JP3169927U - Underground drilling rig - Google Patents

Underground drilling rig Download PDF

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JP3169927U
JP3169927U JP2011003309U JP2011003309U JP3169927U JP 3169927 U JP3169927 U JP 3169927U JP 2011003309 U JP2011003309 U JP 2011003309U JP 2011003309 U JP2011003309 U JP 2011003309U JP 3169927 U JP3169927 U JP 3169927U
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drive shaft
connection terminal
outer diameter
connector
underground
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親孝 折本
親孝 折本
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株式会社折本設備
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Abstract

【課題】舗装の切り取りや側溝の一部除去のための作業を一部省略することができ、コンパクトで作業性のよい、地中掘削装置を提供する。【解決手段】駆動軸１６の一端に接続端子１８を備え、他端に尖端部２０を備え、駆動軸１６の尖端部２０の近傍に、最大外径がＲ１で、尖端部２０に向かうほど順次外径を縮めるピッチＬ２のスクリューを設けた掘削部２６を備え、駆動軸１６の掘削部２６から接続端子１８に至る部分に、外径Ｒ１で一定のピッチＬ１（Ｌ１＞Ｌ２） のスクリューを設けた搬送部２４を備えた。【選択図】図１Provided is an underground excavation apparatus that can omit part of work for pavement cutting and partial removal of side grooves, is compact, and has good workability. A drive terminal is provided with a connection terminal at one end, a tip 20 at the other end, and the maximum outer diameter is R1 in the vicinity of the tip 20 of the drive shaft and gradually toward the tip. A drilling portion 26 provided with a screw having a pitch L2 for reducing the outer diameter is provided, and a screw having an outer diameter R1 and a constant pitch L1 (L1> L2) is provided in a portion from the drilling portion 26 of the drive shaft 16 to the connection terminal 18. The transport unit 24 is provided. [Selection] Figure 1

Description

本考案は、水道管等を埋設するために地中に孔を掘るための地中掘削装置に関する。   The present invention relates to an underground excavation apparatus for digging a hole in the ground to embed a water pipe or the like.

例えば、道路に埋設された水道本管を分岐して道路沿いの建物に水道管を引き込む場合には、道路の一部と建物の敷地の一部を掘り割り状に掘削して、分岐用の水道管を埋設する。この場合には、道路の舗装を切り取り、道路脇の側溝の一部を除去し、建物の敷地の舗装を切り取る。このために、様々な工具を使用する。   For example, when a water main buried in a road is branched and a water pipe is drawn into a building along the road, a part of the road and a part of the site of the building are excavated in a split shape, Buried water pipes. In this case, the road pavement is cut, a part of the side gutter beside the road is removed, and the pavement of the building site is cut off. Various tools are used for this purpose.

特開２００２−１４６７６１号公報JP 2002-146761 A

既知の従来の技術には、次のような解決すべき課題があった。
水道工事は道路の一部を塞ぐために、道路交通の妨げになる。従って、できるだけ作業を短時間で終えたい。建物の敷地内についても同様である。しかしながら、舗装の切り取りや側溝の一部除去と復旧には、相応の作業量と時間が必要で、時間短縮は容易でない。複雑な掘削工具も紹介されているが、幅員の狭い道路等では作業スペースを確保できない。また、側溝（Ｕ字溝）を一部除去して掘り起こしをした場合には、埋め戻した後の地面を押し固めるための復旧工事が必要になり、作業負荷が大きい。
本考案は以上の点に着目してなされたもので、舗装の切り取りを最小限にし、側溝の一部除去のための作業を省略することができ、コンパクトで作業性のよい、地中掘削装置を提供することを目的とする。 The known prior art has the following problems to be solved.
Waterworks obstruct road traffic because they block parts of the road. Therefore, I want to finish my work in as short a time as possible. The same applies to the building site. However, in order to cut the pavement and to remove and restore a part of the side grooves, a corresponding amount of work and time are required, and it is not easy to shorten the time. Complex drilling tools are also introduced, but work space cannot be secured on narrow roads. In addition, when a part of the side groove (U-shaped groove) is removed and dug up, a restoration work is required to compress the ground after backfilling, and the work load is large.
The present invention has been made paying attention to the above points, minimizing pavement cutting, omitting the work for removing part of the side groove, compact and good workability, underground excavation equipment The purpose is to provide.

