JP4355685B2 - Cleaning device - Google Patents

Description

  The present invention relates to a cleaning device capable of cleaning both surfaces of a sheet by sandwiching and conveying a sheet material between blankets.

  For example, supply of recording paper, printing sheet, or other sheet material (resin sheet, sheet, etc.) to an offset printing machine to improve image quality as a pre-printing process, thus removing dust adhering to the sheet material A device is used. The cleaning device removes the dust adhering to the sheet surface by air blowing, removes the dust by adhering it through a pair of adhesive rollers, and further passes through a pair of blanket cylinders and adheres to both surfaces of the sheet. There are devices for removing dust.

  A rubber blanket is wound around the blanket cylinder, and an adhesive roller is pressed against the blanket so that dust adhering to the blanket adheres and is collected by a collecting roller that presses against the adhesive roller. When a large amount of dust is collected on the collecting roller, it is extracted in the axial direction and replaced.

When the blanket is removed from the cylinder and replaced, the working space for the blanket cylinder above the sheet conveying surface can be easily secured. However, it is difficult to secure a working space for the blanket cylinder below the sheet conveying surface. Specifically, since a register device and a transport device are provided in the vicinity of the blanket cylinder, it is difficult to remove and replace the blanket from the cylinder.
In particular, when a sheet jam occurs in the cleaning device, maintenance may not be performed unless the blanket cylinder connected to the drive transmission mechanism is disassembled.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cleaning device that facilitates securing a maintenance space and improves workability.

In order to achieve the above object, the present invention comprises the following arrangement.
A pair of blanket cylinders that cleans the sheet surface when the sheet material is sandwiched and conveyed, a registration device that is provided in the vicinity of the upstream side of the nip portion of the pair of blanket cylinders, positions the sheet material, and sends the sheet material to the nip portion, and the sheet material A conveying device that conveys the image to the registration device is provided so that the posture can be changed from the horizontal posture, and the registration device uses a space portion formed by changing the posture of the conveyance device from the horizontal posture, from the nip portion of the blanket cylinder. It is provided so as to be movable in a separating direction.
In addition, the conveying device flips the downstream side in the sheet conveying direction upward around the rotation axis on the upstream side in the sheet conveying direction to change the posture from the horizontal posture to the standing posture, and the register device can move to the lower space of the standing conveying device. It is provided in.
Also, the conveying device lifts the upstream end in the sheet conveying direction upward and moves the downstream side in the sheet conveying direction to the upstream side to change the posture from the horizontal posture to the inverted posture. It is provided to be movable.

  By using the cleaning device described above, the registration device moves around the blanket cylinder by moving the conveyance device in a direction away from the nip portion of the blanket cylinder using a space formed by changing the posture from the horizontal posture. A sufficient working space can be formed. Therefore, a sufficient working space can be secured for exchanging the blanket wound around the blanket cylinder below the sheet conveying surface, in particular, among the pair of blanket cylinders. Further, since it is not necessary to disassemble the cleaning device for maintenance and it is not necessary to provide a special take-out mechanism, maintenance work can be performed efficiently.

Hereinafter, the best embodiment of the cleaning device according to the present invention will be described in detail with reference to the accompanying drawings. As an example of the cleaning device, a cleaning device used as a pre-process for printing processing on a sheet material (for example, a resin sheet) will be described.
1 to 3, the cleaning device is provided with a transport device 1, a register device 2, a first cleaning unit 3, and a second cleaning unit 4 from the upstream side to the downstream side in the transport direction of the sheet material. ing.

  In FIG. 2A, for example, a belt conveyor is used as the conveying device 1, and a rotating shaft 5a rotatably supported on the upstream side in the sheet conveying direction of the horizontal frame 5 provided on both sides in the width direction is rotated downstream in the sheet conveying direction. A plurality of endless belts 6 are installed between the rotatable rollers 5b that are pivotally supported. A pressing roller 7 is provided so as to face the endless belt 6, and the pressing roller 7 is provided so as to abut on the belt 6 by its own weight and to be driven to rotate. The conveying device 1 can change its posture from a horizontal posture by flipping the downstream side in the sheet conveying direction upward around the rotation shaft 5a on the upstream side in the sheet conveying direction.

