JP6953044B2

JP6953044B2 - Impact drill used for pile foundation work

Info

Publication number: JP6953044B2
Application number: JP2021000195A
Authority: JP
Inventors: 春来陳; 炯韜李; 挺王; 剣英余; 萍朱; 朋金宋
Original assignee: Zhejiang University City College ZUCC
Current assignee: Zhejiang University City College ZUCC
Priority date: 2020-03-05
Filing date: 2021-01-04
Publication date: 2021-10-27
Anticipated expiration: 2041-01-04
Also published as: CN111101849A; CN111101849B; JP2021139276A

Description

本発明は、杭基礎工事で地盤を掘削するために使用する衝撃ドリルに関する。 The present invention relates to an impact drill used for excavating the ground in pile foundation work.

杭基礎工事では、ワイヤーを利用して衝撃ドリルを持ち上げたあと、重力によって衝撃ドリルを落下させる際の衝撃によって地盤を粉砕し、地盤を掘削する方法が知られている。
この衝撃ドリルは、あらゆる地盤状態でも使用できるため多く利用されているが、掘削効率を高めるためには、地盤の粉砕と同時に、粉砕されて細かくなった土や砂などの破砕物を排出し、土砂が堆積するのを防ぐ必要がある。
そこで、特許文献１には、ドリルの周囲にスクリューが設けられ、このスクリューがドリルとともに回転することで、粉砕と同時に、破砕物を排出できる穿孔装置が開示されている。 In pile foundation work, there is known a method of excavating the ground by lifting the impact drill using a wire and then crushing the ground by the impact when the impact drill is dropped by gravity.
This impact drill is widely used because it can be used in all ground conditions, but in order to improve excavation efficiency, at the same time as crushing the ground, crushed materials such as soil and sand that have been crushed are discharged. It is necessary to prevent sediment from accumulating.
Therefore, Patent Document 1 discloses a drilling device in which a screw is provided around a drill, and the screw rotates together with the drill to discharge crushed material at the same time as crushing.

特開2014-001496公報Japanese Unexamined Patent Publication No. 2014-001496

しかし、掘削した地盤の底部に、破砕物が沈殿することがあり、特に、土は、泥水の中で浮遊できずに沈殿してしまうことが多いが、この場合、沈殿した破砕物が、衝撃を減衰させ、掘削効率を大きく下げてしまうことが知られている。
そのため、掘削した地盤の底部に、継続して大きな衝撃を与え続けるためには、破砕、掘削と同時に、沈殿した破砕物を掻き出したり、負圧で吸い上げたりできるように、破砕物を沈殿させず、泥水の中に浮遊させる必要がある。 However, crushed material may settle at the bottom of the excavated ground, and in particular, soil often cannot float in muddy water and settles. In this case, the settled crushed material gives an impact. It is known that the excavation efficiency is greatly reduced by attenuating.
Therefore, in order to continuously give a large impact to the bottom of the excavated ground, the crushed material is not settled so that the settled crushed material can be scraped out or sucked up with negative pressure at the same time as crushing and excavation. , Need to float in muddy water.

そこで、本発明は、前記の課題を解決するために、杭基礎工事で地盤を掘削するために使用する衝撃ドリルを提供する。 Therefore, the present invention provides an impact drill used for excavating the ground in pile foundation work in order to solve the above-mentioned problems.

従来技術における問題点を解決するために、本発明は、以下の技術的な解決策を講じている。
なお、本発明の説明において、「内」、「下」、「上」など方位と位置関係を指示する用語は、図面に示される方位や作業中によく置く方位、位置関係に基づくものである。
また、方向または位置関係は、本発明を説明し、説明を簡略化するためのものであり、参照されるデバイスまたは要素が特定の方向を有し、特定の方向で構築または操作されなければならないことを示したり示唆したりするものではない。
さらに、「第１」、「第２」などの用語は、説明を区別するためにのみ使用され、相対的な重要性を示したり、暗示することを意味するものではない。 In order to solve the problems in the prior art, the present invention takes the following technical solutions.
In the description of the present invention, terms such as "inside", "down", and "up" that indicate the orientation and the positional relationship are based on the orientation shown in the drawing, the orientation often placed during work, and the positional relationship. ..
In addition, the direction or positional relationship is for explaining the present invention and simplifying the description, and the referenced device or element must have a specific direction and be constructed or operated in a specific direction. It does not indicate or suggest that.
Furthermore, terms such as "first" and "second" are used only to distinguish the explanations and do not mean to indicate or imply relative importance.

本発明にかかる杭基礎工事に用いる衝撃ドリルは、
先端に弧状のアーチプレートが形成された、底面に向かって末広がりの形状の三角板を有するドリルロッドと、
ドリルロッドを牽引するロープを取り付けるフックと、
ドリルロッドの底面に取り付けられ、十字状の取付板と、その先端にアーチプレートと同じ長さの弧状の円弧板からなる衝撃部と、
から構成され、
ドリルロッドには、中心軸に沿って形成された貫通孔に、
上端に、スライドフックが取り付けられ、螺旋溝が形成された回転筒に嵌合した状態で、螺旋状の凸部が形成されたロッドが収容され、
ロッドの下端部には、六角柱が立設する衝撃部に連結する取付カバー、締付カバー、回転筒が取り付けられており、
非牽引状態では、三角板の下端面と、十字状の取付板とが重ね合わされているが、
スライドフックを牽引して、ロッドを鉛直上方向に持ち上げることで、
ロッドが鉛直上方向に移動するのに合わせて回転筒が回転し、さらに衝撃部が回転して、衝撃部の取付板の天面が露出して、
地盤の底に沈殿した土砂が取付板によって掬い上げられて、地盤を掘削しやすい状態にし、
スライドフックの牽引をやめると、ロッドが鉛直下方向に落下することで、
ロッドが鉛直下方向に移動するのに合わせて回転筒が逆回転し、さらに衝撃部が逆回転して、衝撃部の取付板が三角板の下端面と一致して、
衝撃ドリルを地盤に打ち付けたときに衝撃ドリルの地盤への衝撃を増加させる
ことを特徴とする。 The impact drill used for the pile foundation work according to the present invention is
A drill rod with an arc-shaped arch plate formed at the tip and a triangular plate with a shape that spreads toward the bottom.
A hook to attach the rope that pulls the drill rod,
An impact part that is attached to the bottom of the drill rod and consists of a cross-shaped mounting plate and an arc-shaped arc plate of the same length as the arch plate at the tip.
Consists of
The drill rod has a through hole formed along the central axis,
A slide hook is attached to the upper end, and a rod with a spiral convex portion is housed in a state of being fitted into a rotary cylinder having a spiral groove formed.
At the lower end of the rod, a mounting cover, a tightening cover, and a rotating cylinder that connect to the impact part where the hexagonal column stands are attached.
In the non-traction state, the lower end surface of the triangular plate and the cross-shaped mounting plate are overlapped,
By pulling the slide hook and lifting the rod vertically upward,
As the rod moves vertically upward, the rotating cylinder rotates, and the impact part rotates, exposing the top surface of the mounting plate of the impact part.
Sediment that has settled on the bottom of the ground is scooped up by the mounting plate, making it easier to excavate the ground.
When you stop pulling the slide hook, the rod will fall vertically downward,
As the rod moves vertically downward, the rotating cylinder rotates in the reverse direction, and the impact part rotates in the reverse direction, so that the mounting plate of the impact part coincides with the lower end surface of the triangular plate.
It is characterized by increasing the impact of the impact drill on the ground when the impact drill is struck on the ground.

