JP5946388B2 - Printing apparatus and plate cylinder replacement method thereof - Google Patents

Description

  The present invention relates to a printing apparatus that includes a printing unit having a plate cylinder that is rotatably supported, and that prints by transferring ink that adheres to the outer peripheral surface of the plate cylinder onto a printing material, and a method for replacing the printing cylinder.

  Conventionally, a general printing apparatus rotates ink that adheres to the outer peripheral surface of a plate cylinder in a state in which the plate cylinder rotatably supported by a printing unit is aligned with a printing material (hereinafter referred to as registration). Is transferred to a printing material and printed.

  The plate cylinder is provided with a key groove into which a key on the unit fixing side of the printing unit is inserted. When the plate cylinder is replaced, the key is inserted into the key groove to replace the plate cylinder and the printing cylinder. The unit is positioned with respect to the unit fixing side, and the plate cylinder is attached to the unit fixing side of the printing unit.

  By the way, recent printing apparatuses are required to be efficient so that the setup time before printing can be shortened as much as possible. For example, the printing apparatus of Patent Document 1 is provided with a pallet that carries the plate cylinder into and out of the printing unit, and the printing unit delivers the plate cylinder between the unit fixing side and the pallet. A plate cylinder delivery mechanism for performing the above and a key groove position detection mechanism for detecting the position of the key groove are provided. The plate cylinder delivery mechanism is configured to mount the plate cylinder so as to be rotatable around an axis, and in the middle of delivering the plate cylinder from the pallet to the unit fixing side of the printing unit. Based on the detected key groove position data, the plate cylinder is rotated so that the key groove corresponds to the key, and the plate cylinder is loaded on the pallet and transferred to the printing unit. Can be installed automatically.

  However, in Patent Document 1, after the plate cylinder is attached to the unit fixing side of the printing unit, the position of the mark as the reference position of the printed pattern formed on the outer peripheral surface of the plate cylinder is not known. It is necessary for a person to manually register the plate cylinder, which is complicated.

  In order to cope with this, the printing apparatus of Patent Document 2 is provided with a mark position detection mechanism for detecting the position of the mark. After the plate cylinder is attached to the unit fixing side of the printing unit, the mark position detection mechanism is used. The position of the mark with respect to the keyway position is detected, and then the rotation angle for aligning the printing unit is calculated based on the detected mark position and size data such as the plate cylinder diameter under the control of the control device. ing.

JP-A-8-108517 (paragraphs 0015 to 0018, FIG. 1) JP 2003-266645 A (paragraphs 0026 to 0029, FIG. 3)

  However, in Patent Document 2, after attaching the plate cylinder to the printing unit, the operation of detecting the position of the mark, the operation of calculating the rotation angle for registering the printing unit, and the rotation angle of the plate cylinder are described above. Therefore, even if the plate cylinder is attached to the printing unit, the printing operation cannot be performed immediately, and the time for stopping the printing apparatus becomes longer and the efficiency is poor.

  The present invention has been made in view of such a point, and an object of the present invention is to provide an efficient printing apparatus and a plate cylinder replacement method thereof with a short stop time of the printing apparatus during plate cylinder replacement. .

  In order to achieve the above object, the present invention is characterized in that a mark provided on the outer peripheral surface of the plate cylinder is set at a predetermined position in a carriage for carrying in and out the plate cylinder.

  That is, in the first invention, a printing cylinder having a key groove is positioned by inserting a key on the unit fixing side into the key groove, and is supported rotatably on the unit fixing side. A carriage for carrying the plate cylinder in and out, and a control means connected to the printing unit for controlling the rotation operation of the plate cylinder, the printing unit being capable of rotating the plate cylinder about an axis. A plate cylinder transfer means for transferring and transferring the plate cylinder between the unit fixing side and the carriage; and a key groove position detection means for detecting a key groove position in the plate cylinder. Is marked with a mark for matching a printed pattern, and the carriage has mark positioning means for mounting the plate cylinder so that the mark is in a predetermined position, and the control means On board The mark for the keyway in the plate cylinder based on the storage unit storing the mark position data of the plate cylinder, the keyway position detected by the keyway position detecting means, and the mark position data stored in the storage unit A calculation unit for calculating the position of the printing unit, and the plate cylinder delivery means is controlled to rotate the plate cylinder so that the keyway corresponds to the key so that the printing cylinder can be rotated to the unit fixing side of the printing unit. It is comprised so that it may support.

In a second invention, in the first invention, a plurality of the printing units are arranged side by side, the carriage is provided in each printing unit, and the mark marked on the plate cylinder is a reference mark, The storage unit stores a distance L between the transfer positions of the two printing units to the printing material of the two printing units and a radius r of the plate cylinder, and the calculation unit includes the printing unit of the printing units. In the upstream printing cylinder and the downstream printing cylinder of the two printing units, angles θ ₁ and θ ₂ around the axis between the keyway and the reference mark are respectively calculated, and the upstream printing cylinder with respect to the upstream printing cylinder The rotation angle θ ₃ for registering the downstream plate cylinder is expressed by the following equation (1)
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r (n is an integer) (1)
The control means is configured to control the plate cylinder delivery means to rotate the downstream plate cylinder by the rotation angle θ ₃ with respect to the upstream plate cylinder. .

  According to a third aspect, in the second aspect, the carriage has a lower end supported so as to be swingable in the vertical direction, and the upper end comes into contact with an outer peripheral surface corresponding to the reference mark of the plate cylinder on which the carriage is mounted by a tilting operation. It has a bar.

  In a fourth invention, in the second or third invention, the carriage carries the plate cylinder into and out of the lower part of each printing unit, and the plate cylinder delivery means supports the plate cylinder from below. An elevator unit that moves up and down, and transfers the plate cylinder to and from the carriage at the lower end position of the elevator unit, while at the upper end position of the elevator unit between the unit fixing side of each printing unit. The plate cylinder is configured to deliver the plate cylinder.

  According to a fifth invention, in the fourth invention, the elevating part is located below the plate cylinder mounted on the carriage in a state where the carriage is carried into each printing unit, and the plate cylinder is moved when the carriage is raised. While being received and raised from the carriage, the plate cylinder received from the unit fixing side of each printing unit when lowered is delivered to the carriage.

  According to a sixth aspect, in the fourth or fifth aspect, the keyway position detecting means includes a non-contact sensor that detects the keyway from one side in the axial direction of the plate cylinder, and a rotation angle of the plate cylinder. A rotation angle detection unit for detecting the rotation of the plate cylinder from the state where the reference mark is in the predetermined position until the non-contact sensor detects the keyway, and rotating the plate cylinder around the axis. The position of the keyway with respect to the reference mark is detected by detecting a rotation angle with an angle detection unit.

In a seventh invention, in the first invention, a plurality of the printing units are arranged in parallel, the carriage is provided in each printing unit, and the mark marked on the plate cylinder is used to match a printing pattern. Is a temporary reference mark marked at a position that is increased or decreased by a predetermined angle as it goes from the upstream plate cylinder to the downstream plate cylinder of the printing units arranged side by side, The storage unit stores a distance L between the transfer positions of the two printing units to the printing material of the two printing units and a radius r of the plate cylinder, and the calculation unit includes the printing unit of the printing units. In the upstream plate cylinder and the downstream plate cylinder of the two printing units, angles θ ₁ and θ ₂ around the axis between the keyway and the temporary reference mark are respectively calculated, and the upstream plate cylinder Against the downstream plate cylinder The rotation angle θ ₃ for registering is expressed by the following equation (1)
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r + θ _α (n is an integer) (1)
The control means is configured to control the plate cylinder delivery means to rotate the downstream plate cylinder by the rotation angle θ ₃ with respect to the upstream plate cylinder. .

  According to an eighth aspect, in the seventh aspect, the carriage has a lower end supported so as to be swingable in the vertical direction, and the upper end contacts the outer peripheral surface corresponding to the temporary reference mark of the plate cylinder on which the carriage is mounted by a tilting operation. It is characterized by having a bar.

  According to a ninth invention, in the seventh or eighth invention, the carriage carries the plate cylinder into and out of the lower part of each printing unit, and the plate cylinder delivery means supports the plate cylinder from below. An elevator unit that moves up and down, and transfers the plate cylinder to and from the carriage at the lower end position of the elevator unit, while at the upper end position of the elevator unit between the unit fixing side of each printing unit. The plate cylinder is configured to deliver the plate cylinder.

  According to a tenth aspect, in the ninth aspect, the elevating part is located below the plate cylinder mounted on the carriage in a state where the carriage is carried into each printing unit, and the plate cylinder is moved when the carriage is raised. While being received and raised from the carriage, the plate cylinder received from the unit fixing side of each printing unit when lowered is delivered to the carriage.

  In an eleventh aspect, in the ninth or tenth aspect, the keyway position detection means includes a non-contact sensor that detects the keyway from one side in the axial direction of the plate cylinder, and a rotation angle of the plate cylinder. A rotation angle detection unit for detecting the rotation of the plate cylinder from the state in which the temporary reference mark is in the predetermined position until the non-contact sensor detects the key groove, and rotating the plate cylinder around an axis. The position of the key groove with respect to the temporary reference mark is detected by detecting the rotation angle with a rotation angle detection unit.

  In a twelfth aspect of the invention according to the sixth or eleventh aspect of the invention, the non-contact sensor is arranged in the middle in the vertical direction of the printing unit and on the side of the printing unit.

  In a thirteenth aspect of the invention, in any one of the first to twelfth aspects of the invention, on the unit fixing side of each printing unit, the plate cylinder is engaged with both ends in the axial direction of the plate cylinder in the advanced state. A pair of support shafts that are separated from both end portions in the axial direction of the plate cylinder in the retracted state and are removed from the unit fixing side of each printing unit are located at both end portions in the axial direction of the plate cylinder. A cylindrical cover that is disposed so as to be capable of advancing and retreating and that surrounds each of the support shafts is provided to each of the support shafts, and when the support shaft is retracted in a state of being engaged with an axial end of the plate cylinder, An end portion in the axial direction of the plate cylinder is brought into contact with the tip end of the cylindrical cover so that the engagement with the end portion in the axial direction of the plate cylinder is released.

  According to a fourteenth aspect, in the thirteenth aspect, the cylindrical cover is configured to be adjustable in length in the axial direction of the plate cylinder.

  In a fifteenth aspect of the invention, in any one of the first to fourteenth aspects, the carriage moves the carriage that has entered from the side below the plate cylinder attachment position of the printing unit by a linkage operation with the unit fixing side. A carriage positioning means for positioning so as not to move below the plate cylinder attachment position, and a carriage movable in the forward and backward direction of the carriage, and when the carriage enters the plate cylinder attachment position below, the plate cylinder on the carriage is printed Plate cylinder positioning means for positioning various plate cylinders having different lengths by contacting the end portions of the plate cylinder so as to be attachable to the unit is provided.

