JPH02303684A - Method and device for magnetically attracting and feeding welding nut - Google Patents

Method and device for magnetically attracting and feeding welding nut

Info

Publication number
JPH02303684A
JPH02303684A JP12401489A JP12401489A JPH02303684A JP H02303684 A JPH02303684 A JP H02303684A JP 12401489 A JP12401489 A JP 12401489A JP 12401489 A JP12401489 A JP 12401489A JP H02303684 A JPH02303684 A JP H02303684A
Authority
JP
Japan
Prior art keywords
spindle
magnetic
tip
permanent magnet
present
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12401489A
Other languages
Japanese (ja)
Inventor
Yoshio Okabe
義雄 岡部
Nobusuke Horikawa
堀川 圓佐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dengensha Toa Co Ltd
Original Assignee
Dengensha Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dengensha Manufacturing Co Ltd filed Critical Dengensha Manufacturing Co Ltd
Priority to JP12401489A priority Critical patent/JPH02303684A/en
Publication of JPH02303684A publication Critical patent/JPH02303684A/en
Pending legal-status Critical Current

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  • Branching, Merging, And Special Transfer Between Conveyors (AREA)
  • Feeding Of Articles To Conveyors (AREA)

Abstract

PURPOSE:To increase the magnetic attraction force generated on the tip surface of a spindle and to automatically feed even a small part with heavy weight by concentrating magnetic flux generated on the spindle on the tip of the spindle by a magnetic member. CONSTITUTION:Permanent magnets 8 and 8 and auxiliary yorks 9a and 9b made of magnetic material are provided so as to form a magnetic circuit with the spindle 7 on the position where the tip of the spindle 7 intersects a detention receiving tool 3. By this method, coupling of the magnetic circuit among the permanent magnets 8 and 8 and the auxiliary yorks 9a and 9b, and the spindle 7 with the magnetic material having permeability far higher than in the air becomes closer and the magnetic force increases remarkably. Accordingly, even the part with heavy weight can be fed stably.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は溶接ナツト選別機からシュートに沿って一定の
向きに整列送給される溶接ナットを一個づつスポット溶
接機の電極位置に送給するための溶接ナツト自動送給装
置に関し、とくに、スピンドルの先端に溶接ナットを吸
着して送給する方式において、スピンドル先端に発生す
る磁気吸引力を強力に増大せしめることができる送給装
置に関する。
[Detailed Description of the Invention] (Industrial Application Field) The present invention involves feeding welding nuts that are aligned and fed in a fixed direction along a chute from a welding nut sorter one by one to the electrode position of a spot welding machine. The present invention relates to an automatic welding nut feeding device for use in the industry, and particularly relates to a feeding device that can strongly increase the magnetic attraction force generated at the spindle tip in a system that feeds the welding nut by attracting it to the tip of the spindle.

(従来の技術) スピンドルを永久磁石で磁化することによってそのスピ
ンドルの先端面において小物部品を吸着して、目的位置
へ供給する溶接ナフト送給装置は特公昭56−1013
4号公報により明らかなように、その吸着力を発生する
永久磁石とスピンドルのみで磁気回路を構成している。
(Prior Art) A welding naphof feeding device which magnetizes a spindle with a permanent magnet, attracts small parts at the tip of the spindle, and supplies the small parts to a target position is disclosed in Japanese Patent Publication No. 56-1013.
As is clear from Publication No. 4, a magnetic circuit is composed only of a permanent magnet that generates the attraction force and a spindle.

(発明が解決しようとする課題) しかしながら、永久磁石の磁束をスピンドルに集磁する
この方式は、永久磁石からスピンドル先端までの距離を
長くすると、スピンドルがそのストロークエイドまで到
達する区間では磁気吸引力が弱まり、比較的自重の大き
い部品になると途中で落下する恐れがあった。
(Problem to be Solved by the Invention) However, in this method of concentrating the magnetic flux of a permanent magnet onto the spindle, if the distance from the permanent magnet to the tip of the spindle is increased, the magnetic attraction force will be generated in the section where the spindle reaches its stroke aid. There was a risk that parts with relatively large weight would fall midway through the process.

本発明はかかる問題を解決するためになされたもので、
永久磁石から発生する磁束を有効にスピンドルの先端面
に集磁させ、スピンドル先端面の磁気吸着力を増大せし
めて、重量物の安定した送給を可能ならしめるものであ
る。
The present invention was made to solve such problems,
The magnetic flux generated from the permanent magnet is effectively concentrated on the tip surface of the spindle, increasing the magnetic attraction force on the tip surface of the spindle, thereby making it possible to stably feed heavy objects.

