JPS61176725A - Excavator parts - Google Patents

Excavator parts

Info

Publication number
JPS61176725A
JPS61176725A JP1836485A JP1836485A JPS61176725A JP S61176725 A JPS61176725 A JP S61176725A JP 1836485 A JP1836485 A JP 1836485A JP 1836485 A JP1836485 A JP 1836485A JP S61176725 A JPS61176725 A JP S61176725A
Authority
JP
Japan
Prior art keywords
holder
pin
shank
bit
hole
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
Application number
JP1836485A
Other languages
Japanese (ja)
Inventor
Toyoshige Mori
豊重 毛利
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HOURIYOU SANGYO KK
Original Assignee
HOURIYOU SANGYO KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HOURIYOU SANGYO KK filed Critical HOURIYOU SANGYO KK
Priority to JP1836485A priority Critical patent/JPS61176725A/en
Publication of JPS61176725A publication Critical patent/JPS61176725A/en
Pending legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808Teeth
    • E02F9/2816Mountings therefor
    • E02F9/2833Retaining means, e.g. pins

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

PURPOSE:To strongly attach exchangeable bits by a method in which after the shunk of a bit is fitted into the hole of a holder, a pin is driven into a crevice provided formed in the axial direction of the shunk through the upper hole of the holder in such a way as to flex the shunk. CONSTITUTION:To attach a bit 1 to the holder 2 of an excavator in an exchangeable manner, the shunk 6 of the bit 1 is fitted into the hole 14 of a holder 2, and a pin 3 is fitted into the upper pin hole 15 by turning its tapered portion 19 on the tip side. The tapered portion 19 comes to fit into the groove 13 of the crevice 12 provided in the axial direction of the shunk 6, and when the pin 3 is further pushed into it, the tip of the shunk 6 is flexed toward the tip side. The shunk 6 can thus be strongly connected with the holder 2.

Description

【発明の詳細な説明】 産業上の利用分野 この発゛明は、掘さく機械部品、さらに詳しくは、土木
建設機械をはじめとして、鉱山機械、しゅんせつ機械な
どにおいて広く使用される掘さく用、土砂の移送用バケ
ットなどの切刃の部分に取付けられるビットと、その取
付構造に関する。
[Detailed Description of the Invention] Industrial Field of Application This invention is applicable to excavation machine parts, more specifically, to excavation machine parts, earth and sand, which are widely used in civil engineering construction machines, mining machines, dredging machines, etc. This invention relates to a bit that is attached to the cutting edge of a transport bucket, etc., and its attachment structure.

従来技術とその問題点 第5図から第8図は、従来の掘さく機械部品を種々と示
す。いま、同図を参照して従来品の問題点を説明する。
Prior Art and Its Problems Figures 5 to 8 show various parts of conventional digging machines. Now, the problems with the conventional product will be explained with reference to the same figure.

第5図に示す従来品は、ビット(30)をボルト(31
)およびナツト(32)を用いてホルダ(33)に締付
けることによって取付けるものであるが、使用中にボル
ト(31)の頭およびナツト(32)が摩耗するために
、ボルト(31)およびナツト(32)を緩めることが
できなくなり、ビット(30)をホルダ(33)から取
り外せなくなる。
In the conventional product shown in Fig. 5, the bit (30) is connected to the bolt (31).
) and nuts (32) to the holder (33). However, as the heads of the bolts (31) and nuts (32) wear out during use, the bolts (31) and nuts (32) wear out. 32) cannot be loosened, and the bit (30) cannot be removed from the holder (33).

第6図に示す従来品は、ビット(34)にテーバ部(3
5)が、ホルダ(36)にテーパ孔(37)がそれぞれ
形成され、テーバ部(35)とテーパ孔(37)を互い
にはめ合わせることによってビット(34)をホルダ(
36)に取付けるものであるが、テーバ部(35)およ
びテーパ孔(37)の加工にかなりの寸法精度を必要と
するためにコスト高となり、かつテーパの作用のみによ
るビット(34)とホルダ(36)の連結強度が充分で
ない。
The conventional product shown in Fig. 6 has a taper part (3) on the bit (34).
5), tapered holes (37) are formed in the holder (36), and the bit (34) is inserted into the holder (37) by fitting the tapered portion (35) and the tapered hole (37) into each other.
36), but it requires high dimensional accuracy in machining the taper part (35) and the taper hole (37), resulting in high costs, and the bit (34) and holder ( 36) The connection strength is not sufficient.