  Specifically, in FIG. 3A, the horizontal frame 5 provided on both sides in the width direction is provided with a handle 5c so that the handle 5c can be gripped and rotated around the rotation shaft 5a. The horizontal frame 5 is connected to one end of the lever 8 in which the slit 8a is formed. The lever 8 is provided with a slit 8a in the longitudinal direction. The registration device 2 is provided with a fixing pin 9 that can be inserted into the slit 8a. In FIG. 3B, when the conveyance device 1 holds the handle 5c and lifts the downstream side in the sheet conveyance direction upward, the conveyance device 1 rotates in the clockwise direction around the rotation shaft 5a at the upstream end in the sheet conveyance direction. At this time, the lever 8 connected to the horizontal frame 4 also gradually rotates in the same direction, and rotates until the lever 8 stands up (upright). The conveying device 1 stops in an inclined state in which the moment of the connecting portion is suspended at the position where the lever 8 is upright. In FIG. 3C, a registration device 2 (to be described later) is moved to a lower space of the conveyance device 1 with the lever 8 standing upright, and the conveyance device 1 stops in an inclined posture by engaging the fixing pin 9 with the slit 8a. It is like that.

  In FIG. 1, a registration device 2 is provided in the vicinity of the upstream side of the first cleaning unit 3 and positions a sheet material. In FIG. 4, the registration device 2 is positioned by sandwiching the sheet material from both sides with the guide plate 20 (see FIG. 5) in a state where the leading edge of the sheet material is abutted against the claw 10. The feed roller 11 feeds the first cleaning unit 3. The registration device 2 is fixed to the device main body by a fixing screw 12. By loosening the fixing screw 12, the roller 2a rolls along the rail groove of the guide rail 13 having a U-shaped cross section fixed to the both-side device frame. As a result, the registration device 2 can be slid along the guide rail 13 to the lower space of the conveying device 1 that has been pushed up at the downstream end in the sheet conveying direction. In FIG. 3A, the register device 2 is provided with a fixing pin 9. In FIG. 3C, the register device 2 is slid to be inserted into the slit 8a of the lever 8 that is erected and locked. It can be done. FIG. 2B shows a state in which the register device 2 is moved to the lower space of the transport device 1.

  In FIG. 1, the first cleaning unit 3 is provided with a pair of blanket cylinders 14a and 14b for cleaning both surfaces of a sheet when a sheet material (resin sheet or the like) is sandwiched and conveyed. 3A and 3B, rubber blankets 16a and 16b are wound around blanket cylinders 14a and 14b around metal cylinders 15a and 15b. In FIG. 1, adhesive rollers 17a and 17b are in pressure contact with the blankets 16a and 16b, respectively, so that dust adhering to the blankets 16a and 16b adheres and is collected by the cleaning rollers 18a and 18b. The cleaning rollers 18a and 18b can be exchanged by being pulled out in the axial direction toward the front side of the apparatus. The second cleaning unit 4 provided on the downstream side of the first cleaning unit 3 is provided with a plurality of adhesive roller pairs 19a and 19b so that both sides of the sheet material are cleaned and sent to the next process. It has become.

  In FIG. 5, the sheet material S is conveyed to the registering device 2 while being placed on the endless belt 6 of the conveying device 1. Then, the sheet material S is sandwiched by the guide plates 20 from both sides when the leading end abuts against the claw 10 and is positioned, and then the claw 10 is retracted and the feed roller 11 is driven, whereby the blanket cylinder 14a, 14b is sent to the nip portion for cleaning.

  3D to 3F, when replacing the blankets 16a and 16b wound around the blanket cylinders 14a and 14b, the operation of the cleaning device is temporarily stopped (see FIG. 3D). Then, the handle 5c of the horizontal lever 5 is gripped and the downstream side in the sheet conveying direction of the conveying device 1 is lifted and rotated clockwise about the rotating shaft 5a, and the lever 8 stops at an upright position (see FIG. 3E). ). Next, the fixing screw 12 (see FIG. 4) of the registration device 2 is loosened and moved to the lower space of the transport device 1 along the guide rail 13. Then, the conveying device 1 and the register device 2 are fixed by inserting and locking the fixing pin 9 into the slit 8a of the lever 8 (see FIGS. 3F and 3C). Thus, maintenance work such as replacement of the blankets 16a and 16b wound around the blanket cylinders 14a and 14b can be performed using the space formed by changing the posture of the transport device 1.

Next, another example of the conveying apparatus will be described with reference to FIGS.
The posture change of the conveying device 1 is not limited to the case where the downstream side in the sheet conveying direction is erected, and the posture may be changed by being inverted. Specifically, in FIGS. 8A and 8B, the conveying apparatus 1 changes the posture from the horizontal posture to the inverted posture by lifting the upstream side in the sheet conveying direction upward and moving the downstream side in the sheet conveying direction to the upstream side. Yes. Since the registration device 2 is assembled integrally with the conveyance device 1, the registration device 2 moves to the space on the near side of the inverted conveyance device 1.

