JP6928944B2 - Manufacturing method of forensic assistance sheet - Google Patents

Description

The present invention relates to a method for manufacturing a forensic aid sheet for a criminal investigation for carrying a forensic object such as evidence of a criminal investigation.

In the current criminal investigation, scientific investigation such as DNA test is often carried out. In DNA testing, foreign substances are not allowed to be mixed in the test object.
Therefore, consideration is given to the prevention of contamination even in the forensic assistance sheet on which the forensic object is placed.
For example, the forensic assistance sheet of Patent Document 1 is configured as shown in FIGS. 5 and 6.
One resin sheet main body 1 is folded in half by a fold line 2 at a position deviated from the center in the width direction to separate the upper sheet 1a and the lower sheet 1b. Then, the width dimension of the lower sheet 1b in the direction orthogonal to the fold line 2 is made larger than the width dimension of the upper sheet 1a in the direction orthogonal to the fold line 2. Therefore, when the upper and lower sheets 1a and 1b are folded back from the folding line 2 and the upper and lower sheets 1a and 1b are brought into close contact with each other, the edge portion of the lower sheet 1b is exposed as shown in FIG. , This portion is referred to as an exposed portion 1c.

Then, with the upper sheet 1a and the lower sheet 1b in close contact with each other, the exposed portion 1c is printed with a length scale 3 continuous in the longitudinal direction thereof.
Since the length scales 3 are continuously printed on the exposed portion 1c while keeping the upper and lower sheets 1a and 1b in close contact with each other as described above, the upper and lower sheets 1a and 1b are printed at the time of printing. The contact surface is not exposed. Therefore, foreign matter or the like generated during printing does not adhere to the close contact surfaces of the upper and lower sheets 1a and 1b.

In this way, the sheet body 1 on which the length scale 3 is printed in a state where the upper sheet 1a and the lower sheet 1b are in close contact with each other is wound in a roll shape and stored in the above-mentioned close contact state.
Further, the sheet body 1 is formed with perforations 4 which are kept at predetermined intervals in the longitudinal direction thereof. The perforation 4 crosses the sheet body 1 in a direction orthogonal to the folding line 2. With the perforation 4, the upper sheet 1a and the lower sheet 1b can be easily cut in close contact with each other.
Therefore, the sheet main body 1 which is wound and stored in a roll shape with the upper and lower sheets 1a and 1b in close contact with each other can be pulled out from the roll at the time of use and cut at the perforation 4 to be used.

Japanese Unexamined Patent Publication No. 2014-144573

As described above, in the conventional forensic assistance sheet, the sheet body 1 is folded in half, the upper and lower sheets 1a and 1b are stored in close contact with each other, and the sheet is unfolded at the perforation 4 when used. It is designed to prevent foreign matter from adhering to the contact surface. Therefore, the upper and lower sheets 1a and 1b are kept in close contact with each other during storage and cutting, and foreign matter can be prevented from entering the close contact surface from the outside.
However, the conventional forensic assistance sheet includes a step of folding the unfolded sheet body 1 in half in its manufacture. Then, foreign matter may adhere to the unfolded sheet body 1, and as a result, foreign matter may be mixed into the close contact surface when folded in half.

In order to prevent such foreign matter from being mixed in, it is conceivable to increase the cleanliness of the manufacturing process, but this will increase the manufacturing cost.
If a foreign substance is mixed in the close contact surface, the foreign substance may adhere to the object to be identified on the contact surface, and cannot be used for forensic investigations such as DNA analysis.
An object of the present invention is to provide a method for manufacturing a forensic assistance sheet that can easily and completely prevent foreign matter from entering the contact surface of a sheet body that has been folded in half.

The first invention is a step of crushing a resin tube flat to bring the inner peripheral surfaces into close contact with each other, and creases are made at both ends of the maximum width of the crushed tube, and the upper sheet is separated by the pair of creases. and a step of partitioning the lower sheet, as well as a portion folded one fold of said pair of folds, while maintaining the close contact between the upper sheet and the lower sheet, said one of said pair of folds forming a open end by cutting the fold side opposite to the folded portion, thereby exposing the lower sheet from the upper sheet at the open end side, of the lower sheet exposed from the upper sheet The exposed portion is provided with a step of printing a continuous length scale along the open end while maintaining the close contact state between the upper sheet and the lower sheet .

