JP2014240783A

JP2014240783A - Hammering device for damaged part inspection inside of road

Info

Publication number: JP2014240783A
Application number: JP2013123075A
Authority: JP
Inventors: 正三熊田; Shozo Kumada
Original assignee: Tsutai Co Ltd
Current assignee: Tsutai Co Ltd
Priority date: 2013-06-11
Filing date: 2013-06-11
Publication date: 2014-12-25
Anticipated expiration: 2033-06-11
Also published as: JP5651739B2

Abstract

PROBLEM TO BE SOLVED: To provide a hammering device in which each apex of an outer periphery of a rotation hammering tool does not slide and move on a road surface and contacts to the road surface with an equal interval and contacts to the road by impulsive grounding when a rotation hammering tool 2 is moved on the road in a state that the rotation hammering tool 2 is linked to a bogie 1.SOLUTION: A shape of an outer periphery 21 of a body 20 of a rotation hammering tool 2 is a polygon. When the body 20 is rotated on the road surface, each apex 22 of the outer periphery 21 contacts to a road surface 41 with an equal interval by impulsive grounding with outputting impact sound. The rotation hammering tool 2 is configured by the above-mentioned structure. The rotation hammering tool 2 is linked to a bogie 1 so as to track the bogie 1, an axle 15 of a wheel 14 of the bogie 1 and a central axis 25 of the body 20 of the rotation hammering tool are coupled with a belt 57 so that the central axis 25 of the body 20 of the rotation hammering tool rotates while maintaining a constant relationship with movement of the outer peripheral surface of the wheel 14, and contacts to the road surface 41 by impulsive grounding with the equal interval 24 without sliding.

Description

本発明は、自動車等の移動車両の輪荷重を直接負担する道路（床版を含む、以下単に道路又は床版と称する）の路面を叩くことにより、打音を発生させ、発生する打音の変化により損傷部の有無を判別するために用いられる道路内部の損傷部調査用打音装置に関する。 The present invention generates a hitting sound by hitting the road surface of a road (including a floor slab, hereinafter simply referred to as a road or a floor slab) that directly bears the wheel load of a moving vehicle such as an automobile. The present invention relates to a hitting device for investigating a damaged portion inside a road, which is used for determining the presence or absence of a damaged portion by a change.

従来より、路面に添って台車を押し進めることにより、回動打音器を追従させて、大きな衝撃音を発生させ、道路の内部における損傷部の有無に対応する衝撃音を発生させる打音装置は、例えば特許文献１に示されるように知られている。
上記特許文献１に示される打音装置は、次のように構成されている。回動打音器の本体の断面形状は、外周が多角形に形成され、路面上を回動させるときには外周の各頂点が等間隔で次々と路面に対して衝撃的接地して衝撃音を発する。
上記回動打音器の本体は台車に連結し、台車で引いて路面上を移動させ、次々と衝撃音を発生させる。各頂点から次々と発生する衝撃音の音圧レベルが、道路内部に損傷部が有る場合と、道路内部に損傷部が無い場合とでは相違することを利用して、道路の内部における損傷部の有無を探知する。 Conventionally, a hammering device that pushes a carriage along a road surface to cause a rotary hammer to follow and generates a large impact sound, and generates an impact sound corresponding to the presence or absence of a damaged portion inside the road. For example, it is known as shown in Patent Document 1.
The sound hitting device disclosed in Patent Document 1 is configured as follows. The cross-sectional shape of the main body of the rotating sounding device is formed in a polygonal outer periphery, and when rotating on the road surface, each vertex of the outer periphery makes a shocking contact with the road surface one after another at equal intervals and emits an impact sound. .
The main body of the rotating sounding device is connected to a carriage, pulled by the carriage and moved on the road surface, and generates impact sounds one after another. Using the fact that the sound pressure level of the impact sound generated from each apex is different between when there is a damaged part inside the road and when there is no damaged part inside the road, Detect presence or absence.

特開２０１３−１９８０８号公報JP 2013-19808 A

上記回動打音器の本体を、台車に連結し、台車を押し進めることにより回動打音器の本体を追従させる場合、調査対象とする道路の表面が荒れていて、粗面になっている場合は、回動打音器本体の外周における多角形の各頂点が、その粗面の抵抗を受けて滑ること無く予定通り等間隔に回動して、次々と衝撃音を発生する。
しかし、上記道路の表面における仕上げの状態が、丁寧で、鏡面のようにツルツルに仕上げられていた場合、或いは、下り勾配の坂道においては、回動打音器本体の外周における多角形の各頂点は、台車を押し進めることにより、夫々路面上を滑動することが多く、回動打音器本体は、回動したり、回動しなかったりを、不規則に繰り返しながら進行し、その結果、打点間隔が等間隔にならず、打点されない区間が長くなって、調査データの信頼性が低下する問題点があった。 When the main body of the rotary sounder is connected to the carriage and the main body of the rotary sounder is made to follow by pushing the carriage, the surface of the road to be investigated is rough and rough. In this case, each of the polygonal vertices on the outer periphery of the rotary sounder main body rotates at regular intervals as planned without receiving slippage due to the resistance of the rough surface, and generates impact sounds one after another.
However, when the finish on the road surface is polite and smooth like a mirror surface, or on a downward slope, each vertex of the polygon on the outer periphery of the rotary sounder body Are often slid on the road surface by pushing the carriage, and the rotating sounder main body advances while rotating or not rotating irregularly. There was a problem that the reliability of the survey data was lowered because the intervals were not equal and the section where no points were hit became long.

その為、出願人会社において、回動打音器の本体の外周の角数を増加させて、滑動することなく回動し易い構成にしてみた。しかし角数を増やすと、コロコロと、回動し易くなるが、回動打音器本体が回動したときの各頂点の衝撃音は小さくなり、道路内部に損傷部が有るのか、無いのかの判別が困難になる精度上の問題点が発生した。
このような事情から、回動打音器の本体の外周の角数は、回動したときの各頂点の衝撃音を大きくするためには少ない方が望ましい。 For this reason, the applicant company tried to increase the number of corners of the outer periphery of the rotary sounder so that it can easily rotate without sliding. However, if the number of corners is increased, it will be easier to rotate, but the impact sound at each apex when the rotating sounding instrument body rotates will be small, whether there is a damaged part inside the road or not An accuracy problem that makes it difficult to distinguish has occurred.
For this reason, it is desirable that the number of corners on the outer periphery of the main body of the rotary sounder is small in order to increase the impact sound at each vertex when the rotary sounder rotates.

本件出願の目的は、上記課題を解決するもので、
台車と、回動打音器と、これらの連係機構を備えることにより、道路内部の損傷部の調査に用いることのできる打音装置を提供しようとするものである。
他の目的は、移動中、台車が上下動しても、台車の上下動が回動打音器を揺動させる等の悪影響を及ぼして回動打音器からの打音に斑を発生させることのないようにしてある打音装置を提供しようとするものである。
他の目的は、回動打音器の外周の形状を、角数の少ない多角形にしても、各頂点は、路面上を誤って滑り進む恐れがなく、正確に自体の先鋭角の間隔寸法に対応するピッチ分だけ進んで等間隔で衝撃音を発生するようにした打音装置を提供しようとするものである。
他の目的は、回動打音器の本体の外周面の角数を少なくして、回動し難く構成しても、回動打音器の本体は順調に、かつ正確に回動して、路面に対して滑動することなく、鋭く衝撃的接地させることができ、大きな衝撃音を出させることのできるようにした打音装置を提供しようとするものである。
他の課題、目的及び利点は図面及びそれに関連した以下の説明により容易に明らかになるであろう。 The purpose of this application is to solve the above problems.
By providing a cart, a rotating sounding device, and a linkage mechanism of these, it is intended to provide a sounding device that can be used for investigating damaged parts inside the road.
Another purpose is that even if the carriage moves up and down during movement, the vertical movement of the carriage has an adverse effect such as swinging the rotating sounder, and the sound generated from the rotating sounder is spotted. The present invention intends to provide a certain sounding device.
The other purpose is that even if the outer periphery of the rotary sounder is made into a polygon with a small number of corners, each apex does not have the risk of accidentally sliding on the road surface, and the distance between the corners of its own sharp angle is accurate. It is an object of the present invention to provide a sound hitting device that is advanced by an amount corresponding to the pitch and generates impact sounds at equal intervals.
Another purpose is to make the main body of the rotating sounder smoothly and accurately rotate even if the number of the outer peripheral surfaces of the main body of the rotating sounder is reduced to make it difficult to rotate. An object of the present invention is to provide a sound hitting device that can be grounded sharply and impactlessly without sliding on the road surface, and can generate a large impact sound.
Other problems, objects and advantages will be readily apparent from the drawings and the following description associated therewith.

本発明における道路内部の損傷部調査用打音装置は、
中心軸25を回転中心にして回動自在に形成してある回動打音器2の本体２０であって、その本体20の断面の外周21の形状は多角形で、上記本体20を路面上において回動させるときには外周21の各頂点22が等間隔24で路面41に対して衝撃的接地して衝撃音を発するように外周21における各頂点22は、夫々突設させてある回動打音器2の本体２０を備え、
さらに、路面41上を移動可能に車輪１４によって支持されている台車１を備え、上記回動打音器2の本体２０は、台車１の進行に伴って台車１と同方向に向けて、路面41に接する状態で回動して、台車１に追従するように、上記台車１に対して連係機構4を介して連係してあり、
上記台車１と、回動打音器本体２０の中心軸25との連係機構4を介しての連係状態は、回動打音器2の本体２０の回動に伴い回動打音器2の本体２０の中心軸25が、台車１に対し、上下方向56に揺動することを許容するように支持してあり、
さらに上記車輪１４の車軸１５は、車輪１４と一体的な回動を可能に構成し、上記車軸１５と上記回動打音器本体２０と一体回動可能にしてある中心軸25とは、上記車輪１４の外周面が路面に接する状態で進行方向へ向けて回動している状態においては、上記回動打音器本体２０の中心軸25が、上記車輪１４の外周面の動きに一定の関連を維持した状態で回動し、上記回動打音器本体２０の外周21の各頂点22が路面41の上に対して滑動することなく等間隔24で路面41に対して衝撃的接地するようにベルト５７で連携してある。 The sounding device for investigating a damaged portion inside the road in the present invention is
The main body 20 of the rotary sounding device 2 is formed so as to be rotatable about a central axis 25. The outer periphery 21 of the cross section of the main body 20 is polygonal, and the main body 20 is placed on the road surface. Rotating hammering sound that each vertex 22 in the outer periphery 21 is projected so that each vertex 22 of the outer periphery 21 impacts the ground 41 at an equal interval 24 and makes an impact sound when rotating A main body 20 of the vessel 2,
Further, the vehicle has a carriage 1 supported by wheels 14 so as to be movable on the road surface 41, and the main body 20 of the rotary sounding device 2 is directed in the same direction as the carriage 1 as the carriage 1 travels. It is linked to the cart 1 via the linkage mechanism 4 so as to rotate in contact with 41 and follow the cart 1;
The linkage state between the cart 1 and the central shaft 25 of the rotary sounder main body 20 via the linkage mechanism 4 is that the rotary sounder 2 rotates as the main body 20 of the rotary sounder 2 rotates. The center shaft 25 of the main body 20 is supported so as to be allowed to swing in the vertical direction 56 with respect to the carriage 1.
Further, the axle 15 of the wheel 14 is configured to be able to rotate integrally with the wheel 14, and the axle 15 and the central shaft 25 that can rotate integrally with the rotating sounder main body 20 are the above-mentioned In a state where the outer peripheral surface of the wheel 14 is rotating in the traveling direction with the road surface being in contact with the road surface, the central shaft 25 of the rotating sounding instrument body 20 is constant in the movement of the outer peripheral surface of the wheel 14. Rotating while maintaining the relation, each apex 22 of the outer periphery 21 of the rotary sounding instrument main body 20 does not slide on the road surface 41, and is grounded to the road surface 41 at equal intervals 24. As shown in FIG.

