JPH0642539A - Shaft coupling structure - Google Patents
Shaft coupling structureInfo
- Publication number
- JPH0642539A JPH0642539A JP4196980A JP19698092A JPH0642539A JP H0642539 A JPH0642539 A JP H0642539A JP 4196980 A JP4196980 A JP 4196980A JP 19698092 A JP19698092 A JP 19698092A JP H0642539 A JPH0642539 A JP H0642539A
- Authority
- JP
- Japan
- Prior art keywords
- joint
- shaft
- fitting
- hook
- press
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、地中止水壁施工機械や
地盤改良機械をはじめとする基礎工事機械等において用
いられる軸同士を連結する軸継手構造に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling structure for connecting shafts used in foundation construction machines such as ground suspended water wall construction machines and ground improvement machines.
【０００２】[0002]
【従来の技術】上記のような基礎工事機械等において
は、長尺の軸が使用されることが多い。例えば、地中撹
拌式の地盤改良装置においては、何十メートルにも及ぶ
撹拌軸が上下方向に設置される。このような長尺の軸
は、そのままでは製造、運搬が極めて困難であるため、
一般には軸方向に複数に分割され、工事現場で適宜継ぎ
足されながら使用される。従って、このような軸には、
分割軸同士を連結するための軸継手が必要となる。2. Description of the Related Art In a foundation construction machine as described above, a long shaft is often used. For example, in an underground stirring type ground improvement device, a stirring shaft extending up to tens of meters is installed in the vertical direction. Since such a long shaft is extremely difficult to manufacture and transport as it is,
Generally, it is divided into a plurality of parts in the axial direction and used while being appropriately added at the construction site. Therefore, for such an axis,
A shaft joint for connecting the split shafts is required.
【０００３】このような軸継手としては、ねじ式、ピン
式、フランジ式等が知られているが、このうちねじ式の
ものは使用中にねじが緩むおそれがあるため、一般には
ピン式やフランジ式のものが多用されている。As such a shaft joint, a screw type, a pin type, a flange type and the like are known. Among them, the screw type generally has a pin type or a pin type because the screw may loosen during use. The flange type is often used.
【０００４】図５はフランジ式の軸継手構造の一例を示
したものである。図において、互いに連結される軸９０
の端部には、雄側フランジ９１及び雌側フランジ９２が
各々固定され、雄側フランジ９１の中央には円筒状の嵌
合突出部９１ａが、雌側フランジ９２の中央部には上記
嵌入部９２ａが嵌入可能な形状をもつ嵌入穴９２ａが形
成されている。そして、両者を嵌合した状態で、上記雄
側フランジ９１の周縁部に設けられたボルト穴９１ｂ及
び雌側フランジ９２の周縁部に設けられたボルト穴９２
ｂにボルト９３を通し、これにナット９４を締め付ける
ことにより、両軸９０の連結が行われている。FIG. 5 shows an example of a flange type shaft coupling structure. In the figure, shafts 90 connected to each other
A male side flange 91 and a female side flange 92 are respectively fixed to the ends of the male side flange 91, a cylindrical fitting protrusion 91a is formed at the center of the male side flange 91, and the fitting portion is formed at the center of the female side flange 92. An insertion hole 92a having a shape into which 92a can be inserted is formed. Then, in a state in which both are fitted, a bolt hole 91 b provided in the peripheral portion of the male side flange 91 and a bolt hole 92 provided in the peripheral portion of the female side flange 92.
The two shafts 90 are connected by passing a bolt 93 through b and tightening a nut 94 on the bolt.
【０００５】また、図６，７に示すピン式のものでは、
雄継手９５に図７に示すような断面六角形状の嵌入部９
５ａが形成されているのに対し、雌継手９６には上記嵌
入部９５ａが嵌入可能な嵌入穴９６ａが設けられてお
り、この嵌入がなされた状態で側方からピン９９が挿入
されることにより、両継手９５，９６が連結される。な
お、図において９７，９８はシール部材、１００はピン
抜け止め用のＣリングである。Further, in the pin type shown in FIGS.
The male joint 95 has a fitting portion 9 having a hexagonal cross section as shown in FIG.
5a is formed, the female joint 96 is provided with a fitting hole 96a into which the fitting portion 95a can be fitted. By inserting the pin 99 from the side in this fitted state, , Both joints 95 and 96 are connected. In the figure, 97 and 98 are seal members, and 100 is a C ring for preventing the pin from coming off.
【０００６】[0006]
【発明が解決しようとする課題】図５に示したようなフ
ランジ式の継手では、ボルト、ナットの締結・緩脱に時
間がかかるとともに、土にまみれるボルト・ナットのメ
ンテナンスも必要となり、大幅なコストアップ及び施工
能率の低下は免れ得ない。しかも、継手部の径が軸径よ
りも大きいので、その分、貫入・引抜き抵抗が増大する
不都合がある。In the flange type joint as shown in FIG. 5, it takes a long time to fasten and loosen the bolts and nuts, and maintenance of the bolts and nuts covered with soil is also required. Increasing costs and lowering construction efficiency cannot be avoided. Moreover, since the diameter of the joint portion is larger than the shaft diameter, there is the disadvantage that the penetration / pull-out resistance increases correspondingly.
【０００７】一方、図６，７に示すピン式のものでは、
両継手を嵌合して連結した後も、両嵌合部の間には軸径
方向のすきまが必ず生じるので、このすきまに起因して
両継手ががたつき、この継手部分で軸９０の向きが微妙
に変わって、軸９０が精密に一直線上に並んだ状態で連
結されない不都合がある。また、上記がたつきを削減す
るために嵌め合いをきつくすると、その分嵌入作業はま
すます困難化することになる。On the other hand, in the pin type shown in FIGS.
Even after both fittings are fitted and connected, a clearance in the axial radial direction is always generated between the fitting parts. Therefore, both fittings rattle due to this clearance, and the joint portion of the shaft 90 moves. There is a disadvantage that the orientation is slightly changed and the shafts 90 are not precisely connected in a straight line. Further, if the fitting is tight in order to reduce the rattling, the fitting work becomes more and more difficult.
【０００８】本発明は、このような事情に鑑み、連結作
業をワンタッチで短時間のうちに行うことを可能にし、
しかも連結後のがたつきを防ぐことができる軸継手及び
軸連結構造を提供することを目的とする。In view of such circumstances, the present invention makes it possible to perform the connecting work with one touch in a short time,
Moreover, it is an object of the present invention to provide a shaft coupling and a shaft connecting structure capable of preventing rattling after connection.
