JP3208867U - Ruled line forming attachment for corrugated cardboard flexographic printing machine and corrugated sheet flexographic printing machine - Google Patents

Abstract

The present invention provides a ruled line forming attachment that can be processed with a corrugated cardboard flexographic printing machine. A ruled line forming attachment 1 according to the present invention is flexible and is provided on a sheet-like base material 6 that can be mounted on a plate cylinder of a corrugated cardboard flexographic printing machine, It comprises a ruled line blade 7 whose front end is pressed against the corrugated cardboard sheet, and an adhesive layer 8 that is flexible and is laminated on the base material, in which the base of the ruled line blade is embedded. The cross-sectional shape of the ruled line blade may be a triangle shape or an inverted V shape. The apex angle of the ruled line blade is preferably about 90 degrees. The average thickness of the adhesive layer is preferably 3 mm or more and 7 mm or less. [Selection] Figure 2

Description

  The present invention relates to a ruled line forming attachment for a corrugated cardboard flexographic printing machine and a corrugated cardboard flexographic printing machine.

  A cardboard box is generally formed by assembling a corrugated cardboard sheet having a ruled line (an easy-to-bend line) that is cut into a predetermined shape and pushed on the back surface. Also, the cardboard box is usually printed on the surface. And printing on such a cardboard sheet for a cardboard box is often performed by flexographic printing.

  For this reason, many corrugated cardboard production lines include an apparatus for forming ruled lines on the back surface of the corrugated cardboard sheet and a flexographic printing machine for printing on the surface of the corrugated cardboard sheet. Further, a corrugated sheet production line generally includes a plurality of flexographic printing machines in order to support multicolor printing.

  On the other hand, a cardboard box in which ruled lines are formed not only on the back surface but also on the front surface of the cardboard sheet has been proposed (see Japanese Patent No. 5981176). However, a ruled line cannot be formed on the surface of a corrugated cardboard sheet in a general corrugated cardboard production line. In this case, it is necessary to form a ruled line on the front side by taking out a corrugated cardboard sheet with a ruled line on the back side from the middle of the production line and re-supplying it to the production line upside down.

Japanese Patent No. 5981176

  In view of the above inconveniences, an object of the present invention is to provide a ruled line forming attachment that can be ruled using a corrugated cardboard flexographic printing machine and a corrugated sheet flexo printing machine that can be ruled.

  The invention made in order to solve the above-mentioned problems is a sheet-like base material that has flexibility and can be mounted on a plate cylinder of a corrugated cardboard flexographic printing machine, and is disposed on the base material, and the tip is corrugated cardboard. A ruled line forming attachment for a corrugated cardboard flexographic printing machine, comprising a ruled line blade pressed against a sheet, and an adhesive layer that has flexibility, is laminated on the base material, and has a base of the ruled line blade embedded therein. .

  The ruled line formation attachment can be applied to a plate cylinder of a corrugated cardboard flexographic printing machine to perform a ruled line process in which a ruled line blade is pressed against the corrugated cardboard sheet to make a line. Further, in the ruled line forming attachment, since the base part of the ruled line blade is embedded in the adhesive layer, the structure portion for fixing the ruled line blade does not directly contact the cardboard sheet to form an unintended fold. Therefore, it is possible to form ruled lines relatively accurately.

  The cross-sectional shape of the ruled line blade is preferably triangular or inverted V-shaped. Thus, since the cross-sectional shape of the ruled line blade is triangular or inverted V-shaped, the ruled line blade does not have corners (shoulders) that form lines on the corrugated cardboard sheet except for the apex. For this reason, a ruled line can be accurately formed by the corrugated cardboard sheet.

  The apex angle of the ruled line blade is preferably about 90 degrees. Thus, the ruled line blade can be prepared at a relatively low cost because the apex angle of the ruled line blade is approximately 90 degrees. Note that “substantially 90 degrees” means that the angle is 85 degrees or more and 95 degrees or less, preferably 89 degrees or more and 91 degrees or less.