In the second invention, while maintaining the close contact state between the upper sheet and the lower sheet,
The process of cutting the crease on the opposite side of the folded part,
The open end is formed by a step of cutting only the upper sheet along a cut line located at a predetermined width from a crease on the side opposite to the folded portion.
The exposed portion is formed by a step of removing a piece between the crease on the side opposite to the folded portion formed by forming the open end and the cut line .

The third invention is a step of cutting only the upper sheet along a cut line at a position of a predetermined width from a crease on the side opposite to the folded portion while maintaining a close contact state between the upper sheet and the lower sheet. The exposed portion is formed by forming the open end, cutting the upper sheet, and then widening the crease on the side opposite to the folded portion .

According to this invention, the seat body is formed from a tube, in the manufacturing process, the contact surface between the upper sheet and the lower sheet is not exposed is expanded. Therefore, it is possible to prevent foreign matter from being mixed into the close contact surface in a process such as printing.
As described above, since the mixing of foreign substances can be completely prevented only by forming the sheet body from the tube, it is possible to realize an identification auxiliary sheet that can be used for collecting data for DNA analysis without particularly increasing the manufacturing cost.

It is a perspective view of the tube before forming the seat body of 1st Embodiment. It is a top view of the state before unfolding the sheet body of an embodiment. It is a top view of the sheet body of the embodiment in an unfolded state. It is a perspective view of the tube of 2nd Embodiment. It is a top view of the conventional seat body in an unfolded state. It is a perspective view of the conventional seat body folded in half.

Figures 1 to 3 show the forensic assistance sheet of the first embodiment of the present invention.
The most characteristic feature of the identification assist sheet of the first embodiment is that the sheet body 5 constituting the sheet body 5 is formed of a resin tube, as will be described later.
Then, the sheet body 5 is rolled and stored in a state where the upper sheet 5a and the lower sheet 5b partitioned by the crease 6 are in close contact with each other.
Further, the width W1 of the lower sheet 5b is made longer than the width W2 of the upper sheet 5a by the width W3, and a part of the lower sheet 5b is exposed as an exposed portion 5c of the width W3 from the upper sheet 5a. A continuous length scale 8 is printed along the edge 7a on the exposed portion 5c.
Reference numeral 9a in FIG. 1 is an edge of the upper sheet 5a.

The method of using such a forensic aid sheet is the same as that of the conventional forensic aid sheet shown in FIGS. 5 and 6.
However, the seat body 5 of the first embodiment is formed from a tube as described above.
FIG. 2 is a perspective view showing a state in which the tube is flatly crushed, and creases 6 and 7 are formed at both ends in the width direction. The tube is divided into an upper sheet 5a and a lower sheet 5b with the pair of folds 6 and 7 as boundaries, and one fold 6 serves as a folding portion of the present invention.

The tube is formed by an inflation method using a ring die or the like, and is crushed by a pinch roll or the like immediately after film formation, and as shown in FIG. 2, the upper sheet 5a, which is the inner peripheral surface of the tube, One surface of each of the lower sheets 5b is in close contact with each other.
Further, the sheet body 5 used in the first embodiment is a multilayer film having easiness of tearing in the direction of arrow A, which is the extrusion direction, and the direction of arrow B, which is orthogonal to the direction of arrow A. Examples of such a film include Kirepoli (registered trademark) manufactured by Japan Polyethylene Corporation.
Further, the inner peripheral surface of the tube is composed of a resin layer which is a low reflection surface having low light reflectance.

Then, in the tube in which the inner peripheral surfaces shown in FIG. 2 are in close contact with each other, the other crease 7 is cut to separate one end of the upper sheet 5a and the lower sheet 5b in the width direction, and the crease 7 to the width W3. Only the upper sheet 5a is cut along the cut line 9 indicated by the alternate long and short dash line located at the location. Then, if the piece of the upper sheet 5a having the width W3 is removed, the exposed portion 5c appears.