【０００９】[0009]
【課題を解決するための手段】本発明は、軸同士を連結
するための軸継手構造であって、一方の軸の端部に装着
される第１の継手と、他方の軸の端部に装着され、上記
第１の継手と嵌合可能な第２の継手とを備え、上記第１
の継手において上記第２の継手が連結される側の端部
に、軸周に対する接線と略平行な方向に突出する第１の
突出部を先端にもつ複数の第１のフック部を設け、上記
第２の継手において上記第１の継手が連結される側の端
部に、上記第１のフック部の突出部と反対側に突出する
第２の突出部を先端に有し、第１のフック部同士の離間
距離よりも小さい幅寸法を有し、各第１のフック部に係
合される第２のフック部を設けるとともに、上記第１の
継手に、上記第２の継手に向かう方向に付勢され、くさ
び状端部を有し、上記第１のフック部と第２のフック部
とが係合された状態で上記くさび状端部が第１のフック
部と第２のフック部との間に上記付勢力で圧入される圧
入位置とこの圧入位置よりも第２の継手から離れた退避
位置との間で継手軸方向に移動可能な複数の圧入部材を
設けたものである（請求項１）。SUMMARY OF THE INVENTION The present invention is a shaft joint structure for connecting shafts to each other, wherein a first joint mounted on an end portion of one shaft and an end portion of another shaft. A second joint that is mounted and that can be fitted to the first joint;
A plurality of first hook portions each having a first projecting portion projecting in a direction substantially parallel to a tangent to the shaft periphery at the tip end thereof are provided at an end portion of the joint of the second joint to which the second joint is connected, In the end of the second joint on the side to which the first joint is connected, a second protrusion that protrudes to the opposite side of the protrusion of the first hook is provided at the tip, and the first hook is provided. A second hook portion having a width dimension smaller than the distance between the portions and engaged with each first hook portion is provided, and the first joint is provided in a direction toward the second joint. The wedge-shaped end portion is biased and has a wedge-shaped end portion, and the wedge-shaped end portion has a first hook portion and a second hook portion in a state in which the first hook portion and the second hook portion are engaged with each other. Between the press-fitting position press-fitted by the above-mentioned urging force and the retracted position farther from the second joint than the press-fitting position. It is provided with a plurality of press-fitting member movable in direction (claim 1).
【００１０】ここで、上記両突出部が互いに当接する面
はテーパー面とすることが望ましく（請求項２）、上記
第１のフック部が第２の継手に向かう端面及び第２のフ
ック部が第１の継手に向かう端面も、第２のフック部を
第１のフック部同士の間に案内する方向のテーパー面と
することが望ましい（請求項４）。Here, it is desirable that the surfaces of the two protrusions that come into contact with each other are tapered surfaces (claim 2), and that the end surface of the first hook portion facing the second joint and the second hook portion are the same. The end face toward the first joint is also preferably a tapered face in the direction of guiding the second hook portion between the first hook portions (claim 4).
【００１１】後述のように各圧入部材を強制移動させる
際、これらの圧入部材を工具等で直接把持するようにし
てもよいが、各圧入部材の外周面にこれらの圧入部材に
対して一定範囲内で相対変位可能となるように***作リ
ングを嵌合し、この***作リングを把持するようにすれ
ば、後述のようなより優れた効果が得られる（請求項
３）。When each press-fitting member is forcibly moved as will be described later, these press-fitting members may be directly gripped by a tool or the like. If the operated ring is fitted so as to be relatively displaceable inside and the operated ring is gripped, a more excellent effect as described later can be obtained (claim 3).
【００１２】上記両継手同士の嵌合構造は特に問わない
が、上記第１の継手、第２の継手のいずれか一方に、上
記軸が装着される側と反対側の方向に開口しかつ開口に
向かうに従って拡径するテーパー状の嵌入穴を設け、他
方の継手において上記軸が装着される側と反対の側に、
上記嵌入穴内に嵌入可能なテーパー状の嵌入部を設けた
ものが、特に好適である（請求項５）。The fitting structure of the two joints is not particularly limited, but either one of the first joint and the second joint is opened in the direction opposite to the side on which the shaft is mounted and is opened. A tapered insertion hole that expands in diameter toward the side is provided, and on the side opposite to the side where the shaft is mounted in the other joint,
It is particularly preferable to provide a taper-shaped fitting portion that can be fitted into the fitting hole (claim 5).
【００１３】[0013]
【作用】上記構成によれば、次の要領で軸同士の連結及
び切離しを行うことができる。According to the above construction, the shafts can be connected and separated from each other in the following manner.
【００１４】まず、第１のフック部における第１の突出
部を第２のフック部同士の間に挿入しながら両継手を嵌
合する。この際、第１の継手に設けられた圧入部材は第
２のフック部の端面に当接するため、上記第１の突出部
の挿入に伴って圧入部材は付勢力に抗して上記挿入方向
とは反対側の方向に逃げる。First, both joints are fitted while inserting the first projecting portion of the first hook portion between the second hook portions. At this time, since the press-fitting member provided on the first joint abuts on the end surface of the second hook portion, the press-fitting member resists the urging force and moves in the insertion direction in accordance with the insertion of the first protrusion. Escape in the opposite direction.
【００１５】両継手を嵌合した後、両継手を相対回転さ
せ、第１の突出部を第２の突出部の内側にもぐり込ませ
る、すなわち第１のフック部と第２のフック部とを係合
すると、上記圧入部材のくさび状端部が上記付勢力によ
って上記第１のフック部と第２のフック部との間に圧入
される。すなわち、圧入部材が退避位置から圧入位置へ
移動する。この結合完了状態では、圧入部材端部のくさ
び作用により第１のフック部と第２のフック部との間の
がたつきが防がれるとともに、両フック部の係合により
両継手間で軸方向力及び回転力の双方が伝達される。After fitting both joints, both joints are rotated relative to each other so that the first projecting portion is also inserted into the inside of the second projecting portion, that is, the first hook portion and the second hook portion. When engaged, the wedge-shaped end portion of the press-fitting member is press-fitted between the first hook portion and the second hook portion by the biasing force. That is, the press-fitting member moves from the retracted position to the press-fitting position. In this connection completed state, the wedge action of the end portion of the press-fitting member prevents rattling between the first hook portion and the second hook portion, and the engagement of both hook portions causes the shaft between both joints to move. Both directional and rotational forces are transmitted.
