JPH11105265A - Cleaning device of drum of printing press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a used sheet wound up on a winding shaft, in a small space and with ease. SOLUTION: This device is provided with a cleaning means which cleans a drum of a printing press by bringing a beltlike sheet 59 into contact with the peripheral surface of the drum. A winding shaft 61 for winding up the sheet 59 discharged from the cleaning means is provided. A cutting means 121 which cuts the sheet 59 wound up on the winding shaft 61, in the radial direction over the whole extent in the direction of the width of the sheet, is provided. By cutting the sheet 59, it can be removed in a compact state in comparison with a state wherein it is left wound up on the winding shaft 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum cleaning device for a printing press for cleaning a drum such as a blanket cylinder and an impression cylinder of the printing press.

[0002]

2. Description of the Related Art Conventionally, a drum cleaning device for a printing machine has a cleaning head for cleaning a peripheral surface of a drum such as a blanket cylinder or an impression cylinder of a printing machine as described in Japanese Patent Application Laid-Open No. 7-329288. By pressing the belt-shaped sheet into contact, and moving the sheet in a direction opposite to the rotation direction of the drum, the peripheral surface of the drum is rubbed with the sheet to remove stains such as ink.

[0003] The sheet is mounted on a drum cleaning device in a roll state wound around a roll shaft. The sheet is supplied from the roll portion to a cleaning head, and the cleaned sheet discharged from the cleaning head is wound around a winding shaft. I'm trying to take it. The roll shaft is detachable from the drum cleaning device, whereas the take-up shaft is fixedly attached because it is driven to rotate to take up the sheet.

[0004] When the sheet mounted on the drum cleaning device has been used during the cleaning operation, the roll shaft is reversed manually or by another drive mechanism, and the used sheet wound on the winding shaft is used. Is wound back on the roll shaft, and when the rewinding is completed, the roll shaft is removed from the drum cleaning device, and the roll shaft on which a new sheet is wound is mounted on the drum cleaning device.

[0005]

However, in the conventional drum cleaning device, since the take-up shaft is fixedly mounted, the used sheet wound around the take-up shaft is rolled after the use of the sheet. A step of rewinding to the shaft was required, and this rewinding took a relatively long time, resulting in poor work efficiency.

Further, it is conceivable to remove the entire winding shaft around which the sheet has been wound from the drum cleaning device. However, such a removing method involves removing the sheet around twice the outer circumference of the sheet wound around the winding shaft. Space is required, and it is difficult to apply the drum cleaning device to a large-sized rotary press or the like with a small space.

Further, when the leading end of the sheet is mounted on the take-up shaft, the leading end of the sheet is attached to the take-up shaft with an adhesive tape. As a result, there is a problem that the adhesive remains on the winding shaft and dust and dirt tend to adhere thereto, and the peeled tape becomes waste.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a drum cleaning device for a printing press which can easily remove a used sheet wound around a winding shaft in a small space. With the goal.

[0009]

According to a first aspect of the present invention, there is provided a drum cleaning device for a printing press, wherein the cleaning device contacts a peripheral surface of a drum of the printing press with a belt-shaped sheet to clean the drum, and is discharged from the cleaning device. It has a winding shaft for winding the sheet, and cutting means for cutting the sheet wound on the winding shaft in the radial direction over the entire area in the sheet width direction.

The used sheet wound around the winding shaft by the cutting means is cut in the radial direction over the entire area in the sheet width direction, so that the sheet is made compact compared to the state where the sheet is still wound around the winding shaft. It can be excluded.

According to a second aspect of the present invention, there is provided a drum cleaning device for a printing press according to the first aspect.
The cutting means has a slitter and a guide means for moving the slitter along the axial direction of the winding shaft.

The slitter moves in the axial direction of the winding shaft to cut the sheet in the radial direction over the entire area in the sheet width direction.

