JP7413965B2 - Joint structure of hydraulic piping of working machine and method of assembling hydraulic piping of working machine - Google Patents

Joint structure of hydraulic piping of working machine and method of assembling hydraulic piping of working machine Download PDF

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JP7413965B2
JP7413965B2 JP2020164788A JP2020164788A JP7413965B2 JP 7413965 B2 JP7413965 B2 JP 7413965B2 JP 2020164788 A JP2020164788 A JP 2020164788A JP 2020164788 A JP2020164788 A JP 2020164788A JP 7413965 B2 JP7413965 B2 JP 7413965B2
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克哉 蔵内
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Kobelco Construction Machinery Co Ltd
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Description

本発明は、油圧ショベルなどの作業機械の油圧配管の継手構造及び作業機械の油圧配管の組付方法に関する。 The present invention relates to a joint structure for hydraulic piping for a working machine such as a hydraulic excavator, and a method for assembling hydraulic piping for a working machine.

従来、例えば、特許文献１のように、アッパーフレームに設けられた配管フレーム内に二本の配管を並設する構成を前提として、回り止めすべきチューブの外周に回り止めプレートを溶接固定し、この回り止めプレートの先端部に設けた二股状の係合部を相手方チューブにこれを両側から挟みこむ状態で係合させることにより、ホース接続時にチューブに作用する回転力を相手方チューブで受け止めるように構成した作業機械の油圧配管の継手構造は知られている。 Conventionally, for example, as in Patent Document 1, a rotation prevention plate is welded and fixed to the outer periphery of a tube to be prevented from rotating, assuming a configuration in which two pipes are arranged side by side in a piping frame provided in an upper frame. By engaging the bifurcated engagement part provided at the tip of this anti-rotation plate with the mating tube in such a way that it is sandwiched from both sides, the mating tube can absorb the rotational force that acts on the tube when the hose is connected. The hydraulic piping joint structure of the constructed working machine is known.

また、特許文献２のように、基部と、この基部から異なる方向に突出する複数の突出部とを有し、少なくとも２つの突出部の突端面に、油流路を通じて互いに連通する接続口が形成され、少なくとも１つの突出部の突端面に、油流路と連通することなく、雌ネジ孔が形成されている作業機械に備えられた油圧ホースの継手が知られている。 Further, as in Patent Document 2, it has a base and a plurality of protrusions that protrude from the base in different directions, and connection ports that communicate with each other through an oil flow path are formed on the end surfaces of at least two of the protrusions. A hydraulic hose joint for a working machine is known in which a female threaded hole is formed in the tip end surface of at least one protrusion without communicating with the oil flow path.

特開２０１０－２８５８１６６号公報Japanese Patent Application Publication No. 2010-2858166 特開２０１３－５３４５３号公報Japanese Patent Application Publication No. 2013-53453

しかしながら、特許文献１のものでは、互いの配管同士を固定するものではないため、配管を上部フレームに組み付けて固定作業を行う際には、配管を支持しておく人と、配管をクランプ止めする人の二人作業となり、作業性がよくない。 However, in Patent Document 1, the pipes are not fixed to each other, so when the pipes are assembled to the upper frame and fixed work is carried out, the pipes must be clamped together with a person who supports the pipes. It is a two-person job, and the work efficiency is not good.

また、特許文献２のものでは、配管を、雌ネジ孔を用いて取付対象物に固定するので、配管毎に個別に取付を行わなければならず、隣接した油圧ホースの位置合わせや傾き調整が難しいという問題がある。 In addition, in Patent Document 2, the piping is fixed to the object to be attached using a female threaded hole, so each piping must be installed individually, and it is difficult to align and adjust the inclination of adjacent hydraulic hoses. The problem is that it is difficult.

本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、複数の金属製チューブをサブ組立し、作業機械に組み付けた後、油圧ホースを接続する際に金属製チューブと供回りしないようにして作業効率を向上させることにある。 The present invention has been made in view of the above points, and its purpose is to sub-assemble a plurality of metal tubes, assemble them into a working machine, and then connect the metal tubes to a hydraulic hose. The purpose is to improve work efficiency by avoiding duplicate rotation.

上記の目的を達成するために、この発明では、複数の金属製チューブを予め互いに回り止めして固定できる構造とした。 In order to achieve the above object, the present invention has a structure in which a plurality of metal tubes can be prevented from rotating and fixed to each other in advance.

具体的には、第１の発明では、作業機械における油圧機器同士を接続する、金属製チューブ及び可撓性を有する油圧ホースを含む並設された複数の配管を互いに固定する作業機械の油圧配管の継手構造であって、
上記金属製チューブには、内部に作動油が通る空洞の継手本体が回転一体に固定され、該金属製チューブの両端には、上記油圧ホースが接続可能に構成されており、
上記継手本体から上記金属製チューブの長手方向に対して交差する方向に延び、平坦な当接面を有する回り止め部が設けられ、
上記回り止め部には、上記当接面で互いに当接する他の回り止め部に挿通される締結部材を挿通する締結部材挿通孔が設けられ、
上記複数の金属製チューブに設けられた継手本体からそれぞれ延びる上記回り止め部の当接面を互いに当接させた状態で、上記締結部材挿通孔に上記締結部材が挿通されて締結されることで、上記金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めされている。 Specifically, the first invention provides hydraulic piping for a working machine that fixes to each other a plurality of pipes installed in parallel, including metal tubes and flexible hydraulic hoses, which connect hydraulic equipment in the working machine. A joint structure,
A hollow joint body through which hydraulic oil passes is rotatably fixed to the metal tube, and the hydraulic hose is connectable to both ends of the metal tube,
a detent portion extending from the joint body in a direction intersecting the longitudinal direction of the metal tube and having a flat contact surface;
The detent portion is provided with a fastening member insertion hole through which a fastening member that is inserted through another detent portion that abuts each other on the contact surface is inserted;
The fastening member is inserted into the fastening member insertion hole and fastened with the contact surfaces of the detent portions extending from the joint bodies provided on the plurality of metal tubes being in contact with each other. , is prevented from rotating in the circumferential direction about the longitudinal direction of the metal tube.

