JP2020114967A - Lock pin, lock structure, attachment, and lock method - Google Patents

Lock pin, lock structure, attachment, and lock method Download PDF

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JP2020114967A
JP2020114967A JP2019006156A JP2019006156A JP2020114967A JP 2020114967 A JP2020114967 A JP 2020114967A JP 2019006156 A JP2019006156 A JP 2019006156A JP 2019006156 A JP2019006156 A JP 2019006156A JP 2020114967 A JP2020114967 A JP 2020114967A
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lock pin
support member
groove
end portion
tip
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裕明 菊地
Hiroaki Kikuchi
裕明 菊地
高広 木船
Takahiro Kibune
高広 木船
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Mitsubishi Steel Mfg Co Ltd
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Mitsubishi Steel Mfg Co Ltd
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Abstract

To facilitate manufacturing of a lock pin.SOLUTION: A lock pin 130 includes: a metallic base end 131; and a tip 132 of an elastic material which is formed on one end side of the base end 131. A lock structure of a tooth 100 using the lock pin 130 includes: a support member 110 which is provided in a bucket of a shovel; a replacement member 120 which is detachably mounted in the support member 110; and a lock pin 130 which connects and fixes the support member 110 and the replacement member 120. The lock pin 130 has a longitudinal direction arranged along a detaching direction of the replacement member 120 and generates force for pressing the replacement member 120 in the direction of the support member 110 in a state of being mounted in the support member 110 and the replacement member 120.SELECTED DRAWING: Figure 9

Description

本開示は、ロックピン、ロック構造、アタッチメント、及びロック方法に関する。 The present disclosure relates to a lock pin, a lock structure, an attachment, and a lock method.

対象物に取り付けられるアタッチメントの一例として、ショベルに搭載されるバケットの掘削側の先端部分に脱着可能に取り付けられる複数のツース（掘削具）が挙げられる。ツースは、バケットに固定される基端側の支持部材と、この支持部材に嵌合される先端側の取替部材とを備える。取替部材は、支持部材に取り付けられた状態で、ロック部材が貫入されて支持部材に連結固定される（例えば特許文献１）。 As an example of an attachment attached to an object, a plurality of teeth (excavator) detachably attached to an excavation-side tip portion of a bucket mounted on a shovel. The tooth includes a base end side support member fixed to the bucket and a tip end side replacement member fitted to the support member. The replacement member is fixed to the support member by being inserted into the lock member while being attached to the support member (for example, Patent Document 1).

特許第５０５４７５８号公報Japanese Patent No. 5054758

特許文献１に記載されるロック部材は、ツースへの嵌合・解除を行いやすくすべく、本体、弾性部材、モールドの三層構造となっている。三層構造ではロック部材（ロックピン）の製造に手間がかかる。 The lock member described in Patent Document 1 has a three-layer structure of a main body, an elastic member, and a mold in order to facilitate fitting and releasing of the tooth. In the three-layer structure, it takes time to manufacture the lock member (lock pin).

本開示は、製造を容易にできるロックピン、ロック構造、アタッチメント、及びロック方法を提供することを目的とする。 The present disclosure aims to provide a lock pin, a lock structure, an attachment, and a lock method that can be easily manufactured.

本発明の実施形態の一観点に係るロックピンは、金属製の基端部と、前記基端部の一端側に形成された弾性材料の先端部と、を備える。 A lock pin according to one aspect of the embodiment of the present invention includes a metal base end portion and a tip end portion of an elastic material formed on one end side of the base end portion.

本発明の実施形態の一観点に係るロック構造は、対象物に設けられる支持部材と、前記支持部材に脱着可能に取り付けられる取替部材と、前記支持部材と前記取替部材とを連結固定するロックピンと、を備え、前記ロックピンは、金属製の基端部と、前記ロックピンの長手方向に沿って前記基端部の一端側に形成された弾性材料の先端部と、を備え、前記支持部材と前記取替部材とに取り付けられた状態で、前記長手方向が前記取替部材の脱着方向に沿って配置され、前記取替部材を前記支持部材の方向へ押圧する力を発生する。 A lock structure according to one aspect of the embodiment of the present invention connects and fixes a support member provided on an object, a replacement member detachably attached to the support member, and the support member and the replacement member. A lock pin, wherein the lock pin includes a metal base end portion and a tip end portion of an elastic material formed on one end side of the base end portion along a longitudinal direction of the lock pin, The longitudinal direction is arranged along the attachment/detachment direction of the replacement member in a state of being attached to the support member and the replacement member, and a force for pressing the replacement member toward the support member is generated.

同様に、本発明の実施形態の一観点に係るアタッチメントは、対象物に取り付けられるアタッチメントであって、前記対象物に設けられる支持部材と、前記支持部材の先端の凸部が挿入される凹部が基端に設けられ、所定方向に突出して延在する取替部材と、前記取替部材の延在方向と交差する側方の位置にて前記支持部材に設けられる溝と、前記側方の位置にて前記取替部材に設けられ、前記取替部材が前記支持部材に嵌合した状態において前記溝の一部が露出するよう配置される孔と、前記孔及び前記溝により形成される内部空間に嵌入され、前記取替部材と前記支持部材とを連結固定する、ロックピンと、を備え、前記ロックピンは、金属製の基端部と、前記ロックピンの長手方向に沿って前記基端部の一端側に形成された弾性材料の先端部と、を備え、前記ロックピンは、前記内部空間に嵌入された状態では、その長手方向が前記取替部材の延在方向に沿って配置され、前記支持部材の溝を前記長手方向の一方側に押圧し、前記取替部材の孔の内壁を前記長手方向の他方側に押圧する。 Similarly, an attachment according to one aspect of the embodiment of the present invention is an attachment that is attached to an object, and includes a support member provided on the object, and a concave portion into which a convex portion at the tip of the support member is inserted. A replacement member that is provided at the base end and that projects and extends in a predetermined direction, a groove that is provided in the support member at a lateral position that intersects the extending direction of the replacement member, and the lateral position A hole provided in the replacement member so as to expose a part of the groove when the replacement member is fitted to the support member, and an internal space formed by the hole and the groove A lock pin that is fitted into the lock member and connects and fixes the replacement member and the support member, wherein the lock pin has a metal base end and the base end along the longitudinal direction of the lock pin. A distal end portion of an elastic material formed on one end side of the lock pin, the lock pin, when fitted in the internal space, the longitudinal direction thereof is arranged along the extending direction of the replacement member, The groove of the support member is pressed to one side in the longitudinal direction, and the inner wall of the hole of the replacement member is pressed to the other side in the longitudinal direction.

同様に、本発明の実施形態の一観点に係るロック方法は、対象物に設けられる支持部材と、前記支持部材の先端の凸部が挿入される凹部が基端に設けられ、所定方向に突出して延在する取替部材と、前記取替部材の延在方向と交差する側方の位置にて前記支持部材に設けられる溝と、前記側方の位置にて前記取替部材に設けられ、前記取替部材が前記支持部材に嵌合した状態において前記溝の一部が露出するよう配置される孔と、前記孔及び前記溝により形成される内部空間に嵌入され、前記取替部材と前記支持部材とを連結固定する、ロックピンと、を備えるアタッチメントのロック方法であって、金属製の基端部と、前記ロックピンの長手方向に沿って前記基端部の一端側に形成された弾性材料の先端部と、を備える前記ロックピンを、前記孔から前記内部空間へ前記先端部が最奥部に突き当たるまで挿入するステップと、前記先端部を長手方向に押圧して弾性圧縮しつつ、前記先端部を中心として前記ロックピンを前記溝の方向に回動させるステップと、前記ロックピンが、前記長手方向が前記取替部材の脱着方向に沿って配置され、前記取替部材を前記支持部材の方向へ押圧する力を発生させて、前記支持部材と前記取替部材とに取り付けられるステップと、を含む。 Similarly, in the locking method according to one aspect of the embodiment of the present invention, a supporting member provided on an object and a concave portion into which a convex portion of the distal end of the supporting member is inserted are provided at the proximal end and project in a predetermined direction. An extending replacement member, a groove provided in the support member at a lateral position intersecting the extending direction of the replacement member, and provided in the replacement member at the lateral position, A hole that is arranged so that a part of the groove is exposed when the replacement member is fitted to the support member, and is fitted into an internal space formed by the hole and the groove, and the replacement member and the A method of locking an attachment, comprising a lock pin for connecting and fixing a support member, comprising: a metal base end portion; and an elasticity formed on one end side of the base end portion along a longitudinal direction of the lock pin. The tip of the material, the lock pin comprising, until inserting the tip into the inner space from the hole until the tip hits the innermost portion, while pressing the tip in the longitudinal direction to elastically compress, Rotating the lock pin in the direction of the groove about the tip, and the lock pin is arranged such that the longitudinal direction is along the attaching/detaching direction of the replacement member, and the support member supports the replacement member. A force is applied in the direction of the member to attach it to the support member and the replacement member.

本開示によれば、製造を容易にできるロックピン、ロック構造、アタッチメント、及びロック方法を提供することができる。 According to the present disclosure, it is possible to provide a lock pin, a lock structure, an attachment, and a lock method that can be easily manufactured.