(課題を解決するための手段) 上記の目的を達成するために本発明は永久磁石と磁気的
に結合した磁性部材をスピンドルの往復路付近に配置し
、しかもこの磁性部材には上記の磁石とは別の永久磁石
を配置し、これら複数の永久磁石からの磁束を有効にス
ピンドルに集磁させるようにしてスピンドル先端の吸引
力を強力に増大せてめたものである。
(Means for Solving the Problems) In order to achieve the above object, the present invention disposes a magnetic member magnetically coupled with a permanent magnet near the reciprocating path of the spindle, and furthermore, this magnetic member has a magnetic member that is magnetically coupled with a permanent magnet. In this case, another permanent magnet is arranged, and the magnetic flux from the plurality of permanent magnets is effectively concentrated on the spindle, thereby strongly increasing the attractive force at the tip of the spindle.

(作用) そして、本発明装置では、複数の永久磁石から発生する
磁束を、スピンドル先端の吸着面に有効に集磁すること
ができ、重量の大きい小物部品でも安定して送給するこ
とができる。
(Function) In the device of the present invention, the magnetic flux generated from the plurality of permanent magnets can be effectively concentrated on the attraction surface of the spindle tip, and even small parts with large weight can be stably fed. .

また、本発明装置によれば、スピンドルの前進する往路
にそって複数の永久磁石と磁気的に結合した磁性部材を
取りつけるだけであるから、構造が簡単でしかも既存の
装置にも安価に取りつけることができる。
In addition, according to the device of the present invention, the magnetic member magnetically coupled to a plurality of permanent magnets is simply attached along the forward path of the spindle, so the structure is simple and it can be attached to existing devices at low cost. I can do it.

(実施例) 以下、図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

この部品送給装置1は、上方にある選別機(図省略)か
らシュート2をとおりヒンジ板等の係止受け具3により
一時停止せしめた小物部品4を、スポット溶接機の上下
電極5.5′間に、その傾斜上方より電極5′の上面に
対向して流体圧シリンダ6の動作に伴って往復運動する
スピンドル7の先端面に保持し、前記スピンドル7を前
進させることにより、次々と組みつけ位置に供給する。
This parts feeding device 1 transports small parts 4 from a sorter (not shown) located above through a chute 2 and temporarily stopped by a locking receiver 3 such as a hinge plate to upper and lower electrodes 5.5 of a spot welding machine. ', the electrode 5' is held on the tip surface of a spindle 7 that moves reciprocatingly with the operation of the fluid pressure cylinder 6 from above the sloping side of the electrode 5', and the spindle 7 is moved forward, thereby assembling the electrode 5' one after another. Supply it to the found position.

その構造と原理は前記スピンドル7の先頭部7aは軟鋼
材等の磁性部材からなり、またその後部部7bはステン
レス等の非磁性部材から構成されている。そして、前記
スピンドル7の先端と係止受け具3の交差する位置にお
いて、スピンドル7と磁気回路を構成するように永久磁
石8.8と、磁性材からなる補助ヨーク9a、9bが設
けられており、この補助ヨークの先端には別の永久磁石
10が配置されている。これら複数の永久磁石8.10
と補助ヨーク9a、9bとの間をスピンドル7が通過す
るときに、通過するスピンドルの先頭部7aは磁化せし
められて、その先端面に溶接ナツトなどの小物部品4を
吸着・保持する。そして、流体シリンダ6によるスピン
ドル7の前進によって、小物部品4が第1図に示すよう
に、電極5の上面に移動到達したときに、上記スピンド
ルの先頭部7aが永久磁石8.8の間を通過してスピン
ドルの後頭部7bが上記の磁界区域を通るようになって
、スピンドルの先頭部7aが磁界区域から脱して磁力を
消失させ、小物部品4を電極5の被溶接板Wへ自重落下
させることになる。
The structure and principle of the spindle 7 is such that the front end 7a of the spindle 7 is made of a magnetic material such as mild steel, and the rear part 7b is made of a non-magnetic material such as stainless steel. A permanent magnet 8.8 and auxiliary yokes 9a and 9b made of magnetic material are provided at the intersection of the tip of the spindle 7 and the locking receiver 3 to form a magnetic circuit with the spindle 7. , another permanent magnet 10 is arranged at the tip of this auxiliary yoke. These multiple permanent magnets 8.10
When the spindle 7 passes between the auxiliary yokes 9a and 9b, the leading end 7a of the passing spindle is magnetized and attracts and holds a small part 4 such as a welding nut on the leading end surface. As the spindle 7 is advanced by the fluid cylinder 6, when the small part 4 moves and reaches the upper surface of the electrode 5 as shown in FIG. After passing through, the rear head 7b of the spindle comes to pass through the above magnetic field area, and the front head 7a of the spindle escapes from the magnetic field area and loses the magnetic force, causing the small part 4 to fall under its own weight to the plate W to be welded of the electrode 5. It turns out.

