JP2002072372A - Cutter for image forming sheet body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut an image forming sheet with high accuracy without being affected by the thickness, brittleness, etc., of a coating film. SOLUTION: This cutter has first and second blade members 40 and 42 for cutting a heat developable photosensitive material web 12. The blade edge angle α3 deg. of the first blade member is set within a range from 15 to 40 deg. or from 85 to 90 deg. and the shear angle β2 deg. of the first and second blade edges 40 and 50 of the first and second blade members 40 and 42 are set within a range from 0.3 to 5 deg.. In addition, the clearance C2 between the first and second blade edges 40 and 50 is set at a value below 15% of the thickness of the heat developable photosensitive material web 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming sheet cutting apparatus for cutting or slitting an image forming sheet.

[0002]

2. Description of the Related Art In general, an image forming sheet is made of X
A wet developing material such as a ray film or a heat developing material is used. In this type of image forming sheet, a web wound in a roll is fed out in the longitudinal direction, and after a plurality of slits are formed in the web in the width direction, the web is orthogonal to the web feeding direction. Cut in a predetermined direction (cross cut).

[0003] By the way, especially in the case of a heat-developable material, an image forming layer (coating film) is laminated on a base layer as a multilayer film.
It becomes brittle. For this reason, the surface layer film is peeled off in the form of a whisker during cutting of the heat developing material,
Problems such as cracks in the image forming layer are likely to occur.

[0004] More specifically, as shown in FIG. 10, a heat developing material 1 includes a base layer 2 and an image forming layer 3 including a photosensitive layer or a heat-sensitive layer. Then, the heat developing material 1
When cross-cutting is performed, on the upper blade side cut surface, a whisker-like surface layer peeling 4 and a surface layer crack 5 occur on the outermost layer of the image forming layer 3, while on the lower blade side cut surface, the inside of the image forming layer 3 is cut. It has been pointed out that a crack 6 occurs in the steel sheet.

On the other hand, as shown in FIG.
When slitting is performed, there is a problem that a swelling 7 of the image forming layer 3 is generated on the cut surface of the upper blade, and a crack 8 is generated in the image forming layer 3 on the cut surface of the lower blade.

Therefore, for example, Japanese Patent No. 2,791,82
As disclosed in No. 0, at least 1
The cutting edge of the two cutter blades used for cutting in combination is 75 ° to 90 °, and the cutting edge between the cutting edges in a direction perpendicular to the cut surface is applied to the cutting of the photographic light-sensitive material coated and dried. There is known a method for cutting a photographic light-sensitive material in which the clearance is set to a width of 5% to 15% of the thickness of the photographic light-sensitive material to be cut.

[0007]

However, the above-mentioned prior art is directed to a wet developing material such as an X-ray film, and has a small number of coating films and a thin coating film thickness. However, this is not due to this coating film, and there is a problem of sharpness related to the PET base which is a film base material. Therefore, it has been pointed out that the coating film is formed by laminating a multi-layered film, and that the coating film cannot be effectively coped with the above-described conventional technology for cutting the thick and brittle thermal developing material. I have.

The present invention solves this kind of problem, and an image forming sheet cutting apparatus which can effectively cope with the cutting operation of a heat developing material and which can simplify the structure. The purpose is to provide.

[0009]

According to the present invention, there is provided an image forming sheet cutting apparatus comprising first and second blade members for cutting (cross cutting) the image forming sheet. The blade edge angle of the first blade member that comes into contact with the image forming layer side of the sheet body is set within a range of 15 ° to 40 °, or 85 ° to 90 °,
The shear angle between the first and second cutting edges that form the first and second blade members sandwiches the image forming sheet body is 0.
The gap between the first blade edge and the second blade edge in the direction intersecting the cutting direction is set to a value of 15% or less of the thickness of the image forming sheet member. Have been.

As described above, in the first and second blade members, by setting the blade edge angle, the shear angle, and the gap between the blade edges to predetermined values, the image forming sheet body to be cut has surface cracks and surface layers. There is no occurrence of peeling or cracking in the image forming layer, and a highly accurate cutting process can be efficiently performed with a simple configuration.