実施形態に係るツース（アタッチメント）の組立斜視図Assembly perspective view of the tooth (attachment) according to the embodiment 図１に示すツースの分解斜視図The exploded perspective view of the tooth shown in FIG. ツースのｘ方向に沿った縦断面図Longitudinal section view along the x direction of the tooth 図３中のＡ−Ａ断面図であり、第１支持面を示す図FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3, showing a first support surface. 図３中のＢ−Ｂ断面図であり、第２支持面を示す図It is a BB sectional view in FIG. 3, and is a figure which shows a 2nd support surface. ロックピンの斜視図Lock pin perspective view ロックピンの取り付け手順の第１段階（解放状態）を示す図The figure which shows the 1st step (released state) of the attachment procedure of a lock pin ロックピンの取り付け手順の第２段階（中間状態）を示す図The figure which shows the 2nd step (intermediate state) of the attachment procedure of a lock pin. ロックピンの取り付け手順の第３段階（固定状態）を示す図The figure which shows the 3rd step (fixed state) of the attachment procedure of a lock pin

以下、添付図面を参照しながら実施形態について説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。 Hereinafter, embodiments will be described with reference to the accompanying drawings. In order to facilitate understanding of the description, the same reference numerals are given to the same constituent elements in each drawing as much as possible, and overlapping description will be omitted.

本実施形態では、実施形態に係るアタッチメントの一例としてのツース１００を例示して説明する。 In this embodiment, the tooth 100 as an example of the attachment according to the embodiment will be described as an example.

各図において、ｘ方向、ｙ方向、ｚ方向は互いに垂直な方向である。ｘ方向はツース１００の支持部材１１０に対する取替部材１２０の嵌合方向であり、取付状態のロックピン１３０の長手方向である。ｙ方向はツース１００の幅方向である。ｚ方向はツース１００の高さ方向であり、ロックピン１３０を溝に嵌合する際の回転軸の方向である。 In each figure, the x direction, the y direction, and the z direction are directions perpendicular to each other. The x direction is the fitting direction of the replacement member 120 with respect to the support member 110 of the tooth 100, and is the longitudinal direction of the lock pin 130 in the attached state. The y direction is the width direction of the tooth 100. The z direction is the height direction of the tooth 100, and is the direction of the rotation axis when the lock pin 130 is fitted in the groove.

まず図１〜図５を参照して実施形態に係るツース１００の構成を説明する。図１は、実施形態に係るツース１００（アタッチメント）の組立斜視図である。図２は、図１に示すツース１００の分解斜視図である。図３はツース１００のｘ方向に沿った縦断面図である。図４は、図３中のＡ−Ａ断面図であり、第１支持面１１２ａ、１１２ｂを示す図である。図５は、図３中のＢ−Ｂ断面図であり、第２支持面１１３ａ、１１３ｂを示す図である。 First, the configuration of the tooth 100 according to the embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is an assembled perspective view of a tooth 100 (attachment) according to the embodiment. FIG. 2 is an exploded perspective view of the tooth 100 shown in FIG. FIG. 3 is a vertical cross-sectional view of the tooth 100 along the x direction. FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3, showing the first support surfaces 112a and 112b. FIG. 5 is a cross-sectional view taken along line BB in FIG. 3, showing the second support surfaces 113a and 113b.

ツース１００は、例えばショベルのバケット（対象物）の掘削側の先端部分に複数設けられる。ツース１００は、バケット先端部分からｘ方向に突出し、かつ、ｙ方向に沿って略等間隔で複数個が並設される。以下の説明では、ツース１００の延在方向のうちｘ負方向側を「基端側」、ｘ正方向側を「先端側」とも表記する。 A plurality of teeth 100 are provided, for example, at the tip end portion on the excavation side of the bucket (object) of the shovel. A plurality of teeth 100 protrude in the x direction from the bucket tip portion, and a plurality of teeth 100 are arranged in parallel along the y direction at substantially equal intervals. In the following description, the x negative direction side of the extending direction of the tooth 100 is also referred to as “proximal end side”, and the x positive direction side is also referred to as “distal end side”.

図１、図２に示すように、ツース１００は、支持部材１１０、取替部材１２０、ロックピン１３０を備える。 As shown in FIGS. 1 and 2, the tooth 100 includes a support member 110, a replacement member 120, and a lock pin 130.

支持部材１１０は、ツース１００の基端側に配置され、バケットの先端部分に固定される。 The support member 110 is arranged on the base end side of the tooth 100 and is fixed to the tip portion of the bucket.

取替部材１２０は、ツース１００の先端側に配置され、支持部材１１０に嵌合されて脱着可能に取り付けられる。取替部材１２０は、爪状の部材であって、ショベルの掘削作業等の繰り返しによって摩耗した場合には、支持部材１１０から取り外されて交換することができる。 The replacement member 120 is arranged on the tip end side of the tooth 100, fitted to the support member 110, and detachably attached. The replacement member 120 is a claw-shaped member, and can be removed from the support member 110 and replaced when it is worn out due to repeated excavation work of a shovel or the like.

ロックピン１３０は、支持部材１１０に嵌合された取替部材１２０を連結固定するために装着される。 The lock pin 130 is mounted to connect and fix the replacement member 120 fitted to the support member 110.

図２、図３に示すように、支持部材１１０の先端側の端部にはｘ正方向に突出した凸部１１１が設けられる。図３に示すように、取替部材１２０の基端側の端部には、この凸部１１１が嵌合する凹部１２１が設けられる。 As shown in FIGS. 2 and 3, a convex portion 111 protruding in the positive x direction is provided at the end portion on the tip side of the support member 110. As shown in FIG. 3, a recess 121 into which the projection 111 is fitted is provided at the end of the replacement member 120 on the base end side.

凸部１１１は、ｚ方向の寸法が基端から先端になるほど小さくなるくさび状であり、ｚ正方向側、ｚ負方向側の主面１１１ａ、１１１ｂは共に傾斜面となっている。凸部１１１のｚ正方向側の主面１１１ａには、第１支持面１１２ａと第２支持面１１３ａとが設けられる。第１支持面１１２ａと第２支持面１１３ａは、共にｚ正方向側に突出した曲面であり、ｙ方向の両側から中央にかけて徐々に突出し、ｙ方向の中央が最もｚ正方向側に突出する曲面である。第１支持面１１２ａは、この傾斜状の主面１１１ａの基端側に設けられ、第２支持面１１３ａは第１支持面１１２ａより先端側に設けられる。第１支持面１１２ａの頭頂部は、第２支持面１１３ａの頭頂部よりｚ正方向側に突出している。 The convex portion 111 has a wedge shape in which the dimension in the z direction becomes smaller from the base end to the tip end, and the main surfaces 111a and 111b on the z positive direction side and the z negative direction side are both inclined surfaces. A first support surface 112a and a second support surface 113a are provided on the main surface 111a of the convex portion 111 on the positive z direction side. Both the first support surface 112a and the second support surface 113a are curved surfaces projecting in the z positive direction side, and gradually project from both sides in the y direction toward the center, and the center in the y direction projects the most in the z positive direction side. Is. The first support surface 112a is provided on the base end side of the inclined main surface 111a, and the second support surface 113a is provided on the tip side of the first support surface 112a. The crown of the first support surface 112a projects in the positive z direction from the crown of the second support surface 113a.

同様に、凸部１１１のｚ負方向側の主面１１１ｂにも、第１支持面１１２ｂと第２支持面１１３ｂとが設けられる。第１支持面１１２ｂと第２支持面１１３ｂは、共にｚ負方向側に突出した曲面であり、ｙ方向の両側から中央にかけて徐々に突出し、ｙ方向の中央が最もｚ負方向側に突出する曲面である。第１支持面１１２ｂは、この傾斜状の主面１１１ｂの基端側に設けられ、第２支持面１１３ｂは第１支持面１１２ｂより先端側に設けられる。第１支持面１１２ｂの頭頂部は、第２支持面１１３ｂの頭頂部よりｚ負方向側に突出している。 Similarly, the first support surface 112b and the second support surface 113b are also provided on the main surface 111b of the convex portion 111 on the negative z side. Both the first support surface 112b and the second support surface 113b are curved surfaces projecting in the z negative direction side, and gradually project from both sides in the y direction toward the center, and the center in the y direction projects the most in the z negative direction side. Is. The first support surface 112b is provided on the base end side of the inclined main surface 111b, and the second support surface 113b is provided on the tip end side of the first support surface 112b. The crown of the first support surface 112b projects in the negative z direction from the crown of the second support surface 113b.

一方、取替部材１２０の凹部１２１には、第１曲面１２２ａ，１２２ｂと、第２曲面１２３ａ，１２３ｂとが設けられる。第１曲面１２２ａ，１２２ｂと、第２曲面１２３ａ，１２３ｂは、凸部１１１が凹部１２１に嵌合するときにそれぞれ第１支持面１１２ａ，１１２ｂ、第２支持面１１３ａ，１１３ｂと対向する位置に設けられる。これにより、取替部材１２０が支持部材１１０に嵌合する状態では、図４、図５に示すように、第１支持面１１２ａ，１１２ｂがそれぞれ第１曲面１２２ａ，１２２ｂと嵌合し、第２支持面１１３ａ，１１３ｂがそれぞれ第２曲面１２３ａ，１２３ｂと嵌合した状態で、凸部１１１が凹部１２１に挿入されている。これにより、取替部材１２０が支持部材１１０に取り付けられたときに、支持部材１１０に対して取替部材１２０のｙ方向のガタが抑制される。 On the other hand, the recess 121 of the replacement member 120 is provided with first curved surfaces 122a and 122b and second curved surfaces 123a and 123b. The first curved surfaces 122a and 122b and the second curved surfaces 123a and 123b are provided at positions facing the first supporting surfaces 112a and 112b and the second supporting surfaces 113a and 113b, respectively, when the convex portion 111 fits into the concave portion 121. To be As a result, when the replacement member 120 is fitted to the support member 110, the first support surfaces 112a and 112b are fitted to the first curved surfaces 122a and 122b, respectively, as shown in FIGS. The convex portion 111 is inserted into the concave portion 121 in a state where the support surfaces 113a and 113b are fitted to the second curved surfaces 123a and 123b, respectively. Accordingly, when the replacement member 120 is attached to the support member 110, the play of the replacement member 120 in the y direction is suppressed with respect to the support member 110.

