JP6827342B2 - Compaction machine - Google Patents
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- JP6827342B2 JP6827342B2 JP2017045156A JP2017045156A JP6827342B2 JP 6827342 B2 JP6827342 B2 JP 6827342B2 JP 2017045156 A JP2017045156 A JP 2017045156A JP 2017045156 A JP2017045156 A JP 2017045156A JP 6827342 B2 JP6827342 B2 JP 6827342B2
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Description
本発明は、転圧輪を用いて地盤を締固める締固め機械に関するものである。 The present invention relates to a compaction machine that compacts the ground using a compaction wheel.
特許文献１には、円筒形の振動ローラをクローラによって走行させる締固め機械が開示されている。
また、特許文献２には、複数の遊転輪によって地盤を転圧するローラ装置が開示されていて、前記複数の遊転輪は、左右方向の基軸を中心として円周状に複数配設されるとともに各々が左右方向の軸回りに回転可能に軸装され、駆動手段によって基軸回りに公転させられる。
Patent Document 1 discloses a compaction machine in which a cylindrical vibrating roller is driven by a crawler.
Further, Patent Document 2 discloses a roller device that rolls the ground by a plurality of idle wheels, and the plurality of the plurality of idle wheels are arranged in a circumferential shape around a base axis in the left-right direction. At the same time, each of them is rotatably mounted around the axis in the left-right direction, and is revolved around the base axis by the driving means.
従来、土木工事で使用される転圧輪は、円筒型、若しくは、円筒型の外周に突起物を設けたものであった。
しかし、このような転圧輪では、地盤が鉛直方向に圧縮されるのみであるため、撒き出した材料の表層部分だけが高密度になり、高密度になった表層が深部への転圧力の伝達を阻害するため、高い締固め効率を得ることが困難であった。
Conventionally, the compaction wheel used in civil engineering work has been a cylindrical type or one in which a protrusion is provided on the outer circumference of the cylindrical type.
However, in such a rolling wheel, since the ground is only compressed in the vertical direction, only the surface layer portion of the sprinkled material becomes dense, and the dense surface layer becomes the rolling pressure to the deep part. It was difficult to obtain high compaction efficiency because it interfered with transmission.
そこで、本願発明は、締固められる範囲をより深部に拡大でき、以って、締固め効率を向上させることができる、締固め機械を提供することを目的とする。 Therefore, an object of the present invention is to provide a compaction machine capable of expanding the compaction range to a deeper portion and thereby improving the compaction efficiency.
そのため、本発明に係る締固め機械は、その一態様として、断面形状が円形の転圧輪を備え、前記転圧輪は、回転軸方向の一端から他端に向かって外径を徐々に縮径した後徐々に拡径した凹み部を少なくとも１つ有する第１転圧輪と、回転軸方向の一端から他端に向かって外径を徐々に拡径した後徐々に縮径した出っ張り部を少なくとも１つ有する第２転圧輪とを車体前後に備え、前記第１転圧輪の前記凹み部と前記第２転圧輪の前記出っ張り部とが車体前後方向に沿って並ぶ。 Therefore, as one aspect of the compaction machine according to the present invention, a compaction wheel having a circular cross-sectional shape is provided, and the compaction wheel gradually reduces its outer diameter from one end to the other end in the rotation axis direction. A first rolling compact wheel having at least one recessed portion whose diameter is gradually increased after the diameter is increased, and a protruding portion whose outer diameter is gradually increased from one end to the other end in the direction of the rotation axis and then gradually reduced. A second rolling compaction wheel having at least one is provided in the front and rear of the vehicle body, and the recessed portion of the first compaction wheel and the protruding portion of the second compaction wheel are arranged along the front and rear direction of the vehicle body.
また、本発明に係る締固め機械は、その一態様として、前記第１転圧輪は、前記凹み部を回転軸方向の中央に１つ有し、前記第２転圧輪は、前記出っ張り部を回転軸方向の中央に１つ有する。
また、本発明に係る締固め機械は、その一態様として、前記第１転圧輪は、前記凹み部を回転軸方向に複数並設して有し、前記第２転圧輪は、前記出っ張り部を回転軸方向に複数並設して有する。
Further, as one aspect of the compaction machine according to the present invention, the first compaction wheel has one recessed portion in the center in the direction of the rotation axis, and the second compaction wheel has the protruding portion. Is located in the center of the rotation axis direction.
Further, as one aspect of the compaction machine according to the present invention, the first compaction wheel has a plurality of recessed portions arranged side by side in the rotation axis direction, and the second compaction wheel has the protrusion. A plurality of portions are arranged side by side in the direction of the rotation axis.
また、本発明に係る締固め機械は、その一態様として、前記凹み部と前記出っ張り部との少なくも一方は、回転軸方向の一端から他端に向かって外径を徐々に拡径あるいは縮径したテーパー部分が円錐面で形成される。 Further, as one aspect of the compaction machine according to the present invention, at least one of the recessed portion and the protruding portion gradually expands or contracts in outer diameter from one end to the other end in the rotation axis direction. The diameter tapered portion is formed by a conical surface.
また、本発明に係る締固め機械は、その一態様として、前記円錐面の半頂角は５degから２５degの間に設定される。
また、本発明に係る締固め機械は、その一態様として、前記締固め機械は、転圧輪の交換が可能なハンドガイドローラである。
Further, as one aspect of the compaction machine according to the present invention, the half apex angle of the conical surface is set between 5 deg and 25 deg.
Further, as one aspect of the compaction machine according to the present invention, the compaction machine is a hand guide roller in which a compaction wheel can be replaced.
上記発明によると、凹み部、出っ張り部による転圧によって回転軸方向に沿った土粒子の移動が生じることで、外径が一様な転圧輪による転圧に比べ、締固められる範囲（密度増加領域）をより深部に拡大できる。 According to the above invention, the rolling compaction caused by the rolling compaction by the recessed portion and the protruding portion causes the movement of soil particles along the rotation axis direction, so that the compaction range (density) is compared with the rolling compaction by the compaction wheel having a uniform outer diameter. The area of increase) can be expanded deeper.
以下では、図面を参照して、本発明に係る締固め機械の実施形態を説明する。
図１は、本発明に係る締固め機械の一態様としてのハンドガイドローラ１０の側面図である。
Hereinafter, embodiments of the compaction machine according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view of the hand guide roller 10 as an aspect of the compaction machine according to the present invention.
ハンドガイドローラ１０は、トラックフレーム２０の上方にエンジンフレーム３０を支持して構成される。
トラックフレーム２０は、一対のサイドフレーム２１，２１を図示省略した複数のクロスメンバーで連結して構成される。
The hand guide roller 10 is configured to support the engine frame 30 above the track frame 20.
The track frame 20 is configured by connecting a pair of side frames 21 and 21 with a plurality of cross members (not shown).
前後一対の転圧輪４０，５０は、サイドフレーム２１，２１の間に交換可能に支持され、図示しない油圧モータで回転駆動される。
エンジンフレーム３０上には、エンジン６０や補機類６５などが搭載される。
The pair of front and rear compaction wheels 40, 50 are interchangeably supported between the side frames 21 and 21, and are rotationally driven by a hydraulic motor (not shown).