  According to a sixteenth aspect, in the fifteenth aspect, the carriage includes a main body frame forming a skeleton of the carriage, and a slide frame provided on the upper portion of the main body frame so as to be slidable in the forward and backward direction of the carriage and mounting the plate cylinder. The plate cylinder positioning by the plate cylinder positioning means is performed corresponding to a state in which the slide frame is slid in the carriage entering direction with respect to the main body frame.

  According to a seventeenth aspect, in the fifteenth or sixteenth aspect, the plate cylinder positioning means extends along the carriage advancing / retreating direction, and is marked at a position corresponding to an end of various plate cylinders to be mounted. A mark member, a slider that can slide along the mark member, and a positioning plate that is provided on the slider and contacts an end of the plate cylinder when the plate cylinder is mounted. And

  According to an eighteenth aspect, in the seventeenth aspect, the positioning plate is pivotally urged upward by a plate urging member and one end thereof is pivotally supported by the slider.

  According to a nineteenth aspect, in any one of the fifteenth to eighteenth aspects, the linking operation between the carriage positioning means and the unit fixing side is an engagement operation.

In a twentieth invention, in the nineteenth invention, the engaging operation is provided on one of the carriage positioning means and the unit fixing side, and the hook is urged to rotate by a hook urging member;
Provided on the other of the carriage positioning means and the unit fixing side, the hook is pressed by an approaching operation of the carriage below the plate cylinder mounting position, and the hook rotates against the urging force of the hook urging member. It is performed by the engaged member which moves and engages.

  In the twenty-first aspect, the plate cylinder is mounted on the carriage so that the mark for aligning the printed pattern is in a predetermined position, and then the plate cylinder rotatably supported by the printing unit is removed from the printing unit. After removing the carriage, the carriage is carried into the printing unit. After that, the plate cylinder is transferred from the carriage to the unit fixing side of the printing unit by the printing cylinder delivery means. And the angle around the axis between the key groove position of the plate cylinder and the mark based on the size data of the plate cylinder and the mark position data of the plate cylinder mounted on the carriage by the control means After that, the plate cylinder is rotated by the plate cylinder delivery means so that the key groove corresponds to the key on the unit fixing side of the printing unit, and the key is inserted into the key groove. Above version And the positioning, characterized in that for rotatably supported on the unit fixing side of the upper printing units the plate cylinder.

In a twenty-second aspect, in the twenty-first aspect, the mark marked on the plate cylinder is a reference mark, and a plurality of plates are mounted on the carriage so that the reference mark is in a predetermined position. The carriage is put on standby for each printing unit, and the control means transfers the distance L between the transfer positions of the two printing units to the printing material of the printing units, the radius r of the plate cylinder, and the carriage. Based on the reference mark position data of the mounted plate cylinder, the position around the axis between the key groove position and the reference mark in the upstream plate cylinder and the downstream plate cylinder of the two printing units of the above printing units. The angles θ ₁ and θ ₂ are calculated, and the rotation angle θ ₃ for registering the downstream plate cylinder with respect to the upstream plate cylinder is expressed by the following equation (1).
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r (n is an integer) (1)
After the plate cylinder is rotatably supported on the unit fixing side of each printing unit, the downstream plate cylinder is rotated by the rotation angle θ ₃ with respect to the upstream plate cylinder. To do.

In a twenty-third aspect, in the twenty-first aspect, the mark marked on the plate cylinder is downstream from the upstream plate cylinder of the juxtaposed printing unit with respect to a normal reference position for aligning the printed pattern. It is a temporary reference mark marked at a position that is increased or decreased by a predetermined angle as it goes to the side plate cylinder, and the plate cylinder is mounted on the carriage so that the temporary reference mark is at a predetermined position. The carriage is made to wait for each of a plurality of printing units, and the distance L between the transfer positions of the two printing units to the printing material of the printing units, the radius r of the plate cylinder, and the board are mounted by the means. Based on the reference position correction angle θ _α for correcting the downstream plate cylinder to the normal reference position with respect to the upstream plate cylinder in order to match the printed temporary cylinder reference mark position data and the printed pattern, Printing two of the printing units Angle theta ₁ around the axis between the keyway position and the temporary reference mark on the upstream side plate cylinder and the downstream plate cylinder _knit, together with the calculating theta _2, respectively, of the downstream plate cylinder with respect to the upstream plate cylinder The rotation angle θ ₃ for registration is expressed by the following equation (1)
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r + θ _α (n is an integer) (1)
After the plate cylinder is rotatably supported on the unit fixing side of each printing unit, the downstream plate cylinder is rotated by the rotation angle θ ₃ with respect to the upstream plate cylinder. To do.

  In the first and twenty-first inventions, the mark position data necessary to know the position of the mark with respect to the keyway can be obtained in advance with the plate cylinder mounted on the carriage. The stop time of the printing apparatus is shortened and work efficiency is improved.

  In the second, seventh, twenty-second, and twenty-third inventions, the key groove position is detected before the plate cylinder is attached to the unit fixing side of each printing unit, and the key groove position data and the reference mark or temporary reference mark are detected. Since the rotation angle for registering the downstream plate cylinder with respect to the upstream plate cylinder of the printing unit is known from the position data, each plate is immediately installed after the plate cylinder is attached to the unit fixing side of each printing unit. The registration of the torso will be performed automatically. Therefore, the stop time of the printing apparatus when replacing the plate cylinder is shortened, and the working efficiency is further improved.

  In the third and eighth inventions, when the mark positioning means sets the reference mark or the temporary reference mark to a predetermined position, the upper end of the bar indicates the predetermined position of the reference mark or the temporary reference mark on the plate cylinder. Since it becomes a mark to show, it is easy to set the reference mark or the temporary reference mark at a predetermined position. Further, since a mark can be made at a predetermined position of the reference mark or the temporary reference mark on the plate cylinder with a simple structure, a low-cost cart can be achieved.

  In the fourth and ninth inventions, the carriage in a state where the plate cylinder is carried into the printing unit and the plate cylinder attached to the unit fixing side of each printing unit are positioned above and below. The width of each printing unit that intersects the axial direction of the can be reduced. Therefore, the space between the printing units can be narrowed, and a printing apparatus with a compact layout can be obtained.

  In the fifth and tenth aspects of the invention, when the elevating unit is raised, the transfer of the plate cylinder from the carriage to the elevating unit and the movement of the plate cylinder to the mounting position of each printing unit can be performed at one time. By lowering the elevating part, it is possible to move the printing cylinder from the mounting position of each printing unit to the carriage and transfer the printing cylinder from the elevating part to the carriage at a time. It can be done efficiently. In addition, since the lifting part supports the plate cylinder positioned on the carriage from the lower side when it is raised, the lifting part is set at a predetermined position on the carriage when the plate cylinder is transferred from the carriage to the lifting part. The reference mark or temporary reference mark on the plate cylinder does not shift.

  In the sixth and eleventh aspects of the invention, the sensor does not come into contact with the axial direction end of the plate cylinder when detecting the keyway, so that the plate cylinder does not shift in the axial direction at the plate cylinder delivery portion. Therefore, it is possible to prevent an error in attaching each printing unit to the unit fixing side due to the displacement of the plate cylinder in the plate cylinder delivery section. In addition, the structure of the printing unit can be simplified as the sensor does not have a complicated structure as in the case of detecting the position by contacting the keyway with a contact type.

  In the twelfth invention, when detecting the key grooves of different types of plate cylinders, the key grooves of the respective plate cylinders can be detected only by changing the raising / lowering position of the elevating unit while fixing the non-contact sensor. . Therefore, it is possible to detect the key groove positions of the plate cylinders of various sizes using the lifting operation of the lifting unit without complicating the structure of each printing unit.

  In the thirteenth invention, when each support shaft is retracted and the plate cylinder is removed from each printing unit, when one support shaft is detached from the plate cylinder and the other support shaft is caught in the plate cylinder and is not easily removed, the plate Since the cylinder is pulled by the other support shaft, the axial center end abuts against the tip of the cylindrical cover, the plate cylinder does not move thereafter, and only the support shaft moves backward, so the plate cylinder can be easily removed from the printing unit. Can be removed.

  In the fourteenth invention, by adjusting the length of the cylindrical cover, the position of the tip of the cylindrical cover relative to the axial end of the plate cylinder can be changed. Therefore, when the plate cylinder is replaced, the axis of the plate cylinder is changed. Even if the length in the center direction changes, the protruding end of the cylindrical cover can be brought close to the end portion in the axial direction of the plate cylinder accordingly.

  In the fifteenth aspect, since the carriage is advanced and retracted from the side with respect to the lower side of the printing cylinder mounting position of the printing unit, the upstream and downstream spaces in the printing material feeding direction of the printing unit can be used effectively. In addition, the plate cylinder positioning means and the carriage positioning means enable the plate cylinder to be attached to the printing unit simply by entering the carriage below the printing cylinder mounting position of the printing unit. After entering the plate cylinder mounting position below, it moves to the upstream side and downstream side of the printing material feed direction of the printing unit, and it is not necessary to check the position of the plate cylinder with respect to the plate cylinder mounting position, so that the plate cylinder can be replaced. Simple.

  In the sixteenth invention, when the slide frame is slid in the carriage entry direction with respect to the main body frame, the plate cylinder becomes a position where the carriage can be attached to the printing unit in a state where the carriage is entered below the plate cylinder attachment position. When the frame is slid with respect to the main body frame in the backward direction of the carriage, the overall length of the carriage is shortened and becomes compact, so that a small turn is effective when transporting the plate cylinder by the carriage, and the operator's operation of the carriage becomes easy. .

  In the seventeenth aspect, the positioning plate can be easily moved to the marks corresponding to the end portions of the various plate cylinders by the sliding operation of the slider, and the setup time for exchanging the plate cylinders can be shortened.

  In the eighteenth aspect of the invention, when the plate cylinder is placed on the carriage, even if the plate cylinder suddenly comes into contact with the positioning plate from above, the positioning plate is moved downward against the urging force of the plate urging member. Since it rotates, it is possible to prevent a failure of the positioning plate when the plate cylinder comes into contact with the positioning plate from above.

  In the nineteenth invention, when the carriage is entered from the side below the plate cylinder mounting position, the carriage positioning means and the unit fixing side are engaged with each other by the engaging operation, so that the carriage can be firmly fixed to the unit fixing side.

