JPH04189999A - Oval pipe burying device - Google Patents

Abstract

PURPOSE:To bury an oval shaped pipe at a correct attitude by forming each sectional shape of a cutting edge pipe and a leading pipe to an inverted oval shape and excavating the circular part on the large diameter side by a main excavating head and by excavating the circular part on the small diameter side by a subexcavating head. CONSTITUTION:A leading pipe 8 is connected at the top edge side of an oval shaped pipe 1, and a cutting edge pipe 9 is connected in oscillation-enabled form at the top edge of the pipe 8, and each sectional shape of the pipes 8 and 9 is formed to an inverted oval shape. Then, the soil and sand at the top edge ground is excavated by driving a main excavating head 13 installed at the top edge of a screw auger 10 inserted in the pipes 8 and 9 and a driving shaft 14 in the lower part in the cutting edge pipe 9. Then, the soil and sand in the large diameter side circular shaped part of the oval section which is excavated by the head 13 is discharged behind a screw blade 12, and the soil and sand in the small diameter side circular shaped part which is excavated by a head 15 is delivered to the blade 12, and discharged behind. Accordingly, the oval shaped pipe 1 can be easily inserted and buried.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、卵形断面を有する埋設管を地中に埋設するだ
めの卵形管埋設装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an oval-shaped pipe burying device for burying underground pipes having an oval cross section underground.

（従来の技術） 地中に埋設する埋設管として、第４図に断面形状を示す
ように流量か減少しても所要の流速および水嵩を確保し
、土砂や泥の沈澱を防ぐようにした断面卵形の管１（通
称卵形管）かある。(Prior art) As shown in the cross-sectional shape of Fig. 4, the cross-section of a buried pipe buried underground ensures the required flow velocity and water volume even if the flow rate decreases, and prevents sedimentation of earth, sand and mud. There is an egg-shaped tube 1 (commonly known as the oval tube).

このような卵形管１を地中に埋設するには、地表を開削
して埋設するとき上記の作用をなさしめるために尖った
断面側１ａを下側（逆卵形）にして埋設することが必要
である。In order to bury such an egg-shaped tube 1 underground, it should be buried with the pointed cross-sectional side 1a facing downward (inverted oval shape) in order to achieve the above-mentioned effect when excavating the ground surface and burying it. is necessary.

（発明か解決しようとする課題） しかして上記の卵形管１を地中に埋設施工するとき逆卵
形状態として置くことになるため、きわめて不安定な姿
勢となり、作業中に転倒したり、傾いたりして管の埋設
に著しく手間どるという難点かある。(Problem to be Solved by the Invention) However, when the above-mentioned oval tube 1 is buried underground, it is placed in an inverted oval shape, resulting in an extremely unstable posture, which may cause it to fall over during work. The problem is that the pipes tend to tilt, making it extremely time-consuming to bury the pipes.

また、従来の円形管埋設用のホリゾンタルオーガを用い
たのでは、管か卵形断面を有しているため挿入かてきず
、さりとて卵形管１の長径を直径とするオーガで掘削し
たのでは卵形管１の保持ができず、埋設不能になり、こ
れらのことから開削工法に頼らざるを得ないものであっ
た。In addition, if a conventional horizontal auger for burying circular pipes was used, it would not be possible to insert the pipe because it has an oval cross section. The oval tube 1 could not be held, making it impossible to bury it, and for these reasons, it was necessary to rely on the cut-and-cover method.

このような実情から、前述のように大きな利点を有する
卵形管の普及が妨げられる原因となっていた。These circumstances have hindered the spread of oval tubes, which have great advantages as described above.

本発明はこれに鑑み、卵形管をその姿勢を乱すことなく
自動的に埋設することかできる卵形管埋設装置を提供す
ることを目的としてなされたものである。In view of this, it is an object of the present invention to provide an oval-shaped tube embedding device that can automatically bury an oval-shaped tube without disturbing its posture.

