JP3986289B2 - Guide roller cleaning method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a guide roller cleaning that controls the behavior of a guide roller when a printing web impregnated with a cleaning liquid is run in order to remove foreign matter adhering to the guide roller that guides the conveyance of the printing web in an offset rotary press. It relates to a method and an apparatus.
[0002]
[Prior art]
A large number of guide rollers are required to guide the printing web with a newspaper printer or the like. Foreign matters such as ink residue and paper dust are likely to adhere to the surfaces of these guide rollers, and the foreign matters attached to the surfaces of the guide rollers may be transferred again to the printing web and cause stains on the printing web. Therefore, it is necessary to clean the guide roller so as not to soil the printing web.
[0003]
The cleaning of the guide roller is performed by running a printing web impregnated with a cleaning liquid and wiping the surface of the guide roller by the printing web. However, the guide roller is designed to rotate freely in order to prevent damage to the print web due to friction, and has a structure that rotates with the travel of the print web. Therefore, when the printing web impregnated with the cleaning liquid is run, a mechanism for forcibly driving the guide roller is provided, and the surface of the guide roller is wiped by the printing web by changing the speed between the printing web and the printing web. ing. Thus, the guide roller and the printing web slide, and the dirt on the guide roller is transferred to the printing web impregnated with the cleaning liquid for cleaning.
[0004]
A gear mechanism is used for forced driving as described above. The guide roller is provided with a dependent gear for rotating the guide roller, and the guide roller is forcibly driven by meshing with a driving gear attached to a driving means such as a motor. By the way, if there is a speed change between the printing web and the guide roller during printing, the printing web may be damaged. Therefore, the guide roller needs to retract the drive gear that forcibly drives the guide roller so that the guide roller is rotated along with the running of the printing web during printing. For this reason, the drive gear is provided with an attachment / detachment drive means for attaching to and detaching from the guide roller. During printing, the drive gear is retracted from the gear attached to the guide roller, and the gears are engaged with each other when cleaning the guide roller. It is carried out.
[0005]
[Problems to be solved by the invention]
According to the above configuration, the conventional cleaning of the guide roller requires two types of driving means in combination with a driving means for forcibly driving the guide roller and a driving means for attaching and detaching the gear to be forcibly driven. I was trying. However, in an offset rotary press, there are a large number of guide rollers for guiding the conveyance direction of the printing web, so that it is necessary to install driving means for each of the plurality of guide rollers, and to control it. The mechanism and system had to be complicated.
In addition, since two driving means are required for one guide roller, the weight and space of the cleaning device itself are increased, and the offset rotary press to which the guide roller cleaning device is attached is a heavy burden.
[0006]
The present invention focuses on the above-described problems, and an object thereof is to provide a simple and lightweight guide roller cleaning method and apparatus in which a mechanism for causing the guide roller to move differently with respect to the running of the printing web is simplified.
[0007]
[Means for Solving the Problems]
Guide rollers cleaning method according to the present invention, there is provided a guide roller cleaning method of cleaning by contacting the print web impregnated with the guide rollers and the cleaning liquid on a path through the web, dependent gear and parts mounted on the guide roller The disengagement gear with the rotation center fixed and rotationally operated by one drive means to switch between the meshing state and the non-meshing state of the subordinate gear and the toothless gear , in the non-meshing state and free rotatable state guide rollers, by changing the rotational speed or the rotational direction of the guide rollers in the engaged state, by changing the circumferential speed or the rotational direction of the guide rollers for printing web, the cleaning of guide rollers It is characterized by doing.
[0008]
Further, the guide roller cleaning device according to the present invention is a guide roller cleaning device for cleaning the guide roller on the web threading path, and the drive is performed between the guide roller and one driving means capable of rotationally driving the guide roller. An intermittent rotation transmission mechanism is provided for forcibly rotating or freely rotating the guide roller by the operation of the means, and the rotation speed or direction of the guide roller with respect to the printing web is changed to enable the cleaning of the guide roller. is there. In this case, the intermittent rotation transmission mechanism includes a subordinate gear mounted on a guide roller, and a toothless gear arranged with a rotation center fixed so as to be able to mesh with the subordinate gear when the guide roller is cleaned. The drive means can drive the guide roller by rotating the toothless gear. Further, the driving means may be constituted by a cylinder mechanism that reciprocally rotates around the segmental gear shaft axis, or may be constructed by a rotary actuator arranged on the same axis as the segmental gear.