この小物部品を送給する際に、第3図に示す従来方式は
、永久磁石8で発生する磁束は空気中に漏れる磁束が多
く、スピンドル先端の吸着面に有効に集磁することがで
きず、重量の大きい小物部品は途中で落下することがあ
る。
When feeding these small parts, in the conventional method shown in Figure 3, a lot of the magnetic flux generated by the permanent magnet 8 leaks into the air and cannot be effectively concentrated on the attracting surface at the tip of the spindle. , heavy small parts may fall on the way.

これに対し、本発明方法は第4図に示すように、複数の
永久磁石8.8と磁気的に結合・された磁性部材からな
る補助ヨーク9a、9bに、さらに永久磁石10.10
を配置することで、空気中よりも透磁率のはるかに大き
い磁性材に永久磁石8.10及び補助ヨーク9a、9b
とスピンドル7との間の磁気回路の結合は密になり、そ
の磁力は第3図の従来方式と較べ著しく増大する。した
がって、重量の大きい部品でも安定して供給することが
できる。
On the other hand, the method of the present invention, as shown in FIG.
By arranging the permanent magnet 8.10 and the auxiliary yokes 9a, 9b in a magnetic material with much higher magnetic permeability than in air.
The coupling of the magnetic circuit between the spindle 7 and the spindle 7 becomes tighter, and the magnetic force is significantly increased compared to the conventional system shown in FIG. Therefore, even heavy parts can be stably supplied.

第5図は実験により従来方式と本発明方式によるスピン
ドル先端の磁束密度をスピンドルのストローク変位に応
じて実測したデータの推移を比較したグラフである。
FIG. 5 is a graph comparing the changes in the data obtained by experimentally measuring the magnetic flux density at the tip of the spindle according to the stroke displacement of the spindle according to the conventional method and the method of the present invention.

スピンドル往路付近に配置した補助ヨークの先端に永久
磁石を配置した場合のスピンドル先端の磁束密度は、従
来方式に較ベスピンドルの最大ストロークにおいて約5
倍増大している。
When a permanent magnet is placed at the tip of the auxiliary yoke placed near the outgoing path of the spindle, the magnetic flux density at the tip of the spindle is approximately 5 at the maximum stroke of the base spindle compared to the conventional method.
It has doubled.

なお、永久磁石10を補助ヨーク9a、9bに対し相対
移動させることによって、磁束密度の最大値P(ピーク
点)をスピンドルのストローク量に合わせそ移動、変化
させることができる。
By moving the permanent magnet 10 relative to the auxiliary yokes 9a and 9b, the maximum value P (peak point) of the magnetic flux density can be moved and changed in accordance with the stroke amount of the spindle.

(発明の効果) 以上、本発明によれば、磁性材からなる補助ヨークの先
端にさらに別の永久磁石を配置したから、永久磁石から
発生する磁束を、スピンドル先端の吸着面に有効に集磁
することができ、重量の大きい小物部品でも自動送給す
ることができる。
(Effects of the Invention) As described above, according to the present invention, since another permanent magnet is arranged at the tip of the auxiliary yoke made of magnetic material, the magnetic flux generated from the permanent magnet is effectively collected on the attracting surface of the spindle tip. Even small parts with large weights can be automatically fed.

また、本発明装置によれば、スピンドルの前進する往路
にそって複数の永久磁石と磁気的に結合した磁性部材を
取りつけるだけであるから、構造が簡単でしかも既存の
装置にも安価に取りつけることができる。
In addition, according to the device of the present invention, the magnetic member magnetically coupled to a plurality of permanent magnets is simply attached along the forward path of the spindle, so the structure is simple and it can be attached to existing devices at low cost. I can do it.

