JPH0910956A - Spot welding machine for nut - Google Patents
Spot welding machine for nutInfo
- Publication number
- JPH0910956A JPH0910956A JP18333895A JP18333895A JPH0910956A JP H0910956 A JPH0910956 A JP H0910956A JP 18333895 A JP18333895 A JP 18333895A JP 18333895 A JP18333895 A JP 18333895A JP H0910956 A JPH0910956 A JP H0910956A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- electrode
- movable
- nut
- welding machine
- 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
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば金属板の所定箇
所にナットを溶着するナットのスポット溶接機に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spot welding machine for nuts, for example, for welding nuts at predetermined positions on a metal plate.
【０００２】[0002]
【従来の技術】従来のナットのスポット溶接機として、
先に本出願人が出願した実願平２−４０４４０２号明細
書に記載されたもの、即ち、図４に示すものがあった。
図４において、１は固定電極であり、軸心部にナット１
１のねじ孔に係合し、かつ弾性体により固定電極に対し
て所定量上方に突出するガイドピン２を有する。この固
定電極１の上方に可動電極３を対向配置し、プラスチッ
クからなる絶縁材により筒状に形成されたセンサー４を
上記可動電極３の下部外周に摺動可能に嵌合させ、この
センサー４をコイルバネ５により下方に押圧してその下
端４ａを上記可動電極３よりも所定量下方に突出付勢す
る。８は上記センサー４が可動電極３から下方に突出す
る突出量を所定値に保持するリング状のストッパーであ
り、可動電極３の外周に固定されている。上記センサー
４の上端部の内周にリング状の可動接触片６をねじ込み
固定し、また、可動電極３の外周に可動接触片６の上部
側で対向する筒状の固定接触片７を嵌合固定する。上記
可動接触片６および固定接触片７は、スポット溶接機の
電源を遮断する遮断回路（図示省略）の接点をなし、可
動接触片６が上動して固定接触片７に接触すると、スポ
ット溶接機の電源を遮断するようになっている。As a conventional nut spot welder,
There was one described in the specification of Japanese Patent Application No. 2-404402 filed by the applicant earlier, that is, one shown in FIG.
In FIG. 4, reference numeral 1 is a fixed electrode, and a nut 1 is provided at the center of the shaft.
The guide pin 2 is engaged with the screw hole of No. 1 and protrudes upward by a predetermined amount with respect to the fixed electrode by the elastic body. The movable electrode 3 is disposed above the fixed electrode 1 so as to face each other, and a sensor 4 formed in a cylindrical shape by an insulating material made of plastic is slidably fitted to the lower outer periphery of the movable electrode 3, and the sensor 4 is attached. It is pressed downward by the coil spring 5 to urge the lower end 4a thereof to project downward from the movable electrode 3 by a predetermined amount. Reference numeral 8 denotes a ring-shaped stopper that holds the amount of protrusion of the sensor 4 protruding downward from the movable electrode 3 at a predetermined value, and is fixed to the outer periphery of the movable electrode 3. A ring-shaped movable contact piece 6 is screwed and fixed to the inner circumference of the upper end of the sensor 4, and a cylindrical fixed contact piece 7 facing the upper side of the movable contact piece 6 is fitted to the outer circumference of the movable electrode 3. Fix it. The movable contact piece 6 and the fixed contact piece 7 form a contact of a cutoff circuit (not shown) for cutting off the power source of the spot welding machine, and when the movable contact piece 6 moves upward to contact the fixed contact piece 7, spot welding is performed. The machine's power is cut off.
