JP2006218878A - Rotary press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exchange a printing cylinder with a little labor and in a short time in relation to a rotary press. <P>SOLUTION: The machine of this invention comprises the first suspension device which supports one shaft-end of the printing cylinder 8, the second suspension device 85 which supports the other end of the shaft of printing cylinder 8, the pressure receiver 37 set on the spindle of the printing cylinder 8 spin-free and prolonged outside of the supporting position by the second suspension device 85, the pressure member 38 which impresses the pressure receiver 37 downward, the transfer device which pushes out and transfers the pressure member 38 to the impression operation position in contact with the periphery of the pressure receiver 37 out of the evacuation position which does not contact the periphery of the pressure receiver 37, and the stopper which is near the other end of the shaft of the printing cylinder 8 and is positioned more toward the pushing out direction of the above-mentioned transfer device than the above-mentioned spindle and comes in contact with the above-mentioned spindle at the time of impression by the pressure member 38. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rotary printing press capable of changing a printing length by exchanging a printing cylinder.

  FIG. 20 is a schematic diagram showing an example of the configuration of a rotary printing press. In this rotary printing press, a web (paper) 11 that is a substrate to be printed is wound in a roll shape and disposed in the paper feeding device 1, and the web 11 continuously fed from the paper feeding device 1 is printed by the printing device 3. Printed. When the printing apparatus 3 is a printing apparatus that performs multicolor printing, printing units 7a to 7d corresponding to the number of printing colors are provided. FIG. 20 shows the case of four-color printing. The printed web 11 is conveyed to the folding machine 6 by the web pass device 5, cut to an appropriate length by the folding machine 6, folded, and then discharged as a folded book. FIG. 21 is a schematic diagram showing an example of a general printing unit 7 (printing units 7a to 7d in FIG. 20) provided in a rotary printing press. The printing unit 7 transfers an image of the inking device 10 for supplying ink, a dampening device 12 for supplying dampening water, a plate cylinder 8 equipped with a plate for forming a print image, and the plate cylinder 8 to the web 11. For example, a blanket cylinder 9 as a transfer cylinder.

  In a rotary printing press, the printing width can be changed by changing the width of the web 11, but the printing length cannot be changed. That is, the printing length in the rotary printing press is determined by the circumferential length of the plate cylinder 8 and the blanket cylinder 9, but the diameter of the plate cylinder 8 and the blanket cylinder 9 cannot be changed in a general rotary printing press. This is one of the disadvantages of a rotary printing machine, in which a sheet-fed printing machine can freely change both the width and length of printing paper.

  Therefore, techniques as described in Patent Document 1 and Patent Document 2 have been proposed as improvement measures for overcoming this drawback. The techniques described in these documents change the printing length by replacing the printing cylinder, that is, the plate cylinder 8 and the blanket cylinder 9 with different diameters. 22 and 23 are shown in Patent Document 1. Here, the printing cylinder is accurately held at both ends by the fixed shaft 14 inside the support shaft 15 and is securely fixed by the fixing device 16. It has become so. The diameter of the printing cylinder is changed from a solid line (plate cylinder 8, blanket cylinder 9, and impression cylinder 19) shown in FIG. 22 to a broken line (plate cylinder 8 ', blanket cylinder 9', impression cylinder 19 '). In this case, the printing cylinder can be detached from the support shaft 15 by releasing the fixing device 16 and releasing the fixed shaft 14 as shown in FIG. The removed printing cylinder is taken out from the front direction of the printing unit by a separate attachment / detachment device (not shown). Then, after the new printing cylinder is attached in the reverse order of removal, as shown in FIG. 22, the support arms 17 and 20 that support each printing cylinder are rotated to move each printing cylinder from the solid line position to the broken line position. By moving the, each printing cylinder is positioned with a new positional relationship.

24, 25, and 26 are shown in Patent Document 2, but the diameter of the printing cylinder is shown by a solid line (plate cylinder 8, blanket cylinder 9) to that shown by a broken line (plate cylinder 8 ', blanket). When changing to the cylinder 9 '), first, as shown in FIG. 25, the arms 17 and 18 are moved in the axial direction to the positions indicated by the broken lines (the positions of the arms 17' and 18 '). Remove the arms 17 and 18 from the ends. The removed arms 17 and 18 are rotated around the shafts 23 and 24 by the arm moving device 22 as shown in FIG. 26, respectively, and moved to a position away from the removal hole 21 of the side frame 13m. Alternatively, the arms 17 and 18 are moved further in the axial direction and completely removed from the apparatus. In this state, the printing cylinders 8 and 9 are taken out from the take-out hole 21, and a new printing cylinder having a different diameter is inserted and attached by the reverse operation of the removal. Then, as shown in FIG. 24, the support arms 17 and 18 are rotated to move the printing cylinders to the positions indicated by broken lines, whereby the printing cylinders are positioned with a new positional relationship.
JP-A-5-77391 Japanese Patent Laid-Open No. 6-171059

In the technique described in Patent Document 1, the entire printing cylinder is exchanged, so that the weight is large, and the burden when replacing the printing cylinder is large. Also, since the main body of the printing cylinder and the left and right support shafts are separate, the support device (support arm) cantilever-supports the printing cylinder main body from both ends, and the support device is large and highly rigid. There is a need.
On the other hand, in the technique described in Patent Document 2, since the printing cylinder is composed of a shaft and a sleeve, the printing cylinder can be replaced only by removing the sleeve from the shaft and replacing it with a different diameter. Further, since both ends of one shaft are supported by the left and right support devices (support arms), the bending moment applied to the support device is separated from the trunk body and the support shaft as in the technique described in Patent Document 1. The support device can be made small in size.

