JP6148030B2 - Shock absorber and construction machine tank support structure using the same - Google Patents

Shock absorber and construction machine tank support structure using the same Download PDF

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JP6148030B2
JP6148030B2 JP2013025843A JP2013025843A JP6148030B2 JP 6148030 B2 JP6148030 B2 JP 6148030B2 JP 2013025843 A JP2013025843 A JP 2013025843A JP 2013025843 A JP2013025843 A JP 2013025843A JP 6148030 B2 JP6148030 B2 JP 6148030B2
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東　数馬
数馬 東
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Toyo Tire Corp
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Description

本発明は、緩衝具及びこれを用いた建機用タンク支持構造に係り、詳しくは、油圧ショベル、超大型ダンプトラック、クレーンなどの建機における流体タンクの支持構造やそれに用いられる緩衝具に関するものである。流体タンクとしては、燃料タンク、オイルタンク、或いは冷却水タンクなど種々のものが挙げられる。   TECHNICAL FIELD The present invention relates to a shock absorber and a construction machine tank support structure using the same, and more particularly to a fluid tank support structure in a construction machine such as a hydraulic excavator, a super large dump truck, a crane, and a shock absorber used therefor. It is. As a fluid tank, various things, such as a fuel tank, an oil tank, or a cooling water tank, are mentioned.

従来、油圧ショベル、運搬車などの建機用タンク支持構造としては、特許文献１や特許文献２に示されるように、フロアやフレームに直接支持させる構造が採られている。特許文献１にて開示される建機では、フレーム側の一対のパイプ材に作動油タンク（１２）が、そして、旋回フレームには燃料タンク（１３）がそれぞれ直接に載置支持されていた。
また、特許文献２にて開示される建機においても、燃料タンク（１１）は旋回フレームに直接載せ付けて支持する構造が採られていた。 Conventionally, as a construction machine tank support structure such as a hydraulic excavator or a transport vehicle, as shown in Patent Document 1 and Patent Document 2, a structure that directly supports a floor or a frame is employed. In the construction machine disclosed in Patent Document 1, the hydraulic oil tank (12) is directly mounted and supported on the pair of pipe members on the frame side, and the fuel tank (13) is directly mounted and supported on the revolving frame.
Also, in the construction machine disclosed in Patent Document 2, the fuel tank (11) is directly mounted on and supported by the revolving frame.

油圧ショベルなどの建機は、街中のビル建設現場の他、郊外や山林における泥濘地、荒地や傾斜地などの厳しい条件下で使用されることも多い。例えば、土砂災害現場、砂防ダム工事現場といった起伏や凹凸のある地面条件では、ショベル作業に伴う振動、機体のローリングやピッチングが繰り返されるようになり、燃料や作動油が充填された重量物である各種タンクは慣性が大きいので、その支持部には相当な応力が作用する。
そのため、場合によっては、タンクを支持する支持部に損傷が生じたり、取付ボルトが曲がるなどの不都合が出るおそれがあった。 Construction machines such as hydraulic excavators are often used under harsh conditions such as mudlands, wastelands and slopes in suburbs and mountain forests as well as building construction sites in the city. For example, in undulating or uneven ground conditions such as landslide disaster sites and sabo dam construction sites, vibrations caused by excavator work, rolling and pitching of the fuselage are repeated, and it is a heavy object filled with fuel and hydraulic oil Since various tanks have high inertia, considerable stress acts on the support portions.
Therefore, in some cases, there is a risk that the support portion that supports the tank may be damaged, or the mounting bolt may be bent.

そこで、前述の不都合のおそれを解消すべく、タンクの支持部に弾性材を用いる手段が為されたものが登場してきた。例えば、特許文献３に開示される建機では、上下に長い形状の燃料タンク（３４）を、緩衝具であるゴム製防振プレート（４４）を介して旋回台に支持させる構造が採られている。
このような弾性支持させる構造の採用により、機体の著しい挙動（慣性モーメント）の変化に耐えることができて、支持部に損傷などの不都合が生じないようにしながらタンクを良好に支持させることが実現できるように思われた。 Therefore, in order to solve the above-described inconvenience, there has appeared a device in which means for using an elastic material is used for the support portion of the tank. For example, the construction machine disclosed in Patent Document 3 employs a structure in which a vertically long fuel tank (34) is supported on a swivel base via a rubber vibration-proof plate (44) that is a shock absorber. Yes.
By adopting such an elastic support structure, it is possible to withstand significant changes in the aircraft's behavior (moment of inertia) and to support the tank well without causing any inconvenience such as damage to the support. It seemed to be possible.

特開２００７−２１７９２２号公報JP 2007-217922 A 特開２０１１−０４２９９４号公報JP 2011-042994 A 特開２０１０−０７１００５号公報JP 2010-071005 A

ところが、前述のようなタンクの弾性支持構造を有する建機において、その後も不都合の出ることがあった。例えば、特許文献３の建機においては、上下に細長い形状の燃料タンク（３４）の上部を支持させる荷重伝達部材（４８）に亀裂などの損傷の出るおそれがあることが知見されてきた。このように、重くなる大容量タンクが搭載された機種や、厳しい作業条件で繰り返し使用される機種などにおいては、依然としてタンクの支持部に問題の出るおそれが残されていた。   However, in the construction machine having the elastic support structure of the tank as described above, there have been problems afterwards. For example, in the construction machine of Patent Document 3, it has been found that the load transmission member (48) that supports the upper part of the vertically elongated fuel tank (34) may be damaged such as cracks. As described above, in a model equipped with a large-capacity tank that becomes heavy or a model that is repeatedly used under severe working conditions, there is still a possibility that a problem occurs in the support portion of the tank.

本発明の目的は、建機用流体タンク支持構造やそれに用いられる緩衝具を、さらなる工夫により、十分な弾性支持機能と十分な強度が備わったものに改良し、機体が振り回されるような厳しい作業条件もある建機における流体タンクの支持部に好適なものとして提供する点にある。   The purpose of the present invention is to improve the fluid tank support structure for construction machinery and the shock absorbers used in the construction to those with sufficient elastic support function and sufficient strength by further contrivance, and tough work such that the aircraft is swung around It exists in the point provided as a suitable thing for the support part of the fluid tank in a construction machine with conditions.

請求項１に係る発明は、緩衝具において、
流体タンク６に固定される被支持部７と前記流体タンク６を支持するための機体側の支持部８との何れか一方８と、
前記何れか一方８に形成される支持孔ｈに相対移動可能に挿通される筒状部１０を介して前記被支持部７と前記支持部８との何れか他方７に固定されるフランジ１１との上下間に、前記筒状部１０を外囲する状態で配備される第１弾性部１２と、
前記何れか他方７と前記何れか一方８との上下間に、前記筒状部１０を外囲する状態で配備される第２弾性部９とを有し、
前記第１弾性部１２及び前記第２弾性部９は、弾性部材１４と硬質板１５との一体化によって構成され、
前記第１弾性部１２及び前記第２弾性部９それぞれの内径が、前記筒状部１０の外径よりも幾分大きくなるように設定されていることを特徴とするものである。
The invention according to claim 1 is a shock absorber,
Any one of a supported portion 7 fixed to the fluid tank 6 and a support portion 8 on the airframe side for supporting the fluid tank 6;
A flange 11 fixed to one of the supported portion 7 and the support portion 8 via a cylindrical portion 10 that is inserted in a support hole h formed in any one 8 so as to be relatively movable; Between the upper and lower sides of the first elastic portion 12 deployed in a state of surrounding the cylindrical portion 10;
Between the upper and lower sides of either one of the other 7 and the one of the 8 has a second elastic portion 9 provided in a state of surrounding the cylindrical portion 10,
The first elastic part 12 and the second elastic part 9 are configured by integrating an elastic member 14 and a hard plate 15 ,
The inner diameter of each of the first elastic part 12 and the second elastic part 9 is set to be somewhat larger than the outer diameter of the cylindrical part 10 .

