JP2759555B2 - Double-head welding gun device - Google Patents

Double-head welding gun device

Info

Publication number
JP2759555B2
JP2759555B2 JP2264272A JP26427290A JP2759555B2 JP 2759555 B2 JP2759555 B2 JP 2759555B2 JP 2264272 A JP2264272 A JP 2264272A JP 26427290 A JP26427290 A JP 26427290A JP 2759555 B2 JP2759555 B2 JP 2759555B2
Authority
JP
Japan
Prior art keywords
arm
common
movable
switching valve
opening
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.)
Expired - Fee Related
Application number
JP2264272A
Other languages
Japanese (ja)
Other versions
JPH04143080A (en
Inventor
敬三郎 大滝
隆嗣 久保
正樹 河田
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.)
Honda Motor Co Ltd
Original Assignee
Honda Motor 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 Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2264272A priority Critical patent/JP2759555B2/en
Publication of JPH04143080A publication Critical patent/JPH04143080A/en
Application granted granted Critical
Publication of JP2759555B2 publication Critical patent/JP2759555B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、溶接箇所の位置や方向が異なる異種のワー
クも溶接し得るようにした実質的に1対の溶接ガンを備
える双頭式溶接ガン装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a double-headed welding gun provided with a pair of welding guns capable of welding different kinds of workpieces having different welding positions and directions. Related to the device.

(従来の技術) 従来、この種の溶接ガン装置としては、特公昭47−45
263号公報により、先端部に1対の電極を互に異なる向
きに取付けた中間アームと、先端部に中間アームの各電
極に対向する各1個の電極を取付けた1対の可動アーム
とを備え、両可動アームの何れか一方を中間アームに対
し選択的に閉じ動作させるようにしたものが知られてい
る。
(Prior art) Conventionally, as this type of welding gun device, Japanese Patent Publication No. 47-45
According to Japanese Patent No. 263, an intermediate arm in which a pair of electrodes are attached to a tip portion in different directions from each other, and a pair of movable arms in which a single electrode facing each electrode of the intermediate arm is attached to a tip portion. It is known that one of the two movable arms is selectively closed with respect to the intermediate arm.

このものでは、中間アームの尾端部に2個のピストン
を内蔵する加圧シリンダを取付け、各ピストンを各別の
ピストンロッドを介して各可動アームに連結すると共
に、両可動アームの何れか一方のみを揺動可能とするイ
ンタロック装置を設け、何れか一方の可動アームを選択
的に閉じ動作させるようにしている。
In this apparatus, a pressurizing cylinder containing two pistons is attached to the tail end of the intermediate arm, and each piston is connected to each movable arm via a separate piston rod. An interlock device that allows only one to swing is provided so that one of the movable arms is selectively closed.

(発明が解決しようとする課題) 上記従来のものでは、加圧シリンダとして2個のピス
トンを内蔵するものを用い、更にインタロック装置を設
ける必要があって、構造が複雑となり高価となる不具合
がある。
(Problems to be Solved by the Invention) In the above-mentioned conventional apparatus, a pressurizing cylinder having two built-in pistons is used, and it is necessary to further provide an interlock device. is there.

本発明は、以上の点に鑑み、インタロック装置が不要
で且つピストンを単一とした加圧シリンダにより1対の
可動アームの何れか一方を選択的に閉じ動作し得るよう
にした双頭式溶接ガン装置を提供することをその目的と
している。
SUMMARY OF THE INVENTION In view of the above, the present invention provides a double-headed welding system in which an interlock device is not required and one of a pair of movable arms can be selectively closed by a pressure cylinder having a single piston. It is intended to provide a gun device.