  In the twentieth invention, when the carriage enters the printing unit, the hook is automatically engaged with the engaged member and the carriage is fixed to the unit fixing side, so that the operator enters the carriage into the printing unit. Apart from the work, there is no need to perform troublesome work such as fixing the carriage to the printing unit, and the carriage can be easily fixed to the unit fixing side.

1 is a schematic configuration diagram of a printing apparatus according to a first embodiment. It is a schematic block diagram of a printing unit. It is sectional drawing in the AA of FIG. FIG. 4 is an enlarged cross-sectional view around a support axis along line BB in FIG. 3, (a) shows a state in which the cylindrical cover is extended, and (b) shows a state in which the cylindrical cover is contracted. It is a top view which shows the trolley | bogie in the state which slid the slide frame ahead of the trolley | bogie. It is a top view which shows the trolley | bogie in the state which made the slide frame slide to the trolley back. (A) is a C arrow view of FIG. 5, (b) is a D arrow view of FIG. 6, (c) is sectional drawing in the EE line | wire of (a). 6A and 6B are cross-sectional views taken along line FF in FIG. 5, where FIG. 5A shows a positioning plate in a normal state, and FIG. It is the G section enlarged view of FIG. 1 is a block diagram illustrating a configuration of a printing apparatus. It is a figure which shows the state in the middle of carrying the trolley | bogie in the printing unit. It is a figure which shows the state in which the position of the trolley | bogie was decided with respect to the printing unit. It is a figure which shows the state just before delivering a plate cylinder from a trolley to a printing unit. It is a figure which shows the state in the middle of delivering the printing cylinder from the trolley | bogie to the unit fixed side of a printing unit. It is a figure which shows the state immediately after delivering a printing cylinder to the unit fixed side of a printing unit from a trolley. It is the schematic which showed delivery of the printing cylinder between a trolley | bogie and a printing unit, (a) is the state which set the temporary reference mark of the printing cylinder on the trolley in the predetermined position, (b) is (C) shows the state immediately before detecting the key groove position of the plate cylinder, and (d) shows the state where the key groove position of the plate cylinder is detected. , (E) shows a state in which the key cylinder position of the plate cylinder is rotated so as to be positioned at the upper end of the plate cylinder, and (f) shows a state immediately before the plate cylinder is transferred to the unit fixing side of the printing unit. (G) shows the state immediately after delivering the plate cylinder to the unit fixing side of the printing unit. FIG. 4 is a schematic diagram illustrating a state immediately before performing registration of the printing apparatus, and illustrates a positional relationship between each component of two upstream printing units. FIG. 3 is a schematic diagram illustrating a state immediately before performing registration of the printing apparatus, and illustrates a positional relationship between each component of two downstream printing units. It is the schematic which shows the state immediately after performing the registration of a printing apparatus. FIG. 3 is a diagram corresponding to FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.
Embodiment 1 of the Invention
FIG. 1 shows a printing apparatus 1 according to Embodiment 1 of the present invention. The printing apparatus 1 includes a printing unit 2 that rotatably supports a plate cylinder 31 that transfers ink to a printing material W such as a plastic film, and a carriage that carries the plate cylinder 31 in and out of the lower part of the printing unit 2. 5 (see FIG. 2 and FIG. 3), and the three printing units 2 are arranged in parallel.

  A feeding roll 10a for feeding out the printing material W is provided on the upper left side of the paper surface of FIG. 1, while a winding roll 10b for winding up the printing material W is provided on the upper right side of the paper surface of FIG. . A plurality of guide rolls 11 are provided between the feed roll 10a and the take-up roll 10b, and the printing material W is wound around the guide rolls 11 to connect the printing units 2 to each other. It is sent while passing. A dryer 10c for drying the printing material W that has passed through each printing unit 2 is provided on the downstream side of each printing unit 2 in the feeding direction of the printing material.

  As shown in FIG. 2, each printing unit 2 includes a pair of side frames (unit fixing side) 2a extending vertically, and between the side frames 2a, the plate cylinder 31 has an axial center in the horizontal direction. It is supported so as to be able to rotate in a state of being directed.

  At both ends in the axial direction of the plate cylinder 31, concave portions 31a that are recessed in a substantially tapered shape on the inner side in the axial direction are formed, respectively, and a key groove 31b is formed in one of the concave portions 31a. (See FIG. 4).

  Further, at one end in the axial direction of the outer peripheral surface of the plate cylinder 31, the upstream plate cylinder 31 from the upstream plate cylinder 31 of the printing unit 2 arranged side by side with respect to a normal reference position for aligning the print pattern. A register mark (temporary reference mark) 31c serving as a temporary reference is marked so that the position is increased by a predetermined angle as it goes to.

  On the other hand, in the printing unit 2, a support shaft 32a is disposed so as to face both the side frames 2a, and the one support shaft 32a is axially centered on the plate cylinder 31 by a cylinder 32d extending and contracting in a substantially horizontal direction. The other support shaft 32a can be advanced and retracted to the other end side in the axial direction of the plate cylinder 31 by a servo motor driven ball screw mechanism 32e that expands and contracts in a substantially horizontal direction. .

  The front ends of the support shafts 32a are substantially tapered so as to correspond to the recessed portions 31a, and the one support shaft 32a is provided with a key 32b to be inserted into the key groove 31b of the plate cylinder 31. (See FIG. 4).

  The both support shafts 32a engage with and support the plate cylinder 31 in the recessed portion 31a of the plate cylinder 31 in the advanced state, while being separated from the both recessed portions 31a of the plate cylinder 31 in the retracted state. The plate cylinder 31 is removed from the both side frames 2a, and the plate cylinder 31 and the support shaft 32a are configured such that a key 32b provided on one support shaft 32a is inserted into the key groove 31b. They are positioned relative to each other.

  Also, a servo motor-controlled rotation drive unit 32c that rotates the support shaft 32a is provided on the base end side of the one support shaft 32a, and the rotation drive unit 32c rotates the support shaft 32a. Therefore, the plate cylinder 31 is rotated.

  Further, each of the side frames 2a is provided with a cylindrical cover 38 that surrounds each of the support shafts 32a. The cylindrical covers 38 are more than the support shafts 32a in the retracted state, as shown in FIG. It protrudes so as to approach the plate cylinder 31 side.

  The cylindrical cover 38 has an outer cylindrical portion 38a whose proximal end opening periphery is fixed to the side surface of the side frame 2a, and slides toward the axial center end of the plate cylinder 31 with respect to the outer cylindrical portion 38a. A possible inner cylinder part 38b.

  An index plunger 38c is attached to the upper part on the protruding end side of the outer cylinder part 38a so that the pin tip P protrudes inward of the outer cylinder part 38a, and the pin tip P at the lower part on the protruding end side of the outer cylinder part 38a. A through hole 38d is formed at a position opposite to.

  On the other hand, five through holes 38e are formed in the upper part of the inner cylinder part 38b at a predetermined interval in the axial direction of the plate cylinder 31, and the five through holes are formed in the lower part of the inner cylinder part 38b. Five through holes 38f facing each of the holes 38e are formed.

  The cylindrical cover 38 slides the inner cylindrical portion 38b relative to the outer cylindrical portion 38a, and the pin tip P of the index plunger 38c is fitted into a predetermined through hole 38e above the inner cylindrical portion 38b. At the same time, by inserting a pin P1 into the through hole 38d below the outer cylinder part 38a and the through hole 38f below the inner cylinder part 38b corresponding to the through hole 38d, the length of the plate cylinder 31 in the axial direction is increased. It is adjustable. Therefore, when each support shaft 32a is retracted and the plate cylinder 31 is removed from each printing unit 2, one support shaft 32a is detached from the plate cylinder 31, and the other support shaft 32a is caught in the plate cylinder 31 and is not easily removed. Then, the plate cylinder 31 is pulled by the other support shaft 32a, the axial center end abuts against the tip of the cylindrical cover 38, the plate cylinder 31 does not move thereafter, and only the support shaft 32a is retracted. The plate cylinder 31 can be easily removed from the printing unit 2.

  Further, by adjusting the length of the cylindrical cover 38, the position of the tip of the cylindrical cover 38 with respect to the axial center end of the plate cylinder 31 can be changed. Therefore, when the plate cylinder 31 is replaced, the plate cylinder 31 is replaced. Even if the length in the axial direction changes, the protruding end of the cylindrical cover 38 can be brought closer to the axial direction end of the plate cylinder 31 accordingly.

  The cylindrical cover 38 of the present invention is configured to manually slide the inner cylindrical portion 38b with respect to the outer cylindrical portion 38a. However, the inner cylindrical portion 38b is automatically driven by a motor or the like with respect to the outer cylindrical portion 38a. It is good also as a structure made to slide by.

  As shown in FIGS. 2 and 3, on one side intersecting with the axial direction of the plate cylinder 31 and on both sides in the axial direction of the plate cylinder 31, the upper ends of the plate cylinders 31 extend substantially in the vertical direction. A pair of oscillating plates 33 pivotally supported by the side frames 2a are disposed to face each other, and a furnisher roll 34 whose axis is directed horizontally is interposed between the lower ends of the oscillating plates 33. It is pivotally supported.

  The finisher roll 34 can be switched between a state where it is in contact with the outer peripheral surface of the plate cylinder 31 and a state where it is not in contact with the swing of the swing plates 33, and during operation of the printing apparatus 1, The plate cylinder 31 rotates in the direction opposite to the plate cylinder 31 while being in contact with the outer peripheral surface of the plate cylinder 31.

  Between the upper portions of the outer peripheral surfaces of the plate cylinder 31 and the finisher roll 34, as shown in FIG. 3, a pair of side plates 35 are arranged so as to straddle the plate cylinder 31 and the finisher roll 34. A pair of liquid tanks Li are provided that are spaced apart in the axial direction of the cylinder 31 and store ink supplied to the outer peripheral surface of the plate cylinder 31 by the plate cylinder 31, the finisher roll 34, and both side plates 35. Ink is supplied from an ink supply device (not shown) to the liquid reservoir Li.

  Further, on the other side intersecting with the axial direction of the plate cylinder 31, a doctor blade that presses against the outer peripheral surface of the plate cylinder 31 and scrapes off excess ink adhering to the outer peripheral surface by the rotation operation of the plate cylinder 31. 36 is arranged.

  Further, a pressure drum 37 is provided above the plate cylinder 31 to press the printing material W onto the plate cylinder 31 from above. The pressure drum 37 can be slid up and down by a slide mechanism (not shown). ing.

  Then, with the plate cylinder 31 supported by the support shafts 32a, the impression cylinder 37 is slid downward, and the printing material W is sandwiched between the plate cylinder 31 and the impression cylinder 37, and the plate Ink adhering to the outer peripheral surface of the plate cylinder 31 is transferred to the printing material W while the printing material W is moved by the rotational operation of the cylinder 31 and the impression cylinder 37.