  The average thickness of the adhesive layer is preferably 3 mm or more and 7 mm or less. Thus, when the average thickness of the adhesive layer is within the above range, the ruled line blade can be firmly fixed to the base material, and the adhesive layer is in contact with the corrugated cardboard sheet to corrugated cardboard. It is possible to prevent the formation of folds and wrinkles on the sheet.

  Another idea made in order to solve the above problems is the ruled line forming attachment, a plate cylinder formed in a cylindrical shape and capable of mounting the ruled line forming attachment on the outer peripheral surface, and disposed opposite to the plate cylinder. And a cardboard sheet flexo printing machine comprising an impression cylinder that conveys the cardboard sheet while pressing it against the plate cylinder.

  Since the corrugated sheet flexographic printing machine includes the ruled line forming attachment, the corrugated sheet flexographic printing machine can be used as an apparatus for printing on a corrugated cardboard sheet or an apparatus for processing ruled lines on a corrugated cardboard sheet.

  The ruled line forming attachment and the cardboard sheet flexographic printing machine of the present invention can process a ruled line on a cardboard sheet.

1 is a schematic diagram illustrating a corrugated sheet flexographic printing machine according to an embodiment of the present invention. It is a partial expanded sectional view of the ruled line formation attachment with which the corrugated cardboard flexographic printing machine of FIG. 1 is mounted. It is a partial expanded sectional view of the ruled line formation attachment of embodiment different from FIG. 2 of this invention. FIG. 4 is a partially enlarged cross-sectional view of a ruled line forming attachment of an embodiment different from FIGS. 2 and 3 of the present invention. FIG. 5 is a partially enlarged cross-sectional view of a ruled line forming attachment of an embodiment different from FIGS. 2, 3, and 4 of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Cardboard sheet flexo printing machine]
FIG. 1 shows a configuration of a corrugated sheet flexographic printing machine according to an embodiment of the present invention. The corrugated cardboard flexo printing machine is an apparatus that performs printing or ruled line processing on the surface of the corrugated cardboard sheet S.

  The corrugated cardboard flexographic printing machine itself is a ruled line forming attachment 1 which is another embodiment of the present invention, a plate cylinder 2 which is formed in a cylindrical shape and on which the ruled line forming attachment 1 can be mounted on the outer peripheral surface, An impression cylinder 3 is provided opposite to the plate cylinder 2 and conveys the cardboard sheet S while pressing it against the plate cylinder 2.

  The corrugated cardboard flexographic printing machine may further include an anilox roll 4 disposed adjacent to the plate cylinder 2 and a doctor chamber 5 for applying ink to the anilox roll 4.

  The corrugated sheet flexographic printing machine can also be formed by attaching the ruled line forming attachment 1 to a conventional corrugated cardboard flexographic printing machine.

<Rule line formation attachment>
As shown in detail in FIG. 2, the ruled line forming attachment 1 includes a flexible sheet-like base material 6, and a ruled line blade 7 disposed on the base material 6 and having a tip pressed against the cardboard sheet S. And an adhesive layer 8 that has flexibility and is laminated on the base material 6 and in which the base of the ruled line blade 7 is embedded.

(Base material)
The substrate 6 may be in the form of a sheet having sufficient strength. For example, a resin sheet, a metal plate or the like can be used, and a stainless steel plate is typically used.

  It is preferable that the base member 6 has engaging portions for attachment to the plate cylinder 2 at both ends in the circumferential direction in a state where the substrate 6 is mounted on the plate cylinder 2. As shown in FIG. 1, the engaging portion can be configured such that both ends of the substrate 6 are bent in the center direction of the plate cylinder 2 and fitted into a groove formed in the plate cylinder 2.

(Ruled line blade)
The ruled line blade 7 is fixed to the surface side of the substrate 6 by the adhesive layer 8 so that the ruled line forming attachment 1 extends in the axial direction of the plate cylinder 2 in a state where the ruled line forming attachment 1 is mounted.