請求項２に係る発明は、請求項１に記載の緩衝具において、
前記第１及び第２弾性部１２，９に加えて、円形をなす前記支持孔ｈに内嵌する円筒状の前記筒状部１０を有するとともに、
前記筒状部１０の外周面１０Ａには、前記何れか一方８との滑りを促進させる低摩擦手段Ｂが装備されていることを特徴とするものである。 The invention according to claim 2 is the shock absorber according to claim 1,
In addition to the first and second elastic portions 12 and 9, the cylindrical tubular portion 10 fitted into the support hole h having a circular shape is included.
The outer peripheral surface 10 </ b> A of the cylindrical portion 10 is equipped with low friction means B that promotes sliding with any one of the above 8.

請求項３に係る発明は、請求項１又は２に記載の緩衝具において、
前記第１弾性部１２と前記第２弾性部９とが互いに同一のものに構成されていることを特徴とするものである。 The invention according to claim 3 is the shock absorber according to claim 1 or 2,
The first elastic portion 12 and the second elastic portion 9 are configured to be the same as each other.

請求項４に係る発明は、請求項１又は２に記載の緩衝具において、
前記第１弾性部１２の前記弾性部材１４における前記硬質板１５を装備していない側の端面に、前記フランジ１１が一体的に装備されていることを特徴とするものである。 The invention according to claim 4 is the shock absorber according to claim 1 or 2,
The flange 11 is integrally provided on the end surface of the first elastic portion 12 on the side where the hard plate 15 is not provided in the elastic member 14.

請求項５に係る発明は、請求項１〜４の何れか一項に記載の緩衝具において、
前記フランジ１１と前記筒状部１０とが当接し、かつ、前記筒状部１０と前記何れか他方７とが当接する状態でこれら三者１１，１０，７が相対固定される組付状態においては、前記第１及び第２弾性部１２，９の厚みが所定量減じられる予圧縮状態となるように構成されていることを特徴とするものである。 The invention according to claim 5 is the shock absorber according to any one of claims 1 to 4,
In the assembled state in which the flange 11 and the tubular portion 10 are in contact with each other, and the tubular portion 10 is in contact with the other one 7 and the three members 11, 10, 7 are relatively fixed. Is configured to be in a pre-compressed state in which the thickness of the first and second elastic portions 12, 9 is reduced by a predetermined amount.

請求項６に係る発明は、請求項１〜５の何れか一項に記載の緩衝具において、前記弾性部材が高減衰ゴムにより形成されていることを特徴とするものである。   The invention according to claim 6 is characterized in that, in the shock absorber according to any one of claims 1 to 5, the elastic member is formed of a high damping rubber.

請求項７に係る発明は、建機用タンク支持構造において、
流体タンク６に固定される被支持部７と前記流体タンク６を支持する機体側の支持部８との何れか一方８と、前記被支持部７と前記支持部８との何れか他方７との上下間に第２弾性部９を介装し、
前記何れか一方８に形成される支持孔ｈに、前記何れか他方７に上端が当接する状態の筒状部１０を相対移動可能に挿通配備し、
前記筒状部１０の下端に当接する状態のフランジ１１又は前記筒状部１０の下端に一体形成される状態のフランジ１１と、前記何れか一方８との上下間に第１弾性部１２を介装し、
前記筒状部１０に挿通される状態で装備されるボルト手段１３により、前記フランジ１１と前記何れか他方７とが前記筒状部１０を介して一体化される組付状態が形成可能に構成されるとともに、
前記第１弾性部１２及び前記第２弾性部９は、前記筒状部１０を外囲する状態の弾性部材１４と前記筒状部１０を外囲する状態の硬質板１５との一体化によって構成され、
前記第１弾性部１２及び前記第２弾性部９それぞれの内径が、前記筒状部１０の外径よりも幾分大きくなるように設定されていることを特徴とするものである。
The invention according to claim 7 is the construction machine tank support structure,
One of the supported portion 7 fixed to the fluid tank 6 and the support portion 8 on the airframe side that supports the fluid tank 6, and the other of the supported portion 7 and the supporting portion 8, The second elastic part 9 is interposed between the upper and lower sides of
The cylindrical portion 10 in a state where the upper end is in contact with either one of the other holes 7 is inserted into the support hole h formed in any one 8 so as to be relatively movable,
The first elastic portion 12 is interposed between the flange 11 in a state of being in contact with the lower end of the cylindrical portion 10 or the flange 11 in a state of being integrally formed with the lower end of the cylindrical portion 10 and the one 8. Dress
A configuration in which an assembly state in which the flange 11 and the other one 7 are integrated via the cylindrical portion 10 can be formed by the bolt means 13 provided in a state of being inserted into the cylindrical portion 10. As
The first elastic portion 12 and the second elastic portion 9 are configured by integrating an elastic member 14 that surrounds the cylindrical portion 10 and a hard plate 15 that surrounds the cylindrical portion 10. It is,
The inner diameter of each of the first elastic part 12 and the second elastic part 9 is set to be somewhat larger than the outer diameter of the cylindrical part 10 .

請求項８に係る発明は、請求項７に記載の建機用タンク支持構造において、
円筒状の前記筒状部１０の外周面１０Ａ及び／又は円形をなす前記支持孔ｈを形成する前記一方の内周面に、前記筒状部１０と前記何れか一方８との滑りを促進させる低摩擦手段Ｂが装備されていることを特徴とするものである。 The invention according to claim 8 is the construction equipment tank support structure according to claim 7,
The outer peripheral surface 10A of the cylindrical cylindrical portion 10 and / or the one inner peripheral surface that forms the circular support hole h is promoted to slide between the cylindrical portion 10 and the one 8. Low friction means B is provided.

請求項９に係る発明は、請求項７又は８に記載の建機用タンク支持構造において、前記第１弾性部１２と前記第２弾性部９とが互いに同一のものに構成されていることを特徴とするものである。   The invention according to claim 9 is the construction machine tank support structure according to claim 7 or 8, wherein the first elastic portion 12 and the second elastic portion 9 are configured to be the same. It is a feature.

請求項１０に係る発明は、請求項７又は８に記載の建機用タンク支持構造において、
前記筒状部１０の下端に当接する状態のフランジ１１を備えるとともに、前記フランジ１１は、前記第１弾性部１２の前記弾性部材１４における前記硬質板１５を装備していない側の端面に一体的に装備されていることを特徴とするものである。 The invention according to claim 10 is the construction machine tank support structure according to claim 7 or 8,
The flange 11 is in contact with the lower end of the cylindrical portion 10, and the flange 11 is integrated with the end surface of the first elastic portion 12 on the side not equipped with the hard plate 15. It is equipped with.

請求項１１に係る発明は、請求項７〜１０の何れか一項に記載の建機用タンク支持構造において、
前記第１及び第２弾性部１２，９の厚みは、共に自由状態における厚みよりも前記組付状態における厚みの方が所定量少ない値となる状態に設定されていることを特徴とするものである。 The invention according to claim 11 is the tank support structure for construction equipment according to any one of claims 7 to 10,
The thicknesses of the first and second elastic portions 12 and 9 are both set to a state in which the thickness in the assembled state is smaller by a predetermined amount than the thickness in the free state. is there.

請求項１２に係る発明は、請求項７〜１１の何れか一項に記載の建機用タンク支持構造において、前記弾性部材が高減衰ゴムにより形成されていることを特徴とする。   According to a twelfth aspect of the present invention, in the construction machine tank support structure according to any one of the seventh to eleventh aspects, the elastic member is formed of a high damping rubber.

