JP2018086788A - Printing plate cylinder - Google Patents
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- JP2018086788A JP2018086788A JP2016231295A JP2016231295A JP2018086788A JP 2018086788 A JP2018086788 A JP 2018086788A JP 2016231295 A JP2016231295 A JP 2016231295A JP 2016231295 A JP2016231295 A JP 2016231295A JP 2018086788 A JP2018086788 A JP 2018086788A
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- 238000001816 cooling Methods 0.000 claims abstract description 75
- 230000002093 peripheral effect Effects 0.000 claims abstract description 50
- 239000012809 cooling fluid Substances 0.000 claims abstract description 37
- 239000012530 fluid Substances 0.000 abstract description 16
- 230000007423 decrease Effects 0.000 description 4
- 238000012856 packing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
Description
本発明は、外周面に刷版を装着可能な印刷用版胴に関するものであり、より詳細には、印刷時の版胴外周面の温度制御が可能な印刷用版胴に関する。 The present invention relates to a printing plate cylinder capable of mounting a printing plate on its outer peripheral surface, and more particularly to a printing plate cylinder capable of controlling the temperature of the outer peripheral surface of a plate cylinder during printing.
高い印刷精度を維持しつつ高速で印刷を行うためには、インキ粘度を一定に維持することが重要であり、インキ粘度が低下すると、刷り濃度が不安定となり、特に水なし平版印刷や網点印刷の場合、非画線部にインキが付着しやすくなり、地汚れの原因となるため、印刷用版胴の温度管理が重要である。
しかしながら、印刷機の運転開始直後は、特に冬季などの低温時には、雰囲気温度の低下により版胴表面も冷えた状態にあるため、長時間の空運転が必要になる場合がある。その一方、印刷用版胴は印刷中の高速回転による回転軸からの熱伝導などによって温度が上昇する結果、刷版の温度も上昇してしまい、インキ粘度が低下する傾向にある。
In order to perform printing at high speed while maintaining high printing accuracy, it is important to keep the ink viscosity constant. When the ink viscosity decreases, the printing density becomes unstable, especially waterless lithographic printing and halftone dots. In the case of printing, the ink tends to adhere to the non-image area and causes soiling. Therefore, temperature control of the printing plate cylinder is important.
However, immediately after the start of the operation of the printing press, particularly when the temperature is low such as in winter, the surface of the plate cylinder is also cooled due to a decrease in the atmospheric temperature. On the other hand, the temperature of the printing plate cylinder rises due to heat conduction from the rotating shaft caused by high-speed rotation during printing. As a result, the temperature of the printing plate also rises and the ink viscosity tends to decrease.
このような問題を解決するために、版胴内部のハブ外周面をテーパ状に形成することによって版胴内部を通過する空気流を発生させて版胴を空冷することが提案されている（特許文献１）。
また印刷用版胴の内部に流体循環空間が形成され、この空間内に温度制御流体を循環させる流体循環手段と、版胴の温度に応じて温度制御流体の温度を制御する温度制御手段が設けられた印刷機が提案されており、この印刷機においては、外側円筒部と内側筒部の間の両端を密閉する端壁によって区画された空間を仕切壁によって複数の空間に分割し、これを連通孔で連通して流体循環空間を形成し、温度制御された流体を循環させることにより、版胴の温度制御を行っている（特許文献２）。
In order to solve such a problem, it has been proposed to form an air flow passing through the inside of the plate cylinder by forming the outer peripheral surface of the hub inside the plate cylinder in a tapered shape to air-cool the plate cylinder (patent) Reference 1).
A fluid circulation space is formed inside the printing plate cylinder. A fluid circulation means for circulating the temperature control fluid in the space and a temperature control means for controlling the temperature of the temperature control fluid according to the temperature of the plate cylinder are provided. In this printing machine, a space defined by an end wall that seals both ends between the outer cylindrical portion and the inner cylindrical portion is divided into a plurality of spaces by a partition wall. The temperature of the plate cylinder is controlled by communicating with a communication hole to form a fluid circulation space and circulating the temperature-controlled fluid (Patent Document 2).