The engine 60, auxiliary machinery 65, and the like are mounted on the engine frame 30.
また、エンジンフレーム３０の後部には、操舵桿７０の基端が連結される。
操舵桿７０の先端には操作ボックス８０が設けられ、操作ボックス８０には、前後進レバー８１、アクセルレバー８２、操舵ハンドル８３などの運転操作部品が備えられる。
作業者は、操作ボックス８０に備えられた前後進レバー８１、アクセルレバー８２などを操作しながら、操舵ハンドル８３を左右に操作してハンドガイドローラ１０の進路を変更する。
Further, the base end of the steering stick 70 is connected to the rear portion of the engine frame 30.
An operation box 80 is provided at the tip of the steering stick 70, and the operation box 80 is provided with driving operation parts such as a forward / backward lever 81, an accelerator lever 82, and a steering handle 83.
The operator changes the course of the hand guide roller 10 by operating the steering handle 83 left and right while operating the forward / backward lever 81 and the accelerator lever 82 provided in the operation box 80.
転圧輪４０，５０は、回転軸ＡＲに直交する断面での形状が円形の金属製中空の転圧輪（鉄輪）であり、起振装置９０を構成する起振軸がエンジン６０によって回転駆動されることで、起振軸の偏芯ウエイトによってトラックフレーム２０全体が加振されて、転圧輪４０，５０を振動させながら地盤の転圧（締固め）が行われる。
転圧輪４０，５０の外径は、回転軸ＡＲ方向の全域に亘って一様ではない。
転圧輪４０は、図２に示すように、回転軸ＡＲ方向（長さ方向）の中央に凹み部４１を有する鼓型に形成され、転圧輪５０は、回転軸ＡＲ２方向（長さ方向）の中央に出っ張り部５１を有する独楽型に形成される。
The rolling wheels 40 and 50 are hollow metal rolling wheels (iron wheels) having a circular shape in a cross section orthogonal to the rotating shaft AR, and the exciting shafts constituting the exciting device 90 are rotationally driven by the engine 60. By doing so, the entire track frame 20 is vibrated by the eccentric weight of the excitation shaft, and the ground is compacted (compacted) while vibrating the compaction wheels 40 and 50.
The outer diameters of the compaction wheels 40 and 50 are not uniform over the entire area in the rotation axis AR direction.
As shown in FIG. 2, the rolling wheel 40 is formed in a drum shape having a recess 41 in the center in the rotation axis AR direction (length direction), and the rolling wheel 50 is formed in the rotation axis AR2 direction (length direction). ) Is formed in a top shape having a protruding portion 51 in the center.
転圧輪４０は、回転軸ＡＲ方向の両端が同じ外径Ｄ１に形成される一方、回転軸ＡＲの方向の一端から他端に向かって、外径Ｄ１から徐々に縮径して回転軸ＡＲ方向の中央に至り、その後、回転軸ＡＲ方向の中央から徐々に拡径されて外径Ｄ１に戻る、左右対称な凹み部４１を有する。
凹み部４１の谷４１ｃでの外径Ｄ２は両端部の外径Ｄ１よりも小さい。
そして、転圧輪４０は、凹み部４１を回転軸ＡＲ方向の中央に有することで、回転軸ＡＲ方向の両端から中央に向かってなだらかに凹んだ鼓型をなす。
The compaction ring 40 is formed with the same outer diameter D1 at both ends in the direction of the rotation axis AR, while the diameter is gradually reduced from the outer diameter D1 from one end to the other end in the direction of the rotation axis AR. It has a symmetrical recess 41 that reaches the center of the direction and then gradually expands in diameter from the center of the rotation axis AR direction and returns to the outer diameter D1.
The outer diameter D2 at the valley 41c of the recessed portion 41 is smaller than the outer diameter D1 at both ends.
The compaction wheel 40 has a recessed portion 41 in the center of the rotation axis AR direction, so that the compaction ring 40 forms a drum shape that is gently recessed from both ends in the rotation axis AR direction toward the center.
凹み部４１の回転軸ＡＲ方向に向かって徐々に縮径／拡径するテーパー部分は、軸線（回転軸ＡＲ）に対する母線の傾斜角が一定である円錐面に形成される。
つまり、凹み部４１は、回転軸ＡＲ方向の一端から他端に向かって徐々に縮径する円錐面で形成されるテーパー部分（第１円錐面）４１ａと、回転軸ＡＲ方向の一端から他端に向かって徐々に拡径する円錐面で形成されるテーパー部分（第２円錐面）４１ｂとで構成される。そして、各テーパー部分４１ａ，４１ｂの外径Ｄ１の底面を回転軸ＡＲ方向の両端部とし、回転軸ＡＲ方向の中央において各テーパー部分４１ａ，４１ｂの外径Ｄ２（Ｄ２＜Ｄ１）の平面を突き合わせることで、凹み部４１が形成される。
The tapered portion of the recessed portion 41 whose diameter is gradually reduced / expanded toward the rotation axis AR is formed on a conical surface in which the inclination angle of the generatrix with respect to the axis (rotation axis AR) is constant.
That is, the recessed portion 41 has a tapered portion (first conical surface) 41a formed by a conical surface that gradually reduces in diameter from one end in the rotation axis AR direction to the other end, and the recessed portion 41 from one end to the other end in the rotation axis AR direction. It is composed of a tapered portion (second conical surface) 41b formed by a conical surface that gradually expands in diameter toward. Then, the bottom surfaces of the outer diameters D1 of the tapered portions 41a and 41b are both ends in the rotation axis AR direction, and the planes of the outer diameters D2 (D2 <D1) of the tapered portions 41a and 41b are butted at the center in the rotation axis AR direction. As a result, the recessed portion 41 is formed.
一方、転圧輪５０は、回転軸ＡＲ方向の両端が同じ外径Ｄ３に形成される一方、回転軸ＡＲ方向の一端から他端に向かって、外径Ｄ３から徐々に拡径して回転軸ＡＲ方向の中央に至り、その後、回転軸ＡＲ方向の中央から徐々に縮径されて外径Ｄ３に戻る、左右対称な出っ張り部５１を有する。
出っ張り部５１の頂点５１ｃの外径Ｄ４が両端部の外径Ｄ３よりも大きい。
On the other hand, the compaction wheel 50 is formed with the same outer diameter D3 at both ends in the rotation axis AR direction, while the rotation shaft gradually expands from the outer diameter D3 from one end to the other end in the rotation axis AR direction. It has a symmetrical protruding portion 51 that reaches the center in the AR direction and then is gradually reduced in diameter from the center in the rotation axis AR direction and returns to the outer diameter D3.
The outer diameter D4 of the apex 51c of the protruding portion 51 is larger than the outer diameter D3 of both ends.
