JPS6239190Y2 - - Google Patents
Info
- Publication number
- JPS6239190Y2 JPS6239190Y2 JP1981005267U JP526781U JPS6239190Y2 JP S6239190 Y2 JPS6239190 Y2 JP S6239190Y2 JP 1981005267 U JP1981005267 U JP 1981005267U JP 526781 U JP526781 U JP 526781U JP S6239190 Y2 JPS6239190 Y2 JP S6239190Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal
- seal member
- annular
- swivel shaft
- pressure fluid
- 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.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims description 18
- 239000004519 grease Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 7
- 239000004576 sand Substances 0.000 description 4
- 230000008439 repair process Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
Description
【考案の詳細な説明】
本考案はスイベル装置、特に杭打機等の地下構
造物施工機械においてロツド等の回転掘削手段の
上端部に接続し下端部に設けられた圧送用流体吐
出用のノズルに流体を供給するスイベル装置に関
するものである。[Detailed description of the invention] The present invention is a swivel device, particularly a nozzle for discharging fluid for pressure feeding that is connected to the upper end of a rotary excavation means such as a rod and provided at the lower end of an underground structure construction machine such as a pile driver. This invention relates to a swivel device for supplying fluid to a swivel device.
この種スイベル装置としては固定体と回転体と
の間にＯリングを設けてシールしたものが知られ
ているが、長期間の使用によりＯリングが摩耗し
てシール不能となつてしまうので耐久性が悪い。 A known type of swivel device has an O-ring between the fixed body and the rotating body for sealing, but the O-ring wears out over long periods of use and becomes unable to seal, so it has poor durability.
そこで、実開昭50−141402号公報に示す如く、
固定体と回転体との間にグリス溜を設け、Ｏリン
グを潤滑して耐久性を向上するようにしたものが
提案されているが、この構造であると固定体が直
接固定側に固設してあるから回転体が揺動変位す
るとＯリング自体が押しつぶされてしまうために
早期に摩耗し耐久性をあまり向上できないとの不
具合を有する。 Therefore, as shown in Utility Model Application Publication No. 141402/1983,
It has been proposed that a grease reservoir be provided between the stationary body and the rotating body to lubricate the O-ring and improve durability, but with this structure, the stationary body is directly fixed to the stationary side. Since the O-ring itself is crushed when the rotating body is oscillated, it wears out early and the durability cannot be improved much.
本考案は上記の事情に鑑みなされたものであ
り、その目的は固定体と回転体との間のシール部
材に潤滑液を供給できると共に、回転体が固定側
に対して変位できるようにして回転体が揺動変位
した時にシール部材が押しつぶされないようにす
ることで耐久性を向上したスイベル装置を提供す
ることである。 The present invention was developed in view of the above circumstances, and its purpose is to supply lubricant to the sealing member between the stationary body and the rotating body, and also to allow the rotating body to rotate with respect to the stationary side. To provide a swivel device with improved durability by preventing a seal member from being crushed when a body is oscillated.
次に図面を参照して本考案の一実施例を説明す
る。 Next, an embodiment of the present invention will be described with reference to the drawings.
第１図は杭打機の全体正面図であり、本体Ａは
下部走行体１０と上部旋回体１１とにより構成さ
れ、上部旋回体１１にはリーダ１２が取付けてあ
り、該リーダ１２のガイド１３に沿つて杭打機構
１４が上下摺動自在に装着され、この杭打機構１
４は図示しないウインチに巻掛けられたワイヤ１
５で上下動される。 FIG. 1 is an overall front view of the pile driver. The main body A is composed of a lower traveling body 10 and an upper rotating body 11. A leader 12 is attached to the upper rotating body 11, and a guide 13 of the leader 12 is shown in FIG. A pile driving mechanism 14 is mounted so as to be slidable up and down along the pile driving mechanism 1.
4 is a wire 1 wound around a winch (not shown)
5 moves it up and down.
該杭打機構１４は第２図に示す如く構成してあ
る。 The pile driving mechanism 14 is constructed as shown in FIG.
