JPH03160342A - Apparatus for striking iron lid of manhole - Google Patents
Apparatus for striking iron lid of manholeInfo
- Publication number
- JPH03160342A JPH03160342A JP1299832A JP29983289A JPH03160342A JP H03160342 A JPH03160342 A JP H03160342A JP 1299832 A JP1299832 A JP 1299832A JP 29983289 A JP29983289 A JP 29983289A JP H03160342 A JPH03160342 A JP H03160342A
- Authority
- JP
- Japan
- Prior art keywords
- hammer
- spring
- main body
- handle
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 31
- 238000009863 impact test Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は通信ケーブル等を敷設しているマンホールの鉄
蓋の劣化状態を、鉄蓋をハンマで打撃することにより診
断するマンホール鉄蕃打撃装置に関する．
（従来の技術）
従来、通信ケーブル等を敷設してあるマンホールの鉄蓋
は長期間の設置により疲労して破損すると、この鉄蓋の
上を通る人や車に被害を与えることがある．そこで、マ
ンホールの鉄蓋は定期的に打撃を行って疲労試験をする
必要がある．マンホールの鉄蓋を打撃する従来の技術と
しては第６図及び第７図に示す２種の方法が知られてい
る．
（１）手打ちハンマによる打撃（第６図）これはマンホ
ールの鉄蓋６０を取り出してクッション材６１の上に置
き、ハンマチップ６２が設けられた手打ちハンマ６３に
より人力で鉄Ｍ６０を打撃するものである．
（２）旋回ハンマによる打撃（第７図）旋回ハンマ７０
は、打撃用穴７ｌが設けられたベース板７２と、先端に
ハンマチップ７３が設けられたアーム７４と、アーム７
４を打撃穴方向に付勢する捻じりコイルばね７５と、把
手７７とを備えるものである．そして、打撃試験を行う
時は，ベース板７２をクッション材６１の上に置かれた
鉄Ｍ６０の上に置き、人が手でアーム７４をばね７５に
抗して回転させ、手を放してハンマチップ７３で鉄蓋６
０を打撃する．
（発明が解決しようとする課題）
ところが、従来の手打ちハンマによる打撃では、手打ち
作業のために鉄蓋６０に与える打撃力が一定にならず、
従って、鉄蓋自体の固有振動数が一定にならないため、
鉄蓋劣化診断の判定に人による個人差が生じるという問
題がある．また、旋回ハンマによる打撃では打撃力は一
定となるが、鉄蓋６０の種別（大型と小型の２種類ある
）毎に打撃力を変化させるためには、捻じりコイルばね
７５を取り換える必要があり、このばね７５の取換作業
は現場では容易にできないという問題がある．
本発明は前記従来のマンホール鉄蓋の打撃試験における
課題を解消し、誰が使用しても簡単に、しかも常に一定
の打撃力を得ることができ、また、鉄蓋の種別に応じて
も容易に打撃力を変更することが可能なマンホール＃益
打撃装置を提供することを目的としている．
〔発明の構成〕
（課題を解決するための手段）
前記目的を達成する本発明のマンホール鉄蓋打撃装置は
、筒状の装置本体内のマンホール蓋当接側に設けれ、ば
ねにより付勢されて常時は本体内に収容される本体より
突出可能な従動ハンマと、前記装置本体内に前記従動ハ
ンマに隣接して移動可能に収容され、その軸の中央部に
ばね止具、非従勤ハンマ側軸端部に係止突起を有する主
動ハンマと、前記主動ハンマのばね止具を取り囲む状態
で前記装置本体内に収容され、本体内を移動可能な肩体
と、前記装置本木の側面長手方向に穿設された案内溝を
通して前記簡木の外壁面に接続し、前記ｆｒＪ＃を本体
内で移動させるハンドルと、前記筒体内の主勤ハンマ軸
の回りに設けられ、前記ばね止具を介して主動ハンマを
前記従勤ハンマ側に付勢するばねと、前記ｌ！！ｉ体が
非従勤ハンマ側に移動させられた時に、このｆ！ｌと共
に移動する主動ハンマの係止突起を係止する係止機構と
、前記案内溝の従勤ハンマ測に設けられ、前記主動ハン
マが前記係止機構に係止された後に前記ハンドルをロッ
クする、位置の異なる少なくとも２つのロック清とを備
え，前記ハンドルを移動させて主動ハンマを係止機構に
係止させ、ハンドルをロック溝にロックさせた状態で係
止Ｒ構による主動ハンマの係止を解除することにより主