(課題を解決するための手段) 上記目的を達成すべく、本発明では、先端部に1対の
電極を互に異なる向きに取付けた中間アームと、先端部
に中間アームの各電極に対向する各1個の電極を取付け
た1対の可動アームとを備え、両可動アームの何れか一
方を中間アームに対し選択的に閉じ動作させるようにし
た双頭式溶接ガン装置において、両可動アームを一体化
した二股形状の共通アームを形成して、中間アームに該
共通アームを、該共通アームの正逆の揺動で両可動アー
ムの一方と他方とが中間アームに対し交互に閉じ動作さ
れるように枢支し、中間アームと共通アームとの一方の
尾端部に、他方の尾端部にピストンロッドを介して連結
される単一のピストンを内蔵する加圧シリンダを取付け
ると共に、該中間アームと該共通アームとを共通の枢軸
を介して枢支したガンブラケットを設け、該ガンブラケ
ットと共通アームとの一方にストッパピンと、他方に該
ピンに係合して共通アームの揺動範囲を規制する長溝と
を形成した。
(Means for Solving the Problems) In order to achieve the above object, according to the present invention, an intermediate arm in which a pair of electrodes are attached to a distal end portion in different directions from each other, and a distal end portion facing each electrode of the intermediate arm. A double-headed welding gun device comprising a pair of movable arms each having one electrode attached thereto, and selectively closing one of the two movable arms with respect to the intermediate arm; A bifurcated common arm is formed, and the common arm is moved to the intermediate arm, and one and the other of the two movable arms are alternately closed with respect to the intermediate arm by forward and reverse swinging of the common arm. A pressurizing cylinder containing a single piston, which is pivotally supported at one tail end of the intermediate arm and the common arm and connected to the other tail end via a piston rod, And the common arm A gun bracket pivotally supported via a common pivot is provided, and a stopper pin is formed on one of the gun bracket and the common arm, and a long groove which engages with the pin and regulates a swing range of the common arm is formed. .

(作 用) 加圧シリンダのピストンの往動によって共通アームが
正方向に揺動されると、一方の可動アームが閉じ動作さ
れると共に他方の可動アームが開き動作され、又ピスト
ンの復動によって共通アームが逆方向に揺動されると、
一方の可動アームが開き動作されると共に他方の可動ア
ームが閉じ動作される。
(Operation) When the common arm is swung in the forward direction by the forward movement of the piston of the pressurizing cylinder, one movable arm is closed and the other movable arm is opened, and the piston is moved backward. When the common arm is swung in the opposite direction,
One movable arm is opened and the other movable arm is closed.

そして、一方の可動アームの電極とこれに対向する中
間アームの一方の電極との間にワークを挾んで溶接する
ときは、加圧シリンダのピストンを復動位置から往動さ
せて該一方の可動アームを閉じ、溶接後ピストンを復動
させて該一方の可動アームを開き、又他方の可動アーム
の電極とこれに対向する中間アームの他方の電極との間
にワークを挾んで溶接するときは、ピストンを往動位置
から復動させて該他方の可動アームを閉じ、溶接後ピス
トンを往動させて該他方の可動アームを開く。
When the work is sandwiched between the electrode of one movable arm and one electrode of the intermediate arm opposed thereto, welding is performed by moving the piston of the pressurizing cylinder forward from the reverse position. When the arm is closed and the piston is moved backward after welding to open the one movable arm, and when welding the work between the electrode of the other movable arm and the other electrode of the intermediate arm facing it, Then, the piston is moved backward from the forward movement position to close the other movable arm, and after welding, the piston is moved forward to open the other movable arm.