また好ましくは、中心軸25を回転中心にして回動自在に形成してある回動打音器2の本体２０であって、その本体20の断面の外周21の形状は多角形で、上記本体20を路面上において回動させるときには外周21の各頂点22が等間隔24で路面41に対して衝撃的接地して衝撃音を発するように外周21における各頂点22は、夫々突設させてある回動打音器2の本体２０を備え、
さらに、路面41上を移動可能に複数の車輪１４によって支持されている台車１を備え、上記回動打音器2の本体２０は、台車１の進行に伴って台車１と同方向に向けて、路面41に接する状態で回動して、台車１に追従するように、上記台車１に対して連係機構4を介して連係してあり、
上記台車１と、回動打音器本体２０の中心軸25との連係機構4を介しての連係状態は、回動打音器2の本体２０の回動に伴い回動打音器2の本体２０の中心軸25が、台車１に対し、上下方向56に揺動することを許容するように支持してあり、
さらに上記台車１の前部の両側にあっては、夫々上記の車輪14、14を配設すると共に、その両側の車輪14、14は連係軸１６で一体回動可能に連結し、その連係軸１６は、上記台車１に対して回転自在に備えさせ、上記連係軸１６と上記回動打音器本体２０と一体回動可能にしてある中心軸25とは、上記台車１の前部の両側の車輪14、14の外周面が路面に接する状態で進行方向へ向けて回動している状態においては、上記回動打音器本体２０の中心軸25が、上記車輪14、14の外周面の動きに一定の関連を維持した状態で駆動され、上記回動打音器本体２０の外周21の各頂点22が滑動することなく等間隔24で路面41に対して衝撃的接地するように、上記回動打音器本体２０の中心軸25と、上記台車１の前部の両側にある車輪14、14との間の連係軸１６とはベルト５７で連携してある。 Preferably, the main body 20 of the rotary sounding device 2 is formed so as to be rotatable about a central axis 25, and the shape of the outer periphery 21 of the cross section of the main body 20 is a polygon. When the 20 is rotated on the road surface, each vertex 22 on the outer periphery 21 protrudes so that each vertex 22 on the outer periphery 21 strikes the road surface 41 at an equal interval 24 and makes an impact sound. It has a main body 20 of a rotary sounding device 2,
In addition, a carriage 1 is provided that is supported by a plurality of wheels 14 so as to be movable on the road surface 41, and the main body 20 of the rotary sound generator 2 is directed in the same direction as the carriage 1 as the carriage 1 travels. , It is linked to the cart 1 via the linkage mechanism 4 so as to rotate in contact with the road surface 41 and follow the cart 1;
The linkage state between the cart 1 and the central shaft 25 of the rotary sounder main body 20 via the linkage mechanism 4 is that the rotary sounder 2 rotates as the main body 20 of the rotary sounder 2 rotates. The center shaft 25 of the main body 20 is supported so as to be allowed to swing in the vertical direction 56 with respect to the carriage 1.
Further, on both sides of the front portion of the carriage 1, the above-described wheels 14 and 14 are disposed, and the wheels 14 and 14 on both sides thereof are connected together by a linkage shaft 16 so as to be integrally rotatable. 16 is provided so as to be rotatable with respect to the cart 1, and the link shaft 16 and the central shaft 25 that can rotate integrally with the rotary sounder main body 20 are both sides of the front portion of the cart 1. In the state where the outer peripheral surfaces of the wheels 14 and 14 are rotating in the traveling direction in a state where the wheels 14 and 14 are in contact with the road surface, the central shaft 25 of the rotating sounding instrument main body 20 is the outer peripheral surface of the wheels 14 and 14. So that each vertex 22 of the outer periphery 21 of the rotary sounder main body 20 is slid to the road surface 41 at equal intervals 24 without sliding. The linkage shaft 16 between the central shaft 25 of the rotary sounding device main body 20 and the wheels 14 and 14 on both sides of the front portion of the carriage 1 is a bell. 57 is linked.

また好ましくは、中心軸25を回転中心にして回動自在に形成してある回動打音器2の本体２０であって、その本体20の断面の外周21の形状は多角形で、上記本体20を路面上において回動させるときには外周21の各頂点22が等間隔24で路面41に対して衝撃的接地して衝撃音を発するように外周21における各頂点22は、夫々突設させてある回動打音器2の本体２０を備え、
さらに、路面41上を移動可能に複数の車輪１４によって支持されている台車１を備え、上記回動打音器2の本体２０は、台車１の進行に伴って台車１と同方向に向けて、路面41に接する状態で回動して、台車１に追従するように、上記台車１に対して連係機構4を介して連係してあり、
上記台車１と、回動打音器本体２０の中心軸25との連係機構4を介しての連係状態は、上記台車１の前部の両側にあっては、夫々上記の車輪14、14を配設すると共に、その両側の車輪14、14は連係軸１６で一体回動可能に連結し、
上記連係機構4は、回動打音器2の本体２０の回動に伴い回動打音器2の本体２０の中心軸25が、台車１に対し、上下方向56に揺動することを許容するように上記車輪14、14の連係軸１６に対して揺動自在に装着してあり、
さらに上記の連係軸１６は、上記台車１に対して回転自在に備えさせ、上記連係軸１６と上記回動打音器本体２０と一体回動可能にしてある中心軸25とは、上記台車１の前部の両側の車輪14、14の外周面が路面に接する状態で進行方向へ向けて回動している状態においては、上記回動打音器本体２０の中心軸25が、上記車輪14、14の外周面の動きに一定の関連を維持した状態で駆動され、上記回動打音器本体２０の外周21の各頂点22が滑動することなく等間隔24で路面41に対して衝撃的接地するように、上記回動打音器本体２０の中心軸25と、上記台車１の前部の両側にある車輪14、14との間の連係軸１６とはベルト５７で連携してある。 Preferably, the main body 20 of the rotary sounding device 2 is formed so as to be rotatable about a central axis 25, and the shape of the outer periphery 21 of the cross section of the main body 20 is a polygon. When the 20 is rotated on the road surface, each vertex 22 on the outer periphery 21 protrudes so that each vertex 22 on the outer periphery 21 strikes the road surface 41 at an equal interval 24 and makes an impact sound. It has a main body 20 of a rotary sounding device 2,
In addition, a carriage 1 is provided that is supported by a plurality of wheels 14 so as to be movable on the road surface 41, and the main body 20 of the rotary sound generator 2 is directed in the same direction as the carriage 1 as the carriage 1 travels. , It is linked to the cart 1 via the linkage mechanism 4 so as to rotate in contact with the road surface 41 and follow the cart 1;
The linkage state between the carriage 1 and the central shaft 25 of the rotary sounder main body 20 via the linkage mechanism 4 is such that the wheels 14 and 14 are respectively connected to both sides of the front portion of the carriage 1. The wheels 14 and 14 on both sides thereof are connected by a linkage shaft 16 so as to be integrally rotatable,
The linkage mechanism 4 allows the central axis 25 of the main body 20 of the rotary sounder 2 to swing in the vertical direction 56 with respect to the carriage 1 as the main body 20 of the rotary sounder 2 rotates. As described above, the wheels 14 and 14 are pivotally attached to the linkage shaft 16;
Further, the linkage shaft 16 is provided so as to be rotatable with respect to the cart 1, and the linkage shaft 16 and the central shaft 25 that can rotate integrally with the rotary sounder main body 20 are the same as those of the cart 1. In the state where the outer peripheral surfaces of the wheels 14, 14 on both sides of the front part of the front wheel are rotating in the traveling direction with the road surface being in contact with the road surface, the central shaft 25 of the rotary sounding instrument body 20 is 14 is driven in a state in which a certain relation is maintained with the movement of the outer peripheral surface of 14, and each apex 22 of the outer peripheral surface 21 of the rotary sounder main body 20 is shocked against the road surface 41 at equal intervals 24 without sliding. The center shaft 25 of the rotary sounding instrument main body 20 and the linkage shaft 16 between the wheels 14 and 14 on both sides of the front portion of the carriage 1 are linked by a belt 57 so as to be grounded.

また好ましくは、上記回動打音器本体２０の中心軸25に対しては、回転数検出装置のセンサを、上記回動打音器本体２０の回転数の検出を可能に付設すると良い。 Preferably, a sensor of a rotational speed detection device is attached to the central shaft 25 of the rotary sounder main body 20 so that the rotational speed of the rotational sounder main body 20 can be detected.

また好ましくは、上記連繋部材３３には、上記回動打音器本体２０を路面41から持ち上げて離反させるための持上部材66を備えさせるとよい。 Preferably, the linking member 33 is provided with a lifting member 66 for lifting the rotating sounder main body 20 from the road surface 41 and separating it.