【００１６】次に、この状態から各圧入部材を工具で把
持する等して上記付勢力に抗して退避位置まで戻し、上
記と逆方向に継手同士を相対回転させてフック部同士の
係合を外すことにより、両継手を切り離すことができ
る。Next, from this state, each press-fitting member is gripped with a tool to return to the retracted position against the biasing force, and the joints are relatively rotated in the opposite direction to the engagement of the hook portions. Both joints can be separated by removing.
【００１７】ここで、請求項２記載の構造によれば、両
突出部が互いに当接する面がテーパー面となっているの
で、両継手の相対回転が進むに従って、上記両テーパー
面同士のくさび作用により両フック部同士の係合力が強
められる。According to the second aspect of the present invention, since the surfaces of the protrusions that come into contact with each other are tapered surfaces, the wedge action between the tapered surfaces increases as the relative rotation of the joints progresses. As a result, the engaging force between the hook portions is strengthened.
【００１８】また、請求項３記載の構造では、***作リ
ングを把持することによってすべての圧入部材を同時に
軸方向に移動操作することができる。しかも、この***
作リングに対して各圧入部材は一定範囲内で変位可能で
あるため、各圧入部材と両フック部との相対位置にバラ
ツキがあっても、このバラツキを上記相対変位によって
吸収することができる。Further, in the structure according to the third aspect, by gripping the operated ring, all the press-fitting members can be simultaneously moved and operated in the axial direction. Moreover, since each press-fitting member can be displaced within a certain range with respect to this operated ring, even if there is a variation in the relative position between each press-fitting member and both hook portions, this variation is absorbed by the relative displacement. be able to.
【００１９】また、請求項４記載の構造によれば、フッ
ク部同士の周方向の位置合わせを行わなくても、第２の
フック部の端面（テーパー面）が第１のフック部の端面
（テーパー面）に案内されることにより自動的に第２の
フック部が第１のフック部の間に入り込む。Further, according to the structure of claim 4, the end surface (tapered surface) of the second hook portion is the end surface (taper surface) of the first hook portion (without aligning the hook portions in the circumferential direction). The second hook portion automatically enters between the first hook portions by being guided by the taper surface).
【００２０】また、請求項５記載の構造によれば、一方
の継手に設けられたテーパー状の嵌入穴内に他方の継手
の嵌入部が嵌入された状態で両継手が連結されるので、
この連結状態では、上記嵌入穴のテーパー状内周面及び
嵌入部のテーパー状外周面との圧接で両継手の剛性が高
められる。Further, according to the structure of claim 5, both joints are connected in a state where the fitting portion of the other joint is fitted into the tapered fitting hole provided in the one joint.
In this connected state, the rigidity of both joints is increased by pressure contact with the tapered inner peripheral surface of the fitting hole and the tapered outer peripheral surface of the fitting portion.
【００２１】[0021]
【実施例】本発明の第１実施例を図１，２に基づいて説
明する。なお、図１では各部材を立直させた状態を描い
ているが、本発明では使用中の各部材の方向は問わな
い。また、図３では継手の結合部分を展開した状態を示
している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. Note that FIG. 1 depicts a state in which each member is upright, but in the present invention, the direction of each member in use does not matter. Further, FIG. 3 shows a state where the joint portion of the joint is expanded.
【００２２】図１において、１１，１２は互いに連結さ
れる軸である。この実施例では、地盤改良装置に用いら
れる撹拌軸、すなわち内部にグラウトが通される軸であ
って、グラウト供給管１５，１６をそれぞれ有する管状
の軸１１，１２が示されている。In FIG. 1, 11 and 12 are shafts connected to each other. In this embodiment, agitation shafts used in the ground improvement apparatus, that is, shafts through which grout is passed, and tubular shafts 11 and 12 having grout supply pipes 15 and 16 are shown.
【００２３】一方の軸１１の端部には、筒状の雌継手
（第１の継手）２０が固定されている。この雌継手２０
は、中央に貫通路２４をもつ筒状の継手本体２１を備
え、この継手本体２１の外周面に設けられた軸装着部２
３に上記筒状の軸１１が外篏、固定されるとともに、上
記貫通路２４内に上記軸１１内のグラウト供給管１５が
嵌入、固定されている。継手本体２１の中央部には、上
記軸１１が装着される側と反対の側（図１では下側）に
開口する嵌入穴２５が設けられ、この嵌入穴２５は、開
口に向かうに従って拡径するテーパー状に形成されてい
る。A cylindrical female joint (first joint) 20 is fixed to the end of one shaft 11. This female fitting 20
Includes a tubular joint body 21 having a through passage 24 in the center, and the shaft mounting portion 2 provided on the outer peripheral surface of the joint body 21.
3, the cylindrical shaft 11 is externally fixed and fixed, and the grout supply pipe 15 in the shaft 11 is fitted and fixed in the through passage 24. A fitting hole 25 is provided at the center of the joint body 21 and opens on the side opposite to the side on which the shaft 11 is mounted (lower side in FIG. 1). The fitting hole 25 expands in diameter toward the opening. It is formed in a tapered shape.
【００２４】上記嵌入穴２５の周縁部から下方には、図
３にも示すような第１のフック部２６が延設されてい
る。この第１のフック部２６には、その下端から水平に
近い斜め下方（軸周に対する接線方向と略平行な方向）
に突出する第１の突出部２６ａが形成され、この第１の
フック部２６の下面２６ｂは、第１の突出部２６ａの端
部に向かうに従って低くなるテーパー面とされている。
また、第１の突出部２６ａの上面２６ｃも、上記下面２
６ｂと同方向に傾斜するテーパー面とされている。A first hook portion 26, which is also shown in FIG. 3, is extended downward from the peripheral portion of the fitting hole 25. The first hook portion 26 is obliquely downward and nearly horizontal from the lower end thereof (direction substantially parallel to the tangential direction to the shaft circumference).
The first lower surface 26b of the first hook portion 26 is a tapered surface that becomes lower toward the end of the first protruding portion 26a.
In addition, the upper surface 26c of the first protruding portion 26a is also the lower surface 2
The taper surface is inclined in the same direction as 6b.