上記特許文献１においては、直接的に版胴を冷却するものではないため、冷却効果の点で未だ充分満足するものではなかった。
また上記特許文献２記載の印刷機においては、外面に版装着面が取り付けられる外側円筒部と、駆動軸に隣接する内側筒部により構成される版胴内部によって流体循環空間が区画されているため、版胴内のほとんどの空間が流体循環空間を構成している。そのため、版胴内を流通する流体の量が多く、流体の満注状態で版胴を回転駆動すると、印刷機にかかる荷重も大きくなり、印刷機への負担が大きくなるおそれがあると共に、流体の温度制御にも時間がかかり効率的でない。また流体量が多いと流体の漏洩のおそれもある。
In the above-mentioned patent document 1, since the plate cylinder is not directly cooled, it has not been sufficiently satisfied in terms of the cooling effect.
Further, in the printing machine described in Patent Document 2, the fluid circulation space is partitioned by the inside of the plate cylinder constituted by the outer cylindrical portion to which the plate mounting surface is attached on the outer surface and the inner cylindrical portion adjacent to the drive shaft. Most of the space in the plate cylinder constitutes a fluid circulation space. Therefore, if the amount of fluid flowing through the plate cylinder is large, and the plate cylinder is driven to rotate in a fully-filled state of the fluid, the load applied to the printing machine also increases, which may increase the burden on the printing machine. Temperature control is also time consuming and inefficient. Also, if the amount of fluid is large, there is a risk of fluid leakage.
従って本発明の目的は、印刷時の版胴表面を少ない流体量で効率よく温度制御することが可能な冷却部材を備えて成る印刷用版胴を提供することである。 Accordingly, an object of the present invention is to provide a printing plate cylinder comprising a cooling member capable of efficiently controlling the temperature of the plate cylinder surface during printing with a small amount of fluid.
本発明によれば、外周面に刷版を装着可能な印刷用版胴において、前記版胴の内部には、版胴内周面と当接する冷却部材が設置されており、前記版胴内周面及び／又は冷却部材版胴との当接面には凹部が形成されており、該凹部を除く部分において版胴内周面と冷却部材が密着し、前記冷却部材には、前記凹部と連通する冷却流体の流入口及び流出口が形成されており、前記凹部形成部分によって、版胴外周面を冷却するための冷却流体の流路が形成されることを特徴とする印刷用版胴が提供される。 According to the present invention, in the printing plate cylinder on which the printing plate can be mounted on the outer peripheral surface, a cooling member that is in contact with the inner peripheral surface of the plate cylinder is installed inside the plate cylinder, and the inner periphery of the plate cylinder A concave portion is formed on the surface and / or the contact surface with the cooling member plate cylinder, and the inner peripheral surface of the plate cylinder and the cooling member are in close contact with each other except the concave portion, and the cooling member communicates with the concave portion. An inflow port and an outflow port for the cooling fluid to be formed are formed, and a flow path for the cooling fluid for cooling the outer peripheral surface of the plate cylinder is formed by the recess forming portion. Is done.
本発明の印刷用版胴においては、
１．前記冷却流体の流入口及び流出口が、版胴内部に設けられた冷却流体の流路と連通すること、
２．前記凹部が、複数の細分化された溝として形成されていること、
３．前記冷却部材の少なくとも外周部が、シール部材を介して版胴内周面と密着すること、
４．前記冷却部材の版胴当接面が、版胴内周面に沿った曲面状であること、
５．前記冷却部材がプレート状であり、前記版胴の直径と平行且つ該直径を挟んで対向して２か所に設置されていること、
が好適である。
In the printing plate cylinder of the present invention,
1. The cooling fluid inlet and outlet are in communication with a cooling fluid flow path provided inside the plate cylinder;
2. The recess is formed as a plurality of subdivided grooves;
3. At least the outer peripheral portion of the cooling member is in close contact with the inner peripheral surface of the plate cylinder via the seal member;
4). The plate cylinder contact surface of the cooling member is a curved surface along the inner peripheral surface of the plate cylinder,
5. The cooling member is plate-shaped, and is installed at two locations parallel to and opposite to the diameter of the plate cylinder;
Is preferred.
