JPH0636842U - Plate retainer for printing machine - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate movement of the printing plate discharged from the plate vise and maintenance work of the printing unit, and to stabilize plate discharging. [Structure] Pulleys 43, 48 are provided at both upper and lower ends of the loader 36.
Was set up. The rope 4 is placed between the upper and lower pulleys 43, 48.
9 is stretched and driven by the motor 44.
A moving bar 53 is supported between the left and right ropes 49, and the moving bar 53 supports a pinch 57 and an air cylinder 55 for opening and closing the pinch 57.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printing plate holding device for holding a used old plate and a new plate to be used in a printing press.

[0002]

[Prior art]

 The plate cylinder of the printing machine is provided with a plate fixing device that fixes a plate (hereinafter simply referred to as a plate) in a state of being wound around the plate cylinder. That is, in the notch provided on the outer peripheral portion of the plate cylinder, the grip side plate vise that holds the edge of the plate on the grip side and fixes it, and then wraps around the peripheral surface of the plate cylinder. A plate vise device including a rear plate vise that holds and holds the rear end of the plate is extended in the axial direction of the plate cylinder.

A plate vise of this kind is opened and closed by a long vise base extending in the body axis direction and a swingable pivotal support supported by the vise that is driven by a cam or the like to rock. It is equipped with a holding plate that holds the plate in and out of the vise stand. The gripping surface of the vise table is provided with a reference pin that engages with a positioning notch provided on the plate-side edge.

When the plate is mounted on such a plate cylinder, the grip plate vice is made to face the work surface side, and then the cam is operated to open the grip plate of the grip plate vice. Insert the edge of the gripper side of the plate held in step 2 between the open gripper plate and the vise base, align the notch of the plate with the reference pin of the vise base, and position the gripper plate. Hold the edge of the plate by closing it.

Next, when the plate cylinder is rotated about one turn, the plate is wound around the peripheral surface of the plate cylinder, and the bottom plate vise faces the work surface, so that the bottom plate of the bottom plate vise is opened and closed. Then, the butt end of the plate is held in the butt plate vise, and then the butt plate vise is moved in the circumferential direction of the plate cylinder. Plate installation is complete.

When the specification of a printed matter is changed and the plate is replaced with the new plate from the old plate, the old plate is removed by a reverse operation to the mounting, and then the new plate is mounted as described above. The plates are replaced by.

However, in such conventional mounting of the plate, it is necessary to perform the operation of the cam for opening and closing the plate vise and the rotating operation of the plate cylinder manually or by the push button operation. Since this operation must be performed while holding the end portion by hand, not only a great deal of labor and skill is required, but there is also a problem in terms of work safety.

Therefore, the applicant of the present invention has proposed a plate holding device for plate exchange in which plate ejection and supply and plate cylinder rotation are automated, and is disclosed in, for example, JP-A-3-184848. Therefore, the outline of the configuration and operation will be described below.

This plate retainer is equipped with a loader in the shape of a rectangular frame that is rotatably pivotally supported and hung down on the upper end of the frame of an adjacent printing unit. It is configured to swing from the hanging storage state to a use state in which the leading end portion is brought close to the peripheral surface of the plate cylinder and is inclined.

Inside the loader, an old plate holding device that holds a plurality of used old plates that have been discharged from the plate cylinder and pulled up by an old plate gripping device, and a new plate holding device that holds a plurality of new plates to be used from now on It is equipped with a device and a new plate moving device that moves the new plates held by the new plate holding device one by one from the top to the plate cylinder. Among these, the old plate moving device is a loader that rotates by the plate cylinder. Suction ports that adsorb the central portion of the plate that has entered inside and move upward by an air cylinder or the like are provided in parallel in the left-right direction of the loader. Further, the new plate moving device is provided with a plurality of suction ports that adsorb the new plate and move downward by an air cylinder or the like in parallel in the left-right direction of the loader.

In this case, the gripping surface of the rear side plate vise extends in the radial direction of the plate cylinder, and the rear side end of the plate is bent at a right angle by a plate bending machine. A plate press roller is provided at the tip of the loader, and the plate wound around the body circumferential surface is pressed against the plate press roller so that the plate comes into close contact with the body peripheral surface. The plate presser roller or a separately provided plate presser roller is configured to press the bending piece at the butt end to insert it into the gripping surface.