第7図に示す従来品は、ビット(38)に有底孔(39
)が、ホルダ(40)に有底孔(39)が密接する突出
部(41)がそれぞれ形成され、有底孔(39)に突出
部(41)をはめ合せ、かつはめ合わせた部分を貫通す
るようにビット(38)およびホルダ(40)にピン(
42)を打も込むことによってビット(38)をホルダ
(40)に取付けるものであるが、両者の形状が複雑で
あり、製造上の都合によって材質が鋳鋼に限定されるた
めに、硬度が低くて摩耗し易い。
The conventional product shown in Fig. 7 has a bottomed hole (39) in the bit (38).
), a protrusion (41) is formed in the holder (40), and the protrusion (41) is in close contact with the bottomed hole (39), and the protrusion (41) is fitted into the bottomed hole (39), and the fitted portion is penetrated. Attach the pin (38) and holder (40) to
The bit (38) is attached to the holder (40) by driving the bit (38) into the holder (40), but the shape of both is complicated and the material is limited to cast steel due to manufacturing reasons, so the hardness is low. It is easy to wear out.

第8図に示す従来品は、ビット(43)にシャンク(4
4)が設けられるとともに、シャンク(44)の外面に
切り欠き(45)が設けられ、ホルダ(46)にシャン
ク(44)のはめ入れられる保持孔(47)が設けられ
るとともに、この保持孔(47)に直交するねじ孔(4
8)が設けられ、シャンク(44)を保持孔(41)に
はめ入れるとともに、ねじ孔(48)にボルト(49)
をねじ込んでその先端を切り欠き(45)内に突出させ
ることによってビット(43)をホルダ(46)に取付
けるものであるが、ねじ孔(48)に錆が発生するとボ
ルト(49)を使用することができなくなるために、長
期にわたっての使用が不可能であり、また第5図のもの
と同様にボルト(49)の頭部が摩耗するといった問題
点もある。
The conventional product shown in Fig. 8 has a bit (43) with a shank (4
4), a notch (45) is provided on the outer surface of the shank (44), and a holding hole (47) into which the shank (44) is fitted is provided in the holder (46). 47) perpendicular to the screw hole (4
8) is provided, and the shank (44) is fitted into the holding hole (41), and the bolt (49) is inserted into the screw hole (48).
The bit (43) is attached to the holder (46) by screwing in and having its tip protrude into the notch (45), but if rust occurs in the screw hole (48), a bolt (49) is used. This makes it impossible to use the bolt for a long period of time, and there is also the problem that the head of the bolt (49) wears out, as in the case of the bolt (49) shown in FIG.

この発明の目的は、上記問題点をすべて解決した掘さく
機械部品を提供することにある。
An object of the present invention is to provide an excavating machine component that solves all of the above problems.

問題点を解決するための手段 この発明による掘さく機械部品は、シャンクを有するビ
ットと、シャンクがはめ入れられる保持孔を有するホル
ダと、ビットとホルダを連結固定するピンとからなり、
シャンクにその軸中心方向にのびた割れ目が設けられる
とともに、その対向面にピンをはめる一対の溝がシャン
クの軸中心と直交する方向に対向状に設けられ、保持孔
にシャンクがはめ入れられた状態で溝の両端部とそれぞ
れ相対するようにホルダに一対のピン孔が設けられ、シ
ャンクの割れ目の両側の部分が互いに離隔する方向にた
わみうるように保持孔に拡張部が設けられ、両溝の内面
が互いにピンを挾んでなす最小離隔距離よりピンの幅が
大きく形成され、ピンの先端にテーバ部が設けられてい
るものである。
Means for Solving the Problems A digging machine component according to the present invention comprises a bit having a shank, a holder having a holding hole into which the shank is fitted, and a pin for connecting and fixing the bit and the holder.
A condition in which the shank is provided with a crack extending in the direction of its axial center, and a pair of grooves into which the pin is fitted are provided in opposing faces in a direction perpendicular to the shank's axial center, and the shank is fitted into the holding hole. A pair of pin holes are provided in the holder so as to face both ends of the groove, respectively, and an expanded portion is provided in the holding hole so that the portions on both sides of the crack in the shank can be bent in the direction of separating from each other. The width of the pin is larger than the minimum separation distance formed by the inner surfaces sandwiching the pins, and a tapered portion is provided at the tip of the pin.