上記の構成によると、複数の金属製チューブは、回り止め部の当接面で互いに当接した状態で、締結部材で固定されて金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めされるので、位置決め及び角度調整された状態でサブ組立が可能である。位置決め及び角度調整された状態でサブ組立した複数の金属製チューブを作業機械に取り付ければよいので、一人で作業でき、また、油圧機器に接続する油圧ホースをその両端に接続する際にも、回り止め部で金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めされているので、油圧ホースと供回りしない。なお、締結部材挿通孔は貫通孔でも底のあるネジ穴でもよい。 According to the above configuration, the plurality of metal tubes are fixed by the fastening member while being in contact with each other at the contact surfaces of the rotation prevention parts to prevent rotation in the circumferential direction about the longitudinal direction of the metal tubes. Since it is prevented from rotating, sub-assembly is possible with the position and angle adjusted. By simply attaching multiple sub-assembled metal tubes to the working machine with their positions and angles adjusted, one person can work on the machine. Since the stop portion prevents rotation in the circumferential direction about the longitudinal direction of the metal tube, it does not rotate together with the hydraulic hose. Note that the fastening member insertion hole may be a through hole or a screw hole with a bottom.

第２の発明では、第１の発明において、
上記回り止め部は、上記当接面とは異なる第２当接面を有し、該第２当接面は、上記締結部材の延びる方向に沿う方向に延びている。 In the second invention, in the first invention,
The rotation stopper has a second abutting surface different from the abutting surface, and the second abutting surface extends in the direction in which the fastening member extends.

上記の構成によると、締結部材を締結して金属製チューブ間を接続するときに第２当接面同士が当接して回り止め部の回転を規制するので、金属製チューブ同士が供回りせず、締結作業が容易となる。 According to the above configuration, when the fastening member is fastened to connect the metal tubes, the second contact surfaces contact each other and restrict the rotation of the rotation stopper, so the metal tubes do not rotate together. , the fastening work becomes easier.

第３の発明では、第１又は第２の発明において、
上記締結部材挿通孔は、上記金属製チューブの半径方向外側に延びる長孔よりなる。 In the third invention, in the first or second invention,
The fastening member insertion hole is a long hole extending radially outward of the metal tube.

上記の構成によると、金属製チューブの長手方向の移動を規制しながらも締付作業が容易となる。 According to the above configuration, the tightening work is facilitated while restricting movement of the metal tube in the longitudinal direction.

第４の発明では、第１から第３のいずれか１つの発明において、
上記締結部材挿通孔は、上記金属製チューブの半径方向外側に延びる切欠よりなる。 In a fourth invention, in any one of the first to third inventions,
The fastening member insertion hole is formed of a notch extending radially outward in the metal tube.

上記の構成によると、金属製チューブの長手方向の移動を規制しながらも締付作業が容易となる。切欠であるので、一方の雌ネジに仮止めした状態の締結部材を切欠に挿通しやすい。 According to the above configuration, the tightening work is facilitated while restricting movement of the metal tube in the longitudinal direction. Since it is a notch, it is easy to insert the fastening member temporarily secured to one of the female screws into the notch.

第５の発明では、第１から第４のいずれか１つの発明において、
上記継手本体及び上記回り止め部は、他の金属製の汎用部品と同じ金型から成形された金属部品を機械加工して成形されている。 In a fifth invention, in any one of the first to fourth inventions,
The joint body and the rotation stopper are formed by machining metal parts molded from the same mold as other general-purpose metal parts.

上記の構成によると、汎用部品と同じ金型を使えるので、新たに金型を製作する必要がなく、製造コストが低減される。汎用部品は、金属製のものであれば特に限定されない。 According to the above configuration, since the same mold for general-purpose parts can be used, there is no need to create a new mold, and manufacturing costs are reduced. General-purpose parts are not particularly limited as long as they are made of metal.

第６の発明では、作業機械における油圧機器同士を接続する、金属製チューブ及び可撓性を有する油圧ホースを含む並設された複数の配管を組み付ける作業機械の油圧配管の組付方法を対象とし、
上記組付方法は、
内部に作動油が通る空洞の継手本体を長手方向中間に回転一体に固定した複数の金属製チューブを準備し、
上記複数の金属製チューブに設けられた継手本体から該金属製チューブの長手方向に対して交差する方向にそれぞれ延びる回り止め部の当接面を互いに当接させた状態で、該当接面に設けた締結部材挿通孔に締結部材を挿通して締結し、複数の金属製チューブを該金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めした状態でサブ組立し、
上記サブ組立した複数の金属製チューブを上記作業機械に組み付けし、
上記作業機械に回り止めされた状態で組み付けられた複数の金属製チューブの両端に、上記油圧ホースを接続する構成とする。 The sixth invention is directed to a method for assembling hydraulic piping for a working machine, which assembles a plurality of piping installed in parallel, including a metal tube and a flexible hydraulic hose, to connect hydraulic equipment in the working machine. ,
The above assembly method is
Prepare multiple metal tubes in which a hollow joint body through which hydraulic oil flows is rotatably fixed in the middle in the longitudinal direction.
The contact surfaces of the detent parts extending from the joint body provided on the plurality of metal tubes in a direction intersecting the longitudinal direction of the metal tubes are in contact with each other, and the detents are provided on the corresponding contact surfaces. A fastening member is inserted into the fastening member insertion hole and fastened, and the plurality of metal tubes are sub-assembled in a state in which they are prevented from rotating in the circumferential direction about the longitudinal direction of the metal tubes,
Assemble the plurality of sub-assembled metal tubes to the working machine,
The hydraulic hose is connected to both ends of a plurality of metal tubes assembled to the working machine in a non-rotating state.