In the printing plate exchanging device configured as described above, a plurality of new plates to be used during the printing operation are stacked in the order of use and held by the new plate holding device in the loader. When exchanging the plate, tilt the loader to the used state, then rotate the plate cylinder a predetermined angle and stop the butt plate vice against the lower end of the loader. The plate vise opens and the end of the used old plate on the buttocks side jumps out of the plate vise.Therefore, the plate cylinder rotates and the old plate enters the loader. The tail end is gripped and pulled up, and the pulled up old version is held by the old version holding device in the loader and stored in the loader.

Next, when the plate cylinder rotates by a predetermined angle and the gripping plate vise stops facing the lower end of the loader, the gripping plate vise opens and is held in advance by the new plate holding device in the loader. One of the new editions of the new edition is adsorbed by a plurality of suction ports provided on the new edition moving device, and these suction ports are driven by an air cylinder or the like to move downwards. The leading edge is inserted into the gripping surface of the plate vise while engaging the notch with the reference pin of the vise base, and the gripping plate is closed to grip the gripping edge of the new plate.

After that, the plate cylinder makes one full turn and the new plate is wound around the cylinder peripheral surface, and the rotation of the plate cylinder stops at the position where the plate-side vise is facing the work surface, and the plate-side plate is rotated. The end is gripped with a butt plate vise. When the new plate is wound, the plate press roller is pressed against the new plate, so the new plate comes into close contact with the body circumferential surface, and when the rear end of the rear plate vise is inserted, the plate press roller is Since the side end is pressed, it can be securely inserted.

[0015]

However, in such a conventional device, since the suction port as a plate suction member is provided at the center of the loader in the up-down direction, it moves up and down with a large stroke. However, there is a problem that a large space is required, maintenance and inspection work inside the printing unit is difficult when the loader is stored, and it is difficult to take out the old version stored in the loader. Further, there is a problem that an air cylinder with a large stroke is required, which increases costs. Furthermore, since the central portion of the plate in the up-down direction is adsorbed by the suction port when the plate is discharged, there is a problem that the plate is warped and the leading edge rises, making it difficult to stack several plates.

The invention also proposed by the present applicant and disclosed in Japanese Patent Application Laid-Open No. 3-174157 is such that a plate holding member such as a suction port or a hook-shaped member for holding and moving the plate is transferred. The structure is complicated because it stops once at the middle part of the moving stroke and waits, and moreover, because the plate discharge detection sensor is provided under the plate discharge storage part, multiple plates are used. There is a problem that it becomes difficult to store them continuously.

Further, the device disclosed in Japanese Patent Laid-Open No. 62-174157 is for discharging the old plate by vertically moving the bar of the plate holding device along a vertical slide rail. After holding the old plate on the bar side by opening and closing the plate vise claw and the bar side claw at the lower position of the plate holding device, raise the bar and pull the old plate out of the plate cylinder, Is configured to hold the old version.

However, in such a conventional apparatus, when the old plate is taken out to the printing machine, the claws holding the old plate are opened while the bar is raised. Not only is it poorly constructed and its structure is complicated, but it also requires a large amount of space on the left and right sides of the machine, which causes the machine to become large-sized. There is a problem that it is easy, and if it is driven on both sides, two motors are required, and it becomes difficult to rotate them synchronously.

The present invention has been made in view of the above points, and provides a plate holding device for a printing machine, which facilitates plate discharge and maintenance work of a printing unit, and enables stable plate discharge. It is an object.

[0020]

[Means for Solving the Problems]

 In order to achieve such an object, the present invention is directed to a printing machine in which a printing plate released from being fixed by a plate fixing device provided on a plate cylinder and discharged is received by a receiving portion and moved and held by a holding portion. In the plate holding device, the left and right driving mechanisms are driven in synchronization by the driving device, and the left and right driving mechanisms move between the receiving part and the holding part of the discharged plate supported at both ends. And a plate-holding member which is mounted on the support member and is opened and closed by a driving device to hold the discharged printing plate.