（課題を解決するための手段） 上記従来の技術か有する問題点を解決するため本発明は
、先導管の先端に首振り可能に接続され逆卵形断面形状
を有する刃口管と、前記先導管および刃口管内に挿通す
るスクリューオーガの先端に設けられ逆卵形断面の上部
円形部に位置して該円形部相当の地盤を掘削する主掘削
ヘッドと、前記刃口管内下部の駆動軸の先端に設けられ
逆卵形断面の下部円形部に位置して該円形部相当の地盤
を掘削する副掘削ヘッドとを備え、前記スクリューオー
ガのスクリュー翼を前記副掘削ヘッドの背部近傍に延設
したことを特徴とするものである。(Means for Solving the Problems) In order to solve the problems of the above-mentioned conventional techniques, the present invention provides a cutting edge tube which is swingably connected to the tip of a leading tube and has an inverted oval cross section; A main excavation head that is installed at the tip of the screw auger that is inserted into the conduit and the cutting pipe and is located in the upper circular part of the inverted oval cross section and excavates the ground corresponding to the circular part, and a drive shaft located at the lower part of the cutting pipe. A sub-excavating head is provided at the tip and is located in a lower circular part of an inverted egg-shaped cross section to excavate the ground corresponding to the circular part, and the screw blade of the screw auger is extended near the back of the sub-excavating head. It is characterized by this.

（作　用） スクリューオーガおよび駆動軸を回転すると、刃口管先
端に位置する主掘削ヘッドおよび副掘削ヘッドか共に回
転し、先端地盤の土砂か掘削される。主掘削ヘッドによ
り掘削された土砂はスクリュー翼により後方へ送られて
排土され、副掘削ヘッドにより掘削された土砂は前記ス
クリュー翼に受渡されて一緒に後方へ送られる。これに
より主掘削ヘッドで卵形断面の大径側の円形部か、副掘
削ヘッドで小径側の円形部がそれぞれ掘削され、先導管
の後方に続いて押入される卵形管が大きな抵抗を受ける
ことなく埋入することかできる。(Function) When the screw auger and drive shaft are rotated, the main excavation head and sub-excavation head located at the tip of the cutting tube rotate together, and the earth and sand at the tip are excavated. The earth and sand excavated by the main excavation head is sent rearward and discharged by the screw blades, and the earth and sand excavated by the sub-excavation head is delivered to the screw blades and sent rearward together. As a result, the main drilling head excavates the large-diameter circular part of the egg-shaped cross section, and the sub-excavation head excavates the small-diameter circular part, respectively, and the oval pipe that is pushed in after the leading pipe receives great resistance. It can be implanted without any problems.

（実施例） 以下、本発明を図面に示す実施例を？照して説明する。(Example) Hereinafter, examples of the present invention shown in the drawings will be explained. I will refer to and explain.

第１図は本発明による卵形管埋設装置の要部を断面とし
た全体構造の一例を示し、第２図は同要部の拡大断面を
示し、さらに第３図は刃口管部分の正面を示している。Fig. 1 shows an example of the overall structure of the oval tube embedding device according to the present invention, with main parts taken in cross section, Fig. 2 shows an enlarged cross section of the main parts, and Fig. 3 shows a front view of the cutting tube part. It shows.

第１図において、地表から開削された立坑２内の底部に
敷設されるガイドレール３上に駆動部４が進退移動可能
に搭載され、この駆動部４は立坑２内の反力受５との間
に推進シリンダ６が介装されており、この推進シリンダ
６を伸長駆動することにより駆動部４を前進（図におい
て左行）させるようになっている。In FIG. 1, a drive section 4 is mounted on a guide rail 3 laid at the bottom of a shaft 2 excavated from the ground surface so that it can move forward and backward, and this drive section 4 is connected to a reaction force receiver 5 inside the shaft 2. A propulsion cylinder 6 is interposed between them, and by driving the propulsion cylinder 6 to extend, the drive unit 4 is moved forward (leftward in the figure).

この駆動部４の前部には管受部７があって、この管受ロ
アに埋設すべき卵形管１の後端か当接しておかれるよう
になっている。A tube receiving section 7 is provided at the front of the driving section 4, and the rear end of the oval tube 1 to be buried is brought into contact with this lower tube receiving section.

一方、上記卵形管１の先端側には、先導管８か接続され
、この先導管８の先端には刃口管９が首振り可能に接続
されている。On the other hand, a leading tube 8 is connected to the distal end side of the oval tube 1, and a cutting edge tube 9 is swingably connected to the distal end of the leading tube 8.

