JPH08300601A - Data recording method onto heat-sensitive stencil paper and device thereof - Google Patents

Abstract

PURPOSE: To realize the forming of perfectly independent holes by a method wherein heat treatment is applied with a first row heating part to the boundary portion between parts to be opened within the temperature range, within which no hole is formed in stencil paper, and then the part to be opened is opened with a second row heating part. CONSTITUTION: A sub-heater HS1 comes into contact with the position, which is apart from part to be opened toward upstream side in sub-scanning direction, on raw paper 7 nearly simultaneously with a main heater HM so as to form a heat-treated part, which does not turn to be opened. The heat-treated part locates at the boundary portion of the part to be opened, which is opened with the main heater HM afterwards and is adjacent to the heat-treated part in the sub-scanning direction. The heat-treated part plays a role as the stopper against the enlargement of a hole in the sub-scanning direction. In succession, when the raw paper 7 is moved by the pitch of heating repeat, both the main heater HM and the sub-heater HS1 generate heat again. At this time, though the part to be opened adjacent to the heat-treated part is melted and holed with the main heater HM, the hole part is prevented due to the heat-treated part from enlarging in the sub-scanning direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recording data by heat-opening a heat-sensitive stencil sheet with a dot-shaped heat generating portion, and an apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, as a data recording device for a heat-sensitive plate making apparatus, a thermal head having a plurality of dot-shaped heat generating portions arranged at predetermined intervals in the main scanning direction and a platen roller facing the heat generating portion have been provided. , Only biaxially stretched thermoplastic resin film made of polyester resin, for example,
Alternatively, a heat-sensitive stencil sheet (hereinafter referred to as "base sheet") composed of a non-woven fabric or a porous support such as Japanese paper bonded to the above film is pressed against the heating portion by the platen roller, and the base sheet is set in the main scanning direction. It is known that data is recorded by heating and opening the film by selectively heating the heating portion while moving in the sub-scanning direction orthogonal to each other.

When data is recorded by heating and opening holes in the base paper, if the holes formed in the base paper are large, the dot diameter of the ink adhering to the printing paper through these holes becomes large, and these dots are connected. This leads to deterioration of image quality. Therefore, it is desirable that the holes formed in the base paper have the optimum diameter and are independent of each other.

By the way, generally, in the process of manufacturing a thermoplastic resin film, heat treatment is applied at the end of the stretching process. This heat treatment is performed in order to remove the heat shrinkage force from the film, which causes strain after being stretched,
Regarding the film used for the above-mentioned base paper, there are many films in which the heat shrinkage force is left to some extent by adjusting the heat treatment time and the heating amount thereof (Japanese Patent Publication No. 6-45267).
(See the official gazette). This is because the internal stress is left so that the portion melted by the heat generated by the heat generating portion is quickly opened. On the other hand, if the residual heat shrinkage force is too strong, the holes formed in the film expand and connect to the adjacent holes, which causes the above inconvenience.

[0005]

In order to deal with the above inconvenience, conventionally, the heat shrinkage rate of the film is delicately set to suppress the hole expansion, and the size of the heat generating portion of the thermal head is further increased. It has been attempted to make the openings small by making them fine and prevent the holes from continuing. However, the setting of the heat shrinkage ratio for suppressing the expansion of holes sacrifices the perforation sensitivity of the film, that is, the ease of opening, and there is a problem that the opening ratio is lowered. In addition, if the heating portion is made finer,
There is a problem that the thermal efficiency of the thermal head is reduced and the aperture ratio is also reduced, and the heat is concentrated on the heat generating portion, so that the life of the thermal head is shortened.

Therefore, the present invention has been made to solve the above-mentioned problems, and is completely independent of the heat-sensitive stencil sheet with a simple structure without lowering the perforation sensitivity of the film or shortening the life of the thermal head. It is an object of the present invention to provide a data recording method for a heat-sensitive stencil sheet and an apparatus therefor capable of forming the apertures.

[0007]

According to the observation of the present inventors, as shown in FIG. 7, the continuity of the openings formed in the film mainly occurs in the sub-scanning direction, that is, the moving direction of the base paper. It's known. The reason for this is clarified in Japanese Patent Application No. 5-116962 by the present applicant. However, even after the power supply to the heat-generating part of the thermal head is stopped, the heat-generating part remains at a temperature higher than the film melting point for a while. This is caused by the fact that an opening longer than the length of the heat generating portion is formed in the sub-scanning direction due to the movement of the base paper, and the opening is formed in the next opening area.
Therefore, in order to prevent continuous holes in the sub-scanning direction and form completely independent openings, it is important to suppress the expansion of the holes in the sub-scanning direction.