以上のように本発明は、例えばコンクリート舗装されている広い道路において、
道路の内部における損傷部４８の調査をする場合、作業員は、単に路面上を、軽々と台車を押し進めることにより、回動打音器の本体２０を追従させながら回動させ、打音器の本体２０の周囲に備える複数の突出状の各頂点を夫々路面に衝突させ、夫々の各頂点を発音部とし、そこから、「損傷部に対応する音圧レベル」、又は、「損傷部が無い場合に対応する音圧レベル」を発生させ、道路内部の損傷部の有無を判別調査することができる特長がある。 As described above, the present invention is, for example, in a wide road that is paved with concrete.
When investigating the damaged portion 48 inside the road, the worker simply pushes the carriage on the road surface to rotate the main body 20 of the rotary sounder while following it. A plurality of projecting vertices provided around the body 20 are caused to collide with the road surface, and each vertice is used as a sounding portion, from which “sound pressure level corresponding to the damaged portion” or “no damaged portion exists” "Sound pressure level corresponding to the case" is generated, and the presence or absence of a damaged part inside the road can be discriminated and investigated.

その上本発明にあっては、台車と回動打音器の本体２０との連係状態は、回動打音器の本体２０の中心部の上下方向の揺動を許容するように支持するものであるから、台車が、路面の都合によって上下に揺動することがあっても、台車の上下の揺動に追従して回動打音器の本体２０が浮き沈みする恐れはなく、路面上を正確に回動し、次々と衝撃的に接地して道路内部の状況に対応した良質の衝撃音を信頼性高く発する効果がある。 Furthermore, in the present invention, the linkage state between the carriage and the main body 20 of the rotary sounder is supported so as to allow the center part of the main body 20 of the rotary sounder to swing in the vertical direction. Therefore, even if the cart may swing up and down due to the circumstances of the road surface, there is no fear that the main body 20 of the rotary sounder will rise and fall following the up and down swing of the cart, and on the road surface. It has the effect of accurately rotating and grounding one after another in a reliable manner to produce a high-quality impact sound corresponding to the situation inside the road with high reliability.

その上、回動打音器2の本体20の断面の外周形状が多角形であって、回動し難い形状であるが故に、調査の対象とする路面上が滑り易い鏡面のような滑面であったり、或いは、下り勾配の路面上であったりする場合には、前述のように、回動打音器本体20は、回動したり、回動しなかったりして不規則に回動する恐れがあるが、本発明にあっては、車輪１４と一体的な回動を可能に構成してある車軸１５と、上記回動打音器本体２０の中心軸25とは、上記車輪１４の外周面が路面に接する状態で進行方向へ向けて回動している状態においては、上記回動打音器本体２０の中心軸25が、上記車輪１４の外周面の動きに一定の関連を維持した状態で回動するようにベルト５７で連携してあるので、上記回動打音器本体２０の外周21の各頂点22が滑動することはなく、等間隔24で路面41に対して衝撃的接地する特長がある。即ち、上記回動打音器２の外周形状が多角形で、角数だけ、鋭い頂点２２を備えていても各頂点22は、路面上を誤って滑り進む恐れはなく、正確に自体の頂点22の相互の間隔寸法に対応するピッチ分だけ進んで等間隔で衝撃音を発生する特長がある。
このことは調査の対象とする路面上が滑り易い場合において打点されない区間が不規則に長くなって、調査データの信頼性を低下させる問題点を解決する上に効果がある。 In addition, since the outer peripheral shape of the cross section of the main body 20 of the rotary sounding device 2 is a polygon and is difficult to rotate, a smooth surface such as a mirror surface that is easy to slide on the road surface to be investigated. If it is, or on a downhill road surface, as described above, the rotating sounder main body 20 rotates or does not rotate irregularly. However, in the present invention, the axle 15 configured to be capable of rotating integrally with the wheel 14 and the central shaft 25 of the rotating sounder main body 20 are connected to the wheel 14. In the state where the outer peripheral surface of the rotary sounding device is rotating in the traveling direction with the road surface in contact with the road surface, the central shaft 25 of the rotary sound hitting body 20 has a certain relation to the movement of the outer peripheral surface of the wheel 14. Since the belt 57 cooperates with the belt 57 so as to rotate in a maintained state, each vertex 22 of the outer periphery 21 of the rotating sounder main body 20 slides. There is no such thing, and there is a feature that it makes an impact ground contact with the road surface 41 at equal intervals 24. That is, even if the outer peripheral shape of the rotary sounding device 2 is polygonal and has sharp vertices 22 as many as the number of corners, each vertex 22 is not likely to slip accidentally on the road surface. It has the feature of generating impact sound at equal intervals by advancing by a pitch corresponding to 22 mutual spacing dimensions.
This is effective in solving the problem of reducing the reliability of the survey data due to irregularly long sections that are not hit when the road surface to be surveyed is slippery.

さらに本発明にあっては、上記回動打音器本体２０の中心軸25は、台車１の進行時には、車輪１４の回動によって、外周面の移動に同期的駆動される特長があるので、回動打音器の本体２０の外周面の角数を少なくして、回動し難く構成しても、回動打音器の本体２０は順調に、かつ正確に回動して、路面41に対して鋭く衝撃的接地させることができ、大きな衝撃音を出させ、正確な調査を行うことのできる効果がある。 Further, according to the present invention, the central shaft 25 of the rotary sounding instrument main body 20 has a feature that it is driven synchronously with the movement of the outer peripheral surface by the rotation of the wheel 14 when the carriage 1 travels. Even if the number of corners of the outer peripheral surface of the main body 20 of the rotary sounder is reduced to make it difficult to rotate, the main body 20 of the rotary sounder smoothly and accurately rotates, and the road surface 41 Can be grounded sharply and shockingly, and a large impact sound can be produced for an accurate investigation.

道路の平面図。Top view of the road. 図１におけるII−II位置拡大断面図。II-II position expanded sectional view in FIG. 打音装置の斜視図。FIG. 打音装置の平面図。FIG. (A)は、図４におけるV−V位置断面図。(B)は、回動打音器の本体２０を図５(C)の右側から見た側面図。(C)は、回動打音器の本体２０の斜視図。(A) is VV position sectional drawing in FIG. (B) is the side view which looked at the main body 20 of the rotation sound generator from the right side of FIG. 5 (C). (C) is a perspective view of the main body 20 of the rotary sounding device. 図４におけるVI−VI位置断面図。VI-VI position sectional drawing in FIG. (A)は、回動打音器の本体２０における外周の各頂点が一定の寸法間隔で路面に接することにより発する衝撃的接地音の音圧レベルの変化を表す図。 (B)は、回動打音器の本体２０における外周の各頂点が一定の寸法間隔で路面に接することにより発する衝撃的接地音をスペクトログラムで表す図。(A) is a figure showing the change of the sound pressure level of the shocking grounding sound which occurs when each vertex of the outer periphery in the main body 20 of a rotary sounding instrument contacts a road surface at a fixed dimensional interval. (B) is a diagram showing a spectrogram of a shocking grounding sound that is generated when each apex on the outer periphery of the main body 20 of the rotary sounding instrument comes into contact with the road surface at a constant dimensional interval. 図３の打音装置に、付属品が付設されている状態の打音装置の斜視図。FIG. 4 is a perspective view of the sounding device in a state in which accessories are attached to the sounding device of FIG. 3. (A)は、回動打音器の本体の側方に付設してある回転数検出用のセンサ部の説明用部分模式図。(B)は、図９(A)の矢印IX方向から見た近接センサ検出用円盤の正面図。(A) is the partial schematic diagram for description of the sensor part for the rotation speed detection attached to the side of the main body of a rotation sounding device. FIG. 9B is a front view of the proximity sensor detection disk as viewed from the direction of arrow IX in FIG. (A)は、図５(A)の回動打音器の本体に付設した持上部材を説明するための部分正面図、(B)は、持上部材と、吊持部材と、台枠との関係を説明するための部分正面図。(A) is a partial front view for demonstrating the lifting member attached to the main body of the rotation sounder of FIG. 5 (A), (B) is a lifting member, a suspension member, and a frame. The fragmentary front view for demonstrating the relationship.

以下本発明の実施の形態を図面を用いて説明する。
図１は、コンクリート舗装道路（床版面）の平面図を例示し、図２は、図１におけるII−II位置断面図を示す。図１、２に例示する道路４０の内部40ａにおいて構造物として存在するコンクリート（アスファルトも同じ）構造物４６には、経年利用により道路（床版）のひび割れ、浮き、剥離、空洞等の損傷部４８が生じるので、これらを早期に発見し、回復させる必要がある。図３は上記道路（床版）４０の損傷部４８を打音により調査する為の工法に用いることのできる打音装置Sを示す。この打音装置Sは、左上に位置する手押し杆11を手で握り、矢印６５の方向に向けて台車１を押し進めることにより、台車１に連係機構４で連結してある回動打音器2の本体２０（図４、５参照）を追従させて回動させ、次々と頂点２２を衝撃的に接地させて衝撃音を発生させ、その衝撃音の音圧レベルの変化により上記損傷部４８の存在の有無を判別できるようになっている。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 illustrates a plan view of a concrete paved road (floor slab surface), and FIG. 2 is a sectional view taken along the line II-II in FIG. The concrete (asphalt) structure 46 existing as a structure in the interior 40a of the road 40 illustrated in FIGS. 1 and 2 has damaged parts such as cracks, floats, separation, and cavities of the road (floor slab) due to aging Since 48 occur, these need to be discovered and recovered early. FIG. 3 shows a sounding device S that can be used in a construction method for investigating the damaged portion 48 of the road (floor slab) 40 by sounding. The sound hitting device S is a rotary hitting sound generator 2 connected to the cart 1 by the linkage mechanism 4 by grasping the hand push rod 11 located at the upper left hand and pushing the cart 1 in the direction of the arrow 65. The main body 20 (see FIGS. 4 and 5) is rotated to follow, and the apex 22 is grounded one after another in impact to generate an impact sound. The presence or absence can be determined.