請求項１の発明によれば、第１及び第２弾性部の何れか一方で流体タンクの荷重を、緩衝並びに防振支持することができ、かつ、第１及び第２弾性部の何れか他方で、流体タンクが上方移動しようとする力に対して緩衝作用や防振作用を行うことが可能である。これにより、通常の移動走行や作業時における流体タンクの防振及び緩衝支持が行えるとともに、凹凸や起伏の激しい悪路での移動走行や、激しい機体の上下移動や振動を伴うハードな作業時における流体タンクの上方への慣性移動や衝撃移動に対しても防振並びに緩衝作用することができる。   According to the first aspect of the present invention, the load of the fluid tank can be supported and vibration-proof and supported by one of the first and second elastic portions, and the other of the first and second elastic portions. Thus, it is possible to perform a buffering action and an anti-vibration action against the force that the fluid tank attempts to move upward. This makes it possible to provide vibration isolation and shock-absorbing support for the fluid tank during normal traveling and work, as well as traveling on rough roads with severe irregularities and undulations, and during hard work involving intense vertical movement and vibration of the aircraft. Anti-vibration and shock-absorbing action can be provided against inertial movement and impact movement upward of the fluid tank.

各弾性部は、弾性部材と硬質板との一体化によって構成されているので、弾性部材のみで構成される場合に比べて、強く圧縮された場合の弾性変形が硬質板により抑制され、弾性部材の持つばね定数の割りには高荷重に耐えることができるとか、耐久性が向上するといった利点を得ることが可能になる。
また、仕様変更などにより、流体タンクの防振機能や緩衝機能を変えることなく被支持部と支持部との上下間寸法が変更をされるような場合に、硬質板の厚さ変更によって弾性部材の厚さをそのままとする、という合理的な対策を採ることが可能であり、設計に融通が効く利点もある。 Since each elastic part is configured by integrating an elastic member and a hard plate, the elastic deformation when strongly compressed is suppressed by the hard plate as compared to the case where only the elastic member is configured, and the elastic member It is possible to obtain advantages such as being able to withstand high loads and improving durability for the spring constant of.
In addition, if the vertical dimension between the supported part and the support part is changed without changing the anti-vibration function or buffer function of the fluid tank due to specification changes, etc., the elastic member can be changed by changing the thickness of the hard plate. It is possible to take a reasonable measure of keeping the thickness of the film as it is, and there is an advantage that the design is flexible.

請求項２の発明によれば、緩衝具に横方向の力が作用した場合や、流体タンクと支持部とが相対的に回動する動きが作用した場合において、筒状部と支持部との接触による摩擦抵抗が軽減され、流体タンクの緩衝性能や防振性能が向上する利点が得られる。また、低摩擦手段の採用により、筒状部と支持部との相対的な上下の動きがスムーズになり、より緩衝具へ荷重負担させることができるという利点もある。   According to the second aspect of the present invention, when a lateral force acts on the shock absorber, or when a movement in which the fluid tank and the support portion rotate relatively acts, the cylindrical portion and the support portion The frictional resistance due to the contact is reduced, and the buffer tank performance and vibration isolation performance of the fluid tank are improved. In addition, the adoption of the low friction means has an advantage that the relative vertical movement between the cylindrical portion and the support portion becomes smooth, and the load can be more borne on the shock absorber.

請求項３の発明によれば、第１弾性部と第２弾性部とが互いに同一のものであるから、組付間違いが生じないようになるとともに、部品点数の削減や部品管理の簡素化が可能になる利点もある。   According to the invention of claim 3, since the first elastic part and the second elastic part are the same as each other, an assembly error does not occur, and the number of parts is reduced and parts management is simplified. There is also an advantage that becomes possible.

請求項４の発明によれば、フランジが第１弾性部に一体化された状態で装備されるので、別体のものとして装備される場合に比べて、組付作業が楽に行えるとともに、運搬や組付、分解時などにおける紛失おそれも激減する利点もある。   According to the invention of claim 4, since the flange is equipped in an integrated state with the first elastic portion, the assembly work can be carried out more easily and more easily compared with the case where it is equipped as a separate body. There is also an advantage that the risk of loss during assembly and disassembly is greatly reduced.

請求項５の発明によれば、第１及び第２弾性部は上下に予圧縮された状態で組付けられるので、ボルト手段の経時緩みが解消又は抑制されてガタつきなく装着できるとか、重い流体タンクを安定的に支持できるという効果がある。   According to the invention of claim 5, since the first and second elastic parts are assembled in a state of being pre-compressed up and down, loosening of the bolt means with time is eliminated or suppressed, and it can be mounted without rattling, or a heavy fluid There is an effect that the tank can be stably supported.

請求項６の発明によれば、負荷を受けるところである弾性部材を高減衰ゴムとしてあるので、より衝撃吸収性に優れるものとすることができる効果がある。   According to the sixth aspect of the present invention, since the elastic member that is subjected to the load is made of high-damping rubber, there is an effect that the shock absorption can be further improved.

請求項７の発明によれば、請求項１の発明による作用効果と同等の作用効果を奏する建機用タンク支持構造を提供することができる。そして、請求項８は請求項２の、請求項９は請求項３の、請求項１０は請求項４の、請求項１１は請求項５、請求項１２は請求項６の発明による作用効果と同等の作用効果をそれぞれ奏する建機用タンク支持構造を提供することができる。   According to the seventh aspect of the present invention, there can be provided a construction machine tank support structure that has the same operational effects as the first aspect of the present invention. The eighth aspect of the invention is the second aspect, the ninth aspect is the third aspect, the tenth aspect is the fourth aspect, the eleventh aspect is the fifth aspect, and the twelfth aspect is the sixth aspect. It is possible to provide a construction machine tank support structure that exhibits the same operational effects.

燃料タンク支持構造を示す要部の一部切欠き側面図（実施形態１）Partially cutaway side view of the main part showing the fuel tank support structure (Embodiment 1) 燃料タンク支持構造の非締付時の状態を示す一部切欠き側面図Partially cutaway side view showing the state when the fuel tank support structure is not tightened タンク支持用の緩衝具の配置構造を示し、（ａ）は平面図、（ｂ）は側面図The arrangement structure of the buffer for supporting the tank is shown, (a) is a plan view, and (b) is a side view. 油圧ショベルの燃料タンク位置を示す模式図Schematic diagram showing the fuel tank position of a hydraulic excavator 第１弾性部を示し、（ａ）は平面図、（ｂ）は断面図The 1st elastic part is shown, (a) is a top view, (b) is a sectional view. 第２弾性部を示し、（ａ）は平面図、（ｂ）は断面図The 2nd elastic part is shown, (a) is a top view, (b) is a sectional view. 実施形態２による燃料タンク支持構造を示す要部の一部切欠き側面図The partially cutaway side view of the principal part which shows the fuel tank support structure by Embodiment 2 各弾性部の製法を示し、（ａ）は第１弾性部、（ｂ）は第２弾性部The manufacturing method of each elastic part is shown, (a) is the first elastic part, (b) is the second elastic part. 各弾性部の別構造を示し、（ａ）は第１弾性部、（ｂ）は第２弾性部The structure of each elastic part is shown, (a) is the first elastic part, (b) is the second elastic part. 燃料タンク支持構造の第１別実施形態を示し、（ａ）は要部の一部切欠き側面図、（ｂ）は（ａ）のＸ‐Ｘ線断面図The fuel tank support structure 1st another embodiment is shown, (a) is a partially cutaway side view of the principal part, (b) is a sectional view taken along line XX of (a). 燃料タンク支持構造のその他の別実施形態を示し、（ａ）は第２別実施形態の一部切欠き側面図、（ｂ）は第３別実施形態の一部切欠き側面図The other another embodiment of a fuel tank support structure is shown, (a) is a partially notched side view of 2nd another embodiment, (b) is a partially notched side view of 3rd another embodiment.