つまり、駆動装置１６のギヤケース１７をガイ
ド１３に沿つて上下摺動自在に設け、このギヤケ
ース１７を貫通した駆動パイプ１８にギヤ１９を
設け、このギヤ１９に噛合したギヤ２０をギヤケ
ース１７に設けたモータ５に変速機５′を介して
連結している。 That is, the gear case 17 of the drive device 16 is provided to be able to slide vertically along the guide 13, the gear 19 is provided on the drive pipe 18 passing through this gear case 17, and the gear 20 that meshes with this gear 19 is provided on the gear case 17. It is connected to the motor 5 via a transmission 5'.
該ギヤケース１７にはシリンダ２１を介して重
錘２２を備えた基板２３が吊設され、この基板２
３及び重錘２２はガイド１３に上下摺動自在に嵌
合取付けてあり、その下部には環体２４を介して
キヤツプ２５が吊設固定され、前記駆動パイプ１
８の下部はキヤツプ２５の孔２６内に臨みかつカ
ツプリング２７を介してロツド２が吊下連結して
あり、その上端にはスイベル装置２８を介して第
１ホース２９が接続連通してある。 A board 23 equipped with a weight 22 is suspended from the gear case 17 via a cylinder 21.
3 and the weight 22 are fitted and attached to the guide 13 so as to be able to freely slide up and down, and a cap 25 is suspended and fixed to the lower part of the guide 13 via a ring body 24.
The lower part of the rod 8 faces into the hole 26 of the cap 25 and is suspended and connected to the rod 2 via a coupling 27, and the first hose 29 is connected and communicated to the upper end of the rod 2 via a swivel device 28.
前記環体２４には土砂排出口３０が形成され、
この土砂排出口３０はシリンダ３１′で回動され
る蓋３１で開閉されると共に、環体２４には第２
ホース３３が接続連通しかつ前記土砂排出口３０
と対向した孔３４が形成してある。 A sand discharge port 30 is formed in the ring body 24,
This earth and sand discharge port 30 is opened and closed by a lid 31 rotated by a cylinder 31', and a second
A hose 33 is connected and communicated with the earth and sand discharge port 30.
A hole 34 is formed opposite to the hole 34 .
前記キヤツプ２５には筒状体となる杭１が着脱
自在に装着可能となつている。 A cylindrical stake 1 can be detachably attached to the cap 25.
そして、ギヤケース１７、重錘２２、キヤツプ
２５はそれぞれワイヤ１５１，１５２，１５２で
上下動される。 The gear case 17, weight 22, and cap 25 are moved up and down by wires 151 , 152 , and 152, respectively.
前記杭１はコンクリート製、鋼管等の中空パイ
プ状となり、その杭１の内部には前記ロツド２が
カツプリング２７で複数連結された状態で入れら
れ、その先端部にはオーガー３が一体形成してあ
ると共に、ロツド２におけるオーガー３より僅か
下方位置にはノズル６が中空内部２ａと開口連通
して形成され、オーガー３より下方の先端部には
拡大カツタ４が装着してあり、杭１内に挿入する
時には仮想線で示すように収縮した状態とし掘削
時には杭１より外方に拡張した状態とする。 The pile 1 is made of concrete or has a hollow pipe shape such as a steel pipe. Inside the pile 1, a plurality of the rods 2 are connected by couplings 27, and an auger 3 is integrally formed at the tip thereof. At the same time, a nozzle 6 is formed at a position slightly below the auger 3 in the rod 2 and communicates with the hollow interior 2a, and an enlarged cutter 4 is attached to the tip below the auger 3. When it is inserted, it is in a contracted state as shown by the imaginary line, and when it is excavated, it is in an expanded state outward from the pile 1.