It does not matter which of the crease 7 and the cut line 9 is cut first, but these cuts are the cuts on the crease side opposite to the folded portion of the present invention, and this cutting work is performed with the upper sheet 5a. This is performed while maintaining the state of close contact with the lower sheet 5b. The cut line 9 in FIG. 2 only indicates the position to be cut, and does not particularly form a perforation or a slit.
Further, the position of the crease 7 becomes the edge 7a of the lower sheet 5b shown in FIG. 1 after cutting, and the position of the cut line 9 becomes the edge 9a of the upper sheet 5a after cutting. The edges 7a and 9a form the open end of the present invention.
Further, while maintaining the above-mentioned close contact state between the upper sheet 5a and the lower sheet 5b, the length scale 8 is printed on the exposed portion 5c to complete the identification assist sheet of the first embodiment.

In the first embodiment, the upper sheet 5a and the lower sheet 5b of the sheet body 5 are not unfolded in the manufacturing process, and the close contact state is maintained. Therefore, in the manufacturing process, no foreign matter adheres to the close contact surface, and when the sheet body 5 is unfolded as shown in FIG. 3, no foreign matter adheres to the portion other than the exposed portion 5c.
Therefore, there is no foreign matter mixed in the object to be identified, which is placed on the developed sheet body 5 or wrapped in the sheet body 5, and accurate identification can be performed.
Further, in the first embodiment, since the sheet body 5 is composed of a multilayer resin sheet that is easily torn in the arrow B direction orthogonal to the longitudinal direction of the length scale 8, the sheet body 5 pulled out from the roll can be arbitrarily pulled out. Can be cut to length by hand.

Since the sheet body 5 can be easily cut by hand, no tools such as scissors or a cutter are required when pulling it out from the roll and cutting it.
Further, as in the conventional case, when the perforation or the like is provided in advance, the cut position is limited to the perforation position, but in this first embodiment, the cut position is not limited. Therefore, it can be used by cutting only the required length, and the seat body 5 is not pulled out more than necessary and wasted.

Further, in the process of forming the perforations, dust corresponding to the perforations is generated, so care must be taken so that the dust does not invade the contact surface. However, if there is no step of forming the perforation as in the first embodiment, the above-mentioned dust is not generated and there is no possibility that it adheres to the contact surface. In other words, it is easier and more complete to prevent foreign matter from entering.
When using this forensic assistance sheet, the sheet body 5 is unfolded as shown in FIG. At this time, in the upper sheet 5a and the lower sheet 5b, the range excluding the exposed portion 5c is the close contact surface from which foreign matter is prevented from being mixed, so that foreign matter may adhere to the object to be identified on the upper sheet 5a and the lower sheet 5b. No.

Furthermore, the contact surface side of the sheet body 5 is a low reflection surface. This close contact surface is the inner peripheral surface of the tube, and is the surface on which the length scale 8 is printed when the sheet body 5 is unfolded as shown in FIG. Therefore, the object to be identified is placed on the low reflection surface.
Therefore, the sheet body 5 does not shine too much when taking a picture of the object to be identified placed on the sheet body 5. In particular, if the reflected light of the sheet body 5 is strong during flash photography, the object to be identified becomes dark, and the surface shape and outline of the object to be identified are unclear. However, in this first embodiment, since the object to be identified is placed on the low reflection surface of the sheet body 5, the object to be identified can be clearly photographed. Therefore, the shape and size of the object to be identified can be clearly recognized from the photograph taken.

The second embodiment shown in FIG. 4 has a different cutting position of the tube forming the seat body 5, but the other configurations are the same as those of the first embodiment. The same reference numerals as those in FIGS. 1 and 2 are used for the same components as those in the first embodiment.
FIG. 4 is a perspective view of a resin tube having creases 6 and 7 at both ends in the width direction.

In this second embodiment, only the upper sheet 5a is cut along the cut line 9 at the position of the width W4 from the crease 7 to widen the crease 7. When the crease 7 is widened, the portion of the upper sheet 5a between the cut line 9 and the crease 7 expands outward from the width W1 as shown by the alternate long and short dash line to become an exposed portion 5c, which is one of the lower sheet 5b. Become a department. The exposed portion 5c is provided with an edge 9b corresponding to the cut line 9 and becomes a strip-shaped portion having a width twice the width W4.
The edge 9a and the edge 9b of the upper sheet 5a cut by the cut line 9 are the open ends of the present invention.