上記の構成によると、複数の金属製チューブは、回り止め部の当接面で互いに当接した状態で、締結部材で固定されて金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めされるので、位置決め及び角度調整された状態でサブ組立が可能である。この位置決め及び角度調整された状態でサブ組立した複数の金属製チューブを作業機械に取り付ければよいので、一人で作業でき、また、油圧機器に接続する油圧ホースをその両端に接続する際にも、回り止め部で金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めされているので、油圧ホースと供回りしない。 According to the above configuration, the plurality of metal tubes are fixed by the fastening member while being in contact with each other at the contact surfaces of the rotation prevention parts to prevent rotation in the circumferential direction about the longitudinal direction of the metal tubes. Since it is prevented from rotating, sub-assembly is possible with the position and angle adjusted. All you have to do is attach the sub-assembled metal tubes to the working machine with their positions and angles adjusted, so one person can do the work, and also when connecting the hydraulic hose to the hydraulic equipment at both ends. Since the rotation stopper prevents rotation in the circumferential direction about the longitudinal direction of the metal tube, it does not rotate together with the hydraulic hose.

以上説明したように、本発明によれば、複数の金属製チューブをサブ組立し、作業機械に組み付けた後、油圧ホースを接続する際に金属製チューブと供回りしないようにして作業効率を向上させることができる。 As explained above, according to the present invention, after subassembling a plurality of metal tubes and assembling them into a working machine, when connecting a hydraulic hose, work efficiency is improved by preventing the metal tubes from rotating together. can be done.

本発明の作業機械の油圧配管の継手構造を含む上部フレームの一部を示す斜視図である。1 is a perspective view showing a part of an upper frame including a joint structure for hydraulic piping of a working machine according to the present invention. 金属製チューブ、油圧ホース及び継手部材を含む正面図である。It is a front view including a metal tube, a hydraulic hose, and a joint member. 継手部材が設けられた金属製チューブ同士を締結する様子を示す斜視図である。FIG. 2 is a perspective view showing how metal tubes provided with joint members are fastened together. 連結された継手部材を示す側面図である。It is a side view which shows the joint member connected. 本発明の実施形態の変形例１に係る図２相当図である。FIG. 2 is a diagram corresponding to FIG. 2 according to modification example 1 of the embodiment of the present invention. 本発明の実施形態の変形例２に係る図２相当図である。FIG. 2 is a diagram corresponding to FIG. 2 according to a second modification of the embodiment of the present invention. 本発明の実施形態の変形例を示し、（ａ）が変形例３を示し、（ｂ）が変形例４を示し、（ｃ）が変形例５を示す図４相当図である。FIG. 4 is a view corresponding to FIG. 4 showing modifications of the embodiment of the present invention, in which (a) shows a third modification, (b) shows a fourth modification, and (c) shows a fifth modification. 本発明の実施形態の変形例を示し、（ａ）が変形例６を示し、（ｂ）が変形例７を示し、（ｃ）が変形例８を示す正面図である。FIG. 6 is a front view showing modifications of the embodiment of the present invention, in which (a) shows modification example 6, (b) shows modification example 7, and (c) shows modification example 8. その他の実施形態に係る図３相当斜視図である。FIG. 4 is a perspective view corresponding to FIG. 3 according to another embodiment.

以下、本発明の実施形態を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.

図１は本発明の実施形態の作業機械の油圧配管の継手構造３０を含む上部旋回フレーム１を示す斜視図である。詳細は図示しないが、本発明の実施形態に係る作業機械としての油圧ショベルは、上部旋回フレーム１を有し、この上部旋回フレーム１には、油圧機器としての油圧ポンプ２、コントロールバルブ３、作動油タンク４等を備えている。 FIG. 1 is a perspective view showing an upper swing frame 1 including a joint structure 30 for hydraulic piping of a working machine according to an embodiment of the present invention. Although details are not shown in the drawings, a hydraulic excavator as a working machine according to an embodiment of the present invention has an upper revolving frame 1, and this upper revolving frame 1 includes a hydraulic pump 2 as hydraulic equipment, a control valve 3, and an operating machine. Equipped with 4 oil tanks, etc.

油圧ポンプ２とコントロールバルブ３とは、可撓性を有する油圧ホース２１及び金属製チューブ１１を含む並設された複数の配管１０で接続されている。本実施形態では、図２に示すように、例えば、２本の配管１０で油圧ポンプ２とコントロールバルブ３とが接続されているが、油圧機器はこれらの機器に限定されず、また、配管１０の本数は、３本以上でもよい。 The hydraulic pump 2 and the control valve 3 are connected by a plurality of pipes 10 arranged in parallel, including a flexible hydraulic hose 21 and a metal tube 11. In this embodiment, as shown in FIG. 2, for example, the hydraulic pump 2 and the control valve 3 are connected by two pipes 10, but the hydraulic equipment is not limited to these devices, and the pipes 10 The number of pieces may be three or more.

そして、これら２本の配管１０は、本発明の実施形態に係る、作業機械の油圧配管の継手構造３０によって互いに連結されている。 These two pipes 10 are connected to each other by a joint structure 30 for hydraulic pipes of a working machine according to an embodiment of the present invention.