【０００３】そして、所定箇所に通し孔１０ａが明けら
れた金属板１０、およびこの金属板１０に固着されるナ
ット１１を設け、上記金属板１０を固定電極１の上面に
載置するとともに、その通し孔１０ａを固定電極１のガ
イドピン２に挿通し、ナット１１をシュート（図示省
略）により上記固定電極１が位置する金属板の上面に供
給するとともに、該ナット１１をガイドピン２に嵌合さ
せて位置決めし、次いで可動電極３を下降させて上記ナ
ット１１を下方に押圧した後、通電して該ナット１１を
上記金属板１０に溶着する。A metal plate 10 having a through hole 10a at a predetermined position and a nut 11 fixed to the metal plate 10 are provided, and the metal plate 10 is placed on the upper surface of the fixed electrode 1 and The through hole 10a is inserted into the guide pin 2 of the fixed electrode 1, the nut 11 is supplied to the upper surface of the metal plate on which the fixed electrode 1 is located by a chute (not shown), and the nut 11 is fitted to the guide pin 2. Then, the movable electrode 3 is lowered to press the nut 11 downward, and then the nut 11 is welded to the metal plate 10 by energizing.
【０００４】この場合、上記ナット１１の供給位置が横
方向にずれた場合は、図４の仮想線で示すように、可動
電極３が上記ナット１１に当接する前にセンサー４の下
端がナット１１の上面に当接し、該センサー４が可動電
極３に対して上方に相対移動してその可動接触片６が固
定接触片７に接触し、スポット溶接機の電源、つまり電
極１，３間への通電が遮断され、上記ナット１１の金属
板１０への溶着が阻止される。In this case, when the feeding position of the nut 11 is laterally displaced, the lower end of the sensor 4 is positioned at the lower end of the sensor 4 before the movable electrode 3 abuts on the nut 11, as shown by the phantom line in FIG. Of the spot welding machine, that is, the movable contact piece 6 comes into contact with the fixed contact piece 7 by moving the sensor 4 relative to the movable electrode 3 upwards. The energization is cut off, and the welding of the nut 11 to the metal plate 10 is blocked.
【０００５】[0005]
【発明が解決しようとする課題】上記従来のものは、金
属板１０上に供給されたナット１１が横方向に位置ずれ
した際に金属板１０への溶着が阻止され、この横方向へ
の位置ずれによる不良品の発生を防止することができ
る。しかしながら、上下の電極１，３を複数組み設け、
各上部電極３を同期させて下動させることにより、複数
個のナット１１を同時に金属板１０に溶接する多電極型
のスポット溶接機の場合、何らかの理由で一部の電極間
にナット１１が未供給となっていても、残余の電極間に
ナット１１が正常に供給されていると、これらがそのま
ま溶着されることになる。In the above-mentioned conventional one, when the nut 11 supplied on the metal plate 10 is displaced laterally, the welding to the metal plate 10 is prevented, and the lateral position is prevented. It is possible to prevent the generation of defective products due to misalignment. However, a plurality of upper and lower electrodes 1 and 3 are provided,
In the case of a multi-electrode type spot welder in which a plurality of nuts 11 are simultaneously welded to the metal plate 10 by synchronously moving the upper electrodes 3 downward, the nuts 11 may not be provided between some of the electrodes for some reason. Even if it is supplied, if the nut 11 is normally supplied between the remaining electrodes, these will be welded as they are.
【０００６】このため、上記従来のものは、溶着が完了
する都度ナット１１の未着の有無を点検せねばならず、
手数および心労を要する欠点があった。本発明は一部の
電極間にナット１１の未供給が発生すると、各固定・可
動電極１，３への通電を遮断することにより、上記欠点
を解消した新規なナットのスポット溶接機を得ることを
目的とする。Therefore, in the above-mentioned conventional one, it is necessary to inspect whether or not the nut 11 is not attached each time welding is completed.