In the present invention, the image forming apparatus further includes first and second rotary blade members for slitting the image forming sheet, wherein the first rotating blade first contacts the image forming layer of the image forming sheet. The blade edge angle of the blade member is 15 ° to 40 °
Or the angle is set in the range of 85 ° to 90 °, and the shear angle between the first and second blades of the first and second rotary blade members that sandwiches the image forming sheet is 10 °. And the gap between the first and second cutting edges in a direction intersecting the slit direction is set to a value of 15% or less of the thickness of the image forming sheet member. .

[0012] Thus, the image forming sheet body to be slit does not bulge or cracks in the image forming layer do not occur, and the slitting of the image forming sheet body is performed with high accuracy and with a simple configuration. Performed efficiently.

[0013]

FIG. 1 is a perspective view showing a schematic configuration of a processing system 10 in which an image forming sheet cutting apparatus according to an embodiment of the present invention is incorporated.

An upstream side of the processing system 10 is provided with a web delivery section 14 on which a photothermographic material web (thermal development material) 12 is mounted in a roll shape. The web delivery section 14 is delivered from the web delivery section 14. A slitter device (cutting device) 16 and a cross cutter device (cutting device) 18 are arranged toward the downstream side in the feeding direction (arrow A direction) of the photothermographic material web 12. On the downstream side of the cross cutter device 18, there is provided a stacking unit 22 for stacking the image forming sheet bodies 20 cut at predetermined dimensions.

The photothermographic material web 12 has a base layer 1
An image forming layer (photosensitive layer) 12b is applied on 2a, and the thickness of the entire image forming layer 12b is set to about 30 μm.

As shown in FIGS. 2 and 3, a slitter device 16 is disposed with the photothermographic material web 12 interposed therebetween, and has first and second rotary blades for slitting the photothermographic material web 12. It has members 24 and 26.
As shown in FIG. 2, the first rotary blade member 24 first comes into contact with a reference virtual line O orthogonal to the surface direction of the photothermographic material web 12 and the image forming layer 12 b of the photothermographic material web 12. The cutting edge angle α1 ° between the cutting edge line 30 including the first cutting edge 28 and the cutting edge line 30 is set in a range of 15 ° to 40 ° or 85 ° to 90 °. The first rotary blade member 24 includes:
A predetermined clearance angle γ1 ° from the reference virtual line O is provided.

The second rotary blade member 26 includes a cutting edge line 34 including a second cutting edge 32 that first comes into contact with the base layer 12a on the side opposite to the image forming layer of the photothermographic material web 12, and a reference virtual line O. The formed cutting edge angle α2 ° is set in the range of 85 ° to 90 °. The second rotary blade member 26 has a clearance angle γ2 ° from the reference virtual line O and a rake angle θ1 ° from a plane parallel to the photothermographic material web 12.

As shown in FIG. 3, the first and second rotary blade members 24 and 26 are partially arranged in a superimposed state with a predetermined meshing depth H. From 36, the angle between the tangents, that is, the shear angle β1 °, is set in the range of 10 ° to 20 °.

As shown in FIG. 2, the gap C1 between the first and second cutting edges 28, 32 of the first and second rotary blade members 24, 26 is 15% or less of the thickness of the photothermographic material web 12. Is set to a value. The gap C <b> 1 is set by forming a chamfered portion 38 on one of the first and second rotary blade members 24 and 26, for example, on the outermost peripheral portion of the second rotary blade member 26.

Each of the clearance angles γ1 ° and γ2 ° is set to 5 ° or less, and the width dimension of the cutting edge line 30 of the first rotary blade member 24 is such that the cutting edge angle α1 ° is in the range of 85 ° to 90 °. If the distance is within the range, the distance is set in the range of 0.1 mm to 1 mm. When the cutting edge angle α1 ° is in the range of 15 ° to 40 °, the cutting edge shape of the first rotary blade member 24 is set as shown in FIG.