本発明の印刷用版胴においては、版胴内に、版胴内周面と当接する冷却部材が設置され、版胴内周面及び／又は冷却部材の版胴当接面に形成された凹部により冷却用流体の流路が形成されることにより、版胴表面に近い個所に冷却用流体の流路を形成することができるため、冷却効率を向上することができる。また少量の冷却用流体で所望の温度に版胴を効率よく冷却することが可能になるため、版胴の重量を軽減することが可能になると共に、冷却用流体の漏洩のおそれも低減する。
また凹部を細分化された溝として形成することにより、少量の冷却用流体で版胴を効率よく版胴を冷却できるだけでなく、冷却用流体に替えてエアを流入することにより、冷却用流体を流路から容易に排出することができ、版胴を取り外す際等に冷却用流体の漏洩や版胴が冷却用流体によって重くなることもない。
更に、本発明の印刷用版胴では、版胴に装着する刷版に対応して冷却部材を設置することにより、刷版に対応する位置の版胴表面の温度上昇を効率的に抑制することができ、インク粘度の低下等を有効に防止できる。
In the printing plate cylinder of the present invention, a cooling member that comes into contact with the inner peripheral surface of the plate cylinder is installed in the plate cylinder, and a recess formed on the inner peripheral surface of the plate cylinder and / or the plate cylinder contact surface of the cooling member. By forming the cooling fluid flow path, the cooling fluid flow path can be formed at a location close to the plate cylinder surface, so that the cooling efficiency can be improved. Further, since the plate cylinder can be efficiently cooled to a desired temperature with a small amount of cooling fluid, the weight of the plate cylinder can be reduced and the risk of leakage of the cooling fluid is also reduced.
Also, by forming the recesses as subdivided grooves, not only can the plate cylinder be efficiently cooled with a small amount of cooling fluid, but also the cooling fluid can be reduced by flowing in air instead of the cooling fluid. It can be easily discharged from the flow path, and when the plate cylinder is removed, the leakage of the cooling fluid and the plate cylinder are not heavy due to the cooling fluid.
Furthermore, in the printing plate cylinder of the present invention, by installing a cooling member corresponding to the printing plate mounted on the printing plate cylinder, the temperature rise of the plate cylinder surface at the position corresponding to the printing plate can be efficiently suppressed. It is possible to effectively prevent a decrease in ink viscosity.
本発明の印刷用版胴を、図に示す具体例に基づいて説明する。
図１は、本発明の版胴の一例を示す図であり、全体を１で示す版胴は、２つに分割された版胴外筒２ａ，２ｂがハブ３によって円筒状に組み合わされていると共に、ハブ３の版胴外筒２ａ，２ｂの接合部分には刷版（図示せず）を版胴外周面に装着するための固定部４が形成されている。この固定部４には、刷版の両端を挟持固定するためのクランプ５ａ，５ｂが形成されており、図に示す具体例では、２枚の刷版が版胴外周面に装着できるように形成されている。また、版胴１は片持回転軸２０に脱着可能に取り付けられており、図に示す具体例においては、片持回転軸２０は支持部側の径が大きく、自由端側に行くに従って径が小さくなるテーパ状になっていることから、ハブ３の軸受け部６も図面奥に向かって径が広くなるテーパ状に形成されている。
また版胴外筒２ａ，２ｂの内面には、後述する冷却部材を嵌合するための、冷却部材の形状に合致する嵌合部７ａ，７ｂが形成されている。
The printing plate cylinder of the present invention will be described based on the specific examples shown in the drawings.
FIG. 1 is a view showing an example of the plate cylinder of the present invention. In the plate cylinder shown as a whole, the plate cylinder outer cylinders 2 a and 2 b divided into two are combined in a cylindrical shape by a hub 3. At the same time, a fixing portion 4 for mounting a printing plate (not shown) on the outer peripheral surface of the plate cylinder is formed at the joint portion of the plate cylinder outer cylinders 2a and 2b of the hub 3. The fixing portion 4 is formed with clamps 5a and 5b for sandwiching and fixing both ends of the printing plate. In the specific example shown in the drawing, two printing plates can be mounted on the outer peripheral surface of the plate cylinder. Has been. Further, the plate cylinder 1 is detachably attached to the cantilever rotary shaft 20, and in the specific example shown in the figure, the cantilever rotary shaft 20 has a large diameter on the support portion side, and the diameter increases toward the free end side. Since the taper is reduced, the bearing portion 6 of the hub 3 is also formed in a taper having a diameter that increases toward the back of the drawing.
Further, on the inner surfaces of the plate cylinder outer cylinders 2a and 2b, fitting portions 7a and 7b are formed to fit the shape of the cooling member for fitting a cooling member described later.