４０は圧力流体供給機構であり、根固め用注入
装置４１、第１、第２コンプレツサ４２，４３を
備え、根固め用注入装置４１は第１バルブ４４を
介して第１ホース２９に接続し、第１、第２コン
プレツサ４２，４３は第２、第３バルブ４５，４
６を介して第３ホース３３に接続しかつ第４バル
ブ４７を介して第１ホース２９に接続してあり、
第２ホース３３には第５バルブ４８が設けてあ
る。 40 is a pressure fluid supply mechanism, which includes a root hardening injection device 41, first and second compressors 42, 43, and the foot hardening injection device 41 is connected to the first hose 29 via a first valve 44, The first and second compressors 42 and 43 are connected to the second and third valves 45 and 4.
6 to the third hose 33 and via the fourth valve 47 to the first hose 29;
The second hose 33 is provided with a fifth valve 48 .
５０，５１はオーガ３と連続してロツド２に一
体的に設けた一対のリブであり、土砂排出口３０
まで延設している。 Reference numerals 50 and 51 denote a pair of ribs that are integrally provided on the rod 2 and continuous with the auger 3, and are connected to the earth and sand discharge port 30.
It has been extended to
前記スイベル装置２８は第３図に示す如く構成
してある。 The swivel device 28 is constructed as shown in FIG.
つまり、ギヤケース１７にボルト締めした環体
５２に軸受５３を介して駆動パイプ１８を回転自
在に支承し、該駆動パイプ１８の上端面１８ａに
回転体となる筒状のスイベルシヤフト５４をボル
ト締めし、スイベルシヤフト５４の下部外周に一
対の軸受５５を介してシールブラケツト５６の筒
状部５６ａを回転自在に取付け、このシールブラ
ケツト５６の鍔部５６ｂを、前記環体５２に固設
した筒状のステイ５７の鍔部５７ａ（つまり、固
定側）に弾性部材５８を介してボルト５９で締付
け取付けし、スイベルシヤフト５４の上部外周に
は筒体６０を嵌合し、筒体６０のフランジ６０ａ
をシールブラケツト５６の鍔部５６ｂにボルト６
１で締付け連結して固定体としてある。 That is, the drive pipe 18 is rotatably supported via a bearing 53 on an annular body 52 bolted to the gear case 17, and a cylindrical swivel shaft 54 serving as a rotating body is bolted to the upper end surface 18a of the drive pipe 18. A cylindrical portion 56a of a seal bracket 56 is rotatably attached to the lower outer periphery of the swivel shaft 54 via a pair of bearings 55, and a flange portion 56b of the seal bracket 56 is attached to a cylindrical portion fixed to the annular body 52. A bolt 59 is tightened and attached to the flange 57a (that is, fixed side) of the stay 57 via an elastic member 58, a cylinder 60 is fitted to the upper outer periphery of the swivel shaft 54, and a flange 60a of the cylinder 60 is fitted.
Attach the bolt 6 to the flange 56b of the seal bracket 56.
1 is tightened and connected to form a fixed body.
そして、筒体６０の内周面６０ｂに第１、第
２、第３環状溝６２１，６２２，６２３を形成し
かつＯリング等の第１、第２、第３シール部材６
３１，６３２，６３３をそれぞれ装着してスイベ
ルシヤフト５４の外周面５４ａとの間のシールを
すると共に、第１、第２環状溝６２１，６２２の
中間位置に環状凹部６４を形成し、この環状凹部
６４を逆止弁６５を介して潤滑供給用の加圧機構
６６のグリース室６６ａに連通してグリースが注
入充満するようにしてある。 First, second and third annular grooves 62 1 , 62 2 , 62 3 are formed in the inner circumferential surface 60b of the cylinder 60, and first, second and third seal members 6 such as O-rings are formed.
3 1 , 63 2 , and 63 3 are respectively attached to seal with the outer circumferential surface 54 a of the swivel shaft 54 , and an annular recess 64 is formed at an intermediate position between the first and second annular grooves 62 1 and 62 2 . This annular recess 64 is communicated via a check valve 65 with a grease chamber 66a of a pressurizing mechanism 66 for supplying lubrication so that it is filled with grease.
