JP2796527B2 - How to cut out circular paper - 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 cutting out circular paper.

[0002]

2. Description of the Related Art In order to cut out circular paper from flat paper, a circular cutting operation (referred to as "round cutting") is required, and the following techniques have been conventionally used.

As shown in FIG. 11, using a mold blade 14 formed in a circular shape, the mold blade 14 is pressed against a flat paper 1c to punch out a circular paper. According to this method, it is possible to obtain a plurality of circular sheets by a single punching by stacking a plurality of sheets of paper 1c (hereinafter referred to as “prior art 1”).

[0004] As shown in FIG. 12, the arm 2 provided with a cutter 16 at the distal end is rotated like a compass on a flat sheet of paper 1 c around the base end, and a circular cut 15 is made by the cutter 16. Cut out circular paper. Also in this method, a plurality of circular sheets can be obtained by one operation by stacking a plurality of sheets of paper to be cut out (hereinafter, referred to as “prior art 2”).

[0005]

However, prior art 1 has the following problems. A mold blade having the same size (the same length as the circumference of the circular paper) as the size of the circular paper to be rounded is required, and the amount of the blade used is large, which is very uneconomical. In addition, several sets of mold blades having different sizes must be prepared for each size of the circular paper to be rounded, and replacement work is required each time, which is very disadvantageous in cost and efficiency.

[0006] Further, there has conventionally been a facility for continuously supplying paper by winding the paper in a roll shape and moving the paper while sequentially unwinding the paper. There is a problem that the movement of the paper must be stopped, and the movement and stop are repeated intermittently, resulting in poor production efficiency.

In the prior art 2, since a cutter is used, the amount of the blade is smaller than that in the prior art 1, which is economical, and by changing the mounting position of the cutter 16 on the arm 2 in the radial direction. The size of the circular paper can be changed. However, as shown in the prior art 1, in the work performed by winding while moving in a roll shape and moving sequentially while unwinding, similar to the prior art 1, in that the movement of the band-shaped paper must be stopped when cutting out the circular paper. In addition, there is a problem that production efficiency is poor due to intermittent work.

As described above, the conventional production of circular paper requires a large amount of capital investment and has a problem that its work efficiency is poor. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for cutting circular paper, which can produce circular paper of a desired size at low cost and with high efficiency.

[0009]

Means for Solving the Problems In order to solve the problems of the prior art, the present inventor has disclosed in Japanese Patent Application No. 7-307686.
The present inventors have applied for a method of continuously cutting a circular sheet from a moving band-shaped paper by providing the band-shaped paper so as to be movable in a longitudinal direction, providing a cutting means so as to be movable in a direction perpendicular to the moving direction of the band-shaped paper. The present invention is a further improvement of the above-described method for cutting out circular paper.

According to the first aspect of the present invention, the strip-shaped paper is provided so as to be movable in the longitudinal direction, and the first cutting means capable of cutting the strip-shaped paper is provided so as to be movable in a direction orthogonal to the moving direction of the strip-shaped paper. At a position downstream of the position where the first cutting means is provided by a predetermined distance, a second cutting means capable of cutting the band-shaped paper is provided so as to be movable in a direction orthogonal to the moving direction of the band-shaped paper. And moving the first cutting means and the second cutting means to cut out the circular paper and cut out the circular paper, wherein the moving direction of the linear paper is the y-axis, and Coordinates with the moving direction of the first cutting means and the second cutting means as the x-axis are set, and the position and moving speed of the first cutting means on the x-axis are expressed by the following equations (1) and (2): x = √ ^{(2vAt-v 2 t 2)} ··· (1 ) Dx / dt = vA-v 2 t / √ (2vAt-v 2 t 2) ··· (2) where, x: the position in the x-axis of the first cutting means A: circular Paper radius t: elapsed time v: Determined by the moving speed of the strip of paper, convert the obtained value of the position x into a distance on the plus side of the x-axis from the intersection of the x-axis and the y-axis, and make a semicircular cut in the strip of paper, The second cutting means is positioned at the cutting start point of the semicircular cut, and x of the second cutting means is
The position and the moving speed on the axis are expressed by the following equations (3) and (4): x = −√ (2vAt−v ² t ² ) (3) dx / dt = − {vA−v ² t /} (2vAt) −v ² t ² )｝ (4) The absolute value of the determined position x is converted into a distance on the negative side of the x-axis from the intersection of the x-axis and the y-axis to obtain the semicircle. A semicircular cut is made on the opposite side of the cut, where: x: position on the x-axis of the second cutting means A: radius of the circular paper t: elapsed time v: moving speed of the strip of paper It is characterized by making circular cuts.