  In FIG. 6A, the conveying device 1 is not limited to a belt conveyor, and when the endless belt 6 is used to convey the sheet material S to the registering device 2 and is fed from the registering device 2 to the blanket cylinders 14a and 14b, the sheet The rear end of the material S is pushed by the feed claw 21. In FIG. 6B, the feeding claw 21 is shown in a broken line so as to be in a horizontal position when the sheet material S is fed into the blanket cylinders 14a and 14b and not to interfere with the next sheet material S when returning to the original position. In this way, the claw position is moved away from the conveying surface.

  7A and 7B, the conveying device 1 is configured such that a bearing 23 provided rotatably on the downstream side in the sheet conveying direction rolls between guide rails 22 provided on both sides of the apparatus. The conveying device 1 is connected to the tip of the first slide arm 24a on the upstream side in the sheet conveying direction. The first slide arm 24a is provided coaxially with the second and third slide arms 24b and 24c. The third slide arm 24c is fixed to the apparatus main body in the vertical direction. In addition, a movable rod of a gas spring (damper) 25 is connected to the back side of the transport device 1. The gas spring 25 main body is fixed to the apparatus main body.

  8A and 8B, when replacing the blanket wound around the blanket cylinders 14a and 14b, the rod 26 on the upstream side in the sheet conveying direction of the conveying apparatus 1 is grasped and lifted while the cleaning device is temporarily stopped. As a result, the movable rods of the first and second slide arms 24a and 24b and the gas spring 25 are gradually extended, and the bearing 23 on the downstream side in the sheet conveying direction of the conveying device 1 rolls on the guide rail 22 while upstream of the sheet conveying direction. Move to the side. Since the registration device 2 is provided integrally with the conveyance device 1 on the downstream side in the sheet conveyance direction, the registration device 2 also moves upstream in the sheet conveyance direction. And if the bearing 23 moves to the upstream end of the guide rail 22, the conveying apparatus 1 will be hold | maintained in the inverted attitude | position. The conveying device 1 tries to return to its original state by its own weight, but the inverted posture is held by the holding pressure of the gas spring 25. Thus, maintenance work such as replacement of the blanket wound around the blanket cylinders 14a and 14b can be performed using the space formed by changing the posture of the transport device 1.

  The sheet material S is not limited to a resin sheet, and may be a film material, recording paper, or the like. The cleaning device has been described for double-sided cleaning, but can also be applied to single-sided cleaning.

It is explanatory drawing which shows schematic structure of a cleaning apparatus. It is a perspective explanatory view in the case of performing maintenance work. It is state explanatory drawing which shows the movement operation | movement of a conveying apparatus and a registration apparatus. It is a perspective explanatory view of a register device. It is operation | movement explanatory drawing of a conveying apparatus and a registration apparatus. It is a perspective view of the conveying apparatus which concerns on another example. It is explanatory drawing and perspective explanatory drawing of the cleaning apparatus which concerns on another example. It is explanatory drawing and perspective explanatory drawing which show the movement operation | movement of the conveying apparatus and registration apparatus of the cleaning apparatus which concern on another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Conveyance apparatus 2 Registration apparatus 3 1st cleaning part 4 2nd cleaning part 5 Horizontal frame 5a Rotating shaft 5b Rotating roller 5c Handle 6 Endless belt 7 Holding roller 8 Lever 8a Slit 9 Fixing pin 10 Claw 11 Feeding roller 12 Fixing screw 13 Guide rails 14a, 14b Blanket cylinders 15a, 15b Cylinders 16a, 16b Blankets 17a, 17b Adhesive rollers 18a, 18b Cleaning rollers 19a, 19b Adhesive roller pair 20 Guide plate 21 Feed claws 22 Guide rail 23 Bearing 24a First slide arm 24b Second slide arm 24c Third slide arm 25 Gas spring 26 Rod

Claims (3)

A pair of blanket cylinders for cleaning the sheet surface when the sheet material is sandwiched and conveyed;
A registration device that is provided in the vicinity of the upstream side of the nip portion of the pair of blanket cylinders and that positions the sheet material and feeds it to the nip portion;
A conveying device that conveys the sheet material to the registration device is provided so that the posture can be changed from the horizontal posture,
A cleaning device, wherein the register device is provided so as to be movable in a direction away from the nip portion of the blanket cylinder using a space formed by changing the posture of the transport device from a horizontal posture.   The conveying device flips the downstream side in the sheet conveying direction upward around the rotation axis on the upstream side in the sheet conveying direction to change the posture from the horizontal posture to the standing posture, and the register device is provided so as to be movable to the lower space of the standing conveying device. The cleaning device according to claim 1, wherein   The conveying device lifts the upstream side in the sheet conveying direction upward and moves the downstream side in the sheet conveying direction to the upstream side to change the posture from the horizontal posture to the inverted posture, and the register device can move to the space on the near side of the inverted conveying device The cleaning device according to claim 1, further comprising:

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