JP4988415B2 - Cleaning device for printing press - Google Patents

Description

  The present invention includes a cleaning cloth and a winding shaft for winding the cleaning cloth, which are described in the premise of claim 1, and the winding shaft has a longitudinal groove and a cross section of the winding shaft. The present invention relates to a cleaning device for a printing press having a clamp rod that is positionably supported in a longitudinal groove so as to change.

  Such a cleaning device is described in Patent Literature 1 and Patent Literature 2.

In the latter prior art (Patent Document 2), the problem that the cleaning cloth dries and does not sag and the friction between the cleaning cloth and the winding shaft increases is satisfactorily solved. The key to this solution is a clamp rod that protrudes significantly from the take-up shaft in the first position and slightly protrudes from the take-up shaft in the second position. When the clamp rod is in the first position, the portion around the cloth, which is a part of the cleaning cloth, is lifted from the inner side, and is clamped to the take-up shaft. By rotating the clamp rod from the first position to the second position, the wound portion of the cloth is wound between the clamp rod and the wound layer inside the wound portion of the cloth. It is possible to have a play that allows it to be easily pulled down in the axial direction. However, in this case, the friction problem between the clamp rod and the inner winding layer has not yet been solved. This friction can be very large, which makes it very difficult to rotate the clamp rod to loosen the tension on the wound portion of the fabric.
European Patent Specification No. 0795402B1 German Patent Application Publication No. 102005034041A1

  Then, the objective of this invention is providing the cleaning apparatus which can adjust a clamp rod position easily.

  This object is achieved by a cleaning device having the features of claim 1. The cleaning device of the printing press according to the present invention includes a cleaning cloth and a winding shaft for winding the cleaning cloth, the winding shaft in the longitudinal direction so as to change the longitudinal groove and the cross section of the winding shaft. It has a clamp rod supported so that position adjustment is possible in a slot, and an intermediate layer is arranged between a clamp rod and cleaning cloth.

  That is, the clamp rod is no longer in direct contact with the cleaning cloth, but indirectly through the intermediate layer. When the clamp rod is in direct contact with the cleaning cloth, the friction value between the clamp rod and the intermediate layer can be made smaller than the friction value generated between them. Therefore, it is possible to easily adjust the position of the clamp rod when the tension is loosened, even though the tension force is exerted on the cleaning cloth by the clamp rod.

  Various development examples are possible for the cleaning device according to the invention. For example, instead of only one clamp rod, two clamp rods may be provided. The one or each clamp rod may have an eccentric profile that changes the cross-section of the winding shaft through deformation of the intermediate layer when the one or each clamp rod is rotated. Similarly, one or each clamp rod may be adapted to be pulled axially relative to the take-up shaft in order to change the cross-section of the take-up shaft through deformation and / or movement of the intermediate layer. In both cases with one or more pivotable clamp rods and with one or more tensionable clamp rods, the intermediate layer may be a sheet metal.

  Using one clamp rod or a plurality of clamp rods, rotating or inserting one or each clamp rod to the appropriate position before the cleaning cloth is held on the take-up shaft, It is possible to increase the cross-section that the layers together form. After the cleaning cloth is wound around the winding shaft and the intermediate layer, the cleaning cloth abuts them tightly without slack. One or each clamp rod is moved to the other position so that the wound portion of the cloth, which is part of the cleaning cloth, can be pulled out of the take-up shaft laterally without the need for extra force. The section formed by the winding shaft and the intermediate layer can be made smaller, and there can be play between the winding shaft and the wound portion of the cloth.

  Other developments are described in the dependent claims.

  In one development, the intermediate layer can be deformed by adjusting the position of the clamp rod.

  In another development, the intermediate layer can be adjusted by adjusting the position of the clamp rod.

  In another development, the intermediate layer is arranged to be radially adjusted when the clamp rod is adjusted.

  In another development, in addition to the clamp rod described above, there is another similar clamp rod arranged in the same longitudinal groove, both clamp rods not being connected to each other and facing each other rod end Has a part. This development is particularly preferred in a cleaning device when the width of the printing plate is large, since both clamp rods may be configured to be relatively short and therefore both are easy to handle.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a cleaning device 1 for a printing press. The cleaning device 1 includes a cleaning cloth 2 that can be fed out from the first winding shaft 3 and can be wound around the second winding shaft 5. At the time of cleaning, the cleaning cloth 2 is pressed against the cylinder to be cleaned by the pressing member 4.