  However, in this technique, when exchanging the printing cylinder, it is necessary to remove the arm moving device so as not to interfere with the printing cylinder taken out in the axial direction, and it is necessary to remove the arm moving device individually for each printing cylinder. is there. In the multi-color rotary printing press shown in FIG. 20, the number of printing units is usually four or more. Therefore, when changing to a printing cylinder having a different diameter, each of the plate cylinder and the blanket cylinder has 16 sets, that is, 32. It is necessary to remove and attach the arm moving device for the pair of printing cylinders. In some cases, it is necessary to remove and attach individual support arms so as not to interfere with the printing cylinder. This greatly increases the amount of work associated with the replacement of the printing cylinder, which takes time and reduces productivity.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a rotary printing machine capable of replacing a printing cylinder in a short time with little effort.

  In order to achieve the above object, a rotary printing press according to the present invention (Claim 1) supports a first support device for supporting one axial end portion of a printing cylinder and the other axial end portion of the printing cylinder. A second support device, a pressure receiving portion that is rotatably provided on a shaft of the printing cylinder that extends outward from a support position by the second support device, and a pressing member that presses the pressure receiving portion downward. A moving device that pushes and moves the pressing member from a retracted position that does not contact the outer periphery of the pressure receiving portion to a pressing operation position that contacts the outer periphery of the pressure receiving portion; and in the vicinity of the other shaft end of the printing cylinder, The stopper is disposed on the side of the moving device in the pushing direction with respect to the shaft, and is in contact with the shaft when pressed by the pressing member.

  For example, when the printing cylinder is replaced, the first support device is detached from one shaft end portion of the printing cylinder so that the printing cylinder is supported only by the second support device. There is a possibility that an excessive load corresponding to the weight of the printing cylinder may be applied to the bearing of the support device 2 according to the principle of the lever. Therefore, the shaft of the printing cylinder is extended outward from the support position by the second support device, a pressure receiving portion is provided outside the support position of the shaft end portion, and the pressure receiving portion is pressed downward by the pressing device. The reaction force generated in the bearing is reduced by the amount that the moment caused by the pressing force cancels the moment of the printing cylinder, and an excessive load is prevented from being applied to the bearing. The pressing device can be moved to the pressing operation position and the retracted position by the moving device. It is preferable that the pressing position of the pressure receiving portion by the pressing device at the pressing operation position can be finely adjusted by the adjusting means. The pressing device can be attached to the outside of the second side frame.

In this case, it is preferable that the pressure receiving portion is formed by a plurality of planes on the outer peripheral portion (claim 2).
That is, the pressure receiving portion is rotatably provided on the shaft body of the printing cylinder, and the outer peripheral portion thereof is formed by a plurality of planes, so that the pressing surface is reliably engaged with the outer periphery of the pressure receiving portion regardless of the rotation of the printing cylinder. Can do.

  Moreover, the rotary printing press (Claim 3) of the present invention is the rotary printing press according to Claim 1 or 2, wherein the pressing member has a pressing surface that contacts an outer periphery of the pressure receiving portion. The perpendicular is slightly inclined toward the pushing direction of the moving device in a plane perpendicular to the axis of the printing cylinder with respect to the pushing direction of the pressing member. By tilting the pressing surface, a component of force in the horizontal direction as well as in the vertical direction is generated, and the pressure receiving portion tends to be displaced in the horizontal direction, but the displacement of the pressure receiving portion in the horizontal direction is restricted by the stopper. Thereby, it is possible to accurately position the pressure receiving portion in the horizontal direction.

In this case, it is preferable that the pressing surface is planar.
The rotary printing machine of the present invention is provided with a moving frame on the outer side of one of the first and second side frames provided at intervals and sandwiching the printing cylinder from both sides. It is preferable that a first support device for supporting one of the shaft end portions is provided on the moving frame, and a second support device for supporting the other shaft end portion of the printing cylinder is provided on the second side frame. In this case, two types of moving devices that move the moving frame with respect to the first side frame are provided, and the moving frame is moved in the axial direction of the printing cylinder with respect to the first side frame by one first moving device, The first supporting device is attached to and detached from the shaft end of the printing cylinder, and the second supporting device is moved away from the shaft end of the printing cylinder by the movement of the moving frame in the axial direction. The moving frame is slid with respect to the first side frame.

  As a result, the end of the printing cylinder on the first side frame side is opened and the side surface of the first side frame is also opened, so that the printing cylinder can be extracted in the axial direction. In other words, according to the rotary printing press of the present invention, it is possible to extract the printing cylinder only by moving the moving frame in two stages, and the printing cylinder can be replaced in a short time with less labor compared to the prior art. Can do.