具体的には、図２及び図４にも示すように、金属製チューブ１１には、内部に作動油が通る連通路３１ａを有する空洞の継手本体３１が回転一体に固定されており、それぞれの金属製チューブ１１の両端のチューブコネクタ１２，１３には、油圧ホース２１のホースコネクタ２２，２３が接続可能に構成されている。例えば、継手本体３１は、金属製チューブ１１を構成する丸いパイプに対して溶接等により固定されている。チューブコネクタ１２，１３とホースコネクタ２２，２３とは、上部旋回フレーム１を組み立てるメインラインで、レンチなどの工具で締め付けて固定するように構成されている。 Specifically, as shown in FIGS. 2 and 4, a hollow joint body 31 having a communication passage 31a through which hydraulic oil flows is rotatably fixed to the metal tube 11. Hose connectors 22 and 23 of a hydraulic hose 21 are configured to be connectable to tube connectors 12 and 13 at both ends of the metal tube 11. For example, the joint body 31 is fixed to a round pipe that constitutes the metal tube 11 by welding or the like. The tube connectors 12, 13 and the hose connectors 22, 23 are the main line for assembling the upper swing frame 1, and are configured to be tightened and fixed with a tool such as a wrench.

図３及び図４に拡大して示すように、継手本体３１から金属製チューブ１１の長手方向に対して交差する方向に延び、平坦な当接面３３を有する回り止め部３２が設けられている。本実施形態では、当接面３３は、金属製チューブ１１の長手方向に垂直に延びているが、傾いていてもよい。継手本体３１と回り止め部３２とは、例えば、汎用部品であるＴ字状のクランプ部品（図示せず）と共通の金型から成形される金属成型品を機械加工して得られる。 As shown enlarged in FIGS. 3 and 4, a detent portion 32 is provided that extends from the joint body 31 in a direction intersecting the longitudinal direction of the metal tube 11 and has a flat contact surface 33. . In this embodiment, the contact surface 33 extends perpendicularly to the longitudinal direction of the metal tube 11, but it may be inclined. The joint main body 31 and the rotation stopper part 32 are obtained, for example, by machining a metal molded product formed from a common mold with a T-shaped clamp component (not shown), which is a general-purpose component.

回り止め部３２には、当接面３３で互いに当接する他の回り止め部３２に挿通される締結部材４０を挿通する締結部材挿通孔３４が設けられている。本実施形態の場合、一方の締結部材挿通孔３４は貫通孔で、他方の締結部材挿通孔３４は雌ネジで構成されている。これらの組み合わせは後述するように、色々あってもよい。 The detent portion 32 is provided with a fastening member insertion hole 34 through which a fastening member 40 is inserted, which is inserted into another detent portion 32 that abuts each other on the contact surface 33 . In the case of this embodiment, one of the fastening member insertion holes 34 is a through hole, and the other fastening member insertion hole 34 is configured with a female thread. There may be various combinations of these, as will be described later.

このように、２本の金属製チューブ１１に設けられた継手本体３１からそれぞれ延びる回り止め部３２の当接面３３を互いに当接させた状態で、締結部材挿通孔３４にボルトなどの締結部材４０が挿通されて締結されることで、２本の金属製チューブ１１がそれぞれ、その長手方向を軸とする周方向の回転を阻止するように確実に回り止めされる。 In this way, a fastening member such as a bolt is inserted into the fastening member insertion hole 34 while the contact surfaces 33 of the detent portions 32 extending from the joint bodies 31 provided on the two metal tubes 11 are in contact with each other. 40 are inserted and fastened, so that each of the two metal tubes 11 is reliably prevented from rotating in the circumferential direction about its longitudinal direction as an axis.

上述したように、継手本体３１及び回り止め部３２は、他の金属製の汎用部品と同じ金型から成形された金属部品を機械加工して成形されると有利である。つまり、汎用部品と同じ金型を使えるので、新たに金型を製作する必要がなく、製造コストが低減される。 As mentioned above, the joint body 31 and the rotation stopper 32 are advantageously formed by machining metal parts molded from the same mold as other general-purpose metal parts. In other words, since the same mold for general-purpose parts can be used, there is no need to create a new mold, reducing manufacturing costs.

次に、本実施形態に係る作業機械の油圧配管の組付手順について説明する。 Next, a procedure for assembling the hydraulic piping of the working machine according to the present embodiment will be explained.

まず、２本の金属製チューブ１１は、メインラインに納入される前に、サブ組立される。 First, the two metal tubes 11 are sub-assembled before being delivered to the main line.

具体的には、まず、長手方向中間の所定位置に継手本体３１が溶接され、両端にチューブコネクタ１２，１３が溶接された２本の金属製チューブ１１と、締結部材４０とを準備する。継手本体３１は、チューブコネクタ１２，１３と油圧ホース２１との接続角度などを考慮した位置に当接面３３が来るようにした正しい位置で溶接される。すなわち、サブ組立の段階で、２本の金属製チューブ１１の位置合わせ及び傾き調整が行われる。 Specifically, first, two metal tubes 11 having a joint body 31 welded to a predetermined longitudinally intermediate position and tube connectors 12 and 13 welded to both ends, and a fastening member 40 are prepared. The joint body 31 is welded at a correct position such that the contact surface 33 is located at a position that takes into account the connection angle between the tube connectors 12, 13 and the hydraulic hose 21, etc. That is, in the sub-assembly stage, the two metal tubes 11 are aligned and their inclinations are adjusted.

次いで、図３に示すように、互いに当接面３３で当接した状態で締結部材４０を締め付ける。このようにして、２本の金属製チューブ１１部分のサブ組立が行われる。 Next, as shown in FIG. 3, the fastening members 40 are tightened with their contact surfaces 33 abutting each other. In this way, the subassembly of the two metal tubes 11 is performed.