以下の構成はそれぞれ上記の課題を解決するための手段である。
〈構成１〉
駆動軸１６の一端に回転機１４を接続するための接続端子１８を備え、他端に尖端部２０を備え、駆動軸１６の尖端部２０の近傍に、最大外径がＲ１で、尖端部２０に向かうほど順次外径を縮めるピッチＬ２のスクリューを設けた掘削部２６を備え、前記駆動軸１６の掘削部２６から前記接続端子１８に至る部分に、外径Ｒ１で一定のピッチＬ１（Ｌ１＞Ｌ２） のスクリューを設けた搬送部２４を備えたことを特徴とする地中掘削装置。 The following configurations are means for solving the above-described problems.
<Configuration 1>
A connecting terminal 18 for connecting the rotating machine 14 is provided at one end of the drive shaft 16, a tip 20 is provided at the other end, and the maximum outer diameter is R 1 and the tip 20 near the tip 20 of the drive shaft 16. A drilling portion 26 provided with a screw having a pitch L2 that gradually reduces the outer diameter as it goes toward is provided, and a constant pitch L1 (L1>) with an outer diameter R1 is provided in a portion from the drilling portion 26 of the drive shaft 16 to the connection terminal 18. The underground excavation apparatus provided with the conveyance part 24 which provided the screw of L2).

〈構成２〉
構成１に記載の地中掘削装置に、その全長を延長するための延長部１３を設けたものであって、前記延長部１３は、一端に回転機１４を接続するための接続端子４０を有し、他端に接続端子４０と連結できるコネクタ３８を有し、駆動軸１６の全長に前記搬送部２４を設けてあることを特徴とする地中掘削装置。 <Configuration 2>
The underground excavation device described in Configuration 1 is provided with an extension portion 13 for extending the entire length thereof, and the extension portion 13 has a connection terminal 40 for connecting the rotating machine 14 at one end. An underground excavation device having a connector 38 that can be connected to the connection terminal 40 at the other end, and the transport portion 24 provided on the entire length of the drive shaft 16.

〈構成３〉
構成２に記載の地中掘削装置において、前記延長部の、前記接続端子４０とコネクタ３８の連結部分において、前記スクリューが切れ目無く連続するように、前記接続端子４０とコネクタ３８の連結位置と連結角度を設定したことを特徴とする地中掘削装置。 <Configuration 3>
In the underground excavation device according to Configuration 2, the connection position of the connection terminal 40 and the connector 38 is connected so that the screw is continuously connected at the connection portion of the extension portion of the connection terminal 40 and the connector 38. An underground excavator characterized by setting an angle.

〈構成４〉
構成３に記載の地中掘削装置において、前記コネクタ３８は、前記駆動軸１６とほぼ同一の外径とされ、前記駆動軸１６を延長するように設けられる前記接続端子４０には、一対のピン４４が設けられ、前記接続端子４０は筒状の前記コネクタ３８にはまり込む外径に選定され、前記コネクタ３８は、軸方向と掘削時の回転方向と逆方向に、前記ピン４４を通過させるＬ字状の切り欠きを備えたことを特徴とする地中掘削装置。 <Configuration 4>
In the underground excavation device according to Configuration 3, the connector 38 has an outer diameter substantially the same as that of the drive shaft 16, and the connection terminal 40 provided to extend the drive shaft 16 has a pair of pins. 44, the connecting terminal 40 is selected to have an outer diameter that fits into the tubular connector 38, and the connector 38 passes through the pin 44 in the axial direction and in the direction opposite to the rotating direction during excavation. An underground excavator characterized by having a letter-shaped notch.