As shown in FIGS. 5 and 6, the cross cutter device 18 is disposed with the photothermographic material web 12 interposed therebetween, and has first and second blades for cross-cutting the photothermographic material web 12. It has members 40 and 42. The first blade member 40 constitutes a movable blade, while the second blade member 4
Reference numeral 2 denotes a fixed blade.

The first blade member 40 has a first blade edge 44 which comes into contact with the image forming layer 12b of the photothermographic material web 12 first.
And the cutting edge angle α3 ° between the cutting edge line 46 including the first cutting edge 44 and the reference virtual line O is set in a range of 15 ° to 40 ° or 85 ° to 90 °. When the cutting edge angle α3 ゜ is in the range of 85 ° to 90 °, the width of the cutting edge line 46 is 0.1 mm to 15 mm, and when the cutting edge angle α3 内 is in the range of 15 ° to 40 °, And the shape shown in FIG. The first blade member 40 is provided with a clearance angle γ3 ゜ from the reference virtual line O, and the clearance angle γ3
゜ is set in the range of 0 ° to 5 °.

The second blade member 40 is provided with a chamfered portion 48, a blade edge line 52 including a second blade edge 50 which first comes into contact with the surface of the photothermographic material web 12 on the side of the base layer 12a, and a reference virtual line. The cutting edge angle α4 ° formed with the line O is 8
It is set within the range of 5 ° to 90 °. Second blade member 42
Is provided with a clearance angle γ4 ° from the reference imaginary line O, the clearance angle γ4 ° is set to 5 ° or less, and a rake angle θ2 ° from a plane parallel to the photothermographic material web 12 is provided. I have. The gap C2 between the first and second cutting edges 44 and 50 is set to a value of 15% or less of the thickness of the photothermographic material web 12.

As shown in FIG. 5, the first and second cutting edges 4
4, 50, the shear angle β2 ° sandwiching the photothermographic material web 12 is set in the range of 0.3 ° to 5 °. The intersection angle φ ゜ of the first and second blade members 40, 42 is
0 ° to 5 ° / 1000. When the gap C2 is set to 0%, the intersection angle φ０0
Is set to give an appropriate contact pressure.

The first and second blade members 40 and 42 have a shear angle β2 ゜ set in one direction.
As shown in (1), the first and second blade members 40a and 42a in which the shear angle β2 ゜ is set from both directions may be used.
This makes it possible to set the shear angle of the first blade member 40 a to twice the same amount of movement as the first blade member 40.

The operation of the processing system 10 configured as described above will be described below.

As shown in FIG. 1, the web delivery unit 14
Roll-shaped photothermographic material web 12 mounted on
Is sent out in the direction of arrow A, first, the slitter device 1
6, the photothermographic material web 12 is slit at two locations in the width direction (the direction of arrow B).

In the slitter device 16, as shown in FIGS. 2 and 3, the first and second rotary blade members 24 and 26 are driven to rotate, and the first and second rotary blade members 24 and 26 are rotated.
The first and second cutting edges 28, 32 first contact the surfaces of the image forming layer 12b and the base layer 12a of the photothermographic material web 12, and the cutting of the photothermographic material web 12 is started. First and second rotary blade members 24, 26
Are overlapped by a predetermined engagement depth H, and a slit is formed in the photothermographic material web 12 along the direction of arrow A under the rotation of the first and second rotary blade members 24, 26. Will be done.

Next, in the cross cutter device 18, the first
And the second blade members 40 and 42 are the photothermographic material web 1
2, the first blade member 40 moves vertically with respect to the second blade member 42 in the width direction (arrow B direction) orthogonal to the feeding direction (arrow A direction). Therefore, as shown in FIG. 5 and FIG.
The first and second cutting edges 44, 50 of the blade members 40, 42
Contact with the image forming layer 12b and the base layer 12a is started along the width direction of the photothermographic material web 12, and the photothermographic material web 12 is cross-cut. Thereby, the sheet bodies 20 are simultaneously formed in three rows and conveyed in the direction of the arrow A, and are stacked by the stacking unit 22 by a predetermined number.