  Below the plate cylinder 31 and the finisher roll 34, there are provided a pair of guide plates 39 that extend along the axial direction of the plate cylinder 31 and can be attached to and detached from the side frames 2a. The plates 39 are disposed to face each other so as to approach each other as they go downward, and the lower end edges of both guide plates 39 are located directly below the finisher roll 34.

  The guide plates 39 are removed from the printing unit 2 and attached to the side of the carriage 5 so as not to disturb the printing apparatus 1 when the printing apparatus 1 is not operated.

  A plate cylinder delivery mechanism (plate cylinder delivery means) 4 for delivering the plate cylinder 31 between the side frames 2 a and the carriage 5 is provided at the lower part of each printing unit 2.

  The plate cylinder delivery mechanism 4 includes a base frame 41 extending in the direction of the plate cylinder axis from the lower portion of the one side frame 2a (right side of the drawing in FIG. 2) toward the other side frame 2a (left side of the drawing in FIG. 2). A support frame Fr that supports the extended end side of the base frame 41 between the base frame 41 and the ground is provided at a position near the extended end of the base frame 41.

  A servo motor-controlled first drive unit 42 is provided above the base frame 41 of the one side frame 2a so that the rotation axis is directed toward the plate cylinder axis. A rotation shaft 42a extending in the plate cylinder axis direction is attached to the output shaft of the first drive unit 42, and the rotation shaft 42a rotates in conjunction with the rotation drive of the first drive unit 42. ing.

  A pair of vertically long, substantially rectangular gear cases 43 are provided on the upper surface of the base frame 41 at a predetermined interval in the plate cylinder axis direction. The rotating shaft 42a penetrates one gear case 43 and extends. The leading end reaches the inside of the other gear case 43, and a spur gear 42b (see FIG. 3) that rotates integrally with the rotating shaft 42a is provided in each gear case 43.

  Each gear case 43 is provided with a rack 44 penetrating the gear case 43 in the vertical direction, and the rack 44 and the spur gear 42 b are engaged with each other in the gear case 43.

  A substantially U-shaped support plate 45 is attached to the upper end of each rack 44 in plan view extending in the plate cylinder axis direction (see FIG. 5). At approximately four corners of the support plate 45, unit-side rollers 46 whose rotation axis centers in the plate cylinder axis direction are provided, and the plate cylinder 31 is supported by the four unit-side rollers 46 so as to be rotatable around the axis. It is supposed to be.

  As shown in FIG. 3, on the one side of the back surface of the support plate 45 on the one side in the plate cylinder axis direction and on one side intersecting the plate cylinder axis direction, the servo whose rotation axis points in the plate cylinder axis direction is shown. A second drive unit 47 for motor control is provided.

  Among the four unit-side rollers 46, the unit-side roller 46 located on one side in the plate cylinder axis direction and on one side intersecting the plate cylinder axis direction is connected to the first roller via a belt (not shown). The plate cylinder 31 supported by the four unit-side rollers 46 is rotated around the axis center by being rotated by the rotational drive of the two drive unit 47.

  The second drive unit 47 is provided with a rotary encoder 47a (rotation angle detection unit). The rotary encoder 47a rotates around the axis of the plate cylinder 31 supported by the four unit-side rollers 46. The angle can be detected through the unit side roller 46.

  The racks 44, the support plates 45, the four unit-side rollers 46, and the second drive unit 47 constitute an elevating unit 40, and the elevating unit 40 supports the plate cylinder 31 from below while supporting the plate cylinder 31 from below. When the rotary shaft 42a is rotated by the rotational drive of one drive unit 42, the racks 44 are moved up and down via the spur gear 42b, and are moved up and down. While the plate cylinder 31 is transferred between the two, the plate cylinder 31 is transferred between the side frames 2a at the rising end position. Accordingly, the carriage 5 with the plate cylinder 31 carried into the printing unit 2 and the plate cylinders 31 attached to both side frames 2a of the respective printing units 2 are positioned vertically, and the plate cylinder 31 Since the width of each printing unit 2 intersecting with the axial direction becomes narrow, the space between the printing units 2 can be narrowed, and the printing apparatus 1 having a compact layout can be obtained.

  As shown in FIG. 9, the base frame 41 has a plate-like vertical wall portion 41a extending downward from the base frame 41, and the other side from the extended end of the vertical wall portion 41a. A mounting plate 41c having a substantially L-shaped cross section, which is formed of a plate-like horizontal wall portion 41b extending toward the frame 2a, is provided.

  On the upper surface of the horizontal wall portion 41b, a first projecting plate 48a and a second projecting plate 48b are juxtaposed at a predetermined interval in a direction intersecting the plate cylinder axis direction. The middle part in the longitudinal direction of the hook 48c extending in the substantially horizontal direction is pivotally supported by the horizontal support shaft 48e so as to be swingable in the vertical direction.

  An engagement groove 48d that opens downward is formed at one end in the longitudinal direction of the hook 48c, while one end of a coil spring (hook biasing member) Sp is fixed to the other end in the longitudinal direction of the hook 48c. ing.

  The other end of the coil spring Sp is fixed to the upper end of the second projecting plate 48b, and the coil spring Sp urges the hook 48c upward to hold the hook 48c in a substantially horizontal posture. It is like that.

  On the other hand, a substantially rectangular plate 52c protrudes upward on a frame 52b (see FIGS. 5 and 6) extending in the width direction of the carriage provided at a substantially central lower portion in the carriage entry direction of the carriage 5. A striker (engaged member) 52d that is substantially U-shaped in a plan view protrudes from the front surface of the plate 52c in the cart entry direction.

  Then, when the carriage 5 is carried below the plate cylinder attachment position of the printing unit 2, the striker 52d moves the carriage 5 below the plate cylinder attachment position of the carriage 5 as shown in FIG. Thus, the lower end in the longitudinal direction of the hook 48c is pressed, and the hook 48c is rotated against the urging force of the coil spring Sp while being in sliding contact with the striker 52d. Further, when the carriage 5 is moved downward to the plate cylinder attachment position of the printing unit 2 and the striker 52d corresponds to the engagement groove 48d, the hook 48c is rotated by the restoring force of the coil spring Sp to The striker 52d is engaged with the engagement groove 48d, and the position of the carriage 5 in the longitudinal direction is determined with respect to the printing unit 2.

  In other words, the carriage positioning means 13 is constituted by the plate 52c and the striker 52d, and the striker 52d can engage and disengage the carriage 5 that has entered the printing cylinder 2 below the plate cylinder mounting position with the hook 48c of the printing unit 2. By a simple engagement operation (linkage operation), the carriage 5 is positioned so as not to move below the plate cylinder mounting position.

  A non-contact sensor 6 is disposed in the middle of the printing unit 2 in the vertical direction and on the side of the printing unit 2 (above the first drive unit 42 of one side frame 2a).

  The non-contact sensor 6 irradiates a laser beam Lz from one axial direction side of the plate cylinder 31 toward the axial center end of the plate cylinder 31 to reach the axial end of the plate cylinder 31. The key can be measured by utilizing the fact that the measured value varies between the portion where the key groove 31b is formed and the portion where the key groove 31b is not formed at the end in the axial direction of the plate cylinder 31. The groove 31b is detected.

  The rotary encoder 47a and the non-contact sensor 6 constitute a key groove position detecting mechanism (key groove position detecting means) 60 for detecting the position of the key groove 31b in the plate cylinder 31, and the register mark 31c is determined in advance. With the rotary encoder 47a, the plate cylinder 31 supported by the elevating unit 40 in the state of being rotated is rotated about the axis until the non-contact sensor 6 detects the key groove 31b. By detecting the rotation angle, the position of the key groove 31b with respect to the register mark 31c is detected. Therefore, the non-contact sensor 6 does not contact the axial end of the plate cylinder 31 when detecting the keyway 31b. Therefore, the plate cylinder 31 is not displaced in the axial direction in the elevating unit 40, and the plate cylinder in the elevating unit 40 is detected. It is possible to prevent a mistake in attaching each printing unit 2 to both side frames 2a due to the positional deviation of 31.

  Further, the structure of the printing unit 2 can be simplified without a complicated structure as in the case of detecting the position by contacting the keyway 31b with a contact type sensor.

  Furthermore, when detecting the key grooves 31b of the plate cylinders 31 of different types, the key grooves 31b of the plate cylinders 31 can be detected only by changing the ascending / descending position of the elevating unit 40 while the non-contact sensor 6 is fixed. Therefore, the position of the key groove 31b of the plate cylinder 31 of various sizes can be detected by using the lifting operation of the lifting unit 40 without complicating the structure of each printing unit 2.

  The carriage 5 is configured to be able to freely travel on the floor, and carries the plate cylinder 31 into and out of the lower part of the printing unit 2 through an opening (not shown) formed in the lower part of the other side frame 2a. As shown in FIG. 2, a main body frame 51 is provided which is elongated in the carriage entry direction to form a skeleton of the carriage 5 and is assembled with a plurality of iron frames having an L-shaped cross section.

  As shown in FIGS. 5 and 6, the main body frame 51 has a substantially U-shaped lower frame 51a in a plan view in which the front end in the cart entry direction opens and a substantially U-shape in a plan view in which the front end in the cart entry direction opens. And an upper frame 51b corresponding to a position from the front end in the carriage approach direction above the lower frame 51a to the middle.

  The upper frame 51b is assembled to the lower frame 51a by a connecting frame 51c extending straight downward from the four corners of the upper frame 51b. As shown, a pair of slide rails Sr is provided.

  A pair of front casters Ca cannot rotate around an axis extending in the vertical direction in front of the lower frame 51a on the lower end side, and a pair of rear casters Cb extend in the vertical direction on the rear side of the lower truck 51a. A substantially portal-shaped gripping member 51d is attached to the rear end of the lower frame 51a in the cart entry direction, and the operator H grips the upper end of the gripping member 51d and attaches the upper end of the gripping member 51d. The carriage 5 can be moved.

  Above the upper frame 51b, there is provided a slide frame 54 on which the plate cylinder 31 is mounted, and the slide frame 54 extends along the carriage entry direction so as to correspond to the slide rails Sr. A frame 54a and a pair of second frames 54b bridging between the first frames 54a with a predetermined distance in the carriage entry direction are formed by the first frames 54a and the second frames 54b. The opening 54c is wide enough to allow the support plate 45 to pass therethrough.