動ハンマを従動ハンマに衝突させ、従動ハンマによりマ
ンホール蓋打撃試験を行うようにしたことを特徴として
いる．（作用）
本発明のマンホール鉄蓋打撃装置では、打撃装置本体に
設けられたハンドルが打撃装置後＠側に移動されること
によって、打撃装置本体内にあり、このハンドルにばね
を介して係合する主動ハンマは装置後端側に移動してロ
ックされる．この後にハンドルが装置前端側が移動され
て所定の打撃力設定位置に係止されると、主動ハンマ前
述のばねによって打撃装置前端側に所定の力で付勢され
る．この状態で主動ハンマのロックが外されると、主動
ハンマは装Ｗ．前端側に急速に８勤して従動ハンマに衝
突し、衝突された従動ハンマが鉄賽を打撃する．
（実施例）
以下添付図面を用いて本発明の実施例を詳細に説明する
．
第１図は本発明のマンホール鉄蓋打撃装置の一実施例の
構成を示す断面図であり、第２図は第１図のマンホール
鉄蓋打撃装置を矢印Ａ方向から見た開面図である．
第ｌ図において、３０は筒状のマンホール鉄亜打撃装置
本体を示しており、この装置本体３０の先＠部にはハン
マチッグ収容部４および略王冠状のＭｉＩゴム１が設け
られている．そして、ハンマチップ収容部４の凹部４ａ
にはドーム状のマンホール鉄蓋打撃用のハンマチッグ２
が収容されており、このハンマチップ２にはハンマチッ
プ収容部４の底部４ｂを貫通する従動ハンマ軸３が突設
されている．従動ハンマ軸３の自由端側にはばね受７を
介してハンマチップ９が設けられており、ばわ受７とハ
ンマチッグ収容部４の底部４ｂとの間には介装された戻
し用ばね６により、ハンマチップ２はハンマチップ収容
部４の凹部４ａｌｌｌに付勢されている．
また、従動ハンマ軸３の周囲の装置本体３０の内径は拡
げられており、この拡げられた内径部には可動ばね受８
が収容されている．そして、可動ばね受８とハンマチッ
プ収容部４の底部４ｂとの間には戻し用ばね５が挿入さ
れており、通常、可動ばね受８は装置本体３０の内径拡
大部の末端にある段部３ｌに押し付けられている，
更に、通常の内径を有する装置本体３０内には、装置本
体３０内を移動可能なｌ！ｊ＃１２が設けられており、
この筒体１２の測面にはハンドル１５が突設されている
．ハンドルｌ５は装置本体３０に設けられた案内１１４
を通って装置本体３０の外に突出しており、その自由端
にはノプ１５ａが設けられている．そして、この問体１
２は装置本体３０の外部からのノブ１５ａの操作により
、案内溝ｌ４の長さの範囲で装置本体３０内を移動でき
るようになっている．更に、案内溝１４の先端側には、
ハンドル１５を係止するための第２図に示すような形状
の係止清３２．３３が設けられている．
ｌ３は前述の筒体１２の両端に設けられた孔を貫通する
主動ハンマ軸であり、この主動ハンマ軸ｌ３の従動ハン
マ軸３側には７ランジｌ１を介してハンマチップ１０が
設けられており、他端には係止円板１８が設けられてい
る．また、主動ハンマ軸ｌ３のほぼ中央部には固定ばね
受１６が設けられており、この固定ばね受け１６と係止
円板ｌ８ｌｐ！ｌの筒体ｌ２の端部内壁との間にはばね
１７が設けられている．この固定ばね受けｌ６の設置位
置は、例えば、第１図に示すように、ハンドルｌ５が係
止消３３の位置にある時に、簡体１２の先端開の端部内
壁位置になるようにすれば良い，１９は装置本体３０に
後端部近鋳に設けられたスリット３５を通って装置本体
３０の内部に突出する略し字状の係止レバーであり、こ
の係止レバ−４９は装置本体３０のＩｌ１面に突設され
たブラゲット２３の回転軸２４に回動自在に輔支されて
おり、通常はばね２０により係止レバー１９の先端部が
装置本体３０の内部に突出する方向に付勢されている．
３４は装置本体３０の後端部の開口を塞ぐ蓋である．
なお、第２図の２２は以上のように構成された実施例の
マンホール鉄蓋打撃装置を用いて打撃試験を行う字のマ
ンホール２２の位置を示すものである．次に以上のよう
に楕成された実施例の動作を第３図から第５図を用いて
説明する．（１）主動ハンマ軸のロック動作（第３図）
第１図の位置にあるノプ１５ａが把持されてハンドル１
５が案内溝１４の後端側まで移動させられると、筒体ｌ
２もこれに伴って後端側に移動すると共に、この筒体１
２の先端側の端部に固定ばね受１６が押されるので、主
動ハンマ軸１３も後＠側に移動する．そして、この上動
ハンマ軸１３の移動により主動ハンマ軸１３の端部に設
けられた係止円板１８が係止レバー１９に係止される．
（２）主動ハンマ軸の付勢動作（第４図）第３図のよう
に主動ハンマ軸１３が係止レバー１９にロックされた後
に、ハンドル１５が案内溝１４の先端側に移動させられ
ると、簡体１２の内部にあるばね１７が固定ばね受１６
と筒体１２の端部に押されて圧縮される．そして、ハン
