JP4398754B2 - Gripper with magnet - Google Patents

Description

本発明は、パワーショベル等の建設機械のアーム先端に取り付けて使用される磁石付き掴み機に関するものである。   The present invention relates to a magnet gripping machine used by being attached to the tip of an arm of a construction machine such as a power shovel.

木造家屋等構築物を解体し、木材や鉄資源を回収するために、一般的にパワーショベル等の建設機械に装着された磁石付き掴み機が用いられている。磁石付き掴み機によって解体処理された廃棄物には、木材等の他に、釘やボルト等の磁性体廃材が混在しているが、廃棄物のリサイクルの観点や、釘等による車両のタイヤのパンク、けが等の事故を無くすためにも、磁性体廃材を完全に分別回収する必要がある。   In order to dismantle a structure such as a wooden house and collect wood and iron resources, a gripping machine with a magnet mounted on a construction machine such as a power shovel is generally used. Waste that has been dismantled by a gripping machine with magnets contains magnetic waste materials such as nails and bolts in addition to wood, etc., but from the viewpoint of recycling waste and vehicle tires such as nails. In order to eliminate accidents such as punctures and injuries, it is necessary to completely separate and recover the magnetic waste material.

ところで、廃棄物処理施設に搬入される廃棄物は、分別回収が一般的であるが、それでも少なからず、多様な廃棄物が混在した状態で搬入されることが多く、この場合、廃棄物処理施設での分別作業が必要となる。以前は、こういった分別作業は人力で行なっていたが、昨今は、磁石付き掴み機を使用して、磁性体廃材を吸着して回収するのが一般化しつつある。   By the way, the waste that is brought into the waste treatment facility is generally separated and collected. However, in many cases, the waste is often carried in a mixed state of various wastes. Separation work is necessary in In the past, such sorting work was performed manually, but nowadays, it is becoming more common to use a gripping machine with a magnet to attract and recover the magnetic waste material.

この種の磁石付き掴み機として、例えば図１０に示すように、２つの爪６，７を開閉自在とし、一方の爪７の先端爪の内面側（掴み面側）に磁石３の吸着面９ａを位置させ、廃棄物を爪６，７で掴んだ際に釘、ボルト等の磁性体廃材を磁石３で吸着するものが知られている（例えば、特許文献１参照）。   As a gripping machine with this kind of magnet, for example, as shown in FIG. 10, the two claws 6, 7 can be opened and closed, and the attracting surface 9a of the magnet 3 is provided on the inner surface side (gripping surface side) of the tip claw of one of the claws 7. Is known, and a magnetic material waste material such as a nail or a bolt is adsorbed by a magnet 3 when the waste is gripped by the claws 6 and 7 (see, for example, Patent Document 1).

ところが、上記特許文献１に示される構成にあっては、爪６，７の最大開き角度はせいぜい、９０°程度であり、このため磁石３による吸着は爪６，７間に磁性体廃材を掴んだ状態でのみ可能であり、例えば、爪６，７を大きく開いて磁石３を地面に近づけて磁性体廃材を吸着させることはできなかった。   However, in the configuration shown in Patent Document 1, the maximum opening angle of the claws 6 and 7 is at most about 90 °. Therefore, the adsorption by the magnet 3 grips the magnetic waste material between the claws 6 and 7. For example, the claws 6 and 7 can be opened widely to bring the magnet 3 close to the ground and cannot adsorb the waste magnetic material.

そこで、本発明者は、本発明の完成に至る過程で、図１１に示すように、磁石３をスペースに余裕のある下爪７の外面側（掴み面１０と反対側）に磁石ブラケット４０を介して取り付け、２つの爪６，７を閉じた状態で爪６，７を図１１の仮想線のように回転させて、磁石３を地面１１に近づけて、磁性体廃材を吸着できるようにした構成を考えた。   Therefore, in the process of completing the present invention, the present inventor places the magnet bracket 40 on the outer surface side (opposite side of the gripping surface 10) of the lower claw 7 having sufficient space as shown in FIG. With the two claws 6 and 7 closed, the claws 6 and 7 are rotated as indicated by phantom lines in FIG. 11 to bring the magnet 3 closer to the ground 11 so that the magnetic waste material can be adsorbed. I thought about the configuration.

しかしながら、上記の構成では、磁性体廃材を吸着する場合において、爪６，７の掴み操作とは別に、磁性体廃材を吸着する吸着操作が必要となる。つまり、掴み操作を行なう場合は図１１の実線で示すように、パワーショベル３０のアーム４を地面１１に対してほぼ垂直な姿勢となるが、一方、吸着操作を行なう場合は、図１１の仮想線で示すように、爪６，７を閉じた状態とし且つアーム４を回動させ、さらにブーム３１を下げることで、アーム４とブーム３１を前方に伸ばした状態とすることで、磁石３を地面１１に対して平行となるように掴み機２の姿勢を変更させる必要がある。このためオペレータは掴み操作から吸着操作に移る作業が面倒となり、時間を要し、依然として作業能率が低いものである。
特開２００３−２３８０６６号公報 However, in the above configuration, when adsorbing the magnetic waste material, an adsorption operation for adsorbing the magnetic waste material is required in addition to the gripping operation of the claws 6 and 7. That is, when the gripping operation is performed, as shown by the solid line in FIG. 11, the arm 4 of the power shovel 30 is substantially perpendicular to the ground 11. On the other hand, when the suction operation is performed, the virtual operation illustrated in FIG. 11 is performed. As shown by the lines, the claws 6 and 7 are closed, the arm 4 is rotated, and the boom 31 is further lowered to bring the arm 4 and the boom 31 into the forward state, thereby causing the magnet 3 to move. It is necessary to change the posture of the gripper 2 so as to be parallel to the ground 11. For this reason, the operator is troublesome to move from the grip operation to the suction operation, takes time, and the work efficiency is still low.
Japanese Patent Laid-Open No. 2003-238066

本発明は上記の従来の問題点に鑑みて発明したものであって、磁石装置で磁性体廃材を吸着して回収する際に爪の掴み操作の延長上で吸着操作が可能となり、しかも作業範囲がオペレータから近い範囲或いは遠方の範囲のいずれであっても、掴み操作から吸着操作の移行或いは吸着操作から掴み操作への移行がそれぞれ容易であり、作業能率を大幅に改善させることができる磁石付き掴み機を提供することを課題とするものである。   The present invention has been invented in view of the above-described conventional problems, and when the magnetic waste material is attracted and collected by the magnet device, the attracting operation can be performed on the extension of the gripping operation of the nail, and the working range is also achieved. With a magnet that makes it easy to shift from gripping operation to suction operation or from suction operation to gripping operation, and can greatly improve work efficiency, regardless of whether it is close or far from the operator It is an object to provide a gripping machine.

前記課題を解決するために、請求項１記載の発明にあっては、建設機械のアーム４の先端に開閉自在に設けられる掴み具５を上爪６と下爪７とで構成し、上爪６と下爪７とを連動して開閉させる開閉機構８を備えた磁石付き掴み機において、上爪６と下爪７の最大開き角度θを１８０°以上とし、上爪６と下爪７の少なくとも一方に磁石装置１を設けると共に、磁石装置１の吸着面９ａを爪６（７）の掴み面１０側に位置させたことを特徴としている。   In order to solve the above-mentioned problem, in the invention according to claim 1, the gripper 5 provided at the tip of the arm 4 of the construction machine so as to be openable and closable is composed of an upper nail 6 and a lower nail 7. In the gripping machine with a magnet provided with an opening / closing mechanism 8 that opens and closes 6 and the lower claw 7 in conjunction with each other, the maximum opening angle θ between the upper claw 6 and the lower claw 7 is 180 ° or more, and the upper claw 6 and the lower claw 7 The magnet device 1 is provided on at least one side, and the attracting surface 9a of the magnet device 1 is positioned on the gripping surface 10 side of the claw 6 (7).