〈構成１の効果〉
尖端部２０と掘削部２６は、最大外径がＲ１で、尖端部２０に向かうほど順次外径を縮めるピッチＬ２のスクリューで、地面３０を掘削する。ピッチが小さく全体としてテーパー状になっているので、土を細かく砕いて掘削できる。搬送部２４は大きなピッチのスクリューで掘削した土砂を後方に排出する。全長を十分に短くできるので、小型軽量で、Ｕ字溝の下側等を掘削するのに適する。
〈構成２の効果〉
掘削する孔の長さが長いときには、延長部１３を接続して、全長を伸ばすことができる。
〈構成３の効果〉
搬送部２４のスクリューが延長部を接続した場合でも切れ目無く連続していると、掘削した土を後方に良好に搬送することができる。
〈構成４の効果〉
連結位置と連結角度を固定して、本体部と延長部を簡単に確実に連結できる。 <Effect of Configuration 1>
The tip portion 20 and the excavation portion 26 excavate the ground 30 with a screw having a maximum outer diameter R1 and a pitch L2 that gradually decreases the outer diameter toward the tip portion 20. Since the pitch is small and tapered as a whole, it is possible to excavate by finely crushing the soil. The transport unit 24 discharges the earth and sand excavated with a screw having a large pitch backward. Since the total length can be made sufficiently short, it is small and light and suitable for excavating the lower side of the U-shaped groove.
<Effect of Configuration 2>
When the length of the hole to be excavated is long, the extension portion 13 can be connected to extend the entire length.
<Effect of Configuration 3>
Even when the screw of the transport part 24 is connected to the extension part, the excavated soil can be transported to the rear satisfactorily if it is continuous without a break.
<Effect of Configuration 4>
By fixing the connection position and the connection angle, the main body and the extension can be easily and reliably connected.

図１（ａ）は地中掘削装置１２の実施例を示す側面図、（ｂ）はその尖端部２０の駆動軸１６を中心に９０度回転した側面図、（ｃ）は掘削時の掘削部２６の作用を説明する側面図である。1A is a side view showing an embodiment of the underground excavator 12, FIG. 1B is a side view rotated 90 degrees around the drive shaft 16 of the tip portion 20, and FIG. 1C is an excavation portion during excavation. FIG. 地中掘削装置１２の使用方法を示す地面の縦断面図である。It is the longitudinal cross-sectional view of the ground which shows the usage method of the underground excavation apparatus. 図３（ａ）は、掘削が進んだ状態の地面の横断面図で、（ｂ）は縦断面図である。3A is a cross-sectional view of the ground in a state where excavation has progressed, and FIG. 3B is a vertical cross-sectional view. 地面３０に明けた孔に保護管３２を挿入した状態を示し、（ａ）は地面の横断面図、（ｂ）は地面の縦断面図である。The state which inserted the protective tube 32 in the hole opened in the ground 30 is shown, (a) is a cross-sectional view of the ground, (b) is a vertical cross-sectional view of the ground. 実施例２の地中掘削装置１２を示す地面の縦断面図である。It is the longitudinal cross-sectional view of the ground which shows the underground excavation apparatus 12 of Example 2. FIG. 本体部と延長部１３とを連結して掘削をしている状態の地面の断面図である。It is sectional drawing of the ground of the state which connected the main-body part and the extension part 13, and is excavating.

以下、本考案の実施の形態を実施例毎に詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail for each example.