更に、本発明によれば、ピストンの往動により一方の
可動アームを閉じて溶接を行った後、ピストンを復動さ
せる際、該一方の可動アームが所定開度に開かれたとこ
ろで、ストッパピンが長溝の一方の端部に当接し、以後
当接反力により加圧シリンダを介して中間アームが枢軸
を中心にして開き側に回動され、所謂イコライズ動作が
与えられて、中間アームの電極がワークに溶着してもこ
れをワークから剥離できる。他方の可動アームによる溶
接後のガン開きに際しても、ストッパピンが長溝の他方
の端部に当接して同様にイコライズ動作が与えられる。
Further, according to the present invention, when the one movable arm is opened to a predetermined opening when the piston is moved backward after one of the movable arms is closed and welded by the forward movement of the piston, the stopper pin is provided. Abuts on one end of the long groove, and thereafter, the intermediate arm is rotated to the open side about the pivot axis via the pressure cylinder by the contact reaction force, so that a so-called equalizing operation is given, and the electrode of the intermediate arm is provided. Can be separated from the work even if it is welded to the work. Even when the gun is opened after welding by the other movable arm, the stopper pin abuts on the other end of the long groove, and an equalizing operation is similarly given.

又、加圧シリンダの流体圧回路に一対の切換弁を直列
に介入し、一方の切換弁を前記両可動アームの何れを閉
じ動作させるかを選択する選択用切換弁、他方の切換弁
を選択された可動アームを開閉する開閉用切換弁として
用い、該開閉用切換弁を、スプリングオフセット単一ソ
レノイド型の電磁弁であって、選択された可動アームを
開く切換位置にスプリングによって付勢保持されるよう
に構成しておけば、何れの可動ガンアームを選択して溶
接を行っていても、切換弁の制御系統の断線等の異常に
よって切換弁のソレノイドへの通電が停止されたとき
は、開閉用切換弁のスプリングによる開き側の切換位置
への復帰によって可動アームが開かれ、可動アームの特
別な開放操作を要することなくワークを離脱でき、事後
対策が容易になる。
In addition, a pair of switching valves are interposed in series in the fluid pressure circuit of the pressurizing cylinder, and one of the two switching arms is used to select which of the two movable arms is to be closed, and the other is selected. A switching valve for opening and closing the movable arm, which is a solenoid valve of a spring offset single solenoid type, which is biased and held by a spring at a switching position for opening the selected movable arm. With this configuration, no matter which of the movable gun arms is selected for welding, if the power to the solenoid of the switching valve is stopped due to an abnormality such as disconnection of the control system of the switching valve, it will be opened and closed. The movable arm is opened by the return of the switching valve to the open switching position by the spring, and the work can be separated without requiring a special opening operation of the movable arm, which makes it easy to take a subsequent measure.

(実施例) 図示の実施例は、自動車車体のサイドシル部の溶接に
用いられる溶接ガン装置であって、第1図にAで示す、
サイドシルの外側面に溶接フランジaを有する機種と、
Bで示す、サイドシルの下面に溶接フランジbを有する
機種とに共用し得るようにしたものを示す。
(Embodiment) The illustrated embodiment is a welding gun device used for welding a side sill portion of an automobile body, and is shown by A in FIG.
A model having a welding flange a on the outer surface of the side sill,
B shows a model that can be used in common with a model having a welding flange b on the lower surface of a side sill.

第1図乃至第3図を参照して、(1)はロボット等の
移動機構の可動端、(2)は該可動端に搭載したトラン
スケース、(3)は該トランスケース(2)に取付けた
ガンブラケットを示し、該ガンブラケット(3)の先端
の1対の側板(3a)(3a)間に横設した共通の枢軸
(4)に、A機種に対応する下向きの第1電極(5a)と
B機種に対応する横向きの第2電極(5b)とを取付けた
中間アーム(5)と、第1電極(5a)の下方に対向する
電極(6a)を取付けた第1可動アーム(61)と第2電極
(5b)の横方向外方に対向する電極(6b)を取付けた第
2可動アーム(62)とを一体化した二股形状の共通アー
ム(6)とを枢支した。
Referring to FIGS. 1 to 3, (1) is a movable end of a moving mechanism such as a robot, (2) is a transformer case mounted on the movable end, and (3) is attached to the transformer case (2). And a common pivot (4) laterally provided between a pair of side plates (3a) (3a) at the tip of the gun bracket (3). ) And a second transverse electrode (5b) corresponding to the B model, and a first movable arm (6) attached with an opposing electrode (6a) below the first electrode (5a). 1 ) and a bifurcated common arm (6) in which a second movable arm (6 2 ) having an electrode (6b) opposed to the second electrode (5b) laterally outward is mounted. .