また、図１、図２に示すように、取替部材１２０の基端側の端面には、ｘ負方向側に突出する一対の耳部１２４が設けられている。一方、支持部材１１０には、取替部材１２０が支持部材１１０に嵌合する状態のときにこの耳部１２４が嵌合する一対の凹状部１１４が設けられている。耳部１２４と凹状部１１４は、それぞれ取替部材１２０及び支持部材１１０のｙ方向の両端に設けられる。これにより、取替部材１２０が支持部材１１０に取り付けられたときに、支持部材１１０に対して取替部材１２０のｚ方向のガタが抑制される。 In addition, as shown in FIGS. 1 and 2, a pair of ears 124 protruding in the negative x direction are provided on the end face of the replacement member 120 on the base end side. On the other hand, the support member 110 is provided with a pair of concave portions 114 into which the ears 124 fit when the replacement member 120 is fitted into the support member 110. The ear portion 124 and the concave portion 114 are provided at both ends of the replacement member 120 and the support member 110 in the y direction, respectively. Thereby, when the replacement member 120 is attached to the support member 110, the play of the replacement member 120 in the z direction is suppressed with respect to the support member 110.

図２に示すように、ロックピン１３０は、ｙ正方向側から取替部材１２０及び支持部材１１０に取り付けられる。支持部材１１０のｙ正方向側の側面には、ロックピン１３０が嵌合するための溝１１５が設けられる。取替部材１２０には、ロックピン１３０を内側の支持部材１１０の溝１１５まで誘導するための孔１２５が設けられる。 As shown in FIG. 2, the lock pin 130 is attached to the replacement member 120 and the support member 110 from the positive y direction side. A groove 115 for fitting the lock pin 130 is provided on the side surface of the support member 110 on the positive y side. The replacement member 120 is provided with a hole 125 for guiding the lock pin 130 to the groove 115 of the inner support member 110.

孔１２５は、取替部材１２０が支持部材１１０に嵌合した状態において、溝１１５の一部が露出するよう配置される。支持部材１１０に取替部材１２０が組み付けられたときに、溝１１５と孔１２５とは、取替部材１２０の側面に開口する内部空間Ａ（図７参照）を形成する。この内部空間Ａはロックピン１３０と略同形状であり、ロックピン１３０は、この内部空間Ａに嵌入されることで、取替部材１２０と支持部材１１０とを連結固定する。 The hole 125 is arranged so that a part of the groove 115 is exposed when the replacement member 120 is fitted in the support member 110. When the replacement member 120 is assembled to the support member 110, the groove 115 and the hole 125 form an internal space A (see FIG. 7) that opens to the side surface of the replacement member 120. The internal space A has substantially the same shape as the lock pin 130, and the lock pin 130 is fitted into the internal space A to connect and fix the replacement member 120 and the support member 110.

なお、図４に示すように、取替部材１２０の孔１２５がｙ正方向側に設けられるのに対して、支持部材１１０の溝１１５はｙ正方向側の他に、ｙ負方向側にも設けてもよい。これにより、取替部材１２０の方向をｘ軸まわりに１８０°回転させて支持部材１１０に嵌合した状態でも、ロックピン１３０により取替部材１２０を支持部材１１０に固定できる。取替部材１２０は、バケットに取り付けた状態では、ｚ正方向側またはｚ負方向側の主面１２０ａ、１２０ｂのいずれか一方が主に掘削面となり摩耗が進みやすい。そこで図４のように支持部材１１０のｙ方向両側に溝１１５を一対設けることにより、取替部材１２０をローテーションでき、すなわち、取替部材１２０の方向をｘ軸まわりに１８０°回転させて掘削面となる主面を入れ替えることができるので、取替部材１２０を長寿命化できる。 As shown in FIG. 4, while the hole 125 of the replacement member 120 is provided on the y positive direction side, the groove 115 of the support member 110 is provided on the y negative direction side as well as the y positive direction side. It may be provided. Accordingly, even when the direction of the replacement member 120 is rotated by 180° around the x-axis and fitted into the support member 110, the replacement member 120 can be fixed to the support member 110 by the lock pin 130. When the replacement member 120 is attached to a bucket, one of the main surfaces 120a and 120b on the z positive direction side or the z negative direction side mainly serves as an excavation surface, and wear easily proceeds. Therefore, as shown in FIG. 4, by providing a pair of grooves 115 on both sides of the support member 110 in the y direction, the replacement member 120 can be rotated, that is, the direction of the replacement member 120 is rotated by 180° around the x axis and the excavation surface is rotated. Since the main surface to be replaced can be replaced, the life of the replacement member 120 can be extended.

ここで、溝１１５は、支持部材１１０のｙ方向の側面に設けられるが、この側面とは、支持部材１１０の延在方向（ｘ方向）と直交し、かつ、図１４に示すように、支持部材１１０の凸部１１１の一対の主面１１１ａ、１１１ｂの対向方向（ｚ方向）と直交する側方の位置にある面である。同様に、孔１２５は、取替部材１２０のｙ方向の側面に設けられるが、この側面とは、取替部材１２０の延在方向（ｘ方向）と直交し、かつ、図１４に示すように、取替部材１２０の一対の主面１２０ａ、１２０ｂの対向方向（ｚ方向）と直交する側方の位置にある面である。なお、溝１１５及び孔１２５が設けられる側方の位置は、必ずしも支持部材１１０及び取替部材１２０の延在方向（ｘ方向）と直交しなくてもよく、少なくとも交差して延在方向と異なる方向であればよい。 Here, the groove 115 is provided on the side surface in the y direction of the support member 110, and this side surface is orthogonal to the extending direction (x direction) of the support member 110, and as shown in FIG. It is a surface at a side position orthogonal to the facing direction (z direction) of the pair of main surfaces 111a and 111b of the convex portion 111 of the member 110. Similarly, the hole 125 is provided on the side surface of the replacement member 120 in the y direction, and this side surface is orthogonal to the extending direction (x direction) of the replacement member 120, and as shown in FIG. The pair of main surfaces 120a and 120b of the replacement member 120 are lateral surfaces that are orthogonal to the facing direction (z direction). The lateral positions where the groove 115 and the hole 125 are provided do not necessarily need to be orthogonal to the extending direction (x direction) of the support member 110 and the replacement member 120, and at least intersect and differ from the extending direction. Any direction will do.

なお、本実施形態では、ｙ正方向側から単一のロックピン１３０で固定する構成を例示したが、例えばｙ方向両側から２つのロックピンで固定する構成でもよい。この場合、取替部材１２０のｙ負方向側にも孔１２５と同様の孔が設けられる。 In addition, in the present embodiment, the configuration in which the single lock pin 130 is used for fixing from the positive side in the y direction is illustrated, but the configuration may be such that two lock pins are provided from both sides in the y direction. In this case, a hole similar to the hole 125 is provided on the y negative direction side of the replacement member 120.

図２に加えて図６を参照して、実施形態に係るロックピン１３０の構成を説明する。図６は、ロックピン１３０の斜視図である。 The configuration of the lock pin 130 according to the embodiment will be described with reference to FIG. 6 in addition to FIG. 2. FIG. 6 is a perspective view of the lock pin 130.

図２、図６に示すように、ロックピン１３０は、基端部１３１と、先端部１３２とを有する。 As shown in FIGS. 2 and 6, the lock pin 130 has a base end portion 131 and a tip end portion 132.

基端部１３１は、例えばＪＩＳ規格に規定される機械構造用炭素鋼、機械構造用合金鋼（たとえばＳ４５Ｃ、ＳＣＭ４３５のほか、同等量の炭素を含むＳＭｎ鋼、ＳＣｒ鋼、ＳＣＭ鋼、ＳＮＣＭ鋼など）、工具鋼、鋳鋼などの金属製である。先端部１３２は例えば硬質ゴムなどの弾性材料で形成され、基端部１３１の一端側（ｘ正方向側）に連続的に形成される。基端部１３１と先端部１３２は、溝１１５と孔１２５とにより形成される一方向に延びる内部空間Ａに嵌入可能な形状であり、長手方向を有するよう一体的に形成される。基端部１３１と先端部１３２との配列方向がロックピン１３０の長手方向である。 The base end portion 131 is, for example, carbon steel for machine structure defined by JIS standard, alloy steel for machine structure (for example, S45C, SCM435, SMn steel containing the same amount of carbon, SCr steel, SCM steel, SNCM steel, etc.). ), tool steel, cast steel and other metals. The tip portion 132 is formed of an elastic material such as hard rubber, and is continuously formed on one end side (x positive direction side) of the base end portion 131. The base end portion 131 and the tip end portion 132 have a shape that can be fitted into an inner space A formed by the groove 115 and the hole 125 and extending in one direction, and are integrally formed so as to have a longitudinal direction. The arrangement direction of the base end portion 131 and the tip end portion 132 is the longitudinal direction of the lock pin 130.

