JP4015720B2 - Method for collecting printing sheet materials - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for stacking printing sheet materials for stacking sheet materials in which slip sheets are bonded to one surface of a thin metal plate in a bundle.
[0002]
[Prior art]
For example, as a PS plate for lithographic printing, a metal thin plate in which a photosensitive composition is provided in a layer form on a support such as an aluminum plate having a plate thickness of 0.12 mm to 0.4 mm is used. In general, a PS plate as a product is accommodated in a cardboard box and transported. Therefore, in order to protect the photosensitive composition on the support, a slip sheet is provided on the surface of the PS plate on the photosensitive composition side. Is electrostatically bonded.
[0003]
In order to manufacture this type of PS plate, for example, an apparatus disclosed in JP-A-61-241096 is known. This apparatus includes a metal web winding shaft in which a metal web is wound in a roll shape, and a slip sheet web winding shaft in which a slip sheet web is wound in a roll shape. The metal web and the interleaf web fed from these winding shafts are brought into close contact with each other by a pair of rollers, and then charged with each other through a charging means to obtain a sheet material web. Next, a sheet material having a predetermined length is cut by a cutter, and the sheet material is conveyed to a stacking position via a conveyor or the like.
[0004]
At this stacking position, it is necessary to securely absorb shocks, particularly for sheet materials of various sizes. This is because, if the impact absorption of the sheet material is not reliably performed, the sheet material may be broken or nicked. For this reason, for example, as disclosed in Japanese Patent Publication No. 6-10065, the sheet material is received by using a plurality of stoppers having different conditions such as the weight of the movable part, the elastic coefficient, and the damping coefficient. There is known a stopper device that aligns a predetermined position.
[0005]
[Problems to be solved by the invention]
By the way, the sheet material differs greatly in plate thickness, width dimension and cut length, and the feeding speed with respect to the stacking position may vary. At that time, for example, when sheet materials having a plate thickness of 0.15 mm, a width of 450 mm, and a cut length of 400 mm are stacked at a rate of 60 mm / min, a plate thickness of 0.4 mm, a width of 1460 mm, and a cut length However, when a sheet material of 1100 mm is accumulated at a speed of 130 mm / min, a considerably large difference is generated in the momentum of each sheet material (in practice, a difference in momentum of about 180 times occurs).
[0006]
However, in the above-described conventional technology, it is not possible to cope with this kind of fluctuation of momentum by a single stopper device. For this reason, in order to attach a stopper device suitable for each sheet material, the line is stopped and the stopper device is exchanged, or a sheet material having a large thickness or size is set at a low speed. As a result, a complicated and time-consuming preparatory work associated with the change of the sheet material is required, and there is a problem that the entire sheet material stacking operation cannot be efficiently performed.
[0007]
The present invention solves this type of problem and provides a method for stacking printing sheet materials that can efficiently and smoothly stack various different sheet materials without causing folds or nicks. The purpose is to do.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides the following sheet material in order to stack the sheet material, for example, electrostatically adsorbed on one surface of the thin metal plate in a bundle shape at the stacking position. The sheet material is fed to the accumulation position while sliding on the interleaving sheet of the previous sheet material arranged at the accumulation position, and then the next sheet material is subjected to shock absorption.
[0009]
Here, it has the process of decelerating this sheet material before the process of absorbing the impact of the sheet material. Specifically, the following sheet material is effectively decelerated via the frictional force Oyo BiShizu electrical attractive force generated between the paper if the previous sheet material. Thereby, it is possible to prevent the leading end of the sheet material from being deformed at the time of collision between the sheet material and the buffer mechanism, and it is possible to effectively prevent the sheet material from being bent or the like.
[0010]
In addition, the sheet material collides with the buffer mechanism while sliding on the previous sheet material. For this reason, even when a sheet material with a relatively large curl or a sheet material with a non-uniform curl is used in the width direction, the leading edge of the sheet material can be held in a horizontal position across the width direction, preventing breakage. Is possible.