次に、上記損傷部調査用打音装置Sに備えさせた、回動打音器２にあっては、図４、５に良く表れているように、本体２０は、中心軸２５を回転中心にして回動自在に形成してある。回動打音器2の本体２０の断面の外周２１の形状は、図５（A）に表れているように多角形（例えば、図示のものは６角形にしてあるが、５〜８角形であってもよい）にしてある。回動打音器2の本体２０は回転中心２５を芯にして回動するときには外周面２１の各頂点２２の間の寸法２４が等間隔にしてあって、各頂点２２は次々と路面４１に対して、一定間隔の寸法でもって、衝撃的接地して衝撃音を発するように構成されている。
なお、各頂点22、22・・・22の間の夫々の辺23、23・・・23は、各頂点22、22・・・22の接地を妨げることがないように、図５（B）に表れているように湾曲状に凹設して、凹部23aが形成してある。 Next, in the rotary sounding device 2 provided in the damaged portion investigation sounding device S, as shown well in FIGS. Thus, it is formed to be rotatable. The shape of the outer periphery 21 of the cross section of the main body 20 of the rotary sounding device 2 is a polygon as shown in FIG. It may be) When the main body 20 of the rotary sounding device 2 rotates about the rotation center 25, the dimension 24 between the vertices 22 of the outer peripheral surface 21 is equally spaced, and the vertices 22 are in turn on the road surface 41. On the other hand, it is configured so as to make an impact sound by impacting grounding with a constant interval size.
It should be noted that each side 23, 23... 23 between the vertices 22, 22... 22 does not interfere with the grounding of each of the vertices 22, 22. A concave portion 23a is formed in a curved shape as shown in FIG.

上記回動打音器２の本体２０の外周２１の断面形状においては、角数が少ないと回転時回り難いが、路面４１に対する衝撃時の衝撃音は比較的大きくなる特長がある。しかし、角数が多いと、スムーズな回動は容易となるが、衝撃音は比較的小さくなる。
なお上記頂点２２における内角度θは、正確な衝撃音を得るためには、例えば、本体２０の断面形状が六角形の場合、図５（B）の内角θは１２０°より小さく設定する（本件においては、例えば１１０°前後の角度に狭く設定する。本件ではこのように狭く設定された角度を先鋭角ともいう）。
上記の条件によれば、各辺２３、・・・２３における湾曲状の凹設23aも大きくでき、路面上の障害物（小さな凸部）が各辺２３に当たって頂点２２の接地を妨げるような悪影響による事故も防止できる利点がある。 The cross-sectional shape of the outer periphery 21 of the main body 20 of the rotary sounding device 2 has a feature that, when the number of corners is small, it is difficult to rotate when rotating, but the impact sound at the time of impact on the road surface 41 is relatively large. However, when the number of corners is large, smooth rotation is easy, but the impact sound is relatively small.
In order to obtain an accurate impact sound, for example, when the cross-sectional shape of the main body 20 is a hexagon, the inner angle θ in FIG. 5B is set to be smaller than 120 ° (this case). For example, the angle is set to be narrow at an angle of about 110 °, and in this case, the angle set in this way is also referred to as a sharp angle).
According to the above conditions, the curved concave portion 23a on each side 23,... 23 can be enlarged, and an obstacle (small convex portion) on the road surface hits each side 23 to prevent the vertex 22 from being grounded. There is an advantage that can prevent accidents caused by.

回動打音器２の本体２０の重量は、大きな衝撃音を発生させるためには大きいことが望ましいが、取り扱いに不便をもたらすため、５kg〜８kg前後の重さがあるものが作業上好ましい。
また図５（B）に表れている、例えば６角形の例においては回動打音器2の本体２０の外周面２１の寸法（一つの辺の寸法２４の角数倍の寸法）としては、最も大きい外径となる部分（各頂点22、22・・・22の相互間の寸法（例えば６３mm）の６倍として、例えば３７８mm前後になる。また図５（B）に表れている状態において、回動打音器2の本体２０の本体２０の中心点２５から道路面４１迄の寸法は、例えば５６mm前後になるようにしてある。
なお図示の実施例においては、図５（C）に表れているように回動打音器2の本体２０の外形寸法は軸線方向の中心部22a（最も大きい外径となっている部分）は大きく、両側が比較的小径になるように各頂点22、22・・・22の形状は、図５（C）に表れているように湾曲させてある。なお、５〜８角形にあっては、上記の例を参考にして適宜変更実施すればよい。
また、上記回動打音器２の本体２０は、台車１に連結して軽快に追従させるように構成してあるから、上記よりも少し重くしても作業負担は少なく、大きな打音が出るようになり、近くで発生するノイズとの判別ができるような大きな信号が出せる利点が生まれる。 The weight of the main body 20 of the rotary sounding device 2 is preferably large in order to generate a large impact sound, but in order to cause inconvenience in handling, a weight of about 5 kg to 8 kg is preferable for work.
5B, for example, in the hexagonal example, the dimension of the outer peripheral surface 21 of the main body 20 of the rotary sounding device 2 (dimension that is a multiple of one side dimension 24) is as follows. The largest outer diameter portion (for example, around 378 mm as 6 times the dimension between the vertices 22, 22... 22 (for example, 63 mm). In the state shown in FIG. The dimension from the central point 25 of the main body 20 of the rotary sounding device 2 to the road surface 41 is, for example, about 56 mm.
In the illustrated embodiment, as shown in FIG. 5C, the outer dimension of the main body 20 of the rotary sounder 2 is the central portion 22a in the axial direction (the portion having the largest outer diameter). The vertices 22, 22... 22 are curved as shown in FIG. 5C so that both sides have a relatively small diameter. In addition, about a 5-8 octagon, what is necessary is just to change suitably with reference to said example.
Further, since the main body 20 of the rotary sounding device 2 is connected to the carriage 1 so as to follow lightly, even if it is slightly heavier than the above, the work load is small and a large sounding sound is produced. As a result, there is an advantage that a large signal that can be distinguished from nearby noise can be output.

次に台車１は、道路４０の面上を移動自在にしてある台枠１０に対して、図３、４に表れているように連係機構４を介して回動打音器2の本体２０を連結し、回動打音器2の本体２０を追従回動させる為のもので、１０は台枠を示し、10a、10bは構造部分を構成する四周の側枠、10dは補強のための補助材を示す。この部材は、鉄材を用い、両側を側枠10aに溶接するなどして丈夫に構成してある。なお、持ち運びを考えれば、周知の台車（手押し車とも称されている）のようにアルミ材、合成樹脂材を用いて軽々と（例えば５〜１０kg）構成して持ち運びができるように構成しても良い。図４に表れている台枠の大きさは、取り扱いに不便がない程度の大きさであればよい。例えば図示のように平面形状を４００mm×５００mm前後の大きさにしてあってもよい。 Next, the carriage 1 moves the main body 20 of the rotary sounding device 2 through the linkage mechanism 4 as shown in FIGS. 3 and 4 with respect to the frame 10 that is movable on the surface of the road 40. These are for connecting and rotating the main body 20 of the rotary sounding device 2. Reference numeral 10 denotes a frame, 10a and 10b are side frames of four circumferences constituting the structural part, and 10d is an auxiliary for reinforcement. Indicates the material. This member is made of a strong material by using an iron material and welding both sides to the side frame 10a. In consideration of carrying, it is configured so that it can be easily carried (for example, 5 to 10 kg) using aluminum material or synthetic resin material like a well-known cart (also called a handcart). Also good. The size of the underframe shown in FIG. 4 may be a size that does not cause inconvenience in handling. For example, as shown in the figure, the planar shape may be about 400 mm × 500 mm.

次に、１１は手押し杆を示し、図３に表れているように、夫々側枠10a、10bに対し、連結部１２において、周知の手押し車のように折り畳み自在に連結してあったり、又は、二重筒構造による抜き差し着脱自在に装着する状態にしてあったりして立ち上げた、立上杆11a、11aと、立上杆11a、11aの上方を連結する状態で横架している横杆11bを備える。さらに横杆11bには、図示のように支杆11cとハンドル11が任意の連結手段で連結してある。ハンドル11の路面からの寸法は、作業者の身長を考慮して定めてあり、例えば押し進め易いように７００〜９００mm位に設定してある。従って、上記ハンドル11を矢印６５方向に押すと、台枠１０も、回動打音器2の本体２０も同方向に向けて回動することになる。
次に１４は、台枠１０を矢印６５方向に向けて軽快に押し進めることができるように配設した車輪を示し、台枠１０の両側に複数（2個以上）の車輪を備える。
例えば台枠１０の両側に備える側枠10aに対して任意の手段でもって回転自在に装着してある。装着の手段としては各車輪における回転自在の車軸１５を側枠10aに対して固着してもよいし、側枠10aに対して車軸１５を回転自在に装着し、それに車輪を固着しても良い。 Next, reference numeral 11 denotes a hand barb, as shown in FIG. 3, which is connected to the side frames 10a and 10b so as to be foldable like a well-known wheelbarrow at the connecting part 12, or Standing up in a state where it can be detachably mounted with a double-tube structure, or standing upright, so that the uprights 11a, 11a and the upside of the uprights 11a, 11a are connected horizontally. Equipped with 杆 11b. Further, as shown in the figure, a support rod 11c and a handle 11 are connected to the horizontal rod 11b by any connecting means. The dimensions of the handle 11 from the road surface are determined in consideration of the height of the operator. For example, the dimensions of the handle 11 are set to about 700 to 900 mm so as to be easily pushed. Therefore, when the handle 11 is pushed in the direction of the arrow 65, the frame 10 and the main body 20 of the rotary sounding device 2 are rotated in the same direction.
Next, reference numeral 14 denotes a wheel arranged so that the frame 10 can be easily pushed in the direction of the arrow 65, and a plurality of (two or more) wheels are provided on both sides of the frame 10.
For example, the side frame 10a provided on both sides of the base frame 10 is rotatably mounted by any means. As a means for mounting, the rotatable axle 15 in each wheel may be fixed to the side frame 10a, or the axle 15 may be rotatably mounted to the side frame 10a, and the wheel may be fixed thereto. .

上記車輪１４の接地部分は、滑りが少ないように弾力性のある空気入りタイヤ（例えばゴムタイヤと称されるもの）で構成してある。
車輪の外径の大きさは任意（例えば２００mm前後）であるが、回動打音器2の本体２０の外径よりも大きくしてある。車輪１４の外径は大きい方が、周面が広くなり、滑りの度合いが少なく、関連回動させる回動打音器2の本体２０の回転を安定させる作用がある。 The ground contact portion of the wheel 14 is composed of a pneumatic tire (for example, a rubber tire) having elasticity so that there is little slippage.
The outer diameter of the wheel is arbitrary (for example, around 200 mm), but is larger than the outer diameter of the main body 20 of the rotary sounding device 2. The larger the outer diameter of the wheel 14, the wider the peripheral surface, the less the degree of slipping, and the effect of stabilizing the rotation of the main body 20 of the rotating sounding device 2 to be rotated.