According to a third aspect of the present invention, a drum cleaning device for a printing press according to the second aspect is provided.
A groove into which the slitter enters is formed on the peripheral surface of the winding shaft along the axial direction of the winding shaft.

The slitter guides the cutting movement of the slitter by entering the groove formed on the peripheral surface of the winding shaft.

According to a fourth aspect of the present invention, there is provided a drum cleaning device for a printing press according to the third aspect.
The winding shaft is formed in a hollow cylindrical shape, and the groove is penetrated through the inner and outer peripheral surfaces of the winding shaft.

When the leading end of the sheet is mounted on the take-up shaft, the leading end of the sheet is inserted into the groove portion and mounted, so that the leading end of the sheet is locked on the take-up shaft, and an adhesive tape or the like is used to stop the sheet. No means is required.

According to a fifth aspect of the present invention, there is provided a drum cleaning device for a printing press according to the second aspect.
A guide body for guiding the tip of the slitter is provided on the circumferential surface of the winding shaft along the axial direction of the winding shaft.

The slitter is guided by a guide provided on the peripheral surface of the winding shaft. Further, when the leading end of the sheet is mounted on the winding shaft, the leading end of the sheet is locked to the guide body, so that a locking means such as an adhesive tape for stopping the sheet is not required.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the drum cleaning device for a printing press according to the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a first embodiment.

In the figure, reference numeral 11 denotes a cylindrical drum such as a blanket cylinder or an impression cylinder of a printing press. The drum 11 is formed to have an axial width of about 1700 mm, for example, and is rotated in the direction of the arrow in FIG.

Reference numeral 21 denotes a drum cleaning device. The drum cleaning device 21 includes a cassette body 22 and supports both ends of the cassette body 22 to approach the peripheral surface of the drum 11 (hereinafter referred to as forward movement, A moving mechanism 23 is provided for moving the forward direction of the cassette body 22) and moving away from the cassette body 22 (hereinafter referred to as retreat, and the backward direction is referred to as the rear side of the cassette body 22). The drum cleaning device 21 is disposed above the center axis of the drum 11 in response to the case where the drum cleaning device 21 cannot be disposed at a position horizontal to the center axis of the drum 11 due to the structure of the printing press.

The cassette body 22 has a pair of cassette frames 31 formed at both ends of the cassette body 22 so as to be laterally elongated in the width direction of the drum 11. They are integrally connected by upper and lower connection shafts 33 and 34.

A pair of mounting pieces 35 are formed at the front and rear portions of the lower edge of each cassette frame 31, and mounting grooves 36 are formed at the bases of the mounting pieces 35 facing each other. A pair of bearing holes 37 and 38 are provided in the front and rear portions on the upper side of each cassette frame 31.
Each of the rear bearing holes 38 is formed with a detachable groove 38a communicating with the rear upper edge of the cassette frame 31.

The support 32 is formed to be horizontally long in the width direction of the drum 11, and a vertical portion 39 facing the peripheral surface of the drum 11 and a lower portion of the vertical portion 39 are provided on the opposite side to the drum 11. It has a substantially L-shaped cross section having a protruding horizontal portion 40. A plurality of screw holes 41 are provided at both end surfaces of the support 32.
Are formed in each screw hole 41.
Each bolt 42 is screwed through 31 to fix the cassette frame 31 and the support 32.

On the vertical part 39 of the support 32, a convex part 43 is formed on the front surface in the whole area in the width direction, and a plurality of mounting holes 44 are formed penetrating the position of the convex part 43 back and forth. In the upper surface 40, a groove 45 is formed in the entire area in the width direction, and a plurality of mounting holes 46 are formed vertically through the front of the groove 45.

On the front surface of the vertical portion 39 of the support body 32, a head unit as cleaning means that is horizontally long along the vertical portion 39 is provided.
47 is installed. The head unit 47 includes a base 48 attached to the vertical portion 39.
On the rear surface, a concave portion 49 that fits with the convex portion 43 is formed in the entire area in the width direction, and a plurality of screw holes 50 are formed in the concave portion 49 corresponding to the position of each mounting hole 44 of the vertical portion 39, Each screw hole 50
The bolts 51 are screwed through the respective mounting holes 44 of the vertical portion 39, and the base 48 is fixed to the vertical portion 39.

