JPH0744475U - Printing ink supply device - Google Patents

Abstract

(57) [Summary] [Object] To provide a printing ink supply device having a simple structure and capable of making the ink supply amount uniform in the axial direction. An ink reservoir 18 is formed on the outer peripheral surface 17 of a roll body 13 rotatably supported so as to make the ink amount in the axial direction uniform, and the outer peripheral surface 17 of the roll body 13 has a substantially flat plate shape in the axial direction. The ink fountain 16 is formed by bringing the blade member 14 into contact with the blade member 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing ink supply device, and more particularly, to a printing ink supply device that can evenly supply a printing ink supply amount.

[0002]

[Prior art]

 In general, most books, newspapers, catalogs, etc. are printed in large quantities by various printing devices such as offset, letterpress, and intaglio.

In such a printing apparatus, the printing ink in the ink fountain is supplied to a desired plate through a plurality of ink rolls and printed on a recording medium such as paper.

A conventional printing ink supply device used in such a printing device will be described with reference to FIG.

FIG. 4 is a perspective view showing a main part of a conventional printing ink supply device.

As shown in FIG. 4, a conventional printing ink supply device 1 stores a desired printing ink 4 between a roll body 2 and a blade member 3 which are arranged in parallel with each other. The remaining ink fountain 5 is formed. The roll body 2 has, for example, a diameter of 70 mm or more and a length of about 500 to 2000 mm, is rotatably supported by an appropriate frame (not shown), and the blade member 3 has a substantially flat plate shape. Further, the outer peripheral surface 6 of the roll body 2 and the tip portion 7 of the blade member 3 facing the roll body 2 are arranged in parallel with each other with an appropriate interval α. In addition, in the vicinity of the tip end portion 7 of the blade member 3 facing the roll body 2, a plurality of adjusting screws 8 as a gap adjusting member for adjusting the gap α between the blade member 3 and the outer peripheral surface 6 of the roll body 2 are provided. They are arranged at appropriate intervals in the axial direction of the roll body 2 via desired support members 9 fixed to an appropriate frame (not shown).

In the conventional printing ink supply device 1 thus configured, the desired printing ink 4 is introduced into the ink fountain 5 and the roll body 2 is rotated by the arrow shown in the figure. By rotating in a clockwise direction, an ink film 10 shown by a broken line in the drawing, which is formed by a gap α between the roll body 2 and the tip portion 7 of the blade member 3, is formed on the outer peripheral surface 6 of the roll body 2. After that, an appropriate ink roll 11 indicated by a two-dot chain line in the figure, which can be brought into contact with and separated from the ink film 10 formed on the outer peripheral surface 6 of the roll body 2, is brought into contact with the ink film 10 to make the ink roll 11 The ink film 10 is transferred onto the top. After that, the ink roll 11 is moved to a plurality of ink roll groups (not shown) to transfer the ink film 10, and the printing ink is supplied to a desired plate through the ink roll group. .

[0008]

[Problems to be solved by the device]

 However, in the conventional printing ink supply device 1 described above, the thickness of the ink film 10 formed on the outer peripheral surface 6 of the roll body 2 depends on the distance α between the roll body 2 and the tip portion 7 of the blade member 3. Although the distance α between the outer peripheral surface 6 of the roll body 2 and the tip portion 7 of the blade member 3 can be adjusted by a plurality of adjusting screws 8, the viscosity of the printing ink 4 is Due to the pressure at the time of forming the ink film 10 of the printing ink 4 due to its relatively high value, as shown in FIG. 5, the portion not supported by the adjusting screw 8 is larger than the interval α01 of the portion supported by the adjusting screw 8. There is a problem that the distance α 02 becomes large and the distance α between the outer peripheral surface 6 of the roll body 2 and the tip portion 7 of the blade member 3 becomes non-uniform in the axial direction.

That is, the thickness of the ink film 10 formed on the outer peripheral surface 6 of the roll body 2 becomes non-uniform in the axial direction of the roll body 2, and when the ink film 10 is transferred to the ink roll 11, The ink film 10a transferred to the roll 11 also has substantially the same shape in the axial direction, and the cross-sectional area (ink amount) in the radial direction of the ink film 10a varies depending on the axial portion. There is a problem in that a thick portion and a thin portion are generated, and as a result, it is difficult to uniformly supply the printing ink 4 to a plate (not shown).

The present invention has been made in view of these points, and it is an object of the present invention to overcome the problems of the above-mentioned conventional ones and to make the ink supply amount uniform in the axial direction with a simple structure. An object of the present invention is to provide a printing ink supply device that can be used.

[0011]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the printing ink supply device of the present invention according to claim 1 forms an ink reservoir on the outer peripheral surface of a rotatably supported roll body to make the ink amount in the axial direction uniform. At the same time, a substantially flat blade member is brought into contact with the outer peripheral surface of the roll body in the axial direction to form an ink fountain.

The printing ink supply device of the present invention according to claim 2 is characterized in that, in claim 1, the blade member is supported by a deformation preventing body.