上記台車１と、回動打音器本体２０の中心軸25との間に介設する連係機構4を介しての上記両者の連係状態は、上記台車１の前部の両側に車輪14、14を配設すると共に、その両側の車輪14、14は連係軸１６で一体回動可能に連結し、上記連係機構4は、回動打音器2の本体２０の回動に伴い回動打音器2の本体２０の中心軸25が、台車１に対し、上下方向56に揺動することを許容するようにしてある。例えば上記車輪14、14の連係軸１６に対して図５（A）に表れているように、ベアリング状の掛合部材５１を被挿通状態で回動自在に備えさせ、掛合部材５１に連係機構４の先端部２９を図５（A）に表れているように任意の手段で連結することにより揺動自在に装着してある。 The linkage state between the carriage 1 and the central shaft 25 of the rotary sounding instrument main body 20 via the linkage mechanism 4 is such that the wheels 14 and 14 are located on both sides of the front portion of the carriage 1. The wheels 14, 14 on both sides thereof are connected to each other by a linkage shaft 16 so as to be integrally rotatable. The central shaft 25 of the main body 20 of the container 2 is allowed to swing in the vertical direction 56 with respect to the carriage 1. For example, as shown in FIG. 5A with respect to the linkage shaft 16 of the wheels 14, 14, a bearing-like engagement member 51 is rotatably provided in the inserted state, and the engagement member 51 is connected to the linkage mechanism 4. As shown in FIG. 5 (A), the distal end portion 29 is attached by any means so as to be swingable.

図４の右側に表れている前側の車輪14、14の各車軸15、15は、両側の車輪14、14が一体的に回動するように両者は連結してある。即ち、車輪14、14の車軸15、15は、一体化するために一本の連係軸１６で連結し、１体状に構成してある。そして上記車輪14、14の連係軸１６は、上記台枠１０に対して回転自在に備えさせてある。 The axles 15 and 15 of the front wheels 14 and 14 appearing on the right side of FIG. 4 are connected so that the wheels 14 and 14 on both sides rotate together. That is, the axles 15 and 15 of the wheels 14 and 14 are connected to each other by a single linkage shaft 16 so as to be integrated into one body. The linkage shaft 16 of the wheels 14, 14 is provided so as to be rotatable with respect to the frame 10.

次に上記連係軸１６と上記回動打音器本体２０の中心軸25との間には、図４、図５、図８によく表れている関連伝達機構５８を介在させ、上記台車１の前部の両側の車輪14、14の外周面が路面４１に接する状態で進行方向へ向けて回動している状態においては、上記回動打音器本体２０の中心軸25が、上記車輪14、14の外周面の動きに一定の関連を維持した状態で駆動され、さらに、上記回動打音器本体２０の外周21の各頂点22が路面４１に接する状態で進行方向へ向けて回動するように構成してある。
このように回動打音器本体２０の外周21の各頂点22の動きを、台車１の前部（図４において右側）の両側の車輪14、14の外周面の動きに関連させておけば、即ち、具体的には、上記回動打音器本体２０の外周21の各頂点22が滑動することなく等間隔24で路面41に対して衝撃的接地するように、上記回動打音器本体２０の中心軸25と、上記台車１の前部の両側にある車輪14、14との間の連係軸１６とをベルト５７で連携し、上記回動打音器本体２０の外周21の各頂点22を駆動可能に構成してあると、上記回動打音器本体２０の外周21の各頂点22は路面４１の上を滑ることも無く、軽快に回転し、大きな音を立てて衝撃的接地を繰り返す。 Next, between the linkage shaft 16 and the central shaft 25 of the rotary sounder main body 20, an associated transmission mechanism 58, which is often shown in FIGS. In a state where the outer peripheral surfaces of the front wheels 14, 14 are in contact with the road surface 41 and are rotating in the traveling direction, the central shaft 25 of the rotating sounding instrument body 20 is connected to the wheels 14. , 14 while maintaining a certain relation to the movement of the outer peripheral surface, and further rotating in the direction of travel while each vertex 22 of the outer periphery 21 of the rotary sounding instrument body 20 is in contact with the road surface 41 It is comprised so that it may do.
In this way, if the movement of each vertex 22 of the outer periphery 21 of the rotary sounder main body 20 is related to the movement of the outer peripheral surfaces of the wheels 14 and 14 on both sides of the front portion (right side in FIG. 4) of the carriage 1. In other words, specifically, the rotating sounding device is configured so that each vertex 22 of the outer periphery 21 of the rotating sounding device body 20 is grounded to the road surface 41 at equal intervals 24 without sliding. The central shaft 25 of the main body 20 and the linkage shaft 16 between the wheels 14 and 14 on both sides of the front portion of the carriage 1 are linked by a belt 57, and each of the outer peripheries 21 of the rotary sounder main body 20. If the apex 22 is configured to be driven, each apex 22 on the outer periphery 21 of the rotary sounding instrument main body 20 does not slide on the road surface 41, rotates lightly, makes a loud noise, and is shocking. Repeat the grounding.

上記車輪１４には、図示のように周面に弾力性を備えている凹凸部を備える周知のタイヤを備えさせると良い。このように車輪１４の外周面が路面４１の上をスリップしないようにすると、上記回動打音器本体２０の外周21の頂点22が路面４１の上で滑る状態に遭遇しても、関連伝達機構５８で関連回動自在にしてある車輪１４の外周面はスリップし難いので、車輪１４が駆動源となって本体２０の外周２１を強制的に回動させて、上記回動打音器本体２０の外周21の頂点22が路面４１の上で滑ることを防止し、回動打音器本体２０が誤作動（誤測定）することを防止する働き（効果）が生じる。 As shown in the drawing, the wheel 14 may be provided with a well-known tire having a concavo-convex portion having elasticity on the peripheral surface. Thus, if the outer peripheral surface of the wheel 14 is prevented from slipping on the road surface 41, even if the vertex 22 of the outer peripheral surface 21 of the rotary sounding instrument main body 20 slips on the road surface 41, the related transmission is performed. Since the outer peripheral surface of the wheel 14 that is freely rotated by the mechanism 58 is difficult to slip, the outer periphery 21 of the main body 20 is forcibly rotated by using the wheel 14 as a driving source, so that the rotary sounding instrument main body. Thus, a function (effect) for preventing the apex 22 of the outer periphery 21 of the 20 from sliding on the road surface 41 and preventing the rotary sounder main body 20 from malfunctioning (erroneous measurement) occurs.

次に上記連係機構４について説明する。連係機構４は、回動打音器2の本体２０が台車１の進行に伴って台車１と同方向６５に回動して、台車１に追従するように連係させる機構で、図３、４，５、８によく表れている。
図において、２８は回動打音器2の本体２０を引き連れ可能な強度を有する連係杆で、例えば、鉄板、板ばね等の部材で構成される。先端部（止着部）２９は、上記台枠と一体的に前後動する部分に装着する。例えば連係軸１６に対して、掛合部材５１を回動自在に装着して、その掛合部材５１の連結片51aに、ボルト等、任意の連結具を用いて着脱自在に連結してある。なお着脱自在の他の連結手段は、任意の周知の手段を用いればよい。 Next, the linkage mechanism 4 will be described. The linkage mechanism 4 is a mechanism in which the main body 20 of the rotary sounding device 2 rotates in the same direction 65 as the carriage 1 as the carriage 1 travels, and is linked so as to follow the carriage 1. , 5 and 8 appear well.
In the figure, reference numeral 28 denotes a linkage rod having a strength capable of pulling the main body 20 of the rotary sounder 2, and is composed of, for example, a member such as an iron plate or a leaf spring. The front end portion (fastening portion) 29 is attached to a portion that moves back and forth integrally with the frame. For example, the engaging member 51 is rotatably attached to the linkage shaft 16 and is detachably connected to the connecting piece 51a of the engaging member 51 using an arbitrary connecting tool such as a bolt. Any other well-known means may be used as the other detachable connecting means.

次に他方の自由端部３２には、本体２０を回動自在に連結する。手段としては任意であるが、例えば図示のように、硬質材を用いて、二叉状に形成された連繋部材３３（一つの横持ち部材33aと、2つの縦引き部材33bとが二叉状に一体材で構成されている連繋部材）を用い、2つの縦引き部材33bの間に図5（C）に表れているように回動打音器2の本体２０を納め、本体２０の回転軸２５を回転自在に2つの縦引き部材33bで支持する。一方、一つの横持ち部材33aの中央部からの突片３０は、図5に表れているように上記後方の自由端部３２の端部材にボルト等、任意の連結具を用いて着脱取り外しを自在に連結する。
従って、上記構成によれば、台車１の持ち運びに当たって、台車１から回動打音器２を分離して夫々手軽な態様にして運搬することができる利点がある。 Next, the main body 20 is rotatably connected to the other free end portion 32. Any means may be used. For example, as shown in the figure, a connecting member 33 formed of a hard material in a bifurcated shape (one horizontal holding member 33a and two vertical pulling members 33b are bifurcated. The main body 20 of the rotary sounding device 2 is placed between the two longitudinal pulling members 33b as shown in FIG. 5C, and the main body 20 is rotated. The shaft 25 is rotatably supported by two vertical pulling members 33b. On the other hand, the protruding piece 30 from the central portion of one horizontal holding member 33a can be attached / detached using an arbitrary connecting tool such as a bolt to the end member of the rear free end portion 32 as shown in FIG. Connect freely.
Therefore, according to the said structure, when carrying the trolley | bogie 1, there exists an advantage which can isolate | separate the rotation sound generator 2 from the trolley | bogie 1, and can carry it in an easy aspect, respectively.

なお、連係杆２８の先端部２９は、図５（A）に表れているように台枠１０の前側の側枠10b近くに棒状の補助材10dを横架状に配置し、その補助材10dに連係杆２８の先端部２９を上下揺動自在に装着してもよい。その場合、連係杆28の位置は、一点鎖線28aで示すように、連係軸１６に近づけて配設するとベルト５７の張りを調節するのに都合が良い。 As shown in FIG. 5 (A), the distal end portion 29 of the linkage rod 28 has a rod-like auxiliary material 10d arranged in a horizontal shape near the front side frame 10b of the base frame 10, and the auxiliary material 10d. Alternatively, the distal end portion 29 of the linkage rod 28 may be mounted so as to be swingable up and down. In this case, it is convenient to adjust the tension of the belt 57 if the position of the linkage rod 28 is arranged close to the linkage shaft 16 as indicated by a one-dot chain line 28a.