On the front surface of the base 48, a concave portion 53 having a mounting surface 52 inclined forward is formed in the entire area in the width direction. A crimp pad 55 is attached to the base 48 so as to protrude forward. The pressing surface 55a on the front surface of the cleaning head 55 contacts the drum 11 at a central portion of the pressing surface 55a such that the pressing surface 55a contacts the peripheral surface of the drum 11 substantially in parallel via a film 56 and a sheet 59 described later. Is tilted so as to be perpendicular to the radiation b from the central axis of the drum 11.

On the front surface of the cleaning head 55, a flexible film 56 made of a fluorine compound and having excellent properties such as non-adhesion, low friction, abrasion resistance and chemical stability is arranged.
The film 56 is formed to have the same width as the width of the cleaning head 55, the upper edge of which is sandwiched and attached by a pressing member 57 which is bolted to the upper surface of the base 48, and the lower edge of which is formed of the base 48. It is wound and attached to a holding member 58 which is bolted to the lower surface.

Between the pair of cassette frames 31 of the cassette body 22, a roll shaft 60 around which a band-shaped sheet 59 made of a wide non-woven fabric or the like is wound, and a hollow cylindrical take-up for winding the sheet 59. Each of the shafts 61 is rotatably mounted.

Bearings 62 are rotatably mounted on both ends of the roll shaft 60, and each of the bearings 62 is mounted in a bearing hole 38 through a mounting groove 38a of each cassette frame 31.

The take-up shaft 61 has both ends at each cassette frame 31.
Each of the bearing holes 37 is rotatably penetrated and fitted at both ends thereof with a ring 63 for abutting the inside of the cassette frame 31 for axial positioning. At both ends of the winding shaft 61, a plurality of connecting grooves 64 are formed.

The sheet 59 is fed from the roll shaft 60 to the lower side of the connecting shaft 34, between the receiving tray 68 and the cleaning liquid supply means 69 below the support 32, and through the front side of the head unit 47. It is wound up.

A pair of sheet pressing members 65 for pressing the peripheral surface of the rolled sheet 59 wound around the roll shaft 60 are attached to the connecting shaft 33, respectively. The sheet holding member 65 is a mounting ring that is rotatably fitted to the connection shaft 33.
A pressing lever 67 that is curved along the roll shape of the sheet 59 from 66 is protrudingly provided.

Below the support 32, a receiving tray 68 and cleaning liquid supply means 69 for guiding the sheet 59 into the receiving tray 68 to impregnate the cleaning liquid are provided.

The receiving tray 68 is formed horizontally long along the horizontal portion 40 of the support 32 and has a concave portion 70 formed on the upper surface. The receiving portion 68 is provided with mounting members 71 disposed at both ends on the lower surface of the horizontal portion 40.
It is mounted parallel to 40, that is, substantially horizontally.

The cleaning liquid supply means 69 includes an impregnating member 72,
The impregnating member 72 includes an attachment portion 73 attached to the horizontal portion 40 and having a substantially T-shaped cross section, and a pressing portion 74 for guiding the sheet 59 into the pan 68. The impregnation member 72 is formed horizontally long along the horizontal portion 40 of the support 32. Have been. A plurality of screw holes 75 are formed in the mounting portion 73 corresponding to the positions of the mounting holes 44 of the horizontal portion 40.
The bolts 76 are screwed through the mounting holes 46 of the horizontal portion 40, respectively, and the impregnating member 72 is mounted on the horizontal portion 40.

