JPH06106716A - Cylinder cleaning device - Google Patents

Abstract

PURPOSE:To realize the low cost structure of air pad, the assembling, mounting and maintenance of which are easy, of a cylinder cleaning device. CONSTITUTION:An expanding member 9 is made of elastic material and into a simple long hollow column, in which a backup bar 6 having a rectangular section is inserted adheringly closely each other under the condition that gap 21, in which compressed air is introduced, is provided between one surface of the backup bar 6 and the inner surface of the expanding member 9. After that, the resultant air pad assembly is forced in a holder 23. By forcibly feeding compressed air in the gap at cleaning, the expanding member 9 is expanded, resulting in allowing to press cleaning cloth against the outer peripheral surface of a cylinder. By this constitution the expanding member 9 can be accurately produced at low cost. Further, since the assembling can be performed only by forcing the backing body in the expanding member 9, or breakage and consumption of the expanding member 9, the expanding member 9 can easily be changed in a short period of time without employing special jig or technique.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder cleaning device for cleaning a cylinder surface such as a blanket cylinder of an offset printing machine, and more particularly to a cylinder cleaning device of a type in which a cleaning cloth is pressed against the cylinder surface by using an air pad.

[0002]

2. Description of the Related Art For example, paper dust and ink are accumulated on the surface of a blanket wound around a blanket cylinder of an offset printing machine, and the blanket surface is periodically washed to maintain high print quality. There is a need to. As an apparatus for automatically performing this cleaning, various kinds of apparatuses have been proposed.

For example, the cleaning device disclosed in Japanese Patent Publication No. 2-6629 is constructed as shown in FIGS. 13 to 15. In the figure, a strip-shaped cleaning cloth 2 that moves relative to the outer peripheral surface of the blanket cylinder 1 is provided, and both ends of the cleaning cloth 2 are respectively cloth supply rolls 3.
And the cloth winding roll 4. The cloth take-up roll 4 is intermittently driven to rotate in one direction by a cloth feed cylinder 5 via a one-way clutch, which is not shown in the figure, and winds the cleaning cloth 2 at a predetermined speed.

On the opposite side of the cleaning cloth 2 to the blanket cylinder 1, there is provided a backup bar 6 as a holder in the axial direction. The backup bar 6 is a support fixed to a frame 7 of the printer body. It is attached to the bar 8. On the surface of the backup bar 6 facing the cleaning cloth 2, an expansion member 9 having an approximately U-shaped cross section made of an elastic material such as rubber is provided.
Both ends parallel to the axial direction of are fixed to the upper and lower end surfaces of the backup bar 6 by clamp bars 10.
Further, an air passage 11 is axially provided in the backup bar 6.
The air passage 11 is open between the backup bar 6 and the expansion member 9 at a plurality of locations.

In the cylinder cleaning apparatus constructed as described above, compressed air is introduced between the backup bar 6 and the expansion member 9 through the air passage 11 to change the state shown in FIG. 14 to that shown in FIG. Then, the expansion member 9 expands. As a result, the cleaning cloth 2 is pressed against the outer periphery of the blanket cylinder 1, and the surface of the blanket cylinder 1 is cleaned by the relative movement between the rotation of the blanket cylinder 1 and the movement of the cleaning cloth 2. At this time, the header 12 supplies the cleaning water, the solvent, and the drying air to the surface of the blanket cylinder 1. When the cleaning is completed, the compressed air is discharged to contract the expansion member 9, and the cleaning cloth 2 is detached from the surface of the cylinder 1 as shown in FIG.

The cleaning device described in Japanese Utility Model Laid-Open No. 3-90943 is constructed as shown in FIGS. 17 and 18. In the figure, parts corresponding to those of the conventional example shown in FIGS. 13 to 15 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. In this conventional example, the expansion member 9
17 is always expanded by compressed air regardless of the non-cleaning shown in FIG. 17 and the cleaning shown in FIG. 18, and the cleaning cloth 2 is pressed against the blanket cylinder 1 and released from the cleaning unit as a whole with respect to the blanket cylinder. Move forward and backward.

[0007]

In the above-mentioned two conventional examples, as shown in FIGS. 16 and 19, the two parallel sides in the longitudinal direction of the expansion member 9 having a substantially U-shaped cross section are provided with the clamp bar 10. The structure is such that the end face of the backup bar 6 in the longitudinal direction is spread and held by the screw 13 through the screw. Further, both ends of the expansion member 9 are pressure-fixed to the backup bar 6 with screws 15 via the seal plates 14, and this assembly is attached to the support bar 8 with bolts 16. Here, the expansion member 9 has, for example, a width of about 50 mm and a length of about 1
It is made of a long rubber material having a narrow width of 000 mm to 1800 mm.