図１（ａ）は地中掘削装置１２の実施例を示す側面図、（ｂ）はその尖端部２０の駆動軸１６を中心に９０度回転した側面図、（ｃ）は掘削時の掘削部２６の作用を説明する側面図である。
図に示した地中掘削装置１２は、例えば、全長が１ｍ前後の鋼鉄製のもので構成することができる。駆動軸１６の外径は例えば２ｃｍ程度、中間部のスクリューの外径Ｒ１は例えば５ｃｍ程度のものである。地中掘削装置１２の駆動軸１６の一端は、後で説明する回転機１４を接続するための接続端子１８を備える。また、駆動軸１６の他端は、地面に突き刺すための尖端部２０を備える。 1A is a side view showing an embodiment of the underground excavator 12, FIG. 1B is a side view rotated 90 degrees around the drive shaft 16 of the tip portion 20, and FIG. 1C is an excavation portion during excavation. It is a side view explaining the effect | action of 26. FIG.
The underground excavation device 12 shown in the drawing can be made of steel having a total length of about 1 m, for example. The outer diameter of the drive shaft 16 is, for example, about 2 cm, and the outer diameter R1 of the intermediate screw is, for example, about 5 cm. One end of the drive shaft 16 of the underground excavation device 12 includes a connection terminal 18 for connecting a rotating machine 14 described later. Further, the other end of the drive shaft 16 includes a pointed portion 20 for piercing the ground.

この駆動軸１６の尖端部２０の近傍には、最大外径がＲ１で、尖端部２０に向かうほど順次外径を縮めるピッチＬ２のスクリューを設けた。この部分は地面を掘削する機能を持ち、掘削部２６と呼ぶことにする。一方、駆動軸１６の掘削部２６から接続端子１８に至る部分には、外径Ｒ１で一定のピッチＬ１（Ｌ１＞Ｌ２） のスクリューを設けた。この部分は掘削した土砂を後方に送り、孔径を整える機能を持ち、搬送部２４と呼ぶことにする。   In the vicinity of the tip 20 of the drive shaft 16, a screw having a maximum outer diameter R1 and a pitch L2 that gradually decreases the outer diameter toward the tip 20 is provided. This portion has a function of excavating the ground, and is referred to as an excavation part 26. On the other hand, a screw having an outer diameter R1 and a constant pitch L1 (L1> L2) is provided in a portion from the excavation part 26 of the drive shaft 16 to the connection terminal 18. This portion has a function of feeding the excavated earth and sand backward to adjust the hole diameter, and is referred to as a transport unit 24.

図の（ｂ）に示すように、尖端部２０は、土砂を突き崩す先端形状をしている。掘削部２６は、地面の土を十分に細かく砕く役割をする。細かく砕かれた土は、搬送部２４の回転により後方（接続端子１８の方向）に送られる。搬送部２４のスクリューピッチが掘削部２６のスクリューピッチと等しいと、地中掘削装置１２が丁度ネジ釘のように土中にねじ込まれて、回転が止まってしまう。掘削部２６のスクリューピッチが搬送部２４のものより大きいと、掘削した土砂が十分に細かくならず、搬送部２４で搬送できない。従って、掘削部２６のスクリューピッチが狭い構成が適する。この地中掘削装置１２は、電線管やガス管のように、外径が数センチメートル程度の管類の敷設に適する工具である。   As shown in (b) of the figure, the tip portion 20 has a tip shape that breaks down the earth and sand. The excavation part 26 plays the role which crushes the ground soil sufficiently finely. The finely crushed soil is sent backward (in the direction of the connection terminal 18) by the rotation of the transport unit 24. If the screw pitch of the conveying unit 24 is equal to the screw pitch of the excavating unit 26, the underground excavating device 12 is screwed into the soil just like a screw nail, and the rotation stops. If the screw pitch of the excavation part 26 is larger than that of the transport part 24, the excavated earth and sand will not be sufficiently fine and cannot be transported by the transport part 24. Therefore, a configuration in which the screw pitch of the excavation part 26 is narrow is suitable. The underground excavation device 12 is a tool suitable for laying pipes having an outer diameter of about several centimeters, such as a wire pipe and a gas pipe.