A liquid pool space 77 is formed inside the holding section 74, and a number of small holes (not shown) communicating with the liquid pool space 77 are formed on the lower surface of the holding section 74. A communication hole (not shown) communicating with the liquid pool space 77 is formed. The horizontal hole 40 of the support 32 is
The supply hole (not shown) formed in the
The supply tube 78 is connected to the supply hole. The supply tube 78 is disposed along the groove 45 of the support 32, and has a distal end connected to a coupler 79 attached to the cassette frame 31. The coupler 79 is connected to a cleaning liquid supply unit that supplies a cleaning liquid (not shown).

On the rear surface of the tray 68, the sheet 59 passed under the connecting shaft 34 is moved upward, and then the impregnating member is moved.
A guide member 80 leading to 72 is attached.

Each moving mechanism 23 has a fixed frame 81, and a pair of upper and lower rollers 83 having a substantially V-shaped groove are provided on the inner surface of a vertical fixed plate 82 of the fixed frame 81 at the front and rear portions. A slide plate 84, which is rotatably mounted, and whose upper and lower edges protrude in a substantially V-shaped cross section between the upper and lower rollers 83, is slidably mounted in the front-back direction.

A slide frame 85 is attached to the slide plate 84. The slide frame 85 is a vertical support plate 86 and a cassette horizontally projecting inward from the lower edge of the support plate 86. It is composed of a receiving plate 87.

On the outer surface of the support plate 86, there is provided a mounting base 89 having a mounting hole 88 for mounting the slide plate 84 with bolts (not shown).
A dovetail-shaped connecting groove is provided at the rear edge of the support plate 86.
90 are formed.

The cassette receiving plate 87 is formed to have such a width that it can be fitted between the pair of mounting pieces 35 of the cassette frame 31, and engages with the mounting groove 36 of the mounting piece 35 at the front and rear edges thereof. A collision portion 91 is formed. A groove 92 is formed at the rear edge of the left cassette receiving plate 87 along the front-rear direction.
A substantially L-shaped stopper 93 is rotatably attached to 92 by a bolt 94. The tip of the stopper 93 is directed inward.

An air cylinder 95 as a driving means is attached to the rear edge of the fixed plate 82 of each fixed frame 81 via a substantially L-shaped bracket 96. Rod 97 is connected to the connection groove 90 of each slide frame 85.

The right slide frame 85 is provided with a sheet feeding means 101 for rotating the winding shaft 61 so as to move the sheet 59 in a direction opposite to the rotation direction of the drum 11. The sheet feeding means 101 includes a motor 102 mounted on an upper end of a support plate 86 of a slide frame 85. A bevel gear 104 is fixed to a rotating shaft 103 protruding from the front of the motor 102, and protrudes from the front of the motor 102. A rotating shaft 106 is rotatably supported between the pair of blocks 105, and a bevel gear 107 meshing with the bevel gear 104 is fixed to the rotating shaft 106.

A timing pulley 108 is fixed to the rotating shaft 106 and a support plate 86 of the slide frame 85 is fixed.
A timing pulley 109 is rotatably mounted on the inner surface of the motor, and an endless timing belt 110 is stretched between the timing pulleys 108 and 109.

On the inner surface of the timing pulley 109, the winding shaft 61
A key 111 is provided to engage with the connection groove 64 at the end.

The winding shaft 61 corresponds to the winding shaft 61.
A cutting means 121 is provided for cutting the sheet 59 wound in the radial direction over the entire area in the sheet width direction.

The cutting means 121 has a slitter 123 having a sharp edged tooth portion 122 formed on one side edge thereof, and a guide means 124 for moving the slitter 123 along the axial direction of the winding shaft 61. have.

The guide means 124 has a holder 125 holding a slitter 123, and the holder 125 is configured to move along a guide shaft 126 disposed in parallel along the winding shaft 61. ing. The movement of the slitter 123 is performed, for example, by forming a screw around which the holding member 125 is screwed around the guide shaft 126 and rotating the guide shaft 126 so that the slitter 123 moves together with the holding member 125 screwed to the screw. Alternatively, the holding member 125 may be configured to slide with respect to the guide shaft 126 by another driving mechanism.