本発明にかかる杭基礎工事に用いる衝撃ドリルは、
先端に弧状のアーチプレートが形成された、底面に向かって末広がりの形状の三角板を有するドリルロッドと、
ドリルロッドを牽引するロープを取り付けるフックと、
ドリルロッドの底面に取り付けられ、十字状の取付板と、その先端にアーチプレートと同じ長さの弧状の円弧板からなる衝撃部と、
から構成され、
ドリルロッドには、中心軸に沿って形成された貫通孔に、
上端に、スライドフックが取り付けられ、螺旋溝が形成された回転筒に嵌合した状態で、螺旋状の凸部が形成されたロッドが収容され、
ロッドの下端部には、六角柱を有する衝撃部に連結する取付カバー、締付カバー、回転筒が取り付けられ、
衝撃部は、回転してもドリルロッドから外れることなくアーチプレートを保護するために、
ドリルロッドのアーチプレートに重なるように、アーチプレートの外周側に円弧板が配置され、
円弧板のガイドブロック溝にドリルロッドのガイドブロックが嵌合された状態で、ガイドブロックの上端面からガイドプレートによって押さえられており、
非牽引状態では、三角板の下端面と、十字状の取付板とが重ね合わされているが、
スライドフックを牽引して、ロッドを鉛直上方向に持ち上げることで、
ロッドが鉛直上方向に移動するのに合わせて回転筒が回転し、さらに衝撃部が回転して、衝撃部の取付板の天面が露出して、
地盤の底に沈殿した土砂が取付板によって掬い上げられて、地盤を掘削しやすい状態にし、
スライドフックの牽引をやめると、ロッドが鉛直下方向に落下することで、
ロッドが鉛直下方向に移動するのに合わせて回転筒が逆回転し、さらに衝撃部が逆回転して、衝撃部の取付板が三角板の下端面と一致して、
衝撃ドリルを地盤に打ち付けたときに衝撃ドリルの地盤への衝撃を増加させる
ことを特徴とする。 The impact drill used for the pile foundation work according to the present invention is
A drill rod with an arc-shaped arch plate formed at the tip and a triangular plate with a shape that spreads toward the bottom.
A hook to attach the rope that pulls the drill rod,
An impact part that is attached to the bottom of the drill rod and consists of a cross-shaped mounting plate and an arc-shaped arc plate of the same length as the arch plate at the tip.
Consists of
The drill rod has a through hole formed along the central axis,
A slide hook is attached to the upper end, and a rod with a spiral convex portion is housed in a state of being fitted into a rotary cylinder having a spiral groove formed.
A mounting cover, a tightening cover, and a rotary cylinder connected to an impact portion having a hexagonal column are attached to the lower end of the rod.
The impact part protects the arch plate without coming off the drill rod even when it rotates.
An arc plate is placed on the outer peripheral side of the arch plate so as to overlap the arch plate of the drill rod.
With the guide block of the drill rod fitted in the guide block groove of the arc plate, it is pressed by the guide plate from the upper end surface of the guide block.
In the non-traction state, the lower end surface of the triangular plate and the cross-shaped mounting plate are overlapped,
By pulling the slide hook and lifting the rod vertically upward,
As the rod moves vertically upward, the rotating cylinder rotates, and the impact part rotates, exposing the top surface of the mounting plate of the impact part.
Sediment that has settled on the bottom of the ground is scooped up by the mounting plate, making it easier to excavate the ground.
When you stop pulling the slide hook, the rod will fall vertically downward,
As the rod moves vertically downward, the rotating cylinder rotates in the reverse direction, and the impact part rotates in the reverse direction, so that the mounting plate of the impact part coincides with the lower end surface of the triangular plate.
It is characterized by increasing the impact of the impact drill on the ground when the impact drill is struck on the ground.

本発明にかかる杭基礎工事に用いる衝撃ドリルは、
先端に弧状のアーチプレートが形成された、底面に向かって末広がりの形状の三角板を有するドリルロッドと、
ドリルロッドを牽引するロープを取り付けるフックと、
ドリルロッドの底面に取り付けられ、十字状の取付板と、その先端にアーチプレートと同じ長さの弧状の円弧板からなる衝撃部と、
から構成され、
ドリルロッドには、中心軸に沿って形成された貫通孔に、
上端に、スライドフックが取り付けられ、螺旋溝が形成された回転筒に嵌合した状態で、螺旋状の凸部が形成されたロッドが収容され、
ロッドの下端部には、六角柱を有する衝撃部に連結する取付カバー、締付カバー、回転筒が取り付けられ、
取付カバーに、上下に貫通する複数の第２泥抜孔が、周方向に等間隔に形成され、
衝撃部の十字状の取付板に、上下に貫通する複数の第１泥抜孔が、第２泥抜孔と一致する位置に形成され、
第１泥抜孔と第２泥抜孔が連通していることで、六角柱を収めた取付カバーの六角孔の上方の空間に侵入した泥水を排出することができ、
衝撃部は、ドリルロッドのアーチプレートに重なるように、アーチプレートの外周側に円弧板が配置され、
円弧板のガイドブロック溝にドリルロッドのガイドブロックが嵌合された状態で、ガイドブロックの上端面からガイドプレートによって押さえられていることで、
衝撃部が回転してもドリルロッドから外れることなくアーチプレートを保護することができ、
非牽引状態では、三角板の下端面と、十字状の取付板とが重ね合わされているが、
スライドフックを牽引して、ロッドを鉛直上方向に持ち上げることで、
ロッドが鉛直上方向に移動するのに合わせて回転筒が回転し、さらに衝撃部が回転して、衝撃部の取付板の天面が露出して、
地盤の底に沈殿した土砂が取付板によって掬い上げられて、地盤を掘削しやすい状態にし、
スライドフックの牽引をやめると、ロッドが鉛直下方向に落下することで、
ロッドが鉛直下方向に移動するのに合わせて回転筒が逆回転し、さらに衝撃部が逆回転して、衝撃部の取付板が三角板の下端面と一致して、
衝撃ドリルを地盤に打ち付けたときに衝撃ドリルの地盤への衝撃を増加させる
ことを特徴とする。 The impact drill used for the pile foundation work according to the present invention is
A drill rod with an arc-shaped arch plate formed at the tip and a triangular plate with a shape that spreads toward the bottom.
A hook to attach the rope that pulls the drill rod,
An impact part that is attached to the bottom of the drill rod and consists of a cross-shaped mounting plate and an arc-shaped arc plate of the same length as the arch plate at the tip.
Consists of
The drill rod has a through hole formed along the central axis,
A slide hook is attached to the upper end, and a rod with a spiral convex portion is housed in a state of being fitted into a rotary cylinder having a spiral groove formed.
A mounting cover, a tightening cover, and a rotary cylinder connected to an impact portion having a hexagonal column are attached to the lower end of the rod.
A plurality of second mud removal holes penetrating vertically are formed in the mounting cover at equal intervals in the circumferential direction.
A plurality of first mud removal holes penetrating vertically are formed on the cross-shaped mounting plate of the impact portion at positions corresponding to the second mud removal holes.
By communicating the first mud removal hole and the second mud removal hole, it is possible to discharge the muddy water that has entered the space above the hexagonal hole of the mounting cover containing the hexagonal column.
An arc plate is arranged on the outer peripheral side of the arch plate so that the impact portion overlaps the arch plate of the drill rod.
With the guide block of the drill rod fitted in the guide block groove of the arc plate, it is pressed by the guide plate from the upper end surface of the guide block.
Even if the impact part rotates, the arch plate can be protected without coming off the drill rod,
In the non-traction state, the lower end surface of the triangular plate and the cross-shaped mounting plate are overlapped,
By pulling the slide hook and lifting the rod vertically upward,
As the rod moves vertically upward, the rotating cylinder rotates, and the impact part rotates, exposing the top surface of the mounting plate of the impact part.
Sediment that has settled on the bottom of the ground is scooped up by the mounting plate, making it easier to excavate the ground.
When you stop pulling the slide hook, the rod will fall vertically downward,
As the rod moves vertically downward, the rotating cylinder rotates in the reverse direction, and the impact part rotates in the reverse direction, so that the mounting plate of the impact part coincides with the lower end surface of the triangular plate.
It is characterized by increasing the impact of the impact drill on the ground when the impact drill is struck on the ground.

従来の衝撃ドリルと比較した有益な効果は、次のとおりである。 The beneficial effects compared to conventional impact drills are:

１）衝撃ドリルが重力によって落下する時、衝撃部の取付板と円弧板が、ドリルロッドの三角板と十字状に重なった状態になっており、公知の衝撃ドリルと同じで、衝撃部の衝撃力がドリルロッドに伝達され、衝撃部の損傷を軽減することができる。 1) When the impact drill falls due to gravity, the mounting plate and arc plate of the impact part are in a state of overlapping with the triangular plate of the drill rod in a cross shape, which is the same as the known impact drill, and the impact force of the impact part. Is transmitted to the drill rod, and damage to the impact portion can be reduced.