そして、転圧輪５０は、出っ張り部５１を回転軸ＡＲ方向の中央に有することで、回転軸ＡＲ方向の両端から中央に向かってなだらかに出っ張った独楽型をなす。
出っ張り部５１の回転軸ＡＲ方向に向かって徐々に縮径／拡径するテーパー部分は、軸線（回転軸ＡＲ）に対する母線の傾斜角が一定である円錐面に形成される。
The rolling compact wheel 50 has a protruding portion 51 at the center of the rotation axis AR direction, so that the rolling wheel 50 forms a spinning top that gently protrudes from both ends in the rotation axis AR direction toward the center.
The tapered portion of the protruding portion 51 whose diameter is gradually reduced / expanded in the direction of the rotation axis AR is formed on a conical surface in which the inclination angle of the generatrix with respect to the axis (rotation axis AR) is constant.
つまり、出っ張り部５１は、回転軸ＡＲ方向の一端から他端に向かって徐々に拡径する円錐面で形成されるテーパー部分（第２円錐面）５１ａと、回転軸ＡＲ方向の一端から他端に向かって徐々に縮径される円錐面で形成されるテーパー部分（第１円錐面）５１ｂとで構成される。そして、各テーパー部分５１ａ，５１ｂの外径Ｄ３の平面を回転軸ＡＲ方向両端部とし、回転軸ＡＲ方向の中央において各テーパー部分５１ａ，５１ｂの外径Ｄ４（Ｄ４＞Ｄ３）の底面を突き合わせることで、出っ張り部５１が形成される。 That is, the protruding portion 51 has a tapered portion (second conical surface) 51a formed by a conical surface whose diameter gradually increases from one end in the rotation axis AR direction toward the other end, and the other end from one end in the rotation axis AR direction. It is composed of a tapered portion (first conical surface) 51b formed by a conical surface whose diameter is gradually reduced toward. Then, the planes of the outer diameters D3 of the tapered portions 51a and 51b are set at both ends in the rotation axis AR direction, and the bottom surfaces of the outer diameters D4 (D4> D3) of the tapered portions 51a and 51b are abutted at the center in the rotation axis AR direction. As a result, the protruding portion 51 is formed.
なお、円錐面で形成されるテーパー部分４１ａ，４１ｂと回転軸ＡＲとがなす傾斜角（円錐面の半頂角θ）、及び、円錐面で形成されるテーパー部分５１ａ，５１ｂと回転軸ＡＲとがなす傾斜角（円錐面の半頂角θ）は、５degから２５degの間に設定することが好ましい。
上記構成において、回転軸ＡＲ方向の中央に凹み部４１を有した転圧輪４０と、回転軸ＡＲ方向の中央に出っ張り部５１を有した転圧輪５０とがハンドガイドローラ１０の前後に配置されるので、転圧輪４０の凹み部４１の谷４１ｃと転圧輪５０の出っ張り部５１の頂点５１ｃとは、ハンドガイドローラ１０の前後方向に沿って一列に並ぶことになる。
The inclination angle (half apex angle θ of the conical surface) formed by the tapered portions 41a and 41b formed by the conical surface and the rotating shaft AR, and the tapered portions 51a and 51b formed by the conical surface and the rotating shaft AR. The inclination angle (half apex angle θ of the conical surface) is preferably set between 5 deg and 25 deg.
In the above configuration, a rolling wheel 40 having a recessed portion 41 in the center of the rotation axis AR direction and a rolling compaction ring 50 having a protruding portion 51 in the center of the rotating shaft AR direction are arranged in front of and behind the hand guide roller 10. Therefore, the valley 41c of the recessed portion 41 of the rolling compaction wheel 40 and the apex 51c of the protruding portion 51 of the compaction wheel 50 are lined up in a row along the front-rear direction of the hand guide roller 10.
以下では、回転軸ＡＲ方向の中央に凹み部４１を有した鼓型の転圧輪４０、及び、回転軸ＡＲ方向の中央に出っ張り部５１を有した独楽型の転圧輪５０の作用効果を、図３−図５を参照しつつ説明する。
図３は、外径が軸方向に一様な円筒状の転圧輪１００によって地盤２００の締固めを行った場合の締固め範囲（密度増加領域）を模式的に示す。
In the following, the effects of the drum-shaped compaction wheel 40 having a recessed portion 41 in the center of the rotation axis AR direction and the spinning top-shaped compaction wheel 50 having a protruding portion 51 in the center of the rotation axis AR direction will be described. , FIG. 3-FIG. 5 will be described with reference to FIG.
FIG. 3 schematically shows a compaction range (density increase region) when the ground 200 is compacted by a cylindrical compaction ring 100 having a uniform outer diameter in the axial direction.
外径が一様な転圧輪１００による締固めの場合、一様な鉛直方向の転圧力が地盤２００に加わるため、転圧輪１００の全幅に亘って地盤２００が鉛直方向にのみ圧縮され、地盤２００の表層部分だけが高密度になる。
そして、高密度になった表層部分が深部への転圧力の伝達を阻害するため、締固め範囲が深部に到達せず、締固め効率が悪い。
In the case of compaction by a compaction wheel 100 having a uniform outer diameter, a uniform vertical rolling pressure is applied to the ground 200, so that the ground 200 is compressed only in the vertical direction over the entire width of the compaction wheel 100. Only the surface layer portion of the ground 200 becomes dense.
Then, since the surface layer portion having a high density hinders the transmission of the rolling pressure to the deep part, the compaction range does not reach the deep part, and the compaction efficiency is poor.
一方、回転軸ＡＲ方向の中央に凹み部４１を有した鼓型の転圧輪４０によって地盤２００の締固めを行った場合、図４に模式的に示すように締固め範囲が形成される。
鼓型の転圧輪４０による締固めの場合、最初に転圧輪４０の両端部が地盤２００にめり込むことで、転圧輪４０の両端部から締固め範囲が形成される。
On the other hand, when the ground 200 is compacted by a drum-shaped compaction ring 40 having a recessed portion 41 in the center in the AR direction of the rotation axis, a compaction range is formed as schematically shown in FIG.
In the case of compaction by the drum-shaped compaction ring 40, both ends of the compaction ring 40 are first sunk into the ground 200 to form a compaction range from both ends of the compaction ring 40.
その後、凹み部４１を形成するテーパー部分４１ａ，４１ｂで地盤２００が押圧されることで、転圧輪４０の両端直下から谷４１ｃの直下に向かう土粒子の左右方向の移動が生じる。これによって、締固め範囲が転圧輪４０の両端直下から谷４１ｃの直下に向かって拡大され、更に、谷４１ｃの直下の土粒子は転圧力を受けて鉛直方向の下向きに移動する。
このため、鼓型の転圧輪４０による締固めの場合、外径が一様な転圧輪１００による締固めに比べて、凹み部４１の谷４１ｃの直下を中心に締固め範囲が深度方向により拡大される。
After that, the ground 200 is pressed by the tapered portions 41a and 41b forming the recessed portion 41, so that the soil particles move in the left-right direction from directly below both ends of the compaction ring 40 to directly below the valley 41c. As a result, the compaction range is expanded from directly below both ends of the compaction ring 40 toward directly below the valley 41c, and the soil particles directly below the valley 41c are subjected to rolling pressure and move downward in the vertical direction.
