Abstract:
A rotary press facilitating a change-over to multiple web widths is provided. The rotary press comprising plural feeding parts supplying a web, plural printing parts printing the web and a folding part folding the web further comprises a turn bar changing a running direction of the web before the web sent from the printing parts enters the folding part and plural triangular formers leading the web to the folding part. By selecting the turn bar or adjusting a position of the turn bar, the web having various web widths can be appropriately led onto the triangular formers.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a rotary press performing printing corresponding to various web widths.  
         [0003]     2. Description of the Prior Art  
         [0004]     In printing newspapers, in order to efficiently perform the printing of newspapers that are published every day, such a news rotary press as exclusively designed and manufactured therefor is used.  
         [0005]     A first example of a prior art news rotary press will be described with reference to FIGS.  8  to  14 .  FIG. 8  is a plan view seen from above of this prior art news rotary press that corresponds to all-web width or every size of a web width.  FIG. 9  is a front view of the news rotary press of  FIG. 8  and  FIG. 10  is a side view of a folding part of the news rotary press of  FIG. 8  as seen in the direction of arrow X of  FIG. 9 .  
         [0006]     In  FIGS. 8 and 9 , a feeding part  1   a ,  1   b , printing part  2   a ,  2   b  and folding part  3  are arranged in one row so that a web can run straight. It is to be noted that while the feeding part  1  and printing part  2  are usually provided in the number of plurality according to the need, description here will be made with respect to an example of two rows.  
         [0007]     A web  5   a ,  5   b  unwound from a paper roll  4   a ,  4   b  fitted to the feeding part  1   a ,  1   b  is fed to the printing part  2   a ,  2   b  and has its web both sides printed by a plate cylinder  6  and blanket cylinder  7 . The printed web  5   a ,  5   b  is sent to the folding part  3 . Immediately before entering the folding part  3 , the web  5   a ,  5   b  has its web width center cut along the running direction by a slitter  8  above a drag roller  9 . Another drag roller  11  is provided above a triangular former  10   a ,  10   b  and an abutting roller  12  is arranged detachably to the drag roller  11 . The web  5   a ,  5   b , while being pinched between the drag roller  11  and abutting roller  12 , is sent to the respective triangular former  10   a ,  10   b  by rotation of the drag roller  11  to be thereby folded along the running direction. In the folding part  3 , the web  5   a ,  5   b  is cut and folded rectangularly to the running direction and then discharged in the arrow direction shown in  FIG. 8 .  
         [0008]     Further, a second example of a prior art news rotary press will be described with reference to  FIGS. 15 and 16 .  FIG. 15  is a plan view of this prior art news rotary press and  FIG. 16  is a front view of the news rotary press of  FIG. 15 .  
         [0009]     A plurality of feeding parts  1  are arranged in an axial direction of a paper roll  4  and a plurality of black printing units  24  corresponding one to one to the feeding parts  1  and one folding part  3  are arranged in parallel with the axial direction of the paper roll  4 . On the opposite side of each of the feeding parts  1  relative to the position of each of the black printing units  24 , a multi-color printing unit  25  corresponding to at least one of the black printing units  24  is arranged in the axial direction of the paper roll  4 . A web  5  coming out of the black printing units  24  and the multi-color printing unit  25  is cut into the half size (two pages) and a running direction of the web is changed by an angle of 90° by a moving turn bar  26  provided above the multi-color printing unit  25  so that the web  5  is led further to the folding part  3 .  
         [0010]     By this construction, the news rotary press can be made compact, spoilage (loss of paper) at the time of color adjustment of the multi-color printing can be lessened and operation efficiency of the rotary press can be enhanced. Also, by the moving turn bar provided between the feeding parts and the multi-color printing unit, a multi-color portion can be easily inserted into a position specified by the editing, as described in the Japanese Utility Model laid-open application Hei 3-70934 for example.  
         [0011]     In such news printing, the size of the page is decided and the web width corresponding to each rotary press is also decided. The web width is usually such a width as having 4 pages in the width direction. If a page layout is to be changed so that the web width is changed, such a web width as having 3 pages in the width direction as shown in  FIG. 12  or 2 pages in the width direction as shown in  FIG. 13  is often employed. In this case, the arrangement position of the web in the 3-page width or 2-page width can be variously set other than the patterns as illustrated in  FIGS. 12 and 13 .  