このような構成とすることで、磁性体廃材１３を回収する場合は、爪６，７の掴み操作と同じ要領で上爪６と下爪７を１８０°以上開いた状態にするだけで、爪６，７の両先端爪６ａ，７ａが地面１１に当たらないようにしながら、磁石３の吸着面９ａを地面１１に対して平行な状態で地面１１に近づけることができ、吸着面９ａに磁性体廃材１３を吸着させることができる。従って、オペレータは爪６，７の掴み操作の延長上で磁性体廃材１３の吸着操作を行なえると共に、掴み操作と同じ作業範囲で、掴み操作から吸着操作の移行或いは吸着操作から掴み操作への移行がそれぞれ容易となる。しかも、吸着操作時において上爪６と下爪７とを１８０°以上開くことで、作業範囲がオペレータから近い範囲或いは遠方の範囲のいずれであっても、爪６，７で視界が遮られることがなく、吸着面９ａと磁性体廃材１３、地面１１の位置関係や、吸着量の確認が容易となり、吸着作業範囲を大きく広げることが可能となる。   With this configuration, when collecting the magnetic waste 13, the upper and lower claws 6 and 7 are opened by 180 ° or more in the same manner as the gripping operation of the claws 6 and 7. The suction surface 9a of the magnet 3 can be brought close to the ground surface 11 in a state parallel to the ground surface 11 so that the both end claws 6a, 7a of the 6th and 7th do not hit the ground surface 11, and the magnetic material is attached to the suction surface 9a. The waste material 13 can be adsorbed. Accordingly, the operator can perform the suction operation of the magnetic waste material 13 on the extension of the gripping operation of the claws 6 and 7, and can move from the gripping operation to the suctioning operation or from the suctioning operation to the gripping operation in the same work range as the gripping operation. Each transition is easy. Moreover, when the upper nail 6 and the lower nail 7 are opened by 180 ° or more during the suction operation, the field of view is obstructed by the nail 6, 7 regardless of whether the work range is near or far from the operator. Therefore, the positional relationship between the suction surface 9a, the magnetic waste material 13, and the ground 11 and the amount of suction can be easily confirmed, and the suction work range can be greatly expanded.

また請求項１記載の発明は、上記開閉機構８が、建設機械のアーム４の先端にホルダ１４を軸着し、ホルダ１４の先端に設けられる上爪支点軸１５に上爪６の後部を軸着し、上爪６の上爪支点軸１５よりも先端爪６ａ側の部位に建設機械のパワーリンク１６の先端を軸着し、上爪６の上爪支点軸１５よりも後端６ｂ側の爪連結軸１７に下爪７の後端７ｂを軸着し、下爪７の後端７ｂよりも先端爪７ａ側に設けた下爪支点軸１８に連動リンク１９の一端を軸着し、連動リンク１９の他端をホルダ１４の上爪支点軸１５よりも後側の部位に軸着し、ホルダ１４の上爪支点軸１５よりも後側において、ホルダ１４又はアーム４の少なくとも一方に支持リンク２０の一端を軸着すると共に、支持リンク２０の他端をパワーリンク１６の後端側に軸着して構成し、上記パワーリンク１６により上爪６が上爪支点軸１５を中心に開かれると同時に、下爪７の下爪支点軸１８が連動リンク１９に引っ張られて下爪７が爪連結軸１７を中心に開かれる際に、爪連結軸１７が上爪支点軸１５と下爪支点軸１８とを結ぶ線Ｌよりも前方Ｆに移動することで、上爪６と下爪７の最大開き角度θが１８０°以上となることを特徴とする。 The invention according to claim 1, the opening and closing mechanism 8, pivotally attached to the holder 14 at the tip of the arm 4 of the construction machine, the axis of the rear portion of the upper finger 6 on the pawl pivot shaft 15 provided at the distal end of the holder 14 The tip of the power link 16 of the construction machine is pivotally attached to a portion of the upper claw 6 on the tip claw 6a side of the upper claw fulcrum shaft 15 of the upper claw 6 and the rear claw fulcrum shaft 15 of the upper claw 6 is on the rear end 6b side. The rear end 7b of the lower claw 7 is pivotally attached to the claw coupling shaft 17, and one end of the interlocking link 19 is axially attached to the lower claw fulcrum shaft 18 provided closer to the front end claw 7a than the rear end 7b of the lower claw 7. The other end of the link 19 is pivotally attached to a portion on the rear side of the upper claw fulcrum shaft 15 of the holder 14, and the support link is attached to at least one of the holder 14 or the arm 4 on the rear side of the upper claw fulcrum shaft 15 of the holder 14. The other end of the support link 20 is attached to the rear end side of the power link 16. The upper claw 6 is opened around the upper claw fulcrum shaft 15 by the power link 16 and at the same time the lower claw fulcrum shaft 18 of the lower claw 7 is pulled by the interlocking link 19 so that the lower claw 7 is connected to the claw coupling shaft 17. When the claw connecting shaft 17 is moved forward F from the line L connecting the upper claw fulcrum shaft 15 and the lower claw fulcrum shaft 18, the maximum opening angle of the upper claw 6 and the lower claw 7 is opened. θ is you, characterized in that the 180 ° or more.

また請求項２記載の発明は、上記開閉機構８が、建設機械のアーム４の先端にリンクブラケット２１を介してホルダ１４を軸着すると共に、建設機械のパワーリンク１６によりホルダ１４をリンクブラケット２１を中心に回動可能とし、ホルダ１４の先端に設けられる上爪支点軸１５に上爪６の後部を軸着し、上爪６の上爪支点軸１５よりも先端爪６ａ側の部位に、爪開閉用シリンダ２３の一端２３ａを軸着し、爪開閉用シリンダ２３の他端２３ｂをホルダ１４の上爪支点軸１５よりも後側の部位に軸着し、上爪６の上爪支点軸１５よりも後端６ｂ側の爪連結軸１７に下爪７の後端７ｂを軸着し、下爪７の後端７ｂよりも先端爪７ａ側に設けた下爪支点軸１８に連動リンク１９の一端を軸着すると共に、連動リンク１９の他端をホルダ１４の上爪支点軸１５よりも後側の部位に軸着して構成し、上記爪開閉用シリンダ２３により上爪６が上爪支点軸１５を中心に開かれると同時に、下爪７の下爪支点軸１８が連動リンク１９に引っ張られて下爪７が爪連結軸１７を中心に開かれる際に、爪連結軸１７が上爪支点軸１５と下爪支点軸１８とを結ぶ線Ｌよりも前方Ｆに移動することで、上爪６と下爪７の最大開き角度θが１８０°以上となることを特徴とする。 The invention of claim 2, the opening and closing mechanism 8, as well as pivotally attached to the holder 14 at the tip of the arm 4 of the construction machine via a link bracket 21, the construction machine of the power link 16 by a link holder 14 Bracket 21 And the rear portion of the upper claw 6 is pivotally attached to the upper claw fulcrum shaft 15 provided at the front end of the holder 14, and the upper claw 6 is positioned closer to the front claw 6 a than the upper claw fulcrum shaft 15. One end 23 a of the claw opening / closing cylinder 23 is pivotally attached, and the other end 23 b of the claw opening / closing cylinder 23 is pivotally attached to a portion on the rear side of the upper claw fulcrum shaft 15 of the holder 14. The rear end 7b of the lower claw 7 is pivotally attached to the claw coupling shaft 17 on the rear end 6b side of the link 15, and the interlocking link 19 is connected to the lower claw fulcrum shaft 18 provided on the front end claw 7a side of the lower claw 7 rear end 7b. The other end of the interlocking link 19 is attached to the holder 14. The upper claw 6 is opened around the upper claw fulcrum shaft 15 by the claw opening / closing cylinder 23, and at the same time the lower claw fulcrum shaft of the lower claw 7 is supported. When 18 is pulled by the interlocking link 19 and the lower claw 7 is opened around the claw coupling shaft 17, the claw coupling shaft 17 is more forward F than the line L connecting the upper claw fulcrum shaft 15 and the lower claw fulcrum shaft 18. by moving to, it characterized in that the maximum opening angle of the upper pawl 6 and lower claw 7 theta is more than 180 °.