Therefore, in the case of compaction by the drum-shaped compaction ring 40, the compaction range is in the depth direction centering directly under the valley 41c of the recessed portion 41 as compared with the compaction by the compaction ring 100 having a uniform outer diameter. Enlarged by.
また、回転軸ＡＲ方向の中央に出っ張り部５１を有した独楽型の転圧輪５０で締固めを行った場合、図５に模式的に示すように締固め範囲が形成される。
独楽型の転圧輪５０による締固めの場合、最初に出っ張り部５１の頂点５１ｃが地盤２００にめり込んで頂点５１ｃの直下（回転軸ＡＲ方向の中央）から締固め範囲が形成される。
Further, when compaction is performed by a top-type compaction wheel 50 having a protruding portion 51 at the center in the AR direction of the rotation axis, a compaction range is formed as schematically shown in FIG.
In the case of compaction by the spinning top type rolling wheel 50, the apex 51c of the protruding portion 51 first sinks into the ground 200, and a compaction range is formed from directly below the apex 51c (center in the AR direction of the rotation axis).
その後、出っ張り部５１を形成するテーパー部分５１ａ，５１ｂで地盤２００が押圧されることで、頂点５１ｃ直下から回転軸ＡＲ方向の両端直下に向かう土粒子の左右方向の移動が生じる。これによって、締固め範囲が頂点５１ｃ直下から回転軸ＡＲ方向の両端直下に向けて拡大され、更に、深部になるほど土粒子の左右方向の移動が大きくなる。
このため、独楽型の転圧輪５０による締固めの場合、外径が一様な転圧輪１００による締固めに比べて、締固め範囲が深度方向により拡大され、更に、転圧輪５０の直下領域よりも左右にはみ出た領域まで締固め範囲が拡大される場合がある。
After that, the ground 200 is pressed by the tapered portions 51a and 51b forming the protruding portion 51, so that the soil particles move in the left-right direction from directly below the apex 51c to just below both ends in the rotation axis AR direction. As a result, the compaction range is expanded from directly below the apex 51c to directly below both ends in the rotation axis AR direction, and the deeper the part, the greater the movement of the soil particles in the left-right direction.
Therefore, in the case of compaction by the spinning top type compaction wheel 50, the compaction range is expanded in the depth direction as compared with the compaction by the compaction wheel 100 having a uniform outer diameter, and further, the compaction ring 50 The compaction range may be expanded to the area that protrudes to the left and right from the area directly below.
このように、回転軸ＡＲ方向の中央に凹み部４１を有した鼓型の転圧輪４０による締固め、及び、回転軸ＡＲ方向の中央に出っ張り部５１を有した独楽型の転圧輪５０による締固めでは、外径が一様な転圧輪１００による締固めに比べて、締固め範囲（密度増加領域）が深度方向により拡大される。
したがって、ハンドガイドローラ１０が、鼓型の転圧輪４０と独楽型の転圧輪５０との少なくとも一方を転圧輪として備えることで、外径が一様な転圧輪のみを備える場合に比べて、所望の締固め度（％）を満たす締固め範囲を深度方向により拡大して形成でき、締固め効率が向上する。
なお、締固め度（％）を密度比として求めることができ、例えば、試験に用いた試料と同じ土（または路盤材）であるという前提で、室内締固め試験で得られた最大乾燥密度と施工転圧された土の乾燥密度の比であるＤ値を締固め規定値として用いることができる。Ｄ値を求める場合、日本工業規格「突固めによる土の締固め試験方法」（JIS A 1210:2009）に準拠する室内試験によって、最大乾燥密度を求めることができる。
Therefore, as compared with the case where the hand guide roller 10 is provided with at least one of the drum-shaped rolling wheel 40 and the spinning top-shaped rolling ring 50 as the rolling ring, the hand guide roller 10 is provided with only the rolling ring having a uniform outer diameter. Therefore, the compaction range satisfying the desired compaction degree (%) can be expanded in the depth direction, and the compaction efficiency is improved.
The degree of compaction (%) can be obtained as a density ratio. For example, the maximum dry density obtained in the indoor compaction test on the assumption that the soil (or roadbed material) is the same as the sample used in the test. The D value, which is the ratio of the dry density of the soil compacted during construction, can be used as the compaction specified value. When determining the D value, the maximum dry density can be determined by a laboratory test that complies with the Japanese Industrial Standards "Soil compaction test method by compaction" (JIS A 1210: 2009).
更に、鼓型の転圧輪４０と独楽型の転圧輪５０とを車体前後に配置したハンドガイドローラ１０では、鼓型の転圧輪４０と独楽型の転圧輪５０とのいずれか一方を備える場合に比べ、締固め効率をより向上させることが可能である。
鼓型の転圧輪４０による締固めでは、凹み部４１の谷４１ｃ直下での締固め深度（所定以上の締固め度になる深度）が転圧輪４０の両端部直下に比べて浅くなる一方、独楽型の転圧輪５０による締固めでは、転圧輪５０の両端部直下での締固め深度が、出っ張り部５１の頂点５１ｃ直下に比べて浅くなる。
Further, in the hand guide roller 10 in which the drum-shaped compaction wheel 40 and the top-type compaction wheel 50 are arranged in the front and rear of the vehicle body, either the drum-shaped compaction wheel 40 or the top-type compaction wheel 50 is used. It is possible to further improve the compaction efficiency as compared with the case of providing.
In the compaction by the drum-shaped compaction ring 40, the compaction depth (depth at which the compaction degree is equal to or higher than a predetermined value) directly below the valley 41c of the recessed portion 41 is shallower than that directly below both ends of the compaction ring 40. In the compaction by the spinning top type compaction ring 50, the compaction depth immediately below both ends of the compaction wheel 50 is shallower than that directly below the apex 51c of the protruding portion 51.
しかし、鼓型の転圧輪４０と独楽型の転圧輪５０とを車体前後に配置したハンドガイドローラ１０では、転圧輪４０の凹み部４１の谷４１ｃで締固められる領域が、転圧輪５０の出っ張り部５１の頂点５１ｃのめり込みで締固められ、また、転圧輪５０の両端部で締固められる領域が、転圧輪４０の両端部のめり込みで締固められることになる。
つまり、鼓型の転圧輪４０及び独楽型の転圧輪５０は、相互に他方の締固めで締固め深度が比較的浅くなる領域を自身の転圧輪のめり込みでより深度方向に締固めるので、ローラ進行方向から見て左右方向における締固め深度のばらつきが小さくなる。
However, in the hand guide roller 10 in which the drum-shaped compaction wheel 40 and the spinning top-type compaction wheel 50 are arranged in the front and rear of the vehicle body, the area compacted by the valley 41c of the recessed portion 41 of the compaction wheel 40 is the compaction wheel. The area to be compacted by the recessing of the apex 51c of the protruding portion 51 of the 50, and the region compacted at both ends of the compaction ring 50 is compacted by the recessing of both ends of the compaction ring 40.