[0009]
[Action]
With the above configuration, by removing a part of the drive gear installed in the drive means for rotating the guide roller, in the meshing portion of the subordinate gear mounted on the guide roller and the drive gear that moves the gear The following happens. When a toothless gear from which a part of the tooth is removed is attached to the shaft of the drive means, and a subordinate gear that meshes with the toothless gear is attached to the guide roller, the part of the toothless gear where the tooth is missing is the meshing portion. When reaching, the teeth of the gears do not mesh. Therefore, the slave gear attached to the guide roller cannot be forced to be driven by the drive gear. Therefore, the guide roller is in a state where it can freely rotate, and can be rotated with the traveling of the printing web. By performing printing in this case, the guide roller conveys the printing web without receiving interference from the driving means.
[0010]
In addition, when the drive gear is rotated by the drive means and the toothless gear and the subordinate gear mesh with each other, the drive force can be transmitted to the guide roller. It becomes possible. Therefore, in the section where the partial gear and the subordinate gear mesh, the printing web impregnated with the cleaning liquid is conveyed and the guide roller is cleaned.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Specific embodiments of the guide roller cleaning method and apparatus according to the present invention will be described in detail with reference to the drawings. FIG. 2 is a schematic configuration diagram of an offset rotary press 10 in which the guide roller cleaning device according to the present embodiment is used.
An offset rotary press 10 for newspaper printing provided with a guide roller cleaning device 32 according to the present embodiment overlaps a plurality of printing presses 12 and a printing web 14 that has passed through these printing presses 12, and folds the cuts thereof. Part 16.
[0012]
The printing machine 12 performs printing on a printing web 14 fed out from a roll-shaped web 18 via a plurality of guide rollers 20, and includes a plate cylinder 22 for mounting a printing plate, and the plate cylinder 22 concerned. The main components are an ink roller 24 for supplying various inks and a blanket cylinder 25 around which a rubber blanket is wound and receives ink transfer from the plate cylinder 22 and prints the transferred ink onto the printing web 14. Yes.
[0013]
A plurality of guide rollers 20 and a rail frame (not shown) are provided at the subsequent stage of the printing machine 12, and the web web course of the printing web 14 that has passed through the printing machine 12 is set by appropriately selecting these. . A folded portion 16 is provided at the end side of the selected web through course, and the print web 14 is introduced into the folded portion 16.
[0014]
The folding section 16 includes a guide roller 20A that superimposes the printing webs 14, a folding cylinder 26 that is disposed at a subsequent stage of the guide roller 20A and that folds the superimposed printing webs 14, and the folding cylinder. 26, and has a cutter unit 28 that cuts the folded print web 14 into a predetermined size. By passing the print web 14 through the folding unit 16, the print web 14 is overlapped. Matching, folding, and cutting can be performed continuously. The print web 14 after passing through the printer 12 is guided by a plurality of guide rollers 20.
[0015]
A guide roller cleaning device 32 for cleaning the guide roller 20 is attached. FIG. 1 shows a plan view and a front view of the guide roller cleaning device according to the first embodiment of the present invention.
The guide roller 20 is formed in a cylindrical shape in which the cylinder length direction is slightly longer than the width of the printing web 14 in order to guide the conveyance of the printing web, and the guide roller 20 and the shaft core are the same on both sides. A shaft 34 is attached. As shown in FIG. 1B, the slave gears 36A and 36B are attached to one end of the guide roller 20. The subordinate gears 36A and 36B have a semicircular shape obtained by dividing a spur gear having concavo-convex teeth on the outer periphery into half. The supporting shaft 34 is passed through these centers and attached with fastening bolts 38, so that the subordinate gears 36A and 36B and the guide roller 20 perform the same rotational movement.
[0016]
On the upper part of the subordinate gears 36A and 36B, a partial gear 40 that meshes with them is provided. The partial gear 40 is formed in a sector shape, and has teeth that mesh with the subordinate gears 36A and 36B in the sector-shaped arc portion. Therefore, as shown in FIG. 1 (2), when the fan-shaped tooth of the missing gear 40 is not in the meshing portion with the dependent gear 36, the dependent gear 36 directly connected to the guide roller 20 is a missing gear. Free rotation is possible without receiving 40 interferences.