図２は、本発明の版胴１に装着される冷却部材１０の一例の平面図（Ａ）及び（Ａ）のＺ−Ｚ線断面図（Ｂ）を示すものであり、この具体例において冷却部材１０は平板形状（プレート）を有しており、このプレートの一方の平面１０Ｒにジグザグ状に細溝１１が形成されている。この細溝１１の始端１１ａ及び終端１１ｂには、冷却部材１０のプレートを厚み方向に貫通する孔１２ａ及び１２ｂがそれぞれ設けられている。またプレートの細溝１１が形成されていない側の平面１０Ｌには、冷却部材１０を版胴外筒２ａ，２ｂに取り付ける際に、版胴外筒２ａ，２ｂにネジ等の締結具（図示せず）で固定するためのネジ穴１３，１３・・・が形成されたフランジ部１４が形成されている。 FIG. 2 shows a plan view (A) of an example of the cooling member 10 mounted on the plate cylinder 1 of the present invention and a cross-sectional view (B) taken along the line ZZ of FIG. The member 10 has a flat plate shape (plate), and a narrow groove 11 is formed in a zigzag shape on one flat surface 10R of the plate. Holes 12a and 12b that penetrate the plate of the cooling member 10 in the thickness direction are provided at the start end 11a and the end end 11b of the narrow groove 11, respectively. When the cooling member 10 is attached to the plate cylinder outer cylinders 2a and 2b, the plate cylinder outer cylinders 2a and 2b are attached to the plate cylinder outer cylinders 2a and 2b on the flat surface 10L on the side where the narrow grooves 11 of the plate are not formed (not shown). The flange portion 14 is formed with screw holes 13, 13.
図１に示すように、冷却部材１０は、細溝１１が形成された平面１０Ｒが版胴外筒２ａ，２ｂの内面と向かい合うように、版胴外筒２ａ，２ｂに形成された嵌合部７ａ，７ｂにそれぞれ嵌め込まれる。この際フランジ部１４と版胴外筒２ａ，２ｂの内面は、間に環状のパッキン１５を介して当接し、フランジ部１４に形成されたネジ穴１３，１３・・・の位置でネジ１６，１６・・・によって、冷却部材１０は版胴外筒内面に密着固定される。
版胴外筒２ａ，２ｂの内面２ｃと冷却部材１０の細溝１１が形成された平面１０Ｒが当接することによって、流入口となる孔１２ａから流出口となる孔１２ｂの間で、版胴外筒内面２ｃと細溝１１によって冷却部材１０に一つの流路１７が形成される。冷却用流体は孔１２ａ（流入口）に接続された導入管１８ａから流路１７内に導入され、孔１２ｂ（流出口）と接続された導出管１８ｂに流出し、冷却用流体が流路内を流通して、版胴外筒２ａ，２ｂを冷却することが可能になる。
As shown in FIG. 1, the cooling member 10 includes a fitting portion formed on the plate cylinder outer cylinders 2a and 2b so that the flat surface 10R on which the narrow grooves 11 are formed faces the inner surfaces of the plate cylinder outer cylinders 2a and 2b. 7a and 7b are fitted. At this time, the flange portion 14 and the inner surfaces of the plate cylinder outer cylinders 2a and 2b are in contact with each other via an annular packing 15, and screws 16 and 13 are formed at the positions of the screw holes 13, 13. 16 ..., the cooling member 10 is firmly fixed to the inner surface of the plate cylinder outer cylinder.
By contacting the inner surface 2c of the plate cylinder outer cylinders 2a and 2b with the flat surface 10R in which the narrow groove 11 of the cooling member 10 is formed, the outside of the plate cylinder is formed between the hole 12a serving as the inlet and the hole 12b serving as the outlet. One channel 17 is formed in the cooling member 10 by the cylinder inner surface 2 c and the narrow groove 11. The cooling fluid is introduced into the flow path 17 from the introduction pipe 18a connected to the hole 12a (inlet), and flows out to the outlet pipe 18b connected to the hole 12b (outlet). It is possible to cool the plate cylinder outer cylinders 2a and 2b.