２）衝撃ドリルがロープに引っ張られて持ち上げられた時、衝撃部がドリルロッドに対して回転することで、衝撃部の取付板と円弧板が、ドリルロッドの三角板の下端と交差し、十字状から米字状になる。これにより、衝撃部が一部の土砂を取付板の上側に載せ、衝撃ドリルが持ち上げられた時、取付板に載せられた土砂も一緒に持ち上げられることで、土砂の排出効率を向上させることができる。 2) When the impact drill is pulled by the rope and lifted, the impact portion rotates with respect to the drill rod, so that the mounting plate and arc plate of the impact portion intersect the lower end of the triangular plate of the drill rod, forming a cross shape. Becomes a rice character. As a result, when the impact part puts a part of the earth and sand on the upper side of the mounting plate and the impact drill is lifted, the earth and sand placed on the mounting plate is also lifted together, so that the discharge efficiency of the earth and sand can be improved. can.

３）衝撃ドリルがロープに引っ張られて持ち上げられた時、衝撃部がドリルロッドに対して回転することで、衝撃ドリルと地盤の接触面積が大きくなり、衝撃ドリルが持ち上げられていく過程で、衝撃ドリルの底面と地盤の間に負の圧力が発生し、地盤底部に沈殿した泥や土砂を掻き揚げるようにして泥水の中に浮遊させることで、破砕物が地盤に沈殿しないため、掘削が容易になる。 3) When the impact drill is pulled by the rope and lifted, the impact part rotates with respect to the drill rod, increasing the contact area between the impact drill and the ground, and in the process of lifting the impact drill, the impact Negative pressure is generated between the bottom of the drill and the ground, and the mud and earth and sand that have settled on the bottom of the ground are lifted up and floated in the muddy water. become.

４）フックとスライドフックの間には隙間があるため、掘削時の衝撃力によって、フックが損傷することを防ぐ。 4) Since there is a gap between the hook and the slide hook, it is possible to prevent the hook from being damaged by the impact force during excavation.

５）ロープで衝撃ドリルを吊り上げる際、フックに連結するロッドとともに衝撃ドリルを持ち上げるため、フックだけを吊り上げて衝撃ドリルを持ち上げる場合に比べて損傷しにくい。
5) When lifting the impact drill with a rope, the impact drill is lifted together with the rod connected to the hook, so that it is less likely to be damaged as compared with the case where only the hook is lifted and the impact drill is lifted.

衝撃ドリルの構成全体を示す上方斜視図（左）と内部の構成を示す概略図（右）An upward perspective view (left) showing the entire structure of the impact drill and a schematic view (right) showing the internal structure. 図１の内部構造を示す図（左）とフック付近の部分拡大図（右）A view showing the internal structure of FIG. 1 (left) and a partially enlarged view near the hook (right). 図１の底面を示す下方斜視図Downward perspective view showing the bottom surface of FIG. 衝撃ドリルの衝撃部を除いた構成全体を示す上方斜視図（左）と下方斜視図（右）Upper perspective view (left) and lower perspective view (right) showing the entire configuration excluding the impact part of the impact drill. 図４の内部構造を示す図（左）と部分拡大図（右上、右下）Figure 4 showing the internal structure (left) and partially enlarged view (upper right, lower right) 衝撃部の構成を示す上方斜視図（左上）と下方斜視図（右上）、切断面を示す上方斜視図（下）An upper perspective view (upper left) and a lower perspective view (upper right) showing the configuration of the impact portion, and an upper perspective view (lower) showing the cut surface. 六角柱が取り付けられた衝撃部を示す上方斜視図Upper perspective view showing the impact part to which the hexagonal column is attached 第１泥抜孔と第２泥抜孔の内部構造を示す部分断面図Partial cross-sectional view showing the internal structures of the first mud removal hole and the second mud removal hole スライドフックの一実施例を示す上方斜視図Upper perspective view showing an embodiment of a slide hook ロッドと回転機構の構造を示す斜視図Perspective view showing the structure of the rod and the rotating mechanism ロッドの構造を示す斜視図Perspective view showing the structure of the rod 回転機構の内部構造を示す図The figure which shows the internal structure of a rotating mechanism 取付カバーの上方斜視図Upper perspective view of the mounting cover ワッシャーの取り付け例を示す上方斜視図Upper perspective view showing an example of mounting a washer スライドフックの一実施例を示す斜視図（左上、左下）、切断面を示す斜視図（右上）、部分拡大図（右下）A perspective view (upper left, lower left) showing an embodiment of the slide hook, a perspective view showing the cut surface (upper right), and a partially enlarged view (lower right). 衝撃ドリルの部分的な内部構造を示す図（左）、部分拡大断面図（右）Figure showing the partial internal structure of the impact drill (left), partially enlarged cross section (right)

まず、衝撃ドリルの構成について説明する。 First, the configuration of the impact drill will be described.

衝撃ドリルは、図１に示すように、フック１、ドリルロッド３、三角板４、衝撃部５からなる。
ドリルロッド３には、底面に向かって、末広がりの形状になるように４つの三角板４が等間隔に形成されている。
それぞれの三角板４の下端部には、周方向に沿って、アーチプレート６が弧状に形成されている。 As shown in FIG. 1, the impact drill includes a hook 1, a drill rod 3, a triangular plate 4, and an impact portion 5.
On the drill rod 3, four triangular plates 4 are formed at equal intervals so as to have a divergent shape toward the bottom surface.
At the lower end of each of the triangular plates 4, an arch plate 6 is formed in an arc shape along the circumferential direction.

ドリルロッド３の下端には、衝撃部５が取り付けられており、衝撃部５は、十字状の取付板３０と、その先端に取り付けられた４つの円弧板１７からなる。
円弧板１７は、ドリルロッド３のアーチプレート６の側面に沿って、アーチプレート６の外周側に取り付けられており、弧状のアーチプレート６と同じ長さである。 An impact portion 5 is attached to the lower end of the drill rod 3, and the impact portion 5 is composed of a cross-shaped attachment plate 30 and four arc plates 17 attached to the tips thereof.
The arc plate 17 is attached to the outer peripheral side of the arch plate 6 along the side surface of the arch plate 6 of the drill rod 3, and has the same length as the arc-shaped arch plate 6.

衝撃部５は、ドリルロッド３から取り外しが可能な状態で、ドリルロッド３の下端に取り付けられており、円弧板１７は、ドリルロッド３のアーチプレート６とは、独立して回転する構造になっている。
円弧板１７と取付板３０の下面側には、図３に示すとおり、凸部１８が設けられている。
凸部１８の役割は、公知の衝撃ドリルの底面に設けられた突起と同じように、衝撃ドリルの地盤に対する衝撃の効果を高めることであり、凸部１８は全て、その先端の内角が５０度に形成されている。 The impact portion 5 is attached to the lower end of the drill rod 3 in a state where it can be removed from the drill rod 3, and the arc plate 17 has a structure that rotates independently of the arch plate 6 of the drill rod 3. ing.
As shown in FIG. 3, a convex portion 18 is provided on the lower surface side of the arc plate 17 and the mounting plate 30.
The role of the convex portion 18 is to enhance the effect of impact on the ground of the impact drill, similar to the protrusion provided on the bottom surface of the known impact drill, and all the convex portions 18 have an internal angle of 50 degrees at the tip thereof. Is formed in.

図５に示すように、ドリルロッド３の内部は、その中心軸に沿って、鉛直上下方向に貫通する貫通孔が形成されており、貫通孔は、最上段から、ロッド孔２２、バネ取付孔２３、回転筒取付孔２５、締付溝２６が順次形成されている。
また、バネ取付孔２３の内壁には、ガイド溝２４が形成されている。 As shown in FIG. 5, the inside of the drill rod 3 is formed with a through hole penetrating vertically and vertically along the central axis thereof, and the through hole is a rod hole 22 and a spring mounting hole from the uppermost stage. 23, a rotary cylinder mounting hole 25, and a tightening groove 26 are sequentially formed.
Further, a guide groove 24 is formed on the inner wall of the spring mounting hole 23.