[0021]

[Action]

 When exchanging the printing plates, during printing, multiple printing plates to be used will be stacked and held in the loader. When the printing operation is completed, the loader tilts, the plate cylinder rotates, and the bottom plate vise of the plate cylinder faces the tip of the loader, and the holding surface of the bottom plate vise opens and the old plate Since the trailing edge is released from the grip and pops out from the gripping surface, when the plate cylinder rotates in this state, the trailing edge of the old plate enters the old plate receiving section in the loader.

When the trailing edge of the trailing edge reaches the plate holding member, the driving device closes the plate holding member to hold the old plate, and the driving device drives the left and right driving mechanisms in synchronization. The supporting members whose both ends are supported by the left and right driving mechanisms ascend together with the driving device and the plate holding member mounted on the supporting members. When the plate holding member supported by the support member reaches the plate holding portion, the drive mechanism stops the plate holding member and opens the plate holding member. It is held and stored in.

After that, the plate holding member in the loader moves while holding the new plate, and the edge of the gripper side is inserted into the gripper plate vise so that the notch of the new plate engages with the reference pin of the plate vise. , The gripping edge is gripped by closing the plate vise. Next, the plate cylinder makes one full rotation and the bottom plate vise stops at the position facing the tip of the loader, and the plate presser roller inserts the new plate's bottom end into the open bottom plate vise. Therefore, the vise on the butt side closes and the installation of the new version ends.

After the new plate is mounted in this way, the drive mechanism rotates in the reverse direction and the supporting member descends together with the plate-holding member for the old plate, so that the plate-holding member for the old plate returns to its original position. The printing plate holding member for the new plate is returned to the original position by the drive device.

[0025]

【Example】

 1 to 12 show an embodiment of a plate holding device for a printing press according to the present invention, FIG. 1 is a schematic side view of a loader, FIG. 2 is a schematic side view of a printing unit provided with a loader, and FIG. 4 is a front view of the holding device, FIG. 4 is a side view of the upper half of the loader provided with the drive unit of the old version lifting device, FIG. 5 is a side view of the upper half of the loader provided with the old version lifting device, and FIG. -VI sectional view, FIG. 7 is a side view of the plate ejection guide device, FIG. 8 is a partially cutaway front view of the plate ejection guide device, FIG. 9 is a side view near the plate ejection duct inlet, and FIG. 10 is a plate ejection entrainment prevention device. FIG. 11 is a side view of the lower end of the loader provided, FIG. 11 is a front view of the lower end of the loader provided with a plate discharge prevention device, and FIG. 12 is a side view of the new plate feeder.

In FIG. 1 and FIG. 2, for example, a plate cylinder 3 and a blanket cylinder 4 that is in contact with the plate cylinder 3 are axially supported at both ends on the left and right frames 2 of the printing unit 1 for the first color. In the outer peripheral notch, a gripper plate vise 5 and a bottom plate vise 6 are provided extending in the axial direction of the plate cylinder 3. The gripper side plate vise 5 is provided with a vise base 7 and a gripper plate 8 which is pivotally supported on the clamp plate 7, and the gripper plate 8 is opened and closed by a driving device described later to hold the plate gripper side. It is configured to hold the ends.

Further, the buttocks side plate vise 6 is provided with a vise base 9 and a holding plate 10 pivotally supported by the vise base 9, and the holding plate 10 is opened and closed by an opening / closing drive device described later to open the plate. It is configured to hold the hip end of the. The gripping surface of the gripping side plate vise 5 extends in the circumferential direction of the plate cylinder 3, and the gripping surface of the trailing side plate vise 6 extends in the radial direction of the plate cylinder 3.

The opening / closing drive device for the plate vices 5 and 6 will be described. An air cylinder 11 is pivotally supported on the upper end surfaces of the left and right frames 2 through a bracket 12 so that the tip of a rod 14 directly connected to a piston rod 13 of the air cylinder 11 is a frame. It is pivotally attached to one free end of an L-shaped lever 16 which is swingably supported by a bracket 15 on the upper end surface of the L-shaped lever 2.