上記請求項１、２において、爪連結軸１７と上爪支点軸１５と下爪支点軸１８との位置関係を、上爪６と下爪７を大きく開いたときに、爪連結軸１７が上爪支点軸１５と下爪支点軸１８とを結ぶ線Ｌよりも前方Ｆに移動するように設計するだけで、上爪６と下爪７とが１８０°以上開放可能な開閉機構８を容易に得ることができる。
さらに上記請求項１及び請求項２記載の発明は、磁石装置１が設けられる爪６（７）の掴み面１０において、磁石装置１の吸着面９ａと爪６（７）の先端爪６ａ（７ａ）との間に吸着面９ａよりも凹曲状に窪んだ掴み用凹所１０ａを設けると共に、掴み用凹所１０ａと吸着面９ａとの境界部に吸着面９ａよりも僅かに凸状に突出した突起部２６を突設させたことを特徴とする。この場合、上爪６と下爪７とを１８０°以上開いて、磁石装置１の吸着面９ａを地面１１と平行な状態にして地面１１に近づけたときに、吸着面９ａより僅かに突出した突起部２６が地面１１に当たることで、吸着面９ａが地面１１に強く当たることを防止でき、突起部２６によって地面１１からの衝撃を受け止めることができ、磁石装置１の長寿命化を図ることができる。また、掴み操作時には掴み用凹所１０ａによって磁性体廃材１３等を補助的に掴むことが可能となる。また、上記のように吸着面９ａを地面１１と平行な状態にして地面１１に近づけたときに、突起部２６により例えばブリキのような薄鋼板が吸着面９ａに吸着されてしまうのを防止できる。つまり、大型サイズの薄鋼板が吸着されてしまうと、薄鋼板が揺れることにより落下事故につながるおそれがあるが、突起部２６が薄鋼板が当たることによって薄鋼板の吸着を未然に防止できるものとなる。さらに薄鋼板が突起部２６を避けて吸着面９ａに吸着される場合があるが、この場合は、上爪６と下爪７を持ち上げる際に、吸着面９ａが垂直向きになって薄鋼板がずれて落下しようとするのを、突起部２６によって防止可能となる。 In the first and second aspects, the positional relationship among the claw coupling shaft 17, the upper claw fulcrum shaft 15, and the lower claw fulcrum shaft 18 is such that when the upper claw 6 and the lower claw 7 are largely opened, The opening / closing mechanism 8 that allows the upper and lower claws 6 and 7 to be opened by 180 ° or more can be easily achieved simply by designing the movement so as to move forward F from the line L connecting the claw fulcrum shaft 15 and the lower claw fulcrum shaft 18. Obtainable.
Further, in the inventions according to the first and second aspects, in the gripping surface 10 of the claw 6 (7) on which the magnet device 1 is provided, the attracting surface 9a of the magnet device 1 and the tip claw 6a (7a of the claw 6 (7) are provided. ) Between the suction surface 9a and the suction surface 9a. The gripping recess 10a is recessed more concavely than the suction surface 9a and protrudes slightly more convex than the suction surface 9a at the boundary between the gripping recess 10a and the suction surface 9a. The protruding portion 26 is protruded. In this case, when the upper claw 6 and the lower claw 7 are opened by 180 ° or more and the attracting surface 9a of the magnet device 1 is parallel to the ground 11 and brought close to the ground 11, it slightly protrudes from the attracting surface 9a. Since the protrusion 26 hits the ground 11, the suction surface 9 a can be prevented from strongly hitting the ground 11, the impact from the ground 11 can be received by the protrusion 26, and the life of the magnet device 1 can be extended. it can. Further, during the gripping operation, the waste magnetic material 13 and the like can be supplementarily gripped by the gripping recess 10a. Further, when the suction surface 9a is made parallel to the ground 11 and brought close to the ground 11 as described above, it is possible to prevent a thin steel plate such as tinplate from being attracted to the suction surface 9a by the protrusion 26. . In other words, if a thin steel plate of a large size is adsorbed, there is a risk of a fall accident due to shaking of the thin steel plate, but it is possible to prevent the adsorption of the thin steel plate by hitting the projection 26 with the thin steel plate. Become. Further, the thin steel plate may be adsorbed to the adsorption surface 9a while avoiding the protrusions 26. In this case, when the upper claw 6 and the lower claw 7 are lifted, the adsorption surface 9a becomes vertical and the thin steel plate is It is possible to prevent the protrusions 26 from being shifted and falling.

また請求項３記載の発明は、請求項１又は請求項２の磁石装置１が、爪６（７）の掴み面１０側に開口する磁石収納凹部２５内に収納される磁石３と、磁石収納凹部２５の開口面を遮蔽する保護板９とを備えていることを特徴とするのが好ましく、この場合、磁石３を保護でき、磁石３の損傷、磨耗等を確実に防止できる。 According to a third aspect of the present invention, the magnet device 1 according to the first or second aspect includes the magnet 3 housed in the magnet housing recess 25 opened on the gripping surface 10 side of the claw 6 (7), and the magnet housing. It is preferable that a protective plate 9 that shields the opening surface of the recess 25 is provided. In this case, the magnet 3 can be protected, and damage or wear of the magnet 3 can be reliably prevented.

また請求項４記載の発明は、請求項１乃至請求項３のいずれかの磁石装置１が設けられる爪６（７）の掴み面１０において、磁石装置１の吸着面９ａを平坦に形成すると共に、該平坦な吸着面９ａの延長線上に爪６（７）の先端爪６ａ（７ａ）を位置させたことを特徴とするのが好ましく、この場合、上爪６と下爪７とを１８０°以上開いて、磁石装置１の吸着面９ａを地面１１と平行な状態にして地面１１に近づけたときに、爪６（７）の先端爪６ａ（７ａ）が地面１１に当たらず、磁性体廃材１３の吸着操作が妨げられることがなくなる。 According to a fourth aspect of the present invention, the attracting surface 9a of the magnet device 1 is formed flat on the gripping surface 10 of the claw 6 (7) provided with the magnet device 1 of any one of the first to third aspects. The tip claw 6a (7a) of the claw 6 (7) is preferably positioned on the extended line of the flat suction surface 9a. In this case, the upper claw 6 and the lower claw 7 are 180 °. When the suction surface 9a of the magnet device 1 is opened parallel to the ground 11 and brought close to the ground 11, the tip claw 6a (7a) of the claw 6 (7) does not hit the ground 11 and the magnetic material waste material The 13 suction operation is not hindered.