なお、先端部１３２を形成する弾性材料は、ショア硬さが４０〜９０程度のものが好ましく、ショア硬さが８０程度のものがより好ましい。 The elastic material forming the tip portion 132 preferably has a Shore hardness of about 40 to 90, more preferably about 80.

先端部１３２のうち基端部１３１と反対側の端部には、略円弧状の凸曲面１３２ａが形成されている。ロックピン１３０は短手方向（ｙ方向）に対向する底面１３３と上面１３４とを有する。底面１３３はｙ負方向側に面し、内部空間Ａへの装着時に溝１１５の底面１１５ｂと対向する。上面１３４はｙ正方向側に面する。凸曲面１３２ａは、底面１３３から連続的に形成され、かつ、上面１３４に対してｙ方向に突出する。 A substantially arc-shaped convex curved surface 132a is formed at an end of the tip end 132 opposite to the base end 131. The lock pin 130 has a bottom surface 133 and a top surface 134 that are opposed to each other in the lateral direction (y direction). The bottom surface 133 faces the y negative direction side and faces the bottom surface 115b of the groove 115 when mounted in the internal space A. The upper surface 134 faces the positive y-direction side. The convex curved surface 132a is continuously formed from the bottom surface 133 and projects in the y direction with respect to the upper surface 134.

基端部１３１のうち先端部１３２と反対側の端部には、階段状に形成された段差面１３１ａが形成されている。段差面１３１ａは、ロックピン１３０の底面１３３に近いほどｘ負方向側に突出する量が大きくなるよう形成されている。 At the end of the base end 131 opposite to the tip 132, a stepped surface 131a is formed stepwise. The step surface 131a is formed such that the closer it is to the bottom surface 133 of the lock pin 130, the larger the amount of projection in the negative x direction.

図７〜図９を参照して、ロックピン１３０による取替部材１２０の支持部材１１０への固定構造を説明する。図７は、ロックピン１３０の取り付け手順（ロック方法）の第１段階（解放状態）を示す図である。図８は、ロックピン１３０の取り付け手順の第２段階（中間状態）を示す図である。図９は、ロックピン１３０の取り付け手順の第３段階（固定状態）を示す図である。図７〜図９では、ツース１００のｘ−ｙ平面に沿った断面図が、ロックピン１３０の取り付け部分を拡大視して図示されている。 A structure for fixing the replacement member 120 to the support member 110 by the lock pin 130 will be described with reference to FIGS. 7 to 9. FIG. 7 is a diagram showing a first stage (released state) of the attachment procedure (locking method) of the lock pin 130. FIG. 8 is a diagram showing a second stage (intermediate state) of the procedure for attaching the lock pin 130. FIG. 9 is a diagram showing a third stage (fixed state) of the procedure for attaching the lock pin 130. 7 to 9, a cross-sectional view of the tooth 100 taken along the xy plane is shown by enlarging a mounting portion of the lock pin 130.

図７に示すように、支持部材１１０に取替部材１２０が組み付けられたときに、溝１１５と孔１２５とは、取替部材１２０の側面に開口する内部空間Ａを形成する。この内部空間Ａは、孔１２５から支持部材の先端側（ｘ正方向）へロックピン１３０を挿入し、ロックピン１３０の先端部１３２が最奥部（凹曲面１１５ａ）に突き当たった状態で、先端部１３２を長手方向に押圧して弾性圧縮しつつ、ロックピン１３０の先端部１３２を中心としてロックピン１３０を溝１１５の方向に回動させることによって、ロックピン１３０が嵌入されるよう形成される。つまり、内部空間Ａの最深部がピボット軸受のように機能して、ロックピン１３０はピボットのように機能する。 As shown in FIG. 7, when the replacement member 120 is assembled to the support member 110, the groove 115 and the hole 125 form an internal space A that opens to the side surface of the replacement member 120. In this internal space A, the lock pin 130 is inserted from the hole 125 to the tip end side (x positive direction) of the support member, and the tip end 132 of the lock pin 130 abuts the innermost portion (concave curved surface 115a), and the tip end The lock pin 130 is formed to be fitted by rotating the lock pin 130 in the direction of the groove 115 about the tip 132 of the lock pin 130 while pressing the part 132 in the longitudinal direction to elastically compress. .. That is, the deepest part of the internal space A functions like a pivot bearing, and the lock pin 130 functions like a pivot.

このような内部空間Ａを形成するために、溝１１５は、ｘ正方向側（ツース１００の先端側）になるほど深さが増すように、底面１１５ｂが傾斜状となるよう形成されている。溝１１５のｘ正方向側の端部は、ｚ軸と平行な中心軸Ｃを中心とする略円弧状に形成される凹曲面１１５ａである。溝１１５の平面状の底面１１５ｂは、溝１１５のｘ負方向側端部から傾斜して凹曲面１１５ａと連続的に接続されている。 In order to form such an internal space A, the groove 115 is formed such that the bottom surface 115b is inclined so that the depth increases toward the x positive direction side (the tip side of the tooth 100). An end portion of the groove 115 on the positive x direction side is a concave curved surface 115a formed in a substantially arc shape centered on a central axis C parallel to the z axis. The planar bottom surface 115b of the groove 115 is inclined from the x negative direction side end of the groove 115 and is continuously connected to the concave curved surface 115a.

溝１１５の凹曲面１１５ａは、ロックピン１３０の先端部１３２の凸曲面１３２ａと略同一の曲率半径で形成されており、ロックピン１３０の凸曲面１３２ａが突き当たって嵌合した状態で、中心軸Ｃを回動中心としてロックピン１３０を回動可能となっている。つまり、溝１１５の凹曲面１１５ａは、ロックピン１３０の先端部１３２の凸曲面１３２ａを受ける軸受として機能する。 The concave curved surface 115a of the groove 115 is formed with substantially the same radius of curvature as the convex curved surface 132a of the tip portion 132 of the lock pin 130, and when the convex curved surface 132a of the lock pin 130 abuts and is fitted, the central axis C The lock pin 130 can be rotated about the rotation center. That is, the concave curved surface 115 a of the groove 115 functions as a bearing that receives the convex curved surface 132 a of the tip portion 132 of the lock pin 130.

溝１１５の底面１１５ｂは、ロックピン１３０の底面１３３が密着できるように、底面１３３とほぼ同じ寸法で形成されている。これにより、ロックピン１３０が溝１１５の底面１１５ｂの全域を塞ぐことができる。 The bottom surface 115b of the groove 115 is formed to have substantially the same size as the bottom surface 133 so that the bottom surface 133 of the lock pin 130 can be in close contact. As a result, the lock pin 130 can close the entire area of the bottom surface 115b of the groove 115.

ロックピン１３０の取り付け手順の第１段階（解放状態）では、図７に示すように、ロックピン１３０の先端部１３２が孔１２５から支持部材１１０の先端側に挿入され、ロックピン１３０の先端部１３２の凸曲面１３２ａが溝１１５の凹曲面１１５ａに突き当たる。 In the first stage (released state) of the procedure for attaching the lock pin 130, as shown in FIG. 7, the tip portion 132 of the lock pin 130 is inserted from the hole 125 to the tip side of the support member 110, and the tip portion of the lock pin 130 is inserted. The convex curved surface 132 a of 132 abuts on the concave curved surface 115 a of the groove 115.

次に、基端部１３１を溝１１５の方向に押し込むと、先端部１３２の凸曲面１３２ａが溝１１５の凹曲面１１５ａに沿って中心軸Ｃを中心として（図７では反時計回り）に回動するので、ロックピン１３０の基端部１３１は中心軸Ｃを回動中心として回動しながら、孔１２５に進入していく。 Next, when the base end portion 131 is pushed in the direction of the groove 115, the convex curved surface 132a of the distal end portion 132 rotates around the central axis C along the concave curved surface 115a of the groove 115 (counterclockwise in FIG. 7). Therefore, the base end portion 131 of the lock pin 130 enters the hole 125 while rotating around the center axis C as the rotation center.

なお、孔１２５のｘ負方向側の内周面１２６は、基端部１３１の段差面１３１ａと嵌合するよう段差状に形成されており、段差面１３１ａとは反対に、孔１２５の外側（ｙ正方向側）に近いほどｘ正方向側に突出する量が大きくなるよう形成されている。このため、ロックピン１３０は通常時の長手方向の寸法では段差面１３１ａが孔１２５の内周面１２６に引っかかってそれ以上基端部１３１が孔１２５に進入できない。ここで、先端部１３２は弾性材料で形成されているため、基端部１３１側から先端部１３２側へ押圧することで、ロックピン１３０の長手方向寸法を収縮させて、これにより基端部１３１を孔１２５に進入させることができる。 The inner peripheral surface 126 of the hole 125 on the x negative direction side is formed in a stepped shape so as to fit with the stepped surface 131a of the base end portion 131, and the outer side of the hole 125 ( It is formed such that the closer it is to the (y positive direction side), the greater the amount of protrusion to the x positive direction side. Therefore, in the normal dimension of the lock pin 130 in the longitudinal direction, the step surface 131 a is caught by the inner peripheral surface 126 of the hole 125, and the base end portion 131 cannot further enter the hole 125. Here, since the distal end portion 132 is formed of an elastic material, by pressing from the proximal end portion 131 side toward the distal end portion 132 side, the longitudinal dimension of the lock pin 130 is contracted, whereby the proximal end portion 131. Can enter hole 125.