Further, the printing ink supply device of the present invention according to claim 3 is the device according to claim 1 or 2, wherein the contact force of the blade member with respect to the roll body is adjusted to be independent. It has a feature.

[0014]

[Action]

 According to the printing ink supply device of the present invention having the above-described configuration, the roll body and the tip of the blade member are brought into contact with each other to form an ink fountain, and the ink amount in the axial direction is formed on the outer peripheral surface of the roll body. By forming a uniform ink reservoir, it is possible to easily supply printing ink having a uniform thickness in the axial direction.

[0015]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing an essential part of a printing ink supply device according to the present invention.

As shown in FIG. 1, in the printing ink supply device 12 of the present embodiment, an ink bottle 16 for storing a desired printing ink 15 is provided between the roll body 13 and the blade member 14. To be formed.

The roll body 13 has, for example, a diameter of 70 mm or more and a length of about 500 to 2000 mm, is rotatably supported by an appropriate frame (not shown), and is rotated by an appropriate drive source such as a motor (not shown). It is designed to be driven. An appropriate multi-thread spiral groove 18 as an ink reservoir for equalizing the ink amount in the axial direction is provided in a predetermined portion of the outer peripheral surface 17 of the roll body 13 except for both ends.

The blade member 14 is formed of an elastic body such as steel or stainless steel into a substantially flat plate shape, and one end thereof is in contact with the outer peripheral surface 17 on the lower left side of the roll body 13 in the drawing. Further, a substantially flat plate-shaped blade supporting member 19 as a deformation preventing body formed of a rigid body is arranged so as to support the blade member 14 from below in the drawing. The blade supporting member 19 is abutted with an adjustable abutting force so as not to project in the direction of the roll body 13 from the tip end portion 20 of the blade member 14 which abuts the roll body 13. That is, the tip end portion 20 of the blade member 14 is biased by the blade support member 19 toward the outer peripheral surface 17 of the roll body 13 with an adjustable contact force.

Next, the operation of this embodiment having the above-described configuration will be described with reference to FIGS. 1 to 3.

FIG. 2 is a schematic diagram showing a main part of an embodiment in which the printing ink supply device of the present embodiment is used in a relief printing device, and FIG. 3 is a schematic diagram illustrating a supply state of the printing ink. Is.

As shown in FIG. 2, the letterpress printing apparatus 21 using the printing ink supply apparatus 12 of the present embodiment prints on an appropriate frame (not shown) in order from the upstream side in the ink supply direction, as shown in FIG. Ink supply device 12, an ink roll group 22 that is parallel to outer peripheral surface 17 of roll body 13 of printing ink supply device 12, and is rotatable, and a desired cylinder-shaped relief plate 23 that is rotatable. , And a rotatable impression cylinder 24 formed of a rubber-like elastic body. The relief plate 23 and the impression cylinder 24 are in contact with each other through a sheet 25 as a recording medium with an appropriate pressing force, and the sheet 25 can run as indicated by an arrow in the figure. .

The ink roll group 22 includes, in order from the upstream side in the ink supply direction, appropriate ink rolls 26a, 26b and 26c formed of a rubber-like elastic body and metal rolls 27a and 27b made of appropriate metal. The outer peripheral surfaces are alternately arranged so as to contact each other with a desired contact force. The ink roll 26a located on the most upstream side in the ink supply direction has a double-headed arrow in the figure between the outer peripheral surface 17 of the roll body 13 and the surface of the metal roll 27a located downstream in the ink supply direction. It is movable so that it can be moved in and out as shown in. Further, the ink roll 26c located on the most downstream side in the ink supply direction is in contact with the relief plate 23 with a desired contact force. The ink rolls 26b and 26c other than the ink roll 26a adjacent to the roll body 13 are capable of reciprocating with a desired stroke in the axial direction.

In this state, when the desired printing ink 15 is put into the ink fountain 16 and the relief printing device 21 is operated, in the printing ink supply device 12, the roll body 13 rotates counterclockwise. To start.

Then, since the tip end portion 20 of the blade member 14 is brought into contact with the outer peripheral surface 17 of the roll body 13 by the blade supporting member 19 imparting an adjustable contact force, the printing in the ink bottle 16 is performed. The working ink 15 is filled in the multiple spiral groove 18 as an ink reservoir formed in the outer peripheral surface 17 of the roll body 13 shown in FIG. Further, in this case, at least the tip portion 20 of the blade member 14 can maintain a state in which the blade support member 19 reliably prevents deformation such as waviness.

Next, by bringing the ink roll 26a adjacent to the roll body 13 into contact with the roll body 13 at a predetermined timing, the ink roll 26a is moved from the metal roll 27a located on the downstream side in the ink supply direction. Separate. Then, as shown in FIG. 3, on the surface of the ink roll 26a, in a state where the shape of the printing ink 15 shown by the diagonal lines in the drawing filled in the multiple spiral grooves 18 of the roll body 13 is maintained. Transcribed. In other words, the printing ink 15 transferred to the surface of the ink roll 26a can be in a state where the amount of ink in the radial direction is the same at any portion in the axial direction unlike the conventional case. The shape of the ink reservoir recessed on the outer peripheral surface 17 of the roll body 13 has a shape such that the ink amount of the printing ink 15 transferred to the surface of the ink roll 26a is the same at any portion in the axial direction. You can select from various shapes such as iris mesh shape and wire bar shape according to the design concept.