There were drawbacks that were laborious and laborious. The present invention provides a new nut spot welding machine that solves the above-mentioned drawbacks by shutting off the power supply to the fixed and movable electrodes 1 and 3 when the nut 11 is not supplied between some electrodes. With the goal.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記目的を達
成するために、以下の如く構成したものである。即ち固
定電極の軸心部にナットのねじ孔に係合し、かつ弾性体
により固定電極に対して所定量上方に突出するガイドピ
ンを設け、固定電極の上部側に対向配置されて上下動さ
れる可動電極の外周部に、筒状の第１センサーを摺動可
能に嵌合するとともに、該第１センサーを可動電極より
も下方に突出付勢する付勢装置を設け、可動電極の下端
部に前記ガイドピンが嵌合する嵌合孔と径方向に貫通し
て上下方向に延びる長孔とを設け、前記ガイドピンと衝
突可能のピン状の第２センサーを前記嵌合孔および長孔
を介して可動電極の径方向に貫通させてその両端を前記
第１センサーに係止し、前記第１センサーが可動電極に
対して上方に移動した際に、スポット溶接機の電源を遮
断する接点を設ける構成にしたものである。また、前記
第２センサーに、可動電極の嵌合孔に上下動可能に嵌合
し、かつ固定電極のガイドピンが嵌合可能の筒状の第３
センサーを設けるとともに、該第３センサーを可動電極
よりも下方に突出させる構成にしたものである。Means for Solving the Problems The present invention has the following configuration to achieve the above object. That is, a guide pin that engages with the screw hole of the nut and projects upward by a predetermined amount with respect to the fixed electrode by the elastic body is provided at the axial center portion of the fixed electrode, and the guide pin is arranged facing the upper side of the fixed electrode and moved up and down. A cylindrical first sensor is slidably fitted to the outer periphery of the movable electrode, and an urging device for urging the first sensor so as to project downward from the movable electrode is provided. Is provided with a fitting hole into which the guide pin is fitted and an elongated hole penetrating in the radial direction and extending in the vertical direction, and a pin-shaped second sensor capable of colliding with the guide pin is provided through the fitting hole and the elongated hole. The movable electrode is pierced in the radial direction, both ends thereof are locked to the first sensor, and a contact is provided to shut off the power source of the spot welding machine when the first sensor moves upward with respect to the movable electrode. It is configured. In addition, a cylindrical third that fits in the fitting hole of the movable electrode in the second sensor so as to be vertically movable, and can fit the guide pin of the fixed electrode.
A sensor is provided and the third sensor is configured to protrude below the movable electrode.
【０００８】[0008]
【実施例】以下本発明の実施例を図に基づいて説明す
る。図面において、図１は本発明の実施例を示す多電極
型のスポット溶接機の第１例の検出状態を示す要部断面
図、図２はその第２例の検出状態を示す要部断面図、図
３はその第３例の検出状態を示す要部断面図である。図
１において、１５は左右に配置した共に同構造の固定電
極であり、金属材により円柱状に形成するとともに、軸
心部に弾性体１６によって所定量上方に突出付勢される
ガイドピン１７を有する。このガイドピン１７は上部１
７ａが円錐状に形成され、基部１７ｂは後述するナット
３６のネジ孔径よりも大径に形成する。なお、上記円錐
状に形成された上部１７ａの上下方向の長さはナット３
６の高さと略同じとし、また上部１７ａの固定電極１５
からの初期突出量はナット３６の高さよりも大きくす
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In the drawings, FIG. 1 is a sectional view of an essential part showing a detection state of a first example of a multi-electrode type spot welding machine showing an embodiment of the present invention, and FIG. 2 is a sectional view of an essential part showing a detection state of the second example thereof. FIG. 3 is a cross-sectional view of essential parts showing a detection state of the third example. In FIG. 1, reference numeral 15 is a fixed electrode that is disposed on the left and right and has the same structure. The fixed electrode 15 is formed of a metal material in a cylindrical shape, and has a guide pin 17 that is biased upward by a predetermined amount by an elastic body 16 at the axial center portion. Have. This guide pin 17 has an upper part 1
7a is formed in a conical shape, and the base portion 17b is formed to have a diameter larger than a screw hole diameter of a nut 36 described later. The vertical length of the conical upper part 17a is determined by the nut 3
6 and the fixed electrode 15 on the upper portion 17a
The initial amount of protrusion from is larger than the height of the nut 36.