実  施  例 掘さく機械部品は、第1図から第3図に示すように、ビ
ット(1)と、これのホルダ(2)と、ビット(1)と
ホルダ(2)を連結固定するピン(3)とからなるもの
であり、これは第4図に示すように、トラクタショベル
のパケット(4)の切刃の部分に、ホルダ(2)が溶接
されることにより、一定間隔をおいて多数取付けられて
いる。
As shown in Figures 1 to 3, the excavating machine parts include a bit (1), a holder (2) thereof, and a pin (2) that connects and fixes the bit (1) and the holder (2). 3), as shown in Figure 4, the holder (2) is welded to the cutting edge of the packet (4) of the tractor excavator, so that a large number of installed.

ビット(1)は、刃先部(5)と、これより後向きにの
びたシャンク(6)とからなる。刃先部(5)とシャン
ク(6)の境界には段部(7)が設けられている。ビッ
ト(1)の全体は、剛性および耐摩耗性のある特殊鋼に
よって一体的に成形されたものであるが、熱処理を施す
ことにより、とくにシャンク(6)にはたわみ性が付与
されている。刃先部(5)の後端部(8)は横断面縦長
の方形であるが、その後端部(8)より前方の部分は前
下りの傾斜状に形成されてその先端が刃先(9)とされ
ている。
The bit (1) consists of a cutting edge (5) and a shank (6) extending rearward from the cutting edge (5). A stepped portion (7) is provided at the boundary between the cutting edge portion (5) and the shank (6). The entire bit (1) is integrally molded from special steel that is rigid and wear-resistant, but the shank (6) in particular is given flexibility by heat treatment. The rear end (8) of the cutting edge (5) has a vertically elongated rectangular cross section, but the part in front of the rear end (8) is sloped forward downward, and its tip meets the cutting edge (9). has been done.

シャンク(6)は、刃先部(5)の後端部(8)の横断
面より小さくてほぼ相似形の方形に形成されている。シ
ャンク(6)の長さ方向中心部には上下方向にのびた貫
通孔(10)が設けられている。そしてシャンク(6)
の軸方向中心部にはその後端より前向きにのびて貫通孔
(10)に至る割れ目(11)が設けられている。割れ
目(11)は左右方向に相対する対向面(12)を有し
ており、その対向面(12)の後端部に上下方向にのび
た溝(13)が形成されている。溝(13)は断面半円
形であるが、その半径はピン(3)の半径より小さいた
めに、溝(13)の内面とピン(3)の外周面とは接す
ることがなく、溝(13)の開口端縁とピン(3)の外
周面とが接している。
The shank (6) is formed into a rectangular shape that is smaller in cross section than the rear end (8) of the cutting edge (5) and has a substantially similar shape. A through hole (10) extending vertically is provided in the longitudinal center of the shank (6). and shank (6)
A crack (11) extending forward from the rear end and reaching the through hole (10) is provided at the center in the axial direction. The crack (11) has opposing surfaces (12) facing each other in the left-right direction, and a groove (13) extending in the vertical direction is formed at the rear end of the opposing surface (12). The groove (13) has a semicircular cross section, but since its radius is smaller than the radius of the pin (3), the inner surface of the groove (13) and the outer peripheral surface of the pin (3) do not come into contact with each other. ) is in contact with the outer peripheral surface of the pin (3).

