JPH04135336U - Device to prevent printing ink from adhering to guide rollers - Google Patents

Abstract

(57) [Summary] [Purpose] In a rotary printing press, half-dry printing ink adheres to the guide roller that guides the printed running paper to the folding machine, and this stains the surface of the running paper. prevent. [Structure] Drive means for forcibly rotating a guide roller that guides the printed running paper to the folding machine at a circumferential speed that is several percent faster or slower than the feeding speed of the running paper. Connect to.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea plays a role in guiding the printed running paper to the folding machine in a rotary printing press. Half-dry printing ink adheres to the guide roller that holds the paper, and this Relating to a device to prevent soiling.

0002

[Conventional technology]

In the case of newspaper rotary printing presses, multiple rotary printing presses and multiple folding machines are connected. ing. In this case, since there are multiple combinations of printing machines and folding machines, A large number of guide rollers are required to guide the paper, and in some cases, close to 100 guide rollers are installed. It is being These guide rollers rotate due to the friction of the contact surface with the running paper during printing. Bearing the bearing against the fixed end so as not to cause any resistance to the running paper. It is rotatably supported by a ring.

0003 Now, when the printing ink on the printed running paper passes through the guide rollers, it Because the paper dries only slightly, the printing ink and paper dust from the running paper adhere to the guide roller. child If these printing inks and paper dust adhere to the guide rollers, they may stain the paper surface or cause damage to the running paper. This may cause wrinkles to appear, which may reduce print quality. Therefore, the operator , to remove the ink adhering to the many guide rollers. This work is dirty. This work is dangerous because it involves a lot of stress and work at heights. death However, it is necessary to secure multiple workers for this work, and labor costs are also high. There is a problem that it takes.

0004 In order to solve the above problems, an automatic guide roller cleaning device has been developed in recent years. Ru. For example, after printing is completed, the running paper is Run the paper at low speed and apply the solvent to the running paper intermittently using the solvent applicator. When the running paper passes through the guide roller, the With the guide roller rotation drive device, the speed of the running paper and the circumferential speed of the guide roller are different. The guide roller is rotated so that

[0005] As a result, the running paper scrapes off the printing ink adhering to the guide roller and prints ink. The ink sticks to the running paper and the printing ink is removed from the guide roller. Nao Guy Some drawer drive devices simply apply a brake to the guide roller. .

[0006]

[Problem that the idea aims to solve]

In the conventional technology, a guide roller drive device is attached to each guide roller, and the drive Since an electric motor or an air motor is used as the drive source to move the Even if you include the driver, it will be expensive. Moreover, the guide rollers must be washed after printing is finished. A worker will be required to operate the cleaning equipment. and running to remove printing ink There are disadvantages such as consumption of paper and high cost.

[0007]

[Means to solve the problem]

This idea is based on a fundamentally different technical idea from conventional technology. that The conventional technology has already removed the printing ink that has adhered to the guide roller. In contrast, this invention prevents printing ink from adhering to the guide roller. The reason is that it has been devised in a way that makes it easy to use. Rotary printing machines are equipped with special equipment to prevent paper from sagging while running. , Dorazu Glora always gives tension to the running paper. and that doratu It is well known that ink does not adhere to the roller surface of a growler. de The reason why printing ink does not stick to the Rats Growler is because the Dratsu Groler is not attached to the rotary printing machine. It receives a drive and rotates at a circumferential speed several percent faster than the speed of the running paper. As a result, a slip phenomenon occurs at the contact surface between the running paper and the drag roller, and the drag It is considered that ink does not adhere to the roller.

[0008] Focusing on the above points, this invention works to guide the printed running paper to the folding machine. The guide roller is set at several percentage points relative to the feeding speed of the traveling paper. A guide connected to a driving means that forcibly rotates the shaft at a faster or slower circumferential speed. This invention proposes a device for preventing printing ink from adhering to a drawer.

[0009]

[Effect]

In the device of this invention having the above structure, the guide roller is The circumferential speed of the roller is forcibly rotated several percent faster or slower than the speed of the running paper. This prevents the printing ink from adhering to the surface of the guide roller, making the printing easier. This eliminates the need for cleaning the guide rollers after printing.

0010

【Example】

In FIGS. 1 and 2, a running paper 1 is placed between a guide roller 2 and a drag roller 3. It is guided and runs in the direction of arrow A. Guide roller 2 is fitted at both ends. It is rotatably held on a shaft 6 fixed to a frame 5 via a bearing 4. The drag roller 3 rotates several percent faster than the running speed of the running paper 1. , are integrated into a single shaft with thin shafts 7 at both ends, and the thin shaft 7 is rotatably supported by the frame 5. There is. A pulley 8 is attached to the shaft end of the thin shaft 7 that protrudes outside the frame 5. It is being The belt 9 hanging on the pulley 8 is driven by the printing machine. Therefore, the drug growler 3 is forcibly rotated.