【００２５】他方の軸１２の端部には、筒状の雄継手
（第２の継手）３０が固定されている。この雄継手３０
の外周面に設けられた軸装着部３１には、上記軸１２が
外篏、固定されるとともに、この雄継手３０の中央に設
けられた貫通路３２に上記軸１２内のグラウト供給管１
６が接続、固定されている。この雄継手３０において上
記軸１２が装着される側と反対側の端部（図１では上側
端部）には、先端に向かうに従って縮径するテーパー状
の嵌入部３３が形成されており、その形状は上記雌継手
２０における嵌入穴２５に嵌入可能な形状に設定されて
いる。A cylindrical male joint (second joint) 30 is fixed to the end of the other shaft 12. This male joint 30
The shaft 12 is externally fixed and fixed to a shaft mounting portion 31 provided on the outer peripheral surface of the grout supply pipe 1 in the shaft 12 in a through passage 32 provided at the center of the male joint 30.
6 is connected and fixed. A taper-like fitting portion 33 is formed at an end portion (upper end portion in FIG. 1) opposite to the side where the shaft 12 is mounted in the male joint 30, and the tapered fitting portion 33 has a diameter that decreases toward the tip. The shape is set so that it can be fitted into the fitting hole 25 of the female joint 20.
【００２６】この雄継手３０の側壁において、上記嵌入
部３３と嵌入穴２５が嵌合した状態で上記第１のフック
部２６に対応する位置には、図３にも示すように上方に
延びる形状の第２のフック部３６が形成されている。こ
の第２のフック部３６には、その上端から上記第１の突
出部２６ａの突出方向と逆の方向（斜め上方；軸周に対
する接線方向と略平行な方向）に突出する第２の突出部
３６ａが形成され、その幅寸法は第１のフック部２６同
士の離間間隔よりも大きな寸法に設定されている。この
第２のフック部３６の上面３６ｂは、上記第１のフック
部２６の下面２６ｂと同方向、同角度に傾斜するテーパ
ー面とされ、第２の突出部３６ａの下面３６ｃも、上記
上面３６ｂと同方向に傾斜するテーパー面とされてい
る。また、第２のフック部３６において上記第１の突出
部３６ａが形成された側と反対側の側面（以下、背面と
称する。）３６ｄは、下方に向かうに従って広がる方向
の微小角θをもつテーパー面とされている。On the side wall of the male joint 30, a shape extending upward as shown in FIG. 3 is provided at a position corresponding to the first hook portion 26 with the fitting portion 33 and the fitting hole 25 fitted together. Second hook portion 36 is formed. The second hook portion 36 projects from the upper end of the second hook portion 36 in a direction (obliquely upward; a direction substantially parallel to the tangential direction to the shaft circumference) opposite to the protruding direction of the first protrusion 26a. 36a is formed, and its width dimension is set to be larger than the spacing between the first hook portions 26. The upper surface 36b of the second hook portion 36 is a tapered surface that is inclined in the same direction and at the same angle as the lower surface 26b of the first hook portion 26, and the lower surface 36c of the second protruding portion 36a is also the upper surface 36b. The taper surface is inclined in the same direction as. A side surface (hereinafter referred to as a back surface) 36d of the second hook portion 36, which is opposite to the side where the first protruding portion 36a is formed, has a taper having a minute angle θ that widens downward. It is regarded as a face.
【００２７】上記雌継手２０の継手本体２１の外周部に
は、周方向に並ぶ複数の位置（この実施例では４つの位
置）に、長手方向に延びる溝２７が形成され、その外側
が円筒状のキーカバー４０で覆われており、このキーカ
バー４０はその上端が継手本体２１に固定された状態と
なっている。そして、各溝２７内にキー（圧入部材）４
２が昇降可能に収容されている。On the outer peripheral portion of the joint body 21 of the female joint 20, grooves 27 extending in the longitudinal direction are formed at a plurality of positions (four positions in this embodiment) arranged in the circumferential direction, and the outside thereof is cylindrical. The key cover 40 is covered with the key cover 40, and the upper end of the key cover 40 is fixed to the joint body 21. Then, the key (press-fitting member) 4 is inserted in each groove 27.
2 is housed so that it can be raised and lowered.
【００２８】各キー４２の上端には突出部４４が設けら
れ、この突出部４４の外側に圧縮バネ４６が嵌められて
いる。この圧縮バネ４６は、キー４２と溝２７の天壁２
７ａとの間に圧入されている。そして、この圧縮バネ４
６の弾発力とキー４２の自重とによってキー４２が下方
に付勢されている。A projecting portion 44 is provided on the upper end of each key 42, and a compression spring 46 is fitted on the outer side of the projecting portion 44. The compression spring 46 is used for the key 42 and the top wall 2 of the groove 27.
It is press-fitted with 7a. And this compression spring 4
The key 42 is urged downward by the resilience of 6 and the own weight of the key 42.
【００２９】各キー４２及び溝２７の配設位置は、両フ
ック部２６，３６が互いに係合された状態で両フック部
２６，３６同士の間に形成される隙間に対応する位置に
設定されている。各キー４２の下端部において、上記第
２のフック部３６の背面３６ｄと接触する面は、背面３
６ｄと同方向、同角度に傾斜するテーパー面４２ａとさ
れており、キー４２の下端部全体が、上記隙間内に圧入
可能なくさび状端部とされている。また、キー４２の下
面４２ｂは、上記第２のフック部３６の上面３６ｂと同
方向、同角度に傾斜するテーパー面とされている。The positions of the keys 42 and the grooves 27 are set at positions corresponding to the gap formed between the hook portions 26 and 36 in a state where the hook portions 26 and 36 are engaged with each other. ing. At the lower end of each key 42, the surface that comes into contact with the back surface 36d of the second hook portion 36 is the back surface 3
6d has a tapered surface 42a inclined in the same direction and at the same angle, and the entire lower end portion of the key 42 is a wedge-shaped end portion that can be press-fitted into the gap. In addition, the lower surface 42b of the key 42 is a tapered surface that is inclined in the same direction and at the same angle as the upper surface 36b of the second hook portion 36.
