JP4095933B2 - Nipping roller of rotary printing machine and rotary printing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention provides a rotary printing press, to nipping roller and rotary press feeding while creased to a web passing through the triangular plate of the folding machine.
[0002]
[Prior art]
A conventional nipping roller will be described with reference to FIGS. FIG. 5 is a schematic view of a newspaper rotary printing press, FIG. 6 is a schematic view showing the configuration of a newspaper rotary press, and FIG. 7 is a perspective view showing the positional relationship between a triangular plate, a lead-in roller and a nipping roller. is there. FIG. 8 is a schematic view showing the state of use of a conventional nipping roller, FIG. 9 is a schematic view showing a state in which a convex portion of a conventional nipping roller collar is worn, and FIG. 10 is a convex shape of a conventional nipping roller collar. It is an enlarged view which shows the state which the part was worn out.
[0003]
As shown in FIG. 5, in a general rotary printing machine, the web 11 is fed from the paper feeding device 1, the web 11 having a stable tension is supplied to the printing device 3 by the mark feeding device 2, and printing is performed by the printing device 3. Thereafter, a drag roller 4 is provided at an appropriate position in the web pass device 5, conveyed while applying an appropriate tension to the web, and discharged into a desired signature by the folding machine 6. In order to perform good printing on the continuous web 11, it is necessary to always apply an appropriate tension to the web 11. As shown in FIG. 6, the web 11 stacked after printing is folded in half in the longitudinal direction by the triangular plate 7, and is folded in the longitudinal direction via the lead-in roller 8 and the nipping roller 9. It is fed between 13 and cut, folded, and ejected as a signature. Thus, since the folding machine 6 cuts between the folding cylinder 12 and the saw cylinder 13, high tension cannot be applied to the web 11.
[0004]
Therefore, it is necessary to firmly hold and feed the web 11 that is still continuous. The nipping rollers 9 are paired and driven by a driving device (not shown), and the degree of pressing can be adjusted between the pair of nipping rollers 9 at a necessary speed with the web 11 passing between the nipping rollers 9 interposed therebetween. It is designed to send out. A plurality of sets of nipping rollers 9 may be provided. As shown in FIG. 8, in the nipping roller 9 portion, the web 11 is overlapped and folded in the longitudinal direction, and the bag side 111 and the flap side 112 not being folded are sandwiched and sent out. Therefore, when the web 11 is pressed across the entire width of the web 11, the bag side 111 and the side 112 have different thicknesses, and the web 11 is stretched differently. It becomes unstable. Therefore, the nipping roller 9 presses and feeds only the both sides of the width W of the web 11.
[0005]
As described above, the web 11 is pinched with a slight pressing length and pulled, so that this portion is easily worn. When worn, the speed of pulling the web 11 is relatively slow, so the web tension is lowered, the folding accuracy is deteriorated, and the print quality is affected. Therefore, in order to restore relatively inexpensively without replacing the entire nipping roller 9 even if the corresponding part is worn out, the worn part is made a separate body, the replacement part is made small, and can be reused. It has been devised.
[0006]
As shown in FIG. 8, the nipping roller 9 has nipping roller collars 91 assembled on both sides in the axial direction of the nipping roller main body 90. As shown in FIG. 8A, the nipping roller collar 91 is divided into two parts and fastened to the shaft portion 96 of the roller body. The nipping roller collar 91 has a convex portion 92 and the relief portion 93, the trunk middle of nipping roller body 90 is in the diameter of the same dimension as the relief portion 93.
[0007]
In this manner, the width of the convex portion 92 is set to 2 L, and the L dimension of each side edge (bag side 111, lever side 112) of the width W of the web 11 is pressed and sent to the folding cylinder 12 and the saw cylinder 13. There is something configured. Thus, when the width between the outer edges of the convex portion 92 of the nipping roller collar 91 is made wider than the width W of the web 11 and the convex portion 92 being used is worn, the direction of the nipping roller collar 91 is set in the axial direction. Inverted 180 degrees and used the remaining convex part. (For example, see Patent Document 1)
[0008]
[Patent Document 1]
Japanese Patent No. 3352701 [0009]
[Problems to be solved by the invention]
The convex portion 92 of the nipping roller collar 91 has a stepped portion 97 due to the wear of the web 11, but the position of the stepped portion 97 due to the wear, that is, both side edges of the web 11 width W are folded in the vertical direction. This is changed by adjusting the position of the tip 71 of the triangular plate 7 to be adjusted. The position of the tip 71 of the triangular plate 7 is adjusted by an adjusting device (not shown) so that the web 11 does not fold and tear at the tip of the triangular plate 71 due to changes in the number of webs 11 and other operating conditions.