図８に示すロックピン１３０の取り付け手順の第２段階（中間状態）では、ロックピン１３０の基端部１３１が途中まで孔１２５に進入している状態である。このとき、基端部１３１の段差面１３１ａは、孔１２５のｘ負方向側の内周面１２６の段差形状とその一部が嵌合している。 In the second stage (intermediate state) of the procedure for attaching the lock pin 130 shown in FIG. 8, the base end portion 131 of the lock pin 130 is partly inserted into the hole 125. At this time, the stepped surface 131 a of the base end portion 131 is fitted with the stepped shape of the inner peripheral surface 126 of the hole 125 on the x negative direction side and a part thereof.

図８の中間状態から引き続き基端部１３１側から先端部１３２側へ押圧しつつ、基端部１３１を溝１１５の方向に押し込んで回動させる。これにより、最終的に、図９に示すロックピン１３０の取り付け手順の第３段階（固定状態）のように、ロックピン１３０の底面部１３３が溝１１５の底面１１５ｂと当接する位置まで回動して、ロックピン１３０が内部空間Ａに嵌入される。このとき、基端部１３１の段差面１３１ａは、孔１２５のｘ負方向側の内周面１２６の段差形状とその全体が嵌合する。これにより、ロックピン１３０が内部空間Ａと隙間なく嵌合し、溝１１５と孔１２５とを塞いだ状態となる。 From the intermediate state of FIG. 8, the base end 131 is pushed in the direction of the groove 115 and rotated while being continuously pressed from the base end 131 side to the tip end 132 side. As a result, finally, as in the third stage (fixed state) of the attachment procedure of the lock pin 130 shown in FIG. 9, the bottom surface portion 133 of the lock pin 130 is rotated to a position where it abuts the bottom surface 115b of the groove 115. Then, the lock pin 130 is fitted into the internal space A. At this time, the step surface 131a of the base end portion 131 fits the step shape of the inner peripheral surface 126 of the hole 125 on the x negative direction side in its entirety. As a result, the lock pin 130 is fitted into the internal space A without any gap, and the groove 115 and the hole 125 are closed.

このとき、ロックピン１３０は、先端部１３２が長手方向に弾性圧縮した状態で内部空間Ａに嵌入された後に先端部１３２が弾性復帰してロックピン１３０の全長が伸びる。これにより、先端部１３２が支持部材１１０の溝１１５の壁面（凹曲面１１５ａ）をｘ正方向に押圧し、基端部１３１が、取替部材１２９の孔１２５の内周面１２６をｘ負方向側に押圧する状態となる。すなわち、ロックピン１３０によって、取替部材１２０が基端側に押圧された状態となり、取替部材１２０が支持部材１１０に対して先端側に抜けないように固定された状態となる。 At this time, the lock pin 130 is inserted into the internal space A in a state where the tip end portion 132 is elastically compressed in the longitudinal direction, and then the tip end portion 132 elastically returns to extend the entire length of the lock pin 130. As a result, the distal end portion 132 presses the wall surface (concave curved surface 115a) of the groove 115 of the support member 110 in the positive x direction, and the proximal end portion 131 causes the inner peripheral surface 126 of the hole 125 of the replacement member 129 to move in the negative x direction. It is in a state of being pressed to the side. That is, the replacement member 120 is pressed toward the base end side by the lock pin 130, and the replacement member 120 is fixed to the support member 110 so as not to come off toward the distal end side.

図９の固定状態からロックピン１３０を取り外す手順は以下のとおりである。まず図９の固定状態から基端部１３１の段差面１３１ａに先端部１３２の方向へ外力を加える。外力の付加は、作業員の手で行っても良いし、器具を用いてもよい。先端部１３２がこの外力によって収縮して、段差面１３１ａと孔１２５の内周面１２６との間に隙間ができ、基端部１３１を孔１２５から外側へ取り出すようにロックピンを回動可能となる。図８の中間状態のようにロックピン１３０を時計回りに回動させて、基端部１３１を孔１２５から取り外し、図７の解放状態まで遷移させる。次いで、図７の開放状態からロックピン１３０を段差面１３１ａ側に引っ張って、先端部１３２を溝１１５及び孔１２５から抜き出し、ロックピン１３０が内部空間Ａから取り外される。 The procedure for removing the lock pin 130 from the fixed state of FIG. 9 is as follows. First, an external force is applied to the step surface 131a of the base end portion 131 in the direction of the tip end portion 132 from the fixed state of FIG. The external force may be applied by a worker's hand, or an instrument may be used. The distal end portion 132 contracts due to this external force to form a gap between the step surface 131a and the inner peripheral surface 126 of the hole 125, and the lock pin can be rotated so that the proximal end portion 131 is taken out from the hole 125 to the outside. Become. As in the intermediate state of FIG. 8, the lock pin 130 is rotated clockwise to remove the base end portion 131 from the hole 125, and transition to the released state of FIG. Then, the lock pin 130 is pulled toward the step surface 131a from the open state of FIG. 7, the tip end portion 132 is pulled out from the groove 115 and the hole 125, and the lock pin 130 is removed from the internal space A.

本実施形態の作用、効果を説明する。本実施形態のロックピン１３０は金属製の基端部１３１と、基端部１３１の一端側に形成された弾性材料の先端部１３２と、を備える。 The operation and effect of this embodiment will be described. The lock pin 130 of the present embodiment includes a metal base end portion 131 and a distal end portion 132 of an elastic material formed on one end side of the base end portion 131.

この構成により、ロックピン１３０は、金属製の基端部１３１と弾性材料の先端部１３２との二層構造という簡易な構造となるので、ロックピン１３０の製造容易性を向上できる。 With this configuration, the lock pin 130 has a simple structure of a two-layer structure including the metal base end portion 131 and the elastic material tip end portion 132, so that the manufacturability of the lock pin 130 can be improved.

また、本実施形態のロックピン１３０では、基端部１３１は短手方向に対向する底面１３３と上面１３４とを有し、ロックピン１３０の先端部１３２は、底面１３３から連続的に形成され、かつ、上面１３４より短手方向に突出する略円弧状の凸曲面１３２ａを有する。つまり、凸曲面１３２ａと上面１３４との間は段差がついている。 Further, in the lock pin 130 of the present embodiment, the base end portion 131 has a bottom surface 133 and a top surface 134 that are opposed to each other in the lateral direction, and the tip end portion 132 of the lock pin 130 is formed continuously from the bottom surface 133. In addition, it has a substantially arcuate convex curved surface 132a that projects in the lateral direction from the upper surface 134. That is, there is a step between the convex curved surface 132a and the upper surface 134.

この構成により、上面１３４と底面１３３との間を連続的に接続するように凸曲面をつくった場合と比べて凸曲面１３２ａの曲率半径を大きくでき、凸曲面１３２ａの周方向の長さを増やせる。これにより、ロックピン１３０の先端を溝１１５の凹曲面１１５ａに突き当てて回動させるときに、凸曲面１３２ａと溝１１５の凹曲面１１５ａとの接触面積を増やすことができ、ロックピン１３０を適切に回動方向に誘導でき、より安定した回動操作が可能となる。また、上面１３４が凸曲面１３２ａの端部（突出部分１３５）よりも底面１３３側に凹んでいるので、図９に示すように、ロックピン１３０が内部空間Ａに嵌合したときに溝１１５の深さを抑えつつ、基端部１３１が孔１２５より外側に突出するのを防止できる。また、図９に示すように、ロックピン１３０が内部空間Ａに嵌合した状態では、上面１３４に対する凸曲面１３２ａの突出部分１３５が孔１２５と溝１１５との隙間を塞ぐので、外部からの異物の進入を防止できる。 With this configuration, the radius of curvature of the convex curved surface 132a can be increased and the circumferential length of the convex curved surface 132a can be increased as compared with the case where the convex curved surface is formed so as to continuously connect the upper surface 134 and the bottom surface 133. .. This makes it possible to increase the contact area between the convex curved surface 132a and the concave curved surface 115a of the groove 115 when the tip end of the lock pin 130 is brought into contact with the concave curved surface 115a of the groove 115 to rotate, and the lock pin 130 is properly adjusted. Can be guided in the rotation direction, and more stable rotation operation becomes possible. Further, since the upper surface 134 is recessed toward the bottom surface 133 side with respect to the end portion (protruding portion 135) of the convex curved surface 132a, as shown in FIG. 9, when the lock pin 130 is fitted in the internal space A, the groove 115 of the groove 115 is formed. It is possible to prevent the base end portion 131 from projecting outward from the hole 125 while suppressing the depth. Further, as shown in FIG. 9, when the lock pin 130 is fitted in the internal space A, the protruding portion 135 of the convex curved surface 132a with respect to the upper surface 134 closes the gap between the hole 125 and the groove 115, and thus foreign matter from the outside. Can be prevented from entering.

