JPS6296251A - Paper passing method - Google Patents

Abstract

PURPOSE:To automate paper passing operation as well as to reduce a danger and a burden on an operator, by installing a paper passing plate in a lower cylinder, rounding this cylinder's circumference, and delibering the fine width paper scooped up at a tip part of the paper passing plate into an inlet pocket part at the next stage in consecutive order. CONSTITUTION:Each paper passing plate 10 is installing on lower cylinders 35, 37 and 39 in touching its tip part with them, and on the basis of transit time of the fine width paper fed out of a pre-process, air is jetted to these paper passing plates 10. And, circumferentially rounding on an outer surface of the cylinder 35, the fine width paper scooped up with the tip part of the paper passing plate 10 is delivered to an inlet pocket part of the cylinder 37 at the next stage in order with the air jetted for the specified time long. At a control part 19, on the basis of a reference point passing signal of edge paper, each of control valves 18 is controlled according to the speed per second inputted from an input part 22 with data of the prestored speed per second, paper pass length, etc. Therefore, paper passing operation can be almost automatically, a dange and a burden on an operator are sharply reducible.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a paper passing method that can automatically pass paper through a dryer part in a short time without exposing workers to dangerous conditions.

(Prior Art) In paper machines used in paper mills, pulp suspension water discharged from the slicing section of a flow box passes through a wire section, a press section, and a dryer section, and is finished as dried roots. As shown in FIG. 3, the dryer part (1) has cylinders (2) arranged in two rows, upper and lower, and is generally divided into a plurality of groups (3 and 4). Endless canvases (6) are provided in the upper and lower cylinder rows of each group to press the paper web against the cylinder surface via a small diameter canvas roll (5).

The paper passing operation in the cylinder device is generally carried out by sandwiching a thin piece of paper (commonly referred to as ``mimigami'') with a width of approximately io o un between a pair of carrier ropes (7), and feeding the paper one by one along a swivel bus. The carrier rope is a carrier sieve provided at the front of the paper roll (8) as shown in Fig. 3, a groove (9) provided at the front of the dryer cylinder surface as shown in Fig. 4, or a suitable one. They are arranged in an endless manner following the path through the carrier sieve.

However, when paper is passed through a carrier lobe, the paper does not have sufficient strength and may break due to slight snags or fluctuations in tension during paper passing. Furthermore, when paper passes through the final group of dryers, the selvedge paper is quite dry and often comes off from the carrier lobe.

If the selvage paper breaks or comes off, the worker must immediately remove the pieces of selvage paper scattered on the cylinder or canvas and rethread the paper from the beginning.

Such work is extremely dangerous, and the amount of paper loss incurred during the time it takes to thread the paper is enormous.

(Problems to be Solved by the Invention) In view of the current situation, the inventors of the present invention have conducted intensive research to solve the problems associated with the conventional paper threading method as described above, and as a result, they have discovered that the method involves dangerous work. The present inventors have discovered a method for passing paper through the dryer part in a short time without any problems, and have achieved the present invention.

(Means for Solving the Problem) The present invention provides a paper passing method using carrier lobes of dryer cylinders arranged in upper and lower stages, each having an endless canvas. A paper passing plate is provided in contact with the paper passing plate, and air is blown onto the paper passing plate in advance based on the passing time of the thin paper sent from the previous process by the carrier lobe, and the paper goes around the outer surface of the cylinder.
This paper passing method is characterized in that the paper towels scooped up at the tip of the paper passing plate are sequentially fed into the cylinder inlet socket of the next stage by air jetted out for a predetermined period of time.

(Function) In order to more specifically explain the paper passing method of the present invention, it will be explained in more detail based on the drawings.

FIG. 1 shows a part of the dryer part shown in FIG. 3 in detail. The paper passing plate (10), which plays an important role in carrying out the method of the present invention, is formed of a rectangular plate of an appropriate size, as shown in FIG. 2, for example. In the figure, since the selvage paper (11) passes in the direction of the arrow, it is desirable that the surface through which the selvage paper passes is inward, and that it has a curved shape with the axis perpendicular to the direction of the selvage paper. In order to send the edged paper in the direction of the arrow along the paper passing plate, nozzle parts (12) are provided below the paper passing plate and are protruded at appropriate intervals so as to blow pressurized air upward. ing. A narrow slit portion (13) is provided above each nozzle portion, and although this slit portion is extremely effective for stably passing paper, it is not necessarily an essential configuration.

