JPH05147786A - Frame replacing method - Google Patents

Abstract

PURPOSE:To make frame replacement quickly and smoothly by cutting a sheet along parallel lines using two cutting devices, forming a glue margin between the parallel lines using a gluing device, affixing the glue margin to the surface of a new spool, and severing the foremost of the glue margin with another cutting device. CONSTITUTION:From upstream in the direction in which a sheet is fed, two cutting devices 3, gluing device 4, and another cutting device 5 are furnished over the sheet 2 in a position soon before being introduced to a reel drum 1. The cutting devices 3 and gluing device 4 are mounted on a moving means 6 fixed to a frame 7. The sheet 2 is cut along parallel lines by the cutting devices 3, and between the lines a glue margin 10 is formed by the gluing device 4. This glue margin 10 is affixed to the surface of a new spool 11, and the foremost of the glue margin 10 is severed by the cutting device 5. The cutting devices 3 are moved to the two sides of the sheet 2 by the moving means 6, and the sheet 2 is cut into a triangle and wound on the new spool 11 as initial turn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for changing the winding frame in a winding machine, and more particularly, it takes up a lot of time for winding a new spool at the time of changing the frame, and winding a good product without any defect. The present invention relates to a frame changing method for stably obtaining.

[0002]

2. Description of the Related Art Winders of various types are used in paper mills. For example, a paper machine for producing base paper, a coater device for producing a coated paper by applying a pigment coating liquid, Alternatively, in a reel part such as an on-machine coating type paper machine, in which paper is made, and then a pigment coating liquid is applied to produce coated paper, the horizontal rail type take-up is used to wind the coated paper. The machine is mainly used.

When the frame is changed using this horizontal rail type winder (hereinafter, simply referred to as a winder), for example, a new spool on a primary arm held at a standby position on a drum is replaced with a primary spool. While rotating the arm slightly, the pressure contact device is operated to press the drum, and the sheets that are continuously fed are cut by blowing an air jet from a paper cutting knife and a nozzle. Is wrapped around. Then, after winding the desired amount wound on the old spool from the drum on the horizontal rail with the secondary arm, the new spool is lowered onto the horizontal rail with the primary arm,
The frame is being changed by pressing it against the drum with the secondary arm.

However, in the conventional frame changing method, a method is adopted in which sheets that are continuously fed are cut by blowing an air jet from a paper cutting knife and a nozzle and wound around a new spool. Therefore, the shape of the leading edge of the sheet does not become constant for each frame change, and the sheet cannot be cut well by changing the frame with strong paper strength.Therefore, when winding the new spool, the winding of the new spool is smooth. There is a problem that it is not done.

Further, depending on the sheet, even if it is folded and wound, the sheet may be broken immediately, resulting in a time-consuming frame replacement, and moreover, the sheet is likely to be broken at the leading end of the sheet at the beginning of winding. was there. It takes a lot of time to change the sheet frame. For example, in the case of a paper machine, all the sheets continuously fed from the previous process are removed during this period, so that the production efficiency of the product is considerably reduced. At the same time, there is a problem that the operator is burdened with a great deal of processing of a large number of defective sheets.

Further, the breakage of the sheet occurring at the leading end of the sheet at the beginning of winding causes defects such as blisters and wrinkles in the lower layer portion (lower winding portion) of the winding. Further, this sheet breakage easily occurs near the center of the spool.
Then, the sheets are wound one after another in a state of being stacked on the folded sheets to form a layer, so that the compressive force in the inward direction becomes strong and the layers are easily crushed at that portion. Further, due to the action of the compressive force, the mirror surface of winding (so-called end surface) is likely to have a chrysanthemum shape (also referred to as a flower bloom, Star, or star shape).
Therefore, there is a problem that only a winding having many defective portions that cannot be used as a product can be obtained.

[0007]

SUMMARY OF THE INVENTION The present invention provides a frame changing method which does not require much time for winding a new spool at the time of frame changing, and can stably wind good products without any of the above defects. To do.

[0008]

SUMMARY OF THE INVENTION According to the present invention, a new spool on an arm held at a standby position is brought into contact with a drum,
In the method of cutting the continuously sent sheets and winding them around a new spool to change the frame, the two spools waiting in the center of the sheet after the new spool is pressed against the drum Cutting device cuts the sheet in parallel lines,
A glue part is formed between these parallel lines with a gluing device, it is attached to the surface of the new spool, and the tip of the glue forming part is cut with a cutting device provided separately to transfer the sheet to the new spool. The frame changing method is characterized in that the cutting device is moved toward both end portions of the sheet to cut the sheet into a triangular shape, and the sheet is wound around a new spool.

