JPH0632032U - Printing plate bending device - Google Patents

Abstract

(57) [Summary] [Structure] A plurality of straightening rollers R _{1 to} R ₅ are arranged in parallel so as to be orthogonal to the direction in which the printing plate to be straightened should be conveyed.
Groove 1 on the outer peripheral surface of the straightening rollers R _{1 to} R _{5 in which} the inclination angle gradually becomes smaller as it goes downstream in the transport direction of the printing plate to be straightened.
~ 5 are formed. A roller R ₈ which forms a pair with one of the plurality of straightening rollers R ₃ is arranged at a position different from the grooves 1 to 5. When the printing plate to be straightened is fed to the straightening rollers R _{1 to} R ₅ , while it passes through the straightening rollers R _{1 to} R ₅ , the slanting angles of the grooves 1 to 5 gradually decrease to P ₁ to It is sequentially corrected as shown by P ₅ . Further, the roller R ₈ corrects the bent portions at L ₂ and L ₃ . [Effect] The bent portion of the printing plate to be corrected can be corrected very easily and accurately.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for extending a bent portion of a printing plate removed from a plate cylinder of a printing machine so that the bent portion is substantially flat.

[0002]

[Prior art]

The printing plate removed from the plate cylinder of the printing machine has a fold mark left on the same line indicated by L ₁ , L ₂ and L ₃ in FIG. Of these, the bent portion at L ₁ is the locking portion for mounting the printing plate on the outer peripheral surface of the cylindrical plate cylinder, and the bent portion at L ₂ and L ₃ is the cylindrical plate. This is the part that becomes the folded part when the printing plate is mounted on the outer peripheral surface of the cylinder.

[0003]

[Problems to be solved by the device]

By the way, the work of mounting the printing plate on the plate cylinder, or the work of removing the printing plate from the plate cylinder, that is, the so-called replacement work has conventionally been performed artificially. In this case, even if the shape of the printing plate is as shown in FIG. 10, there is no problem in the replacement work. However, in recent years, an automatic changer has been developed so that the printing plate can be automatically mounted on the plate cylinder or, conversely, can be removed from the plate cylinder. Due to the function of this automatic changer, if the printing plate had the shape shown in Fig. 10, it could not be attached to the automatic changer, so the folds at L ₁ , L ₂ and L ₃ should be changed. It is necessary to extend it so that at least that part is almost flat as shown in FIG.

[0004]

[Means for Solving the Problems]

 The present invention was developed to automatically perform this work, and a plurality of printing plates partially folded on the same line are arranged in parallel so as to be orthogonal to the direction in which they should be conveyed. A groove is formed on the outer peripheral surface of the straightening roller, the inclination angle of which gradually decreases as it goes downward in the transport direction of the printing plate to be straightened.

In addition, on the outer peripheral surface of a plurality of straightening rollers arranged in parallel so as to be orthogonal to the direction in which the printing plate partially folded on the same line should be transported, the transport direction of the printing plate to be straightened. While forming a groove in which the inclination angle gradually decreases as it goes downstream, a roller paired with at least one of the plurality of straightening rollers is arranged at a predetermined position different from the groove.

[0006]

[Action]

A plurality of straightening plates arranged in parallel so that one portion of the printing plate P ₀ is arranged in parallel so that the portion outside the bent portion at L ₁ in FIG. 10 is in each groove shown in 1 to 5 in FIG. When fed to the rollers R _{1 to} R ₅ , as shown in (a) to (e) of FIG. 9, while the rollers pass through the straightening rollers R _{1 to} R ₅ , the inclination angles gradually decrease. The sloping surfaces are sequentially corrected as shown by P _{1 to} P ₅ , and the bent portion at L ₁ is almost flat as shown in FIG. 11.

Further, in the way during this print transport, one at least of the plurality of straightening rollers R ₁ to R _5, for example by R _8, R ₈ to be R ₃ and pairs, FIG. 10 The L ₂ and L ₃ lines are pressed, and as shown in FIG. 11, both bent portions of L ₂ and L ₃ become substantially flat.

[0008]

【Example】

Embodiments of the present invention will be described with reference to the accompanying drawings. As shown in FIG. 1, five straightening rollers R _{1 to} R ₅ are arranged in parallel. Each of the straightening rollers R ₁ to R ₅ conveys one printing plate to be straightened, that is, a printing plate partially folded on the same line L ₁ , L ₂ and L ₃ as shown in FIG. They are arranged in parallel so as to be orthogonal to the power direction (from the bottom to the top in the case of FIG. 1). On the outer peripheral surface of each of the straightening rollers R _{1 to} R ₅ , there are grooves 1 to 5 in which the inclination angle gradually decreases as it goes downstream in the transport direction of the printing plate (in the case of FIG. 1, it goes upward). Form on the same line.