[0017]
By the way, as shown in FIG. 1B, an air cylinder 44 is pin-coupled to the toothless gear 40 as a driving means. The air cylinder 44 and the bracket 42 are pin-coupled, and the bracket 42 is fixed to the printing machine 12 (not shown). That is, the air cylinder 44 is pin-coupled to the toothless gear 40 and the bracket 42 at both ends. The operation of the air cylinder 44 is controlled by the control unit 48. When the air cylinder 44 is actuated, as shown in FIG. 1 (3), the coupling portion between the air cylinder 44 and the toothless gear 40 moves to the left while drawing an arc. At this time, since the air cylinder 44 and the bracket 48 are pin-coupled, the right end of the air cylinder 44 remains fixed. Accordingly, the air cylinder 44 swings downward to rotate the toothless gear 40 clockwise.
[0018]
Further, since the toothless gear 40 rotates clockwise, it meshes with the dependent gear 36B and rotates the dependent gears 36A, 36B counterclockwise. That is, the guide roller 20 attached to the dependent gears 36A and 36B is forced to perform the same rotational motion.
[0019]
Thereafter, the air cylinder 44 is controlled so as to reversely rotate the partial gear 40 while the partial gear 40 and the subordinate gears 36A and 36B are kept engaged, as shown in FIG. Returning to the original position, after the guide roller 20 is reversely rotated, the intermittent gear 40 and the subordinate gears 36A and 36B are disengaged, and the subordinate gears 36A and 36B and the guide roller 20 are freely rotatable again. It becomes.
[0020]
Here, the operation according to the first embodiment will be described. When printing is performed by the offset rotary press 2, the guide roller cleaning device 32 is in a state in which the meshing between the partial gear 40 and the subordinate gears 36A and 36B is released as shown in FIG. is there. Therefore, the guide roller 20 is freely rotatable and rotates with the travel of the printing web 14. At this time, the subordinate gears 36 </ b> A and 36 </ b> B also make a rotational motion as the guide roller 20 rotates.
[0021]
Next, the operation proceeds to the operation of cleaning the guide roller 20. The printing web impregnated with the cleaning liquid is caused to travel, and at the same time, the air cylinder 44 is operated by the controller 48 to rotate the toothless gear 40 clockwise. As a result, the subordinate gear 36B and the partial gear 40 mesh with each other, and the subordinate gears 36A and 36B are forcibly rotated counterclockwise by the partial gear 40.
[0022]
The toothless gear 40 rotates in the clockwise direction by the air cylinder 44 and then rotates in the reverse direction without releasing the meshing with the dependent gear 36B. Therefore, the subordinate gears 36A and 36B initially rotate counterclockwise, but in response to the operation of the toothless gear 40, the subordinate gears 36A and 36B rotate counterclockwise and rotate clockwise.
[0023]
The guide roller 20 receives a series of operations of the above-described subordinate gears 36A and 36B, and rotates as a result of the subordinate gears 36A and 36B meshing with the toothless gear 40. Will come in contact at a different speed or rotation. At this time, the surface of the guide roller 20 is wiped and cleaned by rubbing against the printing web 14 impregnated with the cleaning liquid.
[0024]
The air cylinder 44 reciprocates and meshes the toothless gear 40 and the subordinate gear 36B, then returns to the original position as shown in FIG. 1 (2), and the meshing of the two gears is released. . As a result, the slave gears 36A and 36B can freely rotate again, and the guide roller 20 rotates with the traveling of the printing web 14.
[0025]
By repeatedly performing the above-described operation, the meshing position of the guide roller 20 that has been disengaged and then rotated is changed when the guide roller 20 meshes with the partial gear 40 next time. Therefore, the surface of the guide roller 20 can be evenly cleaned while the forced driving by the air cylinder 44 is repeated several times.
[0026]
With the above configuration, the gear can be attached and detached without using a special mechanism for attaching and detaching the meshing of the gears. This is realized simply by using a partial gear mechanism in which a part of the gear teeth is omitted. Further, by combining the driving means for attaching and detaching the gears and the driving means for rotating the gears, it is possible to cope with the above two operations with one driving means. As a result, the guide roller cleaning device 32 can be reduced in size and simplified.
[0027]
In the above embodiment, since the air cylinder 44 is used as the gear driving means, the guide roller 20 can be arbitrarily driven to rotate by simply setting the reciprocating stroke without performing complicated control. Therefore, an advantage that the control configuration is simplified can be obtained.