For this reason, it is very difficult to spread and fix the expansion member 9 to the support bar 8 accurately and uniformly and without distortion, and there is a problem that even if a dedicated jig is used, it requires skill. Therefore, when the expansion member 9 is worn or damaged, it is difficult for the user to replace and maintain the expansion member 9, and a dedicated operator is required. If the expansion member 9 spreads poorly and is distorted or distorted, the cleaning cloth 2
There was a risk that non-uniform pressure bonding to the blanket cylinder 1 would result in poor cleaning. Further, there is a drawback that the shape of each component is complicated, and in particular, the cost for molding the expansion member 9 and the finishing cost become high. An object of the present invention is to provide a cylinder cleaning device that can be easily assembled, installed, and maintained and that can reduce costs.

[0009]

In order to achieve the above object, the present invention is designed so that air is pumped into an inflating member supported by a supporting member to expand the air, and the air moves relative to the outer peripheral surface of the cylinder. A cylinder cleaning device for cleaning the outer peripheral surface of a cylinder by pressing a cleaning cloth against the outer peripheral surface of the cylinder has the following configuration.

That is, in the cylinder cleaning apparatus according to the first aspect of the present invention, the expansion member is formed of an elastic material into a long column hollow body, and a holder having a substantially short cross section is press-fitted into the expansion member, and the holder is attached. One surface of the expansion member is attached to the support member so as to be open, and a gap is provided between the holding member on the open surface and the expansion member to pump the air. Further, in the cylinder cleaning apparatus according to a second aspect of the present invention, the expansion member is formed of an elastic material into a long column hollow body, the expansion member is pressed into a flat shape, and one surface of the support member is opened and attached. Further, in the cylinder cleaning device according to the third aspect, the expansion member is preliminarily molded in a flat shape.

A cylinder cleaning device according to a fourth aspect of the present invention is
The expansion member is composed of a base part and an expansion part having a space through which air is pumped, and an engaging part is provided between the side surface of the base part and the support member to connect them together. The cylinder cleaning device according to claim 5, wherein the expansion member is integrally molded on the front surface and both side surfaces of the support member facing the cylinder, and the air is provided between the outside of the front surface of the support member and the inside surface of the expansion member. Is provided with a void for pumping.

[0012]

According to the cylinder cleaning apparatus of the first to third aspects, since the expansion member is formed of the elastic material into the long cylindrical hollow body having a simple shape, it can be manufactured inexpensively and accurately. Moreover, since the assembly can be performed by simply pressing the holder having a simple shape into the expansion member, no special jigs or tools are required when the expansion member is damaged or worn, and the replacement can be easily and quickly performed. . In addition, by sending compressed air to the gap formed between the one surface of the holding body and the expansion member,
The expansion member can be easily expanded and the cleaning cloth can be pressed against the outer peripheral surface of the cylinder for cleaning.

According to the cylinder cleaning apparatus of the fourth aspect, since the base portion of the expansion member is supported by the support member by the engagement, the expansion member can be firmly held.
Easy to assemble. According to the cylinder cleaning device of claim 5, since the expansion member is integrally formed on the outer periphery of the support member, the assembly and replacement work of the expansion member is performed by simply bolting the integrally formed product to the support bar. Good and easy work.

[0014]

Embodiments of the cylinder cleaning apparatus of the present invention will be described below with reference to the drawings. The parts of this embodiment shown in each drawing corresponding to the parts of each conventional example shown in FIGS. 13 to 19 are designated by the same reference numerals, and the description thereof will be omitted as appropriate. Further, since the structure of the cylinder cleaning device main body is almost the same as that of the conventional example, only the structure of the air pad which is the feature of the present invention will be described.

1 to 5 show the configuration of a first embodiment of the present invention. As shown in FIGS. 3 and 4, the expansion member 9 is made of an elastic material and is formed into a simple cylindrical shape. As shown in FIGS. 1 and 2, a backup bar 6 as a holding body having a substantially short cross section is inserted into the inner periphery of the expansion member 9. Inner circumference of expansion member 9 and backup bar 6
The outer peripheral length is substantially equal to the outer peripheral length, and when the backup bar 6 is inserted into the inner peripheral portion of the expansion member 9, a slightly rigid fit is achieved such as sliding.