また請求項５記載の発明は、請求項１乃至請求項４のいずれかにおいて、磁石装置１が設けられない上爪６又は下爪７のいずれか一方がバケットであることを特徴とするのが好ましく、この場合、掴み具５として、磁石装置１付き爪とバケットとの組み合わせが可能となり、掴み具５の仕様を多様化することができる。 According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the upper claw 6 or the lower claw 7 on which the magnet device 1 is not provided is a bucket. Preferably, in this case, the gripper 5 can be a combination of a claw with a magnet device 1 and a bucket, and the specifications of the gripper 5 can be diversified.

本発明にあっては、磁石付き掴み機を用いて磁性体廃材を吸着回収するにあたって、爪の掴み操作の延長上で、磁石装置による吸着操作を行なうことができ、しかも作業範囲がオペレータから近い範囲或いは遠方の範囲のいずれであっても、吸着操作を容易にでき、作業能率を大幅に改善させることができる。さらに磁石装置の長寿命化を図ることができると共に、磁性体廃材の落下事故の未然防止を図ることができる。 In the present invention, when the magnetic waste material is attracted and collected using the magnet gripping machine, the attracting operation by the magnet device can be performed on the extension of the gripping operation of the claw, and the working range is close to the operator. In either the range or the distant range, the adsorption operation can be facilitated, and the work efficiency can be greatly improved. Furthermore, it is possible to extend the life of the magnet device and to prevent accidental dropping of the magnetic waste material.

以下、本発明を添付図面に示す実施形態に基いて説明する。   Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

図１、図３、図４は本発明の磁石付き掴み機２を示し、図２は磁石付き掴み機２を取り付けたパワーショベル３０の一例を示し、図５〜図７は磁石付き掴み機２の使用例を示している。   1, 3, and 4 show the magnet gripping machine 2 of the present invention, FIG. 2 shows an example of a power shovel 30 to which the magnet gripping machine 2 is attached, and FIGS. 5 to 7 show the magnet gripping machine 2. An example of using is shown.

本発明の磁石付き掴み機２は、図２に示すように、パワーショベル３０のアーム４の先端に取り付けられるアタッチメントであり、上爪６と下爪７とで構成される掴み具５と、上爪６と下爪７とを連動して開閉させると共に上爪６と下爪７の最大開き角度θを１８０°以上とすることができる開閉機構８とを備えている。   The magnet-equipped gripping machine 2 of the present invention is an attachment attached to the tip of the arm 4 of the power shovel 30 as shown in FIG. 2, and includes a gripping tool 5 composed of an upper claw 6 and a lower claw 7, An opening / closing mechanism 8 is provided that opens and closes the nail 6 and the lower nail 7 in conjunction with each other and can set the maximum opening angle θ of the upper nail 6 and the lower nail 7 to 180 ° or more.

上記開閉機構８は、図１に示すように、アーム４の先端に軸着されるホルダ１４を備える。ホルダ１４の先端に設けられる上爪支点軸１５には、上爪６の後部が軸着されている。上爪６の上爪支点軸１５に軸着される後部よりも先端爪６ａ側の部位には、パワーリンク１６の先端のリンクブラケット２２が軸着されている。パワーリンク１６の後端側はバケットシリンダ３２（図２）の先端に軸着されている。本例のパワーリンク１６は、バケットシリンダ３２のパワーを上爪６に伝達する伝達リンクとして働く。   As shown in FIG. 1, the opening / closing mechanism 8 includes a holder 14 that is pivotally attached to the tip of the arm 4. A rear portion of the upper claw 6 is pivotally attached to an upper claw fulcrum shaft 15 provided at the tip of the holder 14. A link bracket 22 at the distal end of the power link 16 is pivotally attached to a portion closer to the distal pawl 6a than the rear portion pivotally attached to the upper pawl fulcrum shaft 15 of the upper pawl 6. The rear end side of the power link 16 is pivotally attached to the tip of the bucket cylinder 32 (FIG. 2). The power link 16 of this example functions as a transmission link that transmits the power of the bucket cylinder 32 to the upper claw 6.

一方、上爪６の上爪支点軸１５よりも後端６ｂ側に設けた爪連結軸１７には、下爪７の後端７ｂが軸着される。一方、下爪７の後端７ｂよりも先端爪７ａ側に設けた下爪支点軸１８には、連動リンク１９の一端が軸着され、連動リンク１９の他端は、ホルダ１４の上爪支点軸１５よりも後側で且つ下側の部位に軸着される。さらに、ホルダ１４の上爪支点軸１５よりも後側において、ホルダ１４とアーム４の両方に支持リンク２０の一端が軸着されると共に、支持リンク２０の他端がパワーリンク１６の後端側に軸着される。なお、上記支持リンク２０の一端は、必ずしも、ホルダ１４とアーム４の両方に軸着される必要はなく、ホルダ１４又はアーム４のいずれか一方に軸着されてもよい。ここで、支持リンク２０の一端をアーム４のみに軸着する場合においては、ホルダ１４は支持リンク２０の一端とは別の位置で、且つアーム４の先端よりも後側の部位に取り付けるようにすればよく、いずれの場合も、ホルダ１４はアーム４の先端と後側の部位の前後２箇所で取り付けられることとなり、ホルダ１４をアーム４に対して回転しないように固定できるようになる。そして、図１に示すように、パワーリンク１６により上爪６が上爪支点軸１５を中心に開かれると同時に、下爪７の下爪支点軸１８が連動リンク１９に引っ張られて下爪７が爪連結軸１７を中心に開かれる際に、爪連結軸１７が上爪支点軸１５と下爪支点軸１８とを結ぶ線Ｌよりも前方Ｆに移動することで、上爪６と下爪７との最大開き角度θが１８０°以上となる。   On the other hand, the rear end 7b of the lower claw 7 is pivotally attached to the claw coupling shaft 17 provided on the rear end 6b side of the upper claw fulcrum shaft 15 of the upper claw 6. On the other hand, one end of the interlocking link 19 is pivotally attached to the lower pawl fulcrum shaft 18 provided on the tip pawl 7a side with respect to the rear end 7b of the lower pawl 7, and the other end of the interlocking link 19 is the upper pawl fulcrum of the holder 14. The shaft 15 is attached to the rear side and the lower side of the shaft 15. Further, one end of the support link 20 is pivotally attached to both the holder 14 and the arm 4 on the rear side of the upper claw fulcrum shaft 15 of the holder 14, and the other end of the support link 20 is the rear end side of the power link 16. It is attached to. Note that one end of the support link 20 is not necessarily pivotally attached to both the holder 14 and the arm 4, and may be pivotally attached to either the holder 14 or the arm 4. Here, in the case where one end of the support link 20 is attached to the arm 4 only, the holder 14 is attached at a position different from one end of the support link 20 and on the rear side of the tip of the arm 4. In any case, the holder 14 is attached to the front and rear portions of the arm 4 at two locations, front and rear, so that the holder 14 can be fixed to the arm 4 so as not to rotate. As shown in FIG. 1, the upper claw 6 is opened around the upper claw fulcrum shaft 15 by the power link 16, and at the same time, the lower claw fulcrum shaft 18 of the lower claw 7 is pulled by the interlocking link 19. When the claw coupling shaft 17 is opened around the claw coupling shaft 17, the claw coupling shaft 17 moves forward F from the line L connecting the upper claw fulcrum shaft 15 and the lower claw fulcrum shaft 18. 7 is 180 ° or more.