ホルダ(2)は、シャンク(6)の全体がはめ入れられ
た保持孔(14)を有する角筒状のものである。保持孔
(14)にシャンク(6)がはめ入れられた状態でホル
ダ(2)の外周面と刃先部(5)の後端部(8)の外周
面とは面一であり、かつホルダ(2)の前端面にビット
(1)の段部(7)が密接しており、この状態で溝(1
3)の両端部と相対するようにホルダ(2)に一対の上
下部ピン孔(15016)が互いに一直線状に設けられ
ている。また、上下部ピン孔(15)(16)を上下方
向より見た場合に上下部ピン孔(15)(16)は両溝
(13)と重なり合い、かつ内部に両溝(13)のほぼ
全体を見ることができる。保持孔(14)の内周面は全
体としてシャンク(6)外周面とほぼ同じ大きさに形成
されているが、同内周面と外周面の間には両者がゆるく
はめあわされる程度のはめあいに必要な隙間は存在して
いる。ざらに、保持孔(14)の内周面には、その4面
のうち、左右両面にたわませられるシャンク(6)の逃
げとなる拡張部(17)が対向状に設けられている。
The holder (2) has a rectangular tube shape and has a holding hole (14) into which the entire shank (6) is fitted. When the shank (6) is fitted into the holding hole (14), the outer peripheral surface of the holder (2) and the outer peripheral surface of the rear end (8) of the cutting edge (5) are flush with each other, and the holder ( The stepped part (7) of the bit (1) is in close contact with the front end surface of the bit (2), and in this state, the groove (1)
A pair of upper and lower pin holes (15016) are provided in the holder (2) in a straight line with each other so as to face both ends of the holder (2). In addition, when the upper and lower pin holes (15) and (16) are viewed from the vertical direction, the upper and lower pin holes (15) and (16) overlap with both grooves (13), and almost the entirety of both grooves (13) is inside. can be seen. The inner circumferential surface of the holding hole (14) is generally formed to have approximately the same size as the outer circumferential surface of the shank (6), but there is a fit between the inner circumferential surface and the outer circumferential surface such that both are loosely fitted. The necessary gap exists. Roughly speaking, on the inner circumferential surface of the holding hole (14), expansion portions (17) are provided facing each other to provide relief for the shank (6) which can be deflected on both the left and right sides of the four sides.

拡張部(17)は、同左右両面のほぼ後半部に存在する
くぼみであり、その前後方向の長さはシャンク(6)の
割れ目(11)の長さと対応している。
The expanded portion (17) is a recess that exists approximately in the rear half of both the left and right sides, and its length in the front-rear direction corresponds to the length of the crack (11) of the shank (6).

これらの左右の拡張部(17)とその前方の保持孔(1
4)の内周面との境界には90度の角度をなす角(18
)がそれぞれ設けられている。
These left and right extensions (17) and the holding hole (1) in front of them
4) has a 90 degree angle (18
) are provided for each.

ピン(3)は、丸棒状のものであって、ホルダ(2)の
上下方向の長さと同じ長さを有しており、上下部ピン孔
(15)(16)にまたがってはめられている。この状
態でピン(3)の中間部外周面は溝(13)の開口端縁
と密接し、かつシ第ンク(6)は角(18)を支点とし
てその割れ目(11)の左右両側の部分が互いに離隔す
る方向にたわんでいる。その最大たわみは、ピン(3)
の最大外径(D)より両溝(13)の内面が互いにピン
(3)を取り囲んでなす最小離隔距離(L)を差し引い
た大きさである。すなわち、ピン(3)の最大外径(D
)は同離隔距離(L)より大きい。そして、ピン(3)
の一端にはテーパ部(19)が設けられており、テーパ
部(19)の先端部外径(d)は同離隔距離(L)より
小さい。
The pin (3) is in the shape of a round bar, has the same length as the vertical length of the holder (2), and is fitted across the upper and lower pin holes (15) and (16). . In this state, the outer circumferential surface of the intermediate portion of the pin (3) is in close contact with the opening edge of the groove (13), and the third hole (6) is located on both left and right sides of the crack (11) with the corner (18) as the fulcrum. are bent in the direction of moving away from each other. Its maximum deflection is pin (3)
It is the size obtained by subtracting the minimum separation distance (L) between the inner surfaces of both grooves (13) surrounding the pin (3) from the maximum outer diameter (D) of the pin (3). That is, the maximum outer diameter (D
) is larger than the same separation distance (L). And pin (3)
A tapered portion (19) is provided at one end, and the outer diameter (d) of the tip of the tapered portion (19) is smaller than the separation distance (L).