         [0012]     Here, with reference to FIGS.  11  to  14 , a position relation between a plate cylinder, slitter cutting the web along the running direction of the web and triangular former in the case of the news printing will be described.  FIG. 11  is an explanatory view showing the position relation in the case of a prior art news printing of a standard web width (all-web width),  FIG. 12  is an explanatory view showing the position relation in the case where a prior art news printing of a ¾ web width is carried out by an upper portion of the illustration of  FIG. 12 ,  FIG. 13  is an explanatory view showing the position relation in the case where a prior art news printing of a half web width is carried out by an upper half portion of the illustration of  FIG. 13  and  FIG. 14  is an explanatory view showing a position relation between a plate cylinder, slitter and triangular former in the case where a prior art printing of a non-standard web width (a web width narrower than a one-page width, for example) is carried out.  
         [0013]     A width directional position of the web  5   a ,  5   b  is decided by a position of a plate  21  of the plate cylinder. Even if the web width is changed, the page position of the web  5   a ,  5   b  is fixed relative to the folding part  3 . The position of the triangular former  10   a ,  10   b  in the folding part  3  is also arranged symmetrically relative to the center of the folding part  3  so as to correspond to the position of the folding line  13 ,  14  of the page. Also, the slitter  8  for cutting the web  5   a ,  5   b  along the longitudinal direction or the running direction of the web  5   a ,  5   b  is arranged at a position corresponding to the page. Moreover, the abutting roller  12  for sending the web  5   a ,  5   b  to the folding part  3  is needed to abut on and push a non-printed portion (of both ends of each page) of the web  5   a ,  5   b.    
         [0014]     However, in case where printing of a non-standard web width other than the news printing is to be carried out by this news rotary press, it is necessary that webs having various web widths are printed, folded and discharged differently from the printing of the standard web width. In this case, the position of the triangular former  10   a ,  10   b  is to be changed corresponding to the change of the position of the folding line  13 ,  14 .  
         [0015]     Thus, as the triangular former  10   a ,  10   b  must be of such a size as corresponds to the standard web width, the triangular former is arranged such that the apexes  23   a ,  23   b  of the two triangular formers  10   a ,  10   b  accord with the folding lines  14 ,  13 . In case of the non-standard web width shown in  FIG. 14 , in order to arrange the triangular former so that the apexes  23   a ,  23   b  of the two triangular formers  10   a ,  10   b  accord with the folding lines  14 ,  13 , the two triangular formers  10   a ,  10   b  must approach to each other so that central side portions  15  of the triangular formers  10   a ,  10   b  will be lapped one on the other. Hence, the central side portions  15  that are lapped one on the other are made by detachable exchange parts  16   a ,  16   b  and thereby the triangular formers  10   a ,  10   b  can be approached to each other so that the central side portions  15  are not lapped one on the other. Several kinds of these exchange parts  16   a ,  16   b  are prepared corresponding to the web widths and are exchanged so as to meet the various widths of the web  5   a ,  5   b.    
         [0016]     If the web width is changed as mentioned above, it is necessary that the position of the triangular former is moved corresponding to the difference of the web width. That is, in each case where the standard news printing is changed over to the non-standard web width printing and also in the reverse case thereof, position adjustment of the abutting roller  12  other than the abutting roller  12   a ,  12   b  that exists at least on the central position of the rotary press, position adjustment of the two triangular formers  10   a ,  10   b  and attachment and detachment of the exchange parts  16   a ,  16   b  at the time of interference of the triangular formers become necessary and a long working time is needed for change-over of the web width.  
         [0017]     Also, if the change-over work is to be automated, there are many places to be automated such that movement of the triangular former  10   a ,  10   b  and the abutting roller  12  on the drag roller  11  other than the abutting roller  12   a ,  12   b  is automatically adjusted to be appropriately positioned and hence the structure of the rotary press becomes complicated and expensive.  
         [0018]     Moreover, in the news printing, especially in the case of printing the non-standard web width, there are many folding structures and the printed web is often differently allotted to the triangular former  10   a  or  10   b . That is, if the example of  FIG. 11  is taken, by leading the web on a plane A, B of the printing part to the triangular former  10   a  or, reversely, by leading the web on a plane B, C to the triangular former  10   b , the aimed position change is achieved. For this purpose, however, many other turn bar devices are needed and this requires a large space and high cost of the rotary press.  