図２は、地中掘削装置１２の使用方法を示す地面の縦断面図である。
図のように、地中掘削装置１２の接続端子１８は、チャックを用いて回転機１４に装着されている。回転機１４は電動モータ等であって、駆動軸１６を回転駆動する。地中掘削装置１２の尖端部２０は、先に説明したように、地面を掘削しながら前進する。掘削部２６は、土砂を細かく粉砕しながら孔径をＲ１まで拡げる。掘削部２６はピッチが小さく全体としてテーパー状になっているので、比較的小さい力で掘削ができる。 FIG. 2 is a longitudinal sectional view of the ground showing how to use the underground excavator 12.
As shown in the figure, the connection terminal 18 of the underground excavation apparatus 12 is attached to the rotating machine 14 using a chuck. The rotating machine 14 is an electric motor or the like, and rotates the drive shaft 16. The tip 20 of the underground excavator 12 advances while excavating the ground as described above. The excavation part 26 expands a hole diameter to R1, crushing earth and sand finely. Since the excavation part 26 has a small pitch and is tapered as a whole, excavation can be performed with a relatively small force.

図３（ａ）は、掘削が進んだ状態の地面の横断面図で、（ｂ）は縦断面図である。
搬送部２４は、大きなピッチＬ１のスクリューで、掘削した土砂を後方に排出する。地面３０にはＵ字溝２８が設置されている。回転機１４により駆動軸１６を回転駆動して、回転機１４を矢印Ａの方向に手で押すことにより、Ｕ字溝２８の下側に掘削孔３６を形成することができる。Ｕ字溝２８を動かす必要はない。 3A is a cross-sectional view of the ground in a state where excavation has progressed, and FIG. 3B is a vertical cross-sectional view.
The conveying unit 24 discharges excavated earth and sand backward with a screw having a large pitch L1. A U-shaped groove 28 is provided on the ground 30. By rotating the drive shaft 16 by the rotating machine 14 and pushing the rotating machine 14 by hand in the direction of arrow A, the excavation hole 36 can be formed below the U-shaped groove 28. There is no need to move the U-shaped groove 28.

図４は、図３のようにして地面３０に明けた孔に保護管３２を挿入した状態を示し、（ａ）は地面の横断面図、（ｂ）は地面の縦断面図である。
図３で掘削した孔に、丁度搬送部２４のスクリュー外径Ｒ１の保護管３２を挿入する。この保護管３２の内部に水道管２１を挿入する。保護管３２は、水道管２１に直接外圧が加わらないようにする保護の役割を果たす。 FIG. 4 shows a state in which the protective tube 32 is inserted into the hole opened in the ground 30 as shown in FIG. 3, where (a) is a cross-sectional view of the ground and (b) is a vertical cross-sectional view of the ground.
In the hole excavated in FIG. 3, the protective tube 32 having the screw outer diameter R1 of the transport unit 24 is inserted. The water pipe 21 is inserted into the protective pipe 32. The protective pipe 32 plays a role of protecting the external pressure from being directly applied to the water pipe 21.

以上のようにすれば、図４（ｂ）に示すように、図の左側から図の右側へ、Ｕ字溝２８を取り外すことなく水道管３２の埋設工事ができる。地中掘削装置１２のスクリューの外径が保護管３２の外径とほぼ等しいものを使用すると、保護管３２を埋設する場所以外の地面３０の掘削をすることなく工事が完了する。従って、周辺の土を押し固めたり埋め戻したりする作業を最小限にすることができる。また、地中掘削装置１２は、全長を十分に短くできるので、小型軽量で、Ｕ字溝の下等を掘削するのに適する。   If it does as mentioned above, as shown in FIG.4 (b), the embedding construction of the water pipe 32 can be performed without removing the U-shaped groove 28 from the left side of a figure to the right side of a figure. If the outer diameter of the screw of the underground excavator 12 is approximately equal to the outer diameter of the protective tube 32, the construction is completed without excavating the ground 30 other than the place where the protective tube 32 is embedded. Accordingly, it is possible to minimize the work of compacting or backfilling the surrounding soil. Moreover, since the underground excavation apparatus 12 can shorten the full length sufficiently, it is small and light, and is suitable for excavation under the U-shaped groove and the like.