In the rotary printing press according to the present invention, it is preferable that the printing cylinder is composed of a shaft and a sleeve. In this case, the printing cylinder is replaced by removing only the sleeve from the shaft while the end portion of the shaft is supported by the second support device. By preparing sleeves having the same inner diameter and different outer diameters, the diameter of the printing cylinder can be changed.
In a rotary printing press, the printing length can be changed by changing the diameter of the printing cylinder. However, when the diameter of the printing cylinder changes, it is necessary to adjust the positional relationship between the printing cylinders. In the rotary printing press according to the present invention, the first support device and the second support device are configured so that the support position of the printing cylinder can be adjusted according to the diameter of the printing cylinder, so that the printing length can be changed. Can do.

  A printing apparatus of a rotary printing press is provided with a plurality of printing cylinders, but when changing one printing cylinder as in the case of changing the printing length, it is common to exchange the other printing cylinders together. It is. Therefore, preferably, when the printing apparatus has a plurality of exchangeable printing cylinders and a plurality of first and second support apparatuses are provided corresponding to the exchangeable printing cylinders, one moving frame is provided. A plurality of first support devices are provided in the main body. According to this, since all the printing cylinders can be extracted and replaced by moving one moving frame, the first support device for each printing cylinder can be replaced with a separate moving frame in a short time with less labor. The printing cylinder can be replaced.

  The moving frame and the first side frame are preferably positioned at appropriate positions when at least the first support device engages with the shaft end of the printing cylinder. As positioning means, a convex portion is provided on one of the moving frame and the first side frame and a concave portion is provided on the other, and when the first support device engages with the shaft end of the printing cylinder, What is necessary is just to make it a convex part fit into a recessed part. The convex portion and the concave portion can be provided at arbitrary positions. When the support device has a support arm that rotates while supporting the shaft end of the printing cylinder, the rotation central axis of the support arm is set to the first rotation axis. It can also be made to project by projecting to the side frame side.

  As described in detail above, according to the rotary printing press of the present invention, when the printing cylinder is replaced, it is possible to prevent an excessive load from being applied to the bearing, and the printing cylinder can be replaced in a short time with little effort. There is an effect that can be.

Embodiments of the present invention will be described below with reference to the drawings.
(A) 1st Embodiment 1st Embodiment of this invention is described based on FIGS. In addition, about the site | part or member (it does not mean the site | part or member which has the same structure) corresponding to the above-mentioned conventional thing, the same code | symbol is attached | subjected and shown in the figure.

  As shown in FIG. 1, the printing unit of the rotary printing press according to the present embodiment is configured as a duplex printing unit that performs printing on both sides of the web 11, and the ink devices 10 a and 10 b are respectively provided on the upper side and the lower side of the web 11. And dampening devices 12a and 12b. Each inking device 10a, 10b is provided with plate cylinders 8a, 8b and blanket cylinders 9a, 9b, respectively. In the rotary printing press of this embodiment, as shown by the solid line and the broken line in FIG. 1, the plate cylinder 8 and the blanket cylinder 9 (hereinafter, the plate cylinder and the blanket cylinder may be collectively referred to as a printing cylinder) have a diameter. It can be changed to a different one. In addition, in each drawing including FIG. 1, suffixes “a” and “b” after the reference numerals are for distinguishing the upper side and the lower side from the web 11, and a is an upper part or member. And b indicates the lower side. In the following description, a and b are added when distinguishing the upper side and the lower side, but unless otherwise distinguished, a and b are omitted, and each part or member is indicated only by a reference numeral. . Further, in the drawings including FIG. 1, parts and members having suffixes “′” and “″” after the reference numerals are parts and members having the same reference numerals without suffixes “′” and “″”. It shows after the shape and position change.

  2 is a detailed side view of the printing unit shown in FIG. 1, FIG. 3 is a cross-sectional view taken along arrow III-III in FIG. 2, and FIG. 4 is a view taken along arrow IV-IV in FIG. As shown in FIG. 3, the printing unit is provided with a pair of side frames 13m and 13d at intervals, and the printing cylinders 8 and 9 are arranged between the side frames 13m and 13d. A moving frame 25 is disposed outside the one side frame (first side frame) 13m. The side frames 13m and 13d are fixed in position, whereas the moving frame 25 can be moved by means described later. The printing cylinders 8 and 9 include shafts 802 and 902 and sleeves 801 and 901 fitted to the shafts 802 and 902. One ends of the shafts 802 and 902 are attached to a side frame (second side frame) 13d. The support arms (second support devices) 85 and 95 are supported by bearings 86 and 96, and the other ends of the shafts 802 and 902 are attached to the moving frame 25. 91 is supported via bearings 84 and 94.