【０００９】上記各固定電極１５の上方に共に同構造の
可動電極２０を対向配置する。この可動電極２０は、そ
の下端部を段状に大径に形成し、この大径部に上記ガイ
ドピン１７よりも大径の嵌合孔２１および径方向に貫通
して上下方向に延びる長孔２２を形成する。上記可動電
極２０の下部外周にプラスチックからなる絶縁材により
円筒状に形成された第１センサー２３を上下方向に摺動
可能に嵌合させる。この第１センサー２３は、下部が大
径となる段付円筒状に形成されたホルダー２３ａを上記
可動電極２０の下部の大径部および該大径部の直上の小
径部に嵌合させ、該ホルダー２３ａの下端に感知体２３
ｂを固定してなり、感知体２３ｂはリング状に形成する
とともに下面に後述するナット３６が嵌合する凹部を形
成する。上記第１センサー２３をコイルバネからなる付
勢装置２５により下方に押圧し、感知体２３ｂの外周の
下端２３ｃを可動電極２０よりも所定量下方に突出付勢
する。A movable electrode 20 having the same structure is arranged above each fixed electrode 15 so as to face each other. The movable electrode 20 has a lower end formed in a stepped shape with a large diameter, and a fitting hole 21 having a diameter larger than that of the guide pin 17 and a long hole penetrating in the radial direction and extending in the vertical direction. 22 is formed. A first sensor 23, which is formed in a cylindrical shape by an insulating material made of plastic, is slidably fitted on the lower outer periphery of the movable electrode 20 in the vertical direction. In this first sensor 23, a holder 23a formed in a stepped cylindrical shape having a large diameter in the lower portion is fitted to the large diameter portion of the lower portion of the movable electrode 20 and a small diameter portion immediately above the large diameter portion, At the lower end of the holder 23a, the sensing body 23
b is fixed, and the sensing body 23b is formed in a ring shape, and a concave portion into which a nut 36 described later is fitted is formed on the lower surface. The first sensor 23 is pressed downward by an urging device 25 formed of a coil spring, and the lower end 23c of the outer periphery of the sensing body 23b is urged downward by a predetermined amount below the movable electrode 20.
【００１０】上記第１センサー２３の大径孔の上端部に
導電材によりリング状に形成された可動接触片２６を嵌
合固定し、この可動接触片２６を可動電極２０の大径段
部からなる固定接触片２７に上方から当接させる。上記
可動接触片２６および固定接触片２７は、スポット溶接
機の電源を遮断する遮断回路（図示省略）の接点をな
し、可動接触片２６が上動して固定接触片２７から離脱
すると、ナットのスポット溶接機の電源、従って固定電
極１５および可動電極２０への通電を遮断するようにな
っている。A ring-shaped movable contact piece 26 made of a conductive material is fitted and fixed to the upper end of the large-diameter hole of the first sensor 23, and the movable contact piece 26 is removed from the large-diameter step of the movable electrode 20. The fixed contact piece 27 is made to abut from above. The movable contact piece 26 and the fixed contact piece 27 form a contact of a cutoff circuit (not shown) for cutting off the power source of the spot welding machine, and when the movable contact piece 26 moves upward and separates from the fixed contact piece 27, the nut The power supply to the spot welding machine, that is, the fixed electrode 15 and the movable electrode 20 are cut off from the power supply.
【００１１】前述した可動電極２０の嵌合孔２１および
長孔２２にピン状の第２センサー３０を水平方向に挿通
して可動電極２０の下部を径方向に貫通させ、その両端
を第１センサー２３の感知体２３ｂの上部に係止する。
上記第２センサー３０は、可動電極２０の直径線上に位
置させて固定電極１５側のガイドピン１７と衝突可能と
し、該ガイドピン１７が第２センサー３０に衝突した際
には、第１センサー２３が可動電極２０に対して上方に
移動され、可動接触片２６を固定接触片２７から離脱さ
せるようにする。The pin-shaped second sensor 30 is horizontally inserted into the fitting hole 21 and the elongated hole 22 of the movable electrode 20 described above to penetrate the lower portion of the movable electrode 20 in the radial direction, and both ends thereof are the first sensor. The sensor 23 of FIG.