[0010]
As described above, since the position where the convex portion 92 is worn is shifted by the change in the traveling position of the web 11, the wear step portion 97 does not necessarily have a clean stepped shape. Further, when the position of the passing web 11 is shifted to one side of the convex portion 92 as shown by a two-dot chain line in FIG. 10, the end portion may get on the portion where the end portion is not worn. In this case, since the speed at which the web 11 is pulled differs at both side edges (bag side 111, latch side 112) of the width W of the web 11, the tension of the web 11 becomes unstable and the traveling path becomes unstable. , Paper edge tears, and wrinkles.
[0011]
The present invention has been made in view of the above points, and prevents the web 11 from riding on the wear stepped portion 97 of the convex portion 92, and also makes it easy to replace the nipping roller collar 91, which is a wear component, at low cost. An object of the present invention is to provide a nipping roller that can be used, and a rotary printing press including the nipping roller.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention according to claim 1 is a nipping roller of a rotary printing press provided with a driving means at a shaft end and applying tension to the web by a driving force, on both shaft end sides of the nipping roller. A nipping roller collar for sandwiching the web, two convex portions provided on the nipping roller collar, and a relief groove provided between the convex portions. And
[0013]
According to the above configuration, when the convex portion of the nipping roller collar is worn, most of the change in the shape of the wear stepped portion falls within the range of the escape groove, so that the tension of the web related to the stepped portion is unstable, paper breaks, wrinkles The occurrence frequency is greatly reduced. Moreover, since the stepped portion defect is cleared, the replacement life of the nipping roller collar is greatly improved.
[0014]
In order to solve the above problems, the present invention according to claim 2, in the present invention as set forth in claim 1, in that the nipping rollers color line symmetrical identical shape about said clearance groove Features.
[0015]
According to the above configuration, by a nipping roller Color Sentai referred identical shape around a relief groove of a wider range of compatibility, even when it is not possible to use only one side only for some reason, those stored Will increase the possibility of use, leading to a reduction in storage space and disposal loss due to improved compatibility. Furthermore, materials are saved and costs are reduced.
[0016]
In order to solve the above-mentioned problem, the present invention described in claim 3 is the present invention described in claim 1, wherein a fitting concave portion or a convex portion is provided on a surface on which each of the divided nipping roller collars abuts. It is characterized in that it can be divided in the axial direction.
[0017]
According to the above configuration, the range of compatibility is further expanded, and the replacement work of the nipping roller collar is easy and inexpensive, so that the cost can be reduced.
[0018]
In order to solve the above problem, the present invention according to claim 4 includes a paper feeding unit that feeds out a web, a printing unit that prints on the web from the paper feeding unit, and a web that is conveyed from the printing unit. In a rotary printing machine provided with a folding section that cuts and carries out with a predetermined folding book, the nipping pin that is provided in the folding machine of the rotary printing machine and sandwiches the web between both shaft ends of a nipping roller that creases the web It has a grawler collar, a relief groove provided at a substantially central portion of the nipping roller collar, and two convex portions provided symmetrically about the relief groove.
[0019]
According to the above configuration, since the occurrence frequency of web tension instability, paper breakage, wrinkles, etc. is greatly reduced, the waste paper can be reduced, and the operation efficiency and reliability of the rotary printing press are improved. The
[0020]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. In addition, about the same site | part as the above-mentioned conventional thing, the same code | symbol is attached | subjected and shown in a figure, and the overlapping description is abbreviate | omitted.