中間アーム(5)は、第4図に示す如く、その尾端部
両側面にボルト(7)止めした2枚板構造のアームホル
ダ(8)を備えるもので、中間アーム(5)を該アーム
ホルダ(8)を介して前記枢軸(4)に枢支し、前記共
通アーム(6)を該ホルダ(8)の2枚の板間において
該枢軸(4)に枢支した。図中(9)は絶縁材を示す。
As shown in FIG. 4, the intermediate arm (5) includes an arm holder (8) having a two-plate structure fixed to both side surfaces of the tail end thereof with bolts (7). The pivot (4) was pivotally supported via a holder (8), and the common arm (6) was pivotally supported on the pivot (4) between two plates of the holder (8). (9) in the figure indicates an insulating material.

アームホルダ(8)の尾端部上面には、単一のピスト
ン(10a)を内蔵する加圧シリンダ(10)が取付けられ
ており、該ピストン(10a)から下方にのびるピストン
ロッド(10b)を第5図示の如くリンク(10c)を介して
共通アーム(6)の尾端部に連結し、ピストン(10a)
の下動によれば、共通アーム(6)が時計方向に揺動さ
れて、中間アーム(5)に対し第1可動アーム(61)が
閉じられると共に第2可動アーム(62)が開かれ、又ピ
ストン(10a)の上動によれば、共通アーム(6)が反
時計方向に揺動されて、第1可動アーム(61)が開かれ
ると共に第2可動アーム(62)が閉じられるようにし
た。
A pressure cylinder (10) containing a single piston (10a) is attached to the upper surface of the tail end of the arm holder (8), and a piston rod (10b) extending downward from the piston (10a) is attached to the cylinder. As shown in FIG. 5, it is connected to the tail end of the common arm (6) via the link (10c), and the piston (10a)
According to downward movement of, is swung common arm (6) is clockwise, the second movable arm together with the first movable arm with respect to the intermediate arm (5) (6 1) is closed (6 2) is opened According to the upward movement of the piston (10a), the common arm (6) is swung counterclockwise to open the first movable arm (6 1 ) and to move the second movable arm (6 2 ). It can be closed.

更に、前記ガンブラケッ(3)の側板(3a)(3a)間
に前記枢軸(4)から離間させてストッパピン(11)を
横設すると共に、共通アーム(6)に該ピン(11)を挿
通する長溝(12)を形成し、加圧シリンダ(10)のピス
トン(10a)の上動で第1可動アーム(61)を開く際、
該アーム(61)が所定開度に開かれたところで長溝(1
2)の時計方向の端部がストッパピン(11)に当接し、
以後当接反力により加圧シリンダ(10)を介して中間ア
ーム(5)が時計方向に揺動されて、該中間アーム
(5)に第2電極(5b)が第2可動アーム(62)の電極
(6b)に当接するまでのイコライズ動作が与えられ、又
ピストン(10a)の下動で第2可動アーム(62)を開く
際にも、該アーム(62)が所定開度に開かれたところで
長溝(12)の反時計方向の端部がストッパピン(11)に
当接して、中間アーム(5)に反時計方向へのイコライ
ズ動作が与えられるようにした。
Further, a stopper pin (11) is laterally provided between the side plates (3a) and (3a) of the gun bracket (3) while being separated from the pivot (4), and the pin (11) is inserted into the common arm (6). When the first movable arm (6 1 ) is opened by moving the piston (10a) of the pressurizing cylinder (10)
When the arm (6 1 ) is opened to a predetermined opening, the long groove (1
The clockwise end of 2) abuts the stopper pin (11),
Thereafter, the intermediate arm (5) is swung clockwise through the pressing cylinder (10) by the contact reaction force, and the second electrode (5b) is attached to the intermediate arm (5) by the second movable arm (6 2). equalizing operation until it abuts against the electrode (6b) of) is given, and when opening the piston (second movable arm under movement of 10a) (6 2) also, the arm (6 2) of predetermined opening When it is opened, the counterclockwise end of the long groove (12) comes into contact with the stopper pin (11) so that the intermediate arm (5) is given a counterclockwise equalizing operation.

