JPH0444370Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cylinder cleaning device for cleaning various cylinders such as a blanket cylinder and an impression cylinder of an offset printing machine, and in particular, the present invention relates to a cylinder cleaning device that cleans various cylinders such as a blanket cylinder and an impression cylinder of an offset printing machine. The present invention relates to the structure of a pressure pad suitable for increasing durability and the structure of its support portion.

[Prior Art] In an offset printing machine, when printing continues for a certain period of time, paper dust, ink, etc. remain and accumulate on the cylinder such as a blanket cylinder, and the surface thereof becomes dirty. In order to clean this dirt, a cylinder cleaning device as shown in FIGS. 6 and 7 is known.

In FIG. 6, a pair of cloth supply rolls 20 and a cloth take-up roll 24 are connected to a pair of side plates 3 attached to frames on both sides of the printing press body.
0, and can be attached to and detached from a rotating shaft parallel to the rotating shaft of the cylinder 10. pair of rolls 20
Both ends of the belt-shaped cleaning cloth 22 are wound around and 24, and a predetermined tension is applied thereto. The cloth take-up roll 24 is intermittently driven to rotate at a predetermined speed by a drive device (not shown). A support bar 36 having a substantially L-shaped cross section is provided between and parallel to the rolls 20 and 24, and both ends of the support bar 36 are fixed to the side plate 30. A back up bar 34 is attached to a portion of the support bar 36 facing the cylinder 10, and a pressure pad 40 for pressing the cleaning cloth 22 against the cylinder 10 is attached airtightly by a clamp 36. Backup bar 34
The air chamber 38 formed by the pressure pad 40 and the pressure pad 40 is connected to an externally provided compressor (not shown), and inflates the pressure pad 40 when air is supplied thereto. The pressure pad 40 presses the cleaning cloth 22, which is moved by sliding on its outer surface, against the cylinder 10. The cleaning cloth 22 absorbs the cleaning liquid sprayed from the spray bar 26 and is then pressed by the pressure pad 40 to wipe and clean the outer peripheral surface of the cylinder 10. After that, the cleaning cloth 22 is changed direction by the guide 28 and transferred to the cloth winding roll. It is wound up at 24.

Although the pressure pad 40 of FIG. 7 does not have the air chamber 38 of FIG. 6, the overall cleaning system operates in the same manner.

[Problems to be Solved by the Invention] The conventional example shown in FIG. 6 has the following drawbacks.

a) The manufacturing cost is high because the shape of the portion of the pressure pad 40 fixed by the clamp 36 is complicated.

b. Because the shape of the part of the pressure pad 40 fixed by the clamp 36 is complicated, the work of replacing the pressure pad 40 is troublesome;
It requires tools and a certain level of skill. Moreover, since the work takes time, the efficiency of the printing work decreases.

c. Because the shape of the pressure pad 40 is special, it is impossible to turn it over and use it, and its service life is short.

On the other hand, in the case of the conventional example shown in FIG. 7, it can be used a total of two times if it is attached upside down, but the other drawbacks of the conventional example shown in FIG. 6 have not been fundamentally solved.

The purpose of the present invention is to provide a cylinder cleaning device equipped with a pressure pad that is simple in shape, can be replaced easily and quickly without the use of tools, and can be used repeatedly at least four times. That's true.

[Means for Solving the Problems] In order to achieve the above object, the present invention presses a cleaning cloth that moves relative to the outer circumferential surface of the printing press cylinder against the outer circumferential surface of the cylinder using a pressure pad attached to a support bar. The present invention proposes a cylinder cleaning device for cleaning the outer circumferential surface of a cylinder, in which the pressure pad is made of a tubular elastic body.

The pressure pad can also be a solid cylindrical elastic body.

The entire tubular or cylindrical elastic body is made of the same material, but may have a double structure including a hollow core or a core that is harder than the pad material on the outer periphery.

No matter which pressure pad is used,
The support bar has a right-angled cross section with a depth that is deeper than the radius of the pressure pad and shallower than the diameter, and a width that is approximately equal to the diameter, and an opening that is narrower than the diameter, and a pressure pad housing that extends in the axial direction of the cylinder. Make sure to have a room.

The support bar may include a pressure pad storage chamber having the same shape as the housing portion of the pressure pad, having an opening narrower in width than the diameter of the pressure pad, and extending in the axial direction of the cylinder.