【００３０】図１に示すように、キー４２の裏面にはピ
ン４８が突設される一方、各溝２７の周面には、上記ピ
ン４８が嵌入される上下方向の溝２８が形成されてお
り、この溝２８とピン４８との嵌合によって上記キー４
２のストロークが規制されている。具体的には、図３に
示すように、上記キー４２の下端部が相互係合状態にあ
る両フック部２６，３６の隙間内に圧入される圧入位置
と、この圧入位置から上方に逃げる退避位置との間にキ
ー４２のストロークが設定されている。As shown in FIG. 1, a pin 48 is provided on the rear surface of the key 42 while a groove 28 is formed on the peripheral surface of each groove 27 in the vertical direction into which the pin 48 is fitted. The key 4 is fitted by fitting the groove 28 and the pin 48.
2 strokes are regulated. Specifically, as shown in FIG. 3, a press-fitting position in which the lower end of the key 42 is press-fitted into the gap between the hook portions 26 and 36 in the mutually engaged state, and a retracting position that escapes upward from the press-fitting position. The stroke of the key 42 is set between the position and the position.
【００３１】各キー４２外周面上の同じ高さ位置には、
上下方向に幅をもった嵌合溝４９が形成されており、こ
れらの嵌合溝４９内に単一の***作リング５０が嵌入さ
れている。この***作リング５０の幅寸法（図例では上
下寸法）は、上記嵌合溝４９の幅寸法よりもわずかに小
さく設定されており、よって***作リング５０は各キー
４２に対して微小範囲で相対的に上下動可能となってい
る。この***作リング５０の上下方向中央部分には、全
周にわたって延びる凹溝５２が形成され、この凹溝５２
内にクランプ工具等の把持部が嵌入可能となっている。At the same height position on the outer peripheral surface of each key 42,
Fitting grooves 49 having a width in the vertical direction are formed, and a single operated ring 50 is fitted in these fitting grooves 49. The width dimension of the operated ring 50 (vertical dimension in the illustrated example) is set to be slightly smaller than the width dimension of the fitting groove 49, so that the operated ring 50 is within a minute range with respect to each key 42. It can move up and down relatively. A recessed groove 52 extending over the entire circumference is formed in the vertically central portion of the operated ring 50.
A gripping part such as a clamp tool can be fitted therein.
【００３２】次に、この軸継手２０，３０による軸１
１，１２同士の連結要領を説明する。Next, the shaft 1 formed by the shaft couplings 20 and 30.
The procedure for connecting 1 and 12 will be described.
【００３３】まず、第１のフック部２６の下端部を第２
のフック部３６同士の間に挿入するようにしながら、雌
継手２０の嵌入穴２５内に雄継手３０の嵌入部３３を嵌
入する。ここで、上記嵌入穴２５及び嵌入部３３はテー
パー状とされており、嵌入穴２５の入口側内径（図１で
は下側内径）は嵌入部３３の端部側外径（図１では上側
外径）よりも十分大きいので、両者の嵌合は図４〜６に
示した従来構造の継手と比べてはるかに容易に行うこと
ができる。また、この作業時、各キー４２の下面４２ｂ
が第２のフック部３６の上面３６ｂに当接するので、上
記嵌合の進行に伴い、各キー４２は圧縮バネ２７の弾発
力に抗しながら継手本体２１に対して上方へ相対移動
し、退避する。First, the lower end of the first hook portion 26 is
The insertion portion 33 of the male joint 30 is inserted into the insertion hole 25 of the female joint 20 while being inserted between the hook portions 36. Here, the fitting hole 25 and the fitting portion 33 are tapered, and the inner diameter of the fitting hole 25 on the inlet side (lower inner diameter in FIG. 1) is the outer diameter of the fitting portion 33 on the end side (upper outer side in FIG. 1). Since the diameter is sufficiently larger than the diameter, fitting between the two can be performed much more easily than the joint having the conventional structure shown in FIGS. Also, at the time of this work, the lower surface 42b of each key 42
Comes into contact with the upper surface 36b of the second hook portion 36, so that as the above fitting progresses, each key 42 moves upward relative to the joint body 21 while resisting the elastic force of the compression spring 27, evacuate.
【００３４】この嵌入の完了後、もしくは嵌入作業中
に、雄継手３０に対して雌継手２０を図２の時計回り方
向（図３の左方向）に回転させると、第１の突出部２６
ａの端部が第２の突出部３６ａの下側に入り込み、両フ
ック部２６，３６が係合される。これと並行して、第１
のフック部２６と第２のフック部３６の背面３６ｄとの
間に隙間が生じ、この隙間内に、上記第２のフック部３
６の上面３６ｂからキー４２の下端部が滑り落ち、かつ
上記圧縮バネ２７の弾発力によって下方へ圧入される。
ここで、両突出部２６ａ，３６ａが相互接触する面２６
ｃ，３６ｃはテーパー面とされているので、両継手２
０，３０の相対回転が進むに従って両者の圧接力が強め
られるとともに、第２のフック部３６の背面３６ｄとキ
ー４２において背面３６ｄに接触する面４２ａはテーパ
ー面とされているので、キー４２の圧入によるくさび効
果で両フック部２６，３６同士の係合力がさらに強めら
れ、この係合の解除が防がれる。When the female joint 20 is rotated in the clockwise direction in FIG. 2 (leftward in FIG. 3) with respect to the male joint 30 after completion of the fitting or during the fitting operation, the first protruding portion 26 is formed.
The end of a enters into the lower side of the second projecting portion 36a, and the hook portions 26, 36 are engaged. In parallel with this, the first
A gap is formed between the hook portion 26 of the second hook portion 26 and the back surface 36d of the second hook portion 36, and the second hook portion 3 is formed in the gap.
The lower end of the key 42 slides down from the upper surface 36b of 6 and is pressed downward by the elastic force of the compression spring 27.
Here, the surface 26 where the two protrusions 26a and 36a contact each other
Since c and 36c are tapered surfaces, both joints 2
As the relative rotation of 0 and 30 progresses, the pressure contact force between them is strengthened, and the back surface 36d of the second hook portion 36 and the surface 42a of the key 42 that contacts the back surface 36d are tapered surfaces. The wedge effect of the press-fitting further strengthens the engagement force between the hook portions 26 and 36, and prevents the engagement from being released.
【００３５】この連結完了状態では、互いに係合するフ
ック部２６，３６同士の間で、軸方向力（すなわち上下
方向の推進力）が伝達されると同時に、各フック部２
６，３６及びその間に圧入されるキー４２によって、両
継手２０，３０同士間のトルク伝達も行われ、かつフッ
ク部２６，３６同士のがたつきが防がれる。In this connection-completed state, an axial force (that is, a vertical thrust) is transmitted between the hook portions 26 and 36 engaging with each other, and at the same time, each hook portion 2 is engaged.