  The ruled line blade 7 forms a ruled line in which the surface of the cardboard sheet S is linearly depressed by pressing the vertex farthest from the substrate 6 against the surface of the cardboard sheet S and pressing it. That is, the corrugated cardboard flexographic printing machine forms a ruled line perpendicular to the sheet passing direction of the corrugated cardboard sheet S. As a result, the corrugated cardboard sheet S can be folded along the ruled line relatively easily with the surface side as a valley.

  The ruled line blade 7 can be formed of a material having a constant cross-sectional shape and sufficient rigidity, such as a metal mold, typically an aluminum extruded material.

  The cross-sectional shape of the ruled line blade 7 is a shape having a vertex pressed against the corrugated cardboard sheet S and a base portion adjacent to the base material 6 at two or more points so as to be fixed to the base material 6. A specific cross-sectional shape of the ruled line blade 7 can be an inverted V shape as shown in FIG. That is, the ruled line blade 7 in FIG. 2 is an arrangement in which equilateral angle materials are faced down.

  The ruled line blade 7 has no corners other than the apex on the side facing the cardboard sheet S. For this reason, even if the ruled line blade 7 is bitten into S on the corrugated cardboard sheet, the portions other than the vertex cannot be pressed strongly. This ensures that the corrugated cardboard sheet S is bent along the ruled line without damaging the corrugated cardboard sheet S other than the intended ruled line.

  The lower limit of the average height of the ruled line blade 7 (the height in the radial direction of the plate cylinder 2) is preferably 4 mm, more preferably 6 mm. On the other hand, the upper limit of the average height of the ruled line blade 7 is preferably 10 m, and more preferably 8 mm. When the average height of the ruled line blade 7 is less than the lower limit, the corrugated cardboard sheet S may not be sufficiently pushed. On the other hand, when the average height of the ruled line blade 7 exceeds the above upper limit, there is a possibility that it becomes impossible to operate due to interference with the impression cylinder 3. The average height of the typical ruled line blade 7 can be set to 7 mm.

  The lower limit of the average width of the ruled line blade 7 (average of the width in the circumferential direction of the plate cylinder 2 in each cross section) is preferably 4 mm, and more preferably 8 mm. On the other hand, the upper limit of the average width of the ruled line blade 7 is preferably 15 mm, and more preferably 12 mm. When the average width of the ruled line blade 7 is less than the lower limit, the ruled line blade 7 may be detached due to insufficient fixation to the substrate 6. On the contrary, when the average width of the ruled line blade 7 exceeds the upper limit, there is a possibility that the base material 6 cannot be bent along the plate cylinder 2 when being mounted on the plate cylinder 2.

  The shape of the apex pressed against the corrugated cardboard sheet S is, for example, a circular shape having an arbitrary diameter, a shape having a flat apex and a width depending on the type of ruled line to be formed on the corrugated cardboard sheet S based on a well-known technique. Or any other shape.

  Further, the apex angle of the ruled line blade 7 is preferably about 90 degrees. Thereby, a commercially available material can be used as the ruled line blade 7 as it is, or it can be used as the ruled line blade 7 by simply applying a simple process to the commercially available material.

(Adhesive layer)
The adhesive layer 8 is laminated on the surface of the substrate 6 where the ruled line blade 7 is disposed and in the vicinity thereof. The adhesive layer 8 firmly covers the ruled line blade 7 by covering the base of the ruled line blade 7.

  The adhesive layer 8 is preferably formed of an adhesive having a relatively soft resin as a main component and having elasticity so that the cardboard sheet S is hardly damaged even if it is in contact with the cardboard sheet S.

  As the adhesive forming the adhesive layer 8, for example, a urethane-based adhesive, a silicone-based adhesive, a rubber-based adhesive, or the like is preferably used.