That is, the drum-shaped compaction wheel 40 and the top-type compaction wheel 50 compact each other in the depth direction by squeezing the compaction wheel in a region where the compaction depth is relatively shallow due to the other compaction. , The variation in compaction depth in the left-right direction when viewed from the roller traveling direction becomes small.
次に、転圧輪４０の凹み部４１の各テーパー部分４１ａ，４１ｂを形成する円錐面、及び、転圧輪５０の出っ張り部５１の各テーパー部分５１ａ，５１ｂを形成する円錐面の半頂角θ（テーパー部分の傾斜角）による締固め特性の違いを説明する。
図６は、地盤の材料が粘土であるときの締固め度と深度分布の関係を、鼓型の転圧輪４０、独楽型の転圧輪５０それぞれについて検証した結果を示す。ここで、鼓型の転圧輪４０、独楽型の転圧輪５０それぞれで半頂角θ（傾斜角）を１０deg、１５deg、２０degの３種類に設定し、それぞれの角度について締固め度と深度分布の関係を室内試験で求めた。
なお、本願出願人は、締固め度と深度分布の関係を求める室内試験として、デジタル画像から非接触で歪み分布を求める手法であるデジタル画像相関法（ＤＩＣ法）を用いた歪み分布測定を行った。デジタル画像相関法は、計測対象物表面の変形前後におけるデジタル画像を取得し、得られたデジタル画像の輝度分布から測定物表面の変位量、変位方向を同時に求める手法である。
Next, the half apex angle of the conical surface forming the tapered portions 41a and 41b of the recessed portion 41 of the compaction ring 40 and the conical surface forming the tapered portions 51a and 51b of the protruding portion 51 of the compaction ring 50. The difference in compaction characteristics depending on θ (inclination angle of the tapered portion) will be described.
FIG. 6 shows the results of verifying the relationship between the degree of compaction and the depth distribution when the ground material is clay for each of the drum-shaped compaction ring 40 and the top-type compaction ring 50. Here, the half apex angle θ (tilt angle) is set to three types of 10 deg, 15 deg, and 20 deg for each of the drum-shaped compaction wheel 40 and the top-type compaction wheel 50, and the compaction degree and depth are set for each angle. The relationship of distribution was determined by a laboratory test.
The applicant of the present application performs strain distribution measurement using the digital image correlation method (DIC method), which is a method for obtaining strain distribution from digital images in a non-contact manner, as a laboratory test for determining the relationship between compaction degree and depth distribution. It was. The digital image correlation method is a method of acquiring digital images before and after deformation of the surface of a measurement object and simultaneously obtaining the displacement amount and displacement direction of the surface of the measurement object from the brightness distribution of the obtained digital image.
図６に示すように、鼓型の転圧輪４０と独楽型の転圧輪５０とのいずれでも、半頂角θを大きくして凹み部４１を深く出っ張り部５１を高くすることで、各深度での締固め度が増して締固め範囲がより深度方向に拡大する傾向を示す。しかし、独楽型の転圧輪５０による締固め深度は鼓型の転圧輪４０による締固め深度よりも僅かに深くなる傾向があり、独楽型の転圧輪５０で半頂角θを２０degとしたときに、締固め範囲が最も深度方向に拡大された。 As shown in FIG. 6, in both the drum-shaped compaction ring 40 and the spinning top-type compaction ring 50, the half-apical angle θ is increased to deeply project the recessed portion 41 and raise the protruding portion 51, respectively. The degree of compaction at the depth increases, and the compaction range tends to expand in the depth direction. However, the compaction depth of the top-type compaction wheel 50 tends to be slightly deeper than the compaction depth of the drum-type compaction wheel 40, and the top angle θ of the top-type compaction wheel 50 is 20 deg. At that time, the compaction range was expanded in the deepest direction.
したがって、地盤の材料が粘土である場合、半頂角θを２０degとした独楽型の転圧輪５０を用いることで締固め効率を可及的に向上させることができ、鼓型の転圧輪４０と独楽型の転圧輪５０とを組み合わせて用いる場合は、共に半頂角θを２０degに設定した独楽型の転圧輪５０と鼓型の転圧輪４０とを備えるようにすることができる。 Therefore, when the ground material is clay, the compaction efficiency can be improved as much as possible by using the spinning top 50 with a half apex angle θ of 20 deg, and the drum-shaped compaction wheel. When the 40 and the spinning top 50 are used in combination, it is possible to provide both the spinning top 50 with the half apex angle θ set to 20 deg and the drum-shaped rolling wheel 40. it can.
一方、図７は、地盤の材料が砂及び粘土である場合で、半頂角θを１０deg、１５deg、２０degの３種類に設定したときの締固め度と深度分布の関係を、鼓型の転圧輪４０、独楽型の転圧輪５０それぞれについて検証した結果を示す。
地盤の材料が砂及び粘土である場合、粘土のみである場合に比べて、締固め度と深度分布の関係のばらつきが大きく、また、独楽型の転圧輪５０においては、半頂角θ＝２０degとした場合よりも半頂角θ＝１５degとした場合の方が、最も深部まで高い締固め度を示した。
On the other hand, FIG. 7 shows the relationship between the degree of compaction and the depth distribution when the half apex angle θ is set to three types of 10 deg, 15 deg, and 20 deg when the ground material is sand and clay. The results of verification of each of the pressure ring 40 and the spinning top 50 are shown.
When the ground material is sand and clay, the relationship between the degree of compaction and the depth distribution varies greatly compared to the case where only clay is used, and in the spinning top 50, the half apex angle θ = The degree of compaction to the deepest part was higher when the half apex angle θ = 15 deg than when it was set to 20 deg.
したがって、地盤の材料が砂及び粘土である場合、半頂角θを１５degとした独楽型の転圧輪５０を用いることで締固め効率を可及的に向上させることができ、半頂角θを１５degとした独楽型の転圧輪５０と、同じく半頂角θを１５degとした鼓型の転圧輪４０とを組み合わせて用いることができる。
また、鼓型の転圧輪４０の場合、半頂角θと締固め深度との相関にばらつきがあり、半頂角θを１５degとした場合よりも半頂角θを２０degとした方が締固め深度が深くなるので、鼓型の転圧輪４０と独楽型の転圧輪５０とを組み合わせて用いる場合、例えば半頂角θを１５degに設定した独楽型の転圧輪５０と半頂角θを２０degに設定した鼓型の転圧輪４０とを組み合わせて用いることができる。
Therefore, when the ground material is sand or clay, the compaction efficiency can be improved as much as possible by using a spinning top 50 with a half-top angle θ of 15 deg, and the half-top angle θ can be improved as much as possible. A top-shaped rolling wheel 50 having a half apex angle of 15 deg and a drum-shaped rolling wheel 40 having a half-apical angle of 15 deg can be used in combination.
Further, in the case of the drum-shaped rolling wheel 40, the correlation between the half-top angle θ and the compaction depth varies, and it is better to set the half-top angle θ to 20 deg than to set the half-top angle θ to 15 deg. Since the compaction depth becomes deeper, when the drum-shaped compaction wheel 40 and the top-type compaction wheel 50 are used in combination, for example, the top angle θ is set to 15 deg, and the top-end angle is set to 15 deg. It can be used in combination with a drum-shaped rolling wheel 40 in which θ is set to 20 deg.