Each of the straightening rollers R _{1 to} R ₅ in the embodiment is located on the lower side of the pair of upper and lower rollers, and on the upper side thereof, the straightening rollers R _{1 to} R ₅ are arranged as shown in FIGS. 2 and 3. Rollers R _{6 to} R ₁₀ are arranged so as to be paired with R _{1 to} R ₅ . In the case of FIGS. 2 and 3, the printing plate is conveyed from the left side to the right side of the drawing.

In the embodiment, the upper roller R ₆ paired with the _first straightening roller R 1 in the printing plate P ₀ (FIG. 10) to be straightened is a brush roller. The roller R ₆ is a brush roller because the printing plate P ₀ to be straightened (FIG. 10) is first raised between the pair of upper and lower rollers R _{1 to} R ₆ and is extremely raised (FIG. 10). This is to make the entire surface flat by squeezing the rising part on the right side of the L ₁ part). The row La R ₆ is as shown in FIG. 4, there as the same width as the correction roller R ₁ located on the lower side.

Further, in the embodiment, the upper roller R ₈ paired with the _third correction roller R ₃ in the transport direction of the printing plate P ₀ (FIG. 10) to be corrected is the lower correction roller R 3. Two rollers are arranged at a predetermined distance from the groove ₃ and both rollers R ₈ and R ₈ are extremely thin as compared with the other rollers R ₆ , R ₇ , R ₉ and R ₁₀ (Fig. 6). reference). When the printing plate P ₃ being straightened is fed between the rollers R ₈ and R ₈ and the straightening roller R ₃ located on the lower side, the bent portions are pressed by pressing the portions L ₂ and L ₃ in FIG. the it is for the flat, to effect combined correction of L _2, L ₃ portion of the printing plate during straightening at the inclined surface while allowed positioned in the groove of the bent portion straightening roller in the L ₁ It is useful.

It should be noted that, except for R ₈ among the rollers R _{6 to} R ₁₀ located on the upper side, all have the same width as the lower straightening roller paired with them. As shown in FIGS. 1 and 4 to 8, most of the straightening rollers R _{1 to} R ₅ except the grooves 1 to 5 are covered with a synthetic resin material having a predetermined hardness. Of the upper rolls R _{6 to} R ₁₀ , R ₇ , R ₉ , and R ₁₀ are entirely covered with a synthetic resin material having a predetermined hardness.

A pair of upper and lower rollers arranged side by side in this way are synchronously rotated in the direction of the arrow in FIG. 3, and the printing plate P ₀ (FIG. 10) to be corrected is fed between the pair of upper and lower rollers. As a result, the bent portion at L _{1 and} the bent portions at L ₂ and L ₃ are corrected and can be made substantially flat as shown in FIG. 11. Next, the working conditions are shown in the order of steps. In the embodiment, the table 6 is arranged in front of a pair of upper and lower rollers arranged in parallel as shown in FIGS. The guide grooves 7 are formed on the same line as the grooves 1 to ₅ of the correction rollers R _{1 to} R ₅ located on the lower side (see FIG. 1). Therefore, when the portion of the printing plate P ₀ (FIG. 10) to be straightened to the left of L ₁ is inserted into the guide groove 7 and pushed toward the rollers arranged in parallel, the straightening rollers R _{1 to} R ₅ The part can be located on each groove 1-5.

[0014] to be corrected printing plate P ₀ (FIG. 10) is fed between the first straightening B over la R ₁ and the brush roller R ₆ which is rotating in the arrow direction of FIG. 3, FIG. 9 ( As indicated by P ₁ in a), the inclined surface of the groove 1 of the first straightening roller R ₁ slightly straightens the portion outside L ₁ (on the left side in the figure). Also, the rising part on the right side is squeezed by the brush roller R _{6 on the} upper side, making it flatter than ever.

Next, when the printing plate being straightened is fed between the second straightening roller R ₂ and the roller R ₇ which are rotating in the direction of the arrow in FIG. 3, at P ₂ in FIG. 9 (b). As shown, the inclined surface of the groove 2 of the second straightening roller R ₂ further straightens the portion outside L ₁ (on the left side in the figure). In addition, the portion on the right side that is squeezed by the brush roller R ₆ in the previous stage is entirely pressed by the lower correction roller R ₂ and the upper roller R ₇ .