次に、上記車軸１５と上記回動打音器本体２０の中心軸25とを上記車輪１４の外周面が路面に接する状態で進行方向へ向けて回動している状態においては、上記回動打音器本体２０の中心軸25が、上記車輪１４の外周面の動きに一定の関連を維持した状態で、同期的に回動し、上記回動打音器本体２０の外周21の各頂点22が、路面４１に対して滑動することなく回動して、等間隔24で路面41に対して衝撃的接地するように、ベルト５７で連携する点の具体的構成を図４、図５、図６等の図を用いて説明する。 Next, in the state where the axle 15 and the central shaft 25 of the rotary sounder main body 20 are rotated in the traveling direction with the outer peripheral surface of the wheel 14 in contact with the road surface, the rotation is performed. The central axis 25 of the sound generator main body 20 rotates synchronously in a state in which a constant relation is maintained with the movement of the outer peripheral surface of the wheel 14, and each vertex of the outer periphery 21 of the rotary sound generator main body 20. 4, 5, and 5, the specific configuration of the point that the belt 57 cooperates with the belt 57 so that the belt 22 rotates without sliding with respect to the road surface 41 and is shockedly grounded with respect to the road surface 41 at equal intervals 24. This will be described with reference to FIG.

上記構成は、関連伝達機構５８として図３、図４、図５、図６、図８等に例示してある。図において５２、５５は、プーリー（スプロケットとも言われる）で、夫々図示のように連係軸１６と、回動軸２５に１体化してある軸５４に固着してある。
５７は伝導ベルトを示す。伝導用のベルト５７としては、連係軸１６と、回動軸２５に１体化してある軸５４とを同期的に連動させる周知のものであればよい。例えば、平ベルト，Vベルトであっても良く、プーリー５２、５５が歯車のように外周に歯をもったプーリー（スプロケット、例えば、外周に対して図６に表れているように多数の噛合溝52aが備えられている）のであれば、それに巻きつけて対応伝動する歯付きベルト（図６に表れているようにベルト５７の内側に多数の噛合溝57aが備えられていて、スプロケット５５，５２の外周の噛合溝52aに対して噛合をして回転方向にスリップしない構成にしたもの）であれば良い。或いは、図示のプーリー５２、５５がギヤであれば、チェーンであっても良く、両者間に滑りのない構成であれば良い。 The above configuration is exemplified as the related transmission mechanism 58 in FIGS. 3, 4, 5, 6, 8, and the like. In the figure, reference numerals 52 and 55 denote pulleys (also referred to as sprockets), which are fixed to a linkage shaft 16 and a shaft 54 formed as a single body on the rotary shaft 25 as shown in the figure.
Reference numeral 57 denotes a conductive belt. The conductive belt 57 may be any known belt that synchronizes the linkage shaft 16 and the shaft 54 formed as one body with the rotation shaft 25 in a synchronized manner. For example, a flat belt or a V-belt may be used, and the pulleys 52 and 55 may be pulleys having teeth on the outer circumference such as gears (sprockets, for example, a large number of meshing grooves as shown in FIG. 6 with respect to the outer circumference. 52a), a toothed belt wound around the belt (FIG. 6) is provided with a large number of meshing grooves 57a on the inner side of the belt 57, and sprockets 55, 52 are provided. And the engagement groove 52a on the outer periphery of the outer periphery may be configured so as not to slip in the rotation direction. Alternatively, if the illustrated pulleys 52 and 55 are gears, a chain may be used as long as there is no slip between them.

上記構成によれば、手押し杆１１を握って台車１を前方へ（矢印６５方向へ）押し進めると車輪14、14は前進方向へ回動する。一方、回動打音器本体２０も、連係軸１６に支えられている掛合部材５１に連なる連係機構４に引かれて連繋部材３３が前進するので、回動打音器本体２０の外周21における各頂点22も前進方向へ連動して回動し、前進する。 According to the above configuration, the wheels 14 and 14 are rotated in the forward direction when the hand barb 11 is grasped and the cart 1 is pushed forward (in the direction of the arrow 65). On the other hand, the rotating sounder main body 20 is also pulled by the linkage mechanism 4 connected to the engaging member 51 supported by the linkage shaft 16 and the connecting member 33 moves forward. Each vertex 22 also rotates in conjunction with the forward direction and moves forward.

さらにこの場合、車輪14、14、連係軸１６、プーリー５２、５５、ベルト５７、軸５４、２５、回動打音器本体２０も連動して回動する。
従って、車輪14、14の外周の接地面と、回動打音器本体２０の外周21のおける各頂点22も共に路面４１に接地する状態で前進方向へ連動して、相互間においても、実質的に遅速することなく、また、路面４１に対しても、共に、スリップすることなく同期的に回動する。 Further, in this case, the wheels 14 and 14, the linkage shaft 16, the pulleys 52 and 55, the belt 57, the shafts 54 and 25, and the rotating sounder main body 20 are also rotated in conjunction with each other.
Accordingly, the ground contact surfaces on the outer circumferences of the wheels 14 and 14 and the vertices 22 on the outer periphery 21 of the rotary sounder main body 20 are both linked to the road surface 41 and interlocked in the forward direction. Therefore, both of them rotate synchronously with respect to the road surface 41 without slipping.

次に上記連繋部材３３に付設してある持上部材66は、図１０によく表れているように連繋部材３３の上面から夫々立ち上げてある二本の棒状の立上材66a、66aと、立上材66a、66aの頭部相互間を連結する棒状の横架材66bで構成され、これらの連繋部材３３と、立上材66aと、横架材66bとは溶接手段など任意の手段で接続一体化させてある。
上記持上部材66は、台車１を大きく移動させたい場合（例えば、台車１を路面上にて遠くに移動させたい場合、台車１をトラックに積んで遠くへ運びたい場合等）においては、台車１に対して、持上部材66を介して上記重量のある回動打音器本体２０を吊り上げ（持ち上げ）、回動打音器本体２０を路面から離反することにより、移動の邪魔にならず、台車１は車輪14、14で支えて安易に移動をすることができる効果がある。 Next, the lifting member 66 attached to the connecting member 33 includes two rod-like rising members 66a and 66a respectively raised from the upper surface of the connecting member 33 as shown in FIG. Consists of rod-like horizontal members 66b that connect the heads of the uprights 66a, 66a, and these connecting members 33, the uprights 66a, and the horizontal members 66b can be joined by any means such as welding means. Connection is integrated.
The lifting member 66 is used when the carriage 1 is to be moved largely (for example, when the carriage 1 is moved far on the road surface, when the carriage 1 is loaded on a truck and carried away). 1, the heavy rotating sounder main body 20 is lifted (lifted) via the lifting member 66, and the rotational sounder main body 20 is separated from the road surface so that the movement is not disturbed. The cart 1 can be easily moved by being supported by the wheels 14 and 14.

例えば、上記立上材66a、66aと、横架材66bで囲まれる空間に、太い棒状材（角材）の吊持部材67を差し込んで、上記連繋部材３３を回動打音器本体２０と共に持ち上げ、吊持部材67の両端部67a、67aを図１０（B）に表れているように、台枠１０の上面に乗せて上記回動打音器本体２０を安定した釣り上げ状態にすることのできる効果がある。
斯かる状態においては、重量のある回動打音器本体２０は、空中に浮き上がるので車輪14、14で支えられている台枠１０は手軽に押し動かすことのできる効果がある。
また、移動の時に、回動打音器本体２０が路面４１から離れているので路面を傷つけない利点もある。 For example, a thick rod-shaped member (square member) suspension member 67 is inserted into a space surrounded by the upright members 66a and 66a and the horizontal member 66b, and the connecting member 33 is lifted together with the rotary sounder main body 20. As shown in FIG. 10B, both end portions 67a and 67a of the suspension member 67 can be put on the upper surface of the underframe 10 so that the rotary sounder main body 20 can be in a stable fishing state. effective.
In such a state, since the heavy rotating sounding instrument main body 20 floats in the air, the frame 10 supported by the wheels 14 and 14 can be easily pushed and moved.
Moreover, since the rotary sounder main body 20 is separated from the road surface 41 during the movement, there is an advantage that the road surface is not damaged.

次に、回動打音器本体２０の回転数を検出する為の回転検出装置７０を説明する。この検出装置７０は図８、図９に表れているように、本体２０に付設するもので、本体２０の回転数に関わるデータから、本体２０の外周面が路面４１の上を直接回動して接した状態での調査したラインの距離を正確に知ることができる。例えば、車輪14が高所に乗り上げた場合でも、本体２０の外周面が路面４１の上を直接回動して移動した距離を知ることができる利点がある。
回転検出装置７０の構成としては、図示の構成にこだわることなく、本体２０の外周面が接地した距離を知ることができる周知の装置を用いればよい。例えば、電磁誘導を利用した高周波発振型、磁石を用いた磁気型、静電容量の変化を利用した静電容量型等の近接センサ７０を用いると良い。 Next, the rotation detection device 70 for detecting the rotation speed of the rotary sounding instrument main body 20 will be described. As shown in FIGS. 8 and 9, the detection device 70 is attached to the main body 20, and the outer peripheral surface of the main body 20 rotates directly on the road surface 41 based on data relating to the rotation speed of the main body 20. It is possible to accurately know the distance of the investigated line in the state of contact. For example, even when the wheel 14 rides on a high place, there is an advantage that the distance that the outer peripheral surface of the main body 20 moves by directly rotating on the road surface 41 can be obtained.
As a configuration of the rotation detection device 70, a known device that can know the distance that the outer peripheral surface of the main body 20 is grounded may be used without being particular about the configuration shown in the drawing. For example, a proximity sensor 70 such as a high frequency oscillation type using electromagnetic induction, a magnetic type using a magnet, or a capacitance type using a change in capacitance may be used.