  FIG. 2 a shows that the second winding shaft 5 has a first longitudinal groove 6 and a second longitudinal groove 7. A first clamp rod 8 and a second clamp rod 9 are arranged in the first longitudinal groove 6. The rod end 15 inside the first clamp rod 8 and the rod end 16 inside the second clamp rod 9 are not connected to each other. There is a relatively wide spacing between rod ends 15 and 16. A third clamp rod 10 and a fourth clamp rod 11 are housed in the second longitudinal groove 7.

  As a variant, instead of the third clamp rod 10 and the fourth clamp rod 11 in the second longitudinal groove 7, it extends substantially over the entire length of the second longitudinal groove 7, in principle. A single clamp rod that functions in the same manner as the third and fourth clamp rods 10 and 11 may be accommodated.

  FIG. 2b shows the second longitudinal groove 7 having a dovetail cross section.

  FIG. 3a shows that the first longitudinal groove 6 also has a dovetail cross section and the clamp rod 8 has a triangular cross section. The clamp rod 9 (see FIG. 2a) is configured similarly to the clamp rod 8.

  The clamp rod 10 has a cross section in which one direction is thicker than a direction perpendicular to the direction. The fourth clamp rod 11 is configured in the same manner as the third clamp rod 10. The cleaning cloth 2 is disposed between the third clamp rod 10 and the inner wall of the second longitudinal groove 7 extending over the entire length of the winding shaft 5 in the same manner as the first longitudinal groove 6 (see FIG. 2a). One end of the is sandwiched. The clamp rod 10 does not protrude radially outward from the longitudinal groove 7.

  Between the first clamp rod 8 and the cloth-wrapped part (Tuchwickel) 17 is arranged an intermediate layer 12 projecting radially outward from the first longitudinal groove 6. The intermediate layer 12 is made of a spring-like thin metal plate and has a mountain-shaped cross section. The intermediate layer 12 extends substantially over the entire length of the longitudinal groove 6. The intermediate layer 12 protrudes outward from the circumferential line of the winding shaft 5, thereby increasing the cross section of the winding shaft 5. When the clamp rod 8 is inserted into the longitudinal groove 6, the clamp rod 8 presses the intermediate layer 12 from the inside toward the portion 17 where the cloth is wound. As a result, the portion 17 on which the cloth is wound is tightly stretched around the winding shaft 5.

  The clamping rods 8, 9 can be inserted more easily into the longitudinal groove 6, while being able to be inserted into the intermediate space between the winding shaft 5 and the intermediate layer 12, so that the intermediate layer 12 In order to be lifted in the radial direction, each clamp rod 8, 9 has a tip 18 at the inner rod ends 15, 16 respectively. The tip 18 may be pyramidal, conical, truncated pyramid, or frustoconical.

  In order to allow the cloth-wrapped portion 17 to be pulled down from the take-up shaft 5 in the axial direction, the clamping of the cloth end in the second longitudinal groove 7 is released and the cloth-wrapped portion 17 is removed. It is also released in the same manner that is tightly stretched around the take-up shaft 5. In order to release the clamping of the fabric end, the clamping rod 10 is turned from the angular position shown in FIG. 3a to an angular position perpendicular thereto and pulled out from the second longitudinal groove 7 in the axial direction. In order to loosen the tension of the wound portion 17 of the fabric, the clamping rod 8 is pulled axially out of the first longitudinal groove 16 and thereby withdrawn from the region below the intermediate layer 12. At this time, the clamp rod 8 is dragged in contact with the intermediate layer 12, but since this is performed with a small amount of friction, it can be easily pulled out. As a result of the clamping rod 8 being pulled out, a free space is created in which the intermediate layer 12 can be adjusted in the radial direction toward the center of the winding shaft 5. By this position adjustment, the intermediate layer 12 penetrates more deeply into the first longitudinal groove 6, so that the fabric is wound between the intermediate layer 12 and the inner winding layer of the fabric-wrapped portion 17. There is a play allowing the part 17 to be pulled down more easily from the winding shaft 5 and the intermediate layer 12.

  In order to make it easier to pull the clamp rods 8, 9 out of the winding shaft 5, thereby lowering the intermediate layer 12 radially inwardly, each clamp rod has a respective protruding slightly from the winding shaft 5. A grip 19 having two recesses into which the middle finger and the index finger can be inserted, for example, is provided at the end of the outer rod.

  FIG. 3b shows the winding shaft 5 from which the clamp rods 8 to 11 have been taken out. What is important is that when the clamp rod 8 is pulled out from the longitudinal groove 6 in the axial direction, it is not dragged in contact with the cloth-wrapped portion 17 but in contact with the intermediate layer 12. is there. Since the intermediate layer 12 is much smoother than the cleaning cloth 2, when the clamp rod 8 is pulled out, the friction caused between the clamp rod 8 and the intermediate layer 12 is relatively small.