  As shown in FIG. 2, the support arms 81 and 91 on the moving frame 25 side support the bearings 84 and 94 of the printing cylinders 8 and 9 at the center thereof. One ends of the support arms 81 and 91 extending from the central portion are rotatably attached to shafts 82 and 92 provided on the moving frame 25, and the other ends are coupled to the rods of the actuators 83 and 93 with pins. The actuators 83 and 93 are rotatably attached to support pins 831 and 931 provided on the moving frame 25. As the actuators 83 and 93, compressed air pressure, hydraulic pressure, an electric motor, or the like can be used. In the figure, a hydraulic cylinder that uses hydraulic pressure is shown. With such a configuration, by operating the actuators 83 and 93, the support arms 81 and 91 are rotated about the shafts 82 and 92, and the positions of the bearings 84 and 94, that is, the centers of the printing cylinders 8 and 9 are obtained. The position can be changed. The description of the structure of the support arms 85 and 95 on the side frame 13d side is omitted, but the structure may be the same as that of the support arms 81 and 91 on the movable frame 25 side. You may make it a structure which follows according to rotation.

  Next, means for moving the moving frame 25 will be described. As shown in FIGS. 2 and 4, the moving frame 25 is attached to the operation side frame 13 m via a fixed bracket 26 and a lateral movement bracket 27. The fixed bracket 26 is fixed to the side frame 13m, and the horizontal movement bracket 27 is fixed in the printing cylinder axis direction (Y direction in FIG. 4) and can be moved in the horizontal direction (X direction in FIG. 2). A fixed bracket 26 is supported via a dynamic bearing 29. The lateral movement linear motion bearing 29 includes a rail 291 and a table 292. The table 292 is fixed on the fixed bracket 26 side, and the rail 291 is fixed on the lateral movement bracket 27 side. Thereby, the horizontal movement bracket 27 carrying the moving frame 25 can move in the horizontal direction with high accuracy.

  Further, as shown in FIG. 2, the main body of the lateral movement actuator 31 is fixed to the fixed bracket 26, and one end of the rod 311 is engaged with the lateral movement bracket 27. When the lateral movement actuator 31 is actuated to push out the rod 311, the lateral movement bracket 27 on which the moving frame 25 is placed is pushed out to the position (indicated by the reference numeral 25 ″) indicated by a two-dot chain line in FIG. 2. 8 shows the positional relationship between the moving frame 25 and the side frame 13m at this time, and the removal provided on the side frame 13m as the moving frame 25 slides greatly in the horizontal direction. The front surface of the use hole 131 is opened, and the removal hole 131 is a hole for taking out sleeves 801 and 901 to be replaced when the diameters of the printing cylinders 8 and 9 are changed as shown in FIG. 9 and 10 is also set to a size that allows the sleeves 801 and 901 of any diameter to pass through. Further, a hole 251 is provided in accordance with the position of the printing cylinders 8 and 9. This hole 251 is used for passing the bearings 84 and 94 provided at the shaft ends of the printing cylinders 8 and 9 to the support arms 81 and 91. It is a hole and is set to a size that prevents the bearings 84 and 94 and the shafts 802 and 902 from hitting the moving frame 25 no matter where the printing cylinders 8 and 9 are located.

  Between the lateral movement bracket 27 and the movement frame 25, an axial movement linear motion bearing 28 for moving the movement frame 25 in the printing cylinder axis direction is provided. The axial movement linear motion bearing 28 includes a rail 281 and a table 282. The rail 281 is fixed to the lateral movement bracket 27, and the table 282 is fixed to the moving frame 25. As a result, the laterally moving bracket 27 mounts the moving frame 25 and can move the moving frame 25 in the printing cylinder axis direction with high accuracy.

  The lateral movement bracket 27 is provided with an axial movement actuator 30 as shown in FIG. As shown in FIG. 5, the axial movement actuator 30 includes a moving element 301 and a cylinder tube 302, and the moving element 301 slides on the cylinder tube 302 when the actuator 30 is operated. Both ends of the cylinder tube 302 are fixed to the lateral movement bracket 27 by cylinder fixing brackets 303, and the mover 301 is fixed to the movement frame 25 by connection brackets 304. As a result, when the axial actuator 30 is actuated to move the moving element 301, the moving frame 25 moves in the Y direction in FIG. 4 with respect to the side frame 13m. In FIG. 5, the actuator 30 is indicated by a magnet type rodless air cylinder, but the present invention is not limited to this.

As shown in FIGS. 2 and 4, the moving frame 25 is also provided with an axial movement actuator 35 different from the axial movement actuator 30 described above. The actuator 35 operates only when the moving frame 25 is not moving in the lateral direction, and has a structure as shown in FIGS.
6 is a view in the direction of arrow E in FIG. 2, and FIG. 7 is a view in the direction of arrow F in FIG. The actuator 35 includes a moving element 351 and a cylinder tube 352. When the actuator 35 is operated, the moving element 351 slides on the cylinder tube 352. The cylinder tube 352 is fixed to the moving frame 25 via cylinder fixing brackets 353 and 355, and a fixing tool 358 is fixed to the moving element 351. A rod 357 having a convex portion 307 at the tip is fixed to the fixture 358, and the rod 357 is moved in the trunk axis direction by the operation of the actuator 35.