また、下爪７の掴み面１０には滑り防止用の小突起６０が複数設けられている。一方、上爪６の掴み面１０側には、図３に示すように、断面コ字状の磁石収納凹部２５が開口しており、この磁石収納凹部２５内にケーシング４５と磁石３と保護板９とを備えた磁石装置１が埋設されている。保護板９は、磁石３の吸着力を妨げることのない磁性材料からなり、その表面が吸着面９ａとなっている。本例では図４（ａ）に示すように、ケーシング４５の前端外周に、外郭が四角形状をし、その内側に円形孔４５ｂが開口した前枠４５ａが設けられており、ケーシング４５内に磁石３（図３）を収納した状態で、図４（ｂ）に示すように、前枠４５ａの四隅に保護板９の四隅をボルト固定することで、磁石３が保護板９で遮蔽された状態となっている。この保護板９の表面は平坦な吸着面９ａであり、この平坦な吸着面９ａの延長線上に上爪６の先端爪６ａが配置されている。さらに、上爪６の先端爪６ａと吸着面９ａとの間には、吸着面９ａよりも凹曲状に窪んだ掴み用凹所１０ａが設けられている。この掴み用凹所１０ａは掴み操作時において廃棄物を補助的に掴む働きをする。さらに掴み用凹所１０ａと吸着面９ａとの境界部には、吸着面９ａよりも僅かに凸状に突出した左右一対の突起部２６が突設されている。この突起部２６は上爪６と下爪７とを１８０°以上開いて磁石装置１の吸着面９ａを地面１１と平行な状態にして地面１１に近づけたときに、吸着面９ａが地面１１に強く当たるのを防止する働きをする。   A plurality of small protrusions 60 for preventing slippage are provided on the gripping surface 10 of the lower claw 7. On the other hand, as shown in FIG. 3, a magnet storage recess 25 having a U-shaped cross section is opened on the gripping surface 10 side of the upper claw 6, and the casing 45, the magnet 3, and the protection plate are opened in the magnet storage recess 25. 9 is embedded. The protective plate 9 is made of a magnetic material that does not interfere with the attractive force of the magnet 3, and its surface is an attractive surface 9 a. In this example, as shown in FIG. 4 (a), a front frame 45 a is formed on the outer periphery of the front end of the casing 45. The front frame 45 a has a square shape and a circular hole 45 b is opened inside. 3 (FIG. 3) in a state in which the magnet 3 is shielded by the protective plate 9 by bolting the four corners of the protective plate 9 to the four corners of the front frame 45a as shown in FIG. 4 (b). It has become. The surface of the protective plate 9 is a flat suction surface 9a, and the tip claw 6a of the upper claw 6 is disposed on an extension line of the flat suction surface 9a. Further, a gripping recess 10a is provided between the tip claw 6a of the upper claw 6 and the suction surface 9a so as to be recessed more concavely than the suction surface 9a. This gripping recess 10a serves to grip the waste as an auxiliary during the gripping operation. Further, a pair of left and right projections 26 projecting slightly from the suction surface 9a is provided at the boundary between the gripping recess 10a and the suction surface 9a. The protrusion 26 opens the upper claw 6 and the lower claw 7 by 180 ° or more so that the attracting surface 9a of the magnet device 1 is parallel to the ground 11 and is brought close to the ground 11. It works to prevent strong hits.

しかして、本発明の磁石付き掴み機２を用いて磁性体廃材１３を回収するにあたっては、爪６，７の掴み操作をする要領で、磁性体廃材１３を吸着する吸着操作を行なうことができる。つまり、上爪６と下爪７の掴み操作を行なう場合は、例えば図５に示すように、パワーショベルのアーム４を地面１１に対してほぼ垂直な姿勢とし、上爪６と下爪７の両先端爪６ａ，７ａが下方を向く姿勢にして廃棄物１２或いは磁性体廃材１３等を掴み、図６の状態で回収することができる。   Thus, when collecting the magnetic waste material 13 using the magnet gripping machine 2 of the present invention, an adsorption operation for adsorbing the magnetic waste material 13 can be performed in the manner of gripping the claws 6 and 7. . That is, when performing the gripping operation of the upper and lower claws 6 and 7, for example, as shown in FIG. The both end claws 6a and 7a can be directed downward to grasp the waste 12 or the magnetic waste material 13 and collect them in the state shown in FIG.

一方、主に地面１１上の磁性体廃材１３を吸着操作により回収する場合は、例えば図７に示すように、上爪６と下爪７を１８０°以上開いて、爪６，７の両先端爪６ａ，７ａが地面１１に当たらないようにしながら、磁石３の吸着面９ａを地面１１に対して平行な状態にして地面１１に近づける。このとき、爪６，７の開度を僅かに閉じる方向に変化させる。その後、例えば、図７の実線位置から仮想線位置の方向（或いは仮想線位置から実線位置の方向）に動かすことにより、地面１１に落ちている釘やボルト等の磁性体廃材１３を吸着回収できる。   On the other hand, when mainly recovering the magnetic material waste 13 on the ground surface 11 by an adsorption operation, for example, as shown in FIG. The attracting surface 9a of the magnet 3 is made parallel to the ground 11 and brought close to the ground 11 while preventing the claws 6a and 7a from hitting the ground 11. At this time, the opening degree of the claws 6 and 7 is changed in a slightly closing direction. Thereafter, for example, by moving from the solid line position in FIG. 7 to the virtual line position (or from the virtual line position to the solid line position), the magnetic waste 13 such as nails and bolts falling on the ground 11 can be collected by suction. .