  The lower limit of the average thickness of the adhesive layer 8 is preferably 3 mm, and more preferably 4 mm. On the other hand, the upper limit of the average thickness of the adhesive layer 8 is preferably 8 mm, more preferably 6 m. When the average thickness of the adhesive layer 8 is less than the above lower limit, the ruled line blade 7 may be uncertainly fixed to the base material 6. On the contrary, when the average thickness of the adhesive layer 8 exceeds the above upper limit, the adhesive layer 8 is likely to come into contact with the corrugated cardboard sheet S, which may cause unnecessary damage to the corrugated cardboard sheet S. A typical average thickness of the adhesive layer 8 can be 5 mm. Further, from the viewpoint of reducing damage to the corrugated cardboard sheet S, the lower limit of the average protrusion height of the ruled line blade 7 from the adhesive layer 8 is preferably 1.0 mm, and more preferably 1.5 mm. A typical average protrusion height from the adhesive layer 8 of the ruled line blade 7 can be set to 2.0 mm.

  The lower limit of the difference between the average width of the adhesive layer 8 (average length in the circumferential direction of the plate cylinder 2) and the average width of the base of the ruled line blade 7 is preferably 8 mm, more preferably 12 mm. On the other hand, the upper limit of the difference between the average width of the adhesive layer 8 and the average width of the base of the ruled line blade 7 is preferably 50 mm, and more preferably 30 mm. When the difference between the average width of the adhesive layer 8 and the average width of the base of the ruled line blade 7 is less than the lower limit, the ruled line blade 7 may be easily detached from the substrate 6. On the other hand, when the difference between the average width of the adhesive layer 8 and the average width of the base of the ruled line blade 7 exceeds the above upper limit, the mountability of the ruled line forming attachment 1 on the plate cylinder 2 may be unnecessarily lowered. is there.

  In order to improve the adhesion (peeling strength) between the adhesive layer 8 and the substrate 6, surface treatment such as primer application may be performed on the surface of the substrate 6.

<Print cylinder>
The plate cylinder 2 is rotationally driven so that the peripheral speed is equal to that of the impression cylinder 3.

  The plate cylinder 2 is mounted with the ruled line forming attachment 1 or the printing plate on the outer peripheral surface. Therefore, the plate cylinder 2 preferably has a mechanism for holding the ruled line forming attachment 1 or the printing plate. As an example of the mechanism for holding the ruled line forming attachment 1 or the printing plate, it has a pair of grooves into which bent portions at both ends in the circumferential direction of the substrate 6 are fitted, and one groove can be moved in the circumferential direction. By applying tension to the base material 6 by moving the groove, the base material 6 can be brought into close contact with the outer peripheral surface of the plate cylinder 2.

  Such a plate cylinder 2 can have the same configuration as the plate cylinder of a conventional corrugated sheet flexographic printing machine.

<Impression cylinder>
The impression cylinder 3 is pressed against the ruled line forming attachment 1 or the printing plate while conveying the cardboard sheet S.

  Such an impression cylinder 3 can have the same configuration as the impression cylinder of a conventional corrugated cardboard flexographic printing machine.

<Anilox Roll>
The anilox roll 4 is supplied with a certain amount of ink on its surface and transfers this ink to a printing plate mounted on the plate cylinder 2.

  When the corrugated sheet S is subjected to ruled line processing by the corrugated sheet flexographic printing machine, the anilox roll 4 may be separated from the plate cylinder 2.

  Such an anilox roll 4 can have the same configuration as the anilox roll of a conventional corrugated cardboard flexographic printing machine.

<Doctor chamber>
The doctor chamber 5 is disposed close to the anilox roll 4, forms a space for storing ink between the anilox roll 4, and a doctor blade that regulates the thickness of the ink attached to the outer peripheral surface of the anilox roll 4. Have.

  Such a doctor chamber 5 can be made the same as the structure of the doctor chamber of the conventional corrugated cardboard sheet flexo printing machine.

<Advantages>
The corrugated cardboard flexographic printing machine can print on the surface of the corrugated cardboard sheet S by attaching a stamp to the plate cylinder 2, and can attach the ruled line forming attachment 1 to the surface of the corrugated cardboard sheet S on the surface of the corrugated cardboard sheet S. Ruled lines can be processed. For this reason, when the corrugated cardboard flexo printing machine is incorporated in the corrugated board production line, a ruled line can be put on the surface of the corrugated cardboard box by reducing the maximum number of printing colors by one color.