The lower end of the rod 17, which has the upper end pivotally attached to the other free end of the L-shaped lever 16 and hangs down, is attached to the free end of a lever 18 pivotally attached to the frame 2 side. A pivot lever 19 integrated with the lever 18 and a cam shaft (not shown) that opens and closes the grip side plate vise 5 and the tail side plate vise 6 are connected by a cam lever (not shown) or the like. Connected in a non-bonded state. By doing so, when the piston rod 13 of the air cylinder advances and retracts at a predetermined timing, the gripping surfaces of the gripper plate vise 5 and the tail side plate vise 6 open and close at a predetermined timing.

Reference numeral 20 denotes a safety cover having a rectangular shape in a front view, which is formed by an upper cover 20a having an L-shaped cross section and a lower cover 20b having a linear cross section pivotally attached to a lower end thereof, and has an upper end of the upper cover. The upper portion is pivotally supported by a bracket 21 on the frame 2, and the lower end portion is attached to an upper working end of a piston rod 23 of an air cylinder 22 whose lower end portion is pivotally supported on a vertical surface of the frame 2. It is pivotally attached. As a result, when the piston rod 23 of the air cylinder 22 is retracted, the safety cover 20 covers the working surface side of the frame 2 as shown by the solid line in FIG. 2, and when the piston rod 23 advances from this state, As shown by the chain line in FIG. 2, the safety cover 20 is opened to open the work surface.

The second color printing unit 30 adjacent to the first color printing unit 1 is formed in the same manner as the first color printing unit 1, and the printing units 1 of the frames 31 on the left and right sides thereof are formed. An air cylinder 32 is pivotally mounted on the inner surface of the side upper part so as to be swingable, and the other end of a rod 34 whose one end is pivotally mounted on the inner surface of the frame 31 is pivotally mounted on the working end of the piston rod 33. ing. Further, one end of another rod 35 is pivotally attached to the working end of the piston rod 33, and the other end of this rod 35 is pivotally attached to the upper end portion of a loader 36 described below.

Therefore, the loader 36 as a plate holding device will be described. Both ends of a loader shaft 38 are rotatably supported by brackets 32 fixed to the upper end surfaces of the left and right frames 31 via bearings 39, and the main body of the loader 36 is a vertically long plate. The left and right side plates 40 each having a base shape fixed to both ends of the loader shaft 38 and hanging down, and connecting stays (not shown) that connect the left and right side plates 40 are formed into a rectangular frame in a front view. ing.

The left and right side plates 40 of the main body of the loader 36 are provided with recessed holes 40a at the upper end thereof, and these recessed holes 40a are bolted to the end faces of the side plates 40. The pulley shaft 42 on the bracket 41 side is engaged. A pulley 43 is rotatably fitted on each of the left and right pulley shafts 42, and a motor 44 as a drive device schematically shown in FIG. 3 is mounted on the center of the upper end of the loader 36. .

Between the motor pulley 45 of the motor 44 and the left and right pulleys 43, a rope 46 as an endless body is stretched around one side so that the left and right sides are rotated by the rotation of the motor pulley 45. The pulleys 43 are configured to rotate in opposite directions.

Further, tension brackets 47 are formed on the lower ends of the left and right loader side plates 40 so as to be vertically adjustable and bolted, and the left and right pulleys pivotally attached to the tension brackets 47. A rope 49 is stretched between the 48 and the upper pulley 43, and is driven by a motor 44 so that the left and right ropes 49 cause the inner running portions to run in the same direction. There is.

In FIG. 6, a reference numeral 50 as an enlarged sectional view taken along line VI-VI of FIG. 3 shows a plate 51 and a holding plate 52 for sandwiching the inner traveling portion of the rope 49 traveling vertically, and left and right plates thereof. It is a support member formed by a moving bar 53 connecting 51 and is movably supported along the side plate 40 as shown by a solid line and a chain line in FIG. 3, and is fixed to the central portion of the moving bar 53. An air cylinder 55 is fixed to the holder 54 thus formed.

A pinch holder 56 is fixed to the back surface of the moving bar 53 so as to correspond to the air cylinder 55. At the lower end of the pinch holder 56, a hook-shaped plate holding member is formed. The pinch 57 is pivotally attached to the piston rod 58 of the air cylinder 55 with its free end pivotally attached.