この貫通孔には、ロッド７が収容されており、ロッド７は、牽引されて、鉛直上方向に移動したときに、図１０のスプリング８を押し込み、スプリング８から鉛直下方向への反発力を得る。
そのため、ロッド７の外周面には、スプリング８を鉛直上方向に押し込むためのガイドリング４２が形成されており、さらに、ガイドリング４２の外周面には、２つのガイドブロック４１が形成されている。 A rod 7 is housed in this through hole, and when the rod 7 is towed and moves in the vertically upward direction, the spring 8 in FIG. 10 is pushed in and a repulsive force is applied from the spring 8 in the vertically downward direction. obtain.
Therefore, a guide ring 42 for pushing the spring 8 in the vertically upward direction is formed on the outer peripheral surface of the rod 7, and two guide blocks 41 are formed on the outer peripheral surface of the guide ring 42. ..

つまり、スプリング８の下端はガイドリング４２の上端面に当接し、スプリング８の上端はバネ取付孔２３の上端面に当接している。
また、ロッド７は、図１１に示すとおり、ガイドリング４２の下方に、螺旋状の凸部４５が形成されている。 That is, the lower end of the spring 8 is in contact with the upper end surface of the guide ring 42, and the upper end of the spring 8 is in contact with the upper end surface of the spring mounting hole 23.
Further, as shown in FIG. 11, the rod 7 has a spiral convex portion 45 formed below the guide ring 42.

さらに、ロッド７には、第１シールリング１２が取り付けられている。
第１シールリング１２は、ロッド７が鉛直上下方向の運動を実現するための作動油が漏出しないように、油圧シリンダと同じ仕組みで、図示しない作動油の漏出を防ぐためのシールである。 Further, a first seal ring 12 is attached to the rod 7.
The first seal ring 12 is a seal for preventing the leakage of the hydraulic oil (not shown) by the same mechanism as the hydraulic cylinder so that the hydraulic oil for realizing the vertical vertical movement of the rod 7 does not leak.

図１０〜１２に示すとおり、ロッド７には、回転筒１１、取付カバー９、締付カバー３６からなる回転機構が取り付けられている。
回転筒１１の内壁には、ロッド７の螺旋状の凸部４５が嵌合する螺旋溝４６が形成されており、ロッド７は、螺旋状の凸部４５部分が、この回転筒１１の内壁の螺旋溝４６に勘合するように収められている。 As shown in FIGS. 10 to 12, a rotating mechanism including a rotating cylinder 11, a mounting cover 9, and a tightening cover 36 is attached to the rod 7.
A spiral groove 46 into which the spiral convex portion 45 of the rod 7 is fitted is formed on the inner wall of the rotary cylinder 11, and the spiral convex portion 45 portion of the rod 7 is formed on the inner wall of the rotary cylinder 11. It is housed so as to fit into the spiral groove 46.

これにより、ロッド７の鉛直上下方向の動きに合わせて、回転筒１１が回転する。
回転筒１１には、締付ナット１０が取り付けられ、ロッド７の初期位置を位置決めできる。
つまり、締付ナット１０の高さを変更することで、ロッド７の初期位置を変更できる。 As a result, the rotary cylinder 11 rotates according to the vertical vertical movement of the rod 7.
A tightening nut 10 is attached to the rotary cylinder 11, and the initial position of the rod 7 can be positioned.
That is, the initial position of the rod 7 can be changed by changing the height of the tightening nut 10.

また、回転筒１１の上下端部には、第２軸受４４と、第１軸受３４が取り付けられており、回転筒１１の周りにはベアリング４０が取り付けられている。
第１軸受３４の下部には、締付カバー３６が取り付けられており、図１４に示すとおり、ワッシャー１４を挟んで、第２締付ネジ１６によって、ドリルロッド３に形成された締付溝２６に螺合して、ロッド７とともに回転機構をドリルロッド３に締結して固定する。 A second bearing 44 and a first bearing 34 are attached to the upper and lower ends of the rotary cylinder 11, and a bearing 40 is attached around the rotary cylinder 11.
A tightening cover 36 is attached to the lower portion of the first bearing 34, and as shown in FIG. 14, a tightening groove 26 formed in the drill rod 3 by the second tightening screw 16 with the washer 14 interposed therebetween. The rotation mechanism is fastened to and fixed to the drill rod 3 together with the rod 7.

締付カバー３６の役割は、回転筒１１が回転筒取付穴２５から落下しないように、回転筒１１を鉛直下方向から押さえることである。
また、締付カバー３６の中空部分には、取付カバー９が収められており、取付カバー９の円筒状の側面には、周方向に第２シールリング１５が取り付けられている。
この第２シールリング１５によって、取付カバー９は、締付カバー３６内に密着した状態で収められる。
取付カバー９は、中空に形成されており、中空部分には六角孔４７が形成されている。 The role of the tightening cover 36 is to press the rotary cylinder 11 from the vertically downward direction so that the rotary cylinder 11 does not fall from the rotary cylinder mounting hole 25.
A mounting cover 9 is housed in the hollow portion of the tightening cover 36, and a second seal ring 15 is mounted on the cylindrical side surface of the mounting cover 9 in the circumferential direction.
The second seal ring 15 accommodates the mounting cover 9 in close contact with the tightening cover 36.
The mounting cover 9 is formed in a hollow shape, and a hexagonal hole 47 is formed in the hollow portion.

この構成からなるロッド７は、ドリルロッド３の貫通孔である、ロッド孔２２に第１シールリング１２が、バネ取付孔２３にスプリング８が、バネ取付孔２３の内壁に形成されたガイド溝２４にガイドリング４２の外周面に形成されているガイドブロック４１が、回転筒取付孔２５に回転筒１１が、それぞれ収められており、最後に、締付カバー３６を締付溝２６の下から第２締付ネジ１６によって締結することで、ドリルロッド３の貫通孔内に収められる。 The rod 7 having this configuration has a first seal ring 12 in the rod hole 22 and a spring 8 in the spring mounting hole 23, which are through holes of the drill rod 3, and a guide groove 24 formed in the inner wall of the spring mounting hole 23. The guide block 41 formed on the outer peripheral surface of the guide ring 42 is housed in the rotary cylinder mounting hole 25, and the rotary cylinder 11 is housed in the rotary cylinder mounting hole 25. 2 By fastening with the tightening screw 16, the drill rod 3 is housed in the through hole.

特に、ロッド７は、ガイドブロック４１がガイド溝２４に嵌合した状態で収められていることで、ロッド７がドリルロッド３の中心軸に沿って鉛直上下方向に移動しても、ロッド７とドリルロッド３が別々に回転することがない。 In particular, since the rod 7 is housed in a state where the guide block 41 is fitted in the guide groove 24, even if the rod 7 moves vertically and vertically along the central axis of the drill rod 3, the rod 7 and the rod 7 are housed. The drill rod 3 does not rotate separately.

スライドフック２は、図９、図１５に示すとおり、牽引用のロープを通す吊り穴５１が形成されており、吊り穴５１の上端部には、ロープが引っかかるロープ溝３７が形成されている。
スライドフック２は、ロッド７と、着脱自在に連結されており、スライドフック２を牽引すると、ロッド７が鉛直上方向に持ち上がる。 As shown in FIGS. 9 and 15, the slide hook 2 is formed with a hanging hole 51 through which a rope for towing is passed, and a rope groove 37 on which the rope is caught is formed at the upper end of the hanging hole 51.
The slide hook 2 is detachably connected to the rod 7, and when the slide hook 2 is towed, the rod 7 is lifted vertically upward.