On the peripheral surface of the winding shaft 61, a groove 127 is formed along the axial direction of the winding shaft 61 so that the tip of the slitter 123 can enter. The groove 127 is formed to penetrate the inner and outer peripheral surfaces of the winding shaft 61 and is formed over a region wider than the width of the sheet 59.

The guide means 124 lowers the tip of the slitter 123 to a position where it enters the groove 127 when cutting the sheet, and retracts the tip of the slitter 123 from the groove 127 except when cutting the sheet. Move to the position you set.

Next, the operation of the first embodiment will be described.

The sheet 59 wound around the roll shaft 60 and mounted on the cassette body 22 is positioned below the connecting shaft 34, above the guide member 80, between the tray 68 and the impregnating member 72, It is mounted on the winding shaft 61 through the front side. When attaching the leading end of the sheet 59 to the take-up shaft 61, the leading end of the sheet 59 can be locked to the take-up shaft 61 by inserting the leading end of the sheet 59 into the groove 127 and mounting the adhesive tape to stop the sheet 59. No locking means is required.

Then, the cassette body 22 is moved to the moving mechanisms 23 on both sides.
In order to mount the cassette body 22, the stopper 93 of the left slide frame 85 is rotated below the cassette receiving plate 87, and the pair of mounting pieces of the left cassette frame 31 of the cassette body 22 is rotated.
The 35 mounting grooves 36 are engaged with the front and rear engaging projections 91 of the cassette receiving plate 87 of the left slide frame 85 to move the cassette body 22 to the left.

The cassette frame 31 on the right side of the cassette body 22
Faces the left end of the cassette receiving plate 87 of the right slide frame 85, a pair of mounting pieces of the right cassette frame 31
Each of the mounting grooves 36 is engaged with each of the front and rear engaging projections 91 of the right cassette receiving plate 87, and the cassette body 22 is moved rightward.

When the cassette body 22 is moved rightward, the winding shaft
The connecting groove 64 of the key 61 is engaged with the key 111. In this state, the stopper 93 is rotated above the cassette receiving plate 87 so that the tip of the stopper 93 faces the outer surface of the cassette frame 31 on the left side, thereby restricting the cassette body 22 from moving leftward.
The cassette body 22 is positioned while maintaining the engagement state between the connection groove 64 of the winding shaft 61 and the key 111.

The cassette body 22 thus mounted on the moving mechanism 23 is supported above the center axis of the drum 11 so that the tray 68 is substantially horizontal.

In the cleaning standby state, each slide frame 85 is moved rearward by each air cylinder 95, and the cassette body 22 is also located at the rear standby position, and the head unit 47 of the cassette body 22 It is separated from the peripheral surface.

To clean the drum 11, the cleaning liquid is supplied from the cleaning liquid supply section to the liquid storage space 77 of the impregnating member 72 through the coupler 79 and the supply tube 78, and the cleaning liquid is supplied to the liquid storage space.
The cleaning liquid is spouted from a number of small holes on the lower surface of the presser part 74 communicating with 77, so that the cleaning liquid is impregnated in the receiving tray 68 in the sheet 59.

By operating each air cylinder 95 to advance each slide frame 85 and cassette body 22, the cleaning head
The sheet 55 is pressed against the peripheral surface of the drum 11 by the film 55 via the film 56. At this time, a sponge cleaning head 55
Is elastically compressed, the elastic force of the cleaning head 55 becomes a pressing force for pressing the sheet 59 against the peripheral surface of the drum 11.
Further, since the pressing surface 55a of the cleaning head 55 is inclined toward the center axis of the drum 11, the pressing surface 55a of the cleaning head 55 is
Can be brought into substantially parallel contact with the peripheral surface of the drum 11 so that the wide surface of the sheet 59 can be pressed against the peripheral surface of the drum 11.