6,36 and the key 42 press-fitted between them also transmit torque between the joints 20,30 and prevent rattling of the hook portions 26,36.
【００３６】なお、すべてのキー４２の嵌合溝４９には
単一の***作リング５０が外嵌されているが、この***
作リング５０は遊嵌状態にあり、各キー４２は一定の範
囲内で上下方向に相対変位可能となっているので、各キ
ー４２と両フック部２６，３６との相対位置に各キー４
２毎でバラツキがある場合でも、各キー４２は相互独立
してフック部２６，３６同士の隙間内に良好に圧入され
ることとなる。Although a single operated ring 50 is fitted on the fitting grooves 49 of all the keys 42, the operated ring 50 is in a loose fitting state, and each key 42 has a certain range. Since relative displacement is possible in the vertical direction within each key, each key 4 is placed at the relative position between each key 42 and both hook portions 26, 36.
Even if there are variations between the two keys, the respective keys 42 are satisfactorily press-fitted into the gap between the hook portions 26 and 36 independently of each other.
【００３７】次に、両継手２０，３０を切り離す場合に
は、***作リング５０の例えば凹溝５２にクランプ工具
等の把持部を嵌め込み、***作リング５０をつかんでこ
れを強制的に図１の二点鎖線位置まで持ち上げればよ
い。これにより、***作リング５０と嵌合されている各
キー４２はすべて同時に圧縮バネ４６の弾発力に抗して
上方へ移動し、上記圧入位置からこれよりも上方の退避
位置へ逃げる。このようなキー４２の抜取りにより、各
フック部２６，３６同士の間には隙間が生じるので、こ
の状態から両継手２０，３０を上記と逆の方向に相対回
転させることにより、両フック部２６，３６の係合を外
し、雄継手３０の嵌入部３３を雌継手２０の嵌入穴２５
内からから容易に引き抜くことができる。Next, when the joints 20 and 30 are to be separated from each other, a gripping part such as a clamp tool is fitted into the recessed groove 52 of the operated ring 50, and the operated ring 50 is grasped and forcibly fixed. It is enough to lift up to the position of the chain double-dashed line. As a result, all the keys 42 fitted with the operated ring 50 simultaneously move upward against the elastic force of the compression spring 46, and escape from the press-fitting position to a retracted position higher than this. A space is created between the hook portions 26 and 36 due to the removal of the key 42. Therefore, by rotating the joints 20 and 30 relative to each other in the opposite direction from this state, the hook portions 26 and 36 are relatively rotated. , 36 are disengaged, and the fitting portion 33 of the male joint 30 is fitted into the fitting hole 25 of the female joint 20.
It can be easily pulled out from inside.
【００３８】以上のように、この構造によれば、ワンタ
ッチで短時間のうちに軸１１，１２同士の連結及び切離
しを行うことができるとともに、連結状態で確実に軸方
向力及び回転力の伝達を行うことができる。As described above, according to this structure, the shafts 11 and 12 can be connected and disconnected from each other in a short time with one touch, and the axial force and the rotational force can be reliably transmitted in the connected state. It can be performed.
【００３９】なお、本発明はこのような実施例に限定さ
れるものではなく、例として次のような態様を採ること
も可能である。The present invention is not limited to such an embodiment, and the following modes can be adopted as an example.
【００４０】(1) 前記各実施例では、グラウト供給管１
５，１６を備えた二重管構造の軸１１，１２に筒状の継
手２０，３０を装着したものを示したが、軸内部に流体
等を流す必要がない場合には、両継手も筒状のものでな
く、中実のものであってもよい。(1) In each of the above embodiments, the grout supply pipe 1
The joints 20 and 30 having a tubular shape are attached to the shafts 11 and 12 having a double pipe structure including the joints 5 and 16, but when it is not necessary to flow a fluid or the like inside the shafts, both joints are also cylinders. It may be solid rather than solid.
【００４１】(2) 上記実施例では、嵌入穴２５及び嵌入
部３３をテーパー状にしたものを示したが、本発明にお
いて両継手の嵌合構造は特に問わない。ただし、上記テ
ーパー状にすることにより、両継手の嵌合作業をより容
易なものにすることができる。(2) Although the fitting hole 25 and the fitting portion 33 are tapered in the above embodiment, the fitting structure of both joints is not particularly limited in the present invention. However, by making the above-mentioned taper shape, the fitting work of both joints can be made easier.
【００４２】(3) 上記実施例では、上側の軸１１に雌継
手２０を装着したものを示したが、逆にこの軸１１に雄
継手３０を装着するようにしてもよい。(3) In the above embodiment, the female joint 20 is attached to the upper shaft 11, but the male joint 30 may be attached to the shaft 11 conversely.
【００４３】(4) 上記実施例では、各キー４２に遊嵌さ
れた***作リング５０をつかんで各キー４２を強制移動
させるようにしたものを示したが、各キー４２を直接工
具等でつかむようにしてもよいし、各キー４２に***作
リング５０をボルト等で固定するようにしてもよい。た
だし、上記のように***作リング５０をキー４２に遊嵌
すれば、両者の相対変位によって各キー４２の配設位置
のバラツキを吸収することができる利点がある。(4) In the above embodiment, the operated ring 50 loosely fitted to each key 42 is grasped so that each key 42 is forcibly moved. However, each key 42 can be directly moved with a tool or the like. The operated ring 50 may be fixed to each key 42 with a bolt or the like. However, if the operated ring 50 is loosely fitted to the key 42 as described above, there is an advantage that variations in the arrangement positions of the keys 42 can be absorbed by the relative displacement between the two.
【００４４】(5) 上記実施例では、圧縮バネ４６を用い
てキー４２を付勢するものを示したが、図示のようにキ
ー４２を下方に付勢する場合であって、キー４２の重量
が十分な場合には、その自重のみで下方に付勢すること
も可能である。(5) In the above embodiment, the key 42 is biased by using the compression spring 46. However, when the key 42 is biased downward as shown in the drawing, the weight of the key 42 is reduced. If it is sufficient, it is possible to urge downward only by its own weight.