1 to 3 are configuration diagrams of the nipping roller according to the first embodiment, FIG. 1 is a plan view showing an initial use state, FIG. 2 is a plan view showing a state in which the convex portion 92 is worn, and FIG. It is a top view which shows the state which replaced the nipping roller collar 91. FIG. 4 is a schematic view of a nipping roller collar according to another embodiment.
[0021]
In FIG. 1, a nipping roller 9 'is shown, and 91' is a nipping roller collar. The nipping roller collar 91 ′ is provided with two convex portions 92 ′, 92a ′ and 92b ′, and a relief groove 98 is provided between 92a ′ and 92b ′. Note that there are relief portions 93 on both side edges of the nipping roller collar 91 'as in the conventional case.
[0022]
As shown in FIG. 1, the widthwise dimension is such that the width of the convex portion 92 ′ is Ls, the width of the escape groove 98 is g, and both end portions of the convex portion 92 ′ are symmetric about the center of the escape groove 98. The dimension up to is C. The inner diameter d of the nipping roller collar 91 ′ is substantially the same as the outer diameter of the roller shaft portion 96 ′ of the nipping roller main body 90 ′, and the nipping roller collar 91 ′ is two in the circumferential direction as shown in FIG. It is divided, and the driving force can be transmitted from the nipping roller main body 90 'to the collar 91' by fastening the divided portion with a fastening bolt or the like. Moreover, the division | segmentation fastening location is provided in both edge parts (for example, escape part 93) other than convex-shaped part 92 'which contact | connects the web 11. FIG.
[0023]
However, the structure of the split nipping roller collar 91 'is one means for facilitating the replacement of the nipping roller collar 91'. As another example, the nipping roller collar 91 'is formed as an integral structure by a set screw or key. It is good also as a structure fixed to the nipping roller 90 '.
[0024]
Further, the nipping roller collars 91 ′ on both sides (X side, Y side) in the axial direction of the nipping roller 9 ′ have the same shape, thereby providing compatibility.
Further, as shown in FIG. 4, the nipping roller collar 91 'is divided into line symmetry symmetrically about the relief groove 98 of the nipping roller collar 91', and each of the divided nipping roller collars 91 'is tightened with a tightening bolt or the like. The driving force can be transmitted from the main body 90 'to the nipping roller collar 91'.
[0025]
Further, by providing a fitting concave portion or a convex portion on the surface (relief groove 98 side) with which each of the nipping roller collars 91 ′ divided in the axial direction abuts, the tightening portion to the nipping roller main body 90 ′ is the web 11. It is only necessary to provide it only on both side edges (for example, the escape portion 93) other than the convex portion 92 'that contacts the surface.
[0026]
The axial positions of the nipping roller collars 91 ′ on the X side and the Y side of the nipping roller 9 ′ are convex portions 92 a that sandwich the bag side 111 and the latch side 112 at both side edges of the web 11 width W. The position of the tip 8 of the triangular plate 7 is adjusted so that the end faces of the 'and 92b' on the clearance groove 98 side normally pass.
[0027]
The dotted line portion in FIG. 2 (a) shows the wear step portion 97 when there is no conventional relief groove, but when there is a relief groove, the wear step portion 97 ′ is high like the step portion 97 ′ indicated by the solid line. The place is subject to wear quickly, and the growth of the step becomes slow. Therefore, the influence caused by the web 11 riding on the stepped portion 97 ′ and the tension of the web 11 becoming unstable is much smaller than the conventional one, and the replacement life of the nipping roller collar 92 ′ is greatly extended. .
[0028]
In addition, since the collars 91 ′ on both sides of the nipping roller 9 ′ are made the same, when the nipping roller collar 91 ′ is worn and replaced as shown in FIG. 2, the right nipping as shown in FIG. The 94y and 95y surfaces of the grawler collar 91 'can be directly attached to the left side, and the left 94x and 95x surfaces can be attached to the right side as they are. In addition, as shown in FIG. 3B, the direction of the collars 91 ′ on the X side and the Y side can be reversed 180 degrees and attached. This broadens the compatibility range of the nipping roller collar 92 'and increases the potential for cost savings.