版胴外筒２ａ側の冷却部材１０ａの孔１２ａ（流入口）と連通する導入管１８ａと版胴外筒２ｂ側の冷却部材１０ｂの孔１２ａ（流入口）と連通する導入管１８ａは、ハブ３の中央部付近で合流して、温度制御されたタンク（図示せず）に接続しており、このタンクからそれぞれの冷却部材１０ａ，１０ｂ中の流路１７に冷却用流体が導入される。同様に版胴外筒２ａ側の冷却部材１０ａの孔１２ｂ（流出口）と連通する導出管１８ｂと版胴外筒２ｂ側の冷却部材１０ｂの孔１２ｂ（流出口）と連通する導出管１８ｂは、ハブ３の中央部付近で合流し、冷却部材１０ａ，１０ｂ中の流路１７を通過した冷却用流体は外部に排出されるか、或いは温度調整された後、上記タンクに戻って、再び冷却部材の流路に流入されて循環使用することもできる。
冷却部材の流入口に通ずる導入管１８ａは、冷却用流体のタンクのみならず、エアタンク（図示せず）にも切り替え可能に接続されていることが好適である。エアタンクに切り替えて、流路内にエアを導入することにより、流路内の冷却用流体を排出して流路内を空の状態にすることが可能になり、版胴を取り外す際等に、冷却用流体の漏洩が有効に防止される。
The introduction pipe 18a communicating with the hole 12a (inlet) of the cooling member 10a on the plate cylinder outer cylinder 2a side and the introduction pipe 18a communicating with the hole 12a (inlet) of the cooling member 10b on the plate cylinder outer cylinder 2b side are provided as a hub. 3 are connected to a temperature-controlled tank (not shown), and a cooling fluid is introduced into the flow path 17 in each of the cooling members 10a and 10b. Similarly, a lead-out pipe 18b communicating with the hole 12b (outlet) of the cooling member 10a on the plate cylinder outer cylinder 2a side and a lead-out pipe 18b communicating with the hole 12b (outlet) of the cooling member 10b on the plate cylinder outer cylinder 2b side are The cooling fluid that merges near the center of the hub 3 and passes through the flow path 17 in the cooling members 10a and 10b is discharged to the outside or the temperature is adjusted and then returned to the tank and cooled again. It can also be circulated by flowing into the flow path of the member.
It is preferable that the introduction pipe 18a communicating with the inlet of the cooling member is connected not only to the cooling fluid tank but also to an air tank (not shown). By switching to an air tank and introducing air into the flow path, it becomes possible to discharge the cooling fluid in the flow path to make the flow path empty, and when removing the plate cylinder, etc. Leakage of the cooling fluid is effectively prevented.
本発明の印刷用版胴は、上述した具体例に限定されず、種々の変更が可能である。
［凹部］
上述した具体例においては、版胴を冷却するための冷却用流体の流路を形成するための凹部は、冷却部材の版胴外筒内面と当接する面に形成されていたが、版胴内周面に形成されていてもよい（以下、冷却部材及び版胴内周面のいずれの場合も凹部が形成されている面を「凹部形成面」ということがある）。この場合、冷却部材には、版胴内周面に形成された凹部に対応する位置に、流入口及び流出口となる孔のみを形成してもよいし、或いは流出入口の形成に加えて、胴内周面に形成された凹部と同一形状の凹部を版胴内周面に形成した凹部と合致する位置に形成して、版胴内周面に形成された凹部と共に流路を形成することもできる。
また凹部は、図に示した具体例のように細分化された溝とすることが、少量の冷却用流体を効率よく冷却面全面に流動させることが可能であり、多量の冷却用流体を使用することに起因する冷却用流体の漏洩や版胴の重量化を防止することができるので好適である。またこのような細溝とすることにより、版胴を取り外す際にエアを流入させることにより冷却用流体を流路から容易に排出することができる。
細溝の断面形状は、特に限定されず、角形状、Ｕ字形状、半円形状、Ｖ字形状など種々の形状を採用することができる。溝の大きさは、冷却部材の大きさや使用する冷却用流体の種類等によって一概に規定できないが、冷却用流体の流れやすさの点等から、流路の断面が１０〜１５０ｍｍ２、好ましくは２０〜１００ｍｍ２の範囲の断面積を有することが望ましい。
また冷却部材及び／又は版胴内周面に形成される凹部は、外周縁によって区画される全面を凹部としてもよく、この場合には、冷却面を大きくとることができる。また図に示した細分化された溝から成る流路においては、版胴の駆動軸方向に長い溝を有するジグザグ状の流路であったが、これに限定されず、版胴の駆動軸方向に対して直角方向（水平方向）に長い溝を有するジグザグ状等、種々の変更が可能である。
The printing plate cylinder of the present invention is not limited to the specific examples described above, and various modifications can be made.