[0028]
In the above-described guide roller cleaning device 32, the air cylinder 44 is used as a gear driving means, but a rotary actuator 50 can also be used. Below, the guide roller washing | cleaning apparatus 32 using the rotary actuator 50 as 2nd embodiment is demonstrated with reference to FIG. 3 and FIG.
[0029]
As shown in FIGS. 3 (1) and 3 (2), the toothless gear 40 is engaged with and attached to the dependent gears 36 A and 36 B attached to the guide roller 20. The spur gear 40 has teeth that mesh with the subordinate gear 36 on the outer circumference of the spur gear, but a part of the spur gear 40 is omitted, and is formed so as to provide a region that is completely disengaged from the subordinate gear 36. is doing. That is, as shown in FIG. 3 (1), a part of the teeth of the toothless gear 40 is removed in a fan shape, and the meshing with the dependent gear 36 is released in this part.
[0030]
The toothless gear 40 is provided with a rotary actuator 50 as driving means for transmitting a driving force to rotate the guide roller 20. The rotary actuator 50 is attached to the rotating gear 46 on the rotary shaft 46 of the rotary actuator 50 by using a rotary actuator that can rotate in the forward and reverse directions. The rotary actuator 50 is fixed to the bracket 42.
The rotary actuator 50 controls forward or reverse rotation by the control unit 68. Therefore, the rotation of the rotation of the rotary actuator 50 causes the partial gear 40 to swing forward and backward.
[0031]
Here, the operation of the guide roller cleaning device 32 in the second embodiment will be described. As shown in FIG. 4A, during printing of the offset rotary press 10, the missing gear 40 is stationary with the missing tooth portion positioned in the meshing region with the dependent gear 36. Since the dependent gear 36 is not meshed with the partial gear 40, it can rotate freely. At this time, the guide roller 20 is rotated along with the traveling of the printing web 14 by traveling the printing web 14 that has performed the printing action. For this reason, it is possible to prevent the print web 14 from being damaged due to the speed difference between the guide roller 20 and the print web 14.
[0032]
Next, the operation when the printing web 14 impregnated with the cleaning liquid is run and the guide roller 20 is cleaned will be described. The rotary actuator 50 that has received a command for cleaning the guide roller 20 by the control unit 68 is operated, and the rotary shaft 46 rotates. Accordingly, the toothless gear 40 attached to the rotary actuator 50 also rotates in the same manner, and the toothless gear 40 and the subordinate gear 36 mesh with each other, thereby rotating the subordinate gear 36.
[0033]
At this time, the control unit 68 rotates the missing gear 40 to the maximum limit of the rotary actuator 50 as shown in FIG. The partial gear 40 and the dependent gear 36 mesh with each other, and the guide roller 20 is forcibly rotated. The rotary actuator 50 rotates in the reverse direction after rotating to the limit angle, and after the state shown in FIG. 4 (3), the missing tooth portion reaches the meshing region as shown in FIG. 4 (1). When the state returns to the state of FIG. 4A in this way, the meshing of the toothless gear 40 and the subordinate gear 36 is disengaged, and the guide roller 20 attached to the subordinate gear 36 can freely rotate. It will be accompanied with the traveling. Thereafter, the rotary actuator 50 is actuated again to start the cleaning operation, whereby the slave gear 36 that has been rotated together with the guide roller 20 meshes with the toothless gear 40 at a position different from the previous time, and the above operation is performed. Is repeated. In this way, the guide roller can be washed over the entire circumference without any leakage by continuously changing the position and performing the washing.
[0034]
Thus, the cleaning of the guide roller 20 is performed by controlling the control unit 68 to mesh the two gears. As a result, the guide roller 20 also inevitably performs forward and reverse rotational movements, and has a speed difference with respect to the printing web 14 impregnated with the cleaning liquid, so that wiping cleaning is performed.
[0035]
If there is a speed difference between the guide roller 20 and the printing web 14 during printing, the printing web 14 may be damaged. Therefore, the guide roller 20 must be able to rotate with the travel of the printing web 14 during printing. According to the guide roller cleaning device 32 according to the present embodiment, one of the drive gears meshed with the slave gear 36 attached to the guide roller 20 in order to cause the print web 14 traveling on the guide roller 20 to move differently. The part is omitted to form a toothless gear 40. Thus, the meshing of the two gears can be released by bringing the missing tooth portion to the meshing portion.