As a result, when the piston rod 58 of the air cylinder 55 advances, the pinch 57 in the solid line position moves to the chain line position, hooks the bent portion of the plate 59 that has entered the loader 36, and in this state. The plate 59 is configured to be pulled up by the rope 49 traveling upward.

Further, in this apparatus, the opening and closing of the pinch 57 is configured to be performed by detection of the sensor. That is, the lower end portion of the loader 36 is provided with a duct 60 that expands toward the lower end, and the old plate 59 released from the grip of the plate-side plate vise 6 of the plate cylinder 3 is rotated by the plate cylinder 3 to cause the duct 60 to rotate. A projector 61 as a fixed sensor is provided at the entry position, and a light receiver 62 as a movement sensor is provided on the pinch holder 56 side. Further, at the plate discharge completion position, a light emitter 63 corresponding to the raised light receiver 62 is fixed to a stay 64 connecting the left and right side plates 40.

By doing so, when the used old plate 59 enters the duct 60 while the pinch 57 is descending, the light from the projector 61 to the photoreceiver 62 is blocked and the piston rod of the air cylinder 55 is blocked. 58 is moved forward, and the pinch 57 hooks the old version 59. When the pinch 57 rises to the plate discharge completion position, the light from the light projector 63 to the light receiver 62 is blocked and the piston rod 58 of the air cylinder 55 retracts, so that the pinch 57 releases the old plate 59 from being hooked. It is composed of Reference numeral 65 is a plate guide for guiding the rising of the old plate 59.

Next, a guide device for guiding the old plate 59 which is released from the grip of the plate vise 6 of the plate cylinder 3 and enters the duct 60 of the loader 36 will be described. That is, a stud 70 is projected from the side plate 40 at the lower end portion of the loader 36, and a roller lever 71 is rotatably attached to the stud 70 with its snap ring 72 restraining its axial movement. A compression coil that is fitted between the free end portion of the roller lever 71 and the stud 73 protruding from the side plate 40 and that urges the roller lever 71 to rotate counterclockwise in FIG. 7. The spring 74 is interposed.

Further, at the lower end portion of the loader 36, a pawl shaft 75 is rotatably supported by both side plates 40 at both ends so that the pawl shaft 75 is rotatably supported, and a lever 76 fixed to the pawl shaft 75 is provided. A rod 77 connects the free end portion and the free end portion of the roller lever 71. Further, a roller 79 corresponding to the bearer 3a of the plate cylinder 3 is rotatably fitted to one end of a connecting pin 78 for connecting the roller lever 71 and the rod 77, and the claw shaft 75 has a plurality of rollers 79. The individual claw 80 is fixed.

By doing so, when the loader 36 is stored with the lower end portion of the loader 36 separated from the plate cylinder 3, the roller 79 is separated from the bearer 3 a, and the roller lever 71 is elastically driven by the compression coil spring 74. 7 is rotated counterclockwise in FIG. 7, and the rod 77 and the lever 76 are moved to the chain line position in FIG. Therefore, the pawl 80 closes the inlet of the duct 60 as shown by the chain line in FIG. 9, but when the loader 36 is tilted from this state to the used state, the roller 79 acts on the elastic force of the compression coil spring 74. Since it is pushed by the bearer 3a against it, the pawl 80 moves to the position shown by the solid line in FIG. 9 via the rod 77 and the lever 76 to open the inlet of the duct 60.

Next, the plate discharge prevention device will be described with reference to FIGS. 10 and 11. That is, at a position near the outside of the inclined surface of the duct 60, a lever 81 formed in a dogleg shape is rotatably attached to a stay 82 connecting the left and right side plates 40. A dock 83 is attached to the lower end of the duct so as to be exposed below the duct 60. The lever 81 is provided between the lever 81 and the block 84 on the duct 60 side, and the lower half of the lever 81 is attached to the duct 60. A compression coil spring 85, which urges the inclined surface so as to come into close contact with the inclined surface, is interposed.