この場合において、磁石３は保護板９で遮蔽されて保護されているため、磁石３の損傷、磨耗等を確実に防止でき、磁石装置１の吸着性能を長期に亘って持続することができる。しかも、磁石装置１の吸着面９ａを平坦に形成し、この吸着面９ａの延長線上に上爪６の先端爪６ａを配置しているので、爪６，７の両先端爪６ａ，７ａが地面１１に当たらず、磁性体廃材１３の吸着操作が妨げられることがない。また、吸着面９ａの側方には吸着面９ａよりも僅かに凸状に突出した突起部２６が突設されているので、磁石装置１の吸着面９ａを地面１１に近づけたときに、吸着面９ａより僅かに突出した突起部２６が先に地面１１に当たることで、吸着面９ａが地面１１に強く当たることを防止でき、突起部２６によって地面１１からの衝撃を受け止めることができる。この結果、磁石装置１は上記保護板９と突起部２６とで２段階的に保護される構造となり、その長寿命化を図ることができる。また、上記のように吸着面９ａを地面１１に近づけたときは、突起部２６により例えばブリキのような薄鋼板が吸着面９ａに吸着されてしまうのを防止できる効果が得られる。さらに、薄鋼板が突起部２６を避けて吸着面９ａに吸着された場合にあっては、上爪６と下爪７を持ち上げる際に、吸着面９ａが垂直向きになって薄鋼板がずれて落下しようとするのを、突起部２６によって薄鋼板を保持でき、その落下を防止できる効果も得られる。   In this case, since the magnet 3 is shielded and protected by the protection plate 9, damage, wear, etc. of the magnet 3 can be reliably prevented, and the adsorption performance of the magnet device 1 can be maintained over a long period of time. In addition, since the attracting surface 9a of the magnet device 1 is formed flat and the tip claws 6a of the upper claws 6 are arranged on the extended line of the attracting surface 9a, both the tip claws 6a and 7a of the claws 6 and 7 are connected to the ground. 11 and the adsorption operation of the magnetic waste 13 is not hindered. Further, since a protruding portion 26 that protrudes slightly more convex than the attracting surface 9a is provided on the side of the attracting surface 9a, when the attracting surface 9a of the magnet device 1 is brought close to the ground 11, the attracting surface 9a is attracted. The protrusion 26 slightly projecting from the surface 9a first hits the ground 11, so that the suction surface 9a can be prevented from strongly hitting the ground 11, and the impact from the ground 11 can be received by the protrusion 26. As a result, the magnet device 1 is protected in two steps by the protection plate 9 and the protrusion 26, and the life of the magnet device 1 can be increased. In addition, when the suction surface 9a is brought close to the ground 11 as described above, an effect can be obtained in which a thin steel plate such as a tin plate can be prevented from being attracted to the suction surface 9a by the protrusions 26. Further, when the thin steel plate is attracted to the suction surface 9a avoiding the protrusion 26, when the upper and lower claws 6 and 7 are lifted, the suction surface 9a becomes vertical and the thin steel plate is displaced. The thin steel plate can be held by the protrusions 26 to be dropped, and the effect of preventing the fall can be obtained.

しかも、上記のように掴み操作と同じ要領で上爪６と下爪７を１８０°以上開くだけで吸着操作に移ることができるようになり、逆に吸着操作から掴み操作への移行も容易であり、従来のようなブーム３１、アーム４、掴み機２の姿勢変更を行なう必要がなく、しかもパワーショベル３０の近くで掴み作業を行なっている場合或いは遠く離れた位置で掴み作業を行なっている場合のいずれの場合も、同じ作業範囲で、吸着操作に容易に切り変えることが可能となる。そのうえ吸着操作時において、上爪６と下爪７とを１８０°以上開くことでオペレータは爪６，７の先端爪６ａ，７ａで視界が遮られることがないため、吸着面９ａと磁性体廃材１３、地面１１の位置関係が確認しやすくなり、吸着量の確認も容易となり、吸着作業範囲を大きく広げることができる。そのうえ、上爪６の掴み面１０側に磁石装置１の吸着面９ａが位置しているため、磁石装置１がアーム４やパワーリンク１６と干渉することもなく、磁石装置１が操作の妨げになることもない。この結果、従来と比較して吸着操作の手間や時間を大幅に削減できるものである。   In addition, as described above, it is possible to move to the suction operation just by opening the upper claw 6 and the lower claw 7 by 180 ° or more in the same manner as the gripping operation, and conversely, the transition from the suction operation to the gripping operation is easy. There is no need to change the posture of the boom 31, the arm 4 and the gripping machine 2 as in the prior art, and the gripping work is performed when the gripping work is performed near the power shovel 30 or at a far away position. In any case, it is possible to easily switch to the suction operation within the same work range. In addition, when the suction operation is performed, the operator can open the upper and lower claws 6 and 7 by 180 ° or more so that the field of view is not blocked by the front claws 6a and 7a of the claws 6 and 7. 13, it becomes easy to confirm the positional relationship between the ground surface 11 and the amount of adsorption can be easily confirmed, and the adsorption work range can be greatly expanded. In addition, since the attracting surface 9a of the magnet device 1 is located on the gripping surface 10 side of the upper claw 6, the magnet device 1 does not interfere with the arm 4 and the power link 16, and the magnet device 1 obstructs the operation. It will never be. As a result, the labor and time of the adsorption operation can be greatly reduced as compared with the conventional case.

また本例では、上爪６と下爪７を大きく開いたときに爪連結軸１７が上爪支点軸１５と下爪支点軸１８とを結ぶ線Ｌよりも前方Ｆに移動するように、爪連結軸１７と上爪支点軸１５と下爪支点軸１８との位置関係を設計するだけで、上爪６と下爪７とが１８０°以上開放可能な開閉機構８を容易に実現できる利点がある。さらに、上爪６と下爪７を閉じて掴み操作を行なう場合において、凹曲状に窪んだ掴み用凹所１０ａによって廃棄物を補助的に掴むことが可能となり、掴み性能をより高めることができる利点もある。   Further, in this example, the nail coupling shaft 17 is moved forward F from the line L connecting the upper nail fulcrum shaft 15 and the lower nail fulcrum shaft 18 when the upper nail 6 and the lower nail 7 are largely opened. By simply designing the positional relationship among the connecting shaft 17, the upper claw fulcrum shaft 15, and the lower claw fulcrum shaft 18, the opening / closing mechanism 8 that allows the upper claw 6 and the lower claw 7 to be opened by 180 ° or more can be easily realized. is there. Furthermore, when the gripping operation is performed with the upper and lower claws 6 and 7 closed, the waste can be supplementarily gripped by the grip recess 10a that is recessed in a concave shape, and the gripping performance can be further improved. There is also an advantage that can be done.

図８、図９は油圧式開閉機構８の実施形態を示している。図８に示すように、パワーショベル３０のアーム４の先端にリンクブラケット２１を介してホルダ１４の後端下部を軸着すると共に、パワーリンク１６の先端のリンクブラケット２２をホルダ１４の後端上部に軸着し、パワーリンク１６の後端側をバケットシリンダ３２の先端に連結することで、パワーリンク１６によってホルダ１４をリンクブラケット２１を中心に回動可能としている。本例のパワーリンク１６はホルダ１４を回転させる働きをする。また、ホルダ１４の先端に設けた上爪支点軸１５に、上爪６の後部が軸着され、上爪６の上爪支点軸１５に軸着される後部よりも先端爪６ａ側の部位に、油圧シリンダ等で構成される爪開閉用シリンダ２３の一端２３ａが軸着されており、爪開閉用シリンダ２３の他端２３ｂが、ホルダ１４の上爪支点軸１５よりも後側の部位に軸着される。爪開閉用シリンダ２３は、上爪６を回動させる上爪６駆動機構として働く。他の掴み具５の基本構造及び磁石装置１の取付構造は前記図２〜図４の実施形態と同様であり、対応する部分には同一符号を付しておく。本例においても、上爪６と下爪７の最大開き角度θを１８０°以上とすることができるので、図９の仮想線で示すように、パワーショベル３０の近くで掴み作業を行なっている場合或いは、図９の実線で示すように、遠く離れた位置で掴み作業を行なっている場合のいずれの場合も、同じ作業範囲で、掴み操作から吸着操作に切り変えることが可能となり、吸着操作の手間や時間を大幅に削減できる等の効果が得られるものである。   8 and 9 show an embodiment of the hydraulic opening / closing mechanism 8. As shown in FIG. 8, the lower end of the holder 14 is pivotally attached to the tip of the arm 4 of the excavator 30 via the link bracket 21, and the link bracket 22 at the tip of the power link 16 is attached to the upper end of the holder 14. The holder 14 can be rotated around the link bracket 21 by the power link 16 by connecting the rear end side of the power link 16 to the tip of the bucket cylinder 32. The power link 16 in this example serves to rotate the holder 14. Further, the rear portion of the upper claw 6 is pivotally attached to the upper claw fulcrum shaft 15 provided at the front end of the holder 14, and the front claw 6 a side of the rear portion that is pivotally attached to the upper claw fulcrum shaft 15 of the upper claw 6. One end 23a of a claw opening / closing cylinder 23 constituted by a hydraulic cylinder or the like is pivotally attached, and the other end 23b of the claw opening / closing cylinder 23 is pivoted to a portion on the rear side of the upper claw fulcrum shaft 15 of the holder 14. Worn. The claw opening / closing cylinder 23 functions as an upper claw 6 drive mechanism for rotating the upper claw 6. The basic structure of the other gripping tool 5 and the mounting structure of the magnet device 1 are the same as those in the embodiment shown in FIGS. 2 to 4, and the corresponding parts are denoted by the same reference numerals. Also in this example, since the maximum opening angle θ of the upper claw 6 and the lower claw 7 can be 180 ° or more, the gripping work is performed near the power shovel 30 as shown by the phantom line in FIG. In this case, as shown by the solid line in FIG. 9, it is possible to switch from the gripping operation to the suction operation in the same work range in any case where the gripping work is performed at a far away position. It is possible to obtain effects such as greatly reducing labor and time.