In Fig. 1, Gion (14) passes between each cylinder as shown by the dashed line, so 11h35, 37th floor and 3rd floor
A doctor device (15) is provided at the top of the cylinder 9. A paper passing plate is fixed to the doctor bag of such an apparatus with its rear end facing toward the entrance side pocket (16) formed by the outer surface of the upper cylinder and the canvas.

Pressurized air piping (17) connected to the nozzle part of the paper passing plate
) is provided with an ON-OFF type control valve (18) for each pipe, and the control valve is operated by a signal sent from the control section (19). For example, when paper is passed sequentially starting from the 35th cylinder, when the tip of the edge paper goes around the outer surface of the 35th cylinder and reaches point A, the control valve opens and air is injected from the nozzle of the paper passing plate. Then, the tip of the selvage paper scooped up by the doctor blade is fed into the entrance side pocket of the affected cylinder. When the paper is sent into the entrance side pocket, the control valve closes and 11h35
Air injection to the paper passing plate is stopped.

The paper that entered the entrance pocket goes around the outer surface of the floor 36 cylinder, exits from the exit pocket (20), and almost follows the paper path shown by the dashed line! It goes into the entrance side pocket of the 1h37 cylinder.

By repeating this operation, the paper sheets are passed one after another, but since the dimensions and spacing of the upper and lower cylinder rows are determined depending on the equipment, the length of the gimbus can be calculated uniquely. Therefore, when applying the paper passing method of the present invention, it is necessary to set a reference point at an appropriate location in the previous process, detect the passing of the paper by the detection sensor (21), and calculate the length of the paper. Bye.

Based on the reference point passing signal of the selvedge paper, the control unit controls each control valve according to the paper machine speed input from the input unit (22) using pre-stored data regarding the paper machine speed, the length of the girder pass, etc. It can be performed.

In the above description, the paper passing plate is fixed to the doctor bank of the existing doctor device, but the present invention is not limited to this example. For example, the tip of the paper passing plate may be processed to perform a doctoring action. Of course, it can be modified as appropriate.

(Effects) According to the paper passing method according to the present invention, paper can be passed through the dryer part almost automatically, so that the worker can pass the paper without being exposed to dangerous conditions, which reduces the burden on the worker. It is greatly reduced. Moreover, since the paper passing is completed in a short time, paper loss during the paper making process is minimized.

In particular, the paper passing method of the present invention is particularly effective when applied to a group of dryers downstream of the dryer part where the selvage paper is considerably dry.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram when the paper passing method according to the present invention is applied to a 5-group dryer of a paper machine. FIG. 2 is a diagram showing details of the paper passing board. 3 and 4 show the structure of a conventional dryer part. (1): Dryer part (2): Dryer cylinder (3): 4th group dryer (4): 5th group dryer (5): Canvas roll (6): Canvas (7): Carrier rope (8): Paper roll ( 9): Groove section (10): Paper passing plate (11): Slip paper (12): Nozzle section
(13) Nislit part (14): Gion
(15): Doctor device (16): Inlet side pocket (17): Pressurized air piping (18): Control valve (
19): Control section (20): Outlet side pocket section (
21): Detection sensor (22): Input section Patent applicant: Kanzaki Paper Co., Ltd., No. 11, I Engineering, Fig. 2

Claims (1)

[Claims] In a paper passing method using a carrier rope for dryer cylinders arranged in two tiers (upper and lower), each with an endless canvas, a paper passing plate is provided on the lower cylinder with its tip touching, and the carrier rope is used to transfer paper from the previous process. Based on the passing time of the paper passing plate, air is ejected in advance to the paper passing plate, and the air is ejected for a predetermined period of time to circulate around the outer surface of the cylinder and scoop up the thin paper towel at the tip of the paper passing plate. A feeding method characterized in that the paper is sequentially fed into the cylinder entrance pocket of the next stage.