  On both lower surfaces of the first frames 54a, sliders 54d having a substantially U-shaped cross section that are slidably fitted to the slide rails Sr are respectively provided so as to protrude from the upper frame 51b. It can slide in the approach direction.

  Further, as shown in FIG. 7C, each of the first frames 54a has a substantially L-shaped cross section, and the side surface covers the upper side surface of the upper frame 51b. As shown in FIGS. 7A and 7B, a pair of positioning holes 54e are formed on the side surface of 54a (the upper side in FIG. 5 and FIG. 6) at a predetermined interval in the cart entry direction.

  Further, an index plunger 51e in which a tip pin P2 protrudes outwardly is attached to a portion extending along the carriage entry direction of the upper frame 51b corresponding to the one first frame 54a. As shown in FIGS. 5 and 7A, when the slide frame 54 is slid forward in the carriage entry direction with respect to the upper frame 51b, the tip of the index plunger 51e is inserted into one positioning hole 54e. By inserting the pin P2, the position of the slide frame 54 with respect to the upper frame 51b is determined. On the other hand, as shown in FIGS. 6 and 7B, the slide frame 54 is moved with respect to the upper frame 51b. When sliding to the rear side, the other positioning hole 54e By fitting the tip pin P2 of the serial index plunger 51e, so that the position of the slide frame 54 relative to the upper frame 51b is determined.

  Each of the second frames 54b is provided with a pair of carriage-side rollers 55 with a predetermined interval in the carriage width direction with the rotation axis centered in the carriage entry direction. 31 is rotatably supported.

  Also, a brake lever 55a capable of restricting the rotation of the cart side roller 55 is provided on one of the two cart side rollers 55 formed on the second frame 54b on the rear side in the cart entry direction. By operation, the plate cylinder 31 mounted on the four cart side rollers 55 can be switched between a rotatable state and a stopped state.

  The four drum-side rollers 55 constitute a plate cylinder rotating unit 50. The plate cylinder rotating unit 50 pivots on the plate cylinder 31 mounted so that the register mark 31c is in a predetermined position. It is designed to rotate around the heart.

  As shown in FIGS. 5 and 6, a pair of rectangular plates 56 a are provided at the front end of the upper surface of the first frame 54 a located at one side in the cart width direction so as to protrude at a predetermined interval in the cart entry direction. A shaft 56b extending along the carriage entry direction is attached between the rectangular plates 56a.

  As shown in FIG. 3, the shaft 56b has a substantially square bar-like bar 56c supported at its lower end so that it can swing in the vertical direction, and the bar 56c can slide in the carriage entry direction with respect to the shaft 56b. It has become.

  Further, a projection 56d having a sharp tip is projected from the upper end of the bar 56c toward the plate cylinder 31 mounted on the plate cylinder rotating unit 50.

  The plate cylinder rotating unit 50, the rectangular plate 56a, the shaft 56b, and the bar 56c constitute a mark positioning means 56. By the tilting operation of the bar 56c, the tip of the projection 56d is mounted on the register of the plate cylinder 31 on which the board is mounted. The outer peripheral surface corresponding to the mark 31c is brought into contact. Accordingly, when the mark positioning means 56 sets the register mark 31c to a predetermined position, the projection 56d of the bar 56c serves as a mark indicating the predetermined position of the register mark 31c in the plate cylinder 31, so that the register mark It is easy to set 31c to a predetermined position. Further, since a mark can be made at a predetermined position of the register mark 31c in the plate cylinder 31 with a simple structure, the cart 5 can be made at a low cost.

  In addition, a plate cylinder positioning mechanism (plate cylinder positioning means) 57 that is movable in the cart advance / retreat direction is provided on the front side of the first frame 54a located on one side in the cart width direction.

  As shown in FIGS. 8A and 8B, the plate cylinder positioning mechanism 57 includes a positioning plate 57a formed in a substantially L shape, a plate support member 57b that supports the positioning plate 57a, and a carriage advance / retreat. A mark member 57i that is marked in a position corresponding to the end of each of the various plate cylinders 31 that extend along the direction and has different lengths, and the carriage moves forward and backward on the side opposite to the mark member 57i of the first frame 54a. A guide rail 57j disposed along the direction and a slider 57k having a U-shaped cross section that is slidable along the mark member 57i are provided.

  The plate support member 57b sinks below a vertical plate portion 57c extending vertically, an upper horizontal plate portion 57d extending horizontally from the upper end of the vertical plate portion 57c so as to be separated from the first frame 54a, and below the first frame 54a. In this way, a lower horizontal plate portion 57e extending horizontally from the lower end of the vertical plate portion 57c is provided, and between the upper horizontal plate portion 57d and the vertical plate portion 57c, a plate support whose plate surface faces in the cart entry direction. A plate 57f is formed integrally with the upper horizontal plate portion 57d and the vertical plate portion 57c.

  The slider 57k is provided on the upper surface of the lower horizontal plate portion 57e, and is slidably fitted to the guide rail 57j. The plate support member 57b enters the carriage with respect to the first frame 54a. It can slide along the direction.

  One end of the positioning plate 57a is pivotally supported on the plate support plate 57f so as to be swingable in the vertical direction by a horizontal support shaft 57g, and a torsion spring (plate urging member) 57h is wound around the horizontal support shaft 57g. It is disguised.

  The torsion spring 57h has an inclined posture in which one end side is fixed to the positioning plate 57a and the other end side is fixed to the vertical plate portion 57c, and the positioning plate 57a is pivoted upward to extend substantially obliquely upward. As shown in FIG. 8B, even if the plate cylinder 31 comes into contact with the positioning plate 57a from above, the positioning plate 57a resists the biasing force of the torsion spring 57h. And turn downward. Accordingly, when the plate cylinder 31 is placed on the carriage 5, even if the plate cylinder 31 contacts the positioning plate 57a unexpectedly from above, the positioning plate 57a moves downward against the urging force of the torsion spring 57h. Since it rotates, it is possible to prevent a failure of the positioning plate 57a when the plate cylinder 31 comes into contact with the positioning plate 57a from above.

  Then, in a state where the positioning plate 57a is slid on the mark of the mark member 57i corresponding to the plate cylinder 31 to be mounted, the axial center end of the plate cylinder 31 is brought into contact with the positioning plate 57a. By mounting the plate cylinder 31 on the plate cylinder rotating unit 50, the carriage 5 can be attached to the printing unit 2 when the carriage 5 enters the lower side of the plate cylinder attachment position. 5 is positioned. Therefore, the sliding operation of the slider 57k can easily move the positioning plate 57a to the mark corresponding to the end of each plate cylinder 31, and the setup time when the plate cylinder 31 is replaced can be shortened.

  Above the first frame 54a located on the other side in the carriage width direction, an ink receiving member 58 having a substantially V-shaped cross section extending along the carriage entry direction is disposed.

  The ink receiving member 58 has an opening 58 a at the upper end, and the opening 58 a corresponds to the lower edge of each guide plate 39 in a state where the carriage 5 is carried into the lower part of the printing unit 2. It has become. The ink receiving member 58 receives ink guided downward along the guide plates 39 through the opening 58a.

  The opening 58a is covered with a plate-like filter 58b extending in a substantially horizontal direction so as to remove dust in the ink passing therethrough.

  Further, as shown in FIG. 2, the bottom of the ink receiving member 58 is gently inclined downward toward the rear side of the carriage entry direction, and the ink received by the ink receiving member 58 is rearward of the carriage entry direction. To flow toward.

  As shown in FIGS. 5 and 6, the lower frame 51 a protrudes upward from the upper surface of the rear side in the cart entry direction from a substantially rectangular bottom wall portion 59 a extending in the cart width direction and the outer peripheral edge of the bottom wall portion 59 a. A pedestal 59 comprising a provided side wall 59b is provided, and the pedestal 59 protrudes from the lower frame 51a to both sides.

  Two ink collection boxes for collecting ink received by the ink receiving member 58 from the opening 12a having an opening 12a at the upper end at the center in the carriage width direction of the pedestal 59 and the other side in the carriage width direction. 12 are juxtaposed.

  Further, an ink guide portion 53 for guiding the ink received by the ink receiving member 58 to the ink collection box 12 is provided at the rear end of the upper frame 51b in the carriage entering direction.

  The ink guide portion 53 is provided with an inclined portion 53a having a substantially U-shaped cross section that is pivotally supported on the front side in the carriage entry direction so as to be swingable left and right, and that is inclined downward toward the rear side in the carriage entry direction. The rear end of the inclined portion 53a in the carriage entry direction is positioned above each ink collection box 12.

  The ink guide 53 is positioned below the rear end portion of the ink receiving member 58 in the carriage entry direction in a state where the slide frame 54 is slid forward with respect to the upper frame 51b. The ink that flows toward the rear side in the carriage entry direction of the ink receiving member 58 and falls from the rear end in the carriage entry direction is guided to the ink collection boxes 12.

  As shown in FIGS. 3 and 6, a pair of substantially L-shaped guide members 52a in front view disposed opposite to the pair of connection frames 51c are provided at the front end of the main body frame 51 in the cart entry direction. The interval between the protruding ends corresponds to the width dimension of the base frame 41.

  When the carriage 5 is carried into the lower part of the printing unit 2 (see FIGS. 11 and 12), as shown in FIG. 3, the carriage 5 has the protruding end surfaces of the guide members 52a at the base frame 41. It is carried into the lower part of the printing unit 2 while being in sliding contact with both side surfaces, and the position of the carriage 5 in the width direction is determined with respect to the printing unit 2.

  The carriage 5 is carried into the lower part of the printing unit 2 and the slide frame 54 is slid forward in the carriage entry direction with respect to the upper frame 51b in a state where the hook 48c is locked to the striker 52d. In the positioned state (see FIG. 13), the elevating unit 40 is positioned below the plate cylinder 31 mounted on the plate cylinder rotating unit 50, and the plate cylinder 31 is moved to the plate when raised. While being received from the cylinder rotation unit 50 and raised (see FIGS. 14 and 15), the plate cylinder 31 received from both side frames 2a of each printing unit 2 is transferred to the plate cylinder rotation unit 50 when lowered. Has been. Therefore, when the elevating unit 40 is raised, the transfer of the plate cylinder 31 from the carriage 5 to the elevating unit 40 and the movement of the plate cylinder 31 to the mounting position of each printing unit 2 can be performed at one time. Since the portion 40 is lowered, the plate cylinder 31 can be moved from the mounting position of each printing unit 2 to the carriage 5 and the plate cylinder 31 can be transferred from the lifting portion 40 to the carriage 5 at a time. The plate cylinder 31 can be exchanged efficiently.

