JPH0130449Y2 - - Google Patents
Info
- Publication number
- JPH0130449Y2 JPH0130449Y2 JP15434384U JP15434384U JPH0130449Y2 JP H0130449 Y2 JPH0130449 Y2 JP H0130449Y2 JP 15434384 U JP15434384 U JP 15434384U JP 15434384 U JP15434384 U JP 15434384U JP H0130449 Y2 JPH0130449 Y2 JP H0130449Y2
- Authority
- JP
- Japan
- Prior art keywords
- web
- roller
- drag
- flat
- tension
- 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
Links
- 230000002093 peripheral effect Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は輪転印刷機で使用されるドラグローラ
及び押付ローラの改良に関するものである。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to improvements in drag rollers and pressing rollers used in rotary printing presses.
（従来の技術）
輪転印刷機では、ウエブのテンシヨンが低すぎ
ると蛇行し、高過ぎると、しわ及び断紙の原因に
なるので、ウエブのテンシヨンは、常にある一定
の範囲内に保つことが必要で、ウエブの搬送及び
ウエブテンシヨンの制御にドラグローラが使用さ
れている。従来のドラグローラを第３，４，５図
により説明すると、１がウエブ（走行紙）、２が
円周方向外周面の全域に多数の平行な溝２ａを設
けたドラグローラ、３が押付ローラで、ウエブ１
はドラグローラ２上で押付ローラ３により押えら
れ、ドラグローラ２と押付ローラ３との摩擦力に
よりけん引されて、所定のテンシヨンを保ちなが
ら次工程へ搬送される。このようにウエブ１のテ
ンシヨンを所定の値に保つために、ウエブ１を押
付ローラ３によりドラグローラ２に押付けてい
る。このとき、ウエブ１によりドラグローラ２と
の間に巻き込まれたエアを逃がして、ウエブ１と
ドラグローラ２との摩擦力の低下を防止するため
に、ドラグローラ２の外周面の軸方向全域に多数
の平行な溝２ａが設けられている。なお押付ロー
ラ３は、印刷された部分を押えると、印刷物に汚
れが発生するため、非印刷部しか押えない。(Prior art) In a rotary printing press, if the web tension is too low, it will meander, and if it is too high, it will cause wrinkles and paper breaks, so the web tension must always be kept within a certain range. A drag roller is used to convey the web and control web tension. Conventional drag rollers are explained with reference to FIGS. 3, 4, and 5. 1 is a web (running paper), 2 is a drag roller provided with a large number of parallel grooves 2a all over the circumferential outer peripheral surface, and 3 is a pressing roller. web 1
is held down by the pressing roller 3 on the drag roller 2, and is pulled by the frictional force between the drag roller 2 and the pressing roller 3, and is conveyed to the next process while maintaining a predetermined tension. In this manner, in order to maintain the tension of the web 1 at a predetermined value, the web 1 is pressed against the drag roller 2 by the pressing roller 3. At this time, in order to release the air caught between the web 1 and the drag roller 2 and prevent a decrease in the frictional force between the web 1 and the drag roller 2, a large number of parallel A groove 2a is provided. Note that the pressing roller 3 can only press the non-printed portions because pressing the printed portions will stain the printed matter.
（考案が解決しようとする問題点）
前記第３，４，５図の輪転印刷機では、ウエブ
１のテンシヨンを高くしたい場合、押付ローラ３
の押付力をそれに対応して強くすればよいが、あ
まり強くすると、ドラグローラ２の外周面に設け
た溝２ａの跡がウエブ１に残るため、押付力をあ
る程度以上に強くすることができず、ウエブ１の
テンシヨンの調節範囲に限界があつて、ウエブ１
のテンシヨン値を広い範囲で制御できないという
問題があつた。(Problems to be solved by the invention) In the rotary printing presses shown in FIGS. 3, 4, and 5, when it is desired to increase the tension of the web 1, the pressing roller 3
The pressing force may be increased accordingly, but if it is too strong, the grooves 2a provided on the outer peripheral surface of the drag roller 2 will leave marks on the web 1, so the pressing force cannot be increased beyond a certain level. There is a limit to the adjustment range of the tension of web 1.