A part of the support bar surrounding the pressure pad storage chamber may be a side plate that is detachable from the support bar body.

[Function] a In the present invention, since the pressure pad is a simple tubular or cylindrical elastic body, the manufacturing cost is low.

b To attach this simple pressure pad to the support bar, just push it into the pad storage chamber, and to remove it, just remove one end in the axial direction and pull it out, so no skill is required and it can be done in a short time. The job can be completed in seconds without reducing printing efficiency.

c. Since the cross-sectional shape of the pressure pad has no directionality, its entire circumferential surface can be used. Therefore, once removed, one pressure pad can be used at least four times by changing its orientation and putting it back on. Therefore, costs can also be reduced in this respect.

[Example] Next, an example of the present invention will be described with reference to FIGS. 1 to 5 of the drawings.

Figure 1 shows the first cylinder cleaning device according to the present invention.
FIG. 3 is a cross-sectional view showing the pressure pad and support bar of the embodiment. Note that the other parts of the cylinder cleaning device are basically the same as, for example, the conventional example shown in FIG. 6, so illustration and description thereof will be omitted.

The pressure pad 41 of this first embodiment is constructed by forming an elastic body into a tubular shape. At the same time, the support bar 31 is connected to the pressure pad 41.
The cylinder has a pressure pad storage chamber 35 extending in the axial direction of the cylinder, having a right angle cross section with a depth deeper than the radius and shallower than the diameter, and a width substantially equal to the diameter, an opening 33 having a width narrower than the diameter, and extending in the axial direction of the cylinder. It's like this.

The procedure for attaching the pressure pad 41 to the support bar 31 will be explained with reference to FIG. When no external force is applied, the diameter of the pressure pad 41 is equal to that of the support bar 31, as shown in FIG.
The width of the opening 33 is larger than the width of the opening 33. Therefore, figure B
As shown in the figure, crush the pad with your fingers and insert it into the pressure pad storage chamber 35. If the finger is released when at least half of the pressed pressure pad 41 has entered the pressure pad storage chamber 35, the pressure pad 41 will return to its original state and will be stored in the pressure pad storage chamber 35 as shown in FIG. In this state, the width of the opening 33 of the support bar 31 is narrower than the diameter of the pressure pad 41, so the pressure pad 41 will not fall off.

On the other hand, the pressure pad 41 is attached to the support bar 3.
To remove it from the support bar 31, place your fingertip in the hollow part at one end of the pressure pad 41 or in the gap between it and the pressure pad storage chamber 35, and pull out a part of the length in the support bar 31 outside the opening 33. After that, all you have to do is grasp the pulled out part and pull it in the direction of the opening 33.

In this way, the pressure pad 41 can be easily attached to and detached from the support bar 31 in a short time without using any tools, so no skill is required. Furthermore, the printing interruption time is shortened, and the efficiency of printing work is not reduced.

Unlike the conventional examples shown in FIGS. 6 and 7, the pressure pad 41 of this embodiment has no directionality in cross section. Therefore, the pressure pad 41 that has been pulled out once after being used for a predetermined period of time must be rotated 90 degrees and reinstalled. If so, the cylinder can be cleaned without any problem. Therefore, when rotating 90 degrees, four sides can be used, so compared to the conventional example, the life is at least twice as long, and the running cost can be reduced accordingly. It goes without saying that it can also be used by rotating it at other angles, for example about 60 degrees.

Figure 2 shows the second cylinder cleaning device according to the present invention.
FIG. 3 is a cross-sectional view showing the pressure pad and support bar of the embodiment. The pressure pad storage chamber 35 of the support bar 31 of this embodiment is formed in substantially the same shape as the pressure pad 41, but with a slightly smaller diameter. The operation and effect obtained are the same as those in the first embodiment, so the explanation will be omitted.

Figure 3 shows the third cylinder cleaning device according to the present invention.
FIG. 3 is a cross-sectional view showing the pressure pad and support bar of the embodiment. This example is shown in FIGS. 1 and 2.
While the illustrated embodiment uses one drawn material as the support bar 31, the support bar 31
The cross section itself is simple, and the portions that sandwich the pressure pad storage chamber 35 from both sides are bolts 3.
The side plate 37 is fixed at 9.