Therefore, the inventors of the present invention have made extensive studies as to how to suppress the enlargement of holes in the sub-scanning direction, and have found the following two points. Firstly, when a part of the film of the base paper is preheated below the melting temperature, the part is heat-treated and highly crystallized to reduce the heat shrinkage force, which makes it difficult to perforate even when heated in the heat generating part. Become. Therefore, if the boundary portion between the openings adjacent to each other in the sub-scanning direction is preheated at a temperature not higher than the melting temperature, the crystallinity of the film in that portion is increased, and it functions as a hole expansion stopper. Secondly, if an aperture of an appropriate size is to be obtained by heating once by the heat generating portion, the aperture will be expanded in the sub-scanning direction and the holes will be continuous. Therefore, by using two heat generating portions to perform the opening in the film and the enlargement / shaping of the opening in stages, it is possible to obtain an independent opening having an optimum size.

The present invention has been made on the basis of the above-mentioned findings. In the method for recording data on a heat-sensitive stencil sheet of the first invention, a plurality of dot-shaped heat generating portions are arranged in two rows along the main scanning direction,
The heat-sensitive stencil sheet is moved in the sub-scanning direction while being in contact with these heat-generating portions, and the first row of heat-generating portions on the upstream side in the sub-scanning direction opens the perforated portions adjacent to each other in the sub-scanning direction on the raw paper. A heat treatment is applied to a boundary portion between the heat treatment portion and a hole portion in a temperature range in which the base paper is not opened, and a hole portion adjacent to the heat treatment portion is opened by the second row heat generating portion. In the data recording method, the heating repetition pitch of the base paper is set to P,
First row heating unit and the S ₁ between the centers pitch of the heat generating portion of the second column of the integer is n, is realized by a data recording apparatus that satisfies the relation _{S 1 = P (n + 0.5} ).

Further, in the method for recording data on the heat-sensitive stencil sheet according to the second aspect of the invention, a plurality of dot-shaped heat generating parts are arranged in two rows along the main scanning direction, and the heat-sensitive stencil is contacted with these heat generating parts in the sub-scanning direction. The base paper is moved to open the base paper by the first row of heat generating parts on the upstream side in the sub-scanning direction, and the second row of heat generating parts reheats and shapes the openings. further,
In the data recording method of the second aspect of the invention, when the heating repetition pitch of the base paper is P, the center-to-center pitch of the heat generating portions in the first row and the heat generating portions in the second row is S ₂ , and the integer is n, S ₂ = It is realized by a data recording device that satisfies the relationship of nP.

The data recording apparatus for heat-sensitive stencil sheet according to the third aspect of the invention has the features of each data recording apparatus according to the first aspect and the second aspect of the invention, and a plurality of them are arranged along the main scanning direction. Data is recorded on the heat-sensitive stencil sheet by arranging dot-shaped heat-generating portions and moving the heat-sensitive stencil sheet in the sub-scanning direction while contacting these heat-generating portions to selectively heat the heat-generating portion to open the heat-sensitive stencil sheet. In the apparatus, the heat generating parts are arranged in three rows, and a temperature at which the base paper does not open at the boundary between the open holes adjacent to each other in the sub-scanning direction on the base paper. The heat generating portion in the first row on the upstream side in the sub-scanning direction for performing heat treatment in the range, the heat generating portion in the second row for opening a hole to be opened adjacent to the heat treatment portion after the heat treatment, and reheating the aperture. And a third row of heating elements to be shaped
The heating repetition pitch of the base paper is P, the center-to-center pitch between the first row heat generating portion and the second row heat generating portion is S ₁ , and the center center pitch between the second row heat generating portion and the third row heat generating portion is S _2. , Where N is an integer, S ₁ = P (n + 0.5) and S ₂ = nP are satisfied.

Here, the base paper includes both a stretched thermoplastic resin film made of, for example, a polyester resin, or a film obtained by laminating a porous support such as nonwoven fabric or Japanese paper to the film. The heat treatment and the opening of the base paper according to the present invention are performed on the film. Further, the heating repeat pitch of the base paper,
The center-to-center pitch of two adjacent holes when independent holes are continuously formed in the sub-scanning direction. Further, the integer n is preferably 1 or 2. In addition,
The movement of the base paper with respect to the heat generating portions in each row may be continuous movement or intermittent movement.