The second sensor 30 is positioned on the diameter line of the movable electrode 20 so that it can collide with the guide pin 17 on the fixed electrode 15 side, and when the guide pin 17 collides with the second sensor 30, the first sensor 23 Is moved upward with respect to the movable electrode 20 to separate the movable contact piece 26 from the fixed contact piece 27.
【００１２】また、上記可動電極２０の嵌合孔２１にガ
イドピン１７が遊嵌する筒状の第３センサー３１を上下
動可能に嵌合させるとともに、該第３センサー３１の上
端に前述した第２センサー３０を径方向から挿通して懸
垂支持する。この第３センサー３１の下端は、可動電極
２０よりも下方に突出させる。Further, a cylindrical third sensor 31 in which the guide pin 17 is loosely fitted is fitted in the fitting hole 21 of the movable electrode 20 so as to be vertically movable, and the upper end of the third sensor 31 is provided with the above-mentioned first member. 2 The sensor 30 is inserted from the radial direction and is suspended and supported. The lower end of the third sensor 31 is projected below the movable electrode 20.
【００１３】次に上記実施例の作用・効果について説明
する。所定箇所に通し孔３５ａが明けられた金属板３
５、およびこの金属板３５に固着されるナット３６を用
意し、金属板３５を固定電極１５の上面に載置するとと
もに、その通し孔３５ａを各固定電極１５のガイドピン
１７に挿通する。次いでナット３６をシュート（図示省
略）により各固定電極１５が位置する金属板３５の上面
に供給し、該ナット３６を各ガイドピン１７に嵌合させ
て位置決めする。次いで各可動電極２０を同時に下降さ
せて各ナット３６を下方に押圧した後、通電して該各ナ
ット３６を同時に上記金属板３５に溶着する。Next, the operation and effect of the above embodiment will be described. Metal plate 3 having through holes 35a formed at predetermined locations
5, and a nut 36 fixed to the metal plate 35 is prepared, the metal plate 35 is placed on the upper surface of the fixed electrode 15, and the through hole 35a is inserted into the guide pin 17 of each fixed electrode 15. Next, the nut 36 is supplied to the upper surface of the metal plate 35 where each fixed electrode 15 is located by a chute (not shown), and the nut 36 is fitted into each guide pin 17 and positioned. Next, the movable electrodes 20 are simultaneously moved down to press the nuts 36 downward, and then the nuts 36 are simultaneously welded to the metal plate 35 by energizing them.
【００１４】この場合、図１に示すように、例えば右部
のガイドピン１７−２部にナット３６が供給されなかっ
た状態、即ち第１例の状態において、各可動電極２０が
金属板３５に向かって下降すると、左部のガイドピン１
７−１はナット３６に押されて下降し、第２センサー３
０に接触せず、左部側は、第１センサー２３−１が作動
することなく、下部電極１５−１と上部電極２０−１と
でナット３６を正常の状態で挾圧することになる。一
方、右部のガイドピン１７−２はナット３６が存在しな
いので、弾性体１６により上方に突出したままとなり、
右部側は、ガイドピン１７−２が第２センサー３０に衝
突して右部の第１センサー２３−２を可動電極２０−２
に対して上方に相対移動させ、その可動接触片２６を固
定接触片２７から離間させることになる。これにより、
スポット溶接機の電源、つまり各電極１５，２０間への
通電が遮断され、各ナット３６は金属板３５に溶着され
ないことになる。In this case, as shown in FIG. 1, for example, in a state where the nut 36 is not supplied to the right guide pin 17-2, that is, in the state of the first example, each movable electrode 20 is attached to the metal plate 35. As you descend, the guide pin 1 on the left side
7-1 is pushed by the nut 36 and descends, and the second sensor 3
On the left side without contacting 0, the nut 36 is normally pressed by the lower electrode 15-1 and the upper electrode 20-1 without the first sensor 23-1 operating. On the other hand, since the guide pin 17-2 on the right part does not have the nut 36, the elastic member 16 keeps protruding upward,
On the right side, the guide pin 17-2 collides with the second sensor 30 so that the first sensor 23-2 on the right side moves to the movable electrode 20-2.