According to a second aspect of the present invention, the strip-shaped paper is provided so as to be movable in a longitudinal direction, and the first cutting means capable of cutting the strip-shaped paper is provided so as to be movable in a direction orthogonal to the moving direction of the strip-shaped paper. At a position downstream of the position where the first cutting means is provided by a predetermined distance, a second cutting means capable of cutting the band-shaped paper is provided so as to be movable in a direction orthogonal to the moving direction of the band-shaped paper. At the speed of
In the method of moving the cutting means and the second cutting means to cut out the circular paper by making a cut in the band-shaped paper, semicircular concave portions and semicircular convex portions are provided continuously and endlessly alternately. Provided a rotatable cam around the axis,
A first roller and a second roller that can run in contact with the concave and convex portions of the cam are provided so as to be movable according to changes in the height of the concave and convex portions, and the first cutting means is provided in the first and second rollers. The second cutting means is movably provided in accordance with the movement of the second roller, the cam is rotated at a predetermined speed, and the second cutting means is rotated by rotation of the cam. Moving the first cutting means in accordance with a change in the height of one roller to make a semicircular cut in the strip of paper, positioning the second cutting means at a cutting start point of the semicircular cut; The second cutting means is moved in accordance with a change in the height of the second roller due to the rotation of the cam, and a semicircular cut is made on the opposite side of the semicircular cut, thus forming a circular shape on the strip of paper. It has the characteristic of making a cut It is.

[0012]

Next, the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an embodiment of the present invention, FIG. 2 is a perspective view, and FIG. 3 is a plan view. Reference numeral 1 in the drawing denotes a band-shaped paper, which is wound around a coil by a coiler (coiled paper 1b) and can be unwound. In the present embodiment, an example is shown in which the belt-shaped paper 1 is used in a double form, but the number of overlapping sheets is arbitrary. The strip-shaped paper 1 unwound from the coil 1b moves in the longitudinal direction via a plurality of rolls 3. In the downstream of the roll 3a, the band 1
Is kept horizontal, where the cutting is performed.

In this cutting section, a first guide rail 6 is provided horizontally above the moving strip 1 in a direction perpendicular to the moving direction of the strip 1. Further, at a position downstream of the first guide rail 6 by a predetermined distance, a second guide rail 7 is provided horizontally above the band 1 in a direction orthogonal to the moving direction of the band 1. The first guide rail 6 is provided with a first cutting means 4, and the first cutting means 4 is guided by the first guide rail 6 and is movable in a direction orthogonal to the moving direction of the web 1. The second guide rail 7 has a second
A cutting means 5 is provided, and the second cutting means 5 is guided by a second guide rail 7 and is movable in a direction orthogonal to the moving direction of the band-shaped paper 1.

The first cutting means 4 and the second cutting means 5
At its lower end, a cutting mechanism 11 for cutting the band-shaped paper 1 is provided. In this embodiment, a cutting blade using a rotary round blade is used as the cutting mechanism 11. The cutting mechanism 11 may be any of the known cutting mechanisms, such as the above-mentioned rotary round blade, as shown in (1) to (3) below, which are considered to be most suitable according to the cutting conditions such as the quality of the paper.

Cutting blade using rotary round blade Laser cutter Air cutter Cutting blade formed of square blade Other cutter blades The first cutting means 4 and the second cutting means 5 cut / non-cut the moving strip 1 ( (Non-contact state) can be switched. Reference numeral 8 denotes a cradle for the first cutting means 4 and the second cutting means 5. In FIG. 3, the cut made by the first cutting means 4 is indicated by a solid line 1 for convenience of explanation.
2, the cuts made in the strip 1 by the second cutting means 5 are indicated by broken lines 13. Needless to say, a normal cut is actually made.