以下に、本発明による緩衝具、及びそれを用いた建機用タンク支持構造の実施の形態を、図面を参照しながら説明する。なお、油圧ショベルや運搬機、ブルドーザなどの建機における機体は「車体」と表現する場合もある。   Embodiments of a shock absorber according to the present invention and a tank support structure for a construction machine using the same will be described below with reference to the drawings. A machine body in a construction machine such as a hydraulic excavator, a transporter, or a bulldozer may be expressed as a “vehicle body”.

〔実施形態１〕
図１，図３に、建機用タンク支持構造（以下、「タンク支持構造」と略称する）並びにそれに用いられる緩衝具Ａが示されている。このタンク支持構造は、例えば、図４に示すように、油圧作業装置１、クローラ走行装置２、機体である旋回台３、運転キャビン４、旋回台３上に構成される原動部５などを有する油圧ショベル（建機の一例）Ｋにおいて、原動部５に装備される燃料タンク（流体タンクの一例）６を支える構造が挙げられる。
燃料タンク６は、図３に示すように、各支持フレーム８，８に３箇所で計６箇所のタンク支持構造（緩衝具Ａ）により、弾性支持状態で旋回台３に搭載支持されている。 Embodiment 1
1 and 3 show a construction machine tank support structure (hereinafter abbreviated as “tank support structure”) and a shock absorber A used therefor. For example, as shown in FIG. 4, the tank support structure includes a hydraulic working device 1, a crawler traveling device 2, a swivel base 3 that is an airframe, an operation cabin 4, a driving unit 5 that is configured on the swivel stand 3, and the like. In the hydraulic excavator (an example of a construction machine) K, a structure for supporting a fuel tank (an example of a fluid tank) 6 provided in the prime mover 5 is exemplified.
As shown in FIG. 3, the fuel tank 6 is mounted and supported on the swivel base 3 in an elastically supported state by a total of six tank support structures (buffers A) at three positions on each of the support frames 8 and 8.

タンク支持構造は、図１，３において、以下のとおりに構成されている。燃料タンク６を支持すべく旋回台３に固定される支持フレーム（機体側支持部の一例）８と、燃料タンク６の下面６ａに固定される下向き凸状のタンクステー（被支持部の一例）７との上下間に第２弾性部９が介装されている。
支持フレーム８に形成される上下向きの支持孔８ｃ（支持孔ｈ）に、タンクステー７に上端１０ａが当接する状態のボス（筒状部の一例）１０を挿通配備し、ボス１０の下端１０ｂに当接する状態のフランジ１１と、支持フレーム８との上下間に第１弾性部１２が介装されている。なお、ボス１０は、例えば金属製で円筒状の部材である。 1 and 3, the tank support structure is configured as follows. A support frame (an example of a body-side support part) 8 fixed to the swivel base 3 to support the fuel tank 6 and a downward convex tank stay (an example of a supported part) fixed to the lower surface 6a of the fuel tank 6 A second elastic portion 9 is interposed between the upper and lower portions of the second elastic portion 9.
A boss (an example of a cylindrical portion) 10 in a state where the upper end 10a is in contact with the tank stay 7 is inserted into a vertical support hole 8c (support hole h) formed in the support frame 8, and the lower end 10b of the boss 10 is disposed. A first elastic portion 12 is interposed between the upper and lower sides of the flange 11 in contact with the support frame 8. The boss 10 is a cylindrical member made of metal, for example.

ボス１０に挿通される状態で装備されるボルト手段１３により、フランジ１１とタンクステー７とがボス１０を介して一体化される組付状態が形成可能に構成されている。ボルト手段１３は、ボルト１３Ａとナット１３Ｂとワッシャ１３Ｃを備えて構成される。
第２弾性部９は、リング状の弾性部材１４とリング状の硬質板１５との一体化によって構成されており、第１弾性部１２は、リング状の弾性部材１４とリング状の硬質板１５と前記フランジ１１との一体化によって構成されている。 The bolt means 13 provided in a state of being inserted into the boss 10 is configured so that an assembled state in which the flange 11 and the tank stay 7 are integrated via the boss 10 can be formed. The bolt means 13 includes a bolt 13A, a nut 13B, and a washer 13C.
The second elastic portion 9 is configured by integrating a ring-shaped elastic member 14 and a ring-shaped hard plate 15, and the first elastic portion 12 is formed of the ring-shaped elastic member 14 and the ring-shaped hard plate 15. And the flange 11 are integrated.

タンクステー７は、例えば、鋼板プレス製であって、燃料タンク６の下面６ａに溶着される一対の取付部７ａ，７ａ、傾斜した脚である一対の脚部７ｂ、７ｂ、各脚部７ｂ，７ｂに跨る水平な載せ部７ｃとを備えている。載せ部７ｃには、ボルト１３Ａを通すための孔７ｄが形成されている。
支持フレーム８は、例えば、左右一対の縦壁部８ａ，８ａと、水平な横壁部８ｂとを備えて断面が下向きコ字形状の鋼板製チャンネル材で構成されている。横壁部８ｂには、ボス１０を密内嵌させる円形の支持孔８ｃが形成されている。 The tank stay 7 is made of, for example, a steel plate press, and has a pair of attachment portions 7a and 7a welded to the lower surface 6a of the fuel tank 6, a pair of leg portions 7b and 7b that are inclined legs, and each leg portion 7b, And a horizontal mounting portion 7c straddling 7b. The mounting portion 7c is formed with a hole 7d for allowing the bolt 13A to pass therethrough.
The support frame 8 includes, for example, a steel plate channel material having a pair of left and right vertical wall portions 8a and 8a and a horizontal horizontal wall portion 8b and having a U-shaped cross section. A circular support hole 8c for tightly fitting the boss 10 is formed in the lateral wall portion 8b.

第２弾性部９は、図１，図６に示すように、ゴム製で扁平な円筒状の弾性部材１４と、鋼板製で円形リング状の硬質板１５とを有して構成されている。そして、図８（ｂ）に示すように、弾性部材１４と硬質板１５とは、弾性部材１４の加硫による加硫接着により一体化されている。
弾性部材１４の内径は、ボス１０の外径よりも少し大きい目の値に設定されており、その内径に硬質板１５の内径を合致させてある。また、硬質板１５の外径は、弾性部材１４の外径よりも大きい目の値とされている。
なお、第２弾性部９における弾性部材１４及び硬質板１５は、後述する第１弾性部１２の弾性部材１４及び硬質板１５とそれぞれ互いに同一のものを使用しているが、互いに異なるものであっても良い。 As shown in FIGS. 1 and 6, the second elastic portion 9 includes a flat cylindrical elastic member 14 made of rubber and a hard plate 15 made of a steel plate and having a circular ring shape. As shown in FIG. 8B, the elastic member 14 and the hard plate 15 are integrated by vulcanization adhesion by vulcanization of the elastic member 14.
The inner diameter of the elastic member 14 is set to a value slightly larger than the outer diameter of the boss 10, and the inner diameter of the hard plate 15 is matched with the inner diameter. Further, the outer diameter of the hard plate 15 is set to an eye value larger than the outer diameter of the elastic member 14.
The elastic member 14 and the hard plate 15 in the second elastic portion 9 are the same as the elastic member 14 and the hard plate 15 of the first elastic portion 12 described later, but are different from each other. May be.