本発明においては、前記先導管８および刃口管９はその
軸線に直角な断面が逆卵形状を有するもので、この卵形
断面の上部の大径側の円形部の中心にスクリューオーガ
１０が挿通され、このスクリューオーガ１０の先導管８
先端より以降はケーシング１１に挿通されていて、この
ケーシング１１内を通じ掘削土砂をスクリュー翼１２に
より立坑２側へ搬送するようになっている。In the present invention, the guide tube 8 and the cutting edge tube 9 have an inverted oval cross section perpendicular to their axis, and the screw auger 10 is located at the center of the circular portion on the large diameter side at the top of the oval cross section. The leading pipe 8 of this screw auger 10 is inserted through the
The portion beyond the tip is inserted into a casing 11, through which the excavated earth and sand is conveyed to the shaft 2 side by a screw blade 12.

上記スクリューオーガ１０の先端には、刃口管９の先端
に臨む主掘削ヘッド１３が設けられており、逆卵形断面
の上部口形部相当の地盤を掘削するように形成されてい
る。A main excavation head 13 is provided at the tip of the screw auger 10 and faces the tip of the cutting edge tube 9, and is configured to excavate the ground corresponding to the upper mouth portion of the inverted oval cross section.

前記刃口管９の内部下方には駆動軸１４が前後方向に配
設され、この駆動軸１４の先端には、刃口管９の先端に
臨む副層ｎηヘッド１５か設けられており、駆動軸１４
の駆動用モータ１６を駆動することにより副掘削ヘッド
１５て逆卵形断面の下部円形部相当の地盤を掘削するよ
うに形成されている。A drive shaft 14 is disposed in the lower part of the inside of the cutting edge tube 9 in the front-rear direction, and a sub-layer nη head 15 facing the tip of the cutting edge tube 9 is provided at the tip of the driving shaft 14. axis 14
By driving the driving motor 16, the auxiliary excavation head 15 is configured to excavate the ground corresponding to the lower circular portion of the inverted oval cross section.

上記副掘削ヘッド１５の背部の刃口管９内には、前記ケ
ーシング］１の先端に実質的に連なるように前下り傾斜
の誘導板１７が設けられており、この誘導板１７の上方
位置のスクリューオーガ１０にスクリュー翼１２か延在
され、スクリューオーガ］０の先端の主掘削ヘッド１３
に近いスクリュー翼１２は他よりも大径に形成されてい
て、副掘削ヘット１５により掘削された土砂を後方へ誘
導するようになっている。A guide plate 17 is provided in the cutting edge tube 9 at the back of the sub-excavation head 15 and has a forward downward slope so as to be substantially continuous with the tip of the casing 1. A screw blade 12 is extended to the screw auger 10, and a main drilling head 13 at the tip of the screw auger]0
The screw blade 12 closest to the main shaft is formed to have a larger diameter than the other screw blades, and is designed to guide the earth and sand excavated by the sub-excavation head 15 to the rear.

前記刃口管９は先導管８に対し首振り可能とされている
。この首振り機構自体は公知のように先導管８側に固定
された油圧ンヤッキ１８，１８・・・のロッド１８ａ、
１８ａが刃口管９側に連結され、油圧ジヤツキ１８．１
８・・・の選択作動により刃口管９を先導管８に対し首
を振らせ、進路を修正するものであるか、これら油圧ジ
ヤツキ１８．１８・・・はスクリューオーガ１０の軸心
に対する円周上に配置され、この細心を中心として刃口
管９か首を振るようになっている。そして刃口管９の進
路の確認は、立坑２側から管内を通してトランシット監
視、レーザ光によるチエツク等により行なわれる。The cutting edge tube 9 can be swung relative to the leading tube 8. As is well known, this swinging mechanism itself includes rods 18a of hydraulic jacks 18, 18, . . . fixed to the leading pipe 8 side,
18a is connected to the cutting edge tube 9 side, and the hydraulic jack 18.1
8... are used to swing the cutting edge tube 9 relative to the leading tube 8 to correct the course, or these hydraulic jacks 18, 18... are arranged in a circle relative to the axis of the screw auger 10 They are arranged around the circumference, and the blade mouth tube 9 swings its head around this fine point. The course of the cutting edge pipe 9 is confirmed by passing through the pipe from the vertical shaft 2 side by monitoring transit, checking with a laser beam, etc.

図示の実施例では、駆動部４の押圧力か卵形管ｌに加わ
らないよう卵形管１と先導管８との接合部付近において
、ケーシング１］の外周と先導管８の後端近くの内周に
互いに当接する押圧部材］９．２０が設置すられ、ケー
シング］１を押す二とにより先導管８に押圧力か作用す
るようになされている。In the illustrated embodiment, the outer periphery of the casing 1 and the rear end of the leading tube 8 are placed near the joint between the egg-shaped tube 1 and the leading tube 8 so that the pressing force of the drive unit 4 is not applied to the egg-shaped tube 1. Pressing members 9 and 20 that abut each other on the inner periphery are installed so that a pressing force is applied to the leading pipe 8 by pressing the casing 1 and 2 .