前記各実施形態では、磁石装置１の吸着面９ａを上爪６の掴み面１０側に設けた場合を説明したが、下爪７の掴み面１０側に設けてもよく、或いは上爪６と下爪７の両方の掴み面１０側にそれぞれ設けて、吸着される磁性体廃材１３の量を倍増させることも可能である。   In each of the above embodiments, the case where the attracting surface 9a of the magnet device 1 is provided on the gripping surface 10 side of the upper claw 6 has been described. It is also possible to double the amount of the magnetic waste material 13 to be adsorbed by providing it on both gripping surface 10 sides of the lower claw 7 respectively.

また前記各実施形態では、掴み具５として、上爪６と下爪７とを例示したが、もちろんこれに限らず、磁石装置１が設けられない下爪７（或いは上爪６）をバケット（図示せず）で構成してもよいものである。この場合において、磁石付き爪とバケットとの組み合わせとなり、掴み具５の多様化を図ることができる。   Moreover, in each said embodiment, although the upper nail | claw 6 and the lower nail | claw 7 were illustrated as the gripper 5, of course, it is not restricted to this, The lower nail | claw 7 (or upper claw 6) in which the magnet apparatus 1 is not provided is used as a bucket ( (Not shown). In this case, it becomes a combination of a claw with a magnet and a bucket, and the gripping tool 5 can be diversified.

本発明の一実施形態の磁石付き掴み機を１８０°以上開いた状態の側面図である。It is a side view of the state which opened 180 degree or more of the gripping machine with a magnet of one Embodiment of this invention. 同上の磁石付き掴み機をパワーショベルに取り付けた場合の説明図である。It is explanatory drawing at the time of attaching the gripping machine with a magnet same as the above to a power shovel. 同上の磁石装置の取り付け状態の説明図である。It is explanatory drawing of the attachment state of a magnet apparatus same as the above. （ａ）（ｂ）は同上の磁石装置の取り付け手順を説明する斜視図である。(A) (b) is a perspective view explaining the attachment procedure of a magnet apparatus same as the above. 同上の磁石付き掴み機を用いて磁性体廃材を吸着操作する場合の説明図である。It is explanatory drawing in the case of carrying out adsorption | suction operation of a magnetic body waste material using the same gripper with a magnet. 同上の磁性体廃材を上爪と下爪とで掴み操作する場合の一例の説明図である。It is explanatory drawing of an example in the case of gripping and operating the same magnetic waste material with an upper nail and a lower nail. 同上の磁石装置の吸着面を地面に近づけて磁性体廃材を吸着する場合の説明図である。It is explanatory drawing in the case of adsorb | sucking a magnetic waste material by making the attraction | suction surface of a magnet apparatus same as the above close to the ground. 本発明の他の実施形態の磁石付き掴み機の説明図である。It is explanatory drawing of the gripping machine with a magnet of other embodiment of this invention. 図８の磁石装置の吸着面を地面に近づけて磁性体廃材を吸着する場合の説明図である。It is explanatory drawing in the case of attracting | sucking a magnetic body waste material by making the attraction | suction surface of the magnet apparatus of FIG. 8 close to the ground. 従来例の説明図である。It is explanatory drawing of a prior art example. 本発明の参考図である。It is a reference figure of this invention.

符号の説明Explanation of symbols

１ 磁石装置
２ 掴み機
３ 磁石
４ アーム
５ 掴み具
６ 上爪
６ａ 先端爪
６ｂ 後端
７ 下爪
７ａ 先端爪
７ｂ 後端
８ 開閉機構
９ 保護板
９ａ 吸着面
１０ 掴み面
１０ａ 掴み用凹所
１４ ホルダ
１５ 上爪支点軸
１６ パワーリンク
１７ 爪連結軸
１８ 下爪支点軸
１９ 連動リンク
２０ 支持リンク
２１ リンクブラケット
２３ 爪開閉用シリンダ
２５ 磁石収納凹部
２６ 突起部
θ 最大開き角度 DESCRIPTION OF SYMBOLS 1 Magnet apparatus 2 Grasp machine 3 Magnet 4 Arm 5 Grasping tool 6 Upper nail 6a Tip nail 6b Rear end 7 Lower nail 7a Tip nail 7b Rear end 8 Opening / closing mechanism 9 Protection plate 9a Adsorption surface 10 Grip surface 10a Gripping recess 14 Holder 15 upper claw fulcrum shaft 16 power link 17 claw coupling shaft 18 lower claw fulcrum shaft 19 interlocking link 20 support link 21 link bracket 23 claw opening / closing cylinder 25 magnet housing recess 26 projection portion θ maximum opening angle

Claims (5)