第１弾性部１２は、図１，図５に示すように、ゴム製で扁平な円筒状の弾性部材１４と、鋼板製で円形リング状の硬質板１５と、厚肉の鋼板製で円形リング状の硬質板であるフランジ１１とを有して構成されている。そして、図８（ａ）に示すように、硬質板１５と弾性部材１４とフランジ１１との三者は、弾性部材１４の加硫による加硫接着により一体化されている。
弾性部材１４の内径は、ボス１０の外径よりも少し大きい目の値に設定されており、その内径に硬質板１５の内径を合致させてある。フランジ１１の内径は、ボス１０の外径より明確に小さく、かつ、ボルト１３Ａの軸部分の外径より少し大きい値に設定されている。硬質板１５の外径は、弾性部材１４の外径よりも大きく、かつ、フランジ１１の外径と同等となる値に設定されている。
実施形態１においては、第１弾性部１２と第２弾性部９との２部品により緩衝具Ａが構成されている。 As shown in FIGS. 1 and 5, the first elastic portion 12 includes a rubber-made flat cylindrical elastic member 14, a hard plate 15 made of a steel plate and a circular ring, and a circular ring made of a thick steel plate. And a flange 11 that is a hard plate. As shown in FIG. 8A, the three members of the hard plate 15, the elastic member 14, and the flange 11 are integrated by vulcanization adhesion by vulcanization of the elastic member 14.
The inner diameter of the elastic member 14 is set to a value slightly larger than the outer diameter of the boss 10, and the inner diameter of the hard plate 15 is matched with the inner diameter. The inner diameter of the flange 11 is set to a value that is clearly smaller than the outer diameter of the boss 10 and slightly larger than the outer diameter of the shaft portion of the bolt 13A. The outer diameter of the hard plate 15 is set to a value that is larger than the outer diameter of the elastic member 14 and equal to the outer diameter of the flange 11.
In the first embodiment, the shock absorber A is composed of two parts, the first elastic part 12 and the second elastic part 9.

ボス１０は、支持フレーム８の支持孔８ｃに挿通された状態で、第１弾性部１２のフランジ１１とタンクステー７の載せ部７ｃとの上下間に配備されている。そして、フランジ１１の孔１１ａ、第１弾性部１２、ボス１０、第２弾性部９、及び載せ部７ｃの孔７ｄを通るボルト手段１３により、タンク支持構造は、図１に示すように、軸心Ｐを有する状態で締付固定される。   The boss 10 is disposed between the flange 11 of the first elastic portion 12 and the mounting portion 7 c of the tank stay 7 while being inserted into the support hole 8 c of the support frame 8. Then, the tank support structure has a shaft as shown in FIG. 1 by bolt means 13 passing through the hole 11a of the flange 11, the first elastic portion 12, the boss 10, the second elastic portion 9, and the hole 7d of the mounting portion 7c. It is tightened and fixed with the center P.

実施形態１によるタンク支持構造では、ボス１０の長さは、第１弾性部１２からフランジ１１の厚みを引いた厚みと、第２弾性部９の厚みと、横壁部８ｂの厚みとを足した値より若干短い長さに設定されている。従って、ナット１３Ｂを、圧力を掛けずごく軽く締めただけの自由状態においては、図２に示すように、フランジ１１に載せ付けられたボス１０と載せ部７ｃとの上下間には寸法αの間隙が形成される状態に設定されている。   In the tank support structure according to the first embodiment, the length of the boss 10 is obtained by adding the thickness obtained by subtracting the thickness of the flange 11 from the first elastic portion 12, the thickness of the second elastic portion 9, and the thickness of the lateral wall portion 8b. The length is set slightly shorter than the value. Therefore, in a free state in which the nut 13B is only lightly tightened without applying pressure, as shown in FIG. 2, there is a dimension α between the boss 10 mounted on the flange 11 and the mounting portion 7c. The gap is set to be formed.

そして、図２に示す自由状態から、ボルト１３Ａとナット１３Ｂとを締込み方向に相対回動してボルト手段１３を強制螺合操作すると、図１に示すように、第１及び第２弾性部１２，９を軸心Ｐ方向での厚みが減じるように若干圧縮することでボス１０が載せ部７ｃに当接（圧接）された組付状態になる。この組付状態では、ボルト手段１３、フランジ１１、及びボス１０はタンクステー７に相対的に固定（一体化）されている。つまり、緩衝具Ａは、タンク支持構造の組付状態においては、前記間隙の寸法である所定量αでもって予圧縮されるようにその厚みが設定されている。実施形態１においては、各弾性部１４の圧縮量はα／２に設定される。   Then, from the free state shown in FIG. 2, when the bolt means 13 is forcibly screwed by relatively rotating the bolt 13A and the nut 13B in the tightening direction, the first and second elastic portions as shown in FIG. 12 and 9 are slightly compressed so as to reduce the thickness in the direction of the axis P, so that the boss 10 is brought into contact (pressure contact) with the mounting portion 7c. In this assembled state, the bolt means 13, the flange 11, and the boss 10 are relatively fixed (integrated) to the tank stay 7. That is, the thickness of the shock absorber A is set so that in the assembled state of the tank support structure, the buffer A is pre-compressed with the predetermined amount α which is the dimension of the gap. In the first embodiment, the compression amount of each elastic portion 14 is set to α / 2.

このタンク支持構造においては、燃料タンク６などの重量により、第２弾性部９を圧縮させる方向に作用させ、かつ、第１弾性部１２を軸心Ｐ方向で膨張する（引張る）方向に作用さして弾性支持させている。建機では、悪路の走行振動や、作業現場作業振動などによって旋回台３が上下左右に振動したり激しく往復移動したりすることがままある。そのような場合は、慣性（慣性モーメント）により燃料タンク６を持ち上げようとする方向の力が作用するので、第１弾性部１２を圧縮させる方向に作用させ、かつ、第２弾性部９を軸心Ｐ方向で膨張する（引張る）方向に作用さして弾性支持させる状態になる。   In this tank support structure, the weight of the fuel tank 6 or the like causes the second elastic portion 9 to act in the direction of compressing, and the first elastic portion 12 acts in the direction of expanding (pulling) in the axis P direction. It is elastically supported. In a construction machine, the swivel base 3 may vibrate up and down, left and right or vigorously reciprocate due to traveling vibration on a rough road, work site work vibration, or the like. In such a case, a force in a direction to lift the fuel tank 6 acts due to inertia (moment of inertia), so that the first elastic portion 12 acts in a compressing direction and the second elastic portion 9 is pivoted. It is in a state where it is elastically supported by acting in the direction of expansion (pulling) in the direction of the heart P.

また、図１に示す組付状態において、上述のように上下方向の力が作用して各弾性部１２，９が圧縮された場合は、弾性部材１４は径内外に膨張変形する。従って、図２に示す自由状態においては、その膨張分を見込んで弾性部材１４の内径をボス１０の外径より幾分大きくしておくのが望ましい。   In the assembled state shown in FIG. 1, when the elastic portions 12 and 9 are compressed by the vertical force acting as described above, the elastic member 14 expands and deforms in and out of the diameter. Therefore, in the free state shown in FIG. 2, it is desirable to make the inner diameter of the elastic member 14 somewhat larger than the outer diameter of the boss 10 in view of the expansion.

ところで、第１弾性部１２は、図９（ａ）に示すように、硬質板１５の内径を、筒状部１０に隙間なく又は少なく外嵌される程度に小径化した嵌合部分１５ａを有する構造のものでも良い。このような構成とすれば、組付け時において筒状部１０と第１弾性部１２とを互いに同心状又はほぼ同心状に設置させることが可能になる。   By the way, as shown in FIG. 9A, the first elastic portion 12 has a fitting portion 15a in which the inner diameter of the hard plate 15 is reduced so that the inner diameter of the hard plate 15 is fitted to the cylindrical portion 10 with little or no gap. A structure may be used. With such a configuration, it is possible to install the cylindrical portion 10 and the first elastic portion 12 concentrically or substantially concentrically at the time of assembly.