Further downstream of the cutting section, a box 9 for accommodating the cut circular paper is provided at a position lower than the receiving table 8. The accommodation box 9 is provided with a vibrator 10 for applying vibration so that the circular papers 1a sequentially fed are stacked without being collapsed.

Next, the first aspect of the present invention will be described with reference to FIGS. FIG. 4 is a front view illustrating the principle of the first invention of the present application. The movement of the web at the speed v can be assumed to mean that the cutting means moves at the speed v. The moving direction of the band is defined as the y direction, and the moving direction of the cutting means is defined as the x direction orthogonal to the moving direction of the band. As shown in FIG. 4, the y-axis is set in the moving direction of the band paper, and the X-axis in which the cutting means moves in a direction perpendicular to the y-axis is set.

The equation of the trajectory of the first semicircle in the solid line portion of FIG. 4 is x ² + (y−A) ² = A ² ..., And cutting means after y = vt. Is the position of the equation.

From the formula, x = ± {A ² − (y−A) ² } = ± √ (2Ay−y ² ) Assuming that only the positive part (positive side) of x is considered, x = √ (2Ay− y ² )... From the equation, x = √ (2vAt−v ² t ² )... is an equation representing the position of the cutting means after t seconds.
Differentiating this, dx / dt = vA−v ² t / √ (2vAt−v ² t ² ) (3) The equation is an equation representing the moving speed of the cutting means after t seconds.

The position of the cutting means in the x-direction and the moving speed of the cutting means are obtained by the following equations. Here, x: the position of the cutting means on the x-axis A: radius of the circular paper t: elapsed time v: moving speed of the strip-shaped paper The obtained value of the position x is the plus of the x-axis from the intersection of the x-axis and the y-axis. Make a semicircular cut in the strip of paper in terms of the distance on the side.

In the above description, only the positive portion, that is, the plus side in FIG. 4 is shown, but the negative portion,
That is, on the minus side in FIG. 4, the expression and the expression may be given a minus (-) sign. That, x = -√ (2vAt-v 2 t 2) ··· dx / dt = - {vA-v 2 t / √ (2vAt-v 2 t 2)} ··· However, in practice, the distance Ya Since there is no minus (-) in the speed, the absolute value of the value obtained by the equation is calculated on the minus side of the x axis from the intersection of the coordinate axes, and the obtained value is the distance on the minus side of the x axis from the intersection of the coordinate axes. Then, make a semicircular cut in the band paper.

Next, referring to FIGS. 5 and 6, a description will be given of a step of cutting a circular sheet from a band-shaped sheet according to the first aspect of the present invention. A and B in FIGS. 5 and 6 indicate specific positions of the belt-shaped paper.

The web 1 is moved at a predetermined speed v.
Coordinates are set so that the moving direction of the band-shaped paper 1 is the y-axis, and the moving directions of the first cutting means 5 and the second cutting means 4 are the x-axis, and the position and the moving speed of the first cutting means on the x-axis are as follows. (1) and (2) ^{x = √ (2vAt-v 2} t 2) ··· (1) dx / dt = vA-v 2 t / √ (2vAt-v 2 t 2) ··· (2 Here, x: the position of the first cutting means on the x-axis A: the radius of the circular paper t: the elapsed time v: the moving speed of the strip of paper, and the obtained value of the position x is the intersection of the x-axis and the y-axis A semicircular cut 12 is made in the band-shaped paper 1 in terms of the distance on the positive side of the x-axis from.

Next, the second cutting means 5 is positioned at the cutting start point 12a of the semicircular cut, and the position and the moving speed of the second cutting means 5 on the x-axis are given by the following equations (3) and (4).
Wherein ^{x = -√ (2vAt-v 2} t 2) ··· (3) dx / dt = - {vA-v 2 t / √ (2vAt-v 2 t 2)} determined by (4), The obtained absolute value of the position x is converted into a distance on the negative side of the x-axis from the intersection of the x-axis and the y-axis, and a semi-circular cut 13 is formed on the opposite side of the semi-circular cut 12.