ビット(1)をホルダ(2)に取付けるには、つぎの手
順による。まず、図示のようにビット(1)のシャンク
(6)をホルダ(2)の保持孔(14)にはめ入れる。
The following procedure is used to attach the bit (1) to the holder (2). First, as shown in the figure, the shank (6) of the bit (1) is fitted into the holding hole (14) of the holder (2).

こうしておいて、ピン(3)を上部ピン孔(15)にそ
のテーパ部(19)を先にしてこれが溝(13)の上端
部に当たる位置まではめ入れる。そうすると、ピン(3
)は入り難くなるが、それを強制的に押し込むと、テー
パ部(19)がくさび作用によってシャンク(6)をた
わませる。そして、テーパ部(13)が下部ピン孔(1
6)まで入り込むようにピン(3)の全体を押し込む。
In this manner, the pin (3) is fitted into the upper pin hole (15) with its tapered part (19) first until it touches the upper end of the groove (13). Then, the pin (3
) will be difficult to insert, but if you force it in, the tapered part (19) will deflect the shank (6) by a wedge action. Then, the tapered part (13) is connected to the lower pin hole (1
Push in the entire pin (3) so that it goes in as far as 6).

こうしてシャンク(6)をたわませると、シャンク(6
)はホルダ(2)から扱は出られなくなる。しかも、シ
ャンク(6)をたわませるためのピン(3)による外力
の反力はホルダ(2)の角(18)に集中して作用する
ために、その扱は止めの力は強力である。さらに、シャ
ンク(6)がたわむことにより、シャンク(6)のはめ
あいのための隙間に基づくがたつきもなくなり、かつシ
ャンク(6)とホルダ(2)との間には同外力および反
力が常時作用するために、両者の連結力は強固なものと
なる。
When the shank (6) is bent in this way, the shank (6)
) can no longer be handled from holder (2). Moreover, since the reaction force of the external force caused by the pin (3) for deflecting the shank (6) acts concentratedly on the corner (18) of the holder (2), the force to stop the handling is strong. . Furthermore, by bending the shank (6), rattling due to the gap for fitting of the shank (6) is also eliminated, and the same external force and reaction force are eliminated between the shank (6) and the holder (2). Since it acts constantly, the connection between the two becomes strong.

ビット(1)をホルダ(2)から取外すには、上述の手
順と逆の手順により、ピン(3)を抜き取り、シャンク
(6)を保持孔(14)から抜き出せばよい。
To remove the bit (1) from the holder (2), the pin (3) can be removed and the shank (6) can be removed from the holding hole (14) by reversing the above-mentioned procedure.

発明の効果 この発明によれば、ビットのシャンクをホルダの保持孔
にはめ入れておいて、ピンをピン孔に強制的に押し込む
ことにより、ピンのテーパ部のくさび作用によってシャ
ンクをたわませることにより、ビットをホルダに取付け
るようにしているから、その操作は至って簡単であるし
、シャンクをたわませるための外力とこれの反力とがビ
ットとホルダの間に作用するために、両者の連結力は強
固である。
Effects of the Invention According to this invention, by fitting the shank of the bit into the holding hole of the holder and forcibly pushing the pin into the pin hole, the shank is deflected by the wedge action of the tapered portion of the pin. Since the bit is attached to the holder using the shank, the operation is extremely simple, and since the external force for deflecting the shank and the reaction force act between the bit and the holder, both The connection strength is strong.