また、第２弾性部９は、図９（ｂ）に示すように、弾性部材１４の内径を、筒状部１０に隙間なく又は少なく外嵌される程度に、端部など部分的に小径化した嵌合部分１４ａを有する構成としても良い。このような構成とすれば、組付け時において筒状部１０と第２弾性部９とを互いに同心状又はほぼ同心状に設置させることが可能になる。   Further, as shown in FIG. 9B, the second elastic portion 9 is partially reduced in diameter, such as an end portion, so that the inner diameter of the elastic member 14 is fitted to the cylindrical portion 10 with little or no gap. It is good also as a structure which has the fitted part 14a. With such a configuration, the cylindrical portion 10 and the second elastic portion 9 can be installed concentrically or substantially concentrically at the time of assembly.

なお、図示は省略するが、第１弾性部１２を、その弾性部材１４の上下中間においてその内径を小径化した嵌合部分１４ａ〔図９（ｂ）を参照〕を有する構造のものとすることや、第２弾性部９を、嵌合部分１５ａ〔図９（ａ）を参照〕を有する硬質板１５を備える構造のものとすることも可能である。なお、第１弾性部１２及び／又は第２弾性部９の弾性部材１４を、一般的なゴムに代えて高減衰ゴムで形成すれば、より衝撃吸収性に優れる高性能なものとすることができる。   Although not shown, the first elastic portion 12 has a structure having a fitting portion 14a (see FIG. 9B) whose inner diameter is reduced in the middle between the upper and lower portions of the elastic member 14. Alternatively, the second elastic portion 9 may have a structure including a hard plate 15 having a fitting portion 15a (see FIG. 9A). If the elastic member 14 of the first elastic portion 12 and / or the second elastic portion 9 is formed of a high-attenuation rubber instead of a general rubber, it may have a high performance that is more excellent in shock absorption. it can.

実施形態１による緩衝具Ａ及びこれを用いたタンク支持構造では、燃料タンク６の荷重を支える第１弾性部１２だけでなく、燃料タンク６が上方移動しようとする力に対して作用する第２弾性部９も設けてあるので、通常の移動走行や作業時における燃料タンク６の防振支持及び緩衝支持が行えるとともに、凹凸や起伏の激しい悪路での移動走行や、激しい機体の上下移動や振動を伴うハードな作業時における燃料タンク６の上方への慣性移動や衝撃移動に対しても防振並びに緩衝作用することができる。   In the shock absorber A and the tank support structure using the same according to the first embodiment, not only the first elastic portion 12 that supports the load of the fuel tank 6 but also the second acting on the force that the fuel tank 6 tries to move upward. Since the elastic portion 9 is also provided, it is possible to perform vibration-proof support and shock-absorbing support of the fuel tank 6 during normal travel and work, and travel on rough roads with severe irregularities and undulations, Anti-vibration and shock-absorbing effects can be provided against inertial movement and impact movement upward of the fuel tank 6 during hard work involving vibration.

各弾性部１２，９は、ゴムなどによる弾性部材１４と金属板などによる硬質板１５との一体化によって構成されているので、弾性部材１４のみで構成される場合に比べて、強く圧縮された場合の弾性変形が硬質板１５により抑制され、弾性部材１４の持つばね定数（ゴム硬度）の割りには高荷重に耐えることができるとか、耐久性が向上するといった利点を得ることが可能になる。
また、仕様変更などにより、燃料タンク６の防振、緩衝機能を変えることなくタンクステー７と支持フレーム８との上下間寸法が変更をされるような場合には、硬質板１５の厚さ変更によって弾性部材１４の厚さをそのままとする、という合理的な対策を採ることが可能であり、設計に融通が効く利点もある。 Since each elastic part 12 and 9 is comprised by integration of the elastic member 14 by rubber | gum etc., and the hard board 15 by metal plate etc., compared with the case where it comprises only the elastic member 14, it was compressed more strongly. In this case, the elastic deformation is suppressed by the hard plate 15, and it is possible to obtain advantages such as being able to withstand a high load or improving durability for the spring constant (rubber hardness) of the elastic member 14. .
In addition, when the vertical dimension between the tank stay 7 and the support frame 8 is changed without changing the vibration isolation and shock absorbing function of the fuel tank 6 due to specification changes, etc., the thickness of the hard plate 15 is changed. Therefore, it is possible to take a reasonable measure of keeping the thickness of the elastic member 14 as it is, and there is an advantage that the design is flexible.

また、第１及び第２弾性部１２，９は上下に予圧縮された状態で組付けられるので、ボルト手段１３の経時緩みが解消又は抑制されてガタつきなく装着できたり、重い燃料タンクを安定的に支持できるだけでなく、次のような利点がある。例えば、想定荷重が２０ｋＮの場合、ばね定数設定は２５ｋＮ／ｍｍとし、弾性部材１４の組付状態での予備圧縮量を１ｍｍとすることで、２０ｋＮ負荷時変位２０ｋＮ÷２５ｋＮ／ｍｍ＝０．８ｍｍとなり、予備圧縮量１ｍｍを下回るので、この点からも緩みの無い状態を維持し続けることが可能になる。   In addition, since the first and second elastic portions 12 and 9 are assembled in a pre-compressed state, the loosening of the bolt means 13 is eliminated or suppressed, so that it can be mounted without rattling or a heavy fuel tank can be stabilized. In addition to supporting it, it has the following advantages. For example, when the assumed load is 20 kN, the spring constant setting is 25 kN / mm, and the precompression amount in the assembled state of the elastic member 14 is 1 mm, so that the displacement at 20 kN load 20 kN ÷ 25 kN / mm = 0.8 mm. Thus, since the pre-compression amount is less than 1 mm, it is possible to continue to maintain a loose state from this point.

〔実施形態２〕
実施形態２によるタンク支持構造及び緩衝具Ａは、図７に示すように、ボス部（筒状部の一例）１０の外周面１０Ａ、及び横壁部８ｂの内周面、即ち支持孔８ｃの双方に、ボス部１０と支持フレーム８との滑りを促進させるべく低摩擦処理を施こしてなる低摩擦手段Ｂが装備されたものでも良い。つまり、第１及び第２弾性部１２，９に加えて、円形をなす支持孔８ｃに内嵌する円筒状の筒状部１０を有するとともに、筒状部１０の外周面１０Ａには、支持フレーム８との滑りを促進させる低摩擦手段Ｂが装備されているのである。
実施形態１の緩衝具Ａが、第１弾性部１２と第２弾性部９との２部品で構成されているに対して、実施形態２の緩衝具Ａは、第１弾性部１２と第２弾性部９と低摩擦手段Ｂが施された筒状部１０との３部品で構成されている。なお、実施形態１の緩衝具Ａを、第１弾性部１２と第２弾性部９とボス１０との３部品で構成するものとしても良い。 [Embodiment 2]
As shown in FIG. 7, the tank support structure and the shock absorber A according to the second embodiment have both an outer peripheral surface 10A of a boss portion (an example of a cylindrical portion) 10 and an inner peripheral surface of the lateral wall portion 8b, that is, a support hole 8c. Further, a low-friction means B that is subjected to a low-friction process to promote the sliding between the boss portion 10 and the support frame 8 may be provided. That is, in addition to the first and second elastic portions 12 and 9, a cylindrical tubular portion 10 that fits in a circular support hole 8 c is provided, and a support frame is provided on the outer peripheral surface 10 A of the tubular portion 10. 8 is equipped with low-friction means B that promotes sliding with 8.
The shock absorber A according to the first embodiment is composed of two parts, the first elastic portion 12 and the second elastic portion 9, whereas the shock absorber A according to the second embodiment has the first elastic portion 12 and the second elastic portion 12. It consists of three parts, an elastic part 9 and a cylindrical part 10 provided with low friction means B. The shock absorber A according to the first embodiment may be configured by three parts including the first elastic part 12, the second elastic part 9, and the boss 10.