Here, x: the position of the second cutting means on the x-axis A: the radius of the circular paper t: the elapsed time v: the moving speed of the belt-like paper Thus, the circular discontinuity consisting of the cuts 12 and 13 in the belt-like paper 1 Can be put in. FIGS. 5 and 6 show the distance between the first cutting means 4 and the second cutting means 5 for convenience of explanation.
Although the diameter is the same as the diameter of the circular paper to be cut out, the size of this interval is arbitrary. Also, one piece of circular paper was cut out,
As shown in FIG. 3, it can cut out continuously.

Next, a second aspect of the present invention will be described with reference to FIGS. 1 to 3 and FIGS. 1, 2 and 3 are the same in the second invention of the present application. FIG. 7 is a side view of the cam according to the second invention of the present application, FIG. 8 is a plan view of the cam,
FIG. 9 is an explanatory diagram showing the relationship between the rollers and the cam and the cutting means.

As shown in FIG. 7 to FIG.
In the upper end portion, semicircular concave portions 17a and semicircular convex portions 17b are provided alternately and endlessly. The cam 17 is rotatable about its axis. The cam 17 is provided with a roller 18 so as to rotate and run while always in contact with the upper end surface thereof.
Numeral 8 is movable up and down in the direction indicated by arrow C in FIG. The rotation of the cam 17 causes the roller 18 to rotate.
Rotates and runs, and moves up and down in the direction of arrow C with the movement width between the lower end of the concave portion and the upper end of the convex portion of the cam 17. Further, the roller 18 has an arrow D in FIG.
Does not move in the direction indicated by. Then, as shown in FIG. 9, the first cutting unit 4
The roller 18 is movable along the first guide rail 6 in accordance with the vertical movement of the roller 18. The second cutting means 5 also has the same configuration as the first cutting means 4 in which a second roller (not shown) and the second cutting means are interlocked.

Next, the step of cutting a circular sheet from a band-shaped sheet according to the present invention will be described. By synchronizing the rotational speed of the cam 17 and the moving speed of the web 1, a shape similar to the concave and convex portions of the cam 17, that is,
The shape in which the semicircular cuts are alternately continuous is cut into the web 1 by the first cutting means 4. Further, the second cutting means is positioned at the cutting start point 12a of the semicircular cut 12 cut by the first cutting means 4, and the first cutting means 4
A semi-circular cut is made on the opposite side of the semi-circular cut cut by. Thus, a circular cut is made in the web 1 by the first cutting means and the second cutting means.

FIG. 10 shows a line for cutting out circular paper.
It is a top view which shows the embodiment provided with three lines of a, b, and c. As shown in FIG. 10, the second cutting means 5a, the first cutting means 4a, the second cutting means 5b, the first cutting means 4b, the second cutting means 5c, and the first
The cutting means 4c are provided in this order. Thus, a,
By simultaneously operating the three lines b and c, the circular paper can be cut out efficiently.

[0030]

As described above, according to the present invention, the following industrially useful effects are provided. The circular sheet can be cut out without stopping the movement of the band-shaped paper by using the unwinding method using the coil, so that the working efficiency is greatly improved. Since the circular paper can be continuously cut out in the longitudinal direction of the belt-shaped paper without separating from each other, there is no waste of paper, which is economically advantageous. By moving the cutting means to the full width of the strip, the strip having substantially the same diameter as the diameter of the circular paper to be cut can be used, and there is no waste of paper, which is economically advantageous. By changing the moving distance of the cutting means, the size (diameter) of the circular paper to be cut can be easily changed. By increasing the width of the band-shaped paper, increasing the number of cutting means and providing multiple lines for cutting out circular paper, and operating these lines simultaneously, it is possible to efficiently cut out circular paper and improve production efficiency. can do.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing one embodiment of the present invention.

FIG. 3 is a plan view showing an embodiment of the present invention.

FIG. 4 is a front view illustrating the principle of the first invention of the present application.

FIG. 5 is a plan view illustrating a step of cutting out a circular sheet from a band-shaped sheet according to the first invention of the present application.

FIG. 6 is a plan view illustrating a step of cutting out a circular sheet from a band-shaped sheet according to the first invention of the present application.

FIG. 7 is a side view of a cam according to the second invention of the present application.

FIG. 8 is a plan view of a cam according to the second invention of the present application.

FIG. 9 is an explanatory view showing a relationship between a roller and a cam and a cutting means according to the second invention of the present application.