[0013]

According to the first aspect of the invention, the plurality of dot-shaped heat generating portions are arranged in two rows in the main scanning direction, and the first row of heat generating sections and the second row of heat generating sections are images to be plate-made on the base paper. Generates heat selectively according to the data. However, the temperature at the time of heat generation of the first row heat generating portion on the upstream side in the sub-scanning direction is set to a range that does not reach the opening of the base paper, whereas the second row heat generating portion has the above temperature. A melting temperature above which the base paper can be opened is reached. The base paper moves in the sub-scanning direction while being in contact with the heating portions in each row. At this time, the heat generating portions in the first row generate heat by coming into contact with the boundary portion between the opened hole portions adjacent to each other in the sub-scanning direction on the base paper. This is because the heating repetition pitch P of the base paper and the center pitch S ₁ of the heat generating portions in the first row and the second row are S ₁ = 1.5P when n is 1. This is because the heat generating portions in each row are arranged so as to satisfy the above condition. The heat-treated portion which is heat-treated by contacting the heat-generating portion in the first row has higher crystallinity of the film, which reduces the heat shrinkage force and lowers the perforation sensitivity. The heat generating portion of the second row is opened by contacting the hole portion adjacent to the heat treatment portion. However, due to excessive heating or heat shrinkage force, the hole may expand in the sub-scanning direction. However, the presence of the above-mentioned heat treatment section holds it down. Therefore, the holes are not continuous in the sub-scanning direction, and completely independent holes are formed in the base paper.

Similarly, in the second invention, a plurality of dot-shaped heat generating portions are arranged in two rows in the main scanning direction, but the temperature at which heat is generated is opposite to that in the first invention and is on the upstream side in the sub scanning direction. The heating temperature of the first row is set to a temperature above the melting temperature at which the base paper can be opened, and the heating section of the second row is not opened. Further, the center-to-center pitch S ₂ between the heat generating portions in the first row and the heat generating portions in the second row is set equal to the heating repetition pitch P of the base paper when n is 1, and the relationship S ₂ = P is established. Meet The stencil sheet that has moved in the sub-scanning direction is opened by making contact with the heat generating portions in the first row, but the size of this opening may be formed in an optimum size that is not continuous with the adjacent openings. , May be formed smaller than that.
Subsequently, the apertures come into contact with the second row of heat generating portions and are reheated as the base paper moves. Here, when the opening is formed smaller than the optimum size, the opening edge is radiated by internal stress remaining around the opening because the opening edge portion is softened by reheating even before melting. Shaped by spreading in the direction. The second opening extends to the edge of the second opening.
As the heating effect of the heating portion of the row becomes smaller, the temperature at the edge of the aperture drops and hardens again, and the enlargement of the aperture stops in balance with the internal stress of the surroundings. As a result, the aperture is shaped into an optimum size that does not continue in the sub-scanning direction with other apertures, and the aperture ratio is increased. In addition, the lengths of the individual heat generating portions in the second row and the heat generation amounts thereof are set within a range that does not further expand the holes that are already formed in the first row of the heat generating portions to have optimum sizes. Is preferred.

In the third invention, the holes are formed in the base paper by the process combining the first invention and the second invention. That is, the plurality of dot-shaped heat generating portions are arranged in three rows in the main scanning direction, and the heat generating portions in the first row on the upstream side in the sub scanning direction heat-treat the boundary portion between the apertured portions and the second row. The heat-generating part of 1 is opened, and the heat-generating part of the third row enlarges and shapes the hole. Therefore, according to the present invention, the opening which is completely independent in the sub-scanning direction and has the optimum size is formed more reliably.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the first invention will be described with reference to the accompanying drawings. FIG. 1 is a partially enlarged plan view of a thermal head which is a recording device for fusing and opening holes in a heat-sensitive stencil sheet in a heat-sensitive plate making apparatus. In the thermal head 1, main heaters H _M, which are dot-shaped main heat generating portions, are arranged at a predetermined pitch P along the main scanning direction. The sub-heater H _S1 which is a dot-shaped sub-heating portion is arranged on the upstream side of the main heater H _{M in} the sub-scanning direction orthogonal to the main scanning direction, and
The main heaters H _M are arranged at the same pitch P along the main scanning direction.