低摩擦手段Ｂは、例えば、フッ素樹脂のコーティングを外周面１０Ａに行うことが挙げられる。この低摩擦手段Ｂにより、タンク支持構造に横方向の力が作用した場合や、燃料タンク６と支持フレーム８とが相対的に回動する動きが作用した場合において、ボス部１０と支持フレーム８との接触による摩擦抵抗が軽減され、燃料タンクの緩衝性能や防振性能が向上する利点が得られる。なお、低摩擦手段Ｂを支持孔８ｃに施しても良い。   As the low friction means B, for example, the outer peripheral surface 10A may be coated with a fluororesin. When the lateral friction force acts on the tank support structure or when the fuel tank 6 and the support frame 8 move relatively, the low friction means B causes the boss portion 10 and the support frame 8 to move. The frictional resistance due to contact with the fuel tank is reduced, and the fuel tank cushioning performance and vibration proof performance are improved. The low friction means B may be applied to the support hole 8c.

低摩擦手段Ｂの採用により、ボス１０と支持フレーム８との相対的な上下の動きがスムーズになり、より緩衝具Ａへ荷重負担させることができるようになる。
また、ボス１０と支持フレーム８とは水平方向には殆ど動かないので、燃料タンク６が上下軸心に関して支持フレーム８に対して回転（回動）する方向の挙動を極力抑えることができ、従って、その挙動による支持フレーム８への過負荷を抑制させることが可能になる。 By adopting the low friction means B, the relative vertical movement between the boss 10 and the support frame 8 becomes smooth, and the load can be more borne on the shock absorber A.
Further, since the boss 10 and the support frame 8 hardly move in the horizontal direction, the behavior in the direction in which the fuel tank 6 rotates (rotates) with respect to the support frame 8 with respect to the vertical axis can be suppressed as much as possible. The overload on the support frame 8 due to the behavior can be suppressed.

〔第１別実施形態〕
緩衝具Ａ及びそれを用いたタンク支持構造は、図１０（ａ）に示すように、図１に示す実施形態１のもの及び構造において、上側の第２弾性部９を第１弾性部１２に置き換えた構成としても良い。即ち、下側の第１弾性部１２の上下をひっくり返した姿勢で被支持部７と支持部８との上下間に介装されており、筒状部１０は、上下のフランジ１１，１１の上下間で挟持される構造となっている。 [First Embodiment]
As shown in FIG. 10A, the shock absorber A and the tank support structure using the same are the same as those of the first embodiment shown in FIG. A replacement configuration may be used. That is, the lower first elastic portion 12 is interposed between the supported portion 7 and the support portion 8 in an upside down position, and the cylindrical portion 10 is formed by the upper and lower flanges 11, 11. The structure is sandwiched between the upper and lower sides.

この場合、二個使いとなる第１弾性部１２，１２を、図１０（ｂ）に示すように、平面視で矩形をなす形状のものとしても良い。例えば、弾性部材１４を、支持フレーム８の長手方向に沿う方向の幅ｄ１よりも、支持フレーム８の左右方向に沿う方向の幅ｄ２を長くする形状に形成することが挙げられるが、この限りでなくても良い。   In this case, the first elastic portions 12 and 12 that are used twice may have a rectangular shape in plan view as shown in FIG. For example, the elastic member 14 may be formed in a shape in which the width d2 in the direction along the left-right direction of the support frame 8 is longer than the width d1 in the direction along the longitudinal direction of the support frame 8. It is not necessary.

〔第２別実施形態〕
緩衝具Ａ及びそれを用いたタンク支持構造を、図１１（ａ）に示すように、図１に示すものにおいて、フランジ１１を筒状部１０に一体化させた構成のものとすることも可能である。即ち、図１１（ａ）に示すように、図１に示すものにおける第１弾性部１２を第２弾性部９に代えるとともに、ボス１０を、フランジ１１と同等の形状・大きさ・機能を備えたフランジ部１０ｆと、筒状の本体部１０ｈとを一体に備えたフランジ付ボス（筒状部の一例）１０に代えた構成の緩衝具Ａ及びそれを用いたタンク支持構造である。 [Second Embodiment]
As shown in FIG. 11A, the shock absorber A and the tank support structure using the shock absorber A may have a configuration in which the flange 11 is integrated with the cylindrical portion 10 in the structure shown in FIG. It is. That is, as shown in FIG. 11 (a), the first elastic part 12 shown in FIG. 1 is replaced with the second elastic part 9, and the boss 10 has the same shape, size and function as the flange 11. This is a shock absorber A having a configuration replaced with a flanged boss (an example of a cylindrical portion) 10 integrally including a flange portion 10f and a cylindrical main body portion 10h, and a tank support structure using the same.

この第２別実施形態による緩衝具Ａは、２個の第２弾性部９でなるものでも良いし、２個の第２弾性部９とフランジ付ボス（筒状部の一例）１０との３部品でなるものでも良い。さらに、図１１（ａ）に示すものにおいて、支持フレーム８の下側に位置する第２弾性部９の弾性部材１４が、加硫接着やその他の手段によりフランジ部１０ｆに一体化される構成を採る緩衝具Ａ、或いはそれを用いたタンク支持構造とすることも可能である。   The shock absorber A according to the second alternative embodiment may be composed of two second elastic parts 9, or three of two second elastic parts 9 and a flanged boss (an example of a cylindrical part) 10. It may be a component. Further, in the structure shown in FIG. 11 (a), the elastic member 14 of the second elastic portion 9 located on the lower side of the support frame 8 is integrated with the flange portion 10f by vulcanization adhesion or other means. It is also possible to adopt a shock absorber A to be taken or a tank support structure using the same.

〔第３別実施形態〕
緩衝具Ａ及びそれを用いたタンク支持構造を、図１１（ｂ）に示すように、図１に示すものにおいて緩衝具Ａを上下に反転させて配置したような構成を採るものも可能である。即ち、図１１（ｂ）において、支持フレーム８の上に第２弾性部９を配置し、その上にタンクステー７を配置し、その上に第１弾性部１２を配置するとともに、支持フレーム８とフランジ１１との上下間に筒状部１０を設ける構造のタンク支持構造である。この場合は、タンクステー７の孔７ｄが「支持孔ｈ」に相当する。 [Third Embodiment]
As shown in FIG. 11 (b), the shock absorber A and the tank support structure using the shock absorber A may be configured such that the shock absorber A is arranged upside down in the structure shown in FIG. . That is, in FIG. 11B, the second elastic portion 9 is disposed on the support frame 8, the tank stay 7 is disposed thereon, the first elastic portion 12 is disposed thereon, and the support frame 8 is disposed. This is a tank support structure in which a cylindrical portion 10 is provided between the top and bottom of the flange 11. In this case, the hole 7d of the tank stay 7 corresponds to the “support hole h”.

第１及び第２弾性部１２，９は、共に硬質板１５が弾性部材１４の下となる姿勢で配置されているが、第２弾性部９は、硬質板１５が弾性部材１４の上となる姿勢でも良い。この場合、燃料タンク６の荷重は第２弾性部９が受け持ち、建機の凹凸や起伏走行、或いは作業振動などによる上方へ荷重は第１弾性部１２が受け持つ構造となる。従って、この第３別実施形態においては、タンクステー（被支持部）７が「何れか一方」に相当し、支持フレーム（支持部）８が「何れか他方」に相当する。   The first and second elastic portions 12 and 9 are both arranged in such a posture that the hard plate 15 is below the elastic member 14, but the second elastic portion 9 is such that the hard plate 15 is above the elastic member 14. The posture may be good. In this case, the load of the fuel tank 6 is handled by the second elastic part 9, and the load by the first elastic part 12 is handled upward by the unevenness of the construction machine, running up and down, or work vibration. Accordingly, in this third alternative embodiment, the tank stay (supported portion) 7 corresponds to “any one” and the support frame (support portion) 8 corresponds to “any other”.