The upper end of the lever 81 is brought into contact with a sensor 87 fixed to a bracket 86 on the side of the block 84, so that the plate discharging operation is enabled. By doing so, the lever 81 comes into contact with the sensor 87 in the normal state to enable the plate ejection operation. However, if the old plate 59 is mistakenly caught between the duct 60 and the plate cylinder 3, the old plate 59 will be ejected. 59 pushes the dock 83 to rotate the lever 81, and the upper end of the lever 81 moves away from the sensor 87, so that the plate discharging operation is stopped.

Further, a plurality of rollers 89 are rotatably fitted to the lever shaft 88 rotatably mounted between the left and right side plates 40 while their axial movements are restricted. A plurality of roller levers 90 are fixed to the lever shaft 88, and a plate pressing roller 91 is pivotally attached to the free end of each roller lever 90. A drive device (not shown) for rotating the lever shaft 88 at a predetermined timing is connected to the lever shaft 88, and the plate pressing roller 91 is pressed against the plate wound around the body circumference by the rotation of the lever shaft 88. It is configured to

Next, a new plate supply device for holding a new plate to be used and supplying it to the plate vise 5 of the plate cylinder 3 will be described. That is, on the front surface side of the loader 36, a plurality of new plates 92 prepared in advance during the printing operation are stored, and the U-shaped reference pin holes provided in the new plate 92 are stored. It is engaged with a first reference pin 93, which is located above the plate pressing roller 91 and projects from the surface of the loader 36.

A second reference pin 94 is provided on the surface of the loader 36 so as to protrude below the housed plate pressing roller 91. Inside the left and right side plates 40, an up / down air cylinder 95 having a short stroke is mounted. The piston rod 96 and the rod 97 directly connected thereto are L-shaped on the side plate 40 side. One of the upper and lower levers 98 and 99, which is rotatably pivotally mounted and constitutes a link mechanism together with the rod 97, is pivotally mounted.

The other free ends of the levers 98 and 99 are pivotally attached to the upper and lower ends of the plate-less rodless cylinder 100. Reference numeral 101 denotes a bracket provided by connecting movable parts of the left and right rodless cylinders 100, and a suction port 102 connected to a suction air source is mounted on the surface of the bracket, and the new plate 92 is sucked and moved. Is configured to let.

That is, when the piston rod 96 of the air cylinder 95 is retracted from the illustrated state, the upper and lower levers 98 and 99 connected by the rod 97 synchronously rotate in the clockwise direction in FIG. Since the new plate 92 adsorbed by is separated from the surface of the loader 36 and the notch is removed from the first reference pin 93, when the rodless cylinder 100 is operated and the piston rod 96 of the air cylinder 95 is moved, the new plate 92 is moved. Is moved so that the notch engages with the second reference pin 94, and the new plate 92 is held in this state.

Further, in FIGS. 1 and 12, the air cylinders 105 are fixed to the left and right side plates 40, and the bracket 107 fixed to the working end of the piston rod 106 thereof serves as a suction air source. The connected suction port 108 is attached. By doing so, when the suction port 108 in the retracted position shown by the solid line in the figure adsorbs the new plate 92 having the notch engaged with the second reference pin 94, when the piston rod 106 moves forward, The suction port 108 is moved to the chain line position so that the old plate 92 is inserted into the grip surface of the grip plate vice 5. It should be noted that the second reference pin 94 is configured to automatically retract into the pin hole during this movement.

A plate replacement operation by the plate supply device configured as described above will be described. When exchanging the printing plates, a plurality of new plates 92 to be used that are to be used in advance are stacked on the front side of the loader 36 during the printing operation and stored, and the U-shaped plate provided on the new plates 92 is stored. The reference pin hole is engaged with and held by the first reference pin 93 provided on the surface of the loader 36.

When the printing work is completed, when the piston rod 23 of the air cylinder 22 is advanced, the safety cover 20 covering the work surface side is opened and the work surface is opened. The piston rod 33 is advanced to tilt the loader 36 in the suspended and retracted state, and the leading end portion thereof is brought close to the peripheral surface of the plate cylinder 3.