前記トランスケース(2)には溶接トランスが収納さ
れており、該トランスの一方の給電端子(13)を共通ア
ーム(6)の一側方に延出した端子部(6c)にオンス銅
板(13a)を介して接続し、該トランスの他方の給電端
子(14)を中間アーム(5)の他側方に延出した端子部
(5c)にオンス銅板(14a)と給電板(14b)とを介して
接続した。
A welding transformer is housed in the transformer case (2), and one power supply terminal (13) of the transformer is connected to a terminal part (6c) extending to one side of the common arm (6) by an ounce copper plate (13a). ), And the other power supply terminal (14) of the transformer is connected to a terminal portion (5c) extending to the other side of the intermediate arm (5) by an ounce copper plate (14a) and a power supply plate (14b). Connected through.

尚、本実施例において、第1可動アーム(61)はその
尾端部において共通アーム(6)にボルト(15)止めさ
れるが、これを共通アーム(6)に一体に形成すること
も勿論可能である。図中(16)は、ガンブラケット
(3)に中間アーム(5)と各可動アーム(61)(62
との対向間隙を閉塞すべく取付けたシールプレートを示
す。
In the present embodiment, the first movable arm (6 1 ) is fixed to the common arm (6) with a bolt (15) at its tail end, but it may be formed integrally with the common arm (6). Of course it is possible. In the figure, (16) indicates the intermediate arm (5) and each movable arm (6 1 ) (6 2 ) on the gun bracket (3).
Fig. 3 shows a seal plate attached to close a gap opposed to the seal plate.

前記加圧シリンダ(10)はエアで作動されるもので、
該シリンダ(10)のエア回路に、第6図に示す如く、1
対の切換弁(17)(18)を直列に介入し、一方の切換弁
(17)を、A、B2機種の車体に応じて第1と第2の可動
アーム(61)(62)の何れを閉じ動作させるかの選択を
行う選択用切換弁、他方の切換弁(18)を、選択された
可動アームを開閉する開閉用切換弁として用いるように
した。
The pressure cylinder (10) is operated by air,
In the air circuit of the cylinder (10), as shown in FIG.
A pair of switching valves (17) and (18) are interposed in series, and one switching valve (17) is connected to the first and second movable arms (6 1 ) and (6 2 ) in accordance with the vehicle types A and B. And the other switching valve (18) is used as an opening / closing switching valve for opening and closing the selected movable arm.

選択用切換弁(17)は、閉じ動作させる可動アームと
して第1可動アーム(61)を選択するA機種用の位置と
第2可動アーム(62)を選択するB機種用の位置とに切
換自在な電磁弁で構成され、開閉用切換弁(18)は、選
択された可動アームを開く開位置とこれを閉じる閉位置
とに切換自在で且つスプリングにより開位置に付勢保持
されるスプリングオフセット単一ソレノイド型の電磁石
で構成される。このスプリングは、機械式又はエア式の
何れであっても良い。
The selection switching valve (17) is set between a position for model A where the first movable arm (6 1 ) is selected as a movable arm to be closed and a position for model B where the second movable arm (6 2 ) is selected. The switching valve (18) for opening and closing is constituted by a switchable solenoid valve. The opening / closing switching valve (18) can be switched between an open position for opening the selected movable arm and a closed position for closing the movable arm, and is biased and held at the open position by the spring. It is composed of an offset single solenoid type electromagnet. This spring may be either mechanical or pneumatic.