ドル１５が所定位置で装置本体３０の円周方向に回転さ
せられ、ハンドル１５が係止溝３３にロックされると、
主動ハンマ軸１３は係止円板１８が係止レバー１９にロ
ックされた状態で、圧縮されたばね１７により先＠部方
向に付勢され、打撃力が蓄積される．なお、ハンドル１
５がロックされる係止溝の位置を変更することにより、
蓄積される打撃力を容易に変更することができる．
〈３〉主動ハンマ軸の打撃動作（第５図）第４図の状態
゛で係止レバー１９の自由端がばね２０に抗して押され
ると、係止円板１８と係止しレバー１９とのロックが外
れ、主動ハンマ軸１３はばね１７の付勢力により先端側
に急速に移動し、主動ハンマ軸１３の先端のハンマチッ
プ１０が従動ハンマ軸３のハンマチップ９に衝突してこ
れを打撃すると共に、フランジ１１が可動ばね受８を打
撃する．この打撃により、従動ハンマ軸３が先端測に移
動してＭｆｌｒゴム１が接触するマンホール鉄蓋２２を
打撃する．
以上が第１図に示した実施例の動作であるが、この実施
例の装置は、マンホール＃ｃ蓋２２に与える打撃力の減
衰を極力抑えるために、緩衝ゴム１を装置本体３０の先
端部に設けて、装置本体３０の金属部分が直接ａｆｉ２
２に接触しないようにしている．
また、前述の実施例のマンホールＩ！）ｃ．蓋打撃装置
では、従動ハンマ軸３のハンマチップ２がマンホール鉄
蓋２２を２度打ちするのを防止するために、従動ハンマ
軸３の戻し用ばね６および主動ハンマ軸■３の戻し用ば
ね５が設けられており、各々のばね５，６により残存す
る打撃力を吸収させる．なお、主動ハンマ軸１３のスト
ロークはＬであり、第４図に示すように主動ハンマ軸１
３の戻し用ばね５の圧ｍ ｉ Ｌ １ とし、従動ハン
マ軸３のストロークＬ２とすると、各々次の関係が必要
である．Ｌｌ ≧Ｌ２ 、Ｌ＞ＬＩ Ｌ＞Ｌ．
２〔発明の効果〕
以上説明したように、本発明のマンホール鉄蓋打撃装置
によれば、誰が使用しても簡単に、しかも常に一定の打
撃力を得ることができ、また、鉄蓋の種別に応じても容
易に打撃力を変更することが可能になり、効率良くマン
ホール鉄蓋の打撃試験が行えるという効果がある．[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention diagnoses the deterioration state of the iron cover of a manhole in which communication cables, etc. are laid, by hitting the iron cover with a hammer. Concerning manhole iron barb striking device. (Prior Art) Conventionally, the iron covers of manholes on which communication cables, etc. are laid, become fatigued and damaged due to long-term installation, which can cause damage to people and vehicles passing over the iron covers. Therefore, it is necessary to perform fatigue tests on manhole iron covers by periodically subjecting them to blows. As conventional techniques for hitting manhole iron covers, there are two known methods shown in Figures 6 and 7. (1) Hitting with a hand hammer (Fig. 6) This involves taking out the iron cover 60 of the manhole, placing it on a cushion material 61, and hitting the iron M60 manually with a hand hammer 63 equipped with a hammer tip 62. be. (2) Impact with a swing hammer (Fig. 7) Swing hammer 70
consists of a base plate 72 provided with a striking hole 7l, an arm 74 provided with a hammer tip 73 at its tip, and an arm 7.