[Concave]
In the specific example described above, the recess for forming the flow path for the cooling fluid for cooling the plate cylinder is formed on the surface of the cooling member that contacts the inner surface of the outer cylinder of the plate cylinder. It may be formed on the peripheral surface (hereinafter, the surface in which the concave portion is formed in either case of the cooling member or the inner peripheral surface of the plate cylinder may be referred to as “recessed surface”). In this case, the cooling member may be formed with only holes serving as an inlet and an outlet at a position corresponding to the recess formed in the inner peripheral surface of the plate cylinder, or in addition to the formation of the outlet, Forming a recess having the same shape as the recess formed on the inner peripheral surface of the cylinder at a position matching the recess formed on the inner peripheral surface of the plate cylinder, and forming a flow path together with the recess formed on the inner peripheral surface of the plate cylinder. You can also.
In addition, the recesses can be subdivided grooves as in the specific example shown in the figure, so that a small amount of cooling fluid can flow efficiently over the entire cooling surface, and a large amount of cooling fluid is used. Therefore, it is possible to prevent leakage of the cooling fluid and weight increase of the plate cylinder caused by this. In addition, by using such a narrow groove, the cooling fluid can be easily discharged from the flow path by allowing air to flow when the plate cylinder is removed.
The cross-sectional shape of the narrow groove is not particularly limited, and various shapes such as a square shape, a U shape, a semicircular shape, and a V shape can be employed. The size of the groove cannot be defined unconditionally depending on the size of the cooling member or the type of cooling fluid to be used, but the cross section of the flow path is 10 to 150 mm 2 , it is desirable to have a cross-sectional area in the range of 20 to 100 mm 2.
In addition, the recess formed in the inner peripheral surface of the cooling member and / or the plate cylinder may be the entire surface partitioned by the outer peripheral edge, and in this case, the cooling surface can be made large. Further, in the flow path composed of the subdivided grooves shown in the figure, it was a zigzag flow path having a long groove in the drive axis direction of the plate cylinder, but is not limited to this, and the drive axis direction of the plate cylinder Various changes such as a zigzag shape having a long groove in a direction perpendicular to the horizontal direction (horizontal direction) are possible.
［版胴外筒］
上述した具体例においては、版胴には、２枚の刷版を装着するように、２か所に刷版の固定部が形成され、この刷版の位置に対応するように冷却部材が版胴の直径に平行且つ該直径を挟んで対向し設置されていたが、これに限定されない。版胴は１枚又は２枚以上の刷版を固定し得るものであってもよく、図に示した刷版を２枚装着する版胴の場合と同様に、刷版の位置に対応した位置に冷却部材を設置することができる。また刷版の版胴への固定方法も図に示した態様に限定されず、従来公知のすべての態様を採用し得る。
また版胴内周面には、冷却部材を嵌合させる嵌合部が形成されていたが、嵌合部を形成することなく、後述するように冷却部材の版胴内周面に向く面を版胴内周面と合致する曲面状にしても勿論よい。
[Plate cylinder outer cylinder]
In the above-described specific example, the plate cylinder is provided with two plate fixing portions so that two printing plates are mounted, and the cooling member is provided so as to correspond to the position of the printing plate. Although it was installed parallel to the diameter of the trunk and facing the diameter, the present invention is not limited to this. The plate cylinder may be capable of fixing one plate or two or more plates, and the position corresponding to the position of the plate as in the case of the plate cylinder on which two plates shown in the figure are mounted. A cooling member can be installed. Further, the method of fixing the printing plate to the plate cylinder is not limited to the mode shown in the figure, and any conventionally known mode can be adopted.
In addition, a fitting portion for fitting the cooling member was formed on the inner surface of the plate cylinder, but without forming the fitting portion, a surface facing the inner surface of the plate cylinder of the cooling member was formed as described later. Of course, a curved surface that matches the inner peripheral surface of the plate cylinder may be used.