【図面の簡単な説明】[Brief explanation of drawings]

第1図から第4図はこの発明の実施例を示し、第1図は
部分断面を含む平面図、第2図および第3図は第1図の
それぞれ■−■線、■−■線にそう断面図、第4図は使
用状態の一例を示す斜視図、第5図から第8図はそれぞ
れ従来例を示す側面図である。 (1)・・・ビット、(2)・・・ホルダ、(3)・・
・ピン、(5)・・・刃先部、(6)・・・シャンク、
(13)・・・溝、(14)・・・保持孔、(15)(
16)・・・ピン孔、(17)・・・拡張部、(19)
・・・テーパ部。 以  上 外4名
1 to 4 show an embodiment of the present invention, FIG. 1 is a plan view including a partial cross section, and FIGS. 2 and 3 are taken along the lines ■-■ and ■-■ in FIG. 1, respectively. 4 is a perspective view showing an example of a state of use, and FIGS. 5 to 8 are side views showing a conventional example. (1)...Bit, (2)...Holder, (3)...
・Pin, (5)...Blade tip, (6)...Shank,
(13)... Groove, (14)... Holding hole, (15) (
16)...Pin hole, (17)...Expansion part, (19)
...Tapered part. 4 people other than the above

Claims (1)

【特許請求の範囲】[Claims] シャンク(6)を有するビット(1)と、シャンク(6
)がはめ入れられる保持孔(14)を有するホルダ(2
)と、ビット(1)とホルダ(2)を連結固定するピン
(3)とからなり、シャンク(6)にその軸中心方向に
のびた割れ目(11)が設けられるとともに、その対向
面(12)にピン(3)をはめる一対の溝(13)がシ
ャンク(6)の軸中心と直交する方向に対向状に設けら
れ、保持孔(14)にシャンク(6)がはめ入れられた
状態で溝(13)の両端部とそれぞれ相対するようにホ
ルダ(2)に一対のピン孔(15)(16)が設けられ
、シャンク(6)の割れ目(11)の両側の部分が互い
に離隔する方向にたわみうるように保持孔(14)に拡
張部(17)が設けられ、両溝(13)の内面が互いに
ピン(3)を挾んでなす最小離隔距離(L)よりピン(
3)の幅が大きく形成され、ピン(3)の先端にテーパ
部(19)が設けられている掘さく機械部品。
a bit (1) with a shank (6);
) has a holding hole (14) into which the holder (2
) and a pin (3) for connecting and fixing the bit (1) and the holder (2), and the shank (6) is provided with a crack (11) extending in the direction of its axial center, and the opposing surface (12) A pair of grooves (13) into which the pin (3) is fitted are provided facing each other in a direction perpendicular to the axial center of the shank (6), and when the shank (6) is fitted into the holding hole (14), the grooves A pair of pin holes (15) and (16) are provided in the holder (2) so as to face both ends of the shank (13), respectively, so that the parts on both sides of the crack (11) of the shank (6) are spaced apart from each other. An expansion part (17) is provided in the holding hole (14) so that the holding hole (14) can be bent, and the pin (
3) An excavating machine part having a large width and having a tapered part (19) at the tip of the pin (3).
JP1836485A 1985-01-31 1985-01-31 Excavator parts Pending JPS61176725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1836485A JPS61176725A (en) 1985-01-31 1985-01-31 Excavator parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1836485A JPS61176725A (en) 1985-01-31 1985-01-31 Excavator parts

Publications (1)

Publication Number Publication Date
JPS61176725A true JPS61176725A (en) 1986-08-08

Family

ID=11969640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1836485A Pending JPS61176725A (en) 1985-01-31 1985-01-31 Excavator parts

Country Status (1)

Country Link
JP (1) JPS61176725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009150124A (en) * 2007-12-20 2009-07-09 Echigo Shoji Kk Lateral pin used for lateral pin mounting device of working machine bucket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009150124A (en) * 2007-12-20 2009-07-09 Echigo Shoji Kk Lateral pin used for lateral pin mounting device of working machine bucket

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