また、図８は、地盤の材料が礫及び粘土である場合で、半頂角θを１０deg、１５deg、２０degの３種類に設定したときの締固め度と深度分布の関係を、鼓型の転圧輪４０、独楽型の転圧輪５０それぞれについて検証した結果を示す。
図８に示すように、半頂角θを１５degとした独楽型の転圧輪５０では、各深度における締固め度が安定して高いが、半頂角θを２０degとした独楽型の転圧輪５０では、途中深度で締固め度が小さくなる緩みが発生した。
Further, FIG. 8 shows the relationship between the degree of compaction and the depth distribution when the half apex angle θ is set to three types of 10 deg, 15 deg, and 20 deg in the case where the ground material is gravel and clay. The results of verification of each of the pressure ring 40 and the spinning top 50 are shown.
As shown in FIG. 8, in the spinning top 50 with a half apex angle θ of 15 deg, the degree of compaction at each depth is stable and high, but the spinning top angle θ is 20 deg. In the ring 50, loosening occurred in which the degree of compaction became smaller at the intermediate depth.
したがって、地盤の材料が礫及び粘土である場合、半頂角θを１５degとした独楽型の転圧輪５０を用いることで締固め効率を可及的に向上させることができる。
また、地盤の材料が礫及び粘土である場合で、鼓型の転圧輪４０と独楽型の転圧輪５０とを組み合わせて用いる場合、例えば、半頂角θを１５degに設定した独楽型の転圧輪５０と、締固め深度が最も深くなる半頂角θ＝２０degの鼓型の転圧輪４０とを備えるようにすることができる。
Therefore, when the ground material is gravel or clay, the compaction efficiency can be improved as much as possible by using the spinning top type rolling wheel 50 having a half apex angle θ of 15 deg.
Further, when the ground material is gravel and clay and the drum-shaped rolling wheel 40 and the top-shaped rolling wheel 50 are used in combination, for example, the top angle θ is set to 15 deg. A compaction wheel 50 and a drum-shaped compaction wheel 40 having a half-apical angle θ = 20 deg having the deepest compaction depth can be provided.
なお、半頂角θは５degから２５degまでの間に設定されることが好ましく、更には、上記に説明した地盤材料毎の締固め深度、締固め度と半頂角θとの相関から、１５degから２０degとの間に設定することがより好ましい。
また、地盤材料毎の検証結果から、半頂角θの適正値が地盤材料で変化することが明らかである。そこで、転圧輪の交換が可能なハンドガイドローラ１０では、半頂角θが異なる鼓型の転圧輪４０及び／又は独楽型の転圧輪５０を複数用意し、現場の地盤材料に応じて選択した半頂角θの鼓型の転圧輪４０及び／又は独楽型の転圧輪５０をハンドガイドローラ１０に取り付けることができる。
The half-top angle θ is preferably set between 5 deg and 25 deg, and further, from the correlation between the compaction depth and the degree of compaction and the half-top angle θ described above for each ground material, 15 deg It is more preferable to set it between 1 and 20 deg.
In addition, from the verification results for each ground material, it is clear that the appropriate value of the half apex angle θ changes depending on the ground material. Therefore, in the hand guide roller 10 in which the rolling wheels can be replaced, a plurality of drum-shaped rolling wheels 40 and / or top-shaped rolling wheels 50 having different half-top angles θ are prepared, depending on the ground material at the site. A drum-shaped rolling wheel 40 and / or a top-shaped rolling wheel 50 having a selected half-top angle θ can be attached to the hand guide roller 10.
また、ハンドガイドローラ１０は、鼓型の転圧輪４０と独楽型の転圧輪５０との２本の転圧輪を備える構成に限定されず、鼓型の転圧輪４０、独楽型の転圧輪５０、外径が軸方向に一様な円筒状の転圧輪１００を適宜組み合わせて用いることができる。
つまり、図９に示す鼓型の転圧輪４０と外径が一様な転圧輪１００との２本の組み合わせ、図１０に示す独楽型の転圧輪５０と外径が一様な転圧輪１００との２本の組み合わせ、図１１に示す鼓型の転圧輪４０、独楽型の転圧輪５０、外径が一様な転圧輪１００の３本の組み合わせなどを用いることができる。
Further, the hand guide roller 10 is not limited to a configuration including two rolling wheels of a drum-shaped rolling wheel 40 and a top-shaped rolling wheel 50, and the drum-shaped rolling wheel 40 and a spinning top-type rolling wheel 10 are not limited to the configuration. A compaction ring 50 and a cylindrical compaction ring 100 having a uniform outer diameter in the axial direction can be appropriately combined and used.
That is, a combination of two drum-shaped compaction wheels 40 shown in FIG. 9 and a compaction ring 100 having a uniform outer diameter, and a spinning top 50 shown in FIG. 10 having a uniform outer diameter. It is possible to use a combination of two with the pressure ring 100, a drum-shaped compaction wheel 40 shown in FIG. 11, a top-type compaction wheel 50, and a combination of three compaction wheels 100 having a uniform outer diameter. it can.
なお、鼓型の転圧輪４０、独楽型の転圧輪５０、外径が軸方向に一様な円筒状の転圧輪１００を複数組み合わせて用いる場合、車体の前後方向における並び順は適宜設定できる。
例えば、鼓型の転圧輪４０と独楽型の転圧輪５０との組み合わせにおいて、鼓型の転圧輪４０を前輪とし、独楽型の転圧輪５０を後輪とすることができる。
また、鼓型の転圧輪４０及び／又は独楽型の転圧輪５０と外径が一様な転圧輪１００との組み合わせにおいて、外径が一様な転圧輪１００は、前輪、後輪、中間輪のいずれにも設定できる。但し、外径が一様な転圧輪１００を最も後側に設定すれば、鼓型の転圧輪４０及び／又は独楽型の転圧輪５０による深度方向への締固め範囲の拡大効果を得ながら、ハンドガイドローラ１０が走行した後の地盤表面の凸凹を小さくできる。
When a plurality of drum-shaped compaction wheels 40, top-type compaction wheels 50, and cylindrical compaction wheels 100 having a uniform outer diameter in the axial direction are used in combination, the order of arrangement in the front-rear direction of the vehicle body is appropriate. Can be set.
For example, in the combination of the drum-shaped compaction wheel 40 and the top-type compaction wheel 50, the drum-shaped compaction wheel 40 can be the front wheel and the top-type compaction wheel 50 can be the rear wheel.
Further, in the combination of the drum-shaped compaction wheel 40 and / or the spinning top compaction wheel 50 and the compaction wheel 100 having a uniform outer diameter, the compaction wheel 100 having a uniform outer diameter is the front wheel and the rear wheel. It can be set to either a wheel or an intermediate wheel. However, if the compaction wheel 100 having a uniform outer diameter is set to the rearmost side, the effect of expanding the compaction range in the depth direction by the drum-shaped compaction wheel 40 and / or the top-type compaction wheel 50 can be obtained. While obtaining the above, the unevenness of the ground surface after the hand guide roller 10 has traveled can be reduced.