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

第1図は本発明方法を実施するための一実施例を示す溶
接ナフト送給装置の要部断面図。第2図は第1図n−n
矢視断面拡大図。第3図は従来方式の原理図。第4図は
本発明方式の原理図。第5図は実験により従来方式と本
発明方式によるスピンドル先端の磁束密度をスピンドル
のストローク変位に応じて実測したデータの推移を比較
したグラフ。 〔符号の説明〕 2・・・シュート 3・・・係止手段 6・・・流体圧
シリンダ 7・・・スピンドル 8.10・・・永久磁
石 9a、9b・・・磁性部材(補助ヨーク)べ1.X
″L全駅匁Q国護釉屈 □ (キロ\J:Xべ) 第2図 手続主甫正書(方式) %式% 2、発明の名称 溶接ナット磁気吸着送給方法及び装置 3、補正をする者 事件との関係 特許出願人 住所 神奈川県用崎市多摩区枡形1丁目23番1号 平成1年8月29日発送日 願書を対象に補正指令がかかりましたが、別紙のとおり
明細書全文を補正し、願書の「発明の名称」及び「請求
項の数」と一致させますので、受明糸田書 1、発明の名称 溶接ナツト磁気吸着送給方法及び装置 2、特許請求の範囲 1、溶接ナツトを所定のナツト停止位置で受け止め、そ
の停止位置の上方から目的位置に向かって前進するスピ
ンドルを磁化し、前記停止位置の溶接ナツトをスピンド
ル先端面に吸着・保持し、スピンドル先端が目的位置に
到達したとき、そのスピンドル先端面の磁力を消失させ
てスピンドルから溶接ナツトを離脱させる溶接す7ト送
給方法において、前記スピンドルの先端がナツト停止位
置から前進する際、スピンドルに発生する磁束を、磁性
部材によってスピンドル先端に集磁し、スピンドル先端
面に発生する磁気吸引力を増大せしめたことを特徴とす
る溶接ナフト送給方法。 2、溶接ナットを連続的に整列して送るシュートと、こ
のシュート終端にて溶接ナットを受け止める係止手段と
、この係止手段の上方から目的位置に向けて前進するス
ピンドルを含む流体圧シリンダとを有し、前記スピンド
ルの往復路付近に、前記スピンドルが磁気回路の一部を
構成し得る永久磁石と磁気的に結合された磁性部材を配
置した溶接ナツト磁気吸着送給装置。 3、発明の詳細な説明 (産業上の利用分野) 本発明は溶接ナツト選別機からシュートに沿って一定の
向きに整列送給される溶接ナットを一個づつスポット溶
接機の電極位置に送給するための溶接ナツト自動送給方
法・装置に関し、とくに、スピンドルの先端に溶接ナツ
トを吸着して送給する方式において、スピンドル先端に
発生する磁気吸引力を増大せしめる方法及び装置に関す
る。 (従来の技術) スピンドルを永久磁石で磁化することによってそのスピ
ンドルの先端面において小物部品を吸着して、目的位置
へ供給する溶接ナツト送給装置は特公昭56−1013
4号公報により明らかなように、その吸着力を発生する
永久磁石とスピンドルのみで磁気回路を構成している。 (発明が解決しようとする課題) しかしながら、永久磁石の磁束をスピンドルに集磁する
この方式は、永久磁石からスピンドル先端までの距離を
長くすると、スピンドルがそのストロークエンドまで到
達する区間では磁気吸引力が弱まり、比較的自重の大き
い部品になると途中で落下する恐れがあった。 本発明はかかる問題を解決するためになされたもので、
永久磁石から発生する磁束を有効にスピンドルの先端面
に集磁させ、スピンドル先端面の磁気吸着力を増大せし
めて、重量物の安定した送給を可能4らしめるものであ
る。 (課題を解決するための手段) 上記の目的を達成するために本発明は永久磁石と磁気的
に結合した磁性部材をスピンドルの往復路付近に配置し
、永久磁石からの磁束を有効にスピンドルに集磁させる
ようにしてスピンドル先端の吸引力を増大せてめたもの
である。 (作用) そして、本発明の方法では、永久磁石から発生する磁束
を、スピンドル先端の吸着面に有効に集磁することがで
き、重量の大きい小物部品でも安定して送給することが
できる。 また、本発明装置によれば、スピンドルの前進する往路
にそって永久磁石と磁気的に結合した磁性部材を取りつ
けるだけであるから、構造が簡単でしかも既存の装置に
も安価に取りつけることができる。 (実施例) 以下、図面を参照して本発明の詳細な説明する。 この部品送給装置1は、上方にある選別機(図省略)か
らシュート2をとおリヒンジ板等の係止受け具3により
一時停止せしめた小物部品4を、スポット溶接機の上下
電極5.5′間に、その傾斜上方より電極5′の上面に
対向して流体圧シリンダ6の動作に伴って往復運動する
スピンドル7の先端面に保持し、前記スピンドル7を前
進させ唇ことにより、次々と組みつけ位置に供給する。 その構造と原理は前記スピンドル7の先頭部7aは軟鋼
材等の磁性部材からなり、またその後部部7bはステン
レス等の非磁性部材から構成されている。そして、前記
スピンドル7の先端と係止受け具3の交差する位置にお
いて、スピンドル7と磁気回路を構成するように永久磁
石8.8及び磁性材からなる補助ヨーク9a、9bが設
けられており、永久磁石及び補助ヨーク9a、9bの間
を通過するスピンドルの先頭部7aは磁化せしめられて
、その先端面に溶接ナツトなどの小物部品4を吸着・保
持すると共に、流体シリンダ6によるスピンドル7の前
進によって、小物部品4が第り図に示すように、電極5
の上面に移動到達したときに、上記スピンドルの先頭部
7aが永久磁石8.8の間を通過してスピンドルの後頭
部7bが上記の磁界区域を通るようになって、スピンド
ルの先頭部が磁界区域から脱して磁力を消失させ、小物
部品4を電極5の被溶接板Wへ自重落下させることにな
る。 、この小物部品を送給する際に、第3図に示す従来方式
は、永久磁石8で発生する磁束は空気中に漏れる磁束が
多く、スピンドル先端の吸着面に有効に集磁することが
できず、重量の大きい小物部品は途中で落下することが
ある。 これに対し、本発明方法は第4図に示すように、永久磁
石8と磁気的に結合された磁性部材からなる補助ヨーク
9a、9aを配置すると、空気中よりも透磁率のはるか
に大きい磁性材に永久磁石8及び補助ヨーク9a、9b
とスピンドル7との間の磁気回路の結合は密になり、そ
の磁力は第3図の従来方式と較べ著しく増大する。した
がって、重量の大きい部品も安定して供給することがで
きる。 第5図は実験により従来方式と本発明方式によるスピン
ドル先端の磁束密度をスピンドルのストローク変位に応
じて実測したデータの推移を比較したグラフである。 補助ヨーク9a、9bをスピンドル往路付近に配置した
場合のスピンドル先端の磁束密度は、従来方式に較ベス
ピンドルの最大ストロークにおいて約1.5倍増大して
いる。 (発明の効果) 以上、本発明の方法によれば、永久磁石から発生する磁
束を、スピンドル先端の吸着面に有効に集磁することが
でき、重量の大きい小物部品でも自動送給することがで
きる。 また、本発明装置によれば、スピンドルの前進する往路
にそって永久磁石と磁気的に結合した磁性部材を取りつ
けるだけであるから、構造が簡単でしかも既存の装置に
も安価に取りつけることができる。 4、図面の簡単な説明 第1図は本発明方法を実施するための一実施例を示す溶
接ナフト送給装置の要部断面図。第2図は第1図n−n
矢視断面拡大図、第3図は従来方式の原理図、第4図は
本発明方式の原理図。第5図は実験により従来方式と本
発明方式によるスピンドル先端の磁束密度をスピンドル
のストローク変位に応じて実測したデータの推移を比較
したグラフ。 〔符号の説明〕
FIG. 1 is a sectional view of a main part of a welding naphof feeding device showing an embodiment for carrying out the method of the present invention. Figure 2 is Figure 1 n-n
Enlarged cross-sectional view in the direction of arrows. Figure 3 is a diagram of the principle of the conventional method. FIG. 4 is a diagram showing the principle of the method of the present invention. FIG. 5 is a graph comparing the changes in the data obtained by experimentally measuring the magnetic flux density at the tip of the spindle according to the stroke displacement of the spindle according to the conventional method and the method according to the present invention. [Explanation of symbols] 2... Chute 3... Locking means 6... Fluid pressure cylinder 7... Spindle 8.10... Permanent magnet 9a, 9b... Magnetic member (auxiliary yoke) base 1. X