Since the support bar 31 of this embodiment has a simple cross-sectional shape, it has an advantage of lower manufacturing cost compared to other embodiments. In addition, the side plate 37 of this embodiment
At first glance, the clamp 36 appears to be the same as the clamp 36 shown in FIG. 6 or 7, but its convenience is significantly different. That is, the conventional clamp 36 was removed by loosening bolts (not shown) each time the pressure pad 40 was replaced, but the side plate 37 of the present invention does not need to be removed after being fixed with the bolts 39 during manufacturing. Therefore, during use, the same operability as in the embodiment of FIG. 1 can be obtained.

In addition, up to this point, the hollow pressure pad 4
1, that is, a tubular body, the pressure pad is not limited to a tubular body, but can also be a solid cylindrical body. Furthermore, as shown in FIG. 4, a double structure using a pad hollow core 412 or pad core 416 that is harder than the outer pad material 410 or 414 may be adopted for reinforcement or the like.

[Effect of the idea] According to the present invention, the following effects can be obtained.

a) Since the pressure pad is a simple tubular or cylindrical elastic body, manufacturing costs can be reduced.

b To attach this pressure pad to the support bar, just push it into the pressure pad storage chamber, and to remove it, just remove one end in the axial direction and pull it out, so no skill is required and the work can be completed in a short time. and does not reduce printing efficiency.

c. Since the cross-sectional shape of the pressure pad has no directionality, its entire circumferential surface can be used, and once removed, one pressure pad can be used at least four times by changing the direction and attaching it again. Therefore, costs can also be reduced in this respect.

[Brief explanation of the drawing]

Figure 1 shows the first cylinder cleaning device according to the present invention.
2 is a sectional view showing the pressure pad and support bar of the second embodiment of the present invention; FIG. 3 is a sectional view showing the pressure pad and support bar of the second embodiment of the invention;
The figure is a cross-sectional view showing the pressure pad and support bar of the third embodiment of the present invention, Figure 4 is a cross-sectional view showing another example of the pressure pad of the present invention, and Figure 5 is the procedure for installing the pressure pad in the first embodiment. , FIG. 6, and FIG. 7 are side views schematically showing a conventional cylinder cleaning device. 10... Cylinder, 20... Fabric supply roll, 2
2...Washing cloth, 24...Cloth take-up roll, 26
...Spray bar, 30...Side plate, 3
1, 32... Support bar, 33... Opening, 3
4...back up bar, 35...pressure pad storage chamber, 36...clamp, 37...side plate,
38...Air chamber, 39...Bolt, 40,
41...pressure pad, 410,412...
Padded material, 414... Padded hollow core, 416...
Padded core.

Claims (1)

[Claims for Utility Model Registration] 1. A cylinder cleaning device that cleans the outer circumferential surface of a printing press cylinder by pressing a cleaning cloth that moves relative to the outer circumferential surface of the cylinder against the outer circumferential surface of the cylinder using a pressure pad attached to a support bar, comprising: A cylinder cleaning device characterized in that a pressure pad is made of a tubular elastic body. 2. In a cylinder cleaning device in which a cleaning cloth that moves relatively to the outer circumferential surface of a printing press cylinder is pressed against the outer circumferential surface of the cylinder by a presser pad attached to a support bar to clean the outer circumferential surface of the cylinder, the presser pad cleans the outer circumferential surface of the cylinder due to clogging. A cylinder cleaning device characterized by being made of a cylindrical elastic body. 3. The cylinder cleaning device according to claim 1 or 2, wherein the tubular or cylindrical elastic body has a double structure including a hollow core or a core that is harder than the pad material on the outer periphery. . 4. The cylinder cleaning device according to any one of claims 1 to 3, wherein the support bar has a right-angled cross section with a depth that is deeper than the radius of the pressure pad and shallower than the diameter, and a width that is approximately equal to the diameter. A cylinder cleaning device comprising a pressure pad storage chamber having an opening having a width narrower than the diameter and extending in the axial direction of the cylinder. 5. The cylinder cleaning device according to any one of claims 1 to 3, wherein the support bar has an opening having the same shape as the accommodated portion of the pressure pad and having a width narrower than the diameter of the pressure pad. A cylinder cleaning device comprising: a pressure pad storage chamber extending in the axial direction of the cylinder. 6. The cylinder cleaning device according to any one of claims 1 to 5, wherein a part of the support bar surrounding the pressure pad storage chamber includes a side plate that is detachable from the support bar body. .