スライドフック２とロッド７の連結方法は、特に限定はされない。
例えば、図１１に示すとおり、ロッド７の上端に第１ネジ穴３２が形成され、図９に示すとおり、スライドフック２に第２ネジ穴３８が形成され、第１締付ネジ１３が、スライドフック２に形成された第２ネジ穴３８に収められた状態で、ロッド７の上端の第１ネジ穴３２に螺合することで、スライドフック２をロッド７に連結させることもできる。
また、図１５のように、スライドフック２の下端側にスロット溝４３が形成され、ロッド７の上端に形成された、貫通孔を有する締付ブロック４９が、スロット溝４３に収められた状態で、第４締結ネジ４８が螺合することで、スライドフック２をロッド７に連結させることもできる。 The method of connecting the slide hook 2 and the rod 7 is not particularly limited.
For example, as shown in FIG. 11, a first screw hole 32 is formed at the upper end of the rod 7, a second screw hole 38 is formed in the slide hook 2 and the first tightening screw 13 slides as shown in FIG. The slide hook 2 can also be connected to the rod 7 by screwing it into the first screw hole 32 at the upper end of the rod 7 while being housed in the second screw hole 38 formed in the hook 2.
Further, as shown in FIG. 15, a slot groove 43 is formed on the lower end side of the slide hook 2, and a tightening block 49 having a through hole formed on the upper end of the rod 7 is housed in the slot groove 43. , The slide hook 2 can be connected to the rod 7 by screwing the fourth fastening screw 48.

スライドフック２は、フック１の逆Ｕ字型の隙間の中で、鉛直上下方向に移動できる。
そのため、スライドフック２は、フック１の溝の上端に達すると、鉛直上方向に持ち上げることができず、それ以上持ち上げると、フック１やドリルロッド３とともに鉛直上方向に持ち上がる。
本実施例にかかる衝撃ドリルは、フック１の逆Ｕ字型の隙間の範囲で、鉛直上下方向に移動するスライドフック２の動きに合わせて、衝撃部５がドリルロッド３に対して４５度回転する。 The slide hook 2 can move vertically and vertically in the inverted U-shaped gap of the hook 1.
Therefore, when the slide hook 2 reaches the upper end of the groove of the hook 1, it cannot be lifted vertically upward, and when it is lifted further, it is lifted vertically upward together with the hook 1 and the drill rod 3.
In the impact drill according to this embodiment, the impact portion 5 rotates 45 degrees with respect to the drill rod 3 in accordance with the movement of the slide hook 2 that moves vertically and vertically within the range of the inverted U-shaped gap of the hook 1. do.

図８及び１３に示すとおり、取付カバー９には、上下に貫通する複数の第２泥抜孔３５が、周方向に等間隔に形成されている。
また、図７及び８に示すとおり、衝撃部５の十字状の取付板３０にも、上下に貫通する複数の第１泥抜孔３１が、第２泥抜孔３５と一致する位置に形成されている。 As shown in FIGS. 8 and 13, a plurality of second mud removal holes 35 penetrating vertically are formed in the mounting cover 9 at equal intervals in the circumferential direction.
Further, as shown in FIGS. 7 and 8, a plurality of first mud removal holes 31 penetrating vertically are also formed in the cross-shaped mounting plate 30 of the impact portion 5 at positions corresponding to the second mud removal holes 35. ..

そのため、第１泥抜孔３１と第２泥抜孔３５は、連通している。
第１泥抜孔３１と第２泥抜孔３５の役割は、衝撃ドリルの使用中、六角柱３３を収めた取付カバー９の六角孔４７の上方部分の空間に侵入した泥が、六角柱３３と取付カバー９の動きに影響することを防止することであり、泥水を排出するためのものである。 Therefore, the first mud removal hole 31 and the second mud removal hole 35 communicate with each other.
The role of the first mud removal hole 31 and the second mud removal hole 35 is that the mud that has entered the space above the hexagonal hole 47 of the mounting cover 9 containing the hexagonal column 33 attaches to the hexagonal column 33 while the impact drill is in use. This is to prevent the cover 9 from being affected by its movement, and to discharge muddy water.

図４に示すとおり、アーチプレート６の外周面には、ガイドブロック２１が形成されている。
図６に示すとおり、衝撃部５の先端に取り付けられた円弧板１７の内周側の壁面には、内周に沿って、ガイドブロック２１が嵌合するガイドブロック溝２９が形成されている。
ガイドブロック溝２９には、図７に示すとおり、ガイドプレート孔５０が形成されており、このガイドプレート孔５０に、図６に示すように、ガイドプレート５２を挿入し、ガイドプレート５２とガイドプレート孔５０を、締結孔２０から差し込む第３締結ネジ２８によって取り付ける。 As shown in FIG. 4, a guide block 21 is formed on the outer peripheral surface of the arch plate 6.
As shown in FIG. 6, a guide block groove 29 into which the guide block 21 is fitted is formed along the inner circumference on the inner peripheral side wall surface of the arc plate 17 attached to the tip of the impact portion 5.
As shown in FIG. 7, a guide plate hole 50 is formed in the guide block groove 29, and as shown in FIG. 6, a guide plate 52 is inserted into the guide plate hole 50, and the guide plate 52 and the guide plate are inserted. The hole 50 is attached by a third fastening screw 28 that is inserted through the fastening hole 20.

この時、ガイドプレート５２は、図１に示すように、ガイドブロック溝２９に嵌合するガイドブロック２１を、ガイドブロック２１の上端面から押さえるように固定する。
図４に示すように、アーチプレート６の下端面には、ストッパー１９が取り付けられている。
ストッパー１９は、アーチプレート６と円弧板１７が同じ位置で重なるようにするためのものである。 At this time, as shown in FIG. 1, the guide plate 52 fixes the guide block 21 fitted in the guide block groove 29 so as to be pressed from the upper end surface of the guide block 21.
As shown in FIG. 4, a stopper 19 is attached to the lower end surface of the arch plate 6.
The stopper 19 is for allowing the arch plate 6 and the arc plate 17 to overlap at the same position.

図５に示すように、フック１の立設する２本の柱の内壁には、スライド溝２７が形成されている。
このスライド溝２７に、図９に示すように、スライドフック２の両端に形成されているスライダー３９が嵌合し、スライドフック２の鉛直上下方向のスライドをガイドする。
スライド溝２７は、スライドフック２が鉛直上方向の最高地点まで牽引された状態でも、フック１とスライドフック２が、当接しないで、隙間が生じるように設計されている。
この隙間があることで、衝撃ドリル全体、ドリルロッド３、またはロッド７から受ける衝撃が、スライドフック２を介して、フック１に伝達されることがない。 As shown in FIG. 5, a slide groove 27 is formed on the inner wall of the two pillars on which the hook 1 is erected.
As shown in FIG. 9, sliders 39 formed at both ends of the slide hook 2 are fitted into the slide groove 27 to guide the slide hook 2 in the vertical vertical direction.
The slide groove 27 is designed so that the hook 1 and the slide hook 2 do not come into contact with each other and a gap is formed even when the slide hook 2 is pulled to the highest point in the vertically upward direction.
Due to this gap, the impact received from the entire impact drill, the drill rod 3, or the rod 7 is not transmitted to the hook 1 via the slide hook 2.

次に、衝撃ドリルのドリルロッド３に衝撃部５を取り付ける手順を説明する。 Next, a procedure for attaching the impact portion 5 to the drill rod 3 of the impact drill will be described.

衝撃ドリルのドリルロッド３に、衝撃部５を取り付けるには、まず、衝撃部５の十字状の取付板３０の中央に、六角柱３３を取り付ける。
そして、ドリルロッド３の取付カバー９に形成された六角孔４７に六角柱３３が挿入されるように、ドリルロッド３に、衝撃部５を取り付ける。 To attach the impact portion 5 to the drill rod 3 of the impact drill, first, the hexagonal column 33 is attached to the center of the cross-shaped attachment plate 30 of the impact portion 5.
Then, the impact portion 5 is attached to the drill rod 3 so that the hexagonal column 33 is inserted into the hexagonal hole 47 formed in the attachment cover 9 of the drill rod 3.