[0011]
This sheet material is obtained by cutting a sheet material web in which a metal thin plate web and a slip sheet web are electrostatically adhered. Accordingly, the sheet material is formed continuously and automatically, and the entire stacking operation of the sheet material is efficiently performed.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic configuration explanatory diagram of a sheet material accumulating apparatus 10 according to an embodiment of the present invention.
[0013]
The stacking apparatus 10 includes a PS plate rewinding mechanism 14 that feeds out a PS plate web 12 that is a thin metal web, an interleaf unwinding mechanism 18 that feeds out a slip sheet web 16, and the slip sheet on one surface of the PS plate web 12. An adhesive mechanism 22 for bonding the web 16 to form a sheet material web 20, a cutting mechanism 26 for cutting the sheet material web 20 into a predetermined length to obtain a sheet material 24, and the sheet material 24 A transport mechanism 30 for feeding the next sheet material 24b to the stacking mechanism 28 while sliding the sheet material 24b on the previous sheet material 24a disposed in the stacking mechanism 28 in order to collect the bundle in the stacking mechanism 28; And a buffer mechanism 32 that absorbs the impact of the next sheet material 24b fed onto the previous sheet material 24a.
[0014]
The PS plate rewinding mechanism 14 has a winding shaft 34 for winding the PS plate web 12, and this winding shaft 34 is rotated in the direction of arrow A via a rotation drive source (not shown). A joining mechanism 36 and a plurality of rollers 38 are provided in the vicinity of the PS plate rewinding mechanism 14, and a decurling mechanism 40 is provided on the downstream side of the rollers 38. The decurling mechanism 40 includes a plurality of decurling rollers 42 a to 42 d having a smaller diameter than the roller 38.
[0015]
The interleaf unwinding mechanism 18 is configured in substantially the same manner as the PS plate unwinding mechanism 14, and includes a winding shaft 44 that is rotatable in the direction of arrow B under the action of a rotational drive source (not shown). A paper web 16 is wound. A plurality of rollers 46 are disposed in the vicinity of the interleaf rewinding mechanism 18.
[0016]
The adhesion mechanism 22 includes a pair of nip rollers (contact means) 48 that closely contacts the PS plate web 12 and the slip sheet web 16 fed from the PS plate unwinding mechanism 14 and the slip sheet unwinding mechanism 18, and the closely contacted PS plate web 12. And charging means 50 for electrostatically adsorbing the interleaf paper web 16 to each other. As shown in FIG. 2, the charging unit 50 includes an electrode 52 and a ground 54, and the electrode 52 and the ground 54 are disposed across the width direction of the sheet material web 20.
[0017]
A slitter mechanism 56 is disposed downstream of the charging unit 50. The slitter mechanism 56 has a pair of slitter blades 58 for cutting the sheet material web 20 into a predetermined width dimension. A feed roller pair 60 is disposed downstream of the slitter mechanism 56, and the feed roller pair 60 is rotationally driven in the direction of arrow C via a drive motor (not shown).
[0018]
The cutting mechanism 26 is disposed close to the downstream side of the feed roller pair 60 and includes an upper blade 62 and a lower blade 64. The upper blade 62 and the lower blade 64 cut the sheet material web 20 by a predetermined length while advancing and retreating in the transport direction (arrow X direction) via a driving unit including a motor (not shown), and the PS plate 12a and the interleaf The sheet material 24 adsorbed to each other is continuously formed.
[0019]
The transport mechanism 30 includes a plurality of transport conveyors 66a to 66c arranged in the transport direction, and a gate means 68 is disposed between the transport conveyors 66a and 66b. Below the gate means 68, a discharge portion 70 for discharging defective products is installed.
[0020]
As shown in FIG. 3, the stacking mechanism 28 stacks one side surface 72 a of the sheet material 24 sequentially fed from the conveyer 66 c on the stacking table 76 by aligning the side surfaces 72 a with a first side stopper 74 that can be adjusted in position. And a second side stopper 78 disposed on the opposite side of the first side stopper 74 and capable of adjusting the position of the other side surface 72b of the sheet material 24, and directing air in the closing direction (arrow X direction). And a sheet material rear end stopper 82 having an air ejecting means 80 for ejecting.
