【考案の詳細な説明】[Detailed explanation of the idea]
〔産業上の利用分野〕
本考案は、被覆溶接棒製造工程に用いられる溶
接棒の端部処理用ベルトに関する。
〔従来の技術〕
被覆溶接棒の製造工程では心線に被覆剤を塗装
し、被覆溶接棒の一端の被覆を円錐面状に研磨し
て心線を露出させ、他端の被覆は所定長に亘つて
除去して心線を露出させ、ホルダで挟んで通電可
能にする、あるいはアーク発生用剤を先端に塗布
する等の端部処理を行なう。
この被覆溶接棒の端部処理には第３図に示す如
き装置が使用される。この図で１０は被覆溶接
棒、１２は溶接棒１０を搬送するコンベアベル
ト、１４はコンベアベルト１２上の溶接棒１０を
上から抑え、かつコンベア１２と同方向にしかし
更に高速に回転して溶接棒を回転させる加速ベル
トで、これらにより溶接棒は搬送されながら回転
する。そして溶接棒１０がコンベアベルト１２と
加速ベルト１４に挟まれて回転しながら搬送され
る間に溶接棒１０の端部は上記処理を施される。
２２は端部処理部への溶接棒１０の搬入コンベ
ア、２４は同搬出コンベアである。なお第３図の
装置では、図示しないが装置の向こう側には一対
のバフが設けられ、回転中のバフの間を溶接棒１
０が回転しながら通過すると端部の被覆は所定長
に亘つて剥離される。又装置の手前側には周面に
溝が付けられたローラが設けられ、回転中の該ロ
ーラを溶接棒１０が通ると、端部の被覆が除去さ
れて心線が露出し、被覆端面が円錐状になる。
コンベアベルト１２、加速ベルト１４は、第４
図に示すようにゴム製のエンドレスベルト１ａ，
１ｂにスポンジ２ａ，２ｂを接着したもので、ベ
ルト１２，１４の該スポンジ２ａ，２ｂ間に溶接
棒１０が図示の如く挟持されて回転、搬送され
る。スポンジ２ａ，２ｂはそのクツシヨン作用に
より塗装直後の溶接棒の被覆を保護する。ベルト
１２，１４間の間隙ｌは溶接棒１０の外径（被覆
外径）の1/2〜3/4で、その調整は加速ベルト１４
の上下移動により行なう。
〔考案が解決しようとする課題〕
このような従来技術では
・ スポンジ表面の凹部に軟弱な被覆剤が付着、
残留し易く、この付着した被着剤が経済的に硬
化して溶接棒の被覆剤に疵を発生させ、歩留低
下、品質悪化をもたらす。
・ 挟持力の調節はベルト間の間隙ｌの調整すな
わち加速ベルトの上下動だけによるためシビア
な調節が出来にくい、間隙ｌが狭過ぎると低水
素系、高合金系、低合金系等のより軟弱な被覆
はつぶれてしまい、逆に間隙ｌが広過ぎると必
要な挟持力が得られず、回転中にバフに引き込
まれる。
本考案は、かゝる欠点を解消するために案出さ
れたものである。
〔課題を解決するための手段〕
本考案と特徴とするところは、エンドレスベル
ト上にガス封入チユーブ、ゴムシートを順次積層
した構造とし、該ゴムシートを被覆溶接棒の接触
面とした被覆溶接棒の端部処理用ベルトにある。
〔実施例〕
第１図に本考案の一具体例を示す。６は溶接棒
１０を搬送するコンベアベルトで、このコンベア
ベルト６はエンドレスベルト３ａ、ガス封入チユ
ーブ４ａおよびゴムシート５ａを順次積層した構
造となつている。エンドレスベルト３はゴム製の
周知のベルト、ガス封入チユーブ４ａはゴム製、
合成皮革製等のチユーブにエアー等のガスを封入
してクツシヨン性をもたせた帯状のチユーブで、
チユーブ４ａの天面と底面が内部のガス圧の大小
にかかわらず常に平行を維持するように所定間隔
ごとにチユーブ本体と同一材質の仕切壁８を設け
ている。そしてこの仕切壁はその長手方向に複数
個の通気孔９を有し、チユーブ４ａの内圧が各部
均一になるようにしている。チユーブ４ａは例え
ば一体物として成形する、あるいは長尺の円筒チ
ユーブを複数個用意し、その側面の長手方向に複
数個の通気孔をあけて側面同志を接着する等によ
り得られる。また図示しないがチユーブ４ａの側
面の適所にガス注入口を設けていてチユーブ内圧
を必要に応じて変化させ得るようにしている。こ
のような帯状のチユーブ４ａは内圧により断面が
幅方向に凹凸を呈するからこれを均一にするため
にその上面（溶接棒を挟持する側）にゴムシート
５ａを貼着する。ゴムシート５ａの表面には図示
の如く溶接棒１０が接触するので、軟弱な被覆剤
の付着、残留を防止しかつチユーブ４ａのクツシ
ヨンが有効に作用するようになめらかかつしなや
かな性状のゴム（例えば潜水服用のゴム）を使用
する。加速ベルト７の構造も上記コンベアベルト
６と全く同様であり、このようなコンベアベルト
６と加速ベルト７とで第２図に示すように溶接棒
１０を挟持し回転、搬送する。ベルト６，７はガ
ス封入チユーブ４ａ，４ｂのクツシヨン作用によ
り溶接棒１０の軟弱な被覆を変形させることはな
く、又溶接棒１０に接触するゴムシート５ａ，５
ｂのなめらかな表面性状により被覆剤を剥離して
付着、残留する等の弊害は生じない。
又本考案によれば溶接棒の挟持力の調節はベル
ト間の間隙ｌの調整の他チユーブ内圧の調整によ
つても行なえるのでシビアな調節が可能になり軟
弱で形状がくずれ易い被覆を有する溶接棒の端部
処理用ベルトとしては最適である。チユーブ内圧
は溶接棒径（心線径）、被覆剤の種別、被覆剤の
塗装状況（大気温度、湿度、固着剤比率、塗装圧
力等）およびベルト間の間隙等により設定する
が、溶接棒径（心線径）、被覆剤の種類に対応す
るチユーブ内圧の一応の目安を第１表に示す。こ
の表のチユーブはエーアを封入したゴム製のチユ
ーブである。
[Industrial Application Field] The present invention relates to a belt for treating the ends of welding rods used in the manufacturing process of coated welding rods. [Prior art] In the manufacturing process of coated welding rods, the core wire is coated with a coating material, the coating at one end of the coated welding rod is polished into a conical shape to expose the core wire, and the coating at the other end is polished to a predetermined length. The ends are treated by removing the core wires to expose the core wires and sandwiching them between holders to enable electricity to flow, or by applying an arc generating agent to the tips. A device as shown in FIG. 3 is used to treat the ends of the coated welding rod. In this figure, 10 is a coated welding rod, 12 is a conveyor belt that