When the exposed portion 5c is formed in this way, a length scale (not shown) is printed on the exposed portion 5c. This length scale is the same as the length scale 8 of the first embodiment.
During this time, the upper sheet 5a and the lower sheet 5b partitioned by the crease 6 maintain a close contact state, and foreign matter does not enter the close contact surface.
Therefore, even in this second embodiment, even if the sheet body 5 is expanded and the object to be identified is placed or wrapped, no foreign matter adheres to the object to be identified, and accurate identification can be performed.
Moreover, since there is no conventional step of forming perforations, there is no possibility that sheet waste generated at the time of forming perforations adheres.

Further, as in the first embodiment, the sheet body 5 is easily torn in the direction of arrow A, which is the longitudinal direction of the length scale, and the direction of arrow B, which is orthogonal to the direction of arrow A. The length can be cut in the direction of arrow B.
Further, also in this second embodiment, since the surface on the side on which the length scale is printed is a low reflection surface, the object to be identified placed on the surface can be clearly photographed.
Further, in the second embodiment, the tube is only cut at the cut line 9, and there is no cut at the crease 7 as in the first embodiment. Therefore, it is necessary to widen the crease 7 to expose the exposed portion 5c.
On the other hand, unlike the first embodiment, it is not necessary to remove or discard a piece of the sheet.

In the first and second embodiments, the sheet body 5 is composed of a multilayer film that is easily torn in the longitudinal direction A of the length scale 8 (see FIGS. 1 to 3) and the direction B orthogonal to the longitudinal direction A. In order to cut 5 to the required length, it is sufficient that the film is easily torn only in the direction orthogonal to the length scale 8.
Further, the sheet body 5 may be cut with scissors or the like and used without being made of a multilayer film that is particularly easily torn.
If the sheet body 5 is formed from a tube and the upper sheet 5a and the lower sheet 5b are maintained in close contact with each other during the manufacturing process, foreign matter can be prevented from adhering to the close contact surface, and foreign matter can be prevented from adhering to the object to be identified. The purpose of preventing adhesion can be achieved.

Therefore, in order to prevent foreign matter from adhering to the object to be identified, it is essential that the inner peripheral surface of the tube, that is, the surface on the contact surface side between the upper sheet 5a and the lower sheet 5b, is a low reflection surface. No.
However, if the close contact surface is a low-reflection surface, it becomes easy to take a clear photograph as described above, and the value as a proof product of the photograph taken is increased.
Then, both sides of the sheet body 5 may be low reflection surfaces.

The present invention is most suitable for carrying an object to be tested during DNA testing.

5 Sheet body 5a Upper sheet 5b Lower sheet 5c Exposed part 6 (One) crease 7 (Other) crease 7a (Open end) Edge 8 Length scale 9 Cut lines 9a, 9b (Open end) Edge

Claims (3)

The process of crushing the resin tube flat to bring the inner peripheral surface into close contact,
A process of making creases at both ends of the maximum width of the crushed tube and separating the upper sheet and the lower sheet with the pair of creases as a boundary.
With the one of the folded portion folds of the pair of fold, while maintaining the close contact between the upper sheet and the lower sheet, cut crease side opposite to the folded portion of the pair of crease And the process of forming the open end
A step of exposing the lower sheet from the upper sheet on the open end side, and
A step of printing a continuous length scale along the open end while maintaining the close contact state between the upper sheet and the lower sheet on the exposed portion of the lower sheet exposed from the upper sheet.
A method of manufacturing a forensic aid sheet equipped with . While maintaining the close contact between the upper sheet and the lower sheet,
The process of cutting the crease on the opposite side of the folded part,
The open end is formed by a step of cutting only the upper sheet along a cut line located at a predetermined width from a crease on the side opposite to the folded portion.
The method for manufacturing a forensic aid sheet according to claim 1, wherein the exposed portion is formed by a step of removing a piece between the crease on the side opposite to the folded portion formed by forming the open end and the cut line. .. While maintaining the close contact between the upper sheet and the lower sheet,
The open end is formed by the step of cutting only the upper sheet along the cut line at a position of a predetermined width from the crease on the side opposite to the folded portion.
The method for manufacturing a forensic aid sheet according to claim 1, wherein the exposed portion is formed by a step of widening the crease on the side opposite to the folded portion after cutting the upper sheet .

Images