″L whole station momme Q national protection glaze bend □ (kilometer \ J: Relation to the case of a person who does The entire text of the document has been amended to match the "title of the invention" and "number of claims" in the application, so the following documents are included: Accepted Itoda Letter 1, Title of the Invention: Welding Nut Magnetic Adsorption Feeding Method and Apparatus 2, Scope of Claims 1. Receive the welding nut at a predetermined nut stop position, magnetize the spindle that advances from above the stop position toward the target position, and attract and hold the weld nut at the stop position to the spindle tip surface, so that the spindle tip In the welding nut feeding method in which the welding nut is separated from the spindle by dissipating the magnetic force on the spindle tip surface when the target position is reached, when the tip of the spindle moves forward from the nut stop position, a phenomenon occurs in the spindle. A welding naphof feeding method characterized in that magnetic flux is concentrated at the spindle tip using a magnetic member to increase the magnetic attraction force generated on the spindle tip surface. 2. A fluid pressure cylinder including a chute for continuously arranging and feeding welding nuts, a locking means for receiving the welding nuts at the end of the chute, and a spindle that advances from above the locking means toward a target position. A welding nut magnetic adsorption/feeding device comprising: a magnetic member magnetically coupled to a permanent magnet that can constitute a part of a magnetic circuit of the spindle, disposed near the reciprocating path of the spindle. 3. Detailed Description of the Invention (Field of Industrial Application) The present invention involves feeding welding nuts that are aligned and fed in a fixed direction along a chute from a welding nut sorter one by one to the electrode position of a spot welding machine. The present invention relates to a method and device for automatically feeding welding nuts, and in particular to a method and device for increasing the magnetic attraction force generated at the tip of the spindle in a system in which the welding nut is attracted to the tip of the spindle and fed. (Prior art) A welding nut feeding device that magnetizes a spindle with a permanent magnet, attracts small parts at the tip of the spindle, and supplies the small parts to a target position is disclosed in Japanese Patent Publication No. 56-1013.
As is clear from Publication No. 4, a magnetic circuit is composed only of a permanent magnet that generates the attraction force and a spindle. (Problem to be solved by the invention) However, in this method of concentrating the magnetic flux of a permanent magnet onto a spindle, if the distance from the permanent magnet to the tip of the spindle is increased, the magnetic attraction force will be generated in the section where the spindle reaches the end of its stroke. There was a risk that parts with relatively large weight would fall midway through the process. The present invention was made to solve such problems,
The magnetic flux generated from the permanent magnet is effectively concentrated on the tip surface of the spindle, increasing the magnetic adsorption force of the spindle tip surface, thereby making it possible to stably feed heavy objects. (Means for Solving the Problems) In order to achieve the above object, the present invention arranges a magnetic member magnetically coupled with a permanent magnet near the reciprocating path of the spindle, and effectively directs the magnetic flux from the permanent magnet to the spindle. The attraction force at the tip of the spindle is increased by concentrating the magnets. (Function) In the method of the present invention, the magnetic flux generated from the permanent magnet can be effectively concentrated on the attracting surface of the spindle tip, and even small parts with large weight can be stably fed. Furthermore, according to the device of the present invention, the magnetic member magnetically coupled to the permanent magnet is simply attached along the forward path of the spindle, so the structure is simple and it can be installed at low cost in existing devices. . (Example) Hereinafter, the