【００４５】(6) 本発明において、上記第１のフック部
２６の下面２６ｂ及び第２のフック部３６の上面３６ｂ
は必ずしもテーパー面でなくてもよいが、前記図３に示
したような方向のテーパー面とすれば、第２のフック部
３６の上面３６ｂに沿って第１のフック部２６の下面２
６ｂが滑ることにより、両者の周方向の位置合わせを行
わなくても、第２のフック部３６同士の間に第１のフッ
ク部２６を自動的に落とし込むことができる効果があ
る。また、図４に示すように、第１のフック部２６の下
面及び第２のフック部３６の上面に山形状の２つのテー
パー面２６ｂ1，２６ｂ2，３６ｂ1，３６ｂ2を形成すれ
ば、第１のフック部２６を第２のフック部３６の左側、
右側のいずれか近い方に案内することが可能になる。(6) In the present invention, the lower surface 26b of the first hook portion 26 and the upper surface 36b of the second hook portion 36.
Is not necessarily a tapered surface, but if it is a tapered surface in the direction as shown in FIG. 3, the lower surface 2 of the first hook portion 26 along the upper surface 36b of the second hook portion 36.
By sliding 6b, there is an effect that the first hook portion 26 can be automatically dropped between the second hook portions 36 without the need to align the both in the circumferential direction. Further, as shown in FIG. 4, by forming two mountain-shaped tapered surfaces 26b 1 , 26b 2 , 36b 1 , 36b 2 on the lower surface of the first hook portion 26 and the upper surface of the second hook portion 36, The first hook portion 26 on the left side of the second hook portion 36,
It will be possible to guide you to the right side, whichever is closer.
【００４６】[0046]
【発明の効果】以上のように本発明は、両継手に互いに
係合するフック部を設け、両フック部が係合された状態
で両フック部同士の隙間に圧入される圧入部材を備えた
ものであるので、両継手同士を嵌合し、かつ両者を相対
回転させるだけのワンタッチの作業で短時間のうちに、
両継手を簡単に連結することができる。しかも、連結完
了状態では両フック部同士の係合によって軸方向力及び
回転力の双方を伝達するとともに、がたつきを防ぐこと
ができ、従来に比して両継手の剛性を高めることができ
る効果がある。As described above, according to the present invention, the joints are provided with the hook portions that engage with each other, and the press-fitting member is provided that is press-fitted into the gap between the hook portions while the hook portions are engaged with each other. Because it is a thing, both joints are fitted together, and the one-touch work of simply rotating both joints in a short time,
Both joints can be easily connected. Moreover, in the connection completed state, both hooks are engaged with each other to transmit both the axial force and the rotational force, and rattling can be prevented, and the rigidity of both joints can be increased as compared with the conventional case. effective.
【００４７】さらに、請求項２記載の構造では、上記相
対回転の際、両突出部のテーパー面同士が圧接すること
により、そのくさび作用で両フック部同士の圧接力をよ
り強め、剛性を高めることができる効果がある。Further, in the structure according to the second aspect of the present invention, during the relative rotation, the tapered surfaces of both the projecting portions are brought into pressure contact with each other, so that the wedge action further strengthens the pressure contact force between the both hook portions, thereby enhancing the rigidity. There is an effect that can be.
【００４８】また、請求項３記載の構造では、***作リ
ングを把持することによってすべての圧入部材を同時に
軸方向に移動操作することができる。しかも、この***
作リングに対して各圧入部材は一定範囲内で変位可能で
あるため、各圧入部材と両フック部との相対位置にバラ
ツキがあっても、このバラツキを上記相対変位によって
吸収することができる効果がある。Further, in the structure according to the third aspect, by gripping the operated ring, all the press-fitting members can be simultaneously moved and operated in the axial direction. Moreover, since each press-fitting member can be displaced within a certain range with respect to this operated ring, even if there is a variation in the relative position between each press-fitting member and both hook portions, this variation is absorbed by the relative displacement. There is an effect that can be.
【００４９】また、請求項４記載の構造によれば、フッ
ク部同士の周方向の位置合わせを行わなくても、第２の
フック部の端面（テーパー面）が第１のフック部の端面
（テーパー面）に案内されることにより自動的に第２の
フック部を第１のフック部の間に入り込ませることがで
き、軸連結作業をより容易にすることができる効果があ
る。Further, according to the structure of claim 4, the end surface (tapered surface) of the second hook portion is the end surface (taper surface) of the first hook portion (without aligning the hook portions in the circumferential direction). By being guided by the taper surface), the second hook portion can be automatically inserted between the first hook portions, which has the effect of facilitating the shaft connecting work.
【００５０】また、請求項５記載の構造によれば、一方
の継手に設けられたテーパー状の嵌入穴内に他方の継手
の嵌入部が嵌入された状態で両継手が連結されるので、
両者の嵌合が容易であり、しかも、この嵌合により雌継
手と雄継手とのがたつきを防ぎ、両軸を正確にかつ安定
して連結してその剛性をより高めることができる効果が
ある。Further, according to the structure of the fifth aspect, since both fittings are connected in a state where the fitting portion of the other fitting is fitted in the tapered fitting hole provided in the one fitting,
It is easy to fit both, and moreover, this fitting prevents rattling of the female joint and the male joint, and the effect of being able to accurately and stably connect both shafts and further increase their rigidity. is there.
【図１】本発明の第１実施例において継手同士を連結し
た状態を示す断面正面図である。FIG. 1 is a sectional front view showing a state in which joints are connected to each other in a first embodiment of the present invention.
【図２】図１のＡ−Ａ線断面図である。FIG. 2 is a sectional view taken along the line AA of FIG.
【図３】上記両継手の連結部分を示す展開図である。FIG. 3 is a development view showing a connecting portion of the both joints.
【図４】上記両継手における両フック部の形状の変形例
を示す展開図である。FIG. 4 is a development view showing a modified example of the shape of both hook portions in the both joints.
【図５】従来のフランジ式軸連結構造の一例を示す一部
断面正面図である。FIG. 5 is a partial cross-sectional front view showing an example of a conventional flange type shaft connecting structure.
【図６】従来のピン通し式軸連結構造の一例を示す断面
正面図である。FIG. 6 is a sectional front view showing an example of a conventional pin-through type shaft connecting structure.
【図７】図６のＢ−Ｂ線断面図である。7 is a cross-sectional view taken along the line BB of FIG.