［冷却部材］
冷却部材は、冷却部材の版胴内周面と当接する面及び／又は版胴内周面に形成された凹部により、冷却用流体の流路が形成される限り、その形状は問わず、具体例に示したように、版胴内周面に冷却部材を嵌合可能な嵌合部が形成されている場合には、嵌合部に合致した形状に形成することもできるし、版胴内周面に沿った曲面状であってもよい。冷却部材の版胴内周面との当接面が版胴の内周曲面に沿った曲面状に形成されていることにより、冷却用流体の流路が版胴表面により近くなり、版胴表面を効率よく冷却することが可能になる。この場合、冷却部材全体が曲面状（円弧状）のプレートであることが冷却部材を軽量化できるので好ましいが、版胴内周面に当接する面のみが曲面で他方の面が平面の半円柱形状であってもよい。
更に冷却部材に形成される冷却用流体の流入口又は流出口の位置や、或いは版胴内部に形成される流入口及び流出口と接続される配管等は、版胴の形状等に応じて適宜設定することができ、例えば図に示した具体例では、孔１２ａ（流入口）及び孔１２ｂ（流出口）は導入管１８ａ及び導出管１８ｂと接続されていたが、孔１２ａ（流入口）から冷却用流体を直接導入し、孔１２ｂ（流出口）から直接排出することもできる。
[Cooling member]
The shape of the cooling member is not limited as long as the cooling fluid flow path is formed by the surface of the cooling member that contacts the inner peripheral surface of the plate cylinder and / or the recess formed in the inner peripheral surface of the plate cylinder. As shown in the example, when the fitting part that can fit the cooling member is formed on the inner peripheral surface of the plate cylinder, it can be formed in a shape that matches the fitting part. It may be a curved surface along the peripheral surface. Since the contact surface of the cooling member with the inner peripheral surface of the plate cylinder is formed in a curved shape along the inner peripheral curved surface of the plate cylinder, the flow path of the cooling fluid becomes closer to the plate cylinder surface, and the plate cylinder surface Can be efficiently cooled. In this case, it is preferable that the entire cooling member is a curved plate (arc-shaped) because the cooling member can be reduced in weight. However, only the surface abutting the inner peripheral surface of the plate cylinder is a curved surface and the other surface is a flat half cylinder. It may be a shape.
Further, the position of the inlet or outlet of the cooling fluid formed on the cooling member, or the pipes connected to the inlet and outlet formed inside the plate cylinder are appropriately determined depending on the shape of the plate cylinder. For example, in the specific example shown in the figure, the hole 12a (inlet) and the hole 12b (outlet) are connected to the introduction pipe 18a and the outlet pipe 18b, but from the hole 12a (inlet). The cooling fluid can be directly introduced and discharged directly from the hole 12b (outlet).
また図に示した冷却部材は、版胴外筒内面に形成された嵌合部の外周に固定可能なようにフランジ部が形成され、該フランジ部の箇所にパッキンを介在させて流路の液密性を確保していたが、版胴内周面に冷却用流体の漏れを生じないように固定できる限り、これに限定されない。例えば、フランジ部を形成することなく、凹部を区画する外周部（外周縁部分）と、版胴内周面又は冷却部材とを密着させるべく、これらの間にパッキン等のシール部材を介在させるほか、凹部形成面全体或いは凹部形成面と当接する部分全体の何れかにシール部材を形成して、冷却部材又は版胴内周面と密着させた状態で固定することもできる。
本発明においては特に、凹部が冷却部材に形成され、この凹部の少なくとも外周部が、シール部材を介して版胴内周面と密着していることが好適である。
Further, the cooling member shown in the figure has a flange portion so that it can be fixed to the outer periphery of the fitting portion formed on the inner surface of the outer cylinder of the plate cylinder, and a gasket is interposed at the flange portion so Although the tightness is ensured, the present invention is not limited to this as long as it can be fixed to the inner peripheral surface of the plate cylinder so as not to leak the cooling fluid. For example, without forming a flange portion, a seal member such as packing is interposed between the outer peripheral portion (outer peripheral portion) partitioning the recess and the inner peripheral surface of the plate cylinder or the cooling member. The sealing member can be formed on either the entire concave portion forming surface or the entire portion in contact with the concave portion forming surface, and can be fixed in close contact with the cooling member or the plate cylinder inner peripheral surface.
In the present invention, it is particularly preferable that the recess is formed in the cooling member, and at least the outer periphery of the recess is in close contact with the inner peripheral surface of the plate cylinder via the seal member.