  The convex portion 307 at the tip of the rod 357 is engaged with a concave member 309 fixed to the side frame 13 m when the moving frame 25 is not moving in the lateral direction, and the rod 357 is actuated by the operation of the actuator 35. When the movement moves, the convex portion 307 pushes the side frame 13m through the concave member 309, so that the moving frame 25 moves in the trunk axis direction by the reaction.

  The concave member 309 is engaged with the convex portion 307 only when the moving frame 25 is not laterally moved, and the actuators 30 and 35 are operated so that the moving frame 25 is indicated by a two-dot chain line in FIG. When the moving frame 25 moves in the direction indicated by the reference numeral 25 'and moves in the direction of the arrow shown in FIG. 7 (the X direction in FIG. 2), the convex portion 307 can be moved without any trouble.

  A moving frame positioning shaft 33 is fixed to the moving frame 25. The end of the positioning shaft 33 protrudes from the moving frame 25, and the tip is tapered. A tapered positioning hole 34 is formed in the side frame 13m, and the position of the moving frame 25 in the printing operation state can be accurately determined by engaging the positioning shaft 33 with the positioning hole 34. It is like that. Although not shown, the rotation center shafts 82 and 92 of the support arms 81 and 91 of the printing cylinders 8 and 9 similarly penetrate the moving frame 25 and protrude to the side frame 13m side, and the tips thereof are formed in a tapered shape. ing. In the printing operation state, the distal end portions of the rotation center shafts 82 and 92 are also fitted into tapered positioning holes on the side frame 13m side (not shown).

  In the rotary printing press of this embodiment, when changing the diameters of the printing cylinders 8 and 9, first, the axial movement actuators 30 and 35 are operated, and the axial movement device (axial movement actuators 30, 35, shaft The moving frame 25 is moved to the two-dot chain line position (position indicated by reference numeral 25 ') shown in FIG. At this time, there is no moving frame 25 to be removed with the support arms 81, 91, the rotation actuators 83, 93, and other adjustment mechanisms (not shown) attached, and the support arms 81, 91 are removed from the bearings 84, 94 of the printing cylinders 8, 9. Just remove it from Removal of the support arms 81 and 91 from the bearings 84 and 94 is easy. That is, the support arms 81 and 91 slide in the cylinder axis direction between the bearing holes 811 and 911 (shown in FIG. 10) and the outer periphery of the bearings 84 and 94, and the printing cylinders 8 and 9 are on the drive side side frame 13d side. Therefore, the support arms 81 and 91 can be easily removed from the bearings 84 and 94 simply by moving the moving frame 25 in the barrel axis direction.

  After the moving frame 25 is moved in the position indicated by reference numeral 25 ', that is, in the trunk axis direction, the lateral movement actuator 31 is operated to move the lateral movement mechanism (lateral movement actuator 31, lateral movement bracket 27, lateral direction). 2), the moving frame 25 is moved to the position indicated by a two-dot chain line (position indicated by reference numeral 25 ″) in FIG. 2. At this time, the position of the moving frame 25 in the barrel axis direction is indicated by reference numeral 25 shown in FIG. In this state, as shown in FIG. 8, since there is no obstacle in front of the removal hole 131 of the side frame 13m, the sleeves 801 and 901 of the printing cylinders 8 and 9 are pulled out. After the sleeves 801 and 901 are replaced, the printing frame is again printed by returning the moving frame 25 to the original position in the reverse order. Can be the state. At this time, the position of the mobile frame 25 with high precision is restored by positioning shaft 33 is fitted into the positioning hole 34.

As described above, according to the rotary printing press of the present embodiment, the printing cylinder can be extracted only by moving the moving frame in two stages. In other words, the number of processes required to change the diameter of the printing cylinders 8 and 9 is very small and can be performed automatically. Therefore, the printing cylinder can be replaced in a short time with a small amount of labor, greatly increasing productivity. Can be improved.
Further, the position of the moving frame 25 can be accurately restored by positioning with the positioning shaft 33 and the positioning hole 34. Furthermore, since the rotation center shafts 82 and 92 of the printing cylinder support arms 81 and 91 are fitted in the tapered holes of the side frame 13m, the restoring position accuracy of the printing heart is high, and the printing quality can be maintained high. it can.

  In addition, according to the rotary printing press of this embodiment, since the printing cylinders 8 and 9 are integrated with the shaft and the main body, both ends of the main body are supported, and the support arms 81, 91, 85, and 95 are supported. Such a bending moment can be reduced as compared with the case where the barrel and the shaft are separate from each other, and there is an advantage that the support arms 81, 91, 85, and 95 can be reduced in size.

(B) Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. In the figure, the same reference numerals are assigned to the same positions and members as those in the first embodiment.

  This embodiment is different from the first embodiment in the structure for supporting the moving frame from the side frame. That is, as shown in FIGS. 11 and 12, an axial linear motion bearing 28k is provided on a fixed bracket 26k fixed to the side frame 13m, and an axially movable bracket 49 is supported via the axial linear motion bearing 28k. Has been. The moving frame 25k is supported by the axially moving bracket 49 via a laterally linear bearing 29k. The side frame 13m and the axial movement bracket 49 are connected by an axial movement actuator 30k, and the axial movement bracket 49 and the movement frame 25k are connected by a lateral movement actuator 31k. Accordingly, the moving frame 25k can move in the axial direction together with the axial moving bracket 49 by the operation of the axial movement actuator 30k, and the moving frame 25k can move in the horizontal direction by the operation of the horizontal movement actuator 31k.