１１，１２ 軸 １５，１６ グラウト供給管 ２０ 雌継手 ２５ 嵌入穴 ２６ 第１のフック部 ２６ａ 第１の突出部 ３０ 雄継手 ３３ 嵌入部 ３６ 第２のフック部 ３６ａ 第２の突出部 ４２ キー（圧入部材） ５０ ***作リング 11, 12 Shaft 15, 16 Grout supply pipe 20 Female joint 25 Fitting hole 26 First hook portion 26a First protruding portion 30 Male joint 33 Fitting portion 36 Second hook portion 36a Second protruding portion 42 Key (press fit Material) 50 Operated ring
Claims (5)
って、一方の軸の端部に装着される第１の継手と、他方
の軸の端部に装着され、上記第１の継手と嵌合可能な第
２の継手とを備え、上記第１の継手において上記第２の
継手が連結される側の端部に、軸周に対する接線と略平
行な方向に突出する第１の突出部を先端にもつ複数の第
１のフック部を設け、上記第２の継手において上記第１
の継手が連結される側の端部に、上記第１のフック部の
突出部と反対側に突出する第２の突出部を先端に有し、
第１のフック部同士の離間距離よりも小さい幅寸法を有
し、各第１のフック部に係合される第２のフック部を設
けるとともに、上記第１の継手に、上記第２の継手に向
かう方向に付勢され、くさび状端部を有し、上記第１の
フック部と第２のフック部とが係合された状態で上記く
さび状端部が第１のフック部と第２のフック部との間に
上記付勢力で圧入される圧入位置とこの圧入位置よりも
第２の継手から離れた退避位置との間で継手軸方向に移
動可能な複数の圧入部材を設けたことを特徴とする軸継
手構造。1. A shaft joint structure for connecting shafts to each other, wherein a first joint mounted on an end portion of one shaft and a first joint mounted on an end portion of the other shaft. And a second joint that can be fitted to the first joint, and a first protrusion that protrudes in a direction substantially parallel to a tangent to the shaft periphery at an end of the first joint to which the second joint is connected. A plurality of first hook portions each having an end portion are provided, and the first joint in the second joint is provided.
At the end on the side where the joint of is connected, a tip has a second protrusion that protrudes on the opposite side of the protrusion of the first hook,
A second hook portion having a width dimension smaller than the distance between the first hook portions and engaged with each first hook portion is provided, and the first joint is provided with the second joint. Has a wedge-shaped end portion, and the wedge-shaped end portion has a wedge-shaped end portion, and the wedge-shaped end portion has a second hook portion and a second hook portion. A plurality of press-fitting members that are movable in the joint axial direction between a press-fitting position that is press-fitted by the above-mentioned biasing force and a retracted position that is farther from the second fitting than the press-fitting position. Shaft joint structure characterized by.
記両突出部が互いに当接する面をテーパー面としたこと
を特徴とする軸継手構造。2. The shaft joint structure according to claim 1, wherein the surfaces of the protrusions that come into contact with each other are tapered surfaces.
いて、各圧入部材の外周面にこれらの圧入部材に対して
一定範囲内で相対変位可能となるように***作リングを
嵌合したことを特徴とする軸継手構造。3. The shaft coupling structure according to claim 1, wherein an operated ring is fitted on the outer peripheral surface of each press-fitting member so as to be relatively displaceable with respect to these press-fitting members within a certain range. Shaft joint structure characterized by.
構造において、上記第１のフック部が第２の継手に向か
う端面及び第２のフック部が第１の継手に向かう端面
を、第２のフック部を第１のフック部同士の間に案内す
る方向のテーパー面としたことを特徴とする軸継手構
造。4. The shaft joint structure according to claim 1, wherein the first hook portion has an end surface facing the second joint and the second hook portion has an end surface facing the first joint. The shaft coupling structure, wherein the second hook portion is a tapered surface in a direction for guiding the second hook portion between the first hook portions.
構造において、上記第１の継手、第２の継手のいずれか
一方に、上記軸が装着される側と反対側の方向に開口し
かつ開口に向かうに従って拡径するテーパー状の嵌入穴
を設け、他方の継手において上記軸が装着される側と反
対側の側に、かつ上記嵌入穴内に嵌入可能なテーパー状
の嵌入部を設けたことを特徴とする軸継手構造。5. The shaft joint structure according to claim 1, wherein one of the first joint and the second joint is provided in a direction opposite to a side on which the shaft is mounted. A taper-shaped fitting hole that opens and expands in diameter toward the opening is provided, and a tapered fitting portion that can be fitted into the fitting hole is provided on the side of the other joint opposite to the side on which the shaft is mounted. A shaft coupling structure characterized by being provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4196980A JPH0642539A (en) | 1992-07-23 | 1992-07-23 | Shaft coupling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4196980A JPH0642539A (en) | 1992-07-23 | 1992-07-23 | Shaft coupling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0642539A true JPH0642539A (en) | 1994-02-15 |
Family
ID=16366840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4196980A Pending JPH0642539A (en) | 1992-07-23 | 1992-07-23 | Shaft coupling structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0642539A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1018772A (en) * | 1996-03-08 | 1998-01-20 | Tracto Technik Paul Schmidt Mas Fab Gmbh | Soil boring device |
| JPH10169357A (en) * | 1996-12-06 | 1998-06-23 | Toshio Mukai | Connector of soil-removing member for excavator |
| JP2014052164A (en) * | 2012-09-10 | 2014-03-20 | Koyo Thermo System Kk | Heat treatment device |
| CN111305764A (en) * | 2020-04-08 | 2020-06-19 | 聂伟荣 | Fixed shaft sleeve device for bearing on shaft and rotary joint with same |
| CN113914769A (en) * | 2021-10-14 | 2022-01-11 | 周拯 | Drilling acceleration tool with shaft impulse driving torsion |
-
1992
- 1992-07-23 JP JP4196980A patent/JPH0642539A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1018772A (en) * | 1996-03-08 | 1998-01-20 | Tracto Technik Paul Schmidt Mas Fab Gmbh | Soil boring device |
| JPH10169357A (en) * | 1996-12-06 | 1998-06-23 | Toshio Mukai | Connector of soil-removing member for excavator |
| JP2014052164A (en) * | 2012-09-10 | 2014-03-20 | Koyo Thermo System Kk | Heat treatment device |
| CN111305764A (en) * | 2020-04-08 | 2020-06-19 | 聂伟荣 | Fixed shaft sleeve device for bearing on shaft and rotary joint with same |
| CN113914769A (en) * | 2021-10-14 | 2022-01-11 | 周拯 | Drilling acceleration tool with shaft impulse driving torsion |
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