In this case, in the cross cutter device 18, the cutting edge angle α3 ° of the first blade member 40, the shear angle β2 ° of the first and second blade members 40 and 42, and the first and second blade members 40, An experiment was conducted in which the value of the gap C2 between the first and second cutting edges 44, 50 of 42 was variously changed, and the surface crack 5, the surface peeling 4, and the crack 6 in the image forming layer 3 were evaluated as shown in FIG. . The results are shown in Table 1. The evaluation items “×”, “」 ”, and“ 」” in Table 1 are based on the evaluation criteria shown in Table 2.

[0031]

[Table 1]

[0032]

[Table 2]

Each evaluation item in Table 1 is, from left to right,
Surface cracks 5, surface peeling 4, and cracks 6 in the image forming layer 3 are displayed in this order. The gap C2 is 15%
The following predetermined values are set.

Thus, the cutting edge angle α of the first blade member 40
When 3 ° is 20 ° and 90 ° and shear angle β2 ° is in the range of 0.3 ° to 5 °, it is possible to cut the photothermographic material web 12 with high quality without causing any trouble. It has become possible. Further, a more detailed experiment was performed on the cutting edge angle α3 °. In this experiment, the cutting edge angle α3 ° was 15 ° to 40 ° and 85 ° to 9 °.
Good results were obtained within the range of 0 °.

When the gap C2 was changed, it was examined whether or not a whisker was generated in the base layer 12a.
As shown in the figure, when the gap C2 was 15% or less, no whiskers were generated, and good results were obtained.

[0036]

[Table 3]

The above experiment was carried out using a photothermographic material web 12 having a thickness of about 30 μm in the image forming layer 12b. When the same experiment was performed using the photothermographic material web 12 of about 20 μm, similar results were obtained.

On the other hand, in the slitter device 16, similarly, the blade angle α1 ° of the first rotary blade member 24, the shear angle β1 ° of the first and second blades 28 and 32, and the first and second blades 28 and 32 are similarly provided. Of the image forming layer 3 by changing the gap C1 of the image forming layer 3 in various ways, as shown in FIG.
An experiment was performed to evaluate the degree of The results are shown in Table 4. In Table 4, the evaluation items are shown from left to right in the order of a bulge 7 and a crack 6 in the image forming layer 3, and the degree is evaluated in three stages of each evaluation item “×”, “△”, and “○”. Are shown separately. The evaluation criteria are as shown in Table 5.

[0039]

[Table 4]

[0040]

[Table 5]

Table 4 shows the results of an experiment conducted under the conditions that the shear angle β1 ° is 15 ° and the gap C1 is 0%. Therefore, the cutting edge angle α1 ° is 15 ° to 4 °.
The photothermographic material web 12 was successfully cut at 0 ° and within the range of 85 ° to 90 °. further,
Regarding the shear angle β1 ° and the gap C1, the base layer 12a
An experiment was performed to determine whether or not a beard was generated. The results are shown in Table 6.

[0042]

[Table 6]

Accordingly, by setting the gap C1 to 15% or less and setting the shear angle β1 ° within the range of 10 ° to 20 °, a high-quality slit processing without generation of whiskers can be achieved. The effect of being efficiently performed was obtained.

The cutting edge angles α1 ° and α2 ° are in the range of 15 ° to 40 ° or 85 ° to 90 °, but are preferably in the range of 25 ° to 35 ° or 87.5 ° to 90 °. Yes, and more preferably a value of 30 ° or 90 °.

In the photothermographic material web 12, the thickness of the image forming layer 12b is 3 μm or more and 50 μm or more.
m or less, preferably 12 μm or more and 40 μm or less,
More preferably, it is 15 μm or more and 35 μm or less.

In the present embodiment, the photothermographic material web 12 has been described as an image forming sheet, but the invention is not limited to this. It is also possible to apply.