On one surface of the backup bar 6, a void 21 is formed so as to communicate with each other in the longitudinal direction, and an air introduction hole 11 is provided in the longitudinal direction at approximately the center of the cross section. The air introduction hole 11 and the void 21 are communicated with each other through the communication holes 22 at a plurality of places. The expansion member 9 into which the backup bar 6 is fitted is press-fitted into a recess having a substantially U-shaped cross section formed in the longitudinal direction of the holder 23 as a support member. Further, both ends in the longitudinal direction of the expansion member 9 are pressure-fixed to the backup bar 6 with screws 15 via the seal plate 14, and the vicinity of both ends of the seal plate 14 are pressure-fixed to the holder 23 via the screws 24. . In this state, both ends of the space 21 are pressure-bonded and sealed by the seal plates 14, and the space 21 is sealed by the seal plate 1.
An air chamber is formed between the four.

The air pad assembly constructed as described above is fixed to the support bar 8 by bolts 16. According to this embodiment, since the expansive member 9 which is a consumable component has a simple cylindrical shape, it can be manufactured inexpensively and accurately. Further, the shape of each part such as the backup bar 6 and the holder 23 is similarly simple, so that the cost can be reduced. In addition, since the assembly of the air pad is very easy, no special jigs and tools are needed when the pad is damaged or worn out, and even an operator outside the field can easily replace the expansion member 9 in a short time at the site of use. Can be done
Maintenance workability is improved.

6 to 8 show the configuration of the second embodiment of the present invention. In this embodiment, a void 21 is formed in the expansion member 9 in the longitudinal direction. The expansion member 9 is formed in a long column hollow body, and the shape of the expansion member in a state of being supported by the support member 23 is flat compressed or preliminarily molded flat. . Further, one side wall of the recess of the holder 23 is protruded inward along the longitudinal direction so that the protrusion 2
3a is provided, and the other side wall is the clamp bar 31 as a detachable clamp member.

The clamp bar 31 is detachably fixed to the other side wall of the holder 23 by a plurality of screws 32, and the protruding end is bent inward to form a protruding portion 31a. Then, the bottom surface of the concave portion of the holder 23 and the protruding portion 23a,
The expansion member 9 is held by 31a. Therefore, the backup bar 6 in the first embodiment is unnecessary, and the structure is further simplified. In addition, the clamp bar 31
By attaching and detaching, the expansion member 9 can be easily replaced.

9 and 10 show the configuration of the third embodiment of the present invention. The inflatable member 9 is composed of a base portion 9a for supporting the support member 23 and an inflatable portion 9b having a gap 21 through which air is pumped, and the side surface of the base portion 9a is provided with the support member 23 as shown in FIG. 9B. A recessed portion 9c is formed in which the protruding portions 23b and 31b are fitted and engaged with each other. here,
The protrusions 23b and 31b and the recess 9c constitute an engaging portion for supporting the expansion member 9 on the support member 23, and the structure thereof is not limited to the above-described embodiment, and for example, the protrusion may be formed on the expansion member. Alternatively, the support member may be provided with a recess.
According to the present embodiment, the protrusions 23b and 31b are engaged with the side surfaces of the expansion member 9, respectively, so that the expansion member 9 can be firmly held by the holder 23 and the clamp bar 31. The same effect as the example can be obtained.

11 and 12 show the configuration of the fourth embodiment of the present invention. In this embodiment, the holder 23 in the first embodiment shown in FIGS. 1 to 5 is unnecessary, and the expansion member 9 is integrally formed by covering the three outer peripheral surfaces of the backup bar 6. Further, a gap 21 is formed between the surface of the backup bar 6 opposite to the surface attached to the support bar 8 and the inner surface of the expansion member 9, and the compression is performed via the air introduction hole 22 and the communication hole 22. Air is introduced into the space 21. Further, wedge-shaped recesses 6a are formed on both side surfaces of the support bar 8, and the expansion member 9 enters the recesses 6a at the time of integral molding and is firmly coupled.

According to this embodiment, the same effect as that of each of the above embodiments can be obtained. In particular, a clamp member for crimping the expansion member 9 to the backup bar 6 is not necessary, so that the pressure contact width of the pad to the cylinder can be correspondingly increased. In each of the above-mentioned embodiments, the blanket cylinder cleaning device of the offset printing machine has been described, but the same effect can be obtained by applying the cleaning device to other cylinders.

[0023]

As described above, according to the cylinder cleaning device of the present invention, since the structure for attaching the expansion member to the support member is simplified, the air pad of the cleaning device can be easily assembled, attached and maintained. It is possible to reduce the costs of parts, manufacturing, assembly, and maintenance.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the configuration of a first embodiment of an air pad of a cylinder cleaning device of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view showing the configuration of the expansion member of FIG.

FIG. 4 is a side view of FIG.

5 is an exploded perspective view of FIG. 1. FIG.

FIG. 6 is a vertical sectional view showing a configuration of a second exemplary embodiment of the present invention.

FIG. 7 is a side view of FIG.