車体がA機種の場合には、選択用切換弁(17)をA機
種用の位置に切換えるもので、これによれば常時は開位
置に存する開閉用切換弁(18)を介して加圧シリンダ
(10)の下室にエア源(19)からのエアが供給され、一
方、該シリンダ(10)の上室が両切換弁(18)(17)を
介して排気管(20)に接続され、ピストン(10a)が上
動して第1可動アーム(61)は開かれた状態に保持され
る。この状態で移動機構により溶接ガン装置をA機種の
車体の溶接フランジaの打点位置に移動し、次いで開閉
用切換弁(18)をそのソレノイドへの通電で閉位置に切
換えるもので、これによれば加圧シリンダ(10)の上室
にエアが供給されると共に下室が排気管(20)に接続さ
れ、ピストン(10a)が下動して第1可動アーム(61
が閉じられ、その電極(6a)と中間アーム(5)の第1
電極(5a)との間に溶接フランジaが挾まれ、この状態
で溶接トランスを介して中間アーム(5)と共通アーム
(6)とに給電する。この場合、第2可動アーム(62
は開かれているから、前記両電極(5a)(6a)間のみに
通電されて溶接フランジaの溶接が行われ、その後開閉
用切換弁(18)を開位置に切換えて第1可動アーム
(61)を開く。
When the vehicle body is a model A, the selection switching valve (17) is switched to the position for the model A. According to this, the pressurizing cylinder is normally switched via the switching valve (18) which is always in the open position. The air from the air source (19) is supplied to the lower chamber (10), while the upper chamber of the cylinder (10) is connected to the exhaust pipe (20) via both switching valves (18) and (17). the piston first movable arm (10a) is moved upward (61) is held in an open state. In this state, the welding gun device is moved by the moving mechanism to the position of the welding point of the welding flange a of the model A vehicle body, and then the switching valve (18) for opening and closing is switched to the closed position by energizing the solenoid. in the lower chamber with air is supplied to the upper chamber of the pressing cylinder (10) is connected to the exhaust pipe (20), the piston first movable arm (10a) is moved downward (6 1)
Is closed, its electrode (6a) and the first of the intermediate arm (5)
The welding flange (a) is sandwiched between the electrode (5a) and the power is supplied to the intermediate arm (5) and the common arm (6) via the welding transformer in this state. In this case, the second movable arm (6 2 )
Is open, the current is applied only between the two electrodes (5a) and (6a) to weld the welding flange a, and then the switching valve (18) for opening and closing is switched to the open position to switch the first movable arm ( 6 1 ) Open.

車体がB機種に変更された場合は、選択用切換弁(1
7)をB機種用の位置に切換えるもので、これによれば
開閉用切換弁(18)の開位置において、加圧シリンダ
(10)の上室にエアが供給されると共に下室が排気管
(20)に接続され、ピストン(10a)が下動して第2可
動アーム(62)が開かれる。そして、開閉用切換弁(1
8)を閉位置に切換えれば、加圧シリンダ(10)の下室
にエアが供給されると共に上室が排気管(20)に接続さ
れ、ピストン(10a)が上動して第2可動アーム(62
が閉じられ、その電極(6b)と中間アーム(5)の第2
電極(5b)との間にB機種の車体の溶接フランジbを挾
んでその溶接を行うことができる。
When the body is changed to model B, the selection switching valve (1
7) is switched to the position for model B. According to this, when the switching valve (18) for opening and closing is opened, air is supplied to the upper chamber of the pressurizing cylinder (10) and the lower chamber is connected to the exhaust pipe. (20) is connected, the piston second movable arm (10a) is moved downward (6 2) is opened. And the switching valve for opening and closing (1
When 8) is switched to the closed position, air is supplied to the lower chamber of the pressure cylinder (10), the upper chamber is connected to the exhaust pipe (20), and the piston (10a) moves upward to move the second movable cylinder. the arm (6 2)
Is closed, its electrode (6b) and the second of the intermediate arm (5)
The welding can be performed by sandwiching the welding flange b of the B type vehicle body between the electrode (5b) and the electrode (5b).