[0036]
Accordingly, there is no need to provide a drive gear attaching / detaching mechanism, and the drive gear can be simply driven to rotate while the rotational position is fixed, and no new drive means is required to disengage. That is, the driving means for rotating the drive gear can perform two kinds of actions, rotation and attachment / detachment. For this reason, it is possible to reduce the size and weight of the guide roller cleaning device 32 and to simplify the mechanism.
In particular, in the second embodiment, by using the rotary actuator 50 arranged concentrically with the drive gear as the drive means, it is possible to reduce the installation space of the drive means of the partial gear 40, and the cleaning device Can be miniaturized.
[0037]
【The invention's effect】
With the above configuration, the present invention performs the forced rotation and free rotation of the guide roller by utilizing the section where the gear is not meshed by driving the guide roller by using the toothless gear from which a part of the tooth is removed. Can be selected and operated. Therefore, when performing printing on an offset rotary press, the gear mounted on the guide roller and the drive gear are not meshed with each other without providing a special mechanism for detaching the drive gear from the dependent gear mounted on the guide roller. Can be changed. That is, it is not necessary to cause the drive gear to be retracted in order to release the engagement, and it is not necessary to engage the retracted drive gear again when the guide roller is cleaned.
[0038]
As described above, the use of the toothless gear in which a part of the teeth is omitted in the driving gear eliminates the need for a function for attaching and detaching the driving gear to the subordinate gear, and is necessary for attaching and detaching the driving gear and attaching / detaching driving means Space can be omitted, and the guide roller cleaning device can be reduced in size and weight. Furthermore, the mechanism of the guide roller cleaning device can be simplified by omitting the attaching / detaching driving means.
[Brief description of the drawings]
FIG. 1 is a plan view and a front view of a guide roller cleaning device according to a first embodiment.
FIG. 2 is a schematic configuration diagram of an offset rotary press in which the guide roller cleaning device according to the present embodiment is used.
FIG. 3 is a front view and a side view of a guide roller cleaning device according to a second embodiment.
FIG. 4 is an explanatory diagram of an operation according to the second embodiment.
[Explanation of symbols]
10 ......... Offset rotary press, 12 ......... Printer, 14 ......... Print web,
16 ......... Folding part, 18 ......... Wound paper, 20 ......... Guide roller,
22 ... …… Print cylinder, 24 ... Ink roller, 26 ... Folding cylinder,
28 ......... Cutter part, 30 ......... Bearing, 32 ......... Guide roller cleaning device,
34 ......... support shaft, 36 ......... subordinate gear, 38 ......... fastening bolt,
40 ......... toothless gear, 42 ......... bracket, 44 ......... air cylinder,
46... Rotating shaft 48... Control unit 50.

Claims (4)

A guide roller cleaning method of cleaning by contacting the printed impregnated guide roller and the cleaning liquid on a path through the web web guide rollers in the dependent gear partially meshing mounted, by fixing the rotation center The dislocated gears are rotated by one driving means to switch between the meshing state and the non-meshing state of the subordinate gear and the missing gear, and in the non-meshing state, the guide roller can be freely rotated. , by changing the rotational speed or the rotational direction of the guide rollers in the engaged state, by changing the circumferential speed or the rotational direction of the guide rollers for printing a web guide roller cleaning method and performing the cleaning of guide rollers . A guide roller cleaning device for cleaning a guide roller on a web threading path, a subordinate gear mounted on the guide roller between the guide roller and one driving means capable of rotationally driving the guide roller, and cleaning the guide roller An intermittent rotation transmission mechanism is provided which is composed of a partial gear with a rotational center fixed to be able to mesh with the subordinate gear, and the drive means rotates the partial gear to rotate. A guide roller cleaning device, wherein the guide roller is driven to rotate , and the guide roller is cleaned by changing a circumferential speed or a rotation direction of the guide roller with respect to the printing web. 3. The guide roller cleaning device according to claim 2 , wherein the driving means is constituted by a cylinder mechanism that reciprocally rotates the intermittent gear around a rotation axis. The guide roller cleaning device according to claim 2 , wherein the driving means is constituted by a rotary actuator arranged concentrically with the toothless gear.

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