[0047]

According to the apparatus for cutting an image forming sheet according to the present invention, a first apparatus for cutting an image forming sheet is provided.
And a second blade member, wherein the cutting edge angle, shear angle and the gap between the first and second cutting edges are set within predetermined ranges, thereby preventing defects during cutting as much as possible to achieve high quality cutting. Is reliably performed with a simple configuration.

Further, according to the present invention, there are provided first and second rotary blade members for slitting the image forming sheet member, and the blade edge angle, shear angle and the gap between the first and second blade edges are within predetermined ranges. With this setting, defects at the time of slitting can be prevented as much as possible, and the image forming sheet can be slit with high quality and efficiency, and the configuration can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a schematic configuration of a processing system into which a cutting device according to an embodiment of the present invention is incorporated.

FIG. 2 is an explanatory side view of a slitter device incorporated in the processing system.

FIG. 3 is a front view of the slitter device.

FIG. 4 is an explanatory diagram of a first blade member constituting the slitter device.

FIG. 5 is a perspective view of a main part of a cross cutter device incorporated in the processing system.

FIG. 6 is an explanatory side view of the cross cutter device.

FIG. 7 is an explanatory view showing another configuration of the cross cutter device.

FIG. 8 is an explanatory diagram showing a range of a blade angle, a shear angle, and a gap in the cross cutter device.

FIG. 9 is an explanatory diagram showing a range of a blade edge angle, a shear angle, and a gap in the slitter device.

FIG. 10 is a perspective view illustrating a defect at the time of cutting.

FIG. 11 is a perspective view illustrating a defect during slit processing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Processing system 12 ... Photothermographic material web 12a ... Base layer 12b ... Image forming layer 14 ... Web sending part 16 ... Slitter device 18 ... Cross cutter device 20 ... Sheet body 22 ... Stacking part 24, 26 ... Rotating blade member 28 , 32, 44, 50 ... cutting edge 30, 34, 46,
52: cutting edge line 38, 48 ... chamfered part 40, 40a, 4
2, 42a ... blade member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 27/32 G03B 27/32 B G03D 15/04 G03D 15/04 A

Claims (2)

[Claims] 1. An image forming sheet body comprising first and second blade members arranged to sandwich the image forming sheet body, wherein the first and second blade members contact the image forming layer side of the image forming sheet body. The first blade member has a cutting edge angle formed by a reference imaginary line orthogonal to a surface direction of the image forming layer and a cutting edge line including a first cutting edge of the first blade member that first contacts the image forming layer. Is set in the range of 15 ° to 40 °, or 85 ° to 90 °, and the first cutting edge of the first blade member and the image forming layer of the image forming sheet opposite to the image forming layer. The shear angle between the image forming sheet member and the second cutting edge of the second blade member that first contacts the surface of the second member is set within a range of 0.3 ° to 5 °, and intersects the cutting direction. The gap between the first cutting edge and the second cutting edge in the direction of 15% of the thickness of the formed sheet material
An image forming sheet cutting apparatus characterized in that the following values are set. 2. An image forming sheet body comprising: first and second rotary blade members arranged to sandwich an image forming sheet body for slitting the image forming sheet body; and an image forming layer side of the image forming sheet body. The first rotary blade member contacting the image forming layer, a reference imaginary line orthogonal to the surface direction of the image forming layer, and a cutting edge line including a first cutting edge of the first rotary blade member first contacting the image forming layer; The cutting edge angle
The angle is set in the range of 15 ° to 40 ° or 85 ° to 90 °, and the first cutting edge of the first rotary blade member and the image forming layer of the image forming sheet body on the opposite side. A shear angle between the image forming sheet member and the second cutting edge of the second rotary blade member that first contacts the surface is set within a range of 10 ° to 20 °, and a direction intersecting the slit direction The first cutting edge and the second
The gap with the blade edge is 15 times the thickness of the image forming sheet body.
%, Which is set to a value of not more than%.