The sub-heater H _S1 has a width W in the main scanning direction.
Is the same as the main heater H _M, and the length L _S1 in the sub-scanning direction is shorter than the length L _M of the main heater H _M. Also,
Pitch S between the centers of the main heater H _M and the sub heater H _S1
1 is S ₁ = P (n + 0.5), where P is the same as the main heater H _M pitch in the main scanning direction, and n is an integer, the heating repeat pitch of the base paper by each heater H _M , H _S1 . They are arranged so as to satisfy the relationship, and FIG. 1 shows a case where n is 1, that is, S ₁ = 1.5P. Here, as a specific example of each of the above dimensions, the pitch P of the main heater H _M and the sub heater H _{S1 in} the main scanning direction is 6
3.5 [mu] m, the pitch between centers S ₁ of the main heater H _M and the sub heater H _S1 95.25μm, main heater H _M and 30μm width W in the main scanning direction of the sub-heater H _S1, in the sub-scanning direction of the main heater H _M Length L _M is 40 μm, sub heater H
_It is appropriate that the length L _S1 of _{S1 in} the sub-scanning direction is 10 μm.

FIG. 2 is an enlarged sectional view of the thermal head 1 in the sub-scanning direction. On the non-conductive substrate 2, a heating resistor layer 3 of a predetermined length made of thin film metal, an electrode layer 4 made of aluminum, The protective film layer 5 is sequentially laminated, a part of the electrode layer 4 is removed by etching to form the main heater H _M and the sub-heater H _S1, and the electrodes 41, 42, 43 of the electrode layer 4 are formed. Of these, the electrode 41 is connected to a power source, and the electrode 43 is connected to a driver (not shown).
The platen roller 6 is brought into contact with the thermal head 1.
Are rotatably arranged in the direction of arrow a, and the base paper 7 is passed through the outer peripheral surface of the platen roller 6 along the sub-scanning direction. The base paper 7 comprises a thermoplastic resin film 71 located on the thermal head 1 side and a porous fiber sheet 72 located on the platen roller 6 side. The film 71 and the fiber sheet 72 are integrally formed with an adhesive or the like. It is attached.

A plate making operation of the thermal plate making apparatus having the thermal head 1 having the above-mentioned structure will be described. The main heater H _M and the sub-heater H _S1 is current selectively heated is energized in accordance with image data to be plate-making base paper 7, but as shown in the graph of FIG. 1, the heat producing temperature T of the main heater H _{M 1} reaches the melting temperature T ₀ or higher of the film 71, whereas the heat generation temperature T ₂ of the sub-heater H _S1 is set to the melting temperature T ₀ or lower, which is a temperature range in which the base paper 7 does not open.

The base paper 7 moves in the sub-scanning direction as the platen roller 6 rotates while coming into contact with the thermal head 1, and as shown in FIG.
_The perforated portion 73 of the base paper 7 that is in contact with _M is melted and perforated.
At this time, as shown in FIG. 3A, the sub-heater H _S1 which is heated to the temperature T ₂ almost at the same time as the main heater H _M has a center-to-center distance S from the hole portion 73 to the upstream side in the sub-scanning direction. ₁
A heat treatment portion 74 that does not reach the opening is formed by contacting a position on the base paper that is separated by = 1.5P. As shown in FIG. 3 (c), this heat treatment unit 74 will be installed in the main heater H later.
It is located at the boundary between the holes to be opened 75 and 77 that are adjacent to each other in the sub-scanning direction and that are opened by _M. Further, since the film is highly crystallized by the heat treatment and the heat shrinkage force is reduced and the perforation sensitivity is lowered, the heat treatment section 74 serves as an aperture expansion stopper in the sub-scanning direction.

Subsequently, when the base paper 7 moves in the sub-scanning direction by the heating repetition pitch P, the main heater H _M and the sub heater H _S1 generate heat again. At this time, FIG.
As shown in, the heat treatment section 7 by the main heater H _M
The hole portion 75 adjacent to No. 4 is melt-opened, but the heat treatment portion 74 prevents the hole portion 75 from expanding upstream in the sub-scanning direction. Further, at the same time as the opening of the hole portion 75, the heat treatment portion 76 is formed by the sub heater H _S1 . After that, similarly, when the base paper 7 moves by the heating repetition pitch P, the opened hole portion 77 and the heat treatment portion 78 shown in FIG. 3C are formed. The hole portion 77 is prevented from expanding downstream in the sub-scanning direction by the heat treatment portion 74 and is not continuous with the hole portion 75.
As described above, the presence of the heat treatment portion can prevent continuity between the opened holes adjacent to each other in the sub-scanning direction. Therefore, as shown in FIG. 4, when the opened holes are formed in a matrix on the base paper. Also, it is possible to obtain completely independent openings.