また、第２環状溝６３２と第３環状溝６３３と
の間には環状室６７が形成され、この環状室６７
はシール洩れ警告機構６８に接続してある。 Further, an annular chamber 67 is formed between the second annular groove 63 2 and the third annular groove 63 3 , and this annular chamber 67
is connected to a seal leak warning mechanism 68.
該シール洩れ警告機構６８は、筐体６９に窓７
０、圧力スイツチ７１、ブザー７２を設け、筐体
６９内に洩れた圧力流体が流入すると窓７０から
目視したり、圧力スイツチ７１が作動したり、ブ
ザー７２が作動したりすることでシール洩れを検
知できるようにしてある。 The seal leakage warning mechanism 68 has a window 7 in the housing 69.
0, a pressure switch 71 and a buzzer 72 are provided, and if leaked pressure fluid flows into the housing 69, it can be visually observed through the window 70, the pressure switch 71 is activated, and the buzzer 72 is activated to prevent seal leakage. It is made to be detectable.
また、前記一対の軸受５５，５５間に形成され
た環状空間７３は前記環状凹部６４内に連通して
グリースが注入充満するようにしてある。 Further, an annular space 73 formed between the pair of bearings 55, 55 communicates with the annular recess 64 and is filled with grease.
７４は前記第１ホース２９が接続される接続管
であり、筒体６０にボルト締めしてある。 Reference numeral 74 designates a connecting pipe to which the first hose 29 is connected, and is bolted to the cylindrical body 60.
また、前記加圧機構６６の加圧室６６ｂは前記
第１ホース２９に接続してあり、圧力流体供給機
構４０からの圧力流体により加圧されると共に、
その圧力は圧力流体の圧力よりも低圧となつてい
る。 Further, the pressurizing chamber 66b of the pressurizing mechanism 66 is connected to the first hose 29, and is pressurized by the pressurized fluid from the pressurized fluid supply mechanism 40.
Its pressure is lower than the pressure of the pressure fluid.
しかして、スイベルシヤフト５４と筒体６０と
の間をシールする第１、第２シール部材６３１，
６３２には潤滑の役目を奏するグリースが加圧供
給されるからシール部材６３１，６３２の摩耗を
低減できる。 Thus, the first and second seal members 63 1 sealing between the swivel shaft 54 and the cylinder body 60,
Grease, which serves as a lubricant, is supplied under pressure to the seal members 63 1 and 63 2 , so that wear of the seal members 63 1 and 63 2 can be reduced.
また、固定体となるシールブラケツト５６は弾
性部材５８を介して固定側となるステイ５７に固
着してあるから、芯ずれ等によりスイベルシヤフ
ト５４が揺動変位した時にシールブラケツト５６
がその揺動変位に追従して揺動変位できるので、
シール部材６３が押しつぶされることがない。こ
のことは杭打機のように長尺なるロツド２を回転
駆動する場合に非常に効果的である。 Furthermore, since the seal bracket 56, which is a fixed body, is fixed to the stay 57, which is a fixed side, through an elastic member 58, when the swivel shaft 54 is oscillated due to misalignment, etc., the seal bracket 56 is fixed.
can follow the oscillating displacement, so
The seal member 63 is not crushed. This is very effective when rotating a long rod 2 such as in a pile driver.
したがつて、シール部材６３の耐久性が向上
し、スイベル装置としての耐久性が向上すること
になる。 Therefore, the durability of the seal member 63 is improved, and the durability of the swivel device is improved.
また、第１、第２シール部材６３１，６３２が
シール不能となつて圧力流体が洩れるとシール洩
れ警告機構６８によりその圧力流体を利用して検
知できるので早期に交換、修理等ができて保守が
容易となる。 Furthermore, if the first and second seal members 63 1 and 63 2 become unable to seal and leak pressure fluid, the seal leak warning mechanism 68 can detect this using the pressure fluid, allowing for early replacement or repair. Maintenance becomes easier.
前記スイベルシヤフト５４の上端部は内向傾斜
面５４ａとなり、圧力流体がスイベルシヤフト５
４内部に流れ易くなつている。 The upper end of the swivel shaft 54 becomes an inwardly inclined surface 54a, and the pressure fluid flows through the swivel shaft 5.