建設機械のアームの先端に開閉自在に設けられる掴み具を上爪と下爪とで構成し、上爪と下爪とを連動して開閉させる開閉機構を備えた磁石付き掴み機において、上記開閉機構は、建設機械のアームの先端にホルダを軸着し、ホルダの先端に設けられる上爪支点軸に上爪の後部を軸着し、上爪の上爪支点軸よりも先端爪側の部位に建設機械のパワーリンクの先端を軸着し、上爪の上爪支点軸よりも後端側の爪連結軸に下爪の後端を軸着し、下爪の後端よりも先端爪側に設けた下爪支点軸に連動リンクの一端を軸着し、連動リンクの他端をホルダの上爪支点軸よりも後側の部位に軸着し、ホルダの上爪支点軸よりも後側において、ホルダ又はアームの少なくとも一方に支持リンクの一端を軸着すると共に、支持リンクの他端をパワーリンクの後端側に軸着して構成し、上記パワーリンクにより上爪が上爪支点軸を中心に開かれると同時に、下爪の下爪支点軸が連動リンクに引っ張られて下爪が爪連結軸を中心に開かれる際に、爪連結軸が上爪支点軸と下爪支点軸とを結ぶ線よりも前方に移動することで、上爪と下爪の最大開き角度が１８０°以上となるように構成されており、上爪と下爪の少なくとも一方に磁石装置を設けると共に、磁石装置の吸着面を爪の掴み面側に位置させ、磁石装置が設けられる爪の掴み面において、磁石装置の吸着面と爪の先端爪との間に吸着面よりも凹曲状に窪んだ掴み用凹所を設けると共に、掴み用凹所と吸着面との境界部に吸着面よりも僅かに凸状に突出した突起部を突設させたことを特徴とする磁石付き掴み機。 The jaws provided openably on the tip of a construction machine arm constituted by an upper claw and a lower claw in the upper pawls and the magnet with gripping equipped with a closing mechanism for interlocking with opening and closing the lower claws, the opening and closing The mechanism is such that the holder is pivotally attached to the tip of the arm of the construction machine, the rear portion of the upper claw is pivotally attached to the upper claw fulcrum shaft provided at the tip of the holder, and the portion on the front claw side of the upper claw fulcrum shaft Attach the tip of the power link of the construction machine to the upper nail, and attach the rear end of the lower nail to the nail coupling shaft on the rear end side of the upper nail fulcrum shaft, and the front nail side of the rear end of the lower nail One end of the interlocking link is pivotally attached to the lower claw fulcrum shaft provided on the holder, and the other end of the interlocking link is pivotally attached to the rear side of the upper claw fulcrum shaft of the holder, and the rear side of the upper claw fulcrum shaft of the holder In this case, one end of the support link is pivotally attached to at least one of the holder or the arm, and the other end of the support link is placed after the power link. The upper claw is opened around the upper claw fulcrum shaft by the power link, and at the same time, the lower claw fulcrum shaft is pulled by the interlocking link and the lower claw is centered on the claw coupling shaft. The claw coupling shaft moves forward from the line connecting the upper claw fulcrum shaft and the lower claw fulcrum shaft when it is opened, so that the maximum opening angle of the upper claw and the lower claw is 180 ° or more. The magnet device is provided on at least one of the upper claw and the lower claw, the suction surface of the magnet device is positioned on the grip surface side of the claw, and the grip surface of the claw on which the magnet device is provided A gripping recess that is recessed more concavely than the suction surface is provided between the claw and the tip of the nail, and the boundary between the gripping recess and the suction surface protrudes slightly more convex than the suction surface A magnet-equipped gripping machine characterized in that a protruding portion is provided . 建設機械のアームの先端に開閉自在に設けられる掴み具を上爪と下爪とで構成し、上爪と下爪とを連動して開閉させる開閉機構を備えた磁石付き掴み機において、上記開閉機構は、建設機械のアームの先端にリンクブラケットを介してホルダを軸着すると共に、建設機械のパワーリンクによりホルダをリンクブラケットを中心に回動可能とし、ホルダの先端に設けられる上爪支点軸に上爪の後部を軸着し、上爪の上爪支点軸よりも先端爪側の部位に、爪開閉用シリンダの一端を軸着し、爪開閉用シリンダの他端をホルダの上爪支点軸よりも後側の部位に軸着し、上爪の上爪支点軸よりも後端側の爪連結軸に下爪の後端を軸着し、下爪の後端よりも先端爪側に設けた下爪支点軸に連動リンクの一端を軸着すると共に、連動リンクの他端をホルダの上爪支点軸よりも後側の部位に軸着して構成し、上記爪開閉用シリンダにより上爪が上爪支点軸を中心に開かれると同時に、下爪の下爪支点軸が連動リンクに引っ張られて下爪が爪連結軸を中心に開かれる際に、爪連結軸が上爪支点軸と下爪支点軸とを結ぶ線よりも前方に移動することで、上爪と下爪の最大開き角度が１８０°以上となるように構成されており、上爪と下爪の少なくとも一方に磁石装置を設けると共に、磁石装置の吸着面を爪の掴み面側に位置させ、磁石装置が設けられる爪の掴み面において、磁石装置の吸着面と爪の先端爪との間に吸着面よりも凹曲状に窪んだ掴み用凹所を設けると共に、掴み用凹所と吸着面との境界部に吸着面よりも僅かに凸状に突出した突起部を突設させたことを特徴とする磁石付き掴み機。 In a gripping machine with a magnet, which comprises a gripper that can be freely opened and closed at the tip of an arm of a construction machine, and that has an opening and closing mechanism that opens and closes the upper and lower claws in conjunction with each other. The mechanism pivots the holder on the tip of the arm of the construction machine via a link bracket, and the holder can be rotated around the link bracket by the power link of the construction machine, and the upper claw fulcrum shaft provided at the tip of the holder Attach the rear part of the upper claw to the top claw, attach one end of the claw opening / closing cylinder to the tip claw side of the upper claw upper claw fulcrum shaft, and attach the other end of the claw opening / closing cylinder to the upper claw fulcrum of the holder Attached to the rear side of the shaft, the rear end of the lower nail is attached to the nail coupling shaft on the rear end side of the upper nail fulcrum shaft of the upper nail, and the front nail side of the rear end of the lower nail Attach one end of the interlocking link to the provided lower claw fulcrum shaft and attach the other end of the interlocking link to the holder The upper claw is opened around the upper claw fulcrum shaft by the claw opening / closing cylinder and at the same time the lower claw lower claw fulcrum shaft is connected to the interlocking link. When the lower claw is pulled and opened around the claw coupling axis, the claw coupling axis moves forward from the line connecting the upper claw fulcrum axis and the lower claw fulcrum axis, so that The opening angle is configured to be 180 ° or more. A magnet device is provided on at least one of the upper claw and the lower claw, and the magnet device is provided by positioning the attracting surface of the magnet device on the gripping surface side of the claw. In the gripping surface of the nail, a gripping recess that is recessed more concavely than the suction surface is provided between the suction surface of the magnet device and the tip of the nail, and at the boundary between the gripping recess and the suction surface A gripping machine with magnets , characterized in that a protruding portion that protrudes slightly convex from the attracting surface is provided . 上記磁石装置は、爪の掴み面側に開口する磁石収納凹部内に収納される磁石と、磁石収納凹部の開口面を遮蔽する保護板とを備えていることを特徴とする請求項１又は請求項２記載の磁石付き掴み機。 2. The magnet device according to claim 1, further comprising: a magnet housed in a magnet housing recess that opens to a gripping surface side of the claw; and a protective plate that shields the opening surface of the magnet housing recess. Item 3. A gripper with magnet according to item 2 . 磁石装置が設けられる爪の掴み面において、磁石装置の吸着面を平坦に形成すると共に、該平坦な吸着面の延長線上に爪の先端爪を位置させたことを特徴とする請求項１乃至請求項３のいずれかに記載の磁石付き掴み機。 The gripping surface of the claw in which the magnet device is provided, the suction surface of the magnet device is formed flat, and the tip claw of the claw is positioned on an extension line of the flat suction surface. Item 4. A gripper with a magnet according to any one of Items 3 to 4 . 磁石装置が設けられない上爪又は下爪のいずれか一方がバケットであることを特徴とする請求項１乃至請求項４のいずれかに記載の磁石付き掴み機。 The gripping machine with a magnet according to any one of claims 1 to 4, wherein any one of an upper claw and a lower claw not provided with a magnet device is a bucket .

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