このとき、ドリルロッド３のアーチプレート６の外周側に円弧板１７が重なるように、円弧板１７を配置し、円弧板１７のガイドブロック溝２９にガイドブロック２１を嵌合させた状態で、ガイドプレート孔５０にガイドプレート５２を挿入し、ガイドプレート５２がガイドブロック２１の上端面を押さえるように、ガイドプレート５２をガイドプレート孔５０に挿入し、締結孔２０から差し込む第３締結ネジ２８で取り付ける。
取り外すときは、第３締付ネジ２８を全て外し、その後、ガイドプレート５２を全て外すことで、ドリルロッド３のアーチプレート６から衝撃部５を取り外すことができる。 At this time, the arc plate 17 is arranged so that the arc plate 17 overlaps the outer peripheral side of the arch plate 6 of the drill rod 3, and the guide block 21 is fitted into the guide block groove 29 of the arc plate 17 to guide the guide. Insert the guide plate 52 into the plate hole 50, insert the guide plate 52 into the guide plate hole 50 so that the guide plate 52 presses the upper end surface of the guide block 21, and attach it with the third fastening screw 28 inserted from the fastening hole 20. ..
When removing, the impact portion 5 can be removed from the arch plate 6 of the drill rod 3 by removing all the third tightening screws 28 and then removing all the guide plates 52.

次に、衝撃ドリルのドリルロッド３にロッド７を取り付ける手順を説明する。 Next, a procedure for attaching the rod 7 to the drill rod 3 of the impact drill will be described.

衝撃ドリルのドリルロッド３にロッド７を取り付けるには、まずフック１の逆Ｕ字型の隙間にスライドフック２を置き、スライドフック２のスライダー３９をフック１のスライド溝２７に合わせる。
その後、ドリルロッド３の下端側から、貫通孔のバネ取付孔２３まで、スプリング８を挿入する。
次に、ドリルロッド３の下端側から、貫通孔にロッド７を挿入し、ロッド７の上端を、スライドフック２に固定する。 To attach the rod 7 to the drill rod 3 of the impact drill, first place the slide hook 2 in the inverted U-shaped gap of the hook 1, and align the slider 39 of the slide hook 2 with the slide groove 27 of the hook 1.
After that, the spring 8 is inserted from the lower end side of the drill rod 3 to the spring mounting hole 23 of the through hole.
Next, the rod 7 is inserted into the through hole from the lower end side of the drill rod 3, and the upper end of the rod 7 is fixed to the slide hook 2.

この時、ロッド７に取り付けられたガイドリング４２によって、スプリング８をバネ取付孔２３内で押さえつけ、ガイドリング４２に取り付けられたガイドブロック４１をガイド溝２４に嵌め合わせる。
ロッド７を挿入したら、締付ナット１０をバネ取付孔２３に挿入して、ロッド７に締結する。 At this time, the spring 8 is pressed in the spring mounting hole 23 by the guide ring 42 attached to the rod 7, and the guide block 41 attached to the guide ring 42 is fitted into the guide groove 24.
After inserting the rod 7, the tightening nut 10 is inserted into the spring mounting hole 23 and fastened to the rod 7.

その後、第２軸受４４を回転筒取付孔２５に挿入し、２つのベアリング４０を取り付けた回転筒１１を回転筒取付孔２５に挿入する。
回転筒１１をロッド７にネジで螺合し、回転筒１１に取付カバー９を取り付けた後、第１軸受３４を回転筒１１の下端に取り付け、締付カバー３６を取付カバー９に嵌め込む。
締付カバー３６の下端は、第２締付ネジ１６を介してドリルロッド３の下端に固定される。 After that, the second bearing 44 is inserted into the rotary cylinder mounting hole 25, and the rotary cylinder 11 to which the two bearings 40 are mounted is inserted into the rotary cylinder mounting hole 25.
The rotary cylinder 11 is screwed into the rod 7 with a screw, the mounting cover 9 is attached to the rotary cylinder 11, the first bearing 34 is attached to the lower end of the rotary cylinder 11, and the tightening cover 36 is fitted into the mounting cover 9.
The lower end of the tightening cover 36 is fixed to the lower end of the drill rod 3 via the second tightening screw 16.

その後、取付カバー９の六角孔４７内に六角柱３３を挿入する。
取り外すときは、第２締付ネジ１６を全て外し、締付カバー３６を取り外し、第１軸受３４を取り外した後、回転筒１１を回転させながら取り外し、第２軸受４４を取り外して、締付ナット１０を緩める。
その後、ロッド７からスライドフック２を外して、ロッド７を貫通孔から引き抜く。 After that, the hexagonal column 33 is inserted into the hexagonal hole 47 of the mounting cover 9.
When removing, remove all the second tightening screws 16, remove the tightening cover 36, remove the first bearing 34, then remove while rotating the rotary cylinder 11, remove the second bearing 44, and remove the tightening nut. Loosen 10.
After that, the slide hook 2 is removed from the rod 7, and the rod 7 is pulled out from the through hole.

次に、衝撃ドリルの使用方法を説明する。 Next, how to use the impact drill will be described.

本実施例にかかる衝撃ドリルを、牽引装置に、牽引用のロープで取り付ける。
牽引用のロープは、スライドフック２の吊り穴５１に通す。
牽引用のロープを鉛直上方向に引っ張ると、スライドフック２が鉛直上方向に持ち上がる。 The impact drill according to this embodiment is attached to the towing device with a towing rope.
The towing rope is passed through the hanging hole 51 of the slide hook 2.
When the towing rope is pulled vertically upward, the slide hook 2 is lifted vertically upward.

スライドフック２が持ち上がると、これに合わせてロッド７が鉛直上方向に持ち上がる。
つまり、衝撃ドリルが牽引装置によって引っ張られて鉛直上方向に持ち上げられると、スライドフック２が、フック１との隙間の高さだけ、鉛直上方向に移動する。
このスライドフック２の移動分だけ、ロッド７が鉛直上方向に持ち上がる。
ロープの牽引は、牽引装置を使ってすることができる。 When the slide hook 2 is lifted, the rod 7 is lifted vertically upward in accordance with the lift.
That is, when the impact drill is pulled by the traction device and lifted vertically upward, the slide hook 2 moves vertically upward by the height of the gap with the hook 1.
The rod 7 is lifted vertically upward by the amount of movement of the slide hook 2.
Rope traction can be done using a traction device.

ロッド７が鉛直上方向に持ち上がると、ロッド７は回転しないが、ロッド７の螺旋状の凸部４５が回転筒１１の内壁に形成された螺旋溝４６と嵌合しているため、回転筒１１が回転する。
回転筒１１の回転により、回転筒１１に連結する取付カバー９も回転し、取付カバー９の六角孔４７に嵌合する六角柱３３も回転する。
六角柱３３が回転することで、衝撃部５の十字状の取付板３０が、ドリルロッド３に取り付けられた４つの三角板４の十字状の下端面からずれた位置まで、衝撃部５が回転する。 When the rod 7 is lifted vertically upward, the rod 7 does not rotate, but since the spiral convex portion 45 of the rod 7 is fitted with the spiral groove 46 formed on the inner wall of the rotary cylinder 11, the rotary cylinder 11 Rotates.
Due to the rotation of the rotary cylinder 11, the mounting cover 9 connected to the rotary cylinder 11 also rotates, and the hexagonal column 33 fitted in the hexagonal hole 47 of the mounting cover 9 also rotates.
As the hexagonal column 33 rotates, the impact portion 5 rotates to a position where the cross-shaped mounting plate 30 of the impact portion 5 deviates from the cross-shaped lower end surface of the four triangular plates 4 attached to the drill rod 3. ..

衝撃部５の十字状の取付板３０が、ドリルロッド３に取り付けられた４つの三角板４の十字状の下端面からずれた位置まで回転し、取付板３０の天面が露出することで、地盤の土砂が取付板３０によって掬い上げられ、衝撃ドリルが持ち上げられる時に、取付板３０の上に載った土砂も一緒に持ち上げられる。
これにより、土砂の排出効率を向上させる。 The cross-shaped mounting plate 30 of the impact portion 5 rotates to a position deviated from the cross-shaped lower end surface of the four triangular plates 4 attached to the drill rod 3, and the top surface of the mounting plate 30 is exposed, so that the ground is exposed. The earth and sand are scooped up by the mounting plate 30, and when the impact drill is lifted, the earth and sand placed on the mounting plate 30 is also lifted.
This improves the efficiency of soil discharge.