present invention will be described in detail with reference to the drawings. This parts feeding device 1 feeds small parts 4 from a sorter (not shown) located above through a chute 2 and temporarily stopped by a locking receiver 3 such as a rehinge plate to upper and lower electrodes 5.5 of a spot welding machine. ', the electrode 5' is held on the tip surface of a spindle 7 that moves reciprocatingly with the operation of the fluid pressure cylinder 6 from above the sloping side of the electrode 5'. Supply to the assembly position. The structure and principle of the spindle 7 is such that the front end 7a of the spindle 7 is made of a magnetic material such as mild steel, and the rear part 7b is made of a non-magnetic material such as stainless steel. A permanent magnet 8.8 and auxiliary yokes 9a and 9b made of magnetic material are provided at the intersection of the tip of the spindle 7 and the locking receiver 3 to form a magnetic circuit with the spindle 7. The leading end 7a of the spindle passing between the permanent magnet and the auxiliary yokes 9a and 9b is magnetized, attracting and holding small parts 4 such as welding nuts on the leading end surface, and allowing the fluid cylinder 6 to move the spindle 7 forward. Accordingly, the small part 4 is connected to the electrode 5 as shown in FIG.
When reaching the upper surface, the leading end 7a of the spindle passes between the permanent magnets 8.8 and the rear end 7b of the spindle passes through the magnetic field area, so that the leading end of the spindle passes through the magnetic field area. The magnetic force is removed from the magnetic field, causing the small component 4 to fall under its own weight onto the plate W of the electrode 5 to be welded. When feeding these small parts, in the conventional method shown in Fig. 3, much of the magnetic flux generated by the permanent magnet 8 leaks into the air and cannot be effectively concentrated on the attracting surface at the tip of the spindle. First, small parts with a large weight may fall on the way. On the other hand, the method of the present invention, as shown in FIG. permanent magnet 8 and auxiliary yokes 9a, 9b
The coupling of the magnetic circuit between the spindle 7 and the spindle 7 becomes tighter, and the magnetic force is significantly increased compared to the conventional system shown in FIG. Therefore, even heavy parts can be stably supplied. FIG. 5 is a graph comparing the changes in the data obtained by experimentally measuring the magnetic flux density at the tip of the spindle according to the stroke displacement of the spindle according to the conventional method and the method of the present invention. When the auxiliary yokes 9a and 9b are arranged near the forward path of the spindle, the magnetic flux density at the tip of the spindle is increased by about 1.5 times at the maximum stroke of the base spindle compared to the conventional system. (Effects of the Invention) As described above, according to the method of the present invention, the magnetic flux generated from the permanent magnet can be effectively concentrated on the attraction surface of the spindle tip, and even small parts with large weight can be automatically fed. can. Furthermore, according to the device of the present invention, the magnetic member magnetically coupled to the permanent magnet is simply attached along the forward path of the spindle, so the structure is simple and it can be installed at low cost in existing devices. . 4. Brief Description of the Drawings FIG. 1 is a sectional view of essential parts of a welding napht feeding device showing one embodiment for carrying out the method of the present invention. Figure 2 is Figure 1 n-n
3 is a diagram showing the principle of the conventional method, and FIG. 4 is a diagram showing the principle of the method of the present invention. FIG. 5 is a graph comparing the changes in the data obtained by experimentally measuring the magnetic flux density at the tip of the spindle according to the stroke displacement of the spindle according to the conventional method and the method according to the present invention. [Explanation of symbols]