[0029]
As described above, the projections 92 ′ of the collar 91 ′ are provided in two places, and the relief groove 98 is provided between the projections 92 ′, so that the tension of the web 11 is always stable and the traveling path is stabilized. Therefore, generation of paper edge tears, wrinkles, etc. is suppressed.
In addition, since the nipping roller collars 91 'on both sides in the axial direction of the nipping roller 9' have the same shape and compatibility, replacement parts can be saved, the amount of replacement work can be reduced, and cost can be reduced. Become.
[0030]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the convex portion of the nipping roller collar is worn, most of the change in shape of the wear stepped portion falls within the range of the escape groove. The occurrence frequency of such web tension instability, paper breakage, wrinkles, etc. is greatly reduced. Moreover, since the stepped portion defect is cleared, the replacement life of the nipping roller collar is greatly improved.
[0031]
Further, according to the present invention described in claim 2, by a nipping roller Color Sentai referred identical shape around a relief groove in the case where the width of the compatibility spreading can only use one side only for some reason In this case, the possibility that the stored items can be used increases, which leads to reduction of storage space and disposal loss due to improved compatibility. Furthermore, materials are saved and costs are reduced.
[0032]
According to the third aspect of the present invention, the range of compatibility is further expanded, and the replacement work of the nipping roller collar is easy and inexpensive, so that the cost can be reduced.
[0033]
Further, according to the present invention described in claim 4, since the occurrence frequency of web tension instability, paper breakage, wrinkles, and the like relating to the stepped portion is greatly reduced, it is possible to reduce waste paper and to operate the rotary printing press. Efficiency and reliability are improved.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an initial use state of a nipping roller according to an embodiment of the present invention.
FIG. 2 is a schematic view showing a state where the convex portions of the nipping roller collar according to the embodiment of the present invention are worn.
FIG. 3 is a schematic view showing a state in which the nipping roller collar according to the embodiment of the present invention is replaced.
FIG. 4 is a schematic view of a nipping roller collar according to another embodiment of the present invention.
FIG. 5 is a schematic view of a general newspaper rotary printing press.
FIG. 6 is a schematic view showing an outline of a folding machine of a newspaper rotary printing press.
FIG. 7 is a perspective view showing a positional relationship between a triangular plate, a lead-in roller, and a nipping roller.
FIG. 8 is a schematic view showing a usage state of a conventional nipping roller.
FIG. 9 is a schematic view showing a state where a convex portion of a conventional nipping roller collar is worn.
FIG. 10 is an enlarged view showing a state in which a convex portion of a conventional nipping roller collar is worn.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Paper feeder 2 Infeed apparatus 3 Printing apparatus 4 Drag roller 5 Web path apparatus 6 Folding machine 7 Triangle plate 8 Lead-in roller 9 Nipping roller 11 Web 12 Folding cylinder 13 Saw cylinder 71 Triangle plate tip 90 Nipping roller main body 91 Nipping roller collar 92 Convex shape Part 93 Escape part 94 End face A
95 End face B
96 Roller body shaft portion 97 Wear stepped portion 98 Escape groove 111 Bag side 112 Edge side

Claims (4)

  In a nipping roller of a rotary printing press provided with a driving means at a shaft end and applying tension to the web by a driving force, provided on both shaft end sides of the nipping roller, a nipping roller collar for sandwiching the web, and the nipping roller color A nipping roller for a rotary printing press comprising two provided convex portions and a relief groove provided between the two convex portions. Nipping roller of a rotary printing machine according to claim 1, characterized in that the nipping rollers color line symmetrical identical shape around the relief groove. Each of nipping rollers colors obtained by dividing the fitting recesses or protrusions provided on the surface abutting, nipping rollers of the rotary printing press according to claim 1, characterized in that arranged to be divided in the axial direction. Rotary printing provided with a paper feeding unit for feeding out a web, a printing unit for printing on the web from the paper feeding unit, and a folding unit for cutting the web conveyed from the printing unit and carrying it out in a predetermined folding book A nipping roller collar which is provided in a folding machine of the rotary printing press and which sandwiches the web between both axial ends of a nipping roller which folds the web, and a relief groove provided in a substantially central portion of the nipping roller collar. A rotary printing press comprising two convex portions provided symmetrically about the escape groove.

Images