4 in the direction of the striking hole, and a handle 77. When performing the impact test, a person places the base plate 72 on M60 iron placed on the cushion material 61, rotates the arm 74 by hand against the spring 75, releases the hand, and hammers it. Iron lid 6 with chip 73
Hit 0. (Problems to be Solved by the Invention) However, in the conventional manual hammering, the impact force applied to the iron lid 60 is not constant due to manual hammering work.
Therefore, since the natural frequency of the iron lid itself is not constant,
There is a problem in that there are individual differences in the judgment of iron lid deterioration diagnosis. Further, when striking with a swing hammer, the striking force is constant, but in order to change the striking force for each type of iron lid 60 (there are two types, large and small), it is necessary to replace the torsion coil spring 75. However, there is a problem in that this spring 75 cannot be easily replaced on site. The present invention solves the problems in the conventional impact test of manhole iron covers, allows anyone to use it easily and always obtain a constant impact force, and can also be easily applied depending on the type of iron cover. The purpose is to provide a manhole striking device that can change the striking force. [Structure of the Invention] (Means for Solving the Problems) The manhole cover striking device of the present invention that achieves the above object is provided on the manhole cover abutting side in a cylindrical device body, and is biased by a spring. a driven hammer that is normally housed in the main body and can protrude from the main body, and a non-driven hammer that is movably housed in the device main body adjacent to the driven hammer and has a spring stopper in the center of its shaft. a driving hammer having a locking protrusion at a side shaft end; a shoulder body that is housed in the apparatus main body and movable within the main body surrounding the spring stopper of the driving hammer; and a shoulder body that is movable within the apparatus main body; a handle that connects to the outer wall surface of the simple wood through a guide groove drilled in the direction and moves the frJ# within the main body; a spring that biases the driving hammer toward the driven hammer through the l! ! When body i is moved to the non-working hammer side, this f! a locking mechanism for locking a locking protrusion of the driving hammer that moves with the driving hammer; and a locking mechanism for locking the locking protrusion of the driving hammer that moves with the driving hammer, and for locking the handle after the driving hammer is locked by the locking mechanism. , comprising at least two locks in different positions, moving the handle to lock the driving hammer in the locking mechanism, and locking the driving hammer by the locking R mechanism with the handle locked in the lock groove; The main feature of this system is that by releasing the , the driving hammer collides with the driven hammer, and the driven hammer performs a manhole cover impact test. (Function) In the manhole iron cover striking device of the present invention, the handle provided on the striking device main body is moved to the rear @ side of the striking device, so that the handle is located inside the striking device main body and engaged with the handle via a spring. The active hammer moves to the rear end of the device and locks. After this, when the front end of the device is moved and the handle is locked at a predetermined impact force setting position, the driving hammer is urged toward the front end of the impact device with a predetermined force by the aforementioned spring. If the drive hammer is unlocked in this state, the drive hammer will be attached to the W. It rapidly moves toward the front end side and collides with the driven hammer, and the collided driven hammer hits the iron die. (Example) Examples of the present invention will be described in detail below using the accompanying drawings. FIG. 1 is a cross-sectional view showing the structure of an embodiment of the manhole cover striking device of the present invention, and FIG. 2 is an open view of the manhole cover striking device of FIG. 1 viewed from the direction of arrow A. ．． In FIG. 1, reference numeral 30 indicates a cylindrical manhole iron striking device body, and the tip of this device body 30 is provided with a hammer holder 4 and a roughly crown-shaped MiI rubber 1. Then, the recess 4a of the hammer chip accommodating portion 4
There is a hammer 2 for hitting the dome-shaped manhole iron cover.