図５は実施例２の地中掘削装置１２を示す地面の縦断面図である。
上記の実施例によれば、掘削を開始する側の地面３０を、地中掘削装置１２と回転機１４が収まる程度の長さだけ、掘り下げておく。地中掘削装置１２の長さが長いものにすると、掘り下げておくべき範囲が広くなる。道路の幅員が狭い場合には、掘り下げる範囲が制限される。そこで、図５の実施例のように本体に延長部１３を接続するようにした。 FIG. 5 is a longitudinal sectional view of the ground showing the underground excavation device 12 of the second embodiment.
According to the above-described embodiment, the ground 30 on the side where excavation is started is dug down by a length enough to accommodate the underground excavation device 12 and the rotating machine 14. When the length of the underground excavation device 12 is long, the range to be dug widens. When the width of the road is narrow, the range to dig is limited. Therefore, the extension portion 13 is connected to the main body as in the embodiment of FIG.

図５の実施例では、地中掘削装置１２の接続端子４０を回転機１４に接続可能にするとともに、延長部１３にも接続できるようにする。図５（ａ）は地中掘削装置１２の本体部の実施例側面図である。接続端子４０以外の部分は、図１に示したものと同一である。図５（ｂ）に示すように、最初にこの本体部を回転機１４に接続して、掘削をする。両者は図５（ｃ）に示す構造で連結される。   In the embodiment of FIG. 5, the connection terminal 40 of the underground excavation device 12 can be connected to the rotating machine 14 and can also be connected to the extension portion 13. FIG. 5A is a side view of an embodiment of the main body of the underground excavator 12. Portions other than the connection terminal 40 are the same as those shown in FIG. As shown in FIG.5 (b), this main-body part is first connected to the rotary machine 14, and excavation is carried out. Both are connected by the structure shown in FIG.

図５（ｃ）に示すように、例えば、回転機１４にはコネクタ３８が設けられている。このコネクタ３８には、一対のＬ字状の切り欠き４３が設けられている。このコネクタ３８は、駆動軸１６とほぼ同一の外径になるように設計される。一方、駆動軸１６を延長するように設けられる接続端子４０には、一対のピン４４が設けられている。接続端子４０は筒状のコネクタ３８にはまり込む外径に選定されている。即ち、コネクタ３８は、矢印Ｂ方向（軸方向）と矢印Ｃの方向（掘削時の回転方向と逆方向）にピン４４を通過させるＬ字状の切り欠きを備える。   As shown in FIG. 5C, for example, the rotating machine 14 is provided with a connector 38. The connector 38 is provided with a pair of L-shaped cutouts 43. The connector 38 is designed to have an outer diameter substantially the same as that of the drive shaft 16. On the other hand, the connection terminal 40 provided so as to extend the drive shaft 16 is provided with a pair of pins 44. The connection terminal 40 is selected to have an outer diameter that fits into the cylindrical connector 38. That is, the connector 38 includes an L-shaped notch that allows the pin 44 to pass in the direction of the arrow B (axial direction) and the direction of the arrow C (the direction opposite to the rotation direction during excavation).

接続端子４０を矢印Ｂ方向に移動させて、ピン４４を切り欠き４３に嵌め込む。ピン４４が切り欠き４３の屈折部に突き当たって、矢印Ｂ方向に移動できなくなると、接続端子４０を矢印Ｃの方向に回転させる。これにより、ピン４４は、切り欠き４３の屈折部に挟み込まれて、矢印Ｂと反対方向の力が加わっても、コネクタ３８から抜けなくなる。回転機１４はコネクタ３８を矢印Ｄ方向（掘削時の回転方向）に回転させて掘削をする。本体の駆動軸１６はその回転力を受け、連結を確保したまま回転する。   The connection terminal 40 is moved in the direction of arrow B, and the pin 44 is fitted into the notch 43. When the pin 44 hits the refracting portion of the notch 43 and cannot move in the direction of arrow B, the connection terminal 40 is rotated in the direction of arrow C. As a result, even if the pin 44 is sandwiched between the refracting portions of the notch 43 and a force in the direction opposite to the arrow B is applied, the pin 44 does not come out of the connector 38. The rotating machine 14 performs excavation by rotating the connector 38 in the direction of arrow D (the direction of rotation during excavation). The drive shaft 16 of the main body receives the rotational force and rotates while securing the connection.