また、衝撃ドリルが持ち上げられると、衝撃ドリルの底部と地盤との間に負の圧力が発生し、地盤の底に沈殿した土砂が泥水の中に浮きあがることで、地盤を掘削しやすい状態にする。 In addition, when the impact drill is lifted, negative pressure is generated between the bottom of the impact drill and the ground, and the sediment that has settled on the bottom of the ground floats in the muddy water, making it easier to excavate the ground. do.

スライドフック２の上端がフック１の上端部に当接すると、ロッド７の鉛直上方向の移動は終了し、衝撃部５の回転も終了する。
ロープの牽引をやめると、衝撃ドリルは自重によって落下し、スライドフック２も鉛直下方向に移動する。
スライドフック２が鉛直下方向に移動すると、スプリング８の反発力も加わって、ロッド７が鉛直下方向に移動する。 When the upper end of the slide hook 2 comes into contact with the upper end of the hook 1, the vertical upward movement of the rod 7 ends, and the rotation of the impact portion 5 also ends.
When the towing of the rope is stopped, the impact drill falls due to its own weight, and the slide hook 2 also moves vertically downward.
When the slide hook 2 moves vertically downward, the repulsive force of the spring 8 is also applied, and the rod 7 moves vertically downward.

ロッド７が鉛直下方向に移動するとき、ロッド７は回転しないが、ロッド７の螺旋状の凸部４５が回転筒１１の内壁に形成された螺旋溝４６と嵌合しているため、回転筒１１が逆回転する。
回転筒１１の逆回転により、回転筒１１に連結する取付カバー９も逆回転し、取付カバー９の六角孔４７に嵌合する六角柱３３も逆回転する。
六角柱３３が逆回転することで、衝撃部５の十字状の取付板３０が、ドリルロッド３に取り付けられた４つの三角板４の十字状の下端面と一致する位置まで、衝撃部５が逆回転する。
つまり、非牽引状態の位置に戻るが、非牽引状態では、三角板の下端面と、十字状の取付板が重なっている。
この状態で衝撃ドリルが地盤に打ち付けられることで、衝撃ドリルの地盤への衝撃を増加させる。 When the rod 7 moves vertically downward, the rod 7 does not rotate, but since the spiral convex portion 45 of the rod 7 is fitted with the spiral groove 46 formed on the inner wall of the rotary cylinder 11, the rotary cylinder 11 rotates in the reverse direction.
Due to the reverse rotation of the rotary cylinder 11, the mounting cover 9 connected to the rotary cylinder 11 also rotates in the reverse direction, and the hexagonal column 33 fitted in the hexagonal hole 47 of the mounting cover 9 also rotates in the reverse direction.
When the hexagonal column 33 rotates in the reverse direction, the impact portion 5 is reversed until the cross-shaped mounting plate 30 of the impact portion 5 coincides with the cross-shaped lower end surface of the four triangular plates 4 attached to the drill rod 3. Rotate.
That is, the position returns to the non-traction state, but in the non-traction state, the lower end surface of the triangular plate and the cross-shaped mounting plate overlap.
By striking the impact drill against the ground in this state, the impact of the impact drill on the ground is increased.

さらに、その後、衝撃ドリルが持ち上げられると、衝撃ドリルの底部と地盤との間に負の圧力が発生し、地盤の底に沈殿した土砂が泥水の中に浮きあがることで、地盤を掘削しやすい状態にする。
そして、これを繰り返すことで、地盤の底に沈殿した土砂が泥水の中に浮きあがり、地盤を掘削しやすい状態にして、地盤を掘削する。 Furthermore, when the impact drill is subsequently lifted, a negative pressure is generated between the bottom of the impact drill and the ground, and the sediment that has settled on the bottom of the ground floats in the muddy water, making it easier to excavate the ground. Put it in a state.
Then, by repeating this, the sediment settled on the bottom of the ground floats in the muddy water, making it easy to excavate the ground and excavating the ground.

１フック
２スライドフック
３ドリルロッド
４三角板
５衝撃部
６アーチプレート
７ロッド
８スプリング
９取付カバー
１０締付ナット
１１回転筒
１２第１シールリング
１３第１締付ネジ
１４ワッシャー
１５第２シールリング
１６第２締付ネジ
１７円弧板
１８凸部
１９ストッパー
２０締結孔
２１ガイドブロック
２２ロッド孔
２３バネ取付孔
２４ガイド溝
２５回転筒取付孔
２６締結溝
２７スライド溝
２８第３締結ネジ
２９ガイドブロック溝
３０取付板
３１第１泥抜孔
３２第１ネジ穴
３３六角柱
３４第１軸受
３５第２泥抜孔
３６締付カバー
３７ロープ溝
３８第２ネジ穴
３９スライダー
４０ベアリング
４１ガイドブロック
４２ガイドリング
４３スロット溝
４４第２軸受
４５螺旋状の凸部
４６螺旋溝
４７六角孔
４８第４締結ネジ
４９締付ブロック
５０ガイドプレート孔
５１吊り穴
５２ガイドプレート

1 Hook 2 Slide hook 3 Drill rod 4 Triangular plate 5 Impact part 6 Arch plate 7 Rod 8 Spring 9 Mounting cover 10 Tightening nut 11 Rotating cylinder 12 1st sealing ring 13 1st tightening screw 14 Washer 15 2nd sealing ring 16th 2 Tightening screw 17 Arc plate 18 Convex 19 Stopper 20 Fastening hole 21 Guide block 22 Rod hole 23 Spring mounting hole 24 Guide groove 25 Rotating cylinder mounting hole 26 Fastening groove 27 Slide groove 28 Third fastening screw 29 Guide block groove 30 Mounting Plate 31 1st mud drain hole 32 1st screw hole 33 Hexagonal pillar 34 1st bearing 35 2nd mud drain hole 36 Tightening cover 37 Rope groove 38 2nd screw hole 39 Slider 40 Bearing 41 Guide block 42 Guide ring 43 Slot groove 44 No. 2 Bearing 45 Spiral convex part 46 Spiral groove 47 Hexagonal hole 48 4th fastening screw 49 Tightening block 50 Guide plate hole 51 Suspension hole 52 Guide plate

Claims

A drill rod on a columnar body, in which four triangular plates with a downwardly expanding shape are arranged so as to extend from the body in a cross shape.
A hook provided at the upper end of the drill rod for attaching a rope to pull the drill rod,
A cross-shaped impact part attached to the bottom of the triangular plate so that it overlaps the cross-shaped lower end surface of the triangular plate,
It is an impact drill consisting of

The drill rod
An arc-shaped arch plate formed along the circumferential direction for each triangular plate on the side peripheral part of the triangular plate,
A through hole formed along the central axis of the body to accommodate the rod,
Consists of

The impact part is
A mounting plate that is formed in the same cross shape as a triangular plate and has a hexagonal column standing in the center of the cross shape.
At each cross-shaped tip of the mounting plate, an arc-shaped arc plate formed along the circumferential direction so as to cover the outer peripheral surface of the arch plate,
Consists of

The rod is
A slide hook that is provided in the gap between the hook at the upper end and hooks the rope that pulls the drill rod together with the rod.
A rotating cylinder that surrounds the lower end of the rod with a spiral convex part formed at the lower end and a spiral convex part formed.
A mounting cover that is mounted on a rotating cylinder and inserts a hexagonal column that stands on the mounting plate,
A tightening cover that houses the mounting cover,
A spring to give a vertical downward repulsive force to the rod in the through hole,
Consists of
As the towed rod moves vertically and vertically, the rotating cylinder having a spiral groove that fits into the spiral convex portion of the rod rotates.
In a configuration in which the impact portion including the mounting plate is rotated via a hexagonal column inserted into the mounting cover mounted on the rotating cylinder.