         [0019]     Further, it will be the largest problem if operation condition and operation state of the news printing, that is a main field of the rotary press and requires a large quantity and high speed of printing, are obstructed. In the news printing in which the latest news must be printed and supplied up to a specified time every day, it is a matter of course that obstruction of the news printing due to printing of the non-main field (printing of the non-standard web width, for example) must be avoided. Hence, in order to realize a rotary press that is able to correspond to various printing patterns and operation conditions of the recent non-standard printing, it is necessary to enhance the operability of each of the devices of the rotary press from the feeding part to the folding part so that the machine can be easily controlled by less number of operators.  
       SUMMARY OF THE INVENTION  
       [0020]     In view of the above-mentioned problems in the prior art rotary press, it is an object of the present invention to provide a rotary press in which arrangement of each constructing part of the rotary press is devised so as to solve the above-mentioned problems.  
         [0021]     In order to achieve the above object, the present invention of claim  1  is characterized in that, in a rotary press comprising a plurality of feeding parts supplying a web from a paper roll, a plurality of printing parts printing the web sent from the feeding parts and a folding part folding the web sent from the printing parts, the rotary press further comprises a slitter cutting the web along a running direction of the web, a turn bar changing the running direction of the web before the web sent from the printing parts enters the folding part and a plurality of triangular formers leading the web to the folding part and the turn bar is selected corresponding to a web width to be printed or a position of the turn bar is adjusted relative to the triangular formers.  
         [0022]     According to the construction mentioned above, the position adjustment of the turn bar is carried out and thereby webs having various web widths can be led to an arbitrary triangular former, a change-over work from a standard news printing to a non-standard printing can be easily done and the time required for the change-over can be greatly reduced.  
         [0023]     Also, in order to achieve the above object, the present invention of claim  2  is characterized in that, in the rotary press as mentioned in claim  1 , the turn bar comprises a turn bar corresponding to an all-web width and at least one turn bar corresponding to a web width narrower than the all-web width.  
         [0024]     According to the construction mentioned above, an optimal turn bar can be selected corresponding to the web width of the news printing and printing other than the news printing so that the web is appropriately led to the triangular former and thereby the change-over from the non-standard printing to the standard news printing can be easily done. That is, without damaging the efficiency required for the news printing, various non-standard web widths can be printed and also the change-over work can be easily automated. Thus, equipment cost of the rotary press can be reduced and enhancement of the printing efficiency can be realized.  
         [0025]     Also, in order to achieve the above object, the present invention of claim  3  is characterized in that, in the rotary press as mentioned in claim  1  or  2 , the feeding parts and the printing parts are arranged along the running direction of the web, the folding part is arranged in parallel with an axial direction of the paper roll in the feeding parts and the turn bar is provided between the printing parts and the folding part so that the running direction of the web is changed by an angle of 90° or approximately 90°.  
         [0026]     According to the construction mentioned above, the working time and workers required for the change-over of the web width can be reduced and the operability can be enhanced. Also, a high speed large size rotary press that is able to correspond to various web widths can be realized.  
         [0027]     Also, in order to achieve the above object, the present invention of claim  4  is characterized in that, in the rotary press as mentioned in claim  1  or  2 , the feeding parts are arranged on the same floor as the printing parts and/or the folding part and the turn bar is arranged above the printing parts arranged in parallel with an axial direction of the paper roll corresponding to the feeding parts so that the running direction of the web is changed by an angle of 90° or approximately 90°.  
         [0028]     According to the construction mentioned above, the change-over work of the web width can be done on the same floor and thereby the working time and workers required for the change-over can be greatly reduced and the operability can be enhanced. Also, a high speed large size rotary press that is able to correspond to various web widths can be realized. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0029]      FIG. 1  is a plan view of a news rotary press of a first embodiment according to the present invention.  
         [0030]      FIG. 2  is a front view of the rotary press of  FIG. 1 .  
         [0031]      FIG. 3  is an explanatory view showing a position relation of a plate of a plate cylinder, slitter, turn bar, abutting roller and triangular former in the case where a web width different from a standard width is printed by the rotary press of  FIG. 1 .  
         [0032]      FIG. 4  is an explanatory view showing a position relation of a plate of a plate cylinder, slitter, turn bar, abutting roller and triangular former in the case where a standard web width is printed by the rotary press of  FIG. 1 .  
         [0033]      FIG. 5  is a plan view of a news rotary press of a second embodiment according to the present invention.  
         [0034]      FIG. 6  is a front view of the rotary press of  FIG. 5 .  
         [0035]      FIG. 7  is a side view of the rotary press of  FIG. 5 .  
         [0036]      FIG. 8  is a plan view of a first example of a prior art news rotary press arranged in one row.  