つぎに上記実施例の作用を説明する。Next, the operation of the above embodiment will be explained.

第１図示のように駆動部４を後退させておき、その管受
部７に卵形管１を尖端が下側（逆卵形）になるようにセ
ットし、先方の刃口管９を地中に向けてでソトしたのち
スクリューオーガ１０および駆動軸１４を回転駆動する
と、先端地盤が主掘削ヘッド１３および副掘削ヘッド１
５により掘削される。As shown in Figure 1, the drive unit 4 is moved backward, and the oval tube 1 is set in the tube holder 7 with the tip facing downward (inverted oval shape), and the cutting edge tube 9 at the front is placed on the bottom. When the screw auger 10 and the drive shaft 14 are rotated after soiling inward, the tip of the ground becomes the main excavation head 13 and the sub-excavation head 1.
Excavated by 5.

掘削された土砂は、各ヘッド１３．１５の周囲乃至はヘ
ッド１３．１５の基板１３ａ、１５ａにあけられた孔を
通じて背部側へ取込まれ、主掘削ヘッド１３からの土砂
はスクリュー翼１２によって後方へ送られ、ケーシング
１１内を通して立坑２から地上へ搬出される。また副掘
削ヘッド１５からの土砂は、上記スクリュー翼１２によ
って後送される土砂に混り、これと共に誘導板１７にそ
って上方へ搬送され、同じくケーシング１１内を通じて
後方へ送られる。The excavated earth and sand are taken in to the back side through holes made around each head 13.15 or in the substrates 13a and 15a of the heads 13.15, and the earth and sand from the main excavation head 13 is taken in to the rear side by the screw blades 12. It passes through the casing 11 and is carried out from the shaft 2 to the ground. Further, the earth and sand from the sub-excavation head 15 is mixed with the earth and sand that is sent backward by the screw blades 12, and is conveyed upward along the guide plate 17 together with the earth and sand, and is also sent rearward through the inside of the casing 11.

掘削排土の進行と同時に推進シリンダ６を作動させて駆
動部４を前進させ、卵形管１を押圧して地中に埋入して
行く。このとき刃口管９および先導管８が進んだあとに
形成される掘削孔は逆卵形断面を有しかつ卵形管１の外
形とはゾ等しい大きさに掘削されるので、押入される卵
形管１がぐらついたり傾くようなことがない。Simultaneously with the progress of excavation and removal, the propulsion cylinder 6 is activated to move the drive unit 4 forward, pressing the oval tube 1 and burying it into the ground. At this time, the excavated hole that is formed after the cutting edge tube 9 and the leading tube 8 advance has an inverted oval cross section and is excavated to a size equal to the outer diameter of the oval tube 1, so that it can be pushed into the hole. The oval tube 1 does not wobble or tilt.

１本の卵形管１を押入し終ったときは駆動部４を再び後
退させ、その管受部７と埋入済の卵形管１との間に新た
な卵形管１を吊り込み、この卵形管１、スクリューオー
ガ１０．ケーシング１１等の部品を継ぎ足して前記と同
様な掘削作業を行なうことにより、卵形管１を所定の距
離にわたって埋設することかできる。When one egg-shaped tube 1 has been inserted, the drive unit 4 is moved back again, and a new egg-shaped tube 1 is suspended between the tube receiving portion 7 and the inserted egg-shaped tube 1. This oval tube 1, screw auger 10. By adding parts such as the casing 11 and performing the same excavation work as described above, the oval tube 1 can be buried over a predetermined distance.

