JP2904979B2 - Frame change method - Google Patents

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 a winding frame in a winding machine, and more particularly to a method for winding a non-defective product without taking much time for winding a new spool when changing the frame. In a stable manner.

[0002]

2. Description of the Related Art In a paper mill, various types of winding machines are used. For example, a paper machine for producing a base paper, a coater apparatus for applying a pigment coating liquid to produce a coated paper, Or, in the reel part of an on-machine coating type paper machine that manufactures coated paper by making paper and then applying a pigment coating liquid to the coated paper, a horizontal rail-type winding machine is used to wind the coated paper. Machine is mainly used.

When a 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. A new spool is created by pressing the drum by operating the pressure contact device while slightly rotating the arm, and then cutting the continuously fed sheet, usually by ejecting an air jet from a paper cutting knife and nozzle. Wrapped around. Then, after rewinding the desired amount of winding on the old spool from the drum on the horizontal rail with the secondary arm, lowering the new spool on the horizontal rail with the primary arm,
The frame is changed by pressing the drum with the secondary arm.

However, the conventional frame changing method employs a method of cutting a continuously fed sheet by jetting an air jet from a paper cutting knife and a nozzle and winding the sheet around a new spool. As a result, the shape of the leading edge of the sheet is not constant every time the frame is changed, and the sheet cannot be cut well when changing the frame of a sheet with strong paper strength. There is a problem that is not performed.

[0005] Further, depending on the sheet, even if the sheet is wound at an angle, the sheet is immediately cut out. As a result, it takes time to change the frame, and the sheet is easily broken at the leading end of the sheet at the start of winding. was there. The fact that it takes a lot of time to change the sheet frame means that, for example, in the case of a paper machine, all sheets continuously sent from the previous process are removed during this time, so that the production efficiency of the product is considerably reduced. At the same time, there is a problem in that a large burden is imposed on a worker for processing a large number of defective sheets.

Further, the folding of the sheet at the leading end of the sheet at the beginning of winding causes defects such as blistering and wrinkles in the lower layer (lower winding) of the winding. Further, the sheet is likely to be broken near the center of the spool.
Then, since the sheets are wound one after another in a state of being stacked on the folded sheet to form a layer, the compressive force in the inward direction is increased at that portion, and the layer is easily crushed. Further, the mirror surface (so-called end surface) of the winding tends to have a chrysanthemum shape (also referred to as flower bloom, Star, or star shape) by the action of the compressive force.
Therefore, there is a problem that only 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 changing the frame, and which can stably wind a good product without any of the above-mentioned defects. Is what you do.

[0008]

According to the present invention, a new spool on an arm held at a standby position is brought into pressure contact with a drum,
Next, in a method of cutting a continuously sent sheet and winding the sheet around a new spool to change the frame, two sheets waiting for the center of the sheet after the new spool is pressed against the drum Cutting device cuts the sheet into parallel lines,
A glue unit is formed between these parallel lines with a gluing device, attached to the surface of the new spool, the tip of the glue forming part is cut with a cutting device provided separately, and the sheet is transferred to the new spool. And moving the cutting device toward both side edges of the sheet to cut the sheet into a triangular shape, and winding the sheet around a new spool.

[0009]

The frame replacement method of the present invention will be described in more detail with reference to the drawings. FIG. 1 shows a cutting device (3) for cutting a sheet in parallel from the upstream side in the running direction of the sheet, and a gluing device (4) above the sheet (2) just before entering the reel drum (1). Next, a cutting device (3) and a sizing device are provided in the moving means (6) so as to be a cutting device (5) for cutting the tip end of the glue forming portion, and the moving means is a frame. FIG. 9 is a view showing one embodiment when the optical module is fixed to the section (7).

As shown in FIG. 4, the cutting device (3) comprises a rotary round blade (8) for cutting a sheet and a motor (9) for rotating the round blade. Two such cutting devices (3) are installed in the center of the sheet, immediately upstream of the gluing device, and first cut the sheet into parallel lines as shown in FIG. The glue forming unit (10) is used to form the glue forming part (10), and the glue is adhered to the surface of the new spool (11). Form a piece 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 toward the driving side (left side in FIG. 1). Moved at high speed.

A cutting device (5) for cutting the tip of the glue forming section uses a nozzle (12) having a hole for ejecting an air jet at the tip as shown in FIG. Although the purpose of the present invention is achieved by jetting a jet, other cutting devices that can be used include a method of jetting a jet of high-pressure water. The rodless cylinder serving as the moving means serves the purpose of moving the cutting device at high speed toward both ends. However, the present invention is not limited to this embodiment, and any other means that can move the cutting device at high speed, such as a method of moving the cutting device using a guide rail, a chain, a wire, and the like, can be adopted as appropriate. .

The present invention can also be applied to a case where two round blades are fixed and the sheet is cut into parallel lines by the two round blades, or the sheet is cut into a triangular shape. However, if the parallel cutting line and the cutting device have an angle, the sheet may be broken at the moment the cutting edge of the cutting device is inserted, and the sheet may be cut into a triangular shape. If the cutting device is moved from the center of the sheet to the end of the sheet to cut the sheet, the body at the rear of the round blade will break the sheet, resulting in a jagged sheet cutting line. And the sheet may be broken starting from that portion.