When the loader 36 tilts, the roller 79 is pushed by the bearer 3a of the plate cylinder 3 against the elastic force of the compression coil spring 74, so that the inlet of the duct 60 is opened as shown by the chain line in FIG. The closed claw 80 moves to the solid line position in FIG. 9 via the rod 77 and the lever 76, and the inlet of the duct 60 is automatically opened.

After the loader 36 is set as described above, when the plate cylinder 3 is rotated by a predetermined angle and the trailing side plate vise 6 is stopped at a position facing the tip of the loader 36, the air cylinder 11 is moved. Since the gripper surface of the butt plate vise 6 is opened by operation, the old plate 59 is released from the grip, and as shown in FIGS. 2 and 9, the butt end of the old plate 59 pops out from the grip surface and strikes. It is in contact with the lid 103.

Since the plate cylinder 3 rotates in this state, the old plate 59 is guided by the duct 60 and enters the loader 36. Since the pawl 80 is opened as described above when entering, the pawl 80 is not pressed against the old plate 59 by the spring force as in the conventional case, and the old plate 59 is not damaged.

When the old plate 59 enters, the projection of light from the projector 61 fixed at the entrance position to the light receiver 62 of the plate holding device stopped at the lowered position is interrupted by a signal from the light receiver 62. Since the piston rod 58 of the air cylinder 55 moves forward, the pinch 57 hooks the bent portion of the old version 59. At the same time, the motor 44 rotates, the pulley 43 rotates, and the inner traveling portion of the rope 49 travels upward, whereby the old plate 59 is pulled up.

When the pinch 57 gripping the old plate 59 rises to the plate discharge completion position, the light from the projector 63 as a fixed sensor to the light receiver 62 as a movable sensor is blocked, the motor 44 is stopped, and the rope 49 of the rope 49 is stopped. Since the traveling is stopped, the pinch 57 holding the old plate 59 stops rising, and the piston rod 58 of the air cylinder 55 retracts, and the pinch 57 releases the old plate 59 from being hooked. The released old version 59 is stored in the loader 36 while being supported by the stopper 104 shown in FIG.

While the discharging operation of the old version 59 is being performed, the new version 92 is moved at the same time. That is, when the piston rod 96 of the air cylinder 95 is retracted from the illustrated state during the plate discharge operation, the levers 98 and 99 synchronously rotate in the clockwise direction in FIG. 12, and the new plate 92 adsorbed by the suction port 102 is loaded into the loader 36. Since the notch is disengaged from the surface of the first reference pin 93, the rodless cylinder 100 operates and the piston rod 96 of the air cylinder 95 moves, so that the new plate 92 moves. Then, the notch is held in a state of being engaged with the second reference pin 94. Then, the new plate 92 is sucked from the suction port 102 to the suction port 108 and held, and the bracket 101 to which the suction port 102 is attached returns to the original position. The rodless cylinder 100 also returns to its original state.

When the discharge of the old plate 59 is completed, the plate cylinder 3 is slightly rotated to the position where the gripper plate vise 5 faces the tip of the loader 36 and stops, and at the same time, the piston rod of the air cylinder 105 is stopped. As the bracket 106 moves forward and the bracket 107 fixed to its working end and the suction port 108 attached thereto move from the solid line position to the chain line position, the new plate 92 adsorbed by the suction port 108 moves and its gripping side. The end portion is inserted into the grip surface of the grip side plate vise 5, and the notch of the new plate 92 engages with the reference pin.

By closing the gripping surface in this state, the gripping side end of the new plate 92 is gripped. When moving the new plate 92, the second reference pin 94 automatically retracts into the pin hole, so that the moving new plate 92 is not touched.

Next, when the plate cylinder 3 rotates, the new plate 92 is wound around the peripheral surface of the plate cylinder 3. At this time, since the presser roller 89 presses the new plate 92, the new plate 92 is wrapped around the plate cylinder 3. Stick to the face. When the bent portion formed at the rear end of the new plate 92 corresponds to the gripping surface of the rear plate vise 6, the roller lever 90 swings and the plate presser roller 91 pivotally attached to the free end of the roller is moved. Since the bent portion of the new plate 92 is pushed, the bent portion is pushed into the holding surface of the rear side plate vise 6, and when the holding surface is closed in this state, the bent portion is surely held.