  Moreover, since the raising / lowering part 40 supports the plate cylinder 31 positioned on the cart 5 from below when it is lifted in its posture, when the plate cylinder 31 is transferred from the carriage 5 to the elevator unit 40, The register mark 31c of the plate cylinder 31 at the predetermined position does not shift.

  As shown in FIG. 10, a control panel (control means) 7 for controlling the printing unit 2 is connected to the printing unit 2.

  The control panel 7 controls the rotational drive unit 32c so that the key 32b is positioned at the upper end of the support shaft 32a in a state where the plate cylinder 31 is detached from the support shafts 32a.

  As shown in FIGS. 16B and 16C, the control panel 7 controls the first drive unit 42 in a state where the carriage 5 on which the plate cylinder 31 is mounted is carried into the lower part of the printing unit 2. Then, by raising and lowering the elevating part 40, the elevating part 40 receives the plate cylinder 31 from the cart 5.

  Further, as shown in FIGS. 16 (c) and 16 (d), the control panel 7 controls the first drive unit 42 to stop the elevating unit on which the plate cylinder 31 is mounted in the middle of ascending, and In the state where the second driving unit 47 is controlled and the plate cylinder 31 is rotated around the axis by the four unit side rollers 46, the key groove position detecting mechanism 60 is controlled to control the key groove 31b. The position is detected.

As shown in FIG. 10, the control panel 7 includes a storage unit 7a for storing various data input from an operation panel (not shown), and the storage unit 7a includes the storage unit 7a as shown in FIGS. In addition, the distance L between the transfer positions of the adjacent printing units 2 to the printing material W, the radius r of the plate cylinder 31, the position data of the register mark 31c of the plate cylinder 31 mounted on the carriage 5, and the printing pattern In order to match, the reference position correction angle θ _α for correcting to the regular reference position of the downstream plate cylinder 31 with respect to the upstream plate cylinder 31 of the adjacent printing unit 2 is stored in advance.

Incidentally, the reference position correction angle theta _alpha, in which predetermined between the plate cylinder 31 for attaching each of the printing units 2 adjacent.

Then, the control platform 7, the plate cylinder 31 of each printing unit 2, the position data theta _b and the storage unit 7a to the stored register mark 31c keyway 31b detected by the key groove position detecting mechanism 60 position data theta angle theta ₁ around the axis between the key groove 31b and the register mark 31c _a based _on, provided with a calculation unit 7b for calculating theta _2, respectively, the calculating portion 7b is adjacent printing units The rotational angle θ ₃ for registering the downstream plate cylinder 31 with respect to the upstream plate cylinder 31 in the two upstream plate cylinders 31 and the downstream plate cylinder 31 is expressed by the following equation (1):
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r + θ _α (n is an integer) (1)
It is designed to calculate each.

As shown in FIG. 17, the calculation formula (1) is obtained by using the upstream plate cylinder of the printing material W in the printing cylinders 31 of both printing units 2 located upstream and in the printing material feeding direction. the distance R.theta ₁ between the registration position X1 corresponding to the transfer position and register mark 31c 31, wherein the distance between the registration position X2 corresponding to the transfer position and register mark 31c on the downstream side plate cylinder 31 (2)
L ′ = 2nπr + rθ ₁ −L (2)
It was obtained from.

Further, the control board 7, as shown in FIG. 16 (e), while detecting the position data theta _b keyway 31b in the key groove position detecting mechanism 60, and controls the second driving unit 47 The plate cylinder 31 is rotated around the axis by the four unit side rollers 46 until the key groove 31b is positioned at the upper end of the plate cylinder 31 so as to correspond to the key 32b.

  Further, as shown in FIG. 16 (f), the control panel 7 controls the first driving unit 42 in a state where the key groove 31 b of the plate cylinder 31 mounted on the elevating unit 40 is located at the upper end. And the said raising / lowering part 40 is raised to a raise end position.

  In addition, the control panel 7 controls the cylinders 32d with the elevating part 40 in the ascending end position to advance both the support shafts 32a to both axial ends of the plate cylinder 31, The key 32b is inserted into the keyway 31b, the plate cylinder 31 is rotatably supported by the both side frames 2a, and the first driving unit 42 is controlled as shown in FIG. 16 (g). The elevating part 40 is lowered.

Then, as shown in FIGS. 17 to 19, the control panel 7 controls the rotation driving portion 32c and adjoins the plate cylinder 31 in a state where the plate cylinder 31 is rotatably supported by the both side frames 2a. The downstream plate cylinder 31 is rotated by the rotation angle θ ₃ with respect to the upstream plate cylinder 31 of the unit 2.

17 to 19 show a state in which the impression cylinder 37 presses the printing material W onto the plate cylinder 31 from above, but it is downstream of the upstream plate cylinder 31 of the adjacent printing unit 2. When the side plate cylinder 31 is rotated by the rotation angle θ ₃ , the impression cylinder 37 is slid upward by a slide mechanism (not shown) so that the impression cylinder 37 does not press the printing material W onto the plate cylinder 31 from above. Do in state.

  The control panel 7 controls the first drive unit 42 to raise the elevating unit 40 to the ascending end position while the plate cylinder 31 is rotatably supported on the support shafts 32a. The plate cylinder 31 is supported by the elevating unit 40, and the cylinders 32d are controlled so that the both support shafts 32a are retracted from both ends in the axial direction of the plate cylinder 31 from the both side frames 2a. The plate cylinder 31 is removed, and the plate cylinder 31 is transferred from the both side frames 2a to the elevating unit 40.

  Further, the control panel 7 is configured so that the lift unit 40 supports the plate cylinder 31 and the carriage 5 on which the plate cylinder 31 is not mounted is carried into the lower part of the printing unit 2. The first drive unit 42 is controlled to lower the elevating unit 40, and the plate cylinder 31 is delivered to the cart 5 during the lowering.

  Next, a method for attaching the plate cylinder 31 to each printing unit 2 of the printing apparatus 1 will be described.

  First, the operator H slides the positioning plate 57a to a position corresponding to the plate cylinder 31 to be replaced next in the mark member 57i while the printing apparatus 1 is in operation, and the plate cylinder is moved to the positioning plate 57a. The plate cylinder 31 is placed on the plate cylinder rotating unit 50 while contacting the axial direction end of 31.

  Next, as shown in FIG. 16A, the plate cylinder 31 is rotated by the plate cylinder rotating section 50 so that the bar 56c is tilted so that the tip of the protrusion 56d contacts the register mark 31c, and the protrusion In a state where 56d is in contact with the register mark 31c, the brake lever 55a is operated to stop the rotation of the plate cylinder 31.

  Then, the carriage 5 on which the plate cylinder 31 is mounted as described above is put on standby for each printing unit 2.

  When the printing operation of the printing apparatus 1 is completed, the used plate cylinder 31 is removed from each printing unit 2 of the printing apparatus 1, and then the rotation drive unit 32c is driven to previously place the key 32b on the upper end of the support shaft 32a. The plate cylinder 31 is rotated so as to be positioned.

  After that, as shown in FIG. 11, each carriage 5 that has been waiting for each printing unit 2 is made to enter below the plate cylinder mounting position of each printing unit 2. When the carriage 5 is moved below the plate cylinder mounting position of the printing unit 2, the carriage 5 is carried into the lower part of the printing unit 2 while the protruding end surfaces of both guide members 52 a are in sliding contact with both side surfaces of the base frame 41. Therefore, the position of the carriage 5 in the width direction is determined with respect to the printing unit 2.

  Next, when the carriage 5 is further moved into the printing unit 2 from the state shown in FIG. 11, the striker 52d presses the hook 48c as shown in FIG. 12, and the hook 48c resists the biasing force of the coil spring Sp. Then rotate. When the carriage 5 further enters the printing unit 2, the striker 52d corresponds to the engagement groove 48d, and the hook 48c is rotated by the restoring force of the coil spring Sp to enter the engagement groove 48d. The striker 52d is engaged, and the position of the carriage 5 in the longitudinal direction with respect to the printing unit 2 is determined.

  Therefore, when the carriage 5 is entered from the side below the plate cylinder mounting position of the printing unit 2, the carriage positioning means 13 and the hook 48 c are engaged with each other by the engaging operation, so that the carriage 5 is fixed to the unit of the printing unit 2. Can be firmly fixed to the side.

  Further, when the carriage 5 enters the printing unit 2, the hook 48 c automatically engages with the striker 52 d and the carriage 5 is fixed to the unit fixing side of the printing unit 2. Apart from the operation of entering the printing unit 2, it is not necessary to perform a troublesome operation of fixing the carriage 5 to the printing unit 2, and the carriage 5 can be easily fixed to the unit fixing side of the printing unit 2.

  Thereafter, as shown in FIG. 13, the slide frame 54 is slid forward in the carriage entry direction with respect to the upper frame 51b, and the tip pin P2 of the index plunger 51e is fitted into one positioning hole 54e (FIG. 7). Thus, the position of the slide frame 54 with respect to the upper frame 51b is determined.

  Thereafter, as shown in FIGS. 14 and 16 (b), the first driving unit 42 is driven to raise the elevating unit 40 and pass through the opening 54c, and the plate is moved by the four unit side rollers 46. The body 31 is supported from below.

Thereafter, as shown in FIG. 16C, the first driving unit 42 is driven to further raise the elevating unit 40 and stop at the middle position in the vertical direction of the printing unit 2. Then, as shown in FIG. 16 (d), the second driving unit 47 is driven to rotate the plate cylinder 31 around the axis, and the non-contact sensor 6 defines the key groove 31 b in the plate cylinder 31. detecting the position data theta _b.

Then, by the calculation unit 7b, the position data theta _b and the key groove 31b position data theta _a based on the register mark 31c stored in the storage portion 7a of the key groove 31b which is detected by the key groove position detecting mechanism 60 And angles θ ₁ and θ ₂ about the axis between the register mark 31c and the register mark 31c are calculated.

Further, by the calculation unit 7b, the rotation angle θ ₃ for registering the downstream plate cylinder 31 with respect to the upstream plate cylinder 31 between the upstream plate cylinder 31 and the downstream plate cylinder 31 of the adjacent printing units 2. (1)
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r + θ _α (n is an integer) (1)
Let each calculate.

The calculated θ ₃ is converted into a value of π ≧ θ ₃ ≧ −π. For example, when the calculated θ ₃ is 3π, it is converted to θ ₃ = π and used as the rotation angle.

  Thereafter, as shown in FIG. 16E, the four driving units 47 are driven until the key groove 31b is positioned at the upper end of the plate cylinder 31 so as to correspond to the key 32b. The plate cylinder 31 is rotated around the axis by the side roller 46.