The rotation of the drum 11 by the driving mechanism of the printing press and the rotation of the winding shaft 61 by the driving of the motor 102 of the sheet feeding means 101 allow the sheet 59 to rotate.
Is wound on the winding shaft 61 from the roll shaft 60 and is moved in a direction opposite to the rotation direction of the drum 11.

As a result, the peripheral surface of the drum 11 is cleaned while being rubbed by the sheet 59 impregnated with the cleaning liquid. Therefore, dirt such as ink and paper dust attached to the drum 11 is transferred to the sheet 59 and is scraped off by the movement of the sheet 59, so that the dirt deposited on the sheet 59 falls to the printing machine or becomes dirty. Without adhering to the drum 11 again,
Cleaning is performed smoothly and reliably.

After the cleaning with the cleaning liquid is completed, by stopping the supply of the cleaning liquid, the drum 11 can be wiped dry with the dried sheet 59.

When the cleaning of the drum 11 is completed, the rotation of the drum 11 is stopped, the motor 102 is stopped to stop the movement of the sheet 59, and the air cylinder 95 is operated to operate the slide frame 85 and the cassette. The body 22 is retracted, and the sheet 59 is separated from the drum 11.

When the cassette body 22 is to be removed,
Perform the procedure in the reverse order of the above-mentioned mounting. That is, the stopper 93 is rotated below the cassette receiving plate 87, and the cassette body 22 is rotated.
By moving the cassette frame 31 on the right side of the cassette body 22 to the cassette receiving plate of the slide frame 85 on the right side.
Then, the cassette body 22 is moved rightward by slightly lifting the right side of the cassette body 22, and the left cassette frame 31 of the cassette body 22 is removed from the cassette receiving plate 87 of the left slide frame 85.

When all the sheets 59 wound around the roll shaft 60 are wound around the winding shaft 61, the used sheet 59 is removed from the winding shaft 61 by the cutting means 121 and replaced with a new sheet 59. .

In order to remove the used sheet 59 from the winding shaft 61 by the cutting means 121, the rotational position of the winding shaft 61 must be changed to the groove portion.
After aligning 127 so that it corresponds to the position of slitter 123, lower slitter 123
3 into the one end of the groove 127, and the slitter 123 is moved in the other direction along the axial direction of the winding shaft 61, so that the slitter 123 can move the sheet 59 radially over the entire area in the sheet width direction. Cut into pieces.

At this time, the slitter 123 is formed by the groove 127.
Since the cutting movement can be guided, the sheet 59 can be surely cut.

Then, in order to cut the used sheet 59 wound on the winding shaft 61 by the slitter 123 in the radial direction over the entire area in the sheet width direction, the sheet 59 is wound on the winding shaft.
It is possible to eliminate the sheet 59 in a compact state as compared with the state in which the sheet 59 has been wound up, and it is possible to easily and efficiently remove the used sheet 59 in a small space.

Next, FIG. 5 shows a second embodiment.

This shows another embodiment of the cutting means 121. A guide body 131 having a concave guide groove 130 in which the tip of a slitter 123 is slidably engaged is wound around the winding shaft 61. It is arranged along the axial direction of the take-up shaft 61.

When attaching the leading end of the sheet 59 to the winding shaft 61,
The front end of the sheet 59 can be locked to the guide body 131, and no locking means such as an adhesive tape for stopping the sheet 59 is required.

In order to remove the used sheet 59 from the winding shaft 61 by the cutting means 121, the rotation position of the winding shaft 61 is adjusted so that the guide groove 130 of the guide body 131 corresponds to the tip position of the slitter 123. After aligning to the slitter
By engaging the tip of 123 with the guide groove 130 of the guide body 131 and moving the slitter 123 toward the other end along the axial direction of the winding shaft 61, the sheet 59 is moved by the slitter 123.
Is cut in the radial direction over the entire area in the sheet width direction.

At this time, the tip of the slitter 123 is engaged with the guide groove 130 of the guide body 131, so that the slitter 12
The cutting movement of No. 3 can be guided, and the sheet 59 can be cut reliably.