Therefore, as shown in FIG. 3, an angle switching device (13) is provided so that when cutting a sheet in a parallel line shape, the cutting edge is inserted substantially in parallel with the sheet flow direction, and the sheet is cut in a triangular shape. It is desirable to switch the angle to the 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 the shaft of the drive motor, the drive motor is held by the holder (14), and the holder is pivotably mounted on the bearing (15). Support the holder and fix the holder to the rod of the small air cylinder (16) .When the cutting edge is inserted almost in parallel with the flow direction of the sheet, the air cylinder is not operated, but when the sheet is cut into a triangular shape. , The holder is swung to change the angle of the round blade. Note that the angle switching device is not limited to the above-described configuration, and any device having a structure in which the angle of the cutting edge of the round blade is switched to be used can be appropriately adopted.

The angle is calculated by the following equation.

[0015]

(Equation 1)

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

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. The round blade used in the cutting device has an appropriate cross-sectional shape, and the object of the present invention is achieved even when the round blade is fixed to the holder at any angle. However, if a double-edged round blade is used, the body of the round blade contacts the sheet during movement,
As a result, it is a major cause of breakage of the sheet. Therefore, as shown in FIG. When the round blade of the cutting device is fixed so as to face the side end in the direction in which the device moves, this is a method of making it easy to always cut the sheet when cutting the sheet in a triangular shape.

In the case where 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.
Insufficient rigidity of the blade makes it impossible to cut the sheet normally. On the other hand, when using a round blade with a single blade with a blade edge angle of 30 ° or more, it is said that the sheet is pressed with the blade rather than cutting the sheet. The action becomes strong, and the sheet is broken.

Furthermore, the cutting speed of the cutting device will be described in detail. The cutting speed greatly affects the sheet cutting ability. 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 the sheet. . Therefore, it is necessary to move the knife positively.

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 running direction of the sheet, when the peripheral speed of the round blade is 1000 m / min, the speed difference is 0. It becomes difficult to cut the sheet. On the other hand, when the rotation of the round blade is rotated in the direction opposite to the running direction of the sheet, the speed ratio increases, but when the peripheral speed of the round blade is low, the partial load on the blade becomes excessive, while the sheet speed decreases. When the peripheral speed is higher than the peripheral speed of the blade, the above-mentioned knife is fixed and the sheet is moving, so that the cutting is not performed well.

Therefore, it is desirable that the rotational speed of the round blade be as high as possible with respect to the sheet, and it is desirable that the rotational speed be equal to or higher than the traveling speed of the sheet without distinction between forward and reverse rotation. The protrusion amount of the blade with respect to the sheet, that is, the bite allowance is 1
mm or more is desirable. When the protruding amount of the blade with respect to the sheet is 1 mm or less, if a portion with a low tension in the flow direction of the sheet passes during cutting of the sheet, or if vibration occurs in the sheet, the blade edge of the round blade is This causes a problem that an uncut portion is generated at the cutting line of the sheet.

[0022]

According to the frame changing method of the present invention, a triangular sheet having a protruding end portion is always obtained, so that the winding of the sheet around the spool can be performed extremely smoothly. Therefore, since the winding of the sheet around the spool is completed in a minimum time, a large number of defective sheets are not generated.
Excellent production efficiency can be achieved, and the burden on workers is greatly reduced. In addition, since the occurrence of sheet breakage can be effectively prevented, it is possible to stably obtain a good-quality product having very few defective portions.
It is particularly effective when used for a sheet having a strong paper strength.

[Brief description of the drawings]

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

FIG. 2 is a plan view illustrating a process of forming a triangular piece in which the leading end of the sheet is a convex piece when the 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 that cuts sheets in parallel lines (4) Gluing device (5) Cutting device that cuts the tip of the glue forming part (6) Moving means (7 ) Flame section (8) Rotating round blade (9) Motor (10) Glue forming section (11) New spool (12) Nozzle section (13) Angle switching device (14) Holder section (15) Bearing (16) Air cylinder (17) Stopper

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Mitsuo Yamamoto 5007 Itozakicho, Mihara City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Mihara Works (56) References JP-A-63-55026 (JP, A) JP-A-63 −295354 (JP, A) JP-A-3-200655 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65H 19/28, 19/18

Claims (5)

(57) [Claims] 1. A method in which a new spool on an arm held at a standby position is brought into contact with a drum, a sheet continuously fed is cut, and the sheet is wound around the new spool to change a frame. After the new spool is brought into contact with the drum, the two cutting devices waiting at 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 on the surface of the new spool, and cut it with a cutting device with the tip of the glue forming part separately provided Transferring the sheet to a new spool, moving the cutting device toward both side edges of the sheet, cutting the sheet into a triangular shape, and winding the sheet around the new spool. 2. An angle switching device is provided in each of the two cutting devices. When the two cutting devices cut the sheet in parallel, the cutting device is inserted substantially in parallel with the sheet flow direction. 2. The method according to claim 1, wherein, when the sheet is cut into a triangular shape, the angle of the cutting device is switched so that the cutting line is substantially parallel to the cutting device. 3. A round blade with a single edge having an edge angle of about 5 ° to 30 ° is used as a cutting device, and a surface of the blade edge that is not an inclined surface faces a side end in a direction in which the cutting device moves. 3. The method according to claim 1, further comprising a cutting device. 4. The method according to claim 1, wherein the rotation speed of the cutting device is higher than the running speed of the sheet. 5. The frame changing method according to claim 1, wherein the amount of protrusion of the cutting edge of the cutting device with respect to the sheet is 1 mm or more.