なお、図示しないが、回り止め部３２は、当接面３３とは異なる方向に延びる第２当接面を有していてもよい。この第２当接面は、締結部材４０の延びる方向に沿うように延びている。例えば、当接面３３を段付きにし、締結部材４０の延びる方向に沿うように延びる第２当接面を設けるとよい。そうすると、当接面３３だけでなく、第２当接面同士も当接して回り止め部３２同士の回転も規制するので、サブ組立で締結部材４０を締結して金属製チューブ１１間を接続するときに金属製チューブ１１同士が供回りせず、締結作業が容易となる。 Although not shown, the detent portion 32 may have a second abutment surface extending in a direction different from the abutment surface 33. This second contact surface extends along the direction in which the fastening member 40 extends. For example, the contact surface 33 may be stepped and a second contact surface extending along the direction in which the fastening member 40 extends may be provided. Then, not only the contact surfaces 33 but also the second contact surfaces come into contact with each other and the rotation of the detents 32 is restricted, so the fastening member 40 is fastened in the sub-assembly to connect the metal tubes 11. Sometimes the metal tubes 11 do not rotate with each other, making the fastening work easier.

次いで、そのサブ組立した複数の金属製チューブ１１をメインラインに搬入し、それを上部旋回フレーム１に取り付ける。 Next, the plurality of sub-assembled metal tubes 11 are carried into the main line and attached to the upper rotating frame 1.

この固定は、図１に二点鎖線で示すように、上部旋回フレーム１に取り付けるクランプ５により行う。このクランプ５のみでは、金属製チューブ１１の長手方向の移動や、回転を十分に規制できない。しかし、本発明の継手構造３０によって２本の金属製チューブ１１が互いに固定されているので、これらを上部旋回フレーム１に組み付けて固定作業を行う際には、金属製チューブ１１を支持しておく人と、金属製チューブ１１をクランプ止めする人の二人で作業する必要はなく、一人で作業できる。しかも、継手構造３０によって、２本の金属製チューブ１１は、位置合わせ及び傾き調整をすでにされているので、組付時に位置合わせ及び傾き調整をする必要がない。 This fixation is performed by a clamp 5 attached to the upper swing frame 1, as shown by the two-dot chain line in FIG. This clamp 5 alone cannot sufficiently restrict movement and rotation of the metal tube 11 in the longitudinal direction. However, since the two metal tubes 11 are fixed to each other by the joint structure 30 of the present invention, it is necessary to support the metal tubes 11 when assembling them to the upper swing frame 1 and performing the fixing work. There is no need for the work to be carried out by two people, the person who clamps the metal tube 11, and the work can be done by one person. Moreover, since the two metal tubes 11 have already been aligned and adjusted in inclination by the joint structure 30, there is no need to adjust the alignment and inclination at the time of assembly.

そして、油圧ポンプ２に接続される油圧ホース２１のホースコネクタ２３とコントロールバルブ３に接続される油圧ホース２１のホースコネクタ２２とをチューブコネクタ１２，１３にそれぞれ接続する。この際、レンチなどの工具を用いて必要な締付トルクで行う。このとき、金属製チューブ１１は、堅固に回り止め部３２同士で連結され金属製チューブ１１の長手方向を軸とする周方向の回転を阻止されているので、油圧ホース２１と供回りすることはない。 Then, the hose connector 23 of the hydraulic hose 21 connected to the hydraulic pump 2 and the hose connector 22 of the hydraulic hose 21 connected to the control valve 3 are connected to the tube connectors 12 and 13, respectively. At this time, use a tool such as a wrench to apply the necessary tightening torque. At this time, the metal tubes 11 are firmly connected by the rotation prevention parts 32 and prevented from rotating in the circumferential direction about the longitudinal direction of the metal tubes 11, so that they cannot rotate together with the hydraulic hose 21. do not have.

したがって、本実施形態に係る作業機械の油圧配管の継手構造によると、複数の金属製チューブ１１をサブ組立し、上部旋回フレーム１に組み付けた後、油圧ホース２１を接続する際に金属製チューブと供回りしないようにして作業効率を格段に向上させることができる。 Therefore, according to the joint structure for hydraulic piping of a working machine according to the present embodiment, after subassembling the plurality of metal tubes 11 and assembling them to the upper swing frame 1, when connecting the hydraulic hose 21, the metal tubes and Work efficiency can be greatly improved by not having to run around the same time.

－変形例１－
図５は本発明の実施形態の変形例１を示し、継手構造３０’の構成が異なる点で上記実施形態と異なる。なお、以下の各変形例では、図１～図４と同じ部分については同じ符号を付してその詳細な説明は省略する。 -Modification 1-
FIG. 5 shows a first modification of the embodiment of the present invention, which differs from the above embodiment in that the configuration of the joint structure 30' is different. In each modification below, the same parts as in FIGS. 1 to 4 are given the same reference numerals, and detailed explanation thereof will be omitted.

本変形例では、継手本体３１’が金属製チューブ１１の長手方向に長く、回り止め部３２’に２つの締結部材挿通孔３４が並設されている。このため、２つの締結部材４０を用いて回り止め部３２’が固定されるので、金属製チューブ１１同士が互いに回転するのが確実に防止される。 In this modification, the joint main body 31' is long in the longitudinal direction of the metal tube 11, and two fastening member insertion holes 34 are arranged in parallel in the detent portion 32'. Therefore, since the rotation stopper 32' is fixed using the two fastening members 40, the metal tubes 11 are reliably prevented from rotating relative to each other.

このため、サブ組立作業、サブ組立後の搬送作業及びメインラインでの上部旋回フレーム１への組付作業がさらに容易となる。 Therefore, the subassembly work, the transportation work after the subassembly, and the assembly work to the upper swing frame 1 on the main line are further facilitated.

－変形例２－
図６は本発明の実施形態の変形例２を示し、継手構造３０の数が異なる点で上記実施形態と異なる。 -Modification 2-
FIG. 6 shows a second modification of the embodiment of the present invention, which differs from the above embodiment in that the number of joint structures 30 is different.

本変形例では、継手本体３１が金属製チューブ１１の長手方向に間隔を開けて例えば２つ設けられている。つまり、２組の回り止め部３２が長手方向に距離を開けて締結されるので、金属製チューブ１１同士が互いに回転するのがさらに確実に防止される。 In this modification, for example, two joint bodies 31 are provided at intervals in the longitudinal direction of the metal tube 11. That is, since the two sets of anti-rotation parts 32 are fastened with a distance in the longitudinal direction, rotation of the metal tubes 11 relative to each other is more reliably prevented.