4 It becomes easy to flow inside.
また、逆止弁６５は洩れた圧力流体が加圧機構
６６のグリース室６６ａに流れ込むことを阻止す
る。 Furthermore, the check valve 65 prevents leaked pressure fluid from flowing into the grease chamber 66a of the pressurizing mechanism 66.
また、筐体６９には負圧防止弁７５が設けてあ
る。 Further, the housing 69 is provided with a negative pressure prevention valve 75.
第４図は第２実施例を示し、第１、第２、第
３、第４シール部材６３１，６３２，６３３，６
３４を設け、第１、第２シール部材６３１，６３
２間及び第３、第４シール部材６３３，６３４間
にグリースが注入される環状凹部６４，６４をそ
れぞれ形成し、第２シール部材６３２の下流側及
び第４シール部材６３４の下流側にそれぞれ環状
室６７，６７を形成し、各環状凹部６４を潤滑油
加圧供給機構６６に、各環状室６７をシール洩れ
警告機構６８にそれぞれ接続してある。 FIG. 4 shows a second embodiment, in which first, second, third, and fourth seal members 63 1 , 63 2 , 63 3 , 6
3 4 are provided, and the first and second seal members 63 1 , 63
Annular recesses 64, 64 into which grease is injected are formed between the two seal members 63-2 and between the third and fourth seal members 63-3 , 63-4, respectively. Annular chambers 67, 67 are formed on each side, and each annular recess 64 is connected to a lubricating oil pressure supply mechanism 66, and each annular chamber 67 is connected to a seal leakage warning mechanism 68, respectively.
このようにすれば、圧力流体を２段階にシール
できるので耐久性が向上すると共に、第１、第２
シール部材６３１，６３２より洩れた場合にはそ
の洩れを検知でき、シール不能となる以前に修理
等ができ好ましい。 In this way, the pressure fluid can be sealed in two stages, which improves durability and also seals the pressure fluid in two stages.
If leakage occurs from the sealing members 63 1 , 63 2 , the leakage can be detected and repairs can be carried out before sealing becomes impossible, which is preferable.
なお、この場合にはシール洩れ警告機構６８は
圧力流体が洩れる構造であると全体のシール機能
が低下してしまうので、圧力スイツチ等の圧力流
体が洩れないものが好ましい。 In this case, if the seal leakage warning mechanism 68 has a structure that allows pressure fluid to leak, the overall sealing function will deteriorate, so it is preferable to use a mechanism such as a pressure switch that does not allow pressure fluid to leak.
本考案は以上の様になり、スイベルシヤフト５
４は軸受５５を介して筒状体内に回転自在に支承
され、その筒状体は弾性部材５８を介して固定側
に取着してあるから、芯ずれ等によりスイベルシ
ヤフト５４が揺動変位した時にシールブラケツト
５６その揺動変位に追従して揺動変位できるの
で、シール部材が押しつぶされることがない。こ
のことは杭打機のように長尺なるロツド２を回転
駆動する場合に非常に効果的である。しかも、ス
イベルシヤフト５４と筒状体との間をシールする
第１、第２シール部材６３１，６３２には潤滑の
役目を奏するグリースが加圧供給されるからシー
ル部材６３１，６３２の摩耗を低減できる。 The present invention is as described above, and the swivel shaft 5
4 is rotatably supported in a cylindrical body via a bearing 55, and the cylindrical body is attached to the stationary side via an elastic member 58, so that the swivel shaft 54 may be oscillated due to misalignment or the like. Since the seal bracket 56 can be oscillated to follow the oscillating displacement of the seal bracket 56, the seal member is not crushed. This is very effective when rotating a long rod 2 such as in a pile driver. Moreover, since the first and second seal members 63 1 , 63 2 that seal between the swivel shaft 54 and the cylindrical body are supplied with grease that plays a role of lubrication under pressure, the seal members 63 1 , 63 2 . Can reduce wear.