Next, an embodiment of the second aspect of the invention will be described with reference to FIG. Similarly, in the thermal head 20 of the present embodiment, a plurality of dot-shaped heat generating portions are arranged in two rows in the main scanning direction. Contrary to the above embodiment, heat generation in the first row on the upstream side in the sub-scanning direction. Is the main heater H
_The sub-heater H _S2 is the second row of heat-generating portions on the downstream side of _M , and the center-to-center pitch S ₂ of these heater rows is set equal to the heating repetition pitch P of the base paper. Also,
As shown in the graph of FIG. 5, the heat generation temperature T ₁ of the main heater H _M is set to the melting temperature T ₀ or higher of the base paper film 71, and the heat generation temperature T ₂ of the sub heater H _S2 is set to the melting temperature T ₀ or lower. ing.

The thermal head 20 is melted and opened when the hole to be opened in the base paper 7 reaches the contact position with the main heater H _M. It is preferable that the size of this opening is formed to an optimum size that is not continuous with the adjacent opening in the sub-scanning direction, but the temperature drop of the main heater H _M and the fibers on the rear surface of the hole to be opened. There is a case where a sufficiently large opening cannot be obtained due to heat being taken away due to the fact that it is dense or is in a lump state. In this case, since the edge portion of the opening is reheated by the sub-heater H _S2 and is softened even if it is not melted, the opening is enlarged and shaped into an optimum size based on the internal stress remaining around the opening. Therefore, the aperture ratio can be improved. It should be noted that the sub-heater H _S2 does not further expand the opening already formed in the main heater H _M to have an optimum size.

The thermal head 30 of the third invention is a combination of the thermal heads 1 and 20 described above. That is, as shown in FIG. 6, in this thermal head 30, a plurality of dot-shaped heat generating portions are arranged in three rows in the main scanning direction, and the first sub heater H _S1 and the main heater H are arranged from the upstream side in the sub scanning direction. _M and a second sub-heater H _S2 .
Further, the center-to-center pitch of each heater array is set to S ₁ (= 1.5P) and S ₂ (= P), respectively, as in the above embodiment. In the thermal head 30 having the above configuration,
The first sub-heater H _S1 forms a heat treatment part at the boundary between the holes, the main heater H _M opens the holes, and the second sub-heater H _S2 enlarges and shapes the holes. To do.

[0025]

As is apparent from the above description, according to the method and apparatus for recording data on the heat-sensitive stencil sheet of the first aspect of the invention, between the perforated portions which are adjacent to each other in the sub-scanning direction on the sheet. Since the heat treatment portion serving as a hole expansion stopper is formed by the heat generating portion (sub-heater) in the first row at the boundary portion, the opening formed by the heat generating portion (main heater) in the second row is formed in the sub-scanning direction. It is possible to prevent the expansion of the openings, and to form completely independent openings.

Further, according to the data recording method and the apparatus thereof of the second invention, after the heat is generated in the first row of the heating section (main heater), the second row of the heating section (sub-heater) is reheated and opened. Since the holes are enlarged and shaped, it is possible to form independent and optimally sized openings. Furthermore, since the aperture ratio can be increased by the heat generating portions in the second row, there is no problem even if the aperture ratio by the heat generating portions in the first row is low. Therefore, it becomes possible to miniaturize each dot-shaped heat generating portion of the first row into a size sufficient for making the openings independent of each other, and at the same time, the opening of the optimum size can be formed by heating twice. Since it is obtained, the current applied to the heat generating portion can be suppressed as low as possible and the durability life of these can be extended.

Further, according to the data recording apparatus of the third aspect of the invention, the data recording apparatus of the first aspect and the second aspect of the invention are combined, and the heat generating portion (first sub-heater) in the first row is the hole to be opened. Heat treatment is performed between them, the second heating element (main heater) opens the holes, and the third heating element (second sub-heater) expands and shapes the openings, so each is completely independent. It is possible to more reliably form the opening having the optimum size.

[Brief description of drawings]

FIG. 1 is an enlarged plan view and temperature distribution diagram of a thermal head.