  Thereafter, as shown in FIG. 16 (f), the first drive unit 42 is further driven to raise the elevating unit 40 to the ascending end position, and as shown in FIG. 15, the cylinders 32d are expanded and contracted. Both the support shafts 32a are advanced to both ends of the plate cylinder 31 in the axial direction. Then, the key 32b is inserted into the key groove 31b, and the plate cylinder 31 is rotatably supported by the both side frames 2a.

Then, as shown in FIG. 16 (g), the first driving unit 42 is driven to lower the elevating unit 40, and then the rotational driving unit 32c is driven as shown in FIGS. Then, the downstream plate cylinder 31 is rotated by the rotation angle θ ₃ with respect to the upstream plate cylinder 31 of the adjacent printing unit 2, and the attachment of the plate cylinder 31 to the printing unit 2 is completed.

Accordingly, since the position data theta _a of register mark 31c necessary to know the position of the register mark 31c to the key groove 31b the plate cylinder 31 can be obtained in advance in the state of being nono a truck 5, the truck 5 The time taken to obtain the angles θ ₁ and θ ₂ around the axis between the register mark 31c and the keyway 31b after the printing unit 2 is carried into each printing unit 2 is shortened. Further, the plate cylinder 31 from the position data theta _a position data theta _b and register mark 31c position data theta _b detects the keyway 31b keyways 31b before attachment to the side frames 2a of each printing unit 2 Since the rotation angle θ ₃ for registering the downstream plate cylinder 31 with respect to the upstream plate cylinder 31 of the adjacent printing unit 2 is known, the plate cylinder 31 is attached to both side frames 2 a of each printing unit 2. After that, each plate cylinder 31 is automatically registered automatically. Therefore, the stop time of the printing apparatus 1 when replacing the plate cylinder 31 is shortened, and the working efficiency is improved.

  Next, a method for removing the plate cylinder 31 from each printing unit 2 of the printing apparatus 1 will be described.

  First, in the state where the plate cylinder 31 is supported on the support shafts 32a and the carriage 5 on which the plate cylinder 31 is not mounted is carried into the lower part of the printing unit 2, the first drive unit 42 is provided. Is driven to raise the elevating part 40 to the ascending end position, and the elevating part 40 supports the plate cylinder 31.

  Next, the cylinders 32d are expanded and contracted, the support shafts 32a are retracted from both axial ends of the plate cylinder 31, the plate cylinders 31 are removed from the side frames 2a, and the side frames 2a The plate cylinder 31 is transferred to the elevating part 40.

  Thereafter, the first drive unit 42 is driven to lower the elevating unit 40, and the plate cylinder 31 is transferred to the cart 5 during the lowering.

  Then, the slide frame 54 of the carriage 5 is slid to the rear side in the carriage entry direction with respect to the upper frame 51b and positioned, and then the engagement between the hook 48c and the striker 52d is released.

  Thereafter, the carriage 5 is moved backward from the lower side of the printing cylinder mounting position of the printing unit 2 to the side, and the printing cylinder 31 is unloaded from the printing unit 2.

  As described above, according to the first embodiment of the present invention, since the carriage 5 is advanced and retracted from the side with respect to the lower side of the printing cylinder mounting position of the printing unit 2, the upstream side and the downstream side in the printing material feeding direction of the printing unit 2. Space can be used effectively. In addition, the plate cylinder 31 can be attached to the printing unit 2 simply by entering the carriage 5 below the plate cylinder attachment position of the printing unit 2 by the plate cylinder positioning mechanism 57 and the carriage positioning means 13. Moves the carriage 5 below the plate cylinder mounting position of the printing unit 2, and then moves the printing unit 2 upstream and downstream in the printing material feeding direction, and sets the position of the plate cylinder 31 relative to the plate cylinder mounting position. There is no need to confirm, and the plate cylinder 31 can be easily replaced.

  Further, when the slide frame 54 of the carriage 5 is slid in the carriage entry direction with respect to the main body frame 51, a position where the plate cylinder 31 can be attached to the printing unit 2 with the carriage 5 entered below the plate cylinder attachment position. On the other hand, if the slide frame 54 is slid with respect to the main body frame 51 in the backward direction of the carriage, the entire length of the carriage 5 is shortened and becomes compact, so that a small turn is effective when the plate cylinder 31 is transported by the carriage 5. The operation of the cart 5 of the person H is simplified.

  In the embodiment of the present invention, the register mark 31c is positioned at a predetermined angle as it goes from the upstream plate cylinder 31 to the downstream plate cylinder 31 of the printing unit 2 arranged side by side. Although it is marked, it may be marked so that the position is decreased by a predetermined angle from the upstream plate cylinder 31 to the downstream plate cylinder 31 of the printing units 2 arranged side by side.

In the embodiment of the present invention, the register mark 31c as a temporary reference mark is marked on the plate cylinder 31, but a registration mark marked as a reference mark is used at a regular reference position for matching a printed pattern. Registration may be performed. In this case, the value of θ _{α in} the above equation (1) is zero.

  In the embodiment of the present invention, the downstream plate cylinder 31 is registered with respect to the upstream plate cylinder 31 of the adjacent printing unit 2, but not limited to the adjacent printing unit 2. The upstream printing cylinder 31 and the downstream printing cylinder 31 of the two printing units 2 may be registered.

  Further, in the embodiment of the present invention, the printing apparatus 1 in which three printing units 2 are arranged side by side has been described. However, the present invention is not limited to three printing units 2 but may be applied if two or more printing units 2 are arranged in parallel. it can.

  In the embodiment of the present invention, the plate cylinder 31 mounted on the plate cylinder rotating unit 50 of the carriage 5 is manually rotated. However, the carriage is provided with a driving unit so as to be automatically rotated. May be.

  In the embodiment of the present invention, the predetermined position of the register mark 31c in the plate cylinder 31 is set to be different depending on the type of the plate cylinder 31. For example, the type of the plate cylinder 31 is different. However, they may all be set to be the same position. For example, even if the type of the plate cylinder 31 is different, the upper end position of the plate cylinder 31 may be a predetermined position of the register mark 31c.

Further, when the key groove position detection mechanism 60 detects the position of the key groove 31b, the average number of output pulses from the rotary encoder 47a per rotation detected by rotating the plate cylinder 31 a plurality of times, and the register From the state where the mark 31c is in a predetermined position until the non-contact sensor 6 detects the key groove 31b, the register mark 31c and the key groove 31b are detected by the number of output pulses detected by rotating the plate cylinder 31 around the axis. It is also possible to calculate the exact angles θ ₁ and θ ₂ around the axis between the _two .

In the embodiment of the present invention, the carriage 5 is provided with the striker 52d, while the hook 48c that engages with the striker 52d is provided on the unit fixing side of the printing unit 2, but the carriage 5 is provided with the hook 48c. The striker 52d may be provided on the unit fixing side of the printing unit 2.
<< Embodiment 2 of the Invention >>
FIG. 20 shows the printing apparatus 1 according to the second embodiment of the present invention. In the second embodiment, there is one printing unit 2, and when the plate cylinder 31 is replaced, after the plate cylinder 31 is rotatably supported by the both side frames 2 a, the register mark 31 c for the printing material W is changed. The point that alignment is started and printing is different from that of the first embodiment, and the rest is the same as that of the first embodiment.

  Therefore, according to the second embodiment of the present invention, even if there is only one printing unit 2, the plate cylinder 31 is mounted on the carriage 5 with the position data of the register mark 31c necessary for alignment of the plate cylinder 31. Since the time required for obtaining the angle around the axis between the register mark 31c and the keyway 31b after the carriage 5 is carried into the printing unit 2 can be shortened. The stop time of the printing apparatus 1 when the plate cylinder 31 is replaced is shortened, and the working efficiency is improved.

  In the present invention, a plurality of printing units having plate cylinders that are rotatably supported are arranged side by side, and ink that adheres to the outer peripheral surface of each plate cylinder by rotating operation in a state where the registration of each plate cylinder is aligned is sequentially printed It is suitable for a printing apparatus that superimposes and prints on the printing apparatus and its plate cylinder replacement method.

1 Printing device 2 Printing unit 2a Side frame (unit fixed side)
4 Plate cylinder delivery mechanism (plate cylinder delivery means)
5 Cart 6 Non-contact sensor 7 Control panel (control means)
7a Storage unit 7b Calculation unit 13 Cart positioning means 31 Plate cylinder 31b Keyway 31c Register mark (temporary reference mark)
32a Support shaft 32b Key 38 Cylindrical cover 40 Elevating part 48c Hook 50 Plate cylinder rotating part 51 Main body frame 52d Strike (engaged member)
54 Slide frame 56 Mark positioning means 56c Bar 57 Plate cylinder positioning mechanism (plate cylinder positioning means)
57a Positioning plate 57h Torsion spring (plate biasing member)
57i Marking member 57k Slider 60 Key groove position detection mechanism (key groove position detection means)

Claims (23)