また、鼓型の転圧輪４０は回転軸ＡＲ方向の中央に１つの凹み部４１を有し、独楽型の転圧輪５０は回転軸ＡＲ方向の中央に１つの出っ張り部５１を有するが、図１２に示すように、ハンドガイドローラ１０は、凹み部４１を回転軸ＡＲ方向に複数並設してなる連続鼓型の転圧輪４５と、出っ張り部５１を回転軸ＡＲ方向に複数並設してなる連続独楽型の転圧輪５５との少なくとも一方を備えることができる。 Further, the drum-shaped compaction wheel 40 has one recess 41 in the center of the rotation axis AR direction, and the top-shaped compaction wheel 50 has one protrusion 51 in the center of the rotation axis AR direction. As shown in FIG. 12, the hand guide roller 10 has a continuous drum-shaped rolling wheel 45 having a plurality of recessed portions 41 arranged side by side in the rotation axis AR direction, and a plurality of protruding portions 51 arranged side by side in the rotation axis AR direction. It can be provided with at least one of the continuous spinning top type rolling wheels 55.
連続鼓型の転圧輪４５は、回転軸ＡＲ方向の一端から他端に向けて連続して形成される第１凹み部４１−１、第２凹み部４１−２、第３凹み部４１−３を有する。各凹み部４１−１，４１−２，４１−３は、転圧輪４５の全長を３等分した領域毎に半頂角θが同じになるように形成され、各凹み部４１−１，４１−２，４１−３の谷４１ｃの深さ（各谷４１ｃでの外径）は同じに設定される。 The continuous drum-shaped compaction ring 45 has a first recessed portion 41-1, a second recessed portion 41-2, and a third recessed portion 41- formed continuously from one end to the other end in the AR direction of the rotation axis. Has 3. The recessed portions 41-1, 41-2, and 43-1 are formed so that the half apex angle θ is the same for each region obtained by dividing the total length of the compaction ring 45 into three equal parts. The depths of the valleys 41c of 41-2 and 41-3 (outer diameters at each valley 41c) are set to be the same.
一方、連続独楽型の転圧輪５５は、回転軸ＡＲ方向の一端から他端に向けて連続して形成される第１出っ張り部５１−１、第２出っ張り部５１−２、第３出っ張り部５１−３を有する。各出っ張り部５１−１，５１−２，５１−３は、転圧輪５５の全長を３等分した領域毎に半頂角θが同じになるように形成され、各出っ張り部５１−１，５１−２，５１−３の頂点５１ｃの高さ（各頂点５１ｃでの外径）は同じに設定される。
上記の連続鼓型の転圧輪４５、連続独楽型の転圧輪５５による転圧では、回転軸ＡＲ方向における締固め深度のばらつきを抑制できる。
On the other hand, in the continuous spinning top type rolling wheel 55, the first protruding portion 51-1, the second protruding portion 51-2, and the third protruding portion are continuously formed from one end to the other end in the rotation axis AR direction. It has 51-3. Each of the protruding portions 51-1, 51-2, and 53-1 is formed so that the half apex angle θ is the same for each region obtained by dividing the total length of the compaction ring 55 into three equal parts. The heights of the vertices 51c of 51-2 and 51-3 (outer diameters at each vertex 51c) are set to be the same.
In the rolling compaction by the continuous drum type compaction wheel 45 and the continuous spinning top type compaction wheel 55, it is possible to suppress the variation in the compaction depth in the rotation axis AR direction.
また、連続鼓型の転圧輪４５と連続独楽型の転圧輪５５との２本を前後に配置したハンドガイドローラ１０の場合、第１凹み部４１−１の谷４１ｃと第１出っ張り部５１−１の頂点５１ｃとが前後方向に沿って一列に並ぶとともに、第２凹み部４１−２の谷４１ｃと第２出っ張り部５１−２の頂点５１ｃとが前後方向に沿って一列に並び、更に、第３凹み部４１−３の谷４１ｃと第３出っ張り部５１−３の頂点５１ｃとが前後方向に沿って一列に並ぶ。 Further, in the case of the hand guide roller 10 in which two continuous drum-shaped rolling wheels 45 and a continuous spinning top-shaped rolling wheel 55 are arranged in the front-rear direction, the valley 41c of the first recessed portion 41-1 and the first protruding portion 51 The vertices 51c of -1 are lined up in a row along the front-rear direction, the valley 41c of the second recess 41-2 and the apex 51c of the second protrusion 51-2 are lined up in a row along the front-back direction, and further. , The valley 41c of the third recess 41-3 and the apex 51c of the third protrusion 51-3 are lined up in a row along the front-rear direction.
そして、連続鼓型の転圧輪４５の谷４１ｃと連続独楽型の転圧輪５５の頂点５１ｃとが前後方向に沿ってそれぞれ並ぶことで、相互に転圧が弱くなる領域を補うことができ、左右方向における締固め深度のばらつきをより小さくできる。
なお、凹み部４１や出っ張り部５１を軸方向に並設する数は、図１２に例示した３個に限定されるものではなく、２個或いは４個以上とすることができる。
Then, by arranging the valley 41c of the continuous drum-shaped rolling wheel 45 and the apex 51c of the continuous spinning top 55 along the front-rear direction, it is possible to supplement the region where the rolling compaction is weakened with each other. , The variation in compaction depth in the left-right direction can be made smaller.
The number of recessed portions 41 and protruding portions 51 arranged side by side in the axial direction is not limited to the three illustrated in FIG. 12, but may be two or four or more.
また、連続鼓型の転圧輪４５及び／又は連続独楽型の転圧輪５５と、外径が軸方向に一様な円筒状の転圧輪１００とを組み合わせて用いたり、凹み部４１を回転軸ＡＲ方向の中央に１つ有する鼓型の転圧輪４０及び／又は出っ張り部５１を回転軸ＡＲ方向の中央に１つ有する独楽型の転圧輪５０と、連続鼓型の転圧輪４５及び／又は連続独楽型の転圧輪５５とを組み合わせたりすることができる。 Further, a continuous drum type rolling wheel 45 and / or a continuous spinning top type rolling wheel 55 and a cylindrical rolling wheel 100 having a uniform outer diameter in the axial direction may be used in combination, or a recessed portion 41 may be used. A top-shaped rolling wheel 40 having one in the center of the rotation axis AR direction and / or a top-shaped rolling wheel 50 having one protruding portion 51 in the center of the rotation axis AR direction, and a continuous drum-shaped rolling wheel 45 and / or a continuous spinning top type rolling wheel 55 can be combined.