このため、サブ組立、サブ組立後の搬送及びメインラインでの上部旋回フレーム１への組付作業がさらに容易となる。 Therefore, subassembly, transportation after subassembly, and assembly to the upper swing frame 1 on the main line are further facilitated.

－変形例３－
図７（ａ）は本発明の実施形態の変形例３を示し、回り止め部１３２の構成が異なる点で上記実施形態と異なる。 -Modification 3-
FIG. 7A shows a third modification of the embodiment of the present invention, which differs from the above embodiment in that the configuration of the rotation stopper 132 is different.

本変形例では、回り止め部１３２の締結部材４０の締付方向の長さ（厚さ）が薄くなっている。そして、両方の締結部材挿通孔３４は、貫通孔で、締結部材４０の反対側にナット４１が締結されている。 In this modification, the length (thickness) of the rotation stopper 132 in the tightening direction of the fastening member 40 is thinner. Both of the fastening member insertion holes 34 are through holes, and a nut 41 is fastened to the opposite side of the fastening member 40.

そうすると、回り止め部３２の形状が同一なので、共通部品を使うことができ、製造コスト及び部品管理コストが減る。また、締結部材４０及びナット４１が出っ張らない。 Then, since the detent portions 32 have the same shape, common parts can be used, reducing manufacturing costs and parts management costs. Furthermore, the fastening member 40 and nut 41 do not protrude.

－変形例４－
図７（ｂ）は本発明の実施形態の変形例３を示し、回り止め部２３２，２３２’の構成が異なる点で上記実施形態と異なる。 -Modification 4-
FIG. 7(b) shows a third modification of the embodiment of the present invention, which differs from the above embodiment in that the configurations of the rotation prevention parts 232, 232' are different.

本変形例では、回り止め部２３２の締結部材４０の締付方向の長さが厚くなっている。そして、一方の回り止め部２３２の締結部材挿通孔３４は、貫通孔で、他方の回り止め部２３２’の締結部材挿通孔３４は雌ネジとなっている。 In this modification, the length of the detent portion 232 in the tightening direction of the fastening member 40 is increased. The fastening member insertion hole 34 of one of the rotation prevention parts 232 is a through hole, and the fastening member insertion hole 34 of the other rotation prevention part 232' is a female thread.

そうすると、回り止め部３２の形状が同一で、孔加工のみ変更すればよく、また、共通の金型による汎用部品からの機械加工量が減る。 In this case, the shape of the detent portion 32 is the same, only the hole machining needs to be changed, and the amount of machining from a general-purpose part using a common mold is reduced.

－変形例５－
図７（ｃ）は本発明の実施形態の変形例５を示し、回り止め部２３２の構成が異なる点で上記実施形態と異なる。 -Modification 5-
FIG. 7C shows a fifth modification of the embodiment of the present invention, which differs from the above embodiment in that the configuration of the rotation stopper 232 is different.

本変形例では、回り止め部３２の締結部材４０の締付方向の長さが厚くなっている。そして、変形例４と異なり、両方の締結部材挿通孔３４は、貫通孔で、締結部材４０の反対側にナット４１が締結されている。 In this modification, the length of the detent portion 32 in the tightening direction of the fastening member 40 is increased. Unlike the fourth modification, both of the fastening member insertion holes 34 are through holes, and a nut 41 is fastened to the opposite side of the fastening member 40.

そうすると、回り止め部３２の形状が同一なので、共通部品を使うことができ、製造コスト及び部品管理コストが減る。また、共通の金型による汎用部品からの機械加工量が減る。 Then, since the detent portions 32 have the same shape, common parts can be used, reducing manufacturing costs and parts management costs. Additionally, the amount of machining from general-purpose parts using a common mold is reduced.

－変形例６－
図８（ａ）は本発明の実施形態の変形例６を示し、締結部材挿通孔３４’の構成が異なる点で上記実施形態と異なる。 -Modification 6-
FIG. 8(a) shows a sixth modification of the embodiment of the present invention, which differs from the above embodiment in that the configuration of the fastening member insertion hole 34' is different.

本変形例では、締結部材挿通孔３４’は、金属製チューブ１１の半径方向外側に延びる長孔よりなる。 In this modification, the fastening member insertion hole 34' is a long hole extending radially outward of the metal tube 11.

本変形例では、金属製チューブ１１の長手方向の移動を規制しながらも締付作業が容易となる。 In this modification, the tightening work is facilitated while restricting movement of the metal tube 11 in the longitudinal direction.

－変形例７－
図８（ｂ）は本発明の実施形態の変形例７を示し、締結部材挿通孔３４’’の構成が異なる点で上記実施形態と異なる。 -Modification 7-
FIG. 8(b) shows a seventh modification of the embodiment of the present invention, which differs from the above embodiment in that the configuration of the fastening member insertion hole 34'' is different.

締結部材挿通孔３４’’は、金属製チューブ１１の半径方向外側に延びる切欠よりなる。この変形例では、金属製チューブ１１の長手方向の移動を規制しながらも締付作業が容易となる。締結部材挿通孔３４’’は、切欠で構成されているので、一方の雌ネジに仮止めした状態の締結部材４０を切欠に挿通しやすい。 The fastening member insertion hole 34'' consists of a notch extending radially outward of the metal tube 11. In this modification, the tightening work is facilitated while restricting movement of the metal tube 11 in the longitudinal direction. Since the fastening member insertion hole 34'' is configured with a notch, it is easy to insert the fastening member 40 temporarily fixed to one of the female screws into the notch.