With respect to the movable contact piece 26, the movable contact piece 26 is moved away from the fixed contact piece 27. This allows
The power supply of the spot welding machine, that is, the power supply between the electrodes 15 and 20 is cut off, and the nuts 36 are not welded to the metal plate 35.
【００１５】また、図２に示すように、例えば左部のナ
ット３６−１が正常に、右部のナット３６−２が上下逆
向きになって金属板３５上に供給された場合、即ち第２
例の場合において、左部側は、前述と同様に、第１セン
サー２３−１が作動することなく、下部電極１５−１と
上部電極２０−１とでナット３６を正常の状態で挾圧す
ることになる。一方、右部側は、可動電極２０−２がナ
ット３６−２に当接する前段に第３センサー３１の下端
がナット３６−２の内周の上端に衝突し、第２センサー
３０を介して第１センサー２３−２が可動電極２０−２
に対して上方に相対移動し、その可動接触片２６が固定
接触片２７から離間し、前述と同様に各電極１５，２０
間への通電が遮断され、各ナット３６は金属板３５に溶
着されないことになる。Further, as shown in FIG. 2, for example, when the left nut 36-1 is normally supplied and the right nut 36-2 is turned upside down and supplied onto the metal plate 35, that is, Two
In the case of the example, similarly to the above, on the left side, the nut 36 is normally pressed by the lower electrode 15-1 and the upper electrode 20-1 without the first sensor 23-1 operating. become. On the other hand, on the right side, the lower end of the third sensor 31 collides with the upper end of the inner circumference of the nut 36-2 before the movable electrode 20-2 contacts the nut 36-2, and the second sensor 30 is used to 1 sensor 23-2 is movable electrode 20-2
And the movable contact piece 26 is separated from the fixed contact piece 27, and the electrodes 15 and 20 are moved in the same manner as described above.
The energization to the gap is cut off, and the nuts 36 are not welded to the metal plate 35.
【００１６】さらに、図３に示すように、電極１５，２
０間に外径の大きい異種のナット３６−３が供給された
場合、即ち第３例の場合は、可動電極２０が上記ナット
３６に当接する前に第１センサー２３の下端２３ｃがナ
ット３６の上面に当接し、該第１センサー２３が可動電
極２０に対して上方に相対移動する。これにより、可動
接触片２６が固定接触片２７から離間し、前述と同様に
各電極１５，２０間への通電が遮断され、各ナット３６
は金属板３５に溶着されないことになる。Further, as shown in FIG.
When a different type of nut 36-3 having a large outer diameter is supplied between 0, that is, in the case of the third example, the lower end 23c of the first sensor 23 is attached to the nut 36 before the movable electrode 20 contacts the nut 36. The first sensor 23 comes into contact with the upper surface and moves upward relative to the movable electrode 20. As a result, the movable contact piece 26 is separated from the fixed contact piece 27, the electric conduction between the electrodes 15 and 20 is cut off, and the nuts 36 are removed in the same manner as described above.
Will not be welded to the metal plate 35.