  4a and 4b show an embodiment which is a modification of the embodiment shown in FIGS. 3a and 3b. In the embodiment shown in FIGS. 4a and 4b, there is also a second longitudinal groove 7, a third clamp rod 10 and a fourth clamp rod 11, which are not shown in the drawings. This embodiment is substantially different from the embodiment shown in FIGS. 3a and 3b only in the way in which the first clamp rod 8 and the second clamp rod 9 move.

  In FIGS. 4 a and 4 b, taking the first clamping rod 8 as an example, the clamping rods 8, 9 are turned by about 90 ° in the longitudinal groove 6 in order to raise and lower the intermediate layer 12 in the radial direction. It is shown. The clamp rod 8 has a rod cross section including a narrow dimension part and a wide dimension part perpendicular thereto. In order to lift the intermediate layer 12 in the radial direction and thereby increase the cross-section of the winding shaft 5, the clamping rod 8 is shown in FIG. It is turned so that it is at an angular position. The rod cross section of the clamp rod 8 configured as an eccentric member is arranged in a so-called vertical direction. In order to lower the intermediate layer 12 in the radial direction, thereby reducing the cross-section of the winding shaft 5 and providing play between the intermediate layer 12 and the wound portion 17 of the fabric, the clamp rod 8 is The narrow dimensioned section of the cross section is turned to the angular position shown in FIG. 4b, which extends substantially radially.

  The pivoting of the clamp rod 8 from the angular position shown in FIG. 4a to the angular position shown in FIG. 4b is very high even though the intermediate layer 12 is pressed against the clamp rod 8 at that time. Easy to do. The intermediate layer 12 that is a spring-like thin metal plate and has a mountain-shaped cross section has a smooth inner surface that contacts the clamp rod 8. Since this inner surface is so smooth, the friction between the clamp rod 8 and the intermediate layer 12 when the clamp rod 8 is rotated is the friction when the clamp rod 8 is in direct contact with the wound portion 17 of the cloth. Smaller than.

  In FIG. 4b, the winding shaft 5 is shown when the wound portion 17 of the fabric is pulled down. The intermediate layer 12 has a leg 13 that is placed in a slit 14. When the position of the intermediate layer 12 is adjusted in the radial direction, elastic deformation of the intermediate layer 12, that is, spring deformation of the leg portion 13 is performed.

It is a figure which shows the cleaning apparatus. It is a figure which shows the winding shaft of the cleaning apparatus of FIG. It is a side view which shows the winding shaft of FIG. FIG. 3 is a detailed view of the take-up shaft of FIG. 2b, with the portion of the fabric wound tightly on the take-up shaft. FIG. 3b is a detailed view of the winding shaft of FIG. 3a with the tension of the wound portion of the fabric relaxed. FIG. 3 shows another embodiment of the winding shaft of FIG. 2b. FIG. 3 shows yet another embodiment of the winding shaft of FIG. 2b.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cleaning apparatus 2 Cleaning cloth 3 1st winding shaft 4 Pressing member 5 2nd winding shaft 6 1st longitudinal direction groove | channel 7 2nd longitudinal direction groove | channel 8 1st clamp rod 9 2nd clamp rod 10 Third clamp rod 11 Fourth clamp rod 12 Intermediate layer 13 Leg portion 14 Slit 15 Rod end portion 16 Rod end portion 17 Cloth-wrapped portion 18 Pointed end portion 19 Grip

Claims (4)

Comprises a cleaning cloth (2), a winding shaft for winding said cleaning cloth (2) (5), wherein the winding shaft (5) includes a longitudinal groove (6), before Symbol longitudinal grooves having at least one clamp rod is supported in the (6) (8), a,
An intermediate layer (12) is disposed between the clamp rod (8) and the cleaning cloth (2), and the intermediate layer (12) is formed on the intermediate layer (12) by adjusting the position of the clamp rod (8). The position can be adjusted between a position where a part is pushed to the outside of the longitudinal groove (6) and a position where all of the intermediate layer (12) is accommodated inside the longitudinal groove (6). The friction force acting between the clamp rod (8) and the intermediate layer (12) is the friction acting between the clamp rod (8) and the cleaning cloth (2) when they are in direct contact with each other. Cleaning device for printing press, which is smaller than force .   The cleaning device according to claim 1, wherein the intermediate layer (12) is deformable by adjusting the position of the clamp rod (8). The cleaning device according to claim 1 , wherein the intermediate layer (12) is arranged to be radially adjusted when the clamp rod (8) is adjusted. The clamp rod (8) and another similar clamp rod (9) arranged in the same longitudinal groove (6) are not connected to each other and face the rod ends (15, 16) The cleaning apparatus according to any one of claims 1 to 3 , further comprising:

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