There was a problem that the tension value could not be controlled over a wide range.
（問題点を解決するための手段）
本考案は前記の問題点に対処するもので、円周
方向外周面が平らなフラツト部と円周方向外周面
に多数の平行な溝を設けた溝加工部とを軸方向に
隣接して形成したドラグローラと、同ドラグロー
ラのフラツト部を加圧する押付ローラとを具えて
いることを特徴とした輪転印刷機に係り、その目
的とする処は、ドラグローラ及び押付ローラによ
るウエブテンシヨンの制御範囲を広くできる。ま
た押付ローラの押付力によりウエブに生じていた
溝の跡をなくすことができる改良された輪転印刷
機を供する点にある。(Means for Solving the Problems) The present invention addresses the above-mentioned problems, and consists of a flat part with a flat outer peripheral surface in the circumferential direction and a groove processing in which a large number of parallel grooves are provided on the outer peripheral surface in the circumferential direction. A rotary printing press characterized by comprising a drag roller formed adjacent to a flat part in the axial direction, and a pressing roller that presses a flat part of the drag roller. The control range of the web tension by the roller can be widened. Another object of the present invention is to provide an improved rotary printing press that can eliminate groove marks caused on the web by the pressing force of the pressing roller.
（実施例）
次に本考案の輪転印刷機を第１，２図に示す一
実施例により説明すると、１がウエブ、２がドラ
グローラで、同ドラグローラ２には、円周方向外
周面が平らなフラツト部５と円周方向外周面に多
数の平行な溝を設けた溝加工部４とが軸方向に隣
接して交互に形成されている。また３が押付ロー
ラで、同押付ローラ３がウエブ１を上記ドラグロ
ーラ２のフラツト部５に押付けるようになつてい
る。(Embodiment) Next, the rotary printing press of the present invention will be explained with reference to an embodiment shown in FIGS. Flat portions 5 and grooved portions 4 in which a large number of parallel grooves are provided on the circumferential outer peripheral surface are alternately formed adjacent to each other in the axial direction. Further, reference numeral 3 denotes a pressing roller, and the pressing roller 3 presses the web 1 against the flat portion 5 of the drag roller 2.
（作用）
次に前記第１，２図の輪転印刷機の作用を説明
する。ウエブ１はドラグローラ２の外周面に押付
ローラ３により押付けられ、適正なテンシヨン値
に保たれて、次工程へ搬送される。このとき、ウ
エブ１のテンシヨンが低すぎると蛇行し、高過ぎ
ると、断紙及びシワを発生させるので、テンシヨ
ン値は常に適正範囲内に保つ必要があるが、本考
案では、ドラグローラ２の外周面に溝加工部４と
フラツト部５とを交互に形成しており、同溝加工
部４はウエブ１が巻き込んだエアを逃がして、ウ
エブ１とドラグローラ２表面との摩擦力の低下を
防止し、また押付ローラ３がウエブ１を同フラツ
ト部５に押付けて、ウエブ１のテンシヨンを制御
する。なお、ドラグローラ２の外周面の一部をフ
ラツトにしても、ウエブ１との摩擦係数は、ドラ
グローラ２の外周面全域に溝加工した場合に比べ
て数〜数拾％しか低下しない。(Function) Next, the function of the rotary printing press shown in FIGS. 1 and 2 will be explained. The web 1 is pressed against the outer peripheral surface of the drag roller 2 by a pressing roller 3, maintained at an appropriate tension value, and conveyed to the next process. At this time, if the tension of the web 1 is too low, it will meander, and if it is too high, it will cause paper breakage and wrinkles, so the tension value must always be kept within an appropriate range. Grooved portions 4 and flat portions 5 are alternately formed, and the grooved portions 4 allow air trapped by the web 1 to escape and prevent a decrease in the frictional force between the web 1 and the surface of the drag roller 2. Further, the pressing roller 3 presses the web 1 against the flat portion 5 to control the tension of the web 1. Note that even if a part of the outer peripheral surface of the drag roller 2 is made flat, the coefficient of friction with the web 1 is reduced by only a few to several tens of percent compared to a case where the entire outer peripheral surface of the drag roller 2 is grooved.