冷却部材の数及びその大きさは、図に示した具体例では、版胴の固定部を結ぶ直径を挟み且つ該直径と平行に２枚設置されていたが、これに限定されない。版胴に装着される刷版の数に対応して、刷版が装着される部分に対応する版胴外筒周面に冷却部材を設置することによって、前述したように、効率よく刷版に対応する位置の版胴表面を冷却することが可能になる。
本発明の冷却部材においては、冷却用流体としては水を好適に使用することができるが、これに限定されず、従来より、冷却に用いられていた流体であれば液体に限定されず、空気等の気体であってもよい。
また本発明においては、冷却部材に所望の温度に調節された流体を流入することにより、版胴表面を冷却のみならず加温することも可能であり、版胴表面を適切な温度に調節することが可能である。
In the specific example shown in the drawing, the number of cooling members and the size thereof are two in parallel with the diameter connecting the fixed portion of the plate cylinder, but the invention is not limited to this. By installing a cooling member on the outer peripheral surface of the plate cylinder corresponding to the portion where the plate is mounted in accordance with the number of plates mounted on the plate cylinder, as described above, the plate can be efficiently obtained. It becomes possible to cool the plate cylinder surface at the corresponding position.
In the cooling member of the present invention, water can be suitably used as the cooling fluid, but is not limited to this, and any fluid that has been conventionally used for cooling is not limited to liquid, and air. Or a gas such as
In the present invention, it is possible not only to cool the plate cylinder surface but also to heat the plate cylinder surface by flowing a fluid adjusted to a desired temperature into the cooling member. It is possible.
１ 版胴、２ 版胴外筒、３ ハブ、４ 固定部、５ クランプ、６ 軸受け部、７ 嵌合部、１０ 冷却部材、１１ 細溝（凹部）、１２ 孔、１３ ネジ穴、１４ フランジ部、１５ パッキン、１６ ネジ、１７ 流路、１８ 管、２０ 片持回転軸。 1 printing cylinder, 2 printing cylinder outer cylinder, 3 hub, 4 fixing part, 5 clamp, 6 bearing part, 7 fitting part, 10 cooling member, 11 narrow groove (recessed part), 12 holes, 13 screw hole, 14 flange part 15 packing, 16 screws, 17 flow path, 18 pipes, 20 cantilevered rotating shaft.
Claims (6)
前記版胴の内部には、版胴内周面と当接する冷却部材が設置されており、前記版胴内周面及び／又は冷却部材の版胴との当接面には凹部が形成されており、該凹部を除く部分において版胴内周面と冷却部材が密着し、
前記冷却部材には、前記凹部と連通する冷却流体の流入口及び流出口が形成されており、
前記凹部形成部分によって、版胴外周面を冷却するための冷却流体の流路が形成されることを特徴とする印刷用版胴。 In a printing cylinder that can be fitted with a printing plate on its outer peripheral surface,
A cooling member that comes into contact with the inner peripheral surface of the plate cylinder is installed inside the plate cylinder, and a concave portion is formed on the inner peripheral surface of the plate cylinder and / or the contact surface of the cooling member with the plate cylinder. And the plate cylinder inner peripheral surface and the cooling member are in close contact with each other except the concave portion,
The cooling member has an inlet and an outlet for cooling fluid communicating with the recess,
A printing plate cylinder for forming a printing cylinder, characterized in that a flow path of a cooling fluid for cooling the outer peripheral surface of the plate cylinder is formed by the recess forming portion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016231295A JP6922198B2 (en) | 2016-11-29 | 2016-11-29 | Printing plate |
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| JP2016231295A JP6922198B2 (en) | 2016-11-29 | 2016-11-29 | Printing plate |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003511278A (en) * | 1999-10-08 | 2003-03-25 | ケーニツヒ ウント バウエル アクチエンゲゼルシヤフト | Rotary printing press cylinder |
| US20070062405A1 (en) * | 2005-09-10 | 2007-03-22 | Man Roland Druckmaschinen Ag | Press cylinder and method for compensating thermally induced deformation of a press cylinder |
| JP2011245701A (en) * | 2010-05-26 | 2011-12-08 | National Printing Bureau | Gap cover with cooling mechanism |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003511278A (en) * | 1999-10-08 | 2003-03-25 | ケーニツヒ ウント バウエル アクチエンゲゼルシヤフト | Rotary printing press cylinder |
| US20070062405A1 (en) * | 2005-09-10 | 2007-03-22 | Man Roland Druckmaschinen Ag | Press cylinder and method for compensating thermally induced deformation of a press cylinder |
| JP2011245701A (en) * | 2010-05-26 | 2011-12-08 | National Printing Bureau | Gap cover with cooling mechanism |
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