is accommodated in the hammer tip 2, and a driven hammer shaft 3 protrudingly extends from the bottom 4b of the hammer tip accommodating portion 4. A hammer tip 9 is provided on the free end side of the driven hammer shaft 3 via a spring receiver 7, and a return spring 6 is interposed between the spring receiver 7 and the bottom portion 4b of the hammer tip accommodating portion 4. As a result, the hammer tip 2 is urged against the recess 4all of the hammer tip accommodating portion 4. Further, the inner diameter of the device main body 30 around the driven hammer shaft 3 is expanded, and a movable spring receiver 8 is provided in this expanded inner diameter.
is accommodated. A return spring 5 is inserted between the movable spring receiver 8 and the bottom portion 4b of the hammer chip accommodating portion 4, and the movable spring receiver 8 is normally attached to a stepped portion at the end of the enlarged inner diameter portion of the device body 30. Furthermore, inside the apparatus main body 30 having a normal inner diameter, there is a l! which can be moved within the apparatus main body 30. j#12 is provided,
A handle 15 is provided protruding from the surface of this cylinder 12. The handle l5 is a guide 114 provided on the device main body 30.
The knob 15a is provided at the free end of the knob 15a. And this question 1
2 can be moved within the device body 30 within the length of the guide groove l4 by operating a knob 15a from outside the device body 30. Furthermore, on the tip side of the guide groove 14,
Locking tabs 32 and 33 having a shape as shown in FIG. 2 are provided for locking the handle 15. 13 is a driving hammer shaft passing through holes provided at both ends of the aforementioned cylinder 12, and a hammer chip 10 is provided on the driven hammer shaft 3 side of this driving hammer shaft 13 via a 7 lange 11. , a locking disk 18 is provided at the other end. Further, a fixed spring receiver 16 is provided approximately at the center of the driving hammer shaft l3, and this fixed spring receiver 16 and a locking disc l8lp! A spring 17 is provided between the inner wall of the end of the cylindrical body l2. The installation position of this fixed spring receiver 16 may be, for example, as shown in FIG. 1, when the handle 15 is in the locking/disengaging position 33, the position is at the inner wall of the open end of the simplified body 12. , 19 is an abbreviated locking lever that protrudes into the inside of the device main body 30 through a slit 35 provided near the rear end of the device main body 30; It is rotatably supported by a rotating shaft 24 of a braget 23 protruding from the Il1 surface, and is normally biased by a spring 20 in a direction in which the tip of the locking lever 19 projects into the inside of the device main body 30. ing.
34 is a lid that closes the opening at the rear end of the device main body 30. Note that 22 in FIG. 2 indicates the position of the manhole 22 in which the impact test is performed using the manhole iron cover impact device of the embodiment constructed as described above. Next, the operation of the elliptical embodiment as described above will be explained using FIGS. 3 to 5. (1) Locking operation of the driving hammer shaft (Fig. 3)
When the knob 15a in the position shown in FIG. 1 is grasped, the handle 1
5 is moved to the rear end side of the guide groove 14, the cylinder l
2 also moves toward the rear end side, and this cylindrical body 1
Since the fixed spring receiver 16 is pushed by the tip end of the hammer shaft 2, the driving hammer shaft 13 also moves to the rear @ side. By this movement of the upper driving hammer shaft 13, a locking disk 18 provided at the end of the main driving hammer shaft 13 is locked to a locking lever 19.
(2) Biasing operation of the driving hammer shaft (Fig. 4) After the driving hammer shaft 13 is locked to the locking lever 19 as shown in Fig. 3, when the handle 15 is moved to the tip side of the guide groove 14. , the spring 17 inside the simplified body 12 is fixed to the fixed spring receiver 16.