なお図示実施例では、主掘削ヘット〕３と副掘削ヘッド
〕５とを同一面内に配置した場合について示しており、
したかって両ヘッド１３．１５による掘削段階では第３
図に符号Ａ、Ａで示す部分に掘残しが出るが、これは刃
口管９の前進時に刃口管９の先端縁で切り崩され、刃口
管９内に取込まれるので支障はない。しかしこのプツト
スペースＡ、Ａを少なくするため主掘削ヘッド１３と副
掘削へラド１５とを前後に若干位置をずらし、前面より
みて一部がラップするように配置するようにしてもよい
。また駆動軸１４の駆動源をスクリューオーガ１０の駆
動源とは別に設けた場合について示したが、スクリュー
オーガ１０からチェノ等の伝導部材により回転を取出し
て駆動軸１４を従動させるようにしてもよい。そして埋
設管の断面は完全な卵形でなく、長円形、楕円状のもの
であっても本発明の技術思想を適用し得ることはもちろ
んである。The illustrated embodiment shows a case where the main excavation head] 3 and the sub-excavation head] 5 are arranged in the same plane.
Therefore, in the excavation stage with both heads 13.15, the third
Although there will be uncut parts in the parts indicated by symbols A and A in the figure, this will not be a problem as it will be broken down by the tip edge of the cutting edge tube 9 as the cutting edge tube 9 moves forward and will be taken into the cutting edge tube 9. . However, in order to reduce the put spaces A and A, the main excavating head 13 and the sub-excavating rad 15 may be slightly shifted back and forth and arranged so that they partially overlap when viewed from the front. Further, although the case is shown in which the drive source for the drive shaft 14 is provided separately from the drive source for the screw auger 10, the drive shaft 14 may be driven by taking out rotation from the screw auger 10 using a transmission member such as a chino. . It goes without saying that the technical idea of the present invention can be applied even if the buried pipe has an oval or elliptical cross section, rather than a perfect oval shape.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、刃口管および先導
管の断面形状を逆卵形とし、その大径側の円形部を主掘
削ヘッドで、小径側の円形部を副掘削ヘッドで掘削する
ようにしたので、卵形管を地中に自動的に押入埋設する
ことができ、埋設時に卵形管か傾くこともなく、正しい
姿勢に埋設することができる。As explained above, according to the present invention, the cross-sectional shape of the cutting pipe and the leading pipe is inverted oval, and the circular part on the large diameter side is excavated by the main excavation head, and the circular part on the small diameter side is excavated by the sub excavation head. As a result, the oval tube can be automatically pushed and buried in the ground, and the oval tube can be buried in the correct posture without tilting during burial.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例を示す要部を断面とした側面
図、第２図は同要部の拡大断面図、第３図は同正面図、
第４図は卵形管の断面図である。 １・・・卵形管、４・・・駆動部、６・・・推進シリン
ダ、８・・・先導管、９・・・刃口管、１０・・・スク
リューオーガ、１１・・・ケーシング、１２・・・スク
リュー翼、１３・・・主掘削ヘッド、１４・・・駆動軸
、１５・・副掘削ヘッド、］７・・・誘導板。 出願人代理人　　佐　　藤　　−雄 第３図 第４図Fig. 1 is a side view showing an embodiment of the present invention, with the main part taken as a cross section, Fig. 2 is an enlarged sectional view of the main part, and Fig. 3 is a front view of the same.
FIG. 4 is a cross-sectional view of the oval tube. DESCRIPTION OF SYMBOLS 1... Oval tube, 4... Drive part, 6... Propulsion cylinder, 8... Leading pipe, 9... Edge tube, 10... Screw auger, 11... Casing, 12... Screw blade, 13... Main excavation head, 14... Drive shaft, 15... Sub-excavation head,] 7... Guide plate. Applicant's agent Mr. Sato Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 先導管の先端に首振り可能に接続され逆卵形断面形状を
有する刃口管と、前記先導管および刃口管内に挿通する
スクリューオーガの先端に設けられ逆卵形断面の上部円
形部に位置して該円形部相当の地盤を掘削する主掘削ヘ
ッドと、前記刃口管内下部の駆動軸の先端に設けられ逆
卵形断面の下部円形部に位置して該円形部相当の地盤を
掘削する副掘削ヘッドとを備え、前記スクリューオーガ
のスクリュー翼を前記副掘削ヘッドの背部近傍に延設し
たことを特徴とする卵形管埋設装置。A blade opening tube that is swingably connected to the tip of the leading tube and has an inverted oval cross-sectional shape, and is provided at the tip of a screw auger that is inserted into the leading tube and the cutting edge tube, and is located in the upper circular part of the inverted oval cross section. a main excavation head that excavates the ground corresponding to the circular portion; and a main excavation head that is provided at the tip of the drive shaft in the lower part of the cutting pipe and is located in the lower circular portion of the inverted oval cross section and excavates the ground corresponding to the circular portion. 1. A sub-excavation head, and a screw blade of the screw auger extends near the back of the sub-excavation head.