JP2955620B2 - Printing cylinder cleaning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printing cylinder cleaning apparatus, and more particularly to an apparatus for wiping and cleaning the surface of a printing cylinder such as a blanket cylinder, and more particularly to an improvement in a pressing portion for pressing a wiping cloth against the cylinder surface.

[0002]

2. Description of the Related Art Conventionally, as a printing cylinder cleaning apparatus for cleaning a blanket cylinder, an impression cylinder, and the like, a cleaning cloth made of a non-woven fabric impregnated with a cleaning liquid in a pressing portion capable of coming into contact with and separating from the cylinder surface is provided. There is also known an apparatus that wipes and removes surface dirt using a nip pressure of a pressing portion and rotation of a printing cylinder by moving the pressing portion into contact with a cylinder surface during a cleaning operation.

In this type of printing cylinder cleaning apparatus, there is a printing cylinder cleaning apparatus that uses a rubber sheet in order to uniformly press the cleaning cloth along a body length direction of a target cylinder. This is a structure in which a rubber sheet is attached to a base along the body length direction, air is injected into the base to inflate the rubber sheet into a convex convex section, and the elastic force presses the cleaning cloth against the cylinder surface. . The cleaning cloth is sent to the outer surface of the rubber sheet inflated in this way in the direction opposite to the rotation direction of the printing cylinder, and the cylinder surface is wiped with the cleaning cloth. The cleaning cloth is wetted by a cleaning liquid to perform a cleaning action.

[0004]

However, in the above-mentioned conventional structure, as shown in FIG. 6, the pressing portion covers the opening surface of the rubber sheet 1 formed in a semi-cylindrical shape with the base 2 made of a flat plate. The flange 3 at the side edge of the sheet is held by the pad holder 4 and the end opening is held by the holding plate 5.
The sheet is fixed to the base 2 to seal the inside of the sheet. This is fixed to the main stay 6 constituting the frame of the cleaning device by bolting.

[0005] In such a structure, there is a problem that the structure of the pressing portion is complicated, and it is difficult to replace the pressing portion once it is attached to the apparatus frame. Also,
Since it is necessary to attach a mechanism for filling the inside with air or the like, it is more difficult to replace the pressing portion by a simple operation.

[0006] On the other hand, there is also known a structure in which the pressing portion is formed by a sponge-like pressing body made of urethane (Japanese Utility Model Publication No. 4-36924). However, since the pressing force is set by a sponge alone, An appropriate nip pressure cannot be given to a cylinder having a circular surface, and the rectangular cross section has a disadvantage that the nip area is large and an imbalance in pressing force easily occurs, resulting in uneven cleaning.

The present invention pays attention to the above-mentioned conventional problems, and firstly, a printing cylinder cleaning apparatus having a structure that is simple in structure, can reduce a nip area, and can achieve uniform pressing pressure. It is intended to provide. It is another object of the present invention to provide a printing cylinder cleaning device having a structure in which the replacement of the pressing portion can be very easily performed.

[0008]

To achieve the above object, a printing cylinder cleaning apparatus according to the present invention is a cleaning apparatus for wiping and cleaning a printing cylinder with a cleaning cloth. The core part has an arcuate surface facing the printing cylinder side and is integrally projected.
The pad base and the end are fixed to the arc surface core.
And a sponge elastic sheet having a fixed thickness wound around the outer periphery of the arcuate surface core, and the sponge elastic sheet is fixed to a pad base.

Secondly, in a cleaning apparatus for wiping and cleaning a printing cylinder with a cleaning cloth, a pressing portion for pressing the cleaning cloth against the printing cylinder is sponge-formed on an outer surface of an arcuate surface core formed on a pad base. An elastic sheet is wound and mounted, and the pad base is detachable from the apparatus frame side by a fitting structure including a dovetail and a dovetail groove. In this case, the dovetail groove in the fitting structure is formed on the frame side,
What is necessary is just to comprise so that one side edge of a pad base may be fixed with a wedge-shaped screw.

[0010]

According to the above construction, since the pressing portion has a structure in which the sponge elastic sheet is wound around the arc surface core formed on the pad base, the outer surface of the sponge elastic sheet is also formed as an arc surface. You. Therefore, the cleaning cloth can slide smoothly on the arc surface, and can be moved smoothly, and the contact with the printing cylinder is almost in linear contact, the nip area area can be reduced, and the sponge elasticity is always maintained in the contactable area. Since the thickness of the sheet is uniform, a uniform pressing force can be generated. This makes it possible to perform a cleaning operation without cleaning unevenness without using a means for expanding the air pressure or the like.