and is pressed by the end of the cylinder 12 and compressed. Then, when the handle 15 is rotated in the circumferential direction of the device main body 30 at a predetermined position and the handle 15 is locked in the locking groove 33,
With the locking disk 18 locked to the locking lever 19, the driving hammer shaft 13 is biased toward the front end by the compressed spring 17, and a striking force is accumulated. In addition, handle 1
By changing the position of the locking groove where 5 is locked,
The accumulated striking force can be easily changed. <3> Hitting operation of the driving hammer shaft (Fig. 5) When the free end of the locking lever 19 is pushed against the spring 20 in the state shown in Fig. 4, it locks with the locking disc 18 and the lever 19 The lock is released, and the driving hammer shaft 13 rapidly moves toward the tip side due to the biasing force of the spring 17, and the hammer tip 10 at the tip of the driving hammer shaft 13 collides with the hammer tip 9 of the driven hammer shaft 3, causing At the same time as the impact, the flange 11 also impacts the movable spring receiver 8. Due to this impact, the driven hammer shaft 3 moves toward the tip and hits the manhole iron cover 22 with which the Mflr rubber 1 comes into contact. The above is the operation of the embodiment shown in FIG. so that the metal part of the device body 30 directly connects to the afi2
I try not to come into contact with 2. Moreover, the manhole I of the above-mentioned embodiment! ) c. In the lid striking device, in order to prevent the hammer tip 2 of the driven hammer shaft 3 from hitting the manhole iron cover 22 twice, a return spring 6 of the driven hammer shaft 3 and a return spring 5 of the driving hammer shaft 3 are used. are provided, and each spring 5, 6 absorbs the remaining impact force. The stroke of the driving hammer shaft 13 is L, and as shown in FIG.
Assuming that the pressure m i L 1 of the return spring 5 of No. 3 and the stroke L2 of the driven hammer shaft 3 are respectively the following relationships. Ll ≧L2, L>LI L>L.
2 [Effects of the Invention] As explained above, according to the manhole cover striking device of the present invention, anyone can easily obtain a constant striking force regardless of the type of the iron cover. This makes it possible to easily change the impact force depending on the situation, and has the effect of efficiently performing impact tests on manhole covers.
第１図は本発明のマンホール鉄蓋打撃装置の一実施例の
構成を示す断面図、第２図は第１図のマンホール鉄蓋打
撃装置を矢印Ａ側から見た圓面図、第３図から第５図は
第１図のマンホール鉄蓋打撃装置の動作を示す動作説明
図、第６図は従来の手打ちハンマによるマンホール鉄蓋
の打撃を示す説明図、第７図は従来の旋回ハンマによる
マンホール鉄蓋の打撃を示す説明図である．
１・・・Ｍｆｌｌゴム
２・・・ハンマチップ
３・・・従動ハンマ
４−・・・固定ばね受け
５・・・戻し用ばね
６・・・戻し用ばね
７・・・可動ばね受け
８・・・可動ばね受け
９・・・ハンマチップ
１０・・・ハンマチップ
ｌ１・・・７ランジ
１２・・・筒体
１３・・・主動ハンマ軸
１４・・・案内溝
１５・・・ハンドル
１５ａ・・・ノブ
１６・・・固定ばね受け
１７・・・ばね
１８・・・係止円板
１９・・・係止レバー
２０・・・ばね
２１・・・把手
２２・・・マンホール菩
３
Ｏ
・・装置本体
３２，
３３
・・ハンドルの係止溝FIG. 1 is a cross-sectional view showing the structure of an embodiment of the manhole cover striking device of the present invention, FIG. 2 is a round view of the manhole cover striking device of FIG. 1 viewed from the arrow A side, and FIG. 3 Fig. 5 is an explanatory diagram showing the operation of the manhole cover striking device shown in Fig. 1, Fig. 6 is an explanatory diagram showing the striking of a manhole cover by a conventional manual hammer, and Fig. 7 is an explanatory diagram showing the operation of the manhole cover striking device in Fig. 1. This is an explanatory diagram showing the impact of a manhole cover. 1... Mflll rubber 2... Hammer chip 3... Driven hammer 4 -... Fixed spring receiver 5... Return spring 6... Return spring 7... Movable spring receiver 8... - Movable spring receiver 9... Hammer tip 10... Hammer tip l1... 7 langes 12... Cylindrical body 13... Active hammer shaft 14... Guide groove 15... Handle 15a... Knob 16... Fixed spring receiver 17... Spring 18... Locking disc 19... Locking lever 20... Spring 21... Handle 22... Manhole Bodhisattva 3 O... Equipment body 32, 33...Handle locking groove
Claims (1)
ねにより付勢されて常時は本体内に収容される本体より
突出可能な従動ハンマと、 前記装置本体内に前記従動ハンマに隣接して移動可能に
収容され、その軸の中央部にばね止具、非従動ハンマ側