A、B何れの機種の溶接に際しても、切換弁(17)
(18)の制御系統の断線等の異常によって切換弁(17)
(18)のソレノイドへの通電が停止されたときは、各機
種に応じて選択された可動アームが開閉用切換弁(18)
のスプリングによる開位置への復帰で開かれ、可動アー
ムの特別な開放操作を要することなく車体を離脱でき
る。
Switching valve (17) for both types A and B
Switching valve (17) due to abnormality such as disconnection of control system in (18)
When energization of the solenoid in (18) is stopped, the movable arm selected according to each model is switched to the open / close switching valve (18).
The spring is opened by returning to the open position by the spring, and the vehicle body can be separated without requiring a special opening operation of the movable arm.

(発明の効果) 以上の説明から明らかなように、請求項1の発明によ
れば、単一のピストンを備える簡素な加圧シリンダを用
いて、1対の可動アームを選択的に閉じ操作させること
ができ、従来技術の如きインタロック装置も不要とな
り、選択動作される双頭式溶接ガン装置を構造簡単にし
て安価に得られ、更に、何れの可動アームによって溶接
を行っても、その開放時に中間アームをイコライズ動作
させることができ、而もその構成はガンブラケットと共
通アームとの一方にストッパピンと他方に長溝とを形成
すれば足り、構造を簡素化できる効果を有する。
(Effects of the Invention) As is apparent from the above description, according to the first aspect of the present invention, a pair of movable arms are selectively closed using a simple pressurizing cylinder having a single piston. This eliminates the need for an interlock device as in the prior art, makes it possible to obtain a selectively operated double-headed welding gun device with a simple structure and at low cost. The equalizing operation of the intermediate arm can be performed, and it is sufficient to form a stopper pin on one of the gun bracket and the common arm and a long groove on the other, which has an effect of simplifying the structure.

又、請求項2の発明によれば、何れの可動アームを選
択して溶接を行っても、選択された可動アームを異常時
に自動的に開くことが可能となり、異常時の対処が容易
になる効果を有する。
Further, according to the second aspect of the present invention, it is possible to automatically open the selected movable arm when an abnormality occurs, regardless of which of the movable arms is selected for welding, and to easily cope with the abnormality. Has an effect.

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

第1図は本発明装置の1例の側面図、第2図は第1図の
左側面図、第3図は第1図の底面図、第4図及び第5図
は夫々第1図のIV−IV線及びV−V線截断面図、第6図
は加圧シリンダの回路図である。 (3)……ガンブラケット (4)……枢軸 (5)……中間アーム (5a)(5b)……電極 (6)……共通アーム (61)(62)……可動アーム (6a)(6b)……電極 (10)……加圧シリンダ (10a)……ピストン (10b)……ピストンロッド (11)……ストッパピン (12)……長溝 (17)……選択用切換弁 (18)……開閉用切換弁
1 is a side view of an example of the apparatus of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is a bottom view of FIG. 1, and FIGS. 4 and 5 are FIG. FIG. 6 is a circuit diagram of a pressurizing cylinder cut along a line IV-IV and a line VV. (3) .... Cancer bracket (4) ...... pivot (5) ...... intermediate arm (5a) (5b) ...... electrode (6) ... common arm (61) (6 2) ...... movable arm (6a ) (6b) Electrode (10) Pressurized cylinder (10a) Piston (10b) Piston rod (11) Stopper pin (12) Long groove (17) Switching valve for selection (18)… Switching valve for opening and closing