Further, since the pad base to which the sponge elastic sheet is attached has a fitting structure with ants and dovetails between the pad frame and the apparatus frame, only the pressing portion alone can be attached and detached without removing the cleaning device from the printing press. It will be.
As a result, even when a replacement operation occurs due to deterioration of the sponge elastic sheet or the like, the replacement operation can be easily performed without disassembling the apparatus, and the idle time of the printing apparatus can be reduced. By forming a dovetail groove on one side edge with a wedge screw at the fitting part between the pad base and the frame, the screw is removed, and the pad base is rotated around the dovetail groove on one side edge to reduce space. Exchange becomes possible, and exchange workability is further improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of a printing cylinder cleaning apparatus according to the present invention will be described in detail with reference to the drawings. First, the overall configuration of the printing cylinder cleaning device will be described with reference to FIG. The cleaning apparatus 10 is disposed opposite to a blanket cylinder 12 to be cleaned, and has a frame including a pair of side plates 14 and an H-shaped cross section 16 that is bridged between the side plates. . Stay 1
Reference numeral 6 denotes a main stay 20 which is opposed to the blanket cylinder 12 and to which the pressing portion 18 is attached, and a pair of upper and lower cleaning cloth guide stays 22. A supply roll 26 and a take-up roll 28 for the cleaning cloth 24 are disposed behind the stay 16, and the cleaning cloth 24 is unreeled from the supply roll 26, and from the upper guide stay 22 </ b> U in FIG. The paper is wound by a rear winding roll 28 via a guide stay 22D. The take-up of the cleaning cloth 24 is performed by intermittently driving the take-up roll 28 while applying a brake to the supply roll 26, and a mechanism for that is provided on the side plate 14 (not shown). A cleaning liquid supply nozzle 30 is arranged on the side of the pressing portion 18 (upper part in the drawing) inside the stay 16 so as to appropriately supply and supply the cleaning liquid to the cleaning cloth 24. As a result, the cleaning cloth 24 that is intermittently fed reaches the tip of the pressing portion 18 while being moistened with the cleaning liquid. At this time, the device frame is advanced to bring the pressing portion 18 into contact with the surface of the blanket cylinder 12. It has a cleaning effect.

In such a printing cylinder cleaning apparatus, a pressing portion 18 which is a feature of the present invention is shown in FIGS. As shown, the pressing portion 18 is connected to the stay 16.
The main base 20 is composed of a pad base 32 which can be easily attached to and detached from the main stay 20, and a sponge elastic sheet 34 attached to the pad base 32. The pad base 32 has a pair of ants 36 in which both side edges of the flat plate are cut obliquely, and a ridge 38 having a tip end surface of an arc surface is integrally protruded at the center on the plate surface. I have. The ridges 38 are set so that the arc surface faces the surface of the blanket cylinder 12 when the base 32 is attached to the frame and the cleaning posture is reached, and serves as a winding core of the sponge elastic sheet 34. ing.
Also, caulking pieces 40 are erected on both sides of the protrusions 38 of the pad base 32, and the sponge elastic sheet 34 wound around the protrusions 38 is sandwiched between the protrusions 38. It is fixed by caulking.
And is bent upright when the sponge elastic sheet 34 is mounted, so that the end of the sheet is pinched.

On the other hand, the sponge elastic sheet 34 is formed by foaming a solvent-resistant fluoro rubber as a raw material, and is supplied as a sheet material having a constant thickness. It is wrapped around the outer circumference for mounting. As shown in FIG. 2, the sponge elastic sheet 34 is first inserted at one end thereof into a gap between the ridge 38 of the pad base 32 and the one-side caulking piece 40 (FIG. 2A), and the other end is provided. The part is wound around the arc surface of the ridge 38 and inserted into the other gap (FIG. 2B). Thereafter, the caulking pieces 40 on both sides are lowered toward the protruding ridges 38, thereby being fixed to the pad base 32. A claw 42 is formed on the inner surface of the caulking piece 40 to prevent the sponge elastic sheet 34 from dropping off after caulking, thereby preventing detachment.

As described above, such a pressing portion 18
The main stay 20 is formed with a dovetail groove 44 for fitting into the dovetail 36 formed on the pad base 32. In this embodiment, the dovetail groove 44 is formed on the pad base 32.
Is provided for fitting to the dovetail 36 on one side edge, and the dovetail 36 on the other side edge is pressed by a wedge screw 46. As shown in FIG. 1, the pad base 32 is installed on the main stay 20 so that the ants 36 on one side edge contact the lower guide stay 22D, and in this state, the other side edge (toward the upper guide stay 22U side). The dovetail groove 44 is formed so as to be fitted with the dovetail 36 of the edge portion provided). Ants 3 in contact with lower guide stay 22D
6, a screw 46 is screwed into a screw hole 48 formed in the lower guide stay 22D. The screw 46 has a conical tip 46A whose tip is inclined to the inclined surface of the dovetail 36. , By the screwing action, the conical tip 46
When A faces the main stay 20, the conical tip 4
There is an angle between 6A and the surface of the May stay 20 and the groove 4
4 is set. Therefore, by placing the pad base 32 on the main stay 20 and screwing the wedge screw 46, the pad base 32 is firmly fixed by the wedge action of the screw 46.
A plurality of screw holes 48 may be provided so that the wedge screws 46 can be attached at appropriate intervals along the longitudinal direction of the pad base 32.