[Second Embodiment]
FIG. 3 shows a ruled line forming attachment 1a according to an embodiment different from FIG. 2 of the present invention. The ruled line forming attachment 1a has a flexible sheet-like base material 6, a ruled line blade 7a disposed on the base material 6 and having a tip pressed against the cardboard sheet S, and has flexibility. And an adhesive layer 8 that is laminated on the substrate 6 and in which the base of the ruled line blade 7a is embedded.

  The base material 6 and the adhesive layer 8 in the ruled line formation attachment 1a of FIG. 3 are the same as the base material 6 and the adhesive layer 8 in the ruled line formation attachment 1 of FIG. For this reason, description of the base material 6 and the adhesive layer 8 is abbreviate | omitted about the ruled line formation attachment 1a of FIG.

(Ruled line blade)
The ruled line blade 7a in the ruled line formation attachment 1a in FIG. 3 is the same as the ruled line blade 7 in the ruled line formation attachment 1 in FIG. 2 except for its cross-sectional shape. For this reason, the description which overlaps with the ruled line blade 7 of the ruled line formation attachment 1 of FIG. 2 is abbreviate | omitted about the ruled line blade 7a of the ruled line formation attachment 1a of FIG.

  The cross-sectional shape of the ruled line blade 7a is an inverted T shape. In other words, the ruled line blade 7a in FIG. 3 is a T-shaped material placed face down, that is, a T-shaped horizontal bar is placed below.

  The ruled line blade 7 a has a base portion (T-shaped horizontal bar portion) embedded in the adhesive layer 8, and corners of the end portions of the base portion are covered with the adhesive layer 8. For this reason, the ruled line blade 7a is unlikely to damage the corrugated cardboard sheet S because the corner (shoulder) of the end of the base part does not directly contact the corrugated cardboard sheet S.

  The ruled line formation attachment 1a of FIG. 3 is relatively easy to process when the height is reduced or the cross-sectional shape of the apex is adjusted when, for example, a commercially available aluminum extruded material is used as the ruled line blade 7a. It is.

[Third embodiment]
FIG. 4 shows a ruled line forming attachment 1b of an embodiment different from FIGS. 2 and 3 of the present invention. The ruled line forming attachment 1b has a flexible sheet-like base material 6, a ruled line blade 7b disposed on the base material 6 and having a tip pressed against the cardboard sheet S, and has flexibility. And an adhesive layer 8 which is laminated on the base material 6 and in which the base of the ruled line blade 7b is embedded.

  The base material 6 and the adhesive layer 8 in the ruled line formation attachment 1b in FIG. 4 are the same as the base material 6 and the adhesive layer 8 in the ruled line formation attachment 1 in FIG. For this reason, description of the base material 6 and the adhesive layer 8 is abbreviate | omitted about the ruled line formation attachment 1b of FIG.

(Ruled line blade)
The ruled line blade 7b in the ruled line formation attachment 1b in FIG. 4 is the same as the ruled line blade 7 in the ruled line formation attachment 1 in FIG. 2 except for its cross-sectional shape. For this reason, the description which overlaps with the ruled line blade 7 of the ruled line formation attachment 1 of FIG. 2 is abbreviate | omitted about the ruled line blade 7b of the ruled line formation attachment 1b of FIG.

  The cross-sectional shape of the ruled line blade 7b is a triangular shape, more specifically, a right isosceles triangular shape, and is arranged with the bottom side down.

  The ruled line blade 7 b is fixed to the base material 6 by burying the base portion (portion in the vicinity of the bottom side) in the adhesive layer 8.

  Since the ruled line blade 7b has a relatively simple cross-sectional shape, the ruled line blade 7b can be formed relatively easily when a new extrusion die is formed or when it is cut out from a square bar material.

[Fourth embodiment]
FIG. 5 shows a ruled line forming attachment 1c of an embodiment different from FIGS. 2, 3 and 4 of the present invention. The ruled line forming attachment 1c has a flexible sheet-like base material 6, a ruled line blade 7c disposed on the base material 6 and having a tip pressed against the cardboard sheet S, and has flexibility. And an adhesive layer 8 that is laminated on the base material 6 and in which the base of the ruled line blade 7c is embedded.