例えば、図９に表れている近接センサ７０について説明する。７１は、回動打音器本体２０の回転軸25、54の軸端25aに対して本体２０と一体回動自在に装着した磁性金属製の近接センサ検出用円盤を示す。この円盤７１には、本体２０の外周の角数（図９に表れている本体２０の外周の角数は６）に相当する数だけのカウント用の透孔（磁気反応を示さない透孔）７２が、夫々本体２０の外周の多角形の各頂点２２に対応する位置に、かつ、同一円周上に備えられている。
７３は、透孔数検出用のセンサー部材で、上記透孔７２が回動する軌跡に対向する位置に固定され、上記カウント用の透孔７２の通過する数が計れるようにしてある。連繋部材33bの１部から延出された部材によって支持されている。７５はセンサー部材７３から送出されるカウント信号を図示外の受信機に送るためのケーブルの存在を示す。 For example, the proximity sensor 70 appearing in FIG. 9 will be described. Reference numeral 71 denotes a proximity sensor detection disk made of magnetic metal that is attached to the rotary shafts 25 and 54 of the rotary sounder main body 20 so as to be rotatable together with the main body 20. In this disk 71, the number of through holes for counting corresponding to the number of corners on the outer circumference of the main body 20 (the number of corners on the outer circumference of the main body 20 shown in FIG. 9) is equal to the number of through holes (through holes not showing a magnetic reaction). 72 are provided at positions corresponding to the respective apexes 22 of the polygon on the outer periphery of the main body 20 on the same circumference.
Reference numeral 73 denotes a sensor member for detecting the number of through holes, which is fixed at a position facing a trajectory in which the through holes 72 are rotated, so that the number of passing through the counting through holes 72 can be measured. It is supported by a member extending from a part of the connecting member 33b. Reference numeral 75 denotes the presence of a cable for sending a count signal sent from the sensor member 73 to a receiver (not shown).

上記構成の打音装置Sを用いての道路内部の損傷部の打音調査工法についての実施例を説明する。
現場としては図１、２に表れているような道路（例えば高速道路）４０があり、道路（床版）４０の内部には、外部から見ることのできない損傷部（例えば空洞）４８が１又は２カ所以上あることが予想（想像）される場合、損傷部４８の存在の有無について打音調査が必要になる。
なお図中、４１は道路の表面、４２は上り線42aと、下り線42bの中間に設けられる中央線、４３は走行車線と追越車線とを区分する車線境界線、４６は構造物（コンクリート又はアスファルト材で構成されている）、４７は必要に応じて介在されている鉄筋、金網を示す。 An embodiment of a sounding investigation method for a damaged portion inside a road using the sounding device S having the above configuration will be described.
As a site, there is a road (for example, a highway) 40 as shown in FIGS. 1 and 2, and inside the road (floor plate) 40 there is one damaged portion (for example, a cavity) 48 that cannot be seen from the outside. When it is expected (imagined) that there are two or more places, it is necessary to investigate the sound of the presence or absence of the damaged portion 48.
In the figure, 41 is the surface of the road, 42 is a center line provided between the up line 42a and the down line 42b, 43 is a lane boundary line that separates the driving lane and the overtaking lane, and 46 is a structure (concrete 47 is composed of an asphalt material), 47 indicates a reinforcing bar or a wire mesh interposed as required.

現場においては、管理者の指示に従って調査範囲を確定する。例えば上り線42aの幅が４ｍあるものとすれば、両側から各１ｍのところに調査指示線４４を引く。こうすることにより走行車線と追越車線に1本宛の調査指示線４４が引かれたことになる。
次に図３に表れているように調査用の上記の打音装置Sを道路面上に配置する。なお運搬の都合上、台車１と、回動打音器２が分離してあった場合は、連係機構４を介して連結すると良い。
上記のようにして準備が整った後は、図３に表れている打音装置Sを、基点５０から、調査指示線４４に添わせ状態で矢印６５方向に押し進めると、台車１は路面上を移動する状態で前進する。このように台車１が路面上４１を移動することにより、台車１に連結した状態の回動打音器２の本体２０は調査指示線４４に添う状態で回動しながら台車１に追従する。
なお、本体２０は図５（A）の最も安定した状態（下側に位置する一つの辺２３が路面４１に対向し、前後２つの頂点22、22が接地する状態）から、台車１の進行に伴い、連係杆２８を介しての矢印６５方向に向けての引っ張り力が軸心２５に及ぶと上記２つの頂点22、22の内、前側に位置する頂点22を支点にして、軸心２５は浮上する状態で前に移動し、前側に位置していた頂点22（支点）を超えると、自重も加わり、軸心２５は急激な早さで前に移動する。このとき、上記の「前後の２つの頂点22、22」よりも前側に位置していた頂点22が路面に向けて衝撃的に接地し、この頂点22eが発音部となって衝撃音を発する。 At the site, the survey area is determined according to the instructions of the manager. For example, if the width of the up line 42a is 4 m, the survey instruction line 44 is drawn at a distance of 1 m from each side. By doing so, one survey instruction line 44 is drawn on the traveling lane and the overtaking lane.
Next, as shown in FIG. 3, the above-described sound-striking device S for investigation is arranged on the road surface. In addition, for the convenience of transportation, when the cart 1 and the rotating sounding device 2 are separated, it is preferable to connect them via the linkage mechanism 4.
After the preparation is completed as described above, when the sound hitting device S shown in FIG. 3 is pushed from the base point 50 in the direction of the arrow 65 in a state of being attached to the investigation instruction line 44, the carriage 1 is moved on the road surface. Move forward while moving. As the carriage 1 moves on the road surface 41 in this way, the main body 20 of the rotary sounding device 2 connected to the carriage 1 follows the carriage 1 while rotating in a state of following the investigation instruction line 44.
The main body 20 is shown in FIG. 5A in a most stable state (a state in which one side 23 located on the lower side faces the road surface 41 and the two front and rear vertices 22 and 22 are in contact with the ground). Accordingly, when a pulling force in the direction of the arrow 65 via the linkage rod 28 reaches the axis 25, the axis 25 is set with the apex 22 located on the front side of the two apexes 22, 22 as a fulcrum. Moves forward in a floating state, and when it exceeds the vertex 22 (fulcrum) located on the front side, its own weight is also added, and the axis 25 moves forward at a rapid speed. At this time, the vertex 22 located in front of the above-mentioned “front and rear two vertices 22 and 22” is shockedly grounded toward the road surface, and this vertex 22e serves as a sound generating portion and emits an impact sound.

この追従状態では、回動打音器2の本体２０は、断面の外周形状が多角形に形成され、回動どきには外周の各頂点が等間隔で次々と路面に対して衝撃的接地して衝撃音を発するように中心部を回転中心にして回動自在に形成してあるので、道路の内部における損傷部４８（例えば空洞）の有無に対応した音圧レベル（図７参照）の衝撃音を次々と発生する。
このように衝撃音の音圧レベルが、道路の内部において損傷部（例えば空洞４８）が有る場合と、道路の内部に損傷部が無い場合（中実の場合40a）とでは、耳で聞き分けできるように相違するので、台車を押し進めている作業員は、道路の内部における損傷部（例えば空洞）の有無を、上記衝撃音の音圧レベルの変化から判別探知することができる。 In this follow-up state, the main body 20 of the rotary sounding device 2 has a polygonal outer peripheral shape in cross section, and each vertex of the outer periphery is impacted to the road surface one after another at equal intervals. In order to emit an impact sound, the center part is formed so as to be rotatable about the center of rotation, so that an impact of a sound pressure level (see FIG. 7) corresponding to the presence or absence of a damaged part 48 (for example, a cavity) inside the road Generate sounds one after another.
Thus, the sound pressure level of the impact sound can be discerned by ear when there is a damaged part (for example, the cavity 48) inside the road and when there is no damaged part inside the road (solid 40a). Thus, the worker pushing the carriage can discriminate and detect the presence or absence of a damaged portion (for example, a cavity) inside the road from the change in the sound pressure level of the impact sound.

次に上記の作業において衝撃音の音圧レベルの変化を判別探知した場合には、道路地図（例えば図１のような図面）に、基点５０から変化があった地点４８までの距離を書き込む。乃至は、変化があった地点４８に対し、後日知ることができるようにチョーク等、任意の手段で印を付ける。その後は引き続き、走行車線と追越車線に各1本宛引かれた調査指示線４４に添った状態で同様の作業を繰り返す。なお、1本の調査指示線４４の長さは任意であるが、高速道路では勿論のこと、県道などの一般道での車線を長時間通行止めにすることできないので、1本の調査指示線４４の長さは、例えば５０ｍ〜１００ｍ位に止める場合が多い。 Next, when the change in the sound pressure level of the impact sound is discriminated and detected in the above work, the distance from the base point 50 to the point 48 where the change has occurred is written in the road map (for example, the drawing as shown in FIG. 1). Or, the point 48 where the change has occurred is marked by any means such as chalk so that it can be known later. Thereafter, the same operation is repeated with the survey instruction line 44 addressed to each of the traveling lane and the overtaking lane. Although the length of one survey instruction line 44 is arbitrary, it is not possible to stop a lane on a general road such as a prefectural road as a matter of course on an expressway. The length of is often stopped at, for example, about 50 m to 100 m.

次に上記台車１においては、図８に表れているように、台車１に連係してある回動打音器２の本体２０の近くに対して、回動打音器2の本体２０における外周の各頂点２２が路面４１に対して衝撃的接地をして発する衝撃音を収録する為の衝撃音収録用マイクロフォン６を装備しておくとよい。衝撃音を収録する為のマイクロフォン６が装備されていると、回動打音器2の本体２０における外周の各頂点２２が一定の寸法間隔24、24・・・24で路面４１に接することにより発する衝撃的接地音と、その一定の寸法間隔24、24・・・24で発する衝撃的接地音と同期して、道路内部の損傷部４８の有無によって変化する衝撃音の音圧レベルの変化状況を、同時に、収録することができる。このような音圧レベルを、任意周知のレコーダー6eに収録しておくことにより、後日、周知の音響解析装置、例えばソノグラフを用いて道路内部40aの損傷部４８に関する打音調査状況を知ることができる。 Next, in the cart 1, as shown in FIG. 8, the outer periphery of the main body 20 of the rotary sounder 2 with respect to the vicinity of the main body 20 of the rotary sounder 2 linked to the cart 1. It is preferable to equip the microphone 6 for recording an impact sound for recording the impact sound generated by each of the vertices 22 making an impact ground contact with the road surface 41. When the microphone 6 for recording the impact sound is equipped, each apex 22 on the outer periphery of the main body 20 of the rotary sounding device 2 comes into contact with the road surface 41 at a constant dimensional interval 24, 24. Changes in the sound pressure level of the impact sound that changes depending on the presence or absence of the damaged portion 48 inside the road, in synchronization with the impact ground sound that is emitted and the impact ground sound that is emitted at a constant dimension interval 24, 24. Can be recorded at the same time. By recording such a sound pressure level in any well-known recorder 6e, it is possible to know the sounding investigation status regarding the damaged portion 48 in the road interior 40a at a later date by using a well-known acoustic analysis device such as a sonograph. it can.