Then, in order to cut the used sheet 59 wound on the winding shaft 61 by the slitter 123 in the radial direction over the entire area in the sheet width direction, the sheet 59 is wound on the winding shaft.
It is possible to eliminate the sheet 59 in a compact state as compared with the state in which the sheet 59 has been wound up, and it is possible to easily and efficiently remove the used sheet 59 in a small space.

[0077]

According to the first aspect of the present invention, the used sheet wound around the winding shaft by the cutting means is cut in the radial direction over the entire area in the sheet width direction. Since the sheet can be eliminated as a compact state as compared with the state where the sheet is still wound around the winding shaft, the used sheet can be easily and efficiently eliminated in a small space.

According to the drum cleaning device for a printing press according to the second aspect, in addition to the effect of the drum cleaning device for a printing press according to the first aspect, as a cutting means, a slitter is provided along the axial direction of the winding shaft. By moving, the sheet can be reliably cut in the radial direction over the entire area in the sheet width direction.

According to the drum cleaning device for a printing press according to the third aspect, in addition to the effect of the drum cleaning device for a printing press according to the second aspect, the groove into which the slitter enters the peripheral surface of the winding shaft is formed in the axial direction. , Can guide the cutting movement of the slitter.

According to the drum cleaning device for a printing press according to the fourth aspect, in addition to the effect of the drum cleaning device for a printing press according to the third aspect, the winding shaft is formed in a hollow cylindrical shape, and the groove portion is wound. Since the shaft is penetrated through the inner and outer surfaces of the shaft, when the leading end of the sheet is mounted on the winding shaft, the leading end of the sheet can be locked to the winding shaft by inserting and mounting the leading end of the sheet in the groove, and the sheet can be stopped. Locking means such as an adhesive tape can be eliminated.

According to the drum cleaning device for a printing press according to the fifth aspect, in addition to the effect of the drum cleaning device for a printing press according to the fourth aspect, a guide body for guiding the tip of the slitter to the peripheral surface of the winding shaft. Because it was provided along the axial direction of the winding shaft,
Guides the cutting movement of the slitter, and furthermore, when attaching the leading edge of the sheet to the winding shaft, the leading edge of the sheet can be locked to the guide body, eliminating the need for locking means such as adhesive tape to stop the sheet. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cutting unit of a drum cleaning device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the drum cleaning device.

FIG. 3 is a plan view of the drum cleaning device.

FIG. 4 is a perspective view of the drum cleaning device in an exploded state.

FIG. 5 is a perspective view of a cutting unit of a drum cleaning device according to a second embodiment of the present invention.

[Explanation of symbols]

 11 Drum 47 Head unit as cleaning means 59 Sheet 61 Winding shaft 121 Cutting means 123 Slitter 124 Guide means 127 Groove 131 Guide body

Claims (5)

[Claims] 1. A cleaning means for cleaning a drum by bringing a belt-shaped sheet into contact with a peripheral surface of a printing machine, a winding shaft for winding a sheet discharged from the cleaning means, and a winding shaft wound on the winding shaft. And a cutting means for cutting the sheet in the radial direction over the entire area in the sheet width direction. 2. A drum cleaning apparatus according to claim 1, wherein said cutting means has a slitter and guide means for moving said slitter along an axial direction of a winding shaft. apparatus. 3. The drum cleaning device for a printing press according to claim 2, wherein a groove portion into which the slitter enters is formed along the axial direction of the winding shaft on the peripheral surface of the winding shaft. 4. The drum cleaning device for a printing press according to claim 3, wherein the winding shaft is formed in a hollow cylindrical shape, and the groove penetrates the inner and outer peripheral surfaces of the winding shaft. 5. The drum of a printing press according to claim 2, wherein a guide body for guiding the tip of the slitter is provided along the axial direction of the winding shaft on the peripheral surface of the winding shaft. Cleaning device.