[0021]
As shown in FIGS. 3 and 4, the first and second side stoppers 74 and 78 include vertical portions 74 a and 78 a that extend in the vertical direction in order to align the width direction of the sheet material 24, and the sheet material 24. In order to guide on the stacking table 76 which is the stacking position, the upper portions of the vertical portions 74a and 78a are integrally provided with inclined portions 74b and 78b which are inclined by a predetermined angle θ ° in directions away from each other.
[0022]
As shown in FIG. 3, the air ejecting means 80 has a plurality of air nozzles 84a aligned in the arrow Y direction in order to eject air in the arrow X direction with respect to the sheet material 24 fed from the conveyor 66c. To 84e. The air nozzles 84a to 84e are formed on the sheet material rear end stopper 82, and are connected to the blowers 88a to 88e via the pipe lines 86a to 86e.
[0023]
The buffer mechanism 32 is disposed in front of the stacking mechanism 28 in the direction of the arrow X. The buffer mechanism 32 includes a leading end stopper plate 90 with which the leading end 72c of the sheet material 24 loaded from the conveyor 66c abuts, and a spring 92 for buffering an impact generated when the sheet material 24 abuts.
[0024]
The operation of the integration apparatus 10 configured as described above will be described below in relation to the integration method according to the present embodiment.
[0025]
First, a PS plate web 12 made of an aluminum thin plate (JIS alloy number 1050) having a thickness of 0.2 mm and a width of 1310 mm is used as a support for the PS plate 12a, while a natural pulp is 100% thick. Was used, and an interleaf web 16 having a width of 0.05 mm and a width of 1310 mm was used. As other conditions, the feeding speed of the PS plate unwinding mechanism 14 and the slip sheet unwinding mechanism 18 is 90 m / min, and the diameters of the decurling rollers 42 a to 42 d constituting the decurling mechanism 40 are in the range of 30 mm to 80 mm. 60 mm, the diameter of the nip roller pair 48 is 250 mm, the width of the sheet material web 20 cut by the slitter mechanism 56 is 1300 mm, the length of the sheet material 24 cut by the cutting mechanism 26 is 1120 mm, and the conveyance speed of the conveyance mechanism 30 is It was set to 110 m / min.
[0026]
Further, as shown in FIG. 2, stainless steel having a diameter of 3 mm and a length of 15 mm is used as the electrode 52 of the charging means 50, and 72 pieces are arranged at a pitch of 20 mm in the width direction of the sheet material web 20. The distance H between the electrode 52 and the sheet material web 20 was set between 20 mm and 100 mm, and 35 mm in this embodiment. The charging voltage was set to -8 kv.
[0027]
In addition, the first and second side stoppers 74 and 78 constituting the stacking mechanism 28 were set at target positions with respect to the center of the transport conveyor 66c, and the distance between them was set to 1301 mm. The inclination angle θ of the inclined portions 74b and 78b of the first and second side stoppers 74 and 78 was set to 20 °.
[0028]
The spring 92 constituting the buffer mechanism 32 was set so that the distance between the sheet material rear end stopper 82 and the front end stopper plate 90 was 1120 mm while being pushed in by 3 mm. The wind speed of the air sprayed from each of the air nozzles 84a to 84e provided on the sheet material rear end stopper 82 was set to 5 m / sec, and each outlet was set to have a width of 10 mm and a length of 50 mm.
[0029]
Therefore, when the winding shaft 34 constituting the PS plate rewinding mechanism 14 is rotated in the direction of arrow A via a rotation drive source (not shown), the PS plate web 12 wound around the winding shaft 34 is moved to the roller 38. It is paid out to the side. The PS plate web 12 is conveyed from the roller 38 to the decurling mechanism 40, subjected to curl correction via a plurality of decurling rollers 42 a to 42 d, and then conveyed to the nip roller pair 48 side constituting the bonding mechanism 22.