  The base material 6 and the adhesive layer 8 in the ruled line formation attachment 1c in FIG. 5 are the same as the base material 6 and the adhesive layer 8 in the ruled line formation attachment 1 in FIG. For this reason, description of the base material 6 and the adhesive layer 8 is abbreviate | omitted about the ruled line formation attachment 1c of FIG.

(Ruled line blade)
The ruled line blade 7c in the ruled line formation attachment 1c in FIG. 5 is the same as the ruled line blade 7 in the ruled line formation attachment 1 in FIG. 2 except for its cross-sectional shape. For this reason, the description which overlaps with the ruled line blade 7 of the ruled line formation attachment 1 of FIG. 2 is abbreviate | omitted about the ruled line blade 7c of the ruled line formation attachment 1c of FIG.

  As for the cross-sectional shape of the ruled line blade 7c, the cross-sectional shape of the base portion is an isosceles triangle, and has a plate-like portion that extends from the base portion and delimits the top portion pressed against the corrugated cardboard sheet S.

  The ruled line blade 7 c is fixed to the base material 6 by the base portion being embedded in the adhesive layer 8.

  Since the ruled line blade 7c is formed in an isosceles triangle shape with the base portion having no corners (shoulders), it is difficult to cause unintended damage to the corrugated cardboard sheet S, and the cardboard sheet S has a desired shape by the apex of the plate-shaped part. Ruled lines can be reliably formed.

[Other Embodiments]
The said embodiment does not limit the structure of this invention. Therefore, in the above-described embodiment, components of each part of the above-described embodiment can be omitted, replaced, or added based on the description and common general knowledge of the present specification, and they are all interpreted as belonging to the scope of the present invention. Should.

  In the ruled line forming attachment, a spacer for determining a distance between the base material and the ruled line blade may be embedded in the adhesive layer.

  The ruled line blade of the ruled line forming attachment may be asymmetric in cross-sectional shape. As a specific example, the ruled line blade may be disposed on the substrate with one side of the L-shaped extruded material facing down.

  The ruled line blade of the ruled line forming attachment may be a hollow member.

  In the corrugated cardboard printing machine, means for supplying ink to the anilox roll is not limited to the chamber doctor, and for example, an apparatus having a known configuration such as a roll system or an ink fountain system can be used.

  The ruled line forming attachment and the corrugated sheet flexographic printing machine can be particularly preferably used for ruled line processing on the surface side of the corrugated cardboard sheet (the outer surface side of the box formed from the cardboard sheet).

1, 1a, 1b, 1c Ruled line forming attachment 2 Plate cylinder 3 Impression cylinder 4 Anilox roll 5 Doctor chamber 6 Base material 7, 7a, 7b, 7c Ruled line blade 8 Adhesive layer S Corrugated cardboard sheet

Claims (5)

A sheet-like base material having flexibility and capable of being mounted on a plate cylinder of a corrugated cardboard flexographic printing machine;
A ruled line blade disposed on the base material, the tip of which is pressed against the cardboard sheet;
A ruled line forming attachment for a corrugated cardboard flexographic printing machine, comprising: an adhesive layer that has flexibility and is laminated on the base material and in which a base of the ruled line blade is embedded.   The ruled line forming attachment according to claim 1, wherein a cross-sectional shape of the ruled line blade is a triangle shape or an inverted V shape.   The ruled line forming attachment according to claim 2, wherein a vertex angle of the ruled line blade is approximately 90 degrees.   The ruled line forming attachment according to claim 1, wherein the adhesive layer has an average thickness of 3 mm or more and 7 mm or less. The ruled line forming attachment according to any one of claims 1 to 4,
A plate cylinder formed in a cylindrical shape and capable of mounting the ruled line forming attachment on the outer peripheral surface;
A corrugated cardboard flexographic printing machine, comprising: an impression cylinder that is disposed to face the plate cylinder and conveys the cardboard sheet while pressing the cardboard sheet against the plate cylinder.

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