－変形例８－
図８（ｃ）は本発明の実施形態の変形例８を示し、締結部材挿通孔３４’’’の構成が異なる点で上記実施形態と異なる。 -Modification 8-
FIG. 8(c) shows a modified example 8 of the embodiment of the present invention, which differs from the above embodiment in that the configuration of the fastening member insertion hole 34''' is different.

つまり、締結部材挿通孔３４’’’は、上記実施形態の締結部材挿通孔３４よりも大きな貫通孔となっている。 That is, the fastening member insertion hole 34''' is a larger through hole than the fastening member insertion hole 34 of the above embodiment.

本変形例では、締結部材挿通孔３４’’’は、いわゆる遊びの大きいバカ孔よりなるので、金属製チューブ１１等に多少の製造誤差があったとしても、締結部材４０の締結が容易となる。 In this modification, the fastening member insertion hole 34''' is a so-called blank hole with a large play, so even if there is some manufacturing error in the metal tube 11 etc., the fastening member 40 can be easily fastened. .

（その他の実施形態）
本発明は、上記実施形態について、以下のような構成としてもよい。 (Other embodiments)
The present invention may have the following configuration for the above embodiment.

すなわち、上記実施形態では、作業機械は、油圧ショベルとしたが、油圧機器を有する作業機械であれば、破砕機、クレーン、高所作業車など特に限定されない。 That is, in the above embodiment, the working machine is a hydraulic excavator, but the working machine is not particularly limited as long as it has hydraulic equipment, such as a crusher, a crane, and an aerial work vehicle.

上記実施形態では、金属製チューブ１１を２本並べたが、例えば、金属製チューブ１１を３本上下に並べる場合には、上側の金属製チューブ１１と真ん中の金属製チューブ１１を継手構造３０で連結し、真ん中の金属製チューブ１１と下側の金属製チューブ１１を継手構造３０で連結すればよい。また、図９に示す継手構造３３０のように、真ん中の金属製チューブ１１の継手本体３３１に対して回り止め部３３２を上下に設け、それらの当接面３３を、上下の回り止め部３２の当接面３３に当接させた状態で、それぞれ締結部材４０で締結するようにしてもよい。４本以上の金属製チューブ１１を連結する場合も同様に２本ずつ連結してもよいし、３本ずつ連結してもよい。例えば、１５ｋｇ以内の質量でサブ組立すれば一人でハンドリングできて有利である。 In the above embodiment, two metal tubes 11 are arranged, but for example, when three metal tubes 11 are arranged one above the other, the upper metal tube 11 and the middle metal tube 11 are connected by the joint structure 30. The middle metal tube 11 and the lower metal tube 11 may be connected by a joint structure 30. Further, as in a joint structure 330 shown in FIG. 9, detents 332 are provided above and below the joint main body 331 of the middle metal tube 11, and their contact surfaces 33 are connected to the upper and lower detents 32. The fastening members 40 may be used to fasten each of the fastening members 40 while in contact with the contact surface 33 . When connecting four or more metal tubes 11, they may be connected two at a time, or three at a time. For example, it is advantageous that one person can handle the subassembly with a mass of less than 15 kg.

なお、以上の実施形態は、本質的に好ましい例示であって、本発明、その適用物や用途の範囲を制限することを意図するものではない。 Note that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications, or uses.

１ 上部旋回フレーム
２ 油圧ポンプ
３ コントロールバルブ
４ 作動油タンク
５ クランプ
１０ 配管
１１ 金属製チューブ
１２，１３ チューブコネクタ
２１ 油圧ホース
２２，２３ ホースコネクタ
３０ 継手構造
３１ 継手本体
３１ａ 連通路
３２ 回り止め部
３３ 当接面
３４ 締結部材挿通孔
３４’ 締結部材挿通孔
３４’’ 締結部材挿通孔
３４’’’ 締結部材挿通孔
４０ 締結部材
４１ ナット
１３１ 継手本体
１３２ 回り止め部
２３２，２３２’ 回り止め部
３３０ 継手構造
３３１ 継手本体
３３２ 回り止め部 1 Upper rotating frame
2 Hydraulic pump
3 Control valve
4 Hydraulic oil tank
5 Clamp
10 Piping
11 Metal tube
12,13 Tube connector
21 Hydraulic hose
22, 23 Hose connector
30 Joint structure
31 Joint body
31a Communication path
32 Detent part
33 Contact surface
34 Fastening member insertion hole
34' Fastening member insertion hole
34'' Fastening member insertion hole
34''' Fastening member insertion hole
40 Fastening member
41 Nut
131 Joint body
132 Detent part
232, 232' Rotating portion 330 Joint structure
331 Joint body 332 Stopper part

Claims (6)