         [0037]      FIG. 9  is a front view of the rotary press of  FIG. 8 .  
         [0038]      FIG. 10  is a view seen in the direction of arrow X of  FIG. 9 .  
         [0039]      FIG. 11  is an explanatory view showing a position relation of a plate, slitter and triangular former in the case of a prior art news printing of a standard all-web width.  
         [0040]      FIG. 12  is an explanatory view showing a position relation of a plate, slitter and triangular former in the case of a prior art news printing of a ¾ web width.  
         [0041]      FIG. 13  is an explanatory view showing a position relation of a plate, slitter and triangular former in the case of a prior art news printing of a half web width.  
         [0042]      FIG. 14  is an explanatory view showing a position relation of a plate, slitter and triangular former in the case of a prior art printing of a non-standard web width.  
         [0043]      FIG. 15  is a plan view of a second example of a prior art news rotary press.  
         [0044]      FIG. 16  is a front view of the rotary press of  FIG. 15 .  
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
     First Embodiment  
       [0045]     A rotary press of a first embodiment according to the present invention will be described with reference to FIGS.  1  to  4 .  FIG. 1  is a plan view seen from above of a rotary press of one row and  FIG. 2  is a front view of the rotary press of  FIG. 1 . Also,  FIG. 3  is an explanatory view showing a position relation of a plate of a plate cylinder, slitter, turn bar, abutting roller and triangular former in the case where a web having a web width different from a standard width (non-news web width) is printed by the rotary press of  FIG. 1 .  FIG. 4  is an explanatory view showing a position relation of a plate of a plate cylinder, slitter, turn bar, abutting roller and triangular former in the case where a web having a standard web width (news web width) is printed by the rotary press of  FIG. 1 . It is to be noted that, unless otherwise specifically defined, the size, material, shape, relative position, etc. of constructing parts and components of the embodiments according to the present invention are shown only for the purpose of exemplification and the scope of the present invention is not limited to those illustrated and described herein. Also, the parts and components same as the above-mentioned prior art ones are designated with the same reference numerals and repeated description thereon will be omitted.  
         [0046]     In  FIGS. 1 and 2 , the feeding part  1   a ,  1   b  that supplies the web  5   a ,  5   b  from the paper roll  4   a ,  4   b  and the printing part  2   a ,  2   b  that performs printing of the web  5   a ,  5   b  sent from the feeding part  1   a ,  1   b  are arranged in one row, like in the first example of the prior art news rotary press shown in FIGS.  8  to  10 , so that the web  5   a ,  5   b  runs straight before it enters the folding part  3 . The folding part  3  that folds the web  5   a ,  5   b  sent from the printing part  2   a ,  2   b  is of the same construction as the mentioned prior art case and is arranged in parallel with an axial direction of the paper roll  4   a ,  4   b  of the feeding part  1   a ,  1   b . The printed object, after folded, is discharged in the arrow direction shown in  FIG. 1 .  
         [0047]     While the web  5   a ,  5   b  sent from the printing part  2   a ,  2   b  runs toward the folding part  3 , it is necessary that the running direction of the web  5   a ,  5   b  is turned by an angle of 90° or approximately 90°. For this purpose, between the printing part  2   a ,  2   b  and the folding part  3 , as shown in  FIG. 3 , a set of two turn bars  17 ,  18  is arranged for one web. The position of the turn bars  17 ,  18  is adjustable by an adjusting device (not shown) in the moving direction shown by arrows in  FIG. 3  so that folding lines  14 ,  13  of the centers of two split webs  19 ,  20  accord with apexes  23   a ,  23   b , respectively, of the triangular former  10   a ,  10   b . Also, in case of the web for a standard news printing, a turn bar  22  made exclusively therefor is provided at a web path position separate from the turn bars  17 ,  18 .  
         [0048]     A case where printing is done on a web having a non-standard narrow web width will be described with reference to  FIGS. 2 and 3 . The relation between the feeding part  1   a ,  1   b  and the printing part  2   a ,  2   b  is the same as in the prior art case. Also, even in the case of changing the web width, like in the prior art case, the web runs so that the center of the web width accords with the center line of the machine. The printed web  5   a ,  5   b  is cut along the running direction by the slitter  8  on the drag roller  9  by the same method as the prior art case. The running direction of the split webs  19 ,  20  is changed rectangularly by the turn bars  18 ,  17 , respectively, so that the folding line  13  of the web  19  accords with the apex  23   b  of the triangular former  10   b  and the folding line  14  of the web  20  with the apex  23   a  of the web  10   a . Thus, while the position of the triangular former  10   a ,  10   b  that leads the web  19 ,  20  to the folding part  3  is kept fixed, a necessary folding can be achieved.  
