 2008-06-04 | 2011-06-23 | Buffer device of excitation device |
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PCT/JP2008/001410 WO2009147698A1 (en) | 2008-06-04 | 2008-06-04 | Buffer device of excitation device |
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JP (1) | JP4886068B2 (en) |
CN (1) | CN101932788B (en) |
HK (1) | HK1152362A1 (en) |
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WO2011124090A1 (en) * | 2010-04-07 | 2011-10-13 | Guo David Wei | Pile driver with air pressure buffer |
KR101209152B1 (en) | 2011-04-05 | 2012-12-06 | 이산강업 주식회사 | No noise drilling machine |
CN109915526A (en) * | 2017-12-13 | 2019-06-21 | 株洲飞马橡胶实业有限公司 | A kind of novel more bellows rubber air springs |
JP2020112020A (en) * | 2019-01-09 | 2020-07-27 | 野原工業株式会社 | Construction device of levee waterproof wall and construction method of levee waterproof wall |
CN112098140A (en) * | 2020-08-22 | 2020-12-18 | 深圳华力岩土工程有限公司 | Geological exploration equipment and exploration method thereof |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2011124090A1 (en) * | 2010-04-07 | 2011-10-13 | Guo David Wei | Pile driver with air pressure buffer |
KR101209152B1 (en) | 2011-04-05 | 2012-12-06 | 이산강업 주식회사 | No noise drilling machine |
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JP2020112020A (en) * | 2019-01-09 | 2020-07-27 | 野原工業株式会社 | Construction device of levee waterproof wall and construction method of levee waterproof wall |
JP7007747B2 (en) | 2019-01-09 | 2022-01-25 | 野原工業株式会社 | Ridge waterproof wall construction equipment and ridge waterproof wall construction method |
CN112098140A (en) * | 2020-08-22 | 2020-12-18 | 深圳华力岩土工程有限公司 | Geological exploration equipment and exploration method thereof |
CN112098140B (en) * | 2020-08-22 | 2024-02-13 | 深圳华力岩土工程有限公司 | Geological survey equipment and method |
CN116696984A (en) * | 2023-08-08 | 2023-09-05 | 河北彪悍运动器械有限公司 | Air damper |
CN116696984B (en) * | 2023-08-08 | 2023-10-20 | 河北彪悍运动器械有限公司 | air damper |
Also Published As
Publication number | Publication date |
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CN101932788A (en) | 2010-12-29 |
HK1152362A1 (en) | 2012-02-24 |
JPWO2009147698A1 (en) | 2011-10-20 |
CN101932788B (en) | 2014-10-29 |
JP4886068B2 (en) | 2012-02-29 |
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