６ 流体タンク
７ 被支持部（何れか他方）
８ 支持部（何れか一方）
８ｃ 支持孔
９ 第２弾性部
１０ 筒状部
１０Ａ 外周面
１１ フランジ
１２ 第１弾性部
１３ ボルト手段
１４ 弾性部材
１５ 硬質板
Ｂ 低摩擦手段 6 Fluid tank 7 Supported part (any other)
8 Support part (either one)
8c Support hole 9 Second elastic part 10 Tubular part 10A Outer peripheral surface 11 Flange 12 First elastic part 13 Bolt means 14 Elastic member 15 Hard plate B Low friction means

Claims (12)

流体タンクに固定される被支持部と前記流体タンクを支持するための機体側の支持部との何れか一方と、
前記何れか一方に形成される支持孔に相対移動可能に挿通される筒状部を介して前記被支持部と前記支持部との何れか他方に固定されるフランジとの上下間に、前記筒状部を外囲する状態で配備される第１弾性部と、
前記何れか他方と前記何れか一方との上下間に、前記筒状部を外囲する状態で配備される第２弾性部とを有し、
前記第１弾性部及び前記第２弾性部は、弾性部材と硬質板との一体化によって構成され、
前記第１弾性部及び前記第２弾性部それぞれの内径が、前記筒状部の外径よりも幾分大きくなるように設定されている緩衝具。
Any one of a supported part fixed to the fluid tank and a support part on the airframe side for supporting the fluid tank;
Between the upper and lower sides of the supported portion and a flange fixed to the other of the support portions via a cylindrical portion that is inserted in a support hole formed in either one of the support holes so as to be relatively movable. A first elastic part deployed in a state surrounding the shape part;
A second elastic portion arranged in a state surrounding the cylindrical portion between the upper and lower sides of either one and the other;
The first elastic portion and the second elastic portion are configured by integrating an elastic member and a hard plate ,
A shock absorber in which the inner diameter of each of the first elastic part and the second elastic part is set to be somewhat larger than the outer diameter of the cylindrical part .
前記第１及び第２弾性部に加えて、円形をなす前記支持孔に内嵌する円筒状の前記筒状部を有するとともに、
前記筒状部の外周面には、前記何れか一方との滑りを促進させる低摩擦手段が装備されている請求項１に記載の緩衝具。 In addition to the first and second elastic portions, the cylindrical tubular portion is fitted into the circular support hole.
2. The shock absorber according to claim 1, wherein a low-friction means that promotes sliding with any one of the cylindrical portions is provided on the outer peripheral surface of the cylindrical portion. 前記第１弾性部と前記第２弾性部とが互いに同一のものに構成されている請求項１又は２に記載の緩衝具。   The shock absorber according to claim 1 or 2, wherein the first elastic portion and the second elastic portion are configured to be the same. 前記第１弾性部の前記弾性部材における前記硬質板を装備していない側の端面に、前記フランジが一体的に装備されている請求項１又は２に記載の緩衝具。   The shock absorber according to claim 1 or 2, wherein the flange is integrally provided on an end surface of the elastic member of the first elastic portion on a side not provided with the hard plate. 前記フランジと前記筒状部とが当接し、かつ、前記筒状部と前記何れか他方とが当接する状態でこれら三者が相対固定される組付状態においては、前記第１及び第２弾性部の厚みが所定量減じられる予圧縮状態となるように構成されている請求項１〜４の何れか一項に記載の緩衝具。   In the assembled state in which the flange and the tubular portion are in contact with each other, and the three portions are relatively fixed in a state in which the tubular portion is in contact with the other, the first and second elasticities The shock absorber according to any one of claims 1 to 4, wherein the shock absorber is configured to be in a pre-compressed state in which the thickness of the portion is reduced by a predetermined amount. 前記弾性部材が高減衰ゴムにより形成されている請求項１〜５の何れか一項に記載の緩衝具。   The shock absorber according to any one of claims 1 to 5, wherein the elastic member is formed of a high damping rubber. 流体タンクに固定される被支持部と前記流体タンクを支持する機体側の支持部との何れか一方と、前記被支持部と前記支持部との何れか他方との上下間に第２弾性部を介装し、
前記何れか一方に形成される支持孔に、前記何れか他方に上端が当接する状態の筒状部を相対移動可能に挿通配備し、
前記筒状部の下端に当接する状態のフランジ又は前記筒状部の下端に一体形成される状態のフランジと、前記何れか一方との上下間に第１弾性部を介装し、
前記筒状部に挿通される状態で装備されるボルト手段により、前記フランジと前記何れか他方とが前記筒状部を介して一体化される組付状態が形成可能に構成されるとともに、
前記第１弾性部及び前記第２弾性部は、前記筒状部を外囲する状態の弾性部材と前記筒状部を外囲する状態の硬質板との一体化によって構成され、
前記第１弾性部及び前記第２弾性部それぞれの内径が、前記筒状部の外径よりも幾分大きくなるように設定されている建機用タンク支持構造。
A second elastic portion between one of the supported portion fixed to the fluid tank and the support portion on the airframe side that supports the fluid tank, and the other of the supported portion and the supporting portion. Intervening,
In the support hole formed in any one of the above, the cylindrical portion in a state where the upper end is in contact with any one of the other is inserted and arranged so as to be relatively movable,
A flange in a state of being in contact with a lower end of the cylindrical part or a flange in a state of being integrally formed with a lower end of the cylindrical part, and a first elastic part interposed between the upper and lower sides of either one of the above,
The bolt means equipped in a state of being inserted through the cylindrical portion is configured to form an assembled state in which the flange and the other one are integrated via the cylindrical portion,
The first elastic portion and the second elastic portion are configured by integrating an elastic member in a state of surrounding the cylindrical portion and a hard plate in a state of surrounding the cylindrical portion ,
A construction machine tank support structure in which an inner diameter of each of the first elastic part and the second elastic part is set to be somewhat larger than an outer diameter of the cylindrical part .
円筒状の前記筒状部の外周面及び／又は円形をなす前記支持孔を形成する前記一方の内周面に、前記筒状部と前記何れか一方との滑りを促進させる低摩擦手段が装備されている請求項７に記載の建機用タンク支持構造。   Equipped with low friction means for promoting slippage between the cylindrical portion and either one of the cylindrical outer peripheral surface and / or the one inner peripheral surface forming the circular support hole. The construction machine tank support structure according to claim 7. 前記第１弾性部と前記第２弾性部とが互いに同一のものに構成されている請求項７又は８に記載の建機用タンク支持構造。   The construction machine tank support structure according to claim 7 or 8, wherein the first elastic part and the second elastic part are configured to be identical to each other. 前記筒状部の下端に当接する状態のフランジを備えるとともに、前記フランジは、前記第１弾性部の前記弾性部材における前記硬質板を装備していない側の端面に一体的に装備されている請求項７又は８に記載の建機用タンク支持構造。   A flange that is in contact with the lower end of the cylindrical portion is provided, and the flange is integrally provided on an end surface of the first elastic portion on the side not provided with the hard plate. Item 9. The construction machine tank support structure according to Item 7 or 8. 前記第１及び第２弾性部の厚みは、共に自由状態における厚みよりも前記組付状態における厚みの方が所定量少ない値となる状態に設定されている請求項７〜１０の何れか一項に記載の建機用タンク支持構造。   11. The thickness of each of the first and second elastic portions is set to a state in which the thickness in the assembled state is a predetermined amount less than the thickness in the free state. The tank support structure for construction machinery described in 1. 前記弾性部材が高減衰ゴムにより形成されている請求項７〜１１の何れか一項に記載の建機用タンク支持構造。   The construction machine tank support structure according to any one of claims 7 to 11, wherein the elastic member is formed of a high damping rubber.
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