Claims (1)

【特許請求の範囲】[Claims] 溶接ナットを連続的に整列して送るシュートと、このシ
ュート終端にて溶接ナットを受け止める係止手段と、こ
の係止手段の上方から目的位置に向けて前進するスピン
ドルを含む流体圧シリンダとを有し、前記スピンドルの
往復路付近に、前記スピンドルが磁気回路の一部を構成
し得る永久磁石と磁気的に結合された磁性部材を配置し
、しかもこの磁性部材には上記の永久磁石とは別の永久
磁石を配置したことを特徴とする溶接ナット磁気吸着送
給装置。
It has a chute for continuously aligning and feeding the welding nuts, a locking means for receiving the welding nuts at the end of the chute, and a fluid pressure cylinder including a spindle that advances from above the locking means toward a target position. A magnetic member is disposed near the reciprocating path of the spindle, and the spindle is magnetically coupled to a permanent magnet that can form part of a magnetic circuit, and this magnetic member includes a magnetic member that is separate from the permanent magnet. A welding nut magnetic adsorption/feeding device characterized by having a permanent magnet arranged therein.
JP12401489A 1989-05-17 1989-05-17 Method and device for magnetically attracting and feeding welding nut Pending JPH02303684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12401489A JPH02303684A (en) 1989-05-17 1989-05-17 Method and device for magnetically attracting and feeding welding nut

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12401489A JPH02303684A (en) 1989-05-17 1989-05-17 Method and device for magnetically attracting and feeding welding nut

Publications (1)

Publication Number Publication Date
JPH02303684A true JPH02303684A (en) 1990-12-17

Family

ID=14874893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12401489A Pending JPH02303684A (en) 1989-05-17 1989-05-17 Method and device for magnetically attracting and feeding welding nut

Country Status (1)

Country Link
JP (1) JPH02303684A (en)

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