また、本実施形態のロックピン１３０において、基端部１３１は、先端部１３２とは反対側の他端に階段状に形成された段差面１３１ａを有する。この構成により、ロックピン１３０を内部空間Ａに嵌合したときにロックピン１３０を孔１２５の内周面１２６に係止でき、ロックピン１３０の孔１２５からの抜けを抑制でき、より安定してロックピン１３０を内部空間Ａへ嵌合した状態を維持できる。 Further, in the lock pin 130 of the present embodiment, the base end portion 131 has a stepped surface 131a formed in a step shape at the other end opposite to the tip end portion 132. With this configuration, when the lock pin 130 is fitted into the internal space A, the lock pin 130 can be locked to the inner peripheral surface 126 of the hole 125, the lock pin 130 can be prevented from coming off the hole 125, and more stable. The state in which the lock pin 130 is fitted in the internal space A can be maintained.

また、本実施形態のロックピン１３０において、先端部１３２の長手方向の寸法は、ロックピン１３０全体の寸法の３０〜６０％程度が好ましい。弾性材料の先端部１３２の寸法が長すぎると、外力に対して脆くなってロックピン１３０の耐久性に問題が生じる場合がある。また、先端部１３２の寸法が短すぎると、外力に対して弾性変形しにくくなってロックピン１３０の内部空間Ａへの嵌入が困難になる場合があるためである。 Further, in the lock pin 130 of the present embodiment, the lengthwise dimension of the tip portion 132 is preferably about 30 to 60% of the size of the entire lock pin 130. If the tip portion 132 of the elastic material is too long, it may become brittle against external force and cause a problem in durability of the lock pin 130. Further, if the size of the tip portion 132 is too short, it may be difficult to elastically deform with respect to an external force and it may be difficult to fit the lock pin 130 into the internal space A.

また、このロックピン１３０を用いるツース１００のロック構造は、ショベルのバケットに設けられる支持部材１１０と、支持部材１１０に脱着可能に取り付けられる取替部材１２０と、支持部材１１０と取替部材１２０とを連結固定するロックピン１３０と、を備え、ロックピン１３０は、金属製の基端部１３１と、ロックピン１３０の長手方向に沿って基端部１３１の一端側に形成された弾性材料の先端部１３２と、を備える。ロックピン１３０は、支持部材１１０と取替部材１２０とに取り付けられた状態で、長手方向が取替部材１２０の脱着方向に沿って配置され、取替部材１２０を支持部材１１０の方向へ押圧する力を発生する。 Further, the lock structure of the tooth 100 using the lock pin 130 includes a support member 110 provided on a bucket of a shovel, a replacement member 120 detachably attached to the support member 110, a support member 110 and a replacement member 120. A lock pin 130 for connecting and fixing the lock pin 130. The lock pin 130 includes a metal base end portion 131 and a tip of an elastic material formed on one end side of the base end portion 131 along the longitudinal direction of the lock pin 130. And a part 132. The lock pin 130 is attached to the support member 110 and the replacement member 120, and the longitudinal direction thereof is arranged along the attachment/detachment direction of the replacement member 120, and presses the replacement member 120 toward the support member 110. Generate force.

特許文献１に記載される三層構造のロック部材は、ロック部材の挿入方向が、取替部材１２０の脱着方向と直交する方向（ｙ方向またはｚ方向）であり、三層構造の積層方向もこの方向となる。ツース１００の使用時に取替部材１２０が掘削物から受ける力は、取替部材１２０の先端が受け基端側に伝達される。このため、特許文献１のロック部材は、三層構造の境界面にせん断力が作用しやすくなるため、ロック部材の劣化が早まる虞がある。 In the lock member having the three-layer structure described in Patent Document 1, the insertion direction of the lock member is a direction (y direction or z direction) orthogonal to the attachment/detachment direction of the replacement member 120, and the stacking direction of the three-layer structure is also the same. This is the direction. The force received by the replacement member 120 from the excavated object when the tooth 100 is used is transmitted to the receiving base end side of the replacement member 120. Therefore, in the lock member of Patent Document 1, a shearing force is likely to act on the boundary surface of the three-layer structure, which may accelerate deterioration of the lock member.

これに対して本実施形態のロック構造では、ロックピン１３０の長手方向が取替部材１２０の脱着方向に沿う状態で嵌合されているので、ロックピン１３０は長手方向の圧縮力が作用し、取替部材１２０に基端側への力を伝達する。つまり、ロックピン１３０は短手方向の外力（せん断力）が基端部１３１と先端部１３２との境界面に作用しにくいので、ロックピン１３０の耐久性を向上できる。また、ロックピン１３０が取替部材１２０を支持部材１１０の方向へ押圧するので、取替部材１２０を支持部材１１０に確実に固定できる。 On the other hand, in the lock structure of the present embodiment, since the longitudinal direction of the lock pin 130 is fitted in a state of being along the detaching direction of the replacement member 120, the lock pin 130 is subjected to a compressive force in the longitudinal direction, The force to the proximal side is transmitted to the replacement member 120. That is, since the external force (shearing force) in the lateral direction of the lock pin 130 hardly acts on the boundary surface between the base end portion 131 and the tip end portion 132, the durability of the lock pin 130 can be improved. Further, since the lock pin 130 presses the replacement member 120 toward the support member 110, the replacement member 120 can be securely fixed to the support member 110.

また、本実施形態のツース１００は、ショベルのバケットに設けられる支持部材１１０と、支持部材１１０の先端の凸部１１１が挿入される凹部１１２が基端に設けられ、所定方向（ｘ方向）に突出して延在する取替部材１２０と、取替部材１２０の延在方向と交差する側方（ｙ方向）の位置にて支持部材１１０に設けられる溝１１５と、側方の位置にて取替部材１２０に設けられ、取替部材１２０が支持部材１１０に嵌合した状態において溝１１５の一部が露出するよう配置される孔１２５と、孔１２５及び溝１１５により形成される内部空間Ａに嵌入され、取替部材１２０と支持部材１１０とを連結固定する、上記のロックピン１３０と、を備える。ロックピン１３０は、内部空間Ａに嵌入された状態では、その長手方向が取替部材１２０の延在方向に沿って配置され、支持部材１１０の溝１１５を長手方向の一方側（先端側）に押圧し、取替部材１２０の孔１２５の内周面１２６を長手方向の他方側（基端側）に押圧する。 Further, the tooth 100 of the present embodiment is provided with the support member 110 provided in the bucket of the shovel and the concave portion 112 into which the convex portion 111 of the tip of the support member 110 is inserted at the proximal end, and the tooth 100 in the predetermined direction (x direction). The replacement member 120 that projects and extends, the groove 115 that is provided in the support member 110 at a side position (y direction) that intersects the extension direction of the replacement member 120, and the replacement member at the side position. A hole 125 provided in the member 120 and arranged so that a part of the groove 115 is exposed when the replacement member 120 is fitted to the support member 110, and the hole 125 and the internal space A formed by the groove 115. And the lock pin 130 for connecting and fixing the replacement member 120 and the support member 110. When the lock pin 130 is fitted in the internal space A, the longitudinal direction of the lock pin 130 is arranged along the extending direction of the replacement member 120, and the groove 115 of the support member 110 is arranged on one side (the tip side) of the longitudinal direction. The inner peripheral surface 126 of the hole 125 of the replacement member 120 is pressed to the other side (base end side) in the longitudinal direction.

この構成により、ロックピン１３０の長手方向が取替部材１２０の脱着方向に沿う状態でロックピン１３０が内部空間Ａに嵌合されて、取替部材１２０と支持部材１１０とを連結固定するので、取替部材１２０が支持部材１１０に対して先端側に抜けるのをより強固に抑制できる。 With this configuration, the lock pin 130 is fitted into the internal space A with the longitudinal direction of the lock pin 130 along the attachment/detachment direction of the replacement member 120, and the replacement member 120 and the support member 110 are connected and fixed. It is possible to more firmly prevent the replacement member 120 from coming off to the tip side with respect to the support member 110.

また、本実施形態のツース１００では、孔１２５及び溝１１５により形成される内部空間Ａは、孔１２５から支持部材１１０の先端側へロックピン１３０を挿入し、ロックピン１３０の先端部１３２が最奥部に突き当たった状態で、先端部１３２を長手方向に押圧して弾性圧縮しつつ、先端部１３２を中心としてロックピン１３０を溝１１５の方向に回動させることによって、ロックピン１３０が嵌入されるよう形成される。 Further, in the tooth 100 of the present embodiment, the internal space A formed by the hole 125 and the groove 115 is such that the lock pin 130 is inserted from the hole 125 to the distal end side of the support member 110, and the distal end portion 132 of the lock pin 130 is the maximum. With the tip 132 pressed in the longitudinal direction and elastically compressed, the lock pin 130 is rotated in the direction of the groove 115 around the tip 132 while the tip 132 is pressed against the back, so that the lock pin 130 is fitted. Is formed.

この構成により、ロックピン１３０は内部空間Ａの最奥まで挿入して突き当て、その後に溝１１５側に倒して内部空間Ａに嵌合されるので、ロックピン１３０は支持部材１１０の先端側の一方向にしか挿入できず、逆方向に挿入するなどの入れ間違いなど、ロックピン１３０の誤取付を防止できる。また、摩耗や劣化が早い弾性材料で形成される先端部１３２が内部空間Ａの最奥に配置され、ロックピン１３０の外部に露出する部分は金属製の基端部１３１となるので、ロックピン１３０の劣化も抑制できる。 With this configuration, the lock pin 130 is inserted into the deepest part of the internal space A, but abuts against the groove 115, and then is tilted toward the groove 115 and fitted into the internal space A. The lock pin 130 can be inserted only in one direction, and it is possible to prevent the lock pin 130 from being erroneously attached due to a mistake such as insertion in the opposite direction. Further, since the tip end portion 132 formed of an elastic material that is quickly worn and deteriorated is disposed at the innermost part of the internal space A, and the portion exposed to the outside of the lock pin 130 becomes the metal base end portion 131, the lock pin is formed. The deterioration of 130 can also be suppressed.