図の（ｄ）には、延長部１３の側面図を示す。
この延長部１３は、一端に回転機１４を接続するための接続端子４０を有し、他端に接続端子１８と連結できるコネクタ３８を有する。また、駆動軸１６の全長に搬送部２４を設けてある。搬送部２４は、本体部と同様の外径Ｒ１で一定のピッチＬ１のスクリューを有する。 FIG. 4D shows a side view of the extension 13.
The extension 13 has a connection terminal 40 for connecting the rotating machine 14 at one end, and a connector 38 that can be connected to the connection terminal 18 at the other end. In addition, a transport unit 24 is provided along the entire length of the drive shaft 16. The transport unit 24 has a screw having an outer diameter R1 and a constant pitch L1 similar to the main body unit.

図５（ｅ）は、本体部と延長部１３とを接続した状態の側面図である。
延長部１３の、接続端子４０とコネクタ３８の連結部分において、スクリューが切れ目無く連続している。また、コネクタ３８は、駆動軸１６とほぼ同一の外径になるように設計されているので、駆動軸１６の部分も、長手方向に凹凸なく連結される。これは、接続端子４０とコネクタ３８とが、図５（ｃ）に示すように、一定の連結位置で、一定の連結角度により連結できる構成にしたためである。また、接続端子４０とコネクタ３８とは、図５（ｃ）で説明したとおり連結されるので、掘削時に回転力が伝わり抜けることがない。 FIG. 5E is a side view of the state in which the main body portion and the extension portion 13 are connected.
At the connecting portion of the extension portion 13 between the connection terminal 40 and the connector 38, the screw is continuous. Further, since the connector 38 is designed so as to have substantially the same outer diameter as that of the drive shaft 16, the portion of the drive shaft 16 is also connected without unevenness in the longitudinal direction. This is because the connection terminal 40 and the connector 38 can be coupled at a certain coupling position and at a certain coupling angle as shown in FIG. 5C. Further, since the connection terminal 40 and the connector 38 are coupled as described with reference to FIG. 5C, the rotational force is not transmitted through during excavation.

図６は本体部と延長部１３とを連結して掘削をしている状態の地面の断面図である。
回転機１４を支持して、必要に応じて延長部１３を連結しながら、掘削を進める。このように本体部と延長部１３とを連結すると、搬送部２４が連続して切れ目が無いので、掘削をした土砂を搬送部２４が後方に円滑に搬送する。即ち、途中で土砂が詰まったりすることがない。従って、掘り下げる範囲を最小限にして、所望の長さの孔を掘削することができる。 FIG. 6 is a sectional view of the ground in a state where excavation is performed by connecting the main body portion and the extension portion 13.
Excavation proceeds while supporting the rotating machine 14 and connecting the extension 13 as necessary. When the main body portion and the extension portion 13 are connected in this manner, since the transport unit 24 is continuous and has no break, the transport unit 24 smoothly transports excavated earth and sand backward. That is, there is no clogging of earth and sand on the way. Therefore, it is possible to excavate a hole having a desired length while minimizing the range to be dug down.