  In the first embodiment, the moving frame 25 is supported so as to be movable in the axial direction by the laterally moving bracket 27 supported by the side frame 13m, whereas in the present embodiment, the axial moving bracket 49 is provided as described above. The moving frame 25k is supported by the side frame 13m and supported by the axial moving bracket 49 so as to be movable in the lateral direction. Thereby, in addition to the effect similar to 1st Embodiment, the effect that the apparatus selection freedom degree of the axial direction movement actuator 30k becomes large and it becomes easy to design is also acquired.

(C) Third Embodiment A third embodiment of the present invention will be described with reference to FIG. In the figure, the same reference numerals are assigned to the same positions and members as those in the first embodiment.
This embodiment is different from the first embodiment in the structure of the lateral movement bracket. That is, in the first embodiment, the lateral movement brackets 27a and 27b are vertically separated, but in the present embodiment, as shown in FIG. 13, the upper and lower lateral movement brackets 27a and 27b are coupled by the coupling member 27c. However, it is integrated as one lateral movement bracket 27k. Thereby, in addition to the effect similar to 1st Embodiment, the effect that the connection member 27c can serve as a cover, the effect that the horizontal movement actuator 31 can be made only in one place of the lower part, and support rigidity Thus, it is possible to obtain an effect that the support arms 81 and 91 and the bearings 84 and 94 (see FIG. 2) at the time of restoration are easily fitted.

(D) Fourth Embodiment A fourth embodiment of the present invention will be described with reference to FIGS. In the figure, the same reference numerals are assigned to the same positions and members as those in the first embodiment.
In the present embodiment, a measure against an excessive load applied to the drive-side bearings 86 and 96 when the printing cylinders 8 and 9 are replaced is added to the configuration of the first embodiment. That is, as shown in FIG. 10, the operation side bearings 84 and 94 of the printing cylinders 8 and 9 are supported by the support arms 81 and 91 provided outside the moving frame 25, but the sleeves 801 and 901 are replaced. Sometimes, the support arms 81 and 91 are removed from the bearings 84 and 94 by the movement of the moving frame 25 in the trunk axis direction. For this reason, the printing cylinders 8 and 9 are supported only by the drive side bearings 86 and 96. At this time, the bearings 86 and 96 are excessively large according to the weight of the printing cylinders 8 and 9 due to the principle of the lever. A heavy load is applied. Therefore, in this embodiment, as shown in FIG. 14, the shafts 802 and 902 of the printing cylinders 8 and 9 are extended further outward than the drive gear 35 outside the bearings 86 and 96, and the shaft end portion at the tip thereof A pressure receiving member 37 is provided at 803 and 903, and the pressure receiving member 37 is pressed downward by a pressing member 38.

  FIG. 18 schematically shows the balance of force at this time. When the printing cylinder side of the bearings 86 and 96 is used as a fulcrum, if there is no pressing force R2, the bearing 86, Although the moment due to the reaction force R1 acting on the drive gear side of 96 is balanced with the moment due to the weight W of the printing cylinders 8 and 9, the reaction force R1 acting on the drive gear side of the bearings 86 and 96 is Since the distance is extremely short, the distance becomes excessive, and an excessive reaction force R0 corresponding to the sum of the excessive reaction force R1 and the weight W of the printing cylinders 8 and 9 acts on the fulcrum. On the other hand, when the shafts 802 and 902 are pressed downward on the outside of the bearings 86 and 96 as in the present embodiment, the drive gears of the bearings 86 and 96 according to the magnitude of the moment due to the pressing force R2. The reaction force R1 acting on the side becomes small. Further, if the moment acting on the fulcrum is the same, the applied pressing force R2 may be smaller as the distance L from the fulcrum is larger. Accordingly, a reaction force R0 corresponding to the sum of the weight W of the printing cylinders 8 and 9, the reaction force R1, and the pressing force R2 acts as a load on the fulcrum, and this reaction force R0 acts on the fulcrum from the pressing force R2. The larger the distance L to the point to be made, the smaller it can be made.

Specific configurations of the pressing device that applies the pressing force and the pressure receiving member that receives the pressing force are shown in FIGS. First, the pressure receiving member 37 has a circular inner peripheral portion, and is slidably engaged with the shaft end portions 803 and 903. Further, the outer peripheral portion is formed in a polygon having a plurality of planes (hexagon in the figure), and is in surface contact with a pressing surface 38c of a pressing member 38 described later.
As shown in FIG. 15, the pressing device 39 is supported by the intermediate frame 36. The intermediate frame 36 is fixed to the drive side frame 13d having high rigidity as shown in FIG. As shown in FIG. 15 or FIG. 16, a bracket 40 is fixed to the intermediate frame 36, and a moving pedestal 42 is provided on the bracket 40 via a linear motion bearing 41. The moving pedestal 42 is movable by a moving actuator 43 having a main body supported by the bracket 40.