As described above, when the new plate 92 is supplied to the plate cylinder 3, the new plate 36 held by the loader 36 by engaging the notch with the first reference pin 93 is immediately supplied to the plate vise. Instead of being positioned, the notch is engaged with the second reference pin 94 once, and the positioning is performed with the notch being held by the loader 36, and then the positioning is performed by supplying the plate vise to position the suction port 102 and the suction port 108. The movement stroke is shortened, and the new plate 92 is accurately supplied without bending. Further, since the new plate 92 can be moved by half of the total stroke during the discharging operation of the old plate 59, the supply time of the new plate 92 is shortened.

After the discharge of the old plate 59 and the supply of the new plate 92 are completed in this way, the air cylinder 32 operates and the loader 36 swings, and the leading end of the loader 36 separates from the plate cylinder 3 in a suspended storage state. Stop.

When the old plate 59 enters the duct 60 as described above, the old plate 59 may try to be wound between the duct 60 and the plate cylinder 3. In this case, the front end portion of the old plate 59 may be wound. By pushing the dock 83 to rotate the lever 81, the upper end of the lever 81 is separated from the sensor 87 and the plate discharging operation is stopped, which is safe.

Although the rope 49 is illustrated as the endless body in this embodiment, a timing belt or a chain may be used. Further, the endless drive device may be a torque motor or an air-pressure actuator.

Further, in the present embodiment, the projectors 61 and 63 and the light receiver 62 are illustrated as the sensors for detecting the entry of the old version 59 into the loader 36 and the arrival at the holding position, but the drive device and the movement of the support member are illustrated. The mechanism may be provided with a sensor such as a rotary encoder.

Further, in the present embodiment, the drive mechanism including the motor 44, the pulley 43, the rope 46 and the like is illustrated as the support member drive mechanism, but a ball screw, a rack, a pinion or the like may be used.

[0069]

[Effect of device]

 As is clear from the above description, according to the present invention, the printing plate released from the fixation by the plate fixing device provided on the plate cylinder and discharged is received by the receiving portion and moved and held by the holding portion. In a plate holding device of a printing press, a left and right driving mechanism driven synchronously by a driving device, and a receiving part and a holding part for the ejected plate whose both ends are supported by these left and right driving mechanisms. A large space is provided in the central part in the vertical direction of the loader by providing a support member that moves between the two and a plate holding member that is mounted on the support member and is opened and closed by a driving device to hold the discharged printing plate. This makes it easier to perform maintenance and inspection work in the printing unit and to take out the old version stored in the loader, greatly improving workability.

[Brief description of drawings]

FIG. 1 is a schematic side view of a loader.

FIG. 2 is a schematic side view of a printing unit provided with a loader.

FIG. 3 is a front view of an old version holding device.

FIG. 4 is a side view of an upper half of a loader provided with a drive unit of an old version pulling device.

FIG. 5 is a side view of the upper half of the loader provided with the old version pulling device.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a side view of a plate discharge guide device.

FIG. 8 is a partially cutaway front view of the plate discharge guide device.

FIG. 9 is a side view near the entrance of the plate discharge duct.

FIG. 10 is a side view of the lower end of the loader provided with a plate discharge prevention device.

FIG. 11 is a front view of the lower end portion of the loader provided with the plate discharge prevention device.

FIG. 12 is a side view of the new edition supply device.

[Explanation of symbols]

 3 plate cylinder 5 gripper plate vise 6 bottom plate vise 36 loader 43 pulley 44 motor 45 motor pulley 46 rope 48 rope 55 air cylinder 57 pinch 58 piston rod 59 old version

Claims (1)

[Scope of utility model registration request] 1. A printing plate holding device of a printing press, wherein a printing plate released from being fixed by a printing plate fixing device provided on a plate cylinder and discharged is received by a receiving portion, moved and held by a holding portion. Left and right drive mechanism that is driven in synchronization with
Both ends of the discharge plate are supported by these left and right driving mechanisms and move between a receiving part and a holding part of the discharged printing plate, and the discharge printing device is mounted on the supporting member and is opened and closed by a driving device. A plate holding device for a printing press, comprising a plate holding member for holding a plate.