FIG. 2 is an enlarged cross-sectional view of the thermal head and base paper of FIG.

FIG. 3 is a diagram for explaining the process of opening and heat treatment by the thermal head of FIG.

FIG. 4 is a partially enlarged view of a raw paper sheet opened by the thermal head of FIG.

FIG. 5 is an enlarged plan view and temperature distribution diagram of another thermal head.

FIG. 6 is an enlarged plan view and temperature distribution diagram of a thermal head in which the thermal heads of FIGS. 1 and 5 are combined.

FIG. 7 is a plan view showing a continuous state of openings in a base paper punched by a conventional thermal head.

[Explanation of symbols]

1 ... Thermal head, 6 ... Platen roller, 7 ... Base paper,
73, 75, 77 ... Holes to be opened, 74, 76, 78 ... Heat treatment part, H _M ... Main heater, H _S1 , H _S2 ... Sub heater.

Claims (5)

[Claims] 1. A plurality of dot-shaped heat generating portions are arranged in two rows along the main scanning direction, the heat-sensitive stencil sheet is moved in the sub-scanning direction while being in contact with these heat generating portions, and the first row of heat generating portions causes the above-mentioned base paper. A heat treatment is applied to a boundary portion between the opened holes adjacent to each other in the sub-scanning direction in a temperature range in which the base paper does not open, and the heat generating portions in the second row apply heat treatment to the heat treating portions. A method for recording data on a heat-sensitive stencil sheet that opens adjacent holes. 2. A plurality of dot-shaped heat generating parts are arranged in two rows along the main scanning direction, and the heat-sensitive stencil sheet is moved in the sub-scanning direction while being in contact with these heat generating parts. A method for recording data on a heat-sensitive stencil sheet, in which the holes are opened, and the holes are reheated by the second heating portion to be shaped. 3. A plurality of dot-shaped heat generating portions are arranged along the main scanning direction, and the heat-sensitive stencil sheet is moved in the sub-scanning direction while being in contact with these heat generating portions to selectively heat the heat generating portions. In a data recording device for heat-sensitive stencil sheet for opening a stencil sheet, the heat generating portions are arranged in two rows, and a hole portion and a hole portion which are adjacent to each other in the sub-scanning direction on the sheet paper are formed. At the boundary between the first and second heating elements, heat treatment is performed in a temperature range in which the base paper does not open, and after the heat treatment, a second heating element that opens a hole to be opened adjacent to the heat treatment area. Where P is the heating repetition pitch of the base paper, S ₁ is the center-to-center pitch of the heat generating portions in the first row and the heat generating portions in the second row, and n is an integer, S ₁ = P (n + 0.5 ) A data recording device for a heat-sensitive stencil sheet, which satisfies the relationship of 4. A plurality of dot-shaped heat generating portions are arranged along the main scanning direction, and the heat-sensitive stencil sheet is moved in the sub-scanning direction while being in contact with these heat generating portions to selectively heat the heat generating portions. In a data recording device for heat-sensitive stencil sheet for opening a stencil sheet, the heat generating portions are arranged in two rows, and the heat generating portions in the first row for piercing the sheet material and the holes are reheated for shaping. When the heating repetition pitch of the base paper is P, the center-to-center pitch of the heating elements of the first row and the heating elements of the second row is S ₂ , and the integer is n, An apparatus for recording data on a heat-sensitive stencil sheet, which satisfies the relationship of S ₂ = nP. 5. A plurality of dot-shaped heat generating parts are arranged along the main scanning direction, and the heat-sensitive stencil sheet is moved in the sub-scanning direction while being in contact with these heat generating parts to selectively heat the heat generating parts. In a data recording device for a heat-sensitive stencil sheet for opening a stencil sheet, the heat generating portions are arranged in three rows, and the opened portion and the opened portion which are adjacent to each other in the sub-scanning direction on the raw sheet are arranged. At the boundary between the first and second heating elements, heat treatment is performed in a temperature range in which the base paper does not open, and after the heat treatment, a second heating element that opens a hole to be opened adjacent to the heat treatment area. A heating repeating pitch of the base paper is P, a center-to-center pitch of the heating elements of the first row and the heating elements of the second row is S. _1, a heat generating portion of the second column a pitch between centers of the heat generating portion of the third column and S _2, an integer and n To _{come, S 1 = P (n +} 0.5), the data recording device for the heat-sensitive stencil sheet, characterized by satisfying the relation of S ₂ = nP.