[0009]

The frame changing method of the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a cutting device (3) and a gluing device (4) for cutting a sheet in parallel lines from the upstream side in the traveling direction of the sheet above the sheet (2) immediately before entering the reel drum (1). Next, the moving device (6) is provided with the cutting device (3) and the gluing device so as to form a cutting device (5) for cutting the tip portion of the glue forming portion, and the moving device further includes the moving device. It is a figure which shows an Example at the time of being fixed to the part (7).

The cutting device (3) is composed of a rotary round blade (8) for cutting a sheet and a motor (9) for rotating the round blade, as shown in detail in FIG. Two such cutting devices (3) are installed in the central part of the sheet, in the immediate vicinity of the upstream side of the sizing device. First, as shown in FIG. 2, the sheet is cut into parallel lines, and between these parallel lines. After forming the glue forming part (10) with the gluing device and pasting it on the surface of the new spool (11), cut the tip of the glue forming part with the cutting device (5) provided separately to make it convex. Form one side and transfer the sheet to the new spool,
Using a rodless cylinder as a moving means, one unit is moved from the center toward the operating side (right side in Fig. 1), and the other is moving toward the drive side (left side in Fig. 1). Moved at high speed.

The cutting device (5) for cutting the tip portion of the glue forming portion uses a nozzle portion (12) having a hole portion for ejecting an air jet at the tip portion as shown in FIG. The object of the present invention is achieved by ejecting a jet, but other cutting devices that can be used include a method of ejecting a jet of high-pressure water. The rodless cylinder, which is the above-mentioned moving means, serves the purpose of moving the cutting device toward both end portions at high speed. However, the present invention is not limited to this embodiment, and any other means capable of moving the cutting device at high speed, such as a method of moving the cutting device using a guide rail and a chain or wire, can be appropriately adopted. ..

The effect of the present invention can also be obtained by fixing two round blades and cutting the sheet into parallel lines with the two round blades or by cutting the sheet into a triangular shape. However, if the angle between the parallel cutting line and the cutting device is set, the sheet may be broken at the moment the cutting edge of the cutting device is inserted, and the sheet is cut into a triangular shape. Therefore, if the cutting device is moved from the center of the sheet to the edge of the sheet and the sheet is cut, the body at the rear part after the bite of the round blade pushes the sheet, resulting in a jagged shape of the sheet cutting line. In some cases, the sheet may break from that portion as a starting point.

Therefore, as shown in FIG. 3, an angle switching device (13) is provided, and when cutting the sheet in parallel lines, the cutting edge is put substantially parallel to the flow direction of the sheet, and the sheet is cut into a triangular shape. When doing so, it is desirable to switch to an angle formed by the sheet flow speed and the moving speed of the cutting device. As a specific example of the angle switching device, for example, a round blade is fixed to a shaft portion of a drive motor, the drive motor is held by a holder portion (14), and the holder portion is mounted on a bearing (15) so as to be rotatable. When supporting and fixing the holder part to the rod part of the small air cylinder (16), when the blade edge is inserted almost parallel to the sheet flow direction, the air cylinder is not operated, but when cutting the sheet into a triangular shape The operation is performed by swinging the holder to switch the angle of the round blade. The angle switching device is not limited to the above-mentioned configuration, and any device having a structure for switching the angle of the blade edge of the round blade can be appropriately adopted.

The angle is calculated by the following equation.

[0015]

[Equation 1]

For example, the speed of the sheet is 1000 m / min,
When the moving speed of the cutting device is 200m / min, α is 2
It will be 2.6 °, and the angle of one blade will be 11.3 °.

Further, as shown in FIG. 3, for example, a stopper (17) may be provided to adjust the cutting angle, and the angle of the round blade may be adjusted to an arbitrary angle. As the round blade used in the cutting device, one having an appropriate cross-sectional shape is used, and the object of the present invention can be achieved even if it is fixed to the holder portion at any angle. However, when using a double-edged round blade, the body of the round blade contacts the sheet during movement,
As a result, it is a major cause of breaking the sheet. Therefore, as shown in FIG. 4, it is preferable to use a blade with a single-edged blade having an edge angle of about 5 to 30 °, and cut the surface that is not the inclined surface of the edge. When the round blade of the cutting device is fixed so as to face the side end portion side in the moving direction of the device, it is a method of always making it easy to cut the sheet when cutting the sheet into a triangular shape.

When a round blade with a single blade having a blade edge angle of 5 ° or less is used, the thickness of the blade becomes too thin.
The rigidity of the blade is insufficient to prevent normal cutting of the sheet. On the other hand, when a round blade with a single edge with an edge angle of 30 ° or more is used, the sheet is pressed by the blade edge rather than being cut. The action becomes strong and the sheet is broken.