また、本実施形態のツース１００では、ロックピン１３０は、溝１１５の底面１１５ｂの全域を塞ぐ形状で形成される。これにより、ロックピン１３０と溝１１５や孔１２５との隙間に異物が進入することを防止できるので、進入した異物によってロックピン１３０が摩耗するのを防止できる。また、ロックピン１３０と内部空間Ａとの隙間に異物が入らないことによって、ロックピン１３０を内部空間Ａから取り外しやすくできる。 Further, in the tooth 100 of this embodiment, the lock pin 130 is formed in a shape that closes the entire bottom surface 115 b of the groove 115. As a result, foreign matter can be prevented from entering the gap between the lock pin 130 and the groove 115 or the hole 125, so that the lock pin 130 can be prevented from being worn by the foreign matter that has entered. Further, since no foreign matter enters the gap between the lock pin 130 and the internal space A, the lock pin 130 can be easily removed from the internal space A.

また、本実施形態のツース１００では、ロックピン１３０は、先端部１３２が孔１２５から外部に露出しないように内部空間Ａに嵌合される。これにより、変形しやすく摩耗しやすい弾性材料で形成される先端部１３２が、外部に露出しないように保護できるので、ロックピン１３０の劣化を抑制できる。 Further, in the tooth 100 of this embodiment, the lock pin 130 is fitted into the internal space A so that the tip portion 132 is not exposed to the outside from the hole 125. As a result, the tip portion 132 formed of an elastic material that is easily deformed and easily worn can be protected so as not to be exposed to the outside, and thus deterioration of the lock pin 130 can be suppressed.

また、本実施形態のツース１００では、ロックピン１３０は、先端部１３２が長手方向に弾性圧縮した状態で内部空間Ａに嵌入された後に、先端部１３２が弾性復帰してロックピン１３０の全長が伸びることによって、先端部１３２が支持部材１１０の溝１１５を長手方向の一方側（先端側）に押圧し、基端部１３１が、取替部材１２０の孔１２５の内周面１２６を長手方向の他方側（基端側）に押圧する。 Further, in the tooth 100 of the present embodiment, the lock pin 130 is fitted into the internal space A in a state in which the distal end portion 132 is elastically compressed in the longitudinal direction, and then the distal end portion 132 elastically returns so that the entire length of the lock pin 130. By the extension, the distal end portion 132 presses the groove 115 of the support member 110 to one side (the distal end side) in the longitudinal direction, and the proximal end portion 131 moves the inner peripheral surface 126 of the hole 125 of the replacement member 120 in the longitudinal direction. Press on the other side (base end side).

この構成により、ロックピン１３０を内部空間Ａ内でさらに溝１１５及び孔１２５との密着性を高めることができ、支持部材１１０の抜けと、内部空間Ａへの異物混入をさらに抑制できる。 With this configuration, the lock pin 130 can further improve the adhesiveness with the groove 115 and the hole 125 in the internal space A, and the detachment of the support member 110 and the entry of foreign matter into the internal space A can be further suppressed.

また、本実施形態のツース１００では、ロックピン１３０は、先端部１３２とは反対側の基端部１３１の他端に階段状に形成された段差面１３１ａを有し、孔１２５は、内周面のうちロックピン１３０の嵌合時に段差面１３１ａと対向する面１２６に段差面１３１ａと嵌合する段差形状が形成される。 Further, in the tooth 100 of the present embodiment, the lock pin 130 has the stepped surface 131a formed stepwise at the other end of the base end portion 131 on the opposite side to the tip end portion 132, and the hole 125 has an inner circumference. A step shape that fits with the step surface 131a is formed on the surface 126 that faces the step surface 131a when the lock pin 130 is fitted.

この構成により、ロックピン１３０の内部空間Ａへの嵌合の度合を作業者に容易に視認させることができる。例えば、作業者は、孔１２５の内周面１２６に対して、ロックピン１３０の段差面１３１ａのどの段まで挿入されているかをみれば、ロックピン１３０をさらに溝１１５側へ押し込むことができるのか、または、ロックピン１３０が内部空間Ａに完全に嵌合しているかなどを容易に把握できる。これにより、ロックピン１３０の取り付け作業の作業効率を向上できる。 With this configuration, the degree of fitting of the lock pin 130 into the internal space A can be easily recognized by the operator. For example, the worker can push the lock pin 130 further into the groove 115 side by checking up to which step of the step surface 131a of the lock pin 130 is inserted into the inner peripheral surface 126 of the hole 125. Alternatively, it is possible to easily grasp whether or not the lock pin 130 is completely fitted in the internal space A. Thereby, the work efficiency of the work of attaching the lock pin 130 can be improved.

以上、具体例を参照しつつ本実施形態について説明した。しかし、本開示はこれらの具体例に限定されるものではない。これら具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素およびその配置、条件、形状などは、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。 The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those obtained by those skilled in the art who appropriately change the design are also included in the scope of the present disclosure as long as they have the features of the present disclosure. The elements provided in each of the specific examples described above and the arrangement, conditions, shapes, and the like of the elements are not limited to those illustrated, but can be appropriately changed. The respective elements included in the above-described specific examples can be appropriately combined as long as there is no technical contradiction.

上記実施形態では、内部空間Ａは、孔１２５から支持部材の先端側（ｘ正方向）へロックピン１３０を挿入して回動させることで、ロックピン１３０を嵌入する構成を例示したが、ロックピン１３０の挿入方向が一方向であればよく、上記実施形態とは反対に、孔１２５から支持部材の基端側（ｘ負方向）へロックピン１３０を挿入して回動させる構成でもよい。 In the above-described embodiment, the internal space A exemplifies a configuration in which the lock pin 130 is fitted by inserting and rotating the lock pin 130 from the hole 125 toward the tip side (x positive direction) of the support member. It suffices that the pin 130 be inserted in one direction, and contrary to the above-described embodiment, the lock pin 130 may be inserted and rotated from the hole 125 to the base end side (x negative direction) of the support member.

上記実施形態では、アタッチメントの一例としてショベルのバケットに取り付けるツース１００を例示したが、アタッチメントはツース１００以外の物でもよいし、アタッチメントの取り付け対象は、例えば耕運機の爪の取り付け構造など、バケット以外の物に取り付ける構成でもよい。 In the above-described embodiment, the tooth 100 attached to the bucket of the shovel is illustrated as an example of the attachment, but the attachment may be something other than the tooth 100, and the attachment target of the attachment is other than the bucket, such as a claw attachment structure of a cultivator. It may be attached to an object.

１００ ツース（アタッチメント）
１１０ 支持部材
１１１ 凸部
１１１ａ、１１１ｂ 主面
１１２ａ、１１２ｂ 第１支持面
１１３ａ、１１３ｂ 第２支持面
１１４ 凹状部
１１５ 溝
１１５ａ 凹曲面
１１５ｂ 底面
１２０ 取替部材
１２０ａ、１２０ｂ 主面
１２１ 凹部
１２２ａ、１２２ｂ 第１曲面
１２３ａ、１２３ｂ 第２曲面
１２４ 耳部
１２５ 孔
１２６ 孔の内周面
１３０ ロックピン
１３１ 基端部
１３２ 先端部
１３２ａ 凸曲面
Ａ 内部空間
100 teeth (attachment)
110 support member 111 convex part 111a, 111b main surface 112a, 112b first support surface 113a, 113b second support surface 114 concave part 115 groove 115a concave curved surface 115b bottom surface 120 replacement member 120a, 120b main surface 121 concave part 122a, 122b first 1 curved surface 123a, 123b 2nd curved surface 124 ear part 125 hole 126 inner peripheral surface of hole 130 lock pin
131 Base End 132 Front End 132a Convex Curved Surface A Internal Space

Claims (14)