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】先端部に1対の電極を互に異なる向きに取
付けた中間アームと、先端部に中間アームの各電極に対
向する各1個の電極を取付けた1対の可動アームとを備
え、両可動アームの何れか一方を中間アームに対し選択
的に閉じ動作させるようにした双頭式溶接ガン装置にお
いて、両可動アームを一体化した二股形状の共通アーム
を形成して、中間アームに該共通アームを、該共通アー
ムの正逆の揺動で両可動アームの一方と他方とが中間ア
ームに対し交互に閉じ動作されるように枢支し、中間ア
ームと共通アームとの一方の尾端部に、他方の尾端部に
ピストンロッドを介して連結される単一のピストンを内
蔵する加圧シリンダを取付けると共に、該中間アームと
該共通アームとを共通の枢軸を介して枢支したガンブラ
ケットを設け、該ガンブラケットと共通アームとの一方
にストッパピンと、他方に該ピンに係合して共通アーム
の揺動範囲を規制する長溝とを形成したことを特徴とす
る双頭式溶接ガン装置。
1. An intermediate arm having a pair of electrodes attached to the tip in different directions, and a pair of movable arms having an electrode opposed to each electrode of the intermediate arm at the tip. In a double-headed welding gun device provided with one of the two movable arms to selectively close the intermediate arm, a bifurcated common arm integrating the two movable arms is formed, and The common arm is pivotally supported such that one and the other of the two movable arms are alternately closed with respect to the intermediate arm by forward and reverse swinging of the common arm, and one tail of the intermediate arm and the common arm. At the end, a pressurized cylinder containing a single piston connected to the other tail end via a piston rod was attached, and the intermediate arm and the common arm were pivotally supported via a common pivot. Provide a gun bracket, And one to the stopper pin of the down bracket and the common arm, double-head welding gun apparatus characterized by the formation of the long groove Metropolitan for regulating the swing range of the common arm engages on the pin on the other.
【請求項2】前記加圧シリンダの流体圧回路に一対の切
換弁を直列に介入し、一方の切換弁を前記両可動アーム
の何れを閉じ動作させるかを選択する選択用切換弁、他
方の切換弁を選択された可動アームを開閉する開閉用切
換弁として用い、該開閉用切換弁を、スプリングオフセ
ット単一ソレノイド型の電磁弁であって、選択された可
動アームを開く切換位置にスプリングによって付勢保持
されるように構成したことを特徴とする請求項1に記載
の双頭式溶接ガン装置。
2. A selection switching valve for interposing a pair of switching valves in series in a fluid pressure circuit of the pressurizing cylinder, and selecting one of the two movable arms to close one switching valve and the other of the two movable arms. The switching valve is used as an opening / closing switching valve for opening and closing the selected movable arm, and the opening / closing switching valve is a spring offset single solenoid type solenoid valve, and a spring is provided at a switching position for opening the selected movable arm. The double-headed welding gun device according to claim 1, wherein the double-headed welding gun device is configured to be biased and held.
JP2264272A 1990-10-02 1990-10-02 Double-head welding gun device Expired - Fee Related JP2759555B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2264272A JP2759555B2 (en) 1990-10-02 1990-10-02 Double-head welding gun device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2264272A JP2759555B2 (en) 1990-10-02 1990-10-02 Double-head welding gun device

Publications (2)

Publication Number Publication Date
JPH04143080A JPH04143080A (en) 1992-05-18
JP2759555B2 true JP2759555B2 (en) 1998-05-28

Family

ID=17400865

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2264272A Expired - Fee Related JP2759555B2 (en) 1990-10-02 1990-10-02 Double-head welding gun device

Country Status (1)

Country Link
JP (1) JP2759555B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102049581B (en) * 2010-11-15 2013-04-03 贵州天义电器有限责任公司 Method for welding d two contact points and contact piece of contactor and special electrode

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63122771U (en) * 1987-01-28 1988-08-10
JPH02123380U (en) * 1989-03-15 1990-10-11

Also Published As

Publication number Publication date
JPH04143080A (en) 1992-05-18

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