Next, when this printing plate P ₂ is fed between the rollers R ₈ and R ₈ and the third straightening roller rotating in the direction of the arrow in FIG. 3, P ₂ in FIG. _As shown by 3, the inclined surface of the groove 3 of the _third correction roller R ₃ further corrects the portion outside L ₁ (on the left side in the figure). Then, here, the rollers R ₈ and R _{8 on the} upper side press the lines of L ₂ and L ₃ , and the streaks can be made as small as possible.

Further, when this printing plate P ₃ is fed between the fourth straightening roller R ₄ and the roller R ₉ which are rotating in the arrow direction of FIG. 3, it is shown by P ₄ in FIG. 9D. Thus, the inclined surface of the groove 4 of the fourth straightening roller R ₄ further straightens the portion outside L ₁ (on the left side in the figure).

Then, when the printing plate P ₄ is fed between the fifth (the last in the embodiment) straightening roller R ₅ and the roller R ₁₀ which are rotating in the arrow direction of FIG. 3, FIG. As shown by P ₅ in (e), the inclined surface of the groove 5 of the fifth straightening roller R ₅ further straightens the portion outside L ₁ (on the left side in the figure), and the printing plate P _{5 is} sent out from both rollers. Is almost flat as shown in FIG.

Note that, in the embodiment, as shown in FIG. 11, the portion outside L ₁ (on the left side of the figure) is corrected only to such an extent that it is slightly lowered in the drawing. This is because it is easy to mount the corrected printing plate on the plate cylinder of the printing machine by using the table. If you want to straighten the plate until it is completely flat, you can insert the printing plate P ₅ into a straightening roller with no inclined surface.

As described above, the bent portion at L ₁ in FIG. 10 can be corrected by the conveyance of the printing plate to be corrected by the grooves 1 to ₅ of the plurality of correction rollers R _{1 to} R ₅ arranged in parallel. This is because it becomes gradually looser as it goes downstream in the direction, and such a means makes it possible to correct the bent portion to be corrected very easily and accurately. In the embodiment, the correction rollers R _{1 to} R ₅ are arranged on the lower side, but they are arranged on the upper side so that the printing plate is turned upside down as compared with the case of FIG. Good.

In the embodiment shown in FIG. 2, the ink cleaning device 8, the plate surface protection device 9, and the drying device 10 are directly connected to the downstream of the straightening device of the present invention, and the ink is attached to the straightened printing plate. It is cleaned, and the plate surface is coated with a special chemical or rubber so that it can be taken out in a dry state. An automatic plate making machine is arranged immediately after the drying device 10, and a corrected and processed printing plate can be leaned against it.

[0022]

[Effect of device]

 According to the straightening device of the present invention, the bent portion of the printing plate to be straightened can be straightened very simply and accurately by a simple means.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention showing an arrangement state of correction rollers.

FIG. 2 is a schematic view showing a state in which an ink cleaning device, a plate surface protection device, and a drying device are directly connected to the straightening device shown in the embodiment.

FIG. 3 is a schematic side view showing an embodiment of the present invention.

FIG. 4 is a front view of a X ₁ -X ₁ portion of FIG. 3.

5 is a front view of X ₂ -X ₂ parts of FIG.

6 is a front view of X ₃ -X ₃ parts of FIG.

FIG. 7 is a front view of a portion X ₄ -X ₄ in FIG.

8 is a front view of X ₅ -X ₅ parts of FIG.

FIG. 9 is a front view showing the correction work status of the printing plate in the order of steps.

FIG. 10 is a front view of the printing plate before straightening.

FIG. 11 is a front view of the printing plate after straightening.

[Explanation of symbols]

R _{1 to} R ₅ ... Straightening roller, R _{6 to} R ₁₀ ... Roller, 1 to 5 ...
Groove, P ₀ ~P ₅ ... Print version

Claims (2)

[Scope of utility model registration request] 1. A downstream side of a printing plate to be straightened on the outer peripheral surface of a plurality of straightening rollers arranged in parallel so as to be orthogonal to the direction in which the printing plate partially bent on the same line is transported. An apparatus for correcting a bent portion of a printing plate, characterized in that a groove having a gradually decreasing inclination angle is formed as it goes to. 2. A downstream side of a printing plate to be straightened on the outer peripheral surface of a plurality of straightening rollers arranged in parallel so as to be orthogonal to the direction in which the printing plate partially bent on the same line is transported. Forming a groove of which the inclination angle gradually becomes smaller as it goes to, and a roller paired with at least one of the plurality of straightening rollers is arranged at a predetermined position different from the groove. Bend correction device.