作業機械における油圧機器同士を接続する、金属製チューブ及び可撓性を有する油圧ホースを含む並設された複数の配管を互いに固定する作業機械の油圧配管の継手構造であって、
上記金属製チューブには、内部に作動油が通る空洞の継手本体が回転一体に固定され、該金属製チューブの両端には、上記油圧ホースが接続可能に構成されており、
上記継手本体から上記金属製チューブの長手方向に対して交差する方向に延び、平坦な当接面を有する回り止め部が設けられ、
上記回り止め部には、上記当接面で互いに当接する他の回り止め部に挿通される締結部材を挿通する締結部材挿通孔が設けられ、
上記複数の金属製チューブに設けられた継手本体からそれぞれ延びる上記回り止め部の当接面を互いに当接させた状態で、上記締結部材挿通孔に上記締結部材が挿通されて締結されることで、上記金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めされている
ことを特徴とする作業機械の油圧配管の継手構造。 A joint structure for hydraulic piping of a working machine, which fixes to each other a plurality of pipes installed in parallel, including metal tubes and flexible hydraulic hoses, which connect hydraulic equipment in the working machine,
A hollow joint body through which hydraulic oil passes is rotatably fixed to the metal tube, and the hydraulic hose is connectable to both ends of the metal tube,
a detent portion extending from the joint body in a direction intersecting the longitudinal direction of the metal tube and having a flat contact surface;
The detent portion is provided with a fastening member insertion hole through which a fastening member that is inserted through another detent portion that abuts each other on the contact surface is inserted;
The fastening member is inserted into the fastening member insertion hole and fastened with the contact surfaces of the detent portions extending from the joint bodies provided on the plurality of metal tubes being in contact with each other. A joint structure for a hydraulic piping for a working machine, characterized in that the metal tube is prevented from rotating in the circumferential direction about the longitudinal direction of the tube. 請求項１に記載の作業機械の油圧配管の継手構造であって、
上記回り止め部は、上記当接面とは異なる第２当接面を有し、該第２当接面は、上記締結部材の延びる方向に沿う方向に延びている
ことを特徴とする作業機械の油圧配管の継手構造。 A joint structure for hydraulic piping of a working machine according to claim 1,
The working machine characterized in that the rotation preventing portion has a second abutment surface different from the abutment surface, and the second abutment surface extends in a direction along the direction in which the fastening member extends. hydraulic piping joint structure. 請求項１又は２に記載の作業機械の油圧配管の継手構造であって、
上記締結部材挿通孔は、上記金属製チューブの半径方向外側に延びる長孔よりなる
ことを特徴とする作業機械の油圧配管の継手構造。 A joint structure for hydraulic piping of a working machine according to claim 1 or 2,
A joint structure for hydraulic piping for a working machine, wherein the fastening member insertion hole is an elongated hole extending radially outward of the metal tube. 請求項１又は２に記載の作業機械の油圧配管の継手構造であって、
上記締結部材挿通孔は、上記金属製チューブの半径方向外側に延びる切欠よりなる
ことを特徴とする作業機械の油圧配管の継手構造。 A joint structure for hydraulic piping of a working machine according to claim 1 or 2,
A joint structure for hydraulic piping for a working machine, wherein the fastening member insertion hole is a notch extending radially outward in the metal tube. 請求項１から４のいずれか１つに記載の作業機械の油圧配管の継手構造であって、
上記継手本体及び上記回り止め部は、他の金属製の汎用部品と同じ金型から成形された金属部品を機械加工して成形されている
ことを特徴とする作業機械の油圧配管の継手構造。 A joint structure for hydraulic piping of a working machine according to any one of claims 1 to 4,
A joint structure for hydraulic piping for a working machine, wherein the joint body and the rotation stopper are formed by machining metal parts molded from the same mold as other general-purpose metal parts. 作業機械における油圧機器同士を接続する、金属製チューブ及び可撓性を有する油圧ホースを含む並設された複数の配管を組み付ける作業機械の油圧配管の組付方法であって、
内部に作動油が通る空洞の継手本体を長手方向中間に回転一体に固定した複数の金属製チューブを準備し、
上記複数の金属製チューブに設けられた継手本体から該金属製チューブの長手方向に対して交差する方向にそれぞれ延びる回り止め部の当接面を互いに当接させた状態で、該当接面に設けた締結部材挿通孔に締結部材を挿通して締結し、複数の金属製チューブを該金属製チューブの長手方向を軸とする周方向の回転を阻止するように回り止めした状態でサブ組立し、
上記サブ組立した複数の金属製チューブを上記作業機械に組み付けし、
上記作業機械に回り止めされた状態で組み付けられた複数の金属製チューブの両端に、上記油圧ホースを接続する
ことを特徴とする作業機械の油圧配管の組付方法。 A method for assembling hydraulic piping for a working machine, which involves assembling a plurality of piping installed in parallel, including a metal tube and a flexible hydraulic hose, to connect hydraulic equipment in the working machine, the method comprising:
Prepare multiple metal tubes in which a hollow joint body through which hydraulic oil flows is rotatably fixed in the middle in the longitudinal direction.
The contact surfaces of the detent parts extending from the joint body provided on the plurality of metal tubes in a direction intersecting the longitudinal direction of the metal tubes are in contact with each other, and the detents are provided on the corresponding contact surfaces. A fastening member is inserted into the fastening member insertion hole and fastened, and the plurality of metal tubes are sub-assembled in a state in which they are prevented from rotating in the circumferential direction about the longitudinal direction of the metal tubes,
Assemble the plurality of sub-assembled metal tubes to the working machine,
A method for assembling hydraulic piping for a working machine, characterized in that the hydraulic hose is connected to both ends of a plurality of metal tubes that are assembled to the working machine in a non-rotating state.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4878696A (en) 1988-10-11 1989-11-07 Hydro-Craft, Inc. Hexagonal junction adapter for clamping system
JP2010285816A (en) 2009-06-12 2010-12-24 Kobelco Contstruction Machinery Ltd Pipe detent structure of working machine
JP5340402B2 (en) 2008-11-24 2013-11-13 エヌビディア・テクノロジー・ユーケー・リミテッド Active power management
JP2013238074A (en) 2012-05-16 2013-11-28 Kobelco Contstruction Machinery Ltd Work machine
JP2014152466A (en) 2013-02-06 2014-08-25 Kobelco Contstruction Machinery Ltd Valve fixing structure for construction machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4878696A (en) 1988-10-11 1989-11-07 Hydro-Craft, Inc. Hexagonal junction adapter for clamping system
JP5340402B2 (en) 2008-11-24 2013-11-13 エヌビディア・テクノロジー・ユーケー・リミテッド Active power management
JP2010285816A (en) 2009-06-12 2010-12-24 Kobelco Contstruction Machinery Ltd Pipe detent structure of working machine
JP2013238074A (en) 2012-05-16 2013-11-28 Kobelco Contstruction Machinery Ltd Work machine
JP2014152466A (en) 2013-02-06 2014-08-25 Kobelco Contstruction Machinery Ltd Valve fixing structure for construction machine

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