【００１７】[0017]
【発明の効果】以上の説明から明らかな如く、本発明は
供給されたナットが未供給となったり、上下逆向きにな
ったり、あるいは異種のナットが供給されたりした際
に、固定・可動電極への通電が遮断されることになり、
不良品の発生を未然に防止することができる。特に、固
定電極、可動電極を複数組み並列に配置し、金属板上に
複数のナットを同時に供給してこれらを一括して金属板
に溶着する多電極型のスポット溶接機において、一部の
ナットが未着となるような不良品の発生を防止すること
ができる。As is apparent from the above description, according to the present invention, when the supplied nut is not supplied, is turned upside down, or different kinds of nuts are supplied, the fixed / movable electrode is provided. Power to the
It is possible to prevent the occurrence of defective products. Particularly, in a multi-electrode type spot welding machine in which a plurality of fixed electrodes and movable electrodes are arranged in parallel and a plurality of nuts are simultaneously supplied onto a metal plate and are welded to the metal plate at once, some nuts are used. It is possible to prevent the occurrence of defective products that do not arrive.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の実施例を示す第１例の検出状態を示す
要部断面図である。FIG. 1 is a sectional view of an essential part showing a detection state of a first example showing an embodiment of the present invention.
【図２】本発明の実施例を示す第２例の検出状態を示す
要部断面図である。FIG. 2 is a cross-sectional view of essential parts showing a detection state of a second example showing the embodiment of the present invention.
【図３】本発明の実施例を示す第３例の検出状態を示す
要部断面図である。FIG. 3 is a cross-sectional view of essential parts showing a detection state of a third example showing the embodiment of the present invention.
【図４】従来例を示す要部断面図である。FIG. 4 is a sectional view of a main part showing a conventional example.
１５ 固定電極 １６ 弾性体 １７ ガイドピン ２０ 可動電極 ２１ 嵌合孔 ２２ 長孔 ２３ 第１センサー ２３ａ ホルダー ２３ｂ 感知体 ２３ｃ 下端 ２５ 付勢装置（コイルバネ） ２６ 可動接触片 ２７ 固定接触片 ３０ 第２センサー ３１ 第３センサー ３５ 金属板 ３５ａ 通し孔 ３６ ナット 15 fixed electrode 16 elastic body 17 guide pin 20 movable electrode 21 fitting hole 22 long hole 23 first sensor 23a holder 23b sensing body 23c lower end 25 biasing device (coil spring) 26 movable contact piece 27 fixed contact piece 30 second sensor 31 Third sensor 35 Metal plate 35a Through hole 36 Nut
Claims (2)
合し、かつ弾性体により固定電極に対して所定量上方に
突出するガイドピンを設け、固定電極の上部側に対向配
置されて上下動される可動電極の外周部に、筒状の第１
センサーを摺動可能に嵌合するとともに、該第１センサ
ーを可動電極よりも下方に突出付勢する付勢装置を設
け、可動電極の下端部に前記ガイドピンが嵌合する嵌合
孔と径方向に貫通して上下方向に延びる長孔とを設け、
前記ガイドピンと衝突可能のピン状の第２センサーを前
記嵌合孔および長孔を介して可動電極の径方向に貫通さ
せてその両端を前記第１センサーに係止し、前記第１セ
ンサーが可動電極に対して上方に移動した際に、スポッ
ト溶接機の電源を遮断する接点を設けたことを特徴とす
るナットのスポット溶接機。1. A guide pin that engages with a screw hole of a nut and projects upward by a predetermined amount with respect to the fixed electrode by an elastic body is provided at an axial center portion of the fixed electrode, and is arranged so as to face an upper side of the fixed electrode. On the outer periphery of the movable electrode that is vertically moved by
The sensor is slidably fitted, and a biasing device is provided for biasing the first sensor so as to project downward from the movable electrode, and a fitting hole and a diameter for fitting the guide pin to the lower end of the movable electrode. And a long hole that penetrates in the vertical direction and extends in the vertical direction,
A pin-shaped second sensor capable of colliding with the guide pin is passed through the fitting electrode and the elongated hole in the radial direction of the movable electrode, and both ends thereof are locked to the first sensor so that the first sensor is movable. A spot welding machine for nuts, which is provided with a contact for cutting off the power source of the spot welding machine when it moves upward with respect to the electrode.