In the embodiment configured as described above, the pressing portion 18 formed by winding the sponge elastic sheet 34 around the pad base 32 is attached to the pad base 32 by removing the wedge screw 46.
The guide stay 22 can be easily separated from the top of the main stay 20. Since this operation is performed from the outer surface of the guide stay 22,
Workability is greatly improved. Further, since the pressing portion 18 has a configuration in which the sponge elastic sheet 34 having a constant thickness is wound around the arcuate surface ridge 38 of the pad base 32 as a core, the outer surface of the sponge elastic sheet 34 also has an arc shape, The contact with the blanket cylinder 12 can be substantially in a line contact state, so that the nip width can be reduced to minimize the deviation of the pressing force. Further, since the thickness of the sponge portion is uniform at any position on the arc surface, the pressing force can be made uniform. Further, since the pad base 32 of the pressing portion 18 has a uniform cross-sectional structure, it can be formed by simple die-cutting, and has an advantage that the manufacturing cost of the pressing portion can be reduced.

Next, FIGS. 3 and 4 show a second example. This is an example in which the structure of the pad base is changed. That is, the pad base 32A of this embodiment is a thick flat plate, and the dovetails 36 formed below the side edges are provided by forming the V-shaped grooves 50 on the side surfaces. An arc surface 52 having an outer diameter substantially corresponding to the outer diameter of the blanket cylinder 12 is formed on the surface portion of the base 32A, and an end surface having a height smaller than the thickness of the sponge elastic sheet 34 is formed on a side edge portion thereof. A presser 54 is provided. Then, the caulking piece 40 is provided at the upper end of the end face presser 54, and the sponge elastic sheet 34
Is fixed by caulking the outer surface of the end portion (see FIG. 4).
(3)). In this example, the main stay 20 is bolted to the guide stay 22, and the main stay 20 is made thin while making the main stay 20 thin.
2 to form an H-shaped cross section of the stay 16 to reduce the weight and cost. Other configurations are the same as in the first embodiment.

[0018]

As described above, according to the present invention,
The pressing part that presses the cleaning cloth against the printing cylinder, and the core part with the arc facing the part facing the printing cylinder side are integrally projected.
The pad base and the end are fixed to the arc surface core.
And a fixed thickness sponge elastic sheet that is wound around the outer periphery of the arc surface core and is fixed to the pad base, thereby simplifying the structure and reducing the nip area. And the effect that the pressing force can be made uniform can be obtained.
The sponge elastic sheet is wound around and attached to the outer surface of the arcuate core formed on the pad base, and the pad base is detachable with respect to the apparatus frame side by a fitting structure including dovetails and dovetail grooves. Accordingly, an effect is obtained that the replacement of the pressing portion can be very easily performed.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an attaching / detaching operation of a pressing unit according to a first embodiment.

FIG. 2 is an explanatory view of a state in which the sponge elastic sheet of the embodiment is assembled on a pad base.

FIG. 3 is an explanatory diagram of an attaching / detaching operation of a pressing unit according to a second embodiment.

FIG. 4 is an explanatory view of a state in which the sponge elastic sheet of the embodiment is assembled to a pad base.

FIG. 5 is a side sectional view showing the overall schematic configuration of the cleaning apparatus according to the embodiment.

FIG. 6 is an exploded perspective view of a conventional pressing portion.

[Explanation of symbols]

 Reference Signs List 10 cleaning device 12 blanket cylinder 14 side plate 16 stay 18 pressing part 20 main stay 22 (22U, 22D) guide stay 24 cleaning cloth 26 supply roll 28 winding roll 30 cleaning liquid supply nozzle 32 pad base 34 sponge elastic sheet 36 dovetail 38 ridge (Core) 40 Caulking piece 42 Claw 44 Dovetail groove 46 Wedge screw 46A Conical tip 48 Screw hole

Continuation of the front page (56) References JP-A-6-238881 (JP, A) JP-A-3-62839 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B41F 35 / 00 -35/06

Claims (3)

(57) [Claims] 1. A cleaning apparatus for wiping and cleaning a printing cylinder with a cleaning cloth, wherein a pressing portion for pressing the cleaning cloth against the printing cylinder is integrally formed with a core having an arc-shaped surface facing the printing cylinder. Protruding pad base and end
And wherein the but which is composed of a constant thickness of the sponge elastic sheet mounted wrapped around the outer periphery of the circular arc surface core is fixed to the arcuate surface core was fixed to the sponge elastic sheet to a pad base Printing cylinder cleaning equipment. 2. A cleaning apparatus for wiping and cleaning a printing cylinder with a cleaning cloth, wherein a pressing portion for pressing the cleaning cloth against the printing cylinder is mounted by winding a sponge elastic sheet around an outer surface of an arcuate surface core formed on a pad base. The printing cylinder cleaning device, wherein the pad base is detachable from the device frame side by a fitting structure including a dovetail and a dovetail groove. 3. The printing cylinder cleaning apparatus according to claim 2, wherein the dovetail groove in the fitting structure is formed on the frame side, and one edge of the pad base is fixed by a wedge-shaped screw. Printing cylinder cleaning device.