Further, if the cutting speed of the cutting device is described in detail, the cutting speed of the sheet largely depends on the cutting speed. For example, when cutting a sheet on a desk, it is easy to fix the sheet and move the knife to cut the sheet, but it is difficult to fix the knife and move the sheet to cut. .. Therefore, it is necessary to positively move the knife.

When the moving speed of the sheet is 1000 m / min and the round blade is rotated in the forward direction with respect to the traveling direction of the sheet, the speed difference is 0 when the peripheral speed of the round blade is 1000 m / min. Next, it becomes difficult to cut the sheet. On the other hand, when the rotation of the round blade is rotated in the reverse direction with respect to the running direction of the sheet, the speed ratio increases, but when the peripheral speed of the round blade is slow, the partial load on the blade becomes excessive, while the seat speed When the peripheral speed of the blade is faster than the above, the knife is fixed and the sheet is moving, and the cutting is not performed properly.

Therefore, it is desirable that the rotation speed of the round blade is as high as possible with respect to the sheet, and it is desirable that the rotation speed is equal to or higher than the traveling speed of the sheet without distinction between forward and reverse rotation. The protruding amount of the blade with respect to the sheet, that is, the biting allowance is 1
It is desirable that it is mm or more. When the protrusion amount of the blade with respect to the sheet is 1 mm or less, the blade edge of the round blade is cut when the sheet has a weak tension in the flow direction or when vibration occurs in the sheet during cutting of the sheet. This causes a problem that the sheet is lifted from the surface of the sheet, and as a result, an uncut portion is generated in the cutting line of the sheet.

[0022]

According to the frame changing method of the present invention, since a triangular sheet having a convex portion at its tip is always obtained, the sheet can be wound around the spool very smoothly. Therefore, the winding of the sheet on the spool can be done in the minimum time, so that a large number of defective sheets are not generated,
Excellent production efficiency can be achieved, and the burden on the workers is greatly reduced. Moreover, since it is possible to effectively prevent the occurrence of sheet breakage, it is possible to stably obtain a good product with very few defective portions,
It is especially effective when used for a sheet having strong paper strength.

[Brief description of drawings]

FIG. 1 shows an example in which a cutting device and a gluing device are provided on a moving means, the moving means is fixed to a frame portion, and a cutting device for cutting a glue forming portion is provided on a downstream side. It is a figure which shows an Example.

FIG. 2 is a plan view illustrating a process of forming a triangular piece in which a tip end portion of a sheet is a convex piece portion when a frame is changed.

FIG. 3 is a perspective view of an angle switching device of the cutting device.

FIG. 4 is a diagram showing a shape of a cutting edge of a round blade.

[Explanation of symbols]

 (1) Reel drum (2) Sheet (3) Cutting device for cutting the sheet in parallel lines (4) Gluing device (5) Cutting device for cutting the tip of the glue forming part (6) Moving means (7) ) Flame part (8) Rotating round blade (9) Motor (10) Glue forming part (11) New spool (12) Nozzle part (13) Angle switching device (14) Holder part (15) Bearing (16) Air cylinder (17) Stopper

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Mitsuo Yamamoto 5007 Itozaki-cho, Mihara-shi, Hiroshima Mitsubishi Heavy Industries Ltd. Mihara Works

Claims (5)

[Claims] 1. A method for replacing a frame by pressing a new spool on an arm held at a standby position to a drum, cutting continuously fed sheets, and winding the sheets around the new spool. After the new spool is pressed against the drum, the two cutting devices waiting in the center of the sheet
Cut the sheet into parallel lines, form a glue part between these parallel lines with a gluing device, stick it to the surface of the new spool, and cut it with a cutting device provided separately for the tip of the glue forming part Then, the sheet is transferred to a new spool, the cutting device is moved toward both ends of the sheet to cut the sheet into a triangular shape, and the sheet is wound around the new spool. 2. An angle switching device is provided to the two cutting devices, and when the sheets are cut in parallel lines by the two cutting devices, the cutting devices are inserted substantially parallel to the sheet flow direction. The frame changing method according to claim 1, wherein when cutting the sheet into a triangular shape, the angle of the cutting device is switched so that the cutting line and the cutting device are substantially parallel to each other. 3. A round blade with a single blade having a blade angle of about 5 ° to 30 ° is used as the cutting device, and the surface of the blade tip that is not an inclined surface faces the side end side in the direction in which the cutting device moves. The frame changing method according to claim 1 or 2, characterized in that a cutting device is provided. 4. The frame changing method according to claim 1, wherein the rotation speed of the cutting device is a speed equal to or higher than the traveling speed of the sheet. 5. The frame changing method according to claim 1, wherein the protruding amount of the cutting edge of the cutting device with respect to the sheet is 1 mm or more.