FIG. 10 shows lines a, b, and c for cutting out circular paper.
It is a top view which shows embodiment of this invention which provided the line.

FIG. 11 is a perspective view showing a prior art 1 of a method for manufacturing circular paper.

FIG. 12 is a plan view showing a prior art 2 of a method for manufacturing a circular paper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Band-shaped paper 1a Circular paper 1b Coiled paper 1c Paper 2 Arm 3, 3a Roll 4, 4a, 4b, 4c First cutting means 5 5a, 5b, 5c Second cutting means 6 First guide rail 7 Second guide rail Reference Signs List 8 receiving stand 9 storage box 10 vibrator 11 cutting mechanism 12 cut cut into band paper by first cutting means 12a cutting start point 13 cut cut into band paper by second cutting means 14 mold blade 15 cut 16 cutter 17 cam 17a Recess 17b Convex 18 Roller A, B Specific position of moving strip paper

Claims (2)

(57) [Claims] 1. A strip paper is provided so as to be movable in a longitudinal direction, a first cutting means capable of cutting the strip paper is provided so as to be movable in a direction orthogonal to a moving direction of the strip paper, and the first cutting means is provided. At a position downstream of a predetermined distance from the set position, a second cutting means capable of cutting the band-shaped paper is provided so as to be movable in a direction orthogonal to the moving direction of the band-shaped paper, and the band-shaped paper is moved at a predetermined speed. A method of moving the first cutting means and the second cutting means to cut out the circular paper by making a cut in the band-shaped paper, wherein the moving direction of the band-shaped paper is a y-axis; The coordinates with the moving direction of the second cutting means as the x-axis are set, and the position and the moving speed of the first cutting means on the x-axis are expressed by the following equations (1) and (2). X = √ (2vAt−v ² t) ² ) ... (1) dx / dt = vA- v ² t / √ (2vAt−v ² t ² ) (2) where x: position of the first cutting means on the x-axis A: radius of the circular paper t: elapsed time v: moving speed of the band paper The value of the obtained position x is converted to a distance on the plus side of the x-axis from the intersection of the x-axis and the y-axis, and a semicircular cut is made in the band-shaped paper. Positioned at the cutting start point of the circular cut, the position and moving speed of the second cutting means on the x-axis are expressed by the following equations (3) and (4): x = −√ (2vAt−v ² t ² ) (3) dx / dt = − {vA−v ² t / {(2vAt−v ² t ² )}} (4), and the absolute value of the value of the obtained position x is determined on the x-axis and the y-axis. A semi-circular cut is made on the opposite side of the semi-circular cut in terms of the distance on the negative side of the x-axis from the intersection of 2 position in the x-axis of the cutting means A: circular Paper radius t: elapsed time v: speed of movement of the paper web thus cut out method of a circular sheet, characterized in that to put a circular cut in the paper web. 2. A strip paper is provided so as to be movable in a longitudinal direction, a first cutting means capable of cutting the strip paper is provided so as to be movable in a direction orthogonal to a moving direction of the strip paper, and the first cutting means is provided. At a position downstream of a predetermined distance from the set position, a second cutting means capable of cutting the band-shaped paper is provided so as to be movable in a direction orthogonal to the moving direction of the band-shaped paper, and the band-shaped paper is moved at a predetermined speed. , The first cutting means and the second
In the method of cutting a strip of paper by moving a cutting means to cut a strip of the strip-shaped paper, a semicircular concave portion and a semicircular convex portion are alternately and continuously provided on an endless annular cam. And a first roller and a second roller that are rotatable in contact with the concave and convex portions of the cam are provided so as to be movable in accordance with changes in the height of the concave and convex portions. A first cutting means provided movably in accordance with the movement of the first roller;
The second cutting means is provided so as to be movable corresponding to the movement of the second roller, rotates the cam at a predetermined speed, and corresponds to a change in height of the first roller due to the rotation of the cam. Moving the first cutting means to make a semicircular cut in the band-shaped paper; positioning the second cutting means at the cutting start point of the semicircular cut; height of the second roller by rotation of the cam; The second cutting means is moved in accordance with the change of the semicircular cut to make a semicircular cut on the opposite side of the semicircular cut, and thus a circular cut is made in the band-shaped paper. How to cut out.