By pulling the slide hook and lifting the rod vertically upward, the drill rod is pulled together with the rod.
As the rod moves vertically upward, the rotating cylinder that fits into the spiral convex portion formed on the rod rotates along the spiral groove, and the rod rotates along the spiral groove.
Due to the rotation of the rotating cylinder, the mounting cover attached to the rotating cylinder rotates,
Along with the hexagonal column inserted in the mounting cover, the mounting plate on which the hexagonal column stands rotates.
The arc plate at the tip of the mounting plate rotates independently of the arch plate,
Because the top surface of the mounting plate deviates from the bottom surface of the triangular plate
Sediment that has settled on the bottom of the ground is scooped up by the mounting plate of the impact part, making it easier to excavate the ground.

By stopping the towing of the slide hook and dropping the drill rod together with the rod in the vertical downward direction to make it non-towing.
As the rod that has obtained the repulsive force of the spring moves vertically downward, the rotating cylinder that fits into the spiral convex portion formed on the rod rotates in the reverse direction along the spiral groove.
Due to the reverse rotation of the rotating cylinder, the mounting cover attached to the rotating cylinder also rotates in the reverse direction.
Along with the hexagonal column inserted in the mounting cover, the mounting plate on which the hexagonal column stands also rotates in the reverse direction.
The arc plate at the tip of the mounting plate rotates independently of the arch plate,
Because the top surface of the mounting plate overlaps the bottom surface of the triangular plate
Increases the impact on the ground when the impact part collides with the ground

An impact drill used for pile foundation work.

A drill rod on a columnar body, in which four triangular plates with a downwardly expanding shape are arranged so as to extend from the body in a cross shape.
A hook provided at the upper end of the drill rod for attaching a rope to pull the drill rod,
A cross-shaped impact part attached to the bottom of the triangular plate so that it overlaps the cross-shaped lower end surface of the triangular plate,
It is an impact drill consisting of

The drill rod
An arc-shaped arch plate formed along the circumferential direction for each triangular plate on the side peripheral part of the triangular plate,
A through hole formed along the central axis of the body to accommodate the rod,
Consists of

The impact part is
A mounting plate that is formed in the same cross shape as a triangular plate, has a hexagonal column erected in the center of the cross shape, and has a plurality of first mud drain holes that penetrate vertically.
At each cross-shaped tip of the mounting plate, an arc-shaped arc plate formed along the circumferential direction so as to cover the outer peripheral surface of the arch plate,
Consists of

The rod is
A slide hook that is provided in the gap between the hook at the upper end and hooks the rope that pulls the drill rod together with the rod.
A rotating cylinder that surrounds the lower end of the rod with a spiral convex part formed at the lower end and a spiral convex part formed.
A mounting cover that is mounted on a rotating cylinder and inserts a hexagonal column that stands on the mounting plate,
A tightening cover that houses the mounting cover,
A spring to give a vertical downward repulsive force to the rod in the through hole,
Consists of
A plurality of second mud removal holes penetrating vertically are formed in the mounting cover at the same positions as the first mud removal holes formed in the mounting plate.
As the towed rod moves vertically and vertically, the rotating cylinder having a spiral groove that fits into the spiral convex portion of the rod rotates.
In a configuration in which the impact portion including the mounting plate is rotated via a hexagonal column inserted into the mounting cover mounted on the rotating cylinder.

By pulling the slide hook and lifting the rod vertically upward, the drill rod is pulled together with the rod.
As the rod moves vertically upward, the rotating cylinder that fits into the spiral convex portion formed on the rod rotates along the spiral groove, and the rod rotates along the spiral groove.
Due to the rotation of the rotating cylinder, the mounting cover attached to the rotating cylinder rotates,
Along with the hexagonal column inserted into the mounting cover, the mounting plate on which the hexagonal column stands rotates while discharging the muddy water in the mounting cover into which the hexagonal note is inserted from the first mud drain hole and the second mud drain hole that communicate with each other. ,
The arc plate at the tip of the mounting plate rotates independently of the arch plate,
Because the top surface of the mounting plate deviates from the bottom surface of the triangular plate
Sediment that has settled on the bottom of the ground is scooped up by the mounting plate of the impact part, making it easier to excavate the ground.

By stopping the towing of the slide hook and dropping the drill rod together with the rod in the vertical downward direction to make it non-towing.
As the rod that has obtained the repulsive force of the spring moves vertically downward, the rotating cylinder that fits into the spiral convex portion formed on the rod rotates in the reverse direction along the spiral groove.
Due to the reverse rotation of the rotating cylinder, the mounting cover attached to the rotating cylinder also rotates in the reverse direction.
Along with the hexagonal column inserted in the mounting cover, the mounting plate on which the hexagonal column stands also rotates in the reverse direction.
The arc plate at the tip of the mounting plate rotates independently of the arch plate,
Because the top surface of the mounting plate overlaps the bottom surface of the triangular plate
Increases the impact on the ground when the impact part collides with the ground

An impact drill used for pile foundation work.

A drill rod on a columnar body, in which four triangular plates with a downwardly expanding shape are arranged so as to extend from the body in a cross shape.
A hook provided at the upper end of the drill rod for attaching a rope to pull the drill rod,
A cross-shaped impact part attached to the bottom of the triangular plate so that it overlaps the cross-shaped lower end surface of the triangular plate,
It is an impact drill consisting of

The drill rod
An arc-shaped arch plate formed along the circumferential direction for each triangular plate on the side peripheral part of the triangular plate,
A through hole formed along the central axis of the body to accommodate the rod,
Consists of

The impact part is
A mounting plate that is formed in the same cross shape as a triangular plate, has a hexagonal column erected in the center of the cross shape, and has a plurality of first mud drain holes that penetrate vertically.
At each cross-shaped tip of the mounting plate, an arc-shaped arc plate formed along the circumferential direction so as to cover the outer peripheral surface of the arch plate,
Convex parts provided on the lower surface side of the mounting plate and arc plate,
Consists of

The rod is
A slide hook that is provided in the gap between the hook at the upper end and hooks the rope that pulls the drill rod together with the rod.
A rotating cylinder that surrounds the lower end of the rod with a spiral convex part formed at the lower end and a spiral convex part formed.
A mounting cover that is mounted on a rotating cylinder and inserts a hexagonal column that stands on the mounting plate,
A tightening cover that houses the mounting cover,
A spring to give a vertical downward repulsive force to the rod in the through hole,
Consists of
A plurality of second mud removal holes penetrating vertically are formed in the mounting cover at the same positions as the first mud removal holes formed in the mounting plate.
As the towed rod moves vertically and vertically, the rotating cylinder having a spiral groove that fits into the spiral convex portion of the rod rotates.
In a configuration in which the impact portion including the mounting plate is rotated via a hexagonal column inserted into the mounting cover mounted on the rotating cylinder.

By pulling the slide hook and lifting the rod vertically upward, the drill rod is pulled together with the rod.
As the rod moves vertically upward, the rotating cylinder that fits into the spiral convex portion formed on the rod rotates along the spiral groove, and the rod rotates along the spiral groove.
Due to the rotation of the rotating cylinder, the mounting cover attached to the rotating cylinder rotates,
Along with the hexagonal column inserted into the mounting cover, the mounting plate on which the hexagonal column stands rotates while discharging the muddy water in the mounting cover into which the hexagonal note is inserted from the first mud drain hole and the second mud drain hole that communicate with each other. ,
The arc plate at the tip of the mounting plate rotates independently of the arch plate,
Because the top surface of the mounting plate deviates from the bottom surface of the triangular plate
Sediment that has settled on the bottom of the ground is scooped up by the mounting plate of the impact part, making it easier to excavate the ground.

By stopping the towing of the slide hook and dropping the drill rod together with the rod in the vertical downward direction to make it non-towing.
As the rod that has obtained the repulsive force of the spring moves vertically downward, the rotating cylinder that fits into the spiral convex portion formed on the rod rotates in the reverse direction along the spiral groove.
Due to the reverse rotation of the rotating cylinder, the mounting cover attached to the rotating cylinder also rotates in the reverse direction.
Along with the hexagonal column inserted in the mounting cover, the mounting plate on which the hexagonal column stands also rotates in the reverse direction.
The arc plate at the tip of the mounting plate rotates independently of the arch plate,
Because the top surface of the mounting plate overlaps the bottom surface of the triangular plate
Increases the impact on the ground when the impact part collides with the ground

An impact drill used for pile foundation work.