したがつて、シール部材の耐久性が向上し、ス
イベル装置としての耐久性が向上することにな
る。 Therefore, the durability of the sealing member is improved, and the durability of the swivel device is also improved.
また、第１、第２シール部材６３１，６３２が
シール不能となつて圧力流体が洩れるとシール洩
れ警告機構６８によりその圧力流体を利用して検
知できるので早期に交換、修理等ができて保守が
容易となる。 Furthermore, if the first and second seal members 63 1 and 63 2 become unable to seal and leak pressure fluid, the seal leak warning mechanism 68 can detect this using the pressure fluid, allowing for early replacement or repair. Maintenance becomes easier.
図面は本考案の実施例を示すものであり、第１
図は杭打機の正面図、第２図は要部説明図、第３
図はスイベル装置の断面図、第４図は第２実施例
の要部説明図である。
５４はスイベルシヤフト、５６はシールブラケ
ツト、５７はステイ、５８は弾性部材、６０は筒
体、６３はシール部材。
The drawings show an embodiment of the present invention.
The figure is a front view of the pile driver, the second figure is an explanatory diagram of the main parts, and the third figure is a front view of the pile driver.
The figure is a sectional view of the swivel device, and FIG. 4 is an explanatory view of the main parts of the second embodiment. 54 is a swivel shaft, 56 is a seal bracket, 57 is a stay, 58 is an elastic member, 60 is a cylinder, and 63 is a seal member.
Claims (1)
内に筒状のスイベルシヤフト５４を軸受５５を介
して回転自在に支承すると共に、このスイベルシ
ヤフト５４の外周面５４ａと筒状体の内周面とを
リング状の第１、第２、第３シール部材６３１，
６３２，６３３でシールし、第１シール部材６３
１と第２シール部材６３２との間に環状凹部６４
を形成すると共に、第２シール部材６３２と第３
シール部材６３３との間に環状室６７を形成し、
前記環状凹部６４を加圧機構６６のグリース室６
６ａに接続連通すると共に、前記環状室６７を圧
力流体が流入したことでシール洩れを検知するシ
ール洩れ警告機構６８に接続したことを特徴とす
るスイベル装置。 A cylindrical swivel shaft 54 is rotatably supported in a cylindrical body attached to the stationary side via an elastic member 58 via a bearing 55, and the outer peripheral surface 54a of this swivel shaft 54 and the inner periphery of the cylindrical body ring-shaped first, second, and third seal members 63 1 ,
63 2 and 63 3 , and the first seal member 63
An annular recess 64 between 1 and the second seal member 63 2
and a second seal member 632 and a third seal member 632 .
forming an annular chamber 67 between the seal member 63 and the seal member 63 ;
The annular recess 64 is pressed into the grease chamber 6 of the pressurizing mechanism 66.
6a, and is connected to a seal leakage warning mechanism 68 that detects seal leakage when pressure fluid flows into the annular chamber 67.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981005267U JPS6239190Y2 (en) | 1981-01-20 | 1981-01-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1981005267U JPS6239190Y2 (en) | 1981-01-20 | 1981-01-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57119885U JPS57119885U (en) | 1982-07-26 |
| JPS6239190Y2 true JPS6239190Y2 (en) | 1987-10-06 |
Family
ID=29803646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1981005267U Expired JPS6239190Y2 (en) | 1981-01-20 | 1981-01-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6239190Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7237277B2 (en) * | 2019-04-24 | 2023-03-13 | 三和機材株式会社 | METHOD AND APPARATUS FOR REPAIR TIME ESTIMATION FOR SWIVEL DEVICE USED IN EXCAVATOR |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5528636B2 (en) * | 1976-03-19 | 1980-07-29 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS579515Y2 (en) * | 1978-08-14 | 1982-02-23 |
-
1981
- 1981-01-20 JP JP1981005267U patent/JPS6239190Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5528636B2 (en) * | 1976-03-19 | 1980-07-29 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57119885U (en) | 1982-07-26 |
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