上記のようにして収録された衝撃的接地音・音圧レベル等は図７(A)（B）に表れているように可視化できる。図７(A)は、回動打音器２の本体２０における外周の各頂点22、22・・・22が矢印６５方向に回動することにより一定の寸法間隔24、24・・・24で路面４１に接し、発する衝撃的接地音の音圧レベル36a、36bの変化を表す図である。符号37、37・・・37は上記「一定の寸法間隔24、24・・・24」に対応するものであり、この数量を積算すれば、回動打音器２の移動距離が自明となる。また、音圧レベル36a、36bの高低の変化は、道路内部の損傷部４８の有無の変化を表すものであり、36aは損傷部４８がある場合の音圧レベル、36bは損傷部４８がない場合の音圧レベルを夫々表す。
図７(B)は、回動打音器の本体２０における外周の各頂点が一定の寸法間隔で路面に接することにより発する衝撃的接地音をスペクトログラムで表す図である。周知のように横軸が時間を、縦軸が周波数を表しており、色の濃い部分（図では密度が高い部分38a）が損傷部４８のある場合を表しており、色の薄い部分（図では密度が粗い部分38b）が損傷部４８のない場合を表している。
従って、図７(A)（B）を比較しながら検討すると、図１の基点５０からどのくらいの距離のところに、損傷部４８があったか、否かが判別できることになる。 The shocking grounding sound and sound pressure level recorded as described above can be visualized as shown in FIGS. 7 (A) and 7 (B). FIG. 7A shows a case where the vertices 22, 22... 22 on the outer periphery of the main body 20 of the rotating sounder 2 are rotated in the direction of the arrow 65, with a constant dimensional interval 24, 24. It is a figure showing the change of the sound pressure levels 36a and 36b of the shocking grounding sound which touches the road surface 41 and emits. Reference numerals 37, 37... 37 correspond to the above-mentioned "constant dimensional intervals 24, 24... 24", and if this quantity is integrated, the moving distance of the rotary sounder 2 becomes obvious. . Further, the change in the sound pressure levels 36a and 36b represents the change in the presence or absence of the damaged portion 48 inside the road, 36a is the sound pressure level when the damaged portion 48 is present, and 36b has no damaged portion 48. The sound pressure level in each case is represented.
FIG. 7 (B) is a spectrogram representing the impact grounding sound that is generated when the outer peripheral vertices of the main body 20 of the rotary sounding instrument come into contact with the road surface at a constant dimensional interval. As is well known, the horizontal axis represents time, the vertical axis represents frequency, and the dark portion (the high density portion 38a in the figure) represents the damaged portion 48, and the light portion (see FIG. FIG. 9 shows a case where a portion 38 b) having a low density is free from the damaged portion 48.
Therefore, when comparing FIGS. 7A and 7B, it is possible to determine how far the damaged portion 48 is from the base point 50 in FIG.

Ｓ・・・打音装置、
１・・・台車、
２・・・回動打音器、
４・・・連係機構、
６・・・衝撃音収録用マイクロホン、
１０・・・台枠、
10a、10ｂ・・・側枠、
10ｄ・・・補助材（補助枠）、
１１・・・手押し杆、
11a・・・立上杆、
11b・・・横杆、
１２・・・連結部、
１４・・・車輪、
１５・・・車軸、
２０・・・本体、
２１・・・外周面（５〜８角）、
２２・・・頂点、
２３・・・辺、
２４・・・辺の寸法（頂点間の寸法）、
２５・・・回動軸（中心軸）、
２８・・・連係杆、
２９・・・元部（止着部、
３０・・・突片、
３２・・・自由端部、
３３・・・連繋部材、
３３a・・・横持ち、
３３b・・・縦引き、
３４・・・軸受部材、
４０・・・道路（床版）、
４１・・・表面、
４２・・・中央線、
４３・・・車線境界線、
４４・・・調査指示線、
４６・・・構造物、
４７・・・鉄筋、
４８・・・（空洞）損傷部、
５０・・・基点、
５１・・・掛合部材、
５８・・・関連伝達機構、
６５・・・矢印。 S ... Sounding device,
1 ... dolly,
2 ... Rotating hammer
4 ... linkage mechanism,
6 ... Microphone for recording impact sound,
10 ... underframe,
10a, 10b ... side frame,
10d ... auxiliary material (auxiliary frame),
11 ... hand barb,
11a ...
11b ... Yokohama
12 ... connection part,
14 ... wheels,
15 ... Axle,
20 ... body,
21 ... outer peripheral surface (5 to 8 corners),
22 ... vertex,
23 ... side,
24 ... side dimensions (dimensions between vertices),
25... Rotation axis (center axis),
28 ... Linkage,
29 ... original part (fastening part,
30 ... projection piece,
32 ... free end,
33 ... connecting member,
33a ...
33b ... longitudinal pulling,
34 ... Bearing member,
40 ... road (floor),
41 ... surface,
42 ... Chuo Line,
43 ... Lane boundary,
44 ... Survey instruction line,
46 ... structure,
47 ... rebar,
48 ... (cavity) damaged part,
50 ... base point,
51 .. engaging member,
58 ... related transmission mechanism,
65 ... Arrow.

Claims

A main body of a rotary sounding device formed so as to be rotatable about a central axis, and the outer periphery of the cross section of the main body is a polygon, and when the main body is rotated on the road surface, the outer periphery Each apex in the outer circumference is provided with a main body of a rotating sounding device projecting so that each apex of
Furthermore, the vehicle is provided with a carriage supported by wheels so as to be movable on the road surface, and the main body of the rotary sounding device is rotated in a state in contact with the road surface in the same direction as the carriage as the carriage advances. In order to follow the carriage, the carriage is linked via a linkage mechanism,
The linkage state of the cart and the central axis of the rotary sounder main body via the linkage mechanism is such that the central axis of the main body of the rotary sounder is moved by the rotation of the main body of the rotary sounder. On the other hand, it is supported to allow swinging in the vertical direction,
Furthermore, the axle of the wheel is configured so as to be able to rotate integrally with the wheel, and the center axis that is integrally rotatable with the axle and the rotating sounder main body is such that the outer peripheral surface of the wheel is a road surface. In the state where it is rotating toward the direction of travel while in contact with the center, the central axis of the rotating sounding instrument main body rotates while maintaining a certain relationship with the movement of the outer peripheral surface of the wheel, The inside of the road is characterized in that each vertex of the outer periphery of the rotating sounder main body is linked with a belt so as to make an impact contact with the road surface at equal intervals without sliding on the road surface. A sounding device for investigating damaged parts.

A main body of a rotary sounding device formed so as to be rotatable about a central axis, and the outer periphery of the cross section of the main body is a polygon, and when the main body is rotated on the road surface, the outer periphery Each apex in the outer circumference is provided with a main body of a rotating sounding device projecting so that each apex of
In addition, a cart supported by a plurality of wheels so as to be movable on the road surface is provided, and the main body of the rotary sound generator is rotated in a state in contact with the road surface in the same direction as the cart as the cart progresses. It is linked to the carriage through a linkage mechanism so as to move and follow the carriage,
The linkage state of the cart and the central axis of the rotary sounder main body via the linkage mechanism is such that the central axis of the main body of the rotary sounder is moved by the rotation of the main body of the rotary sounder. On the other hand, it is supported to allow swinging in the vertical direction,
Further, on both sides of the front part of the carriage, the above wheels are arranged, and the wheels on both sides are connected to each other so as to be integrally rotatable by a linkage shaft, and the linkage shaft rotates with respect to the carriage. The link shaft and the central shaft that can rotate integrally with the rotary sounding instrument main body are freely provided in the traveling direction with the outer peripheral surfaces of the wheels on both sides of the front portion of the carriage contacting the road surface. In the state of rotating toward the center, the central axis of the rotary sounder main body is driven in a state in which a constant relation is maintained with the movement of the outer peripheral surface of the wheel, Coupling between the central axis of the rotary sounder main body and the wheels on both sides of the front part of the carriage so that the outer peripheral vertices do not slide and make a shocking contact with the road surface at equal intervals A sounding device for investigating a damaged part inside a road, characterized in that the shaft is linked with a belt.

A main body of a rotary sounding device formed so as to be rotatable about a central axis, and the outer periphery of the cross section of the main body is a polygon, and when the main body is rotated on the road surface, the outer periphery Each apex in the outer circumference is provided with a main body of a rotating sounding device projecting so that each apex of
In addition, a cart supported by a plurality of wheels so as to be movable on the road surface is provided, and the main body of the rotary sound generator is rotated in a state in contact with the road surface in the same direction as the cart as the cart progresses. It is linked to the carriage through a linkage mechanism so as to move and follow the carriage,
The linkage state between the carriage and the central axis of the rotary sounding instrument main body is such that the wheels are disposed on both sides of the front part of the carriage, and the The wheels are connected by a linkage shaft so that they can rotate together.
The linkage mechanism includes a linkage shaft for the wheel so as to allow the central axis of the main body of the rotary sounder to swing up and down with respect to the carriage as the main body of the rotary sounder rotates. It is mounted so that it can swing with respect to
Further, the linkage shaft is provided so as to be rotatable with respect to the cart, and the linkage shaft and the central shaft that can rotate integrally with the rotary sounder main body are located on both sides of the front portion of the cart. In a state where the outer peripheral surface of the wheel is rotating in the traveling direction with the road surface in contact with the road surface, the central axis of the rotating sounding instrument main body maintains a certain relation to the movement of the outer peripheral surface of the wheel. The central axis of the rotary sounder main body and the carriage so that each vertex of the outer periphery of the rotary sounder main body is driven in a state and is shockedly grounded to the road surface at equal intervals without sliding A hitting device for investigating a damaged part inside a road, characterized in that it is linked with a link shaft between wheels on both sides of the front part of the road with a belt.

4. A sensor of a rotational speed detection device is attached to the central axis of the rotary sounder main body so as to detect the rotational speed of the rotary sounder main body. A sounding device for investigating a damaged portion inside a road.

5. A hitting sound for investigating a damaged portion inside a road according to claim 1, wherein the connecting member is provided with a lifting member for lifting the rotating sounder main body from the road surface and separating it. apparatus.