に上下動可能に嵌合し、かつ固定電極のガイドピンが嵌
合可能の筒状の第３センサーを設けるとともに、該第３
センサーを可動電極よりも下方に突出させたことを特徴
とする請求項１記載のナットのスポット溶接機。2. A cylindrical third sensor fitted to the fitting hole of the movable electrode so as to be vertically movable and into which a guide pin of the fixed electrode can be fitted, is provided in the second sensor, and the third sensor is provided.
2. The nut spot welding machine according to claim 1, wherein the sensor is projected below the movable electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18333895A JPH0910956A (en) | 1995-06-26 | 1995-06-26 | Spot welding machine for nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18333895A JPH0910956A (en) | 1995-06-26 | 1995-06-26 | Spot welding machine for nut |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0910956A true JPH0910956A (en) | 1997-01-14 |
Family
ID=16133981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18333895A Pending JPH0910956A (en) | 1995-06-26 | 1995-06-26 | Spot welding machine for nut |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0910956A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7564005B2 (en) | 2001-07-10 | 2009-07-21 | Doben Limited | Resistance welding fastener electrode and monitor and method of using same |
| CN102029467A (en) * | 2010-12-22 | 2011-04-27 | 东莞奕华电子有限公司 | Automatic spot welding machine |
| CN102169768A (en) * | 2011-04-18 | 2011-08-31 | 上海航天科工电器研究院有限公司 | Spot-welding positioning mechanism for process gasket of protector |
| CN103192193A (en) * | 2013-01-11 | 2013-07-10 | 浙江豪情汽车制造有限公司 | Follow-up compression projection welding electrode |
| CN103286432A (en) * | 2013-05-16 | 2013-09-11 | 安徽江淮汽车股份有限公司 | Splatter-proof lower electrode for projection welding |
| JP2015047610A (en) * | 2013-08-30 | 2015-03-16 | 八千代工業株式会社 | Stationary type welding device |
| EP3016774A1 (en) * | 2014-09-18 | 2016-05-11 | Doben Limited | Welder with indirect sensing of weld fastener position |
-
1995
- 1995-06-26 JP JP18333895A patent/JPH0910956A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7564005B2 (en) | 2001-07-10 | 2009-07-21 | Doben Limited | Resistance welding fastener electrode and monitor and method of using same |
| CN102029467A (en) * | 2010-12-22 | 2011-04-27 | 东莞奕华电子有限公司 | Automatic spot welding machine |
| CN102169768A (en) * | 2011-04-18 | 2011-08-31 | 上海航天科工电器研究院有限公司 | Spot-welding positioning mechanism for process gasket of protector |
| CN103192193A (en) * | 2013-01-11 | 2013-07-10 | 浙江豪情汽车制造有限公司 | Follow-up compression projection welding electrode |
| CN103192193B (en) * | 2013-01-11 | 2015-04-08 | 浙江豪情汽车制造有限公司 | Follow-up compression projection welding electrode |
| CN103286432A (en) * | 2013-05-16 | 2013-09-11 | 安徽江淮汽车股份有限公司 | Splatter-proof lower electrode for projection welding |
| JP2015047610A (en) * | 2013-08-30 | 2015-03-16 | 八千代工業株式会社 | Stationary type welding device |
| EP3016774A1 (en) * | 2014-09-18 | 2016-05-11 | Doben Limited | Welder with indirect sensing of weld fastener position |
| CN105612021A (en) * | 2014-09-18 | 2016-05-25 | 多宾有限公司 | Welder with indirect sensing of weld fastener position |
| EP3016774A4 (en) * | 2014-09-18 | 2016-08-31 | Doben Ltd | Welder with indirect sensing of weld fastener position |
| US10092973B2 (en) | 2014-09-18 | 2018-10-09 | Doben Limited | Welder with indirect sensing of weld fastener position |
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