conveys the welding rod 10, and 14 is a conveyor belt that holds the welding rod 10 on the conveyor belt 12 from above, and rotates in the same direction as the conveyor 12 but at a higher speed for welding. The welding rod rotates while being conveyed by an acceleration belt that rotates the rod. The end portion of the welding rod 10 is subjected to the above-described treatment while the welding rod 10 is being conveyed while being rotated between the conveyor belt 12 and the acceleration belt 14.
22 is a conveyor for carrying the welding rod 10 into the end processing section, and 24 is a conveyor for carrying it out. In addition, in the apparatus shown in FIG. 3, a pair of buffs are provided on the other side of the apparatus (not shown), and a welding rod 1 is inserted between the rotating buffs.
0 passes through while rotating, the coating on the end portion is peeled off over a predetermined length. In addition, a roller with a groove on the circumferential surface is provided on the front side of the device, and when the welding rod 10 passes through the rotating roller, the coating at the end is removed and the core wire is exposed, and the coated end surface is exposed. It becomes conical. The conveyor belt 12 and the acceleration belt 14 are
As shown in the figure, a rubber endless belt 1a,
A welding rod 10 is held between the sponges 2a and 2b of belts 12 and 14 as shown in the figure, and rotated and conveyed. The sponges 2a and 2b protect the coating of the welding rod immediately after painting by their cushioning action. The gap l between the belts 12 and 14 is 1/2 to 3/4 of the outer diameter (covered outer diameter) of the welding rod 10, and its adjustment is made using the accelerator belt 14.
This is done by moving up and down. [Problems to be solved by the invention] In such conventional technology, the soft coating material adheres to the concave parts of the sponge surface.
It tends to remain, and this adhered adhesive hardens economically, causing flaws in the coating material of the welding rod, resulting in lower yield and quality deterioration.・ The clamping force can be adjusted only by adjusting the gap l between the belts, i.e. by moving the accelerator belt up and down, so severe adjustment is difficult. On the other hand, if the gap l is too wide, the necessary clamping force will not be obtained and the coating will be drawn into the buff during rotation. The present invention has been devised to eliminate such drawbacks. [Means for Solving the Problems] The present invention is characterized by a coated welding rod that has a structure in which a gas-filled tube and a rubber sheet are sequentially laminated on an endless belt, and the rubber sheet is used as the contact surface of the coated welding rod. It is on the edge treatment belt. [Example] FIG. 1 shows a specific example of the present invention. A conveyor belt 6 conveys the welding rod 10, and the conveyor belt 6 has a structure in which an endless belt 3a, a gas-filled tube 4a, and a rubber sheet 5a are sequentially laminated. The endless belt 3 is a well-known belt made of rubber, and the gas-filled tube 4a is made of rubber.