[0011] The above is the running paper 1 and the guide roller without the printing ink stain prevention device installed. This is an explanation of the -ra 2 and the drug growler 3. Now, in one embodiment of this invention, The rotation of the drag roller 3 is used as a driving source to forcibly rotate the idle roller 2. This is what we propose to do. Please note that the drive source is not limited to Dratsu Growler 3. It can be any rotationally driven part of the printing press, or another drive such as a motor. A power source may be provided. Regardless of the drive source, the circumferential speed of guide roller 2 is All you have to do is rotate the guide roller 2 a few percent faster or slower than the speed of the paper 1. stomach.

0012 A driving gear 10 is attached to the outer periphery of the guide roller 2. This driving gear 1 0 has two guide rollers so that the guide roller 2 can be attached without removing it from the fixed shaft 6. It is a split gear and is fixed to the guide roller 2 with a screw 12. Pini with bracket 13 A shaft 16 with an on gear 14 and a driven pulley 15 attached to both ends is attached to a bracket. It is fitted into a bearing 17 attached to the shaft 13 and supported so as to be rotatable.

[0013] It meshes with the gear 14. Note that the bracket 13 connects the shaft 6 to the frame. It is split into two parts so that it can be attached without removing it from the frame 5. It is fixed to the shaft 6. On the other hand, it is attached to the thin shaft 7 that is integrated with the drug growler 3. There are two gears 20 so that the thin shaft 7 can be attached without removing it from the frame 5. It is a split gear and is fixed to the thin shaft 7 with a screw 21. Gears meshing with gear 20 22 is rotatably supported on a bracket 23 attached to the frame 5. shaft A pulley 25 is attached to the end of 24. The belt 26 is attached to the driven pulley. 15 and this pulley 25. The idle pulleys 27, 27 are Apply tension to the belt 26.

[0014] The above mechanism transmits the rotation of the drag roller 3 to the guide roller 2. , the peripheral speed of the drag roller 3 is already several percent faster than the running speed of the running paper 1. In consideration of this, the diameter of each pulley 15, 25 and each gear 10:14, 20:22 are determined. The ratio is set so that the circumferential speed of the guide roller 2 is several percent faster or slower than the running speed of the running paper 1. You just have to decide to do it.

[0015] Next, in FIG. 3, a clutch 28 is installed between the shaft 16 and the gear 14, It is possible to transmit the rotational drive of the shaft 16 to the gear 14 or not. This example Now, do not apply rotational drive to all guide rollers 2, and remove them from the guide rollers 2, which are particularly prone to dirt. It is possible to apply rotational drive only to the hydraulic roller 2, or apply rotational drive only at certain times, During the next period, the rotation drive is applied to another guide roller 2. Do not put too much load on the running paper 1, as there is a risk of the running paper 1 breaking. can be reduced.

[0016]

[Effect of the idea] By adopting the above-mentioned structure of this invention, guide rollers at high places after printing work are completed. This eliminates the need to clean the guide rollers, and also eliminates the need for cleaning the guide rollers, and removes printed paper from the guide rollers. There are many advantages in terms of economy and safety since there is no chance of contamination.

[Brief explanation of drawings]

FIG. 1 is a perspective view of essential parts of an embodiment of the device of this invention.

2 is a perspective view of substantially the entire device including the parts shown in FIG. 1; FIG.

FIG. 3 is a perspective view of the main parts of several embodiments of the device of this invention.

[Explanation of symbols]

1 Running paper 2 Guide roller 3 Dratsugrora 10 Drive gear (split gear) 14 Gears 15 Driven pulley (pulley) 20 Gear (split gear) 22 Gear 25 Pulley 26 Belt 28 Clutch

Claims (3)

[Scope of utility model registration request] Claim 1: In a rotary printing press, a guide roller that guides the printed running paper to a folding machine is configured to move the guide roller several percent faster than the feeding speed of the running paper. A device for preventing printing ink from adhering to a guide roller, which is connected to a drive means for forcibly rotating at a slow circumferential speed. 2. The driving means includes two split gears fitted respectively to the shaft of the guide roller and the shaft of a drag roller that feeds the running paper, and a gear coaxial with the gears meshing with these gears. 2. A device for preventing printing ink from adhering to a guide roller according to claim 1, which is formed by a belt transmission mechanism constituted by a belt transmission mechanism. 3. The guide roller according to claim 2, wherein a clutch is interposed between a gear meshing with a split gear fitted on the shaft of the guide roller and the belt transmission device. Printing ink adhesion prevention device.