  A pressing mechanism is incorporated in the moving base 42. More specifically, a shaft 46 is fixed to the movable pedestal 42, and a lever 45 is rotatably supported on the shaft 46. The lever 45 includes an eccentric part 45e eccentrically fitted to the shaft 46 and a lever part 45r attached to the end of the eccentric part 45e. The eccentric portion 45e has a circular shaft on the outer periphery, and the pressing member 38 is rotatably supported by the eccentric portion 45e. The pressing member 38 is disposed in a receiving portion 47e formed in an inverted L shape at the lower end portion of the moving pedestal 42, and moves in the receiving portion 47e according to the rotation of the lever 45. The pressing member 38 has a quadrangular outer shape with corners cut off, and one side 38g of the pressing member 38 hits the wall surface 47g of the housing portion 47e when moving inside the housing portion 47e. Thereby, the rotational movement of the pressing member 38 is restricted, and the pressing member 38 moves in the vertical direction along the wall surface 47g according to the amount of eccentricity of the eccentric portion 45e with respect to the shaft 46. Since the pressing member 38 moves slightly in the left-right direction when moving up and down, a margin is provided between the side surface 38 g of the pressing member 38 and the wall surface 47 g of the moving base 42.

  The lever 45 is rotated by actuating the pressing actuator 44. In the pressing actuator 44, the tip of the rod is connected to the moving base 42, and the tip of the lever portion 45r of the lever 45 is connected to the cylinder of the pressing actuator 44. Thereby, by operating the actuator 44, the lever 45 rotates, and the pressing member 38 moves up and down. The side end of the lever 45 on the pressing side (the side on which the pressing member 38 descends) comes into contact with a stopper 47 fixed to the moving base 42, and an adjustment screw 48 is provided on the stopper corresponding portion of the lever 45. It has been. Although the rotation of the lever 45 is restricted by the stopper 47, the rotation position of the lever 45 can be adjusted by adjusting the amount of the adjustment screw 48, and the pressing position (lower limit position) of the pressing member 38 can be finely adjusted. It is like that.

  As shown in FIG. 17, the pressing surface 38 c on the lower surface of the pressing member 38 is a pressing device using a moving actuator 43 in a plane perpendicular to the axis of the printing cylinders 8 and 9 by the angle θ with respect to the pressing direction. It forms so that it may incline toward the extrusion direction of 39. Thus, when the pressing device 39 is pushed out from the retracted position (the state where the cylinder of the moving actuator 43 is not pushed out) to the pressing position, the pressing member 38 comes into contact with the outer peripheral portion of the pressure receiving member 37 and the pressure receiving member 37 is moved. The pressing surface 38c of the pressing member 38 and any flat surface of the pressure receiving member 37 are in contact with each other.

  When the pressing surface 38 c is pressed against the pressure receiving member 37, a vertically downward force Pv and a horizontal force Ph act on the shaft end portions 803 and 903 of the printing cylinders 8 and 9. In the direction in which the horizontal force Ph acts, a stopper 50 is disposed close to the shaft end portions 803 and 903 (a little gap δ away). The stopper 50 is fixed to the side frame 13d. When the pressure receiving member 37 is pressed by the pressing device 39, if there is no restriction in the horizontal direction, the printing cylinders 8 and 9 try to shift laterally around the bearings 86 and 96 as indicated by a two-dot chain line in FIG. However, as described above, the horizontal component Ph is applied to the pressing force, and the stopper 50 is provided in the direction of the horizontal component Ph, so that the movement of the shaft end portions 803 and 903 in the horizontal direction is stopped by the stopper 50. The printing cylinders 8 and 9 can be stopped with a slight displacement.

Thus, according to the present embodiment, in addition to the same effects as those of the first embodiment, the reaction force acting on the drive-side bearings 86 and 96 when the sleeves 801 and 901 are replaced can be reduced. While maintaining the high precision and long life of the member, there are the effects that the component member can be made small and the member cost and space can be saved.
In addition, since the pressing device 39 that applies the pressing force R2 to the shafts 802 and 902 of the printing cylinders 8 and 9 is supported from the intermediate frame 36 using the driving side frame 13d having high rigidity as the supporting base, the pressing rigidity is increased. The position accuracy at the time of pressing can be increased. Further, since the contact between the pressing member 38 and the pressure receiving member 37 is a surface contact, the pressing position is stable and the member has a long life. Furthermore, since the pressing device 39 is outside the side frame 13d, there is no adhesion of ink or the like, and it is possible to always maintain good accuracy. With these effects, the positions of the operation side bearings 84 and 94 can be stabilized when the sleeves 801 and 901 are replaced. Therefore, the operation of restoring the moving frame 25 can be performed smoothly, and the work efficiency can be improved. There is also an effect that can be done.

  Further, when the pressing surface 38c of the pressing member 38 is slightly inclined and presses the printing cylinders 8 and 9, pressing is performed in the lateral direction, and the stopper 50 is disposed slightly apart in the lateral direction in which the printing cylinders 8 and 9 are pressed. Therefore, even if the printing cylinders 8 and 9 are laterally displaced, the lateral displacement is stopped at a slight position. In other words, the position in the lateral direction can be determined with high accuracy, and when removing the sleeves 801 and 901 from the removal hole 131 on the operation side, there is an effect that the work can be performed with a stable gap.