１２ 地中掘削装置
１３ 延長部
１４ 回転機
１６ 駆動軸
１８ 接続端子
２０ 尖端部
２１ 水道管
２４ 搬送部
２６ 掘削部
２８ Ｕ字溝
３０ 地面
３２ 保護管
３６ 掘削孔
３８ コネクタ
４０ 接続端子
４３ 切り欠き
４４ ピン DESCRIPTION OF SYMBOLS 12 Underground excavation apparatus 13 Extension part 14 Rotating machine 16 Drive shaft 18 Connection terminal 20 Pointed part 21 Water pipe 24 Transport part 26 Excavation part 28 U-shaped groove 30 Ground 32 Protection pipe 36 Excavation hole 38 Connector 40 Connection terminal 43 Notch 44 pin

Claims (4)

駆動軸１６の一端に回転機１４を接続するための接続端子１８を備え、他端に尖端部２０を備え、
駆動軸１６の尖端部２０の近傍に、最大外径がＲ１で、尖端部２０に向かうほど順次外径を縮めるピッチＬ２のスクリューを設けた掘削部２６を備え、
前記駆動軸１６の掘削部２６から前記接続端子１８に至る部分に、外径Ｒ１で一定のピッチＬ１（Ｌ１＞Ｌ２） のスクリューを設けた搬送部２４を備えたことを特徴とする地中掘削装置。 A connection terminal 18 for connecting the rotating machine 14 to one end of the drive shaft 16 is provided, and a pointed portion 20 is provided to the other end.
In the vicinity of the tip 20 of the drive shaft 16, the maximum outer diameter is R1, and a drilling portion 26 provided with screws with a pitch L2 that gradually decreases the outer diameter toward the tip 20 is provided.
Underground excavation characterized in that a portion of the drive shaft 16 extending from the excavating portion 26 to the connection terminal 18 is provided with a conveying portion 24 provided with a screw having an outer diameter R1 and a constant pitch L1 (L1> L2). apparatus. 請求項１に記載の地中掘削装置に、その全長を延長するための延長部１３を設けたものであって、
前記延長部１３は、一端に回転機１４を接続するための接続端子４０を有し、他端に接続端子４０と連結できるコネクタ３８を有し、駆動軸１６の全長に前記搬送部２４を設けてあることを特徴とする地中掘削装置。 The underground excavation device according to claim 1 is provided with an extension 13 for extending the entire length thereof,
The extension portion 13 has a connection terminal 40 for connecting the rotating machine 14 at one end, a connector 38 that can be connected to the connection terminal 40 at the other end, and the transport portion 24 provided on the entire length of the drive shaft 16. An underground excavator characterized by that. 請求項２に記載の地中掘削装置において、
前記延長部の、前記接続端子４０とコネクタ３８の連結部分において、前記スクリューが切れ目無く連続するように、前記接続端子４０とコネクタ３８の連結位置と連結角度を設定したことを特徴とする地中掘削装置。 The underground excavation device according to claim 2,
The connecting position and the connecting angle of the connecting terminal 40 and the connector 38 are set so that the screw is continuously connected at the connecting portion of the extending portion of the connecting terminal 40 and the connector 38. Drilling rig. 請求項３に記載の地中掘削装置において、
前記コネクタ３８は、前記駆動軸１６とほぼ同一の外径とされ、前記駆動軸１６を延長するように設けられる前記接続端子４０には、一対のピン４４が設けられ、前記接続端子４０は筒状の前記コネクタ３８にはまり込む外径に選定され、前記コネクタ３８は、軸方向と掘削時の回転方向と逆方向に、前記ピン４４を通過させるＬ字状の切り欠きを備えたことを特徴とする地中掘削装置。 The underground excavation device according to claim 3,
The connector 38 has an outer diameter substantially the same as that of the drive shaft 16, and the connection terminal 40 provided to extend the drive shaft 16 is provided with a pair of pins 44. The connector 38 has an L-shaped notch that allows the pin 44 to pass therethrough in the axial direction and in the direction opposite to the rotational direction during excavation. Underground drilling rig.
JP2011003309U 2011-06-14 2011-06-14 Underground drilling rig Expired - Lifetime JP3169927U (en)

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