A band-shaped tube made of synthetic leather or the like that is filled with gas such as air to give it cushioning properties.
Partition walls 8 made of the same material as the tube body are provided at predetermined intervals so that the top and bottom surfaces of the tube 4a always remain parallel regardless of the magnitude of the internal gas pressure. This partition wall has a plurality of ventilation holes 9 in its longitudinal direction, so that the internal pressure of the tube 4a is uniform in each part. The tube 4a can be obtained, for example, by molding it as a single piece, or by preparing a plurality of long cylindrical tubes, making a plurality of ventilation holes in the longitudinal direction of their side surfaces, and gluing the side surfaces together. Further, although not shown, a gas inlet is provided at a suitable position on the side surface of the tube 4a so that the internal pressure of the tube can be changed as necessary. Since such a band-shaped tube 4a has an uneven cross section in the width direction due to internal pressure, a rubber sheet 5a is attached to its upper surface (the side on which the welding rod is held) to make the unevenness uniform. Since the welding rod 10 comes into contact with the surface of the rubber sheet 5a as shown in the figure, it is possible to prevent the soft coating material from adhering or remaining and to make the cushion of the tube 4a work effectively using a smooth and pliable rubber (e.g. Use rubber from diving suits. The structure of the accelerating belt 7 is exactly the same as the conveyor belt 6 described above, and the welding rod 10 is sandwiched between the conveyor belt 6 and the accelerating belt 7 as shown in FIG. 2, and is rotated and conveyed. The belts 6, 7 do not deform the soft covering of the welding rod 10 due to the cushioning action of the gas-filled tubes 4a, 4b, and the rubber sheets 5a, 5 in contact with the welding rod 10 do not deform the soft covering of the welding rod 10.
Due to the smooth surface properties of (b), there will be no problems such as peeling off the coating and sticking or remaining. Furthermore, according to the present invention, the clamping force of the welding rod can be adjusted not only by adjusting the gap 1 between the belts but also by adjusting the tube internal pressure, making severe adjustment possible and eliminating the need for a coating that is soft and easily deformed. Ideal as a belt for treating the ends of welding rods. The tube internal pressure is set based on the welding rod diameter (core wire diameter), the type of coating material, the coating conditions of the coating material (atmospheric temperature, humidity, adhesive ratio, coating pressure, etc.), the gap between the belts, etc. (core wire diameter) and tube internal pressure corresponding to the type of coating material are shown in Table 1. The tube in this table is a rubber tube filled with air.
〔考案の効果〕[Effect of idea]
本考案によれば、被覆溶接棒の被覆が剥離して
端部処理用ベルトに付着、残留することはなく、
さらに良好なクツシヨン作用により溶接棒の被覆
を変形させることなく、塗装直後の断面形状（真
円）を保持する。又溶接棒の挟持力の調整はベル
ト間の間隙の調整の他チユーブ内圧の調整によつ
ても行なえるのでシビアな調節が可能である。
こうして本考案によれば品質の安定、向上、歩
留りの向上、稼働率の向上が得られる。
According to the present invention, the coating of the coated welding rod does not peel off and adhere to or remain on the end treatment belt.
Furthermore, the good cushioning action maintains the cross-sectional shape (perfect circle) immediately after coating without deforming the coating of the welding rod. Further, the clamping force of the welding rod can be adjusted not only by adjusting the gap between the belts but also by adjusting the tube internal pressure, so that severe adjustment is possible. In this way, according to the present invention, it is possible to stabilize and improve quality, increase yield, and improve operating rate.
【図面の簡単な説明】[Brief explanation of the drawing]
第１図は本考案ベルトの断面斜視図、第２図は
溶接棒の回転、搬送装置の説明図、第３図は端部
処理装置の斜視図、そして第４図は従来ベルトの
説明図である。
図面で１０は被覆溶接棒、６，１２はコンベア
ベルト、７，１４は加速ベルト、４ａ，４ｂはガ
ス封入チユーブ、５ａ，５ｂはゴムシートであ
る。
Fig. 1 is a cross-sectional perspective view of the belt of the present invention, Fig. 2 is an explanatory view of the rotation of the welding rod and the conveying device, Fig. 3 is a perspective view of the end treatment device, and Fig. 4 is an explanatory view of the conventional belt. be. In the drawing, 10 is a coated welding rod, 6 and 12 are conveyor belts, 7 and 14 are acceleration belts, 4a and 4b are gas-filled tubes, and 5a and 5b are rubber sheets.