(E) Others While some of the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications may be made without departing from the spirit of the present invention. Can do. For example, in the embodiment, the moving frame is moved in the horizontal direction (horizontal direction), but the moving direction is not limited as long as the moving frame is slid relative to the side frame.

  Further, the structure for reducing the load acting on the bearing described in the fourth embodiment is a technology having versatility that is not limited to application to the rotary printing press of the present invention. That is, the present invention can be applied to all printing machines in which a heavy cylinder such as a printing cylinder or its shaft is supported only by a bearing on one side.

It is a schematic diagram which shows the structure inside the printing unit which concerns on 1st Embodiment of this invention. FIG. 2 is a detailed side view of the printing unit of FIG. 1. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is the IV-IV arrow line view (partial sectional drawing) of FIG. FIG. 3 is a DD arrow view of FIG. 2. FIG. 3 is a view in the direction of arrow E in FIG. 2. FIG. 3 is a view in the direction of arrow F in FIG. 2. FIG. 3 is a diagram illustrating a state in which a moving frame is slid in FIG. 2. It is a figure which shows the positional relationship of the hole of a moving frame, and a support arm. It is a figure which shows the operation side edge part of the printing cylinder of FIG. 3 in detail. It is a side view of the printing unit which concerns on 2nd Embodiment of this invention. It is a XII-XII arrow line view of FIG. It is a partial front view of the printing unit which concerns on 3rd Embodiment of this invention. It is sectional drawing of the principal part of the printing unit which concerns on 4th Embodiment of this invention. It is a figure which shows the structure of the press apparatus which concerns on 4th Embodiment of this invention. It is a XVI direction arrow line view of FIG. FIG. 16 is a detailed view of a part XVII in FIG. 15. It is a schematic diagram which shows the balance state of the force which acts on the axis | shaft at the time of replacement | exchange of a printing cylinder. It is a schematic diagram which shows the lateral deviation state of the printing cylinder at the time of replacement | exchange of a printing cylinder. It is a schematic diagram which shows an example of a structure of a rotary printing press. It is a schematic diagram which shows an example of the general printing unit provided in a rotary printing press. It is a figure which shows the structure of the rotary printing machine of patent document 1. FIG. It is a figure which shows the structure of the support mechanism of the printing cylinder of patent document 1. FIG. It is a figure which shows the structure of the rotary printing machine of patent document 2. FIG. 10 is a cross-sectional view illustrating a configuration of a support mechanism for a printing cylinder of Patent Document 1. FIG. 10 is an exploded view showing a configuration of a support mechanism for a printing cylinder of Patent Document 2. FIG.

Explanation of symbols

8, 8a, 8b Plate cylinder 9, 9a, 9b Blanket cylinder 13m, 13d Side frame 131 Removal hole 25, 25k Moving frame 26, 26k Fixed bracket 27, 27k Lateral moving bracket 28, 28k Axial linear motion bearing 29, 29k Lateral linear motion bearing 30, 30k, 35 Axial movement actuator 31, 31k Lateral movement actuator 32 Engaging member 33 Positioning shaft 34 Positioning hole 35 Drive gear 36 Intermediate frame 37 Pressure receiving member 38 Pressing member 38c Pressing surface 39 Pressing device 40 Bracket 41 Linear motion bearing 42 Moving base 43 Moving actuator 44 Pressing actuator 45 Lever 46 Axis 47 Stopper 48 Adjustment screw 49 Axial moving bracket 50 Stopper 81, 91 Operation side support arm 82 , 92 Shaft 83, 93 Rotating actuator 84, 94 Operation side bearing 95, 95 Drive side support arm 86, 96 Drive side bearing 801, 901 Sleeve 802, 902 Shaft 803, 903 Drive side shaft end

Claims (4)

A first support device for supporting one axial end of the printing cylinder;
A second support device for supporting the other shaft end of the printing cylinder;
A pressure receiving portion rotatably provided on a shaft of the printing cylinder extending outward from a support position by the second support device;
A pressing member that presses the pressure receiving portion downward;
A moving device that pushes and moves the pressing member from a retracted position that does not contact the outer periphery of the pressure receiving unit to a pressing operation position that contacts the outer periphery of the pressure receiving unit;
In the vicinity of the other shaft end portion of the printing cylinder, the stopper is disposed closer to the pushing direction of the moving device than the shaft, and includes a stopper that contacts the shaft when pressed by the pressing member. Rotary printing press. 2. The rotary printing press according to claim 1, wherein the pressure receiving portion has an outer peripheral portion formed by a plurality of planes. The pressing member has a pressing surface in contact with the outer periphery of the pressure receiving portion,
The perpendicular line of the pressing surface is slightly inclined toward the pushing direction of the moving device in a plane perpendicular to the axis of the printing cylinder with respect to the pressing direction of the pressing member. A rotary printing machine according to 1 or 2. The rotary press according to claim 3, wherein the pressing surface is flat.

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