また、ハンドガイドローラ１０は、連続鼓型の転圧輪４５を複数備えたり、連続独楽型の転圧輪５５を複数備えたりすることができる。連続鼓型の転圧輪４５又は連続独楽型の転圧輪５５を複数備える場合、転圧輪毎に凹み部４１、出っ張り部５１の数を異ならせることができる。また、前側の連続鼓型の転圧輪４５における谷４１ｃの位置と、後側の連続鼓型の転圧輪４５における谷４１ｃの位置とが左右方向にずれ、前側の連続独楽型の転圧輪５５における頂点５１ｃの位置と、後側の連続独楽型の転圧輪５５における頂点５１ｃの位置とが左右方向にずれるように設定することができる。 Further, the hand guide roller 10 may be provided with a plurality of continuous drum type rolling wheels 45, or may be provided with a plurality of continuous spinning top type rolling wheels 55. When a plurality of continuous drum type rolling wheels 45 or continuous spinning top type rolling wheels 55 are provided, the number of recessed portions 41 and protruding portions 51 can be made different for each rolling compact wheel. Further, the position of the valley 41c on the front continuous drum-shaped rolling wheel 45 and the position of the valley 41c on the rear continuous drum-shaped rolling wheel 45 are displaced in the left-right direction, and the front continuous spinning top type rolling compaction. The position of the apex 51c on the ring 55 and the position of the apex 51c on the rear continuous spinning top 55 can be set so as to deviate in the left-right direction.
以上、好ましい実施形態を参照して本発明の内容を具体的に説明したが、本発明の基本的技術思想及び教示に基づいて、当業者であれば種々の変形態様を採り得ることは自明である。
例えば、凹み部４１及び出っ張り部５１の回転軸ＡＲ方向に向かって徐々に縮径／拡径するテーパー部分は、軸線（回転軸ＡＲ）に対する母線の傾斜角が一定である円錐面に形成されるが、徐々に縮径／拡径する途中で母線の傾斜角が少なくとも１回切り替わるようにして円錐面を多段に形成させることができる。
Although the contents of the present invention have been specifically described with reference to the preferred embodiments, it is obvious that a person skilled in the art can adopt various modifications based on the basic technical idea and teaching of the present invention. is there.
For example, the tapered portion of the recessed portion 41 and the protruding portion 51 that gradually reduces / expands in diameter toward the rotation axis AR is formed on a conical surface in which the inclination angle of the generatrix with respect to the axis (rotation axis AR) is constant. However, the conical surface can be formed in multiple stages so that the inclination angle of the generatrix is switched at least once during the gradual reduction / expansion of the diameter.
また、円弧状の母線を転圧輪の回転軸ＡＲ周りに回転させて形成される回転体によって、凹み部及び／又は出っ張り部のテーパー部分を形成することができる。
また、凹み部４１の谷４１ｃ及び／又は出っ張り部５１の頂点５１ｃが、軸方向に所定長さ範囲で外径が一定な円筒部で形成されることができる。
Further, a tapered portion of a recessed portion and / or a protruding portion can be formed by a rotating body formed by rotating an arc-shaped bus around the rotation axis AR of the compaction wheel.
Further, the valley 41c of the recessed portion 41 and / or the apex 51c of the protruding portion 51 can be formed as a cylindrical portion having a constant outer diameter within a predetermined length range in the axial direction.
また、凹み部４１と出っ張り部５１との少なくも一方を有する転圧輪を備えた締固め機械は、ハンドガイドローラ１０に限定されず、前輪が凹み部４１及び／又は出っ張り部５１を備えた転圧輪で、後輪がゴム製タイヤで構成される締固め機械や、凹み部４１及び／又は出っ張り部５１を備えた転圧輪（鉄輪）とタイヤローラとを組み合わせた締固め機械とすることができ、更に、運転席を備え、運転席に乗った作業者が操作を行う中型、大型の締固め機械とすることができる。 Further, the compaction machine provided with a compaction wheel having at least one of the recessed portion 41 and the protruding portion 51 is not limited to the hand guide roller 10, and the front wheel is rolled having the recessed portion 41 and / or the protruding portion 51. A compaction machine with a compaction wheel whose rear wheels are made of rubber tires, or a compaction machine that combines a compaction wheel (iron wheel) having a recessed portion 41 and / or a protruding portion 51 and a tire roller. In addition, it can be a medium-sized or large-sized compaction machine equipped with a driver's seat and operated by an operator in the driver's seat.
１０…ハンドガイドローラ（締固め機械）、４０…転圧輪、４１…凹み部、４１ａ，４１ｂ…テーパー部分（円錐面）、４１ｃ…谷、５０…転圧輪、５１…出っ張り部、５１ａ，５１ｂ…テーパー部分（円錐面）、５１ｃ…頂点 10 ... Hand guide roller (compacting machine), 40 ... Rolling wheel, 41 ... Recessed part, 41a, 41b ... Tapered part (conical surface), 41c ... Valley, 50 ... Rolling wheel, 51 ... Protruding part, 51a, 51b ... Tapered part (conical surface), 51c ... Apex
Claims (6)
前記転圧輪は、
回転軸方向の一端から他端に向かって外径を徐々に縮径した後徐々に拡径した凹み部を少なくとも１つ有する第１転圧輪と、回転軸方向の一端から他端に向かって外径を徐々に拡径した後徐々に縮径した出っ張り部を少なくとも１つ有する第２転圧輪とを車体前後に備え、
前記第１転圧輪の前記凹み部と前記第２転圧輪の前記出っ張り部とが車体前後方向に沿って並ぶ、
締固め機械。 Equipped with a rolling wheel with a circular cross section,
The compaction wheel
A first compaction wheel having at least one recessed portion whose outer diameter is gradually reduced from one end to the other end in the rotation axis direction and then gradually expanded, and from one end to the other end in the rotation axis direction. The front and rear of the vehicle body are provided with a second compaction wheel having at least one protruding portion whose outer diameter is gradually increased and then gradually reduced .
The recessed portion of the first compaction wheel and the protruding portion of the second compaction wheel are lined up along the front-rear direction of the vehicle body.
Compaction machine.
前記第２転圧輪は、前記出っ張り部を回転軸方向の中央に１つ有する、
請求項１記載の締固め機械。 The first compaction wheel has one recessed portion in the center in the rotation axis direction.
The second compaction wheel has one protruding portion in the center in the direction of the rotation axis.
The compaction machine according to claim 1.
前記第２転圧輪は、前記出っ張り部を回転軸方向に複数並設して有する、
請求項１記載の締固め機械。 The first compaction wheel has a plurality of recessed portions arranged side by side in the direction of rotation axis.
The second compaction wheel has a plurality of protruding portions arranged side by side in the direction of the rotation axis.
The compaction machine according to claim 1.
請求項１から請求項３のいずれか１つに記載の締固め機械。 At least one of the recessed portion and the protruding portion has a conical surface formed with a tapered portion whose outer diameter is gradually increased or reduced from one end in the rotation axis direction toward the other end.
The compaction machine according to any one of claims 1 to 3 .
請求項４記載の締固め機械。 The half apex angle of the conical surface is set between 5 deg and 25 deg.
The compaction machine according to claim 4 .
請求項１から請求項５のいずれか１つに記載の締固め機械。 The compaction machine is a hand guide roller capable of replacing the compaction wheel.
The compaction machine according to any one of claims 1 to 5 .
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