ロックピンであって、
金属製の基端部と、
当該ロックピンの長手方向に沿って前記基端部の一端側に形成された弾性材料の先端部と、を備える、
ロックピン。 A lock pin,
With a metal base end,
A distal end portion of an elastic material formed on one end side of the base end portion along the longitudinal direction of the lock pin,
Lock pin. 前記基端部は、短手方向に対向する底面と上面とを有し、
前記先端部は、前記底面から連続的に形成され、かつ、前記上面に対して前記短手方向に突出する略円弧状の凸曲面を有する、
請求項１に記載のロックピン。 The base end portion has a bottom surface and a top surface facing each other in the lateral direction,
The tip portion is formed continuously from the bottom surface, and has a substantially arcuate convex curved surface protruding in the lateral direction with respect to the top surface,
The lock pin according to claim 1. 前記基端部は、前記先端部とは反対側の他端に階段状に形成された段差面を有する、
請求項１または２に記載のロックピン。 The base end portion has a step surface formed stepwise at the other end opposite to the tip end portion,
The lock pin according to claim 1. 対象物に設けられる支持部材と、
前記支持部材に脱着可能に取り付けられる取替部材と、
前記支持部材と前記取替部材とを連結固定するロックピンと、
を備え、
前記ロックピンは、
金属製の基端部と、前記ロックピンの長手方向に沿って前記基端部の一端側に形成された弾性材料の先端部と、を備え、
前記支持部材と前記取替部材とに取り付けられた状態で、前記長手方向が前記取替部材の脱着方向に沿って配置され、前記取替部材を前記支持部材の方向へ押圧する力を発生する、
ロック構造。 A support member provided on the object,
A replacement member detachably attached to the support member;
A lock pin connecting and fixing the support member and the replacement member,
Equipped with
The lock pin is
A base end made of metal; and a tip end of an elastic material formed on one end side of the base end along the longitudinal direction of the lock pin,
The longitudinal direction is arranged along the attachment/detachment direction of the replacement member in a state of being attached to the support member and the replacement member, and a force for pressing the replacement member toward the support member is generated. ,
Lock structure. 対象物に取り付けられるアタッチメントであって、
前記対象物に設けられる支持部材と、
前記支持部材の先端の凸部が挿入される凹部が基端に設けられ、所定方向に突出して延在する取替部材と、
前記取替部材の延在方向と交差する側方の位置にて前記支持部材に設けられる溝と、
前記側方の位置にて前記取替部材に設けられ、前記取替部材が前記支持部材に嵌合した状態において前記溝の一部が露出するよう配置される孔と、
前記孔及び前記溝により形成される内部空間に嵌入され、前記取替部材と前記支持部材とを連結固定する、ロックピンと、
を備え、
前記ロックピンは、金属製の基端部と、前記ロックピンの長手方向に沿って前記基端部の一端側に形成された弾性材料の先端部と、を備え、
前記ロックピンは、前記内部空間に嵌入された状態では、その長手方向が前記取替部材の延在方向に沿って配置され、前記支持部材の溝を前記長手方向の一方側に押圧し、前記取替部材の孔の内周面を前記長手方向の他方側に押圧する、
アタッチメント。 An attachment that can be attached to an object,
A support member provided on the object,
A replacement member provided with a recess at the base end into which the projection of the tip of the support member is inserted, and protruding and extending in a predetermined direction,
A groove provided in the support member at a lateral position that intersects the extending direction of the replacement member,
A hole provided in the replacement member at the lateral position, and arranged such that a part of the groove is exposed when the replacement member is fitted to the support member;
A lock pin fitted into an internal space formed by the hole and the groove, connecting and fixing the replacement member and the support member,
Equipped with
The lock pin includes a metal base end portion, and a distal end portion of an elastic material formed on one end side of the base end portion along the longitudinal direction of the lock pin,
When the lock pin is fitted in the internal space, the longitudinal direction thereof is arranged along the extending direction of the replacement member, and presses the groove of the support member to one side of the longitudinal direction, Pressing the inner peripheral surface of the hole of the replacement member to the other side in the longitudinal direction,
attachment. 前記孔及び前記溝により形成される前記内部空間は、
前記孔から前記支持部材の先端側または基端側の一方へ前記ロックピンを挿入し、前記ロックピンの前記先端部が最奥部に突き当たった状態で、前記先端部を長手方向に押圧して弾性圧縮しつつ、前記先端部を中心として前記ロックピンを前記溝の方向に回動させることによって、前記ロックピンが嵌入されるよう形成される、
請求項５に記載のアタッチメント。 The internal space formed by the hole and the groove is
Insert the lock pin from the hole to one of the distal end side or the proximal end side of the support member, and press the distal end portion in the longitudinal direction with the distal end portion of the lock pin abutting the innermost portion. The elastic pin is formed so that the lock pin is fitted by rotating the lock pin in the direction of the groove while the elastic pin is being compressed.
The attachment according to claim 5. 前記溝は、前記支持部材の先端側または基端側が深くなるよう傾斜状に形成され、
前記孔は、溝の深いほうの端部が露出しない位置に配置され、
前記ロックピンの前記先端部は略円弧状の凸曲面を有し、
前記溝の深いほうの前記端部は、前記凸曲面と略同一の曲率半径で形成される凹曲面を有する、
請求項５または６に記載のアタッチメント。 The groove is formed in an inclined shape so that the front end side or the base end side of the support member is deep,
The hole is arranged at a position where the deeper end of the groove is not exposed,
The tip end portion of the lock pin has a substantially arc-shaped convex curved surface,
The deeper end of the groove has a concave curved surface formed with a radius of curvature substantially the same as the convex curved surface,
The attachment according to claim 5 or 6. 前記ロックピンは、前記溝の底面の全域を塞ぐ形状で形成される、
請求項５〜７のいずれか１項に記載のアタッチメント。 The lock pin is formed in a shape that covers the entire bottom surface of the groove.
The attachment according to any one of claims 5 to 7. 前記ロックピンは、前記先端部が前記孔から外部に露出しないように前記内部空間に嵌合される、
請求項５〜８のいずれか１項に記載のアタッチメント。 The lock pin is fitted into the internal space so that the tip portion is not exposed to the outside from the hole,
The attachment according to any one of claims 5 to 8. 前記支持部材は、前記対象物に複数個が並設され、
前記溝は、前記支持部材の並設方向の両側に設けられる、
請求項５〜９のいずれか１項に記載のアタッチメント。 A plurality of the support members are arranged side by side on the object,
The groove is provided on both sides of the support member in the juxtaposed direction,
The attachment according to any one of claims 5 to 9. 前記ロックピンは、前記先端部が前記長手方向に弾性圧縮した状態で前記内部空間に嵌入された後に、前記先端部が弾性復帰して前記ロックピンの全長が伸びることによって、前記先端部が前記支持部材の溝を前記長手方向の一方側に押圧し、前記基端部が、前記取替部材の孔の内周面を前記長手方向の他方側に押圧する、
請求項５〜１０のいずれか１項に記載のアタッチメント。 The lock pin is inserted into the internal space in a state where the tip portion is elastically compressed in the longitudinal direction, and then the tip portion is elastically restored to extend the entire length of the lock pin, whereby the tip portion is The groove of the support member is pressed to the one side in the longitudinal direction, the base end part presses the inner peripheral surface of the hole of the replacement member to the other side in the longitudinal direction,
The attachment according to any one of claims 5 to 10. 前記ロックピンは、前記先端部とは反対側の前記基端部の他端に階段状に形成された段差面を有し、
前記孔は、内周面のうち前記ロックピンの嵌合時に前記段差面と対向する面に前記段差面と嵌合する段差形状が形成される、
請求項５〜１１のいずれか１項に記載のアタッチメント。 The lock pin has a step surface formed stepwise on the other end of the base end portion on the side opposite to the tip end portion,
The hole has a stepped shape that is fitted to the stepped surface on a surface of the inner peripheral surface that faces the stepped surface when the lock pin is fitted.
The attachment according to any one of claims 5 to 11. 前記対象物は、ショベルのバケットであり、
前記支持部材、前記取替部材、及び前記ロックピンは、前記バケットの掘削側の先端部分に設けられるツースを構成する、
請求項５〜１２のいずれか１項に記載のアタッチメント。 The object is a shovel bucket,
The support member, the replacement member, and the lock pin constitute a tooth provided at a tip end portion of the bucket on the excavation side,
The attachment according to any one of claims 5 to 12. 対象物に設けられる支持部材と、
前記支持部材の先端の凸部が挿入される凹部が基端に設けられ、所定方向に突出して延在する取替部材と、
前記取替部材の延在方向と交差する側方の位置にて前記支持部材に設けられる溝と、
前記側方の位置にて前記取替部材に設けられ、前記取替部材が前記支持部材に嵌合した状態において前記溝の一部が露出するよう配置される孔と、
前記孔及び前記溝により形成される内部空間に嵌入され、前記取替部材と前記支持部材とを連結固定する、ロックピンと、
を備えるアタッチメントのロック方法であって、
金属製の基端部と、前記ロックピンの長手方向に沿って前記基端部の一端側に形成された弾性材料の先端部と、を備える前記ロックピンを、前記孔から前記内部空間へ前記先端部が最奥部に突き当たるまで挿入するステップと、
前記先端部を長手方向に押圧して弾性圧縮しつつ、前記先端部を中心として前記ロックピンを前記溝の方向に回動させるステップと、
前記ロックピンが、前記長手方向が前記取替部材の脱着方向に沿って配置され、前記取替部材を前記支持部材の方向へ押圧する力を発生させて、前記支持部材と前記取替部材とに取り付けられるステップと、
を含むロック方法。 A support member provided on the object,
A replacement member provided with a recess at the base end into which the projection of the tip of the support member is inserted, and protruding and extending in a predetermined direction,
A groove provided in the support member at a lateral position that intersects the extending direction of the replacement member,
A hole provided in the replacement member at the lateral position, and arranged such that a part of the groove is exposed when the replacement member is fitted to the support member;
A lock pin fitted into an internal space formed by the hole and the groove, connecting and fixing the replacement member and the support member,
A method of locking an attachment, comprising:
The lock pin including a metal base end portion and a tip end portion of an elastic material formed on one end side of the base end portion along the longitudinal direction of the lock pin, the lock pin from the hole to the internal space Inserting until the tip hits the deepest part,
Pressing the tip in the longitudinal direction to elastically compress the tip and rotating the lock pin in the direction of the groove about the tip,
The lock pin is arranged such that the longitudinal direction is along the attachment/detachment direction of the replacement member, and generates a force that presses the replacement member toward the support member, and the support member and the replacement member. Attached to the
Locking method including.
JP2019006156A 2019-01-17 2019-01-17 Lock pin, lock structure, attachment, and lock method Pending JP2020114967A (en)

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