JPH04100850U - Paper transport cylinder of sheet-fed printing press - Google Patents

Abstract

(57) [Summary] [Purpose] To remove roughness, scratches, etc. that occurred on the back of printing paper.
Prevent problems such as edge folds and printing problems such as doubles. [Structure] When the printing paper 9 is accelerated by the swing gripper 4 and transferred to the transport cylinder 5, the air interposed between the printing paper 9 and the transport cylinder 5 is installed parallel to the circumferential direction of the surface of the transport cylinder 5. and escapes to the outside through the plurality of grooves 5a,
The printing paper 9 is conveyed in close contact with the surface of the conveyance cylinder 5.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a paper conveyance cylinder for a sheet-fed printing press.

0002

[Conventional technology]

To explain a conventional sheet-fed printing press using Figures 3 and 4, 1 in Figure 3 is a paper feeder, and 2 is a paper feeder. Eda board, 3 is the forehand device, 4 is the swing gripper device, 5 in Figures 3 and 4 is the conveyor 6 is the impression cylinder, 7 is the blanket cylinder, 8 is the plate cylinder, 9 is the printing paper, 10 is the inking device, and the paper feed The printing paper 9 is continuously fed one by one to the feeder board 2 by the device 1. It is sent on the data board 2 to the pre-control device 3, and its position is regulated. child The printed paper 9 positioned at →It is conveyed to the impression cylinder 6 while being repositioned one after another, and printing is performed during that time.

0003

[Problem that the idea aims to solve]

The conventional sheet-fed printing press shown in FIGS. 3 and 4 has the following problems. That is, printing paper 9 is accelerated by the swing gripper 4 and transferred to the transport cylinder 5, the printing Since air is interposed between the paper 9 and the outer circumferential surface of the transport cylinder 5, the printing paper 9 is placed on the surface of the transport cylinder 5. Difficult to follow the surface. As a result, problems such as rough edges, scratches, and folded edges of the printing paper 9 occur. live. In addition, the violent movement of the printing paper 9 must be stopped by the time the impression cylinder 6 and blanket cylinder 7 print. However, printing problems such as double printing were occurring.

0004 This invention is proposed in view of the above problems, and its purpose is to Remove defects such as roughness, scratches, and folded edges that occur on the back of the paper, as well as printing defects such as doubling. The object of the present invention is to provide a paper conveyance cylinder for a sheet-fed printing press that can prevent the above problems.

[0005]

[Means to solve the problem]

In order to achieve the above purpose, the paper conveyance cylinder of the sheet-fed printing press of the present invention is designed to Multiple grooves are provided in the circumferential direction on the surface of the transport cylinder to remove air interposed between the transport cylinder and the transport cylinder. They are installed in parallel.

[0006]

[Effect]

The paper transport cylinder of the sheet-fed printing press of the present invention is constructed as described above, and the printing paper is When the printing paper is accelerated by the in-grip and delivered to the transport cylinder, the printing paper and the transport cylinder The air interposed between the The printing paper is conveyed while being brought into close contact with the surface of the conveyance cylinder.

[0007]

【Example】

Next, the paper conveyance cylinder of the sheet-fed printing press of the present invention will be explained with reference to Figures 1 and 2. gripper, 5 is a transport cylinder, 5a is a plurality of grooves, and each groove 5a is a surface of the transport cylinder 5. They are installed parallel to the circumferential direction. Further, 6 is an impression cylinder, and 9 is a printing paper. Next, the operation of the paper conveyance cylinder of the sheet-fed printing press shown in FIGS. 1 and 2 will be explained in detail. When the printing paper 9 is accelerated by the swing gripper 4 and transferred to the transport cylinder 5 , the air interposed between the printing paper 9 and the transport cylinder 5 is parallel to the circumferential direction of the surface of the transport cylinder 5. The printing paper 9 escapes to the outside through the plurality of grooves 5a installed on the surface of the conveyor cylinder 5. Transport in close contact.

[0008]

[Effect of the idea]

In the sheet-fed printing press of this invention, the paper conveyance cylinder is such that the printing paper is attached to the swing grippers as described above. When the printing paper is accelerated and transferred to the transport cylinder, it is interposed between the printing paper and the transport cylinder. Air escapes to the outside through multiple grooves installed parallel to the circumferential direction on the surface of the conveyor cylinder. Since the printing paper is brought into close contact with the surface of the conveyance cylinder, there is no problem with the tail of the conveyed printing paper It is possible to prevent problems such as roughness, scratches, bent edges, etc., and printing problems such as double printing.

[Brief explanation of drawings]

FIG. 1 is a front view showing an embodiment of a paper conveyance cylinder of a sheet-fed printing press according to the present invention.

FIG. 2 is a side view thereof.

FIG. 3 is a side view showing a conventional sheet-fed printing press.

FIG. 4 is a front view showing a paper conveyance cylinder of the same sheet-fed printing press.

[Explanation of symbols]

5 Paper transport cylinder 5a Groove 9 Printing paper

Claims (1)

[Scope of utility model registration request] 1. A paper transport cylinder for a sheet-fed printing press, characterized in that a plurality of grooves are installed in parallel in the circumferential direction on the surface of the transport cylinder for removing air present between the printing paper and the transport cylinder. .