（考案の効果）
本考案の輪転印刷機は前記のように円周方向外
周面が平らなフラツト部と円周方向外周面に多数
の平行な溝を設けた溝加工部とを軸方向に隣接し
て形成したドラグローラと、同ドラグローラのフ
ラツト部を加圧する押付ローラとを具えており、
押付ローラがウエブを介しドラグローラのフラツ
ト部を加圧するので、押付力を強くしても、ウエ
ブに溝の跡が残らず、従来の外周面全域に溝を設
けたドラグローラに比らべてウエブテンシヨンの
制御範囲を大幅に拡大できる。また上記のように
ウエブに溝の跡が残らないので、ウエブを良好な
状態に保持できる効果がある。(Effect of the invention) As described above, the rotary printing press of the invention has a flat part with a flat circumferential outer peripheral surface and a grooved part with a large number of parallel grooves on the circumferential outer peripheral surface adjacent to each other in the axial direction. It is equipped with a drag roller formed by the same method, and a pressing roller that presses the flat part of the drag roller.
Since the pressing roller presses the flat part of the drag roller through the web, even if the pressing force is strong, no trace of grooves will remain on the web, and the web tension is better compared to conventional drag rollers that have grooves all over the outer circumferential surface. The range of control can be greatly expanded. Further, as mentioned above, since no traces of grooves remain on the web, there is an effect that the web can be maintained in a good condition.
第１図は本考案に係る輪転印刷機の一実施例を
示す側面図、第２図はドラグローラの拡大正面
図、第３図は従来の輪転印刷機の側面図、第４図
は第３図の矢印部分の拡大側面図、第５図は第
３図の矢印方向からみた平面図である。
１……ウエブ、２……ドラグローラ、３……押
付ローラ、４……溝加工部、５……フラツト部。
FIG. 1 is a side view showing an embodiment of a rotary printing press according to the present invention, FIG. 2 is an enlarged front view of a drag roller, FIG. 3 is a side view of a conventional rotary printing press, and FIG. 4 is a side view of a conventional rotary printing press. FIG. 5 is an enlarged side view of the arrowed portion, and FIG. 5 is a plan view seen from the direction of the arrow in FIG. 1...Web, 2...Drag roller, 3...Press roller, 4...Groove processing section, 5...Flat section.
Claims (1)
外周面に多数の平行な溝を設けた溝加工部とを軸
方向に隣接して形成したドラグローラと、同ドラ
グローラのフラツト部を加圧する押付ローラとを
具えていることを特徴とした輪転印刷機。 A drag roller in which a flat part with a flat circumferential outer circumferential surface and a grooved part with a large number of parallel grooves on the circumferential outer circumferential surface are formed adjacent to each other in the axial direction, and a presser that presses the flat part of the drag roller. A rotary printing press characterized by being equipped with a roller.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15434384U JPH0130449Y2 (en) | 1984-10-15 | 1984-10-15 | |
| DE3590509A DE3590509C2 (en) | 1984-10-12 | 1985-10-09 | |
| US06/871,437 US4722275A (en) | 1984-10-12 | 1985-10-09 | Web tension control apparatus for use with a rotary press |
| PCT/JP1985/000560 WO1986002339A1 (en) | 1984-10-12 | 1985-10-09 | Device for controlling tension of a rotary printing press |
| DE19853590509 DE3590509T1 (en) | 1984-10-12 | 1985-10-09 | Web tension control device for a rotary printing press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15434384U JPH0130449Y2 (en) | 1984-10-15 | 1984-10-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6172550U JPS6172550U (en) | 1986-05-17 |
| JPH0130449Y2 true JPH0130449Y2 (en) | 1989-09-18 |
Family
ID=30712341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15434384U Expired JPH0130449Y2 (en) | 1984-10-12 | 1984-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0130449Y2 (en) |
-
1984
- 1984-10-15 JP JP15434384U patent/JPH0130449Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6172550U (en) | 1986-05-17 |
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