A printing cylinder having a key groove is positioned by inserting a key on the unit fixing side into the key groove and is rotatably supported on the unit fixing side, and the printing cylinder is carried in and out of the printing unit. A trolley
Control means connected to the printing unit and for controlling the rotational movement of the plate cylinder,
The printing unit has the plate cylinder mounted so as to be rotatable about an axis, and plate cylinder transfer means for transferring the plate cylinder between the unit fixing side and the carriage, and a key groove position in the plate cylinder Keyway position detecting means for detecting
The plate cylinder is marked with a mark to match the printed pattern,
The carriage has mark positioning means for mounting the plate cylinder so that the mark is in a predetermined position,
The control means includes a storage unit that stores mark position data of a plate cylinder mounted on the carriage, a key groove position detected by the key groove position detection unit, and a mark position data stored in the storage unit. And a calculation unit for calculating the position of the mark with respect to the keyway in the plate cylinder, and controls the plate cylinder transfer means to rotate the plate cylinder so that the keyway corresponds to the key. The printing apparatus is configured to be rotatably supported on the unit fixing side of the printing unit. The printing apparatus according to claim 1,
A plurality of the printing units are juxtaposed,
The carriage is provided in each printing unit,
The mark on the plate cylinder is a reference mark,
The storage unit stores a distance L between transfer positions to a printing material of two printing units of the printing units and a radius r of the plate cylinder,
In the upstream printing cylinder and the downstream printing cylinder of two printing units of the printing units, the calculation unit includes angles θ ₁ and θ ₂ around the axis between the keyway and the reference mark. And a rotation angle θ ₃ for registering the downstream plate cylinder with respect to the upstream plate cylinder is expressed by the following equation (1):
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r (n is an integer) (1)
Calculate with
The printing apparatus is characterized in that the control means is configured to control the plate cylinder delivery means to rotate the downstream plate cylinder by the rotation angle θ ₃ with respect to the upstream plate cylinder. The printing apparatus according to claim 2,
A printing apparatus, wherein the carriage has a bar whose lower end is supported so as to be swingable in the vertical direction, and whose upper end is in contact with the outer peripheral surface corresponding to the reference mark of the plate cylinder on which the carriage is mounted by a tilting operation. The printing apparatus according to claim 2 or 3,
The carriage carries the plate cylinder into and out of the lower part of each printing unit,
The plate cylinder delivery means includes an elevating part that lifts and lowers the plate cylinder from below, and delivers the plate cylinder to and from the carriage at the lower end position of the elevating part. A printing apparatus configured to transfer the plate cylinder to a unit fixing side of each printing unit at a rising end position. The printing apparatus according to claim 4,
The elevating unit is located below the plate cylinder mounted on the carriage in a state where the carriage is loaded into each printing unit, and receives the plate cylinder from the carriage when it is raised and raises the plate cylinder when lowered. A printing apparatus configured to deliver a plate cylinder received from a unit fixing side of each printing unit to the carriage. The printing apparatus according to claim 4 or 5,
The key groove position detecting means includes a non-contact sensor that detects the key groove from one axial direction side of the plate cylinder, and a rotation angle detection unit that detects a rotation angle of the plate cylinder,
By rotating the plate cylinder around the axis from the state where the reference mark is in the predetermined position until the non-contact sensor detects the keyway, and detecting the rotation angle with the rotation angle detection unit. A printing apparatus configured to detect the position of the keyway with respect to the reference mark. The printing apparatus according to claim 1,
A plurality of the printing units are juxtaposed,
The carriage is provided in each printing unit,
The mark marked on the plate cylinder increases by a predetermined angle as it goes from the upstream plate cylinder to the downstream plate cylinder of the juxtaposed printing unit with respect to the normal reference position for aligning the print pattern. Or a temporary fiducial mark marked at the reduced position,
The storage unit stores a distance L between transfer positions to a printing material of two printing units of the printing units and a radius r of the plate cylinder,
In the upstream printing cylinder and the downstream printing cylinder of two printing units among the printing units, the calculation unit includes angles θ ₁ , θ around the axis between the keyway and the temporary reference mark. ₂ is calculated, and the rotation angle θ ₃ for registering the downstream plate cylinder with respect to the upstream plate cylinder is expressed by the following equation (1):
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r + θ _α (n is an integer) (1)
Calculate with
The printing apparatus is characterized in that the control means is configured to control the plate cylinder delivery means to rotate the downstream plate cylinder by the rotation angle θ ₃ with respect to the upstream plate cylinder. The printing apparatus according to claim 7.
A printing apparatus, wherein the carriage has a lower end supported so as to be swingable in a vertical direction, and has a bar that comes into contact with an outer peripheral surface corresponding to a temporary reference mark of the plate cylinder on which the upper end is placed by a tilting operation. The printing apparatus according to claim 7 or 8,
The carriage carries the plate cylinder into and out of the lower part of each printing unit,
The plate cylinder delivery means includes an elevating part that lifts and lowers the plate cylinder from below, and delivers the plate cylinder to and from the carriage at the lower end position of the elevating part. A printing apparatus configured to transfer the plate cylinder to a unit fixing side of each printing unit at a rising end position. The printing apparatus according to claim 9, wherein
The elevating unit is located below the plate cylinder mounted on the carriage in a state where the carriage is loaded into each printing unit, and receives the plate cylinder from the carriage when it is raised and raises the plate cylinder when lowered. A printing apparatus configured to deliver a plate cylinder received from a unit fixing side of each printing unit to the carriage. The printing apparatus according to claim 9 or 10,
The key groove position detecting means includes a non-contact sensor that detects the key groove from one axial direction side of the plate cylinder, and a rotation angle detection unit that detects a rotation angle of the plate cylinder,
Rotating the plate cylinder about the axis until the non-contact sensor detects the key groove from the state where the temporary reference mark is at the predetermined position, and detecting the rotation angle by the rotation angle detection unit. The printing apparatus is configured to detect the position of the keyway with respect to the temporary reference mark. The printing apparatus according to claim 6 or 11,
The printing apparatus according to claim 1, wherein the non-contact sensor is arranged in the middle in the vertical direction of the printing unit and on a side of the printing unit. The printing apparatus according to any one of claims 1 to 12,
On the unit fixing side of each of the printing units, the plate cylinder is supported by engaging with both axial ends of the plate cylinder in the advanced state, while being separated from both axial ends of the plate cylinder in the retracted state. A pair of support shafts for detaching the plate cylinder from the unit fixing side of each printing unit are disposed so as to be opposed to both end sides in the axial direction of the plate cylinder so as to be able to advance and retreat, and a cylindrical cover surrounding each support shaft Is provided for each,
When the support shaft is retracted in a state where it is engaged with the end portion in the axial direction of the plate cylinder, the end portion in the axial direction of the plate cylinder comes into contact with the tip of the cylindrical cover, and the axis of the plate cylinder A printing apparatus configured to be disengaged from a direction end. The printing apparatus according to claim 13.
The printing apparatus according to claim 1, wherein the cylindrical cover is configured to be adjustable in length in the axial direction of the plate cylinder. The printing apparatus according to any one of claims 1 to 14,
The carriage is a carriage positioning means for positioning the carriage that has entered from the side below the plate cylinder attachment position of the printing unit so as not to move below the plate cylinder attachment position by a linkage operation with the unit fixing side;
It is provided so as to be movable in the carriage advance and retreat direction, and abuts the end of the plate cylinder so that the plate cylinder on the carriage can be attached to the printing unit when the carriage enters below the plate cylinder attachment position. A printing apparatus comprising plate cylinder positioning means for positioning various plate cylinders having different lengths. The printing apparatus according to claim 15, wherein
The bogie has a main body frame that forms the skeleton of the bogie,
A slide frame provided on the upper part of the main body frame so as to be slidable in the carriage advancing and retracting direction, and carrying the plate cylinder;
The printing apparatus is characterized in that positioning of the plate cylinder by the plate cylinder positioning means is performed corresponding to a state in which the slide frame is slid in the carriage entering direction with respect to the main body frame. The printing apparatus according to claim 15 or 16,
The plate cylinder positioning means extends along the carriage advancing / retreating direction, and a marking member in which a mark is marked at a position corresponding to an end of various plate cylinders to be mounted,
A slider slidable along the marker member;
A printing apparatus, comprising: a positioning plate that is provided on the slider and contacts an end portion of the plate cylinder when the plate cylinder is mounted. The printing apparatus according to claim 17.
One end of the positioning plate is pivotally urged upward by a plate urging member, and one end of the positioning plate is pivotally supported by the slider. The printing apparatus according to any one of claims 15 to 18,
The printing apparatus according to claim 1, wherein the linking operation between the carriage positioning means and the unit fixing side is an engagement operation. The printing apparatus according to claim 19, wherein
The engagement operation is provided on one of the carriage positioning means and the unit fixing side, and is hooked and biased by a hook biasing member;
Provided on the other of the carriage positioning means and the unit fixing side, the hook is pressed by an approaching operation of the carriage below the plate cylinder mounting position, and the hook rotates against the urging force of the hook urging member. A printing apparatus comprising: an engaged member that moves and engages. Place the plate cylinder on the carriage so that the mark for matching the printed pattern is in a predetermined position,
Next, after removing the plate cylinder rotatably supported by the printing unit from the printing unit, the carriage is carried into the printing unit,
Thereafter, in the middle of transferring the plate cylinder from the carriage to the unit fixing side of the printing unit by the plate cylinder transfer means, the key groove position of the plate cylinder is detected, and the dimensions of the plate cylinder are controlled by the control means. Based on the data and the mark position data of the plate cylinder mounted on the carriage, the angle around the axis between the key groove position of the plate cylinder and the mark is calculated,
After that, the plate cylinder is rotated by the plate cylinder delivery means so that the key groove corresponds to the key on the unit fixing side of the printing unit, and the key is inserted into the key groove so that the plate cylinder A plate cylinder replacement method for a printing apparatus, wherein the plate cylinder is positioned and rotatably supported on a unit fixing side of each printing unit. The plate cylinder replacement method for a printing apparatus according to claim 21,
The mark on the plate cylinder is a reference mark,
The plate cylinder is mounted on the carriage so that the reference mark is in a predetermined position, and the carriage is put on standby for each of a plurality of printing units,
By the control means, the distance L between the transfer positions of the two printing units of the printing units to the printing material, the radius r of the plate cylinder, and the reference mark position data of the plate cylinder mounted on the carriage are obtained. Based on each of the printing units, the angles θ ₁ and θ ₂ around the axis between the key groove positions and the reference marks in the upstream plate cylinder and the downstream plate cylinder of the two printing units are calculated. The rotation angle θ ₃ for registering the downstream plate cylinder with respect to the upstream plate cylinder is expressed by the following equation (1):
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r (n is an integer) (1)
Calculate with
After the plate cylinder is rotatably supported on the unit fixing side of each printing unit, the downstream plate cylinder is rotated by the rotation angle θ ₃ with respect to the upstream plate cylinder. Plate cylinder exchange method. The plate cylinder replacement method for a printing apparatus according to claim 21,
The mark marked on the plate cylinder increases by a predetermined angle as it goes from the upstream plate cylinder to the downstream plate cylinder of the juxtaposed printing unit with respect to the normal reference position for aligning the print pattern. Or a temporary fiducial mark marked at the reduced position,
The plate cylinder is mounted on a carriage so that the temporary reference mark is in a predetermined position, and the carriage is put on standby for each of a plurality of printing units,
The distance L between the transfer positions of the two printing units to the printing material of the printing units among the printing units by the control means, the radius r of the plate cylinder, the temporary reference mark position data of the plate cylinder mounted on the carriage, and Based on a reference position correction angle θ _α that corrects the downstream plate cylinder to a normal reference position with respect to the upstream plate cylinder in order to match the print pattern, the upstream side of the two printing units of the respective printing units. The angles θ ₁ and θ ₂ around the axis between the key groove position and the temporary reference mark in the plate cylinder and the downstream plate cylinder are calculated, and the downstream plate cylinder is registered with respect to the upstream plate cylinder. The rotation angle θ ₃ for the following equation (1)
θ ₃ = 2 (n + 1) π + θ ₁ −θ ₂ −L / r + θ _α (n is an integer) (1)
Calculate with
After the plate cylinder is rotatably supported on the unit fixing side of each printing unit, the downstream plate cylinder is rotated by the rotation angle θ ₃ with respect to the upstream plate cylinder. Plate cylinder exchange method.

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