         [0049]     In case of the news printing, both of the two webs  19 ,  20  are turned by the exclusive turn bar  22  that is on a reference position. The turn bar  22  has a length corresponding to all the standard web widths, as shown in  FIG. 4 . In case of a web having a non-standard narrow web width, the turn bar  17 ,  18  is arranged at a web path position separate from the turn bar  22 . The triangular former  10   a ,  10   b  is on the position that the folding line  13 ,  14  of the web  19 ,  20  accords with the apex  23   a ,  23   b  of the triangular former  10   a ,  10   b  and no adjustment corresponding to the change of web width is needed.  
         [0050]     As is clear from the above description, in case where the web width is to be changed from the news printing to the non-standard printing other than the news printing, the parts of which position change is needed are four abutting rollers  12   a ,  12   b ,  12   c  and  12   d  out of the abutting roller  12  on the drag roller  11  above the triangular former  10   a ,  10   b  and by moving these rollers, the position adjustment of the turn bar  17 ,  18  can be done. In case where the non-standard printing is to be changed to the news printing, only by moving the above-mentioned four abutting rollers, the web can run on the web path realized by the turn bar  22 .  
         [0051]     Also, in the news printing, by using the turn bar  17 ,  18 , that is, for example, by moving the turn bar  17  to the position on which the folding line  14  of the web  20  accords with the apex  23   b  of the triangular former  10   b , the web  20  can be led to the triangular former  10   b . That is, in the standard news printing (of the web width of 4 pages, 3 pages, 2 pages or 1 page) or in the non-standard printing, the turn bar  17 ,  18  or the exclusive turn bar  22  is appropriately selected and the position of the turn bar  17 ,  18  is appropriately adjusted, if needed, and thereby the web can be led to an arbitrary triangular former  10 . Thus, if a turn bar corresponding to the all-web width and at least one turn bar corresponding to the web width narrower than the all-web width are provided, all the printing, even in the case of the standard news printing or even in the case of printing of the non-standard web width, can be satisfied. It is to be noted that the number of the turn bars may be the same number as the triangular formers or plus one thereof.  
       Second Embodiment  
       [0052]     A rotary press of a second embodiment according to the present invention will be described with reference to FIGS.  5  to  7 .  FIG. 5  is a plan view seen from above of this rotary press,  FIG. 6  is a front view of the rotary press of  FIG. 5  and  FIG. 7  is a side view of the rotary press of  FIG. 5 . It is to be noted that the parts and components same as those of the above-described first embodiment are designated with the same reference numerals and repeated description thereon will be omitted.  
         [0053]     In  FIG. 5 , the feeding part  1   a ,  1   b  that supplies the web  5   a ,  5   b  from the paper roll  4   a ,  4   b  and the printing part  2   a ,  2   b  that performs printing of the web  5   a ,  5   b  sent from the feeding part  1   a ,  1   b  are arranged in parallel with an axial direction of the paper roll  4   a ,  4   b , like in the second example of the prior art news rotary press shown in  FIGS. 15 and 16 . Also, the feeding part  1   a ,  1   b  is arranged on the same floor as the printing part  2   a ,  2   b  and/or the folding part  3  so that the feeding part  1  corresponds one to one to the printing part  2 . Or a plurality of the feeding parts may be arranged so as to correspond to one printing part. As shown in  FIGS. 6 and 7 , printing of the web  5   a ,  5   b  unwound from the feeding part  1   a ,  1   b  is done in the printing part  2   a ,  2   b  and then the web  5   a ,  5   b  is cut along the running direction by the slitter  8  on the drag roller  9 . The running direction of the web  5   a ,  5   b  is turned by an angle of 90° or approximately 90° by the turn bar  17 ,  18  corresponding to the web width narrower than the all-web width or the turn bar  22  corresponding to the all-web width, both provided above the printing part  2   a ,  2   b , and the web  5   a ,  5   b  is led by the triangular former  10   a ,  10   b  so as to enter the folding part  3 . As shown in  FIG. 5 , the folding part  3  is arranged in the same row as the printing part  2   a ,  2   b  and, like in the first embodiment, the turn bar is selected according to the web width of the web to be printed or the position adjustment is done relative to the triangular former  10   a ,  10   b . Then, the printed object, after folded, is discharged in the arrow direction shown in  FIG. 8 .