Returning to FIG. 2, next, the ink roll 26a is separated from the roll body 13 at a predetermined timing and brought into contact with the metal roll 27a located on the downstream side in the ink supply direction.

Then, the printing groove 15 (FIG. 3) having the multiple spiral groove shape transferred to the surface of the ink roll 26a is transferred to the surface of the metal roll 27a and is rotated in the axial direction at any time by the rotation of both. While the ink film (not shown) having a uniform film thickness is formed, the ink is kneaded by the axial reciprocating motion of the ink rolls 26b and 26c and is supplied to the front surface of the relief plate 23 to form an image of desired characters on the paper 25. Is printed.

As described above, the printing ink supply device 12 of the present embodiment forms the ink fountain 16 by bringing the roll body 13 and the tip end portion 20 of the blade member 14 into contact with each other. Since the ink reservoir 18 with a uniform amount of ink in the axial direction is recessed on the outer peripheral surface 17 of the roll body 13, the printing ink 15 put in the ink fountain 16 can be securely stored in the ink reservoir 18 recessed in the roll body 13. The printing ink 15 filled in the ink reservoir 18 is transferred to the ink roll 26a while keeping the shape of the ink reservoir 18, and the printing ink 15 having a uniform thickness (amount) in the axial direction is formed. Can be easily supplied.

Further, since the contact force between the roll body 13 and the tip portion 20 of the blade member 14 can be adjusted, if the contact force between the roll body 13 and the tip portion 20 of the blade member 14 is reduced, the printing The ink 15 for printing is filled in the multiple spiral grooves 18, and an ink film (not shown) of the printing ink 15 having a desired thickness is also formed on the outer peripheral surface 13a between the multiple spiral grooves 18 of the roll body 13. By being formed, all of these printing inks 15 are transferred to the ink roll 26a, and the ink supply amount can be increased. That is, by adjusting the contact force between the roll body 13 and the tip end portion 20 of the blade member 14, the supply amount of the printing ink 15 can be increased or decreased, and the density adjustment of printing can be easily performed.

Further, as shown by a broken line in FIG. 1, a plurality of adjusting screws 28 as appropriate partial shading adjusting means are provided in the vicinity of the tip portion 20 of the blade supporting member 19 in a desired interval in the axial direction of the roll body 13. And the contact force between the roll body 13 and the blade member 14 is slightly weakened, and each adjusting screw 28 is controlled so that the contact force between the roll body 13 and the blade member 14 with respect to the axial direction of the roll body 13 is controlled. It can be partially adjusted. By doing so, it becomes possible to perform printing with shading in the axial direction of the roll body 13.

It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made as necessary.

[0033]

As described above, according to the printing ink supply device of the present invention, the roll body and the tip of the blade member are brought into contact with each other to form the ink fountain, and the outer circumference of the roll body is also formed. By forming an ink reservoir having a uniform amount of ink in the axial direction on the surface, it is possible to easily supply a printing ink having a uniform thickness in the axial direction.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main part of a printing ink supply device according to the present invention.

FIG. 2 is a schematic diagram showing a main part of an embodiment in which a printing ink supply device according to the present invention is used in a relief printing device.

FIG. 3 is a schematic diagram for explaining a supply state of the printing ink by the printing ink supply device according to the present invention.

FIG. 4 is a perspective view showing a main part of a conventional printing ink supply device.

FIG. 5 is a schematic diagram illustrating a supply state of printing ink by a conventional printing ink supply device.

[Explanation of symbols]

 12 Printing Ink Supply Device 13 Roll Body 14 Blade Member 15 Printing Ink 16 Ink Fountain 17 Outer Surface 18 Multi-Stage Spiral Groove (Ink Reservoir) 19 Blade Support Member (Deformation Preventing Body) 20 Tip Part 21 Letterpress Printing Device 22 Ink roll group 23 Letterpress 24 Impression cylinder 25 Paper (recording medium) 26a, 26b, 26c Ink roll 27a, 27b Metal roll

Claims (3)

[Scope of utility model registration request] 1. An ink reservoir is formed on the outer peripheral surface of a rotatably supported roll body to make the amount of ink in the axial direction uniform, and a blade member having a substantially flat plate shape is provided on the outer peripheral surface of the roll body in the axial direction. An ink supply device for printing, wherein the ink fountain is formed by contacting with each other. 2. The printing ink supply device according to claim 1, wherein a deformation preventing body is attached to the blade member. 3. The printing ink supply apparatus according to claim 1, wherein the contact force of the blade member with respect to the roll body is adjustable.