[0030]
On the other hand, in the interleaf rewinding mechanism 18, the winding shaft 44 is rotated in the direction of arrow B under the action of a rotation drive source (not shown). For this reason, the interleaf web 16 wound around the winding shaft 44 is fed to the roller 46 side and conveyed to the nip roller pair 48 side. The PS plate web 12 and the interleaf paper web 16 are pinched by the nip roller pair 48 and are in close contact with each other, and are electrostatically adsorbed by the charging means 50 to form the sheet material web 20.
[0031]
Next, the sheet material web 20 is cut to a width of 1300 mm by a slitter blade 58 constituting the slitter mechanism 56, and then sent to the cutting mechanism 26 side via the feed roller pair 60. Under the action of the blade 62 and the lower blade 64, the sheet material 24 cut to a length of 1120 mm is obtained. The sheet material 24 is fed into the laminating mechanism 28 at a speed of 110 m / min under the action of the transport conveyors 66 a to 66 c constituting the transport mechanism 30.
[0032]
The next sheet material 24 b put into the stacking mechanism 28 falls onto the previous sheet material 24 a arranged on the stacking table 76 under the guiding action of the first and second side stoppers 74 and 78. At that time, air is ejected from the plurality of air nozzles 84a to 84e constituting the air ejecting means 80 in the direction of the arrow X in FIGS. Therefore, the leading end 72c of the next sheet material 24b does not collide with the previous sheet material 24a, and proceeds smoothly in the direction of the arrow X while sliding on the previous sheet material 24a (FIGS. 6 and 7). reference).
[0033]
In this case, in this embodiment, the PS plate 12a constituting the next sheet material 24b moves while sliding on the interleaf paper 16a constituting the previous sheet material 24a. Accordingly, a frictional force acts between the PS plate 12a of the next sheet material 24b and the slip sheet 16a of the previous sheet material 24a. Further, due to the difference between the charging voltage of the PS plate 12a and the charging voltage of the interleaf paper 16a, an electrostatic adsorption force acts between the next sheet material 24b and the previous sheet material 24a.
[0034]
Thereby, the next sheet material 24b is decelerated all at once, and the impact when the next sheet material 24b collides with the leading end stopper plate 90 constituting the buffer mechanism 32 is effectively reduced. For this reason, when the next sheet material 24b collides with the front end stopper plate 90, the front end 72c of the next sheet material 24b can be prevented from being deformed, and the next sheet material 24b is not bent or nicked. The effect that it becomes possible to prevent generation | occurrence | production reliably is acquired.
[0035]
Specifically, when the respective sheet materials 24 are directly stacked using a conventional stacking apparatus, the generation rate of defective products is about 3%, whereas in this embodiment, the generation rate of defective products is Became 0%.
[0036]
In particular, in the present embodiment, when the thickness, width dimension, and cut length of the sheet material 24 are greatly different or when the input speed of the sheet material 24 varies, there is no need to change the equipment, The impact when the sheet material 24 collides with the buffer mechanism 32 can be effectively reduced. Therefore, even if various different sheet materials 24 are used, it is not necessary to prepare for each sheet material 24, and the entire stacking operation of the sheet materials 24 can be performed efficiently.
[0037]
When the next sheet material 24b collides with the buffer mechanism 32 while sliding on the previous sheet material 24a, the sheet material 24 having a relatively large curl or the sheet material 24 having a non-uniform curl in the width direction is used. However, the front end 72c of each sheet material 24 can be held in a horizontal posture over the width direction. Thereby, even if it is the sheet material 24 which has various curls, there exists an advantage that it becomes possible to prevent reliably that this sheet material 24 generate | occur | produces a bend.
[0038]
By the way, when the next sheet material 24b collides with the front end stopper plate 90 constituting the buffer mechanism 32, as shown in FIG. 8, the next sheet material 24b and the front end stopper plate 90 are integrated in the arrow X direction. Move on. Then, the front end stopper plate 90 pushes the next sheet material 24b back to the sheet material rear end stopper 82 side through the elastic force of the spring 92 engaged with the front end stopper plate 90 (see FIG. 9). Therefore, the next sheet material 24b is held by the sheet material rear end stopper 82 and the front end stopper plate 90 and stopped and stacked on the previous sheet material 24a.