軸端部に係止突起を有する手動ハンマと、 前記手動ハンマのばね止具を取り囲む状態で前記装置本
体内に収容され、本体内を移動可能な筒体と、 前記装置本体の側面長手方向に穿設された案内溝を通し
て前記筒体の外壁面に接続し、前記筒体を本体内で移動
させるハンドルと、 前記筒体内の主動ハンマ軸の回りに設けられ、前記ばね
止具を介して主動ハンマを前記従動ハンマ側に付勢する
ばねと、 前記筒体が非従動ハンマ側に移動させられた時に、この
筒体と共に移動する主動ハンマの係止突起を係止する係
止機構と、 前記案内溝の従動ハンマ側に設けられ、前記主動ハンマ
が前記係止機構に係止された後に前記ハンドルをロック
する、位置の異なる少なくとも２つのロック溝とを備え
、 前記ハンドルを移動させて主動ハンマを係止機構に係止
させ、ハンドルをロック溝にロックさせた状態で係止機
構による主動ハンマの係止を解除することにより主動ハ
ンマを従動ハンマに衝突させ、従動ハンマによりマンホ
ール蓋打撃試験を行うようにしたマンホール鉄蓋打撃装
置。[Scope of Claims] A driven hammer that is provided on the manhole cover abutting side in a cylindrical device main body and that is biased by a spring and can protrude from the main body that is normally housed within the main body; a manual hammer that is movably housed adjacent to the driven hammer and has a spring stopper in the center of its shaft and a locking protrusion at the end of the shaft on the non-driven hammer side; and a state that surrounds the spring stopper of the manual hammer. a cylindrical body housed in the apparatus main body and movable within the main body; and a cylindrical body connected to the outer wall surface of the cylindrical body through a guide groove bored in the longitudinal direction of the side surface of the apparatus main body, and the cylindrical body is moved within the main body. a spring provided around the driving hammer shaft in the cylinder body and urging the driving hammer toward the driven hammer side via the spring stopper; and a spring that causes the cylinder body to move toward the non-driven hammer side. a locking mechanism that locks a locking protrusion of the driving hammer that moves together with the cylindrical body when the cylinder body is moved; and a locking mechanism that is provided on the driven hammer side of the guide groove, and the driving hammer is locked with the locking mechanism. and at least two lock grooves at different positions that lock the handle later, the handle is moved to lock the driving hammer in the locking mechanism, and the handle is locked in the lock groove by the locking mechanism. A manhole iron cover striking device in which a manhole cover striking test is performed using the driven hammer by releasing the locking of the driving hammer to cause the driving hammer to collide with the driven hammer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299832A JPH03160342A (en) | 1989-11-20 | 1989-11-20 | Apparatus for striking iron lid of manhole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1299832A JPH03160342A (en) | 1989-11-20 | 1989-11-20 | Apparatus for striking iron lid of manhole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03160342A true JPH03160342A (en) | 1991-07-10 |
Family
ID=17877464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1299832A Pending JPH03160342A (en) | 1989-11-20 | 1989-11-20 | Apparatus for striking iron lid of manhole |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03160342A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013228347A (en) * | 2012-04-24 | 2013-11-07 | Kun-Ta Lee | Impact apparatus and impact assembly including the same |
| JP2014070453A (en) * | 2012-10-01 | 2014-04-21 | Nippon Chutetsukan Kk | Method for diagnosing deterioration in iron cover |
| CN106522276A (en) * | 2016-11-04 | 2017-03-22 | 成都启立辰智科技有限公司 | Municipal manhole cover |
| KR20210132287A (en) * | 2020-04-24 | 2021-11-04 | 한국철도기술연구원 | Impact load striking device, structure stability evaluation system having the same and structure stability evaluation method |
-
1989
- 1989-11-20 JP JP1299832A patent/JPH03160342A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013228347A (en) * | 2012-04-24 | 2013-11-07 | Kun-Ta Lee | Impact apparatus and impact assembly including the same |
| JP2014070453A (en) * | 2012-10-01 | 2014-04-21 | Nippon Chutetsukan Kk | Method for diagnosing deterioration in iron cover |
| CN106522276A (en) * | 2016-11-04 | 2017-03-22 | 成都启立辰智科技有限公司 | Municipal manhole cover |
| KR20210132287A (en) * | 2020-04-24 | 2021-11-04 | 한국철도기술연구원 | Impact load striking device, structure stability evaluation system having the same and structure stability evaluation method |
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