[0039]
【The invention's effect】
As described above, in the stacking method of printing sheet materials according to the present invention, the next sheet material is sent to the stacking position while sliding on the interleaf of the previous sheet material arranged at the stacking position. Before the shock absorbing process, the sheet material is effectively decelerated through the frictional force and electrostatic attraction force generated between the sheet material and the previous sheet material.
[0040]
Thereby, the impact when the next sheet material collides with the shock absorbing mechanism is greatly reduced, and when the sheet material collides with the shock absorbing mechanism, the leading edge of the sheet material can be prevented from being deformed, It is possible to prevent the sheet material from being bent. In addition, even when using various sheet materials having different dimensions and input speeds, it is possible to perform efficient and highly accurate sheet material accumulation work without changing facilities.
[0041]
Also, since the sheet material slides on the previous sheet material and collides with the buffer mechanism, even if a sheet material with a relatively large curl or a sheet material with a non-uniform curl in the width direction is used, the leading edge of each sheet material Can be held in a horizontal posture over the width direction. Therefore, even if the sheet material has various curls, the sheet material can be prevented from being bent.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a sheet material accumulating apparatus according to an embodiment of the present invention.
FIG. 2 is a schematic configuration explanatory view of a charging unit constituting the integrated device.
FIG. 3 is a schematic perspective explanatory view of a stacking mechanism and a buffer mechanism constituting the stacking device.
FIG. 4 is a schematic plan view illustrating the stacking mechanism and the buffer mechanism.
FIG. 5 is a schematic side view for explaining the operation when the next sheet material is charged into the laminating mechanism.
FIG. 6 is a schematic side view for explaining the operation when the next sheet material slides on the previous sheet material.
FIG. 7 is a schematic side view for explaining the operation when the next sheet material slides on the previous sheet material.
FIG. 8 is a schematic side view for explaining the operation when the next sheet material collides with the buffer mechanism.
FIG. 9 is a schematic side view illustrating an operation when the next sheet material is pushed back through the buffer mechanism.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Accumulator 12 ... PS plate web 12a ... PS plate 14 ... PS plate rewinding mechanism 16 ... Interleaf web 16a ... Interleaf 18 ... Interleaf paper unwinding mechanism 20 ... Sheet material web 22 ... Adhesion mechanism 24, 24a, 24b ... Sheet material 26 ... Cutting mechanism 28 ... Lamination mechanism 30 ... Conveyance mechanism 32 ... Buffer mechanism 34, 44 ... Winding shaft 38, 46 ... Roller 40 ... Decal mechanism 48 ... Nip roller pair 50 ... Charging means 56 ... Slitter mechanisms 66a to 66c ... Conveyance Conveyors 74, 78 ... Side stopper 76 ... Stacking stand 80 ... Air injection means 82 ... Sheet material rear end stopper 90 ... Front end stopper plate 92 ... Spring

Claims (1)

A first step of closely attaching the thin metal sheet web and the interleaf paper web;
A second step of electrostatically adsorbing the sheet metal web and the interleaf paper web to obtain a sheet material web;
A third step of cutting the sheet material web to obtain the printing sheet material;
In order to accumulate the printing sheet material in a bundle at the accumulation position, the next printing sheet material is fed to the accumulation position while sliding on the slip sheet of the previous printing sheet material arranged at the accumulation position. A fourth step;
While jetting air to the front of the printing sheet on, by contacting the metal sheet constituting the next printing sheet and the interleaf paper of the front of the printing sheet, the front of the printing a fifth step of decelerating the printing sheet of said next through the electrostatic force caused by the difference between the charging voltage and the charging voltage of the printing sheet of said next slip sheet of the sheet material,
A sixth step of absorbing impact of the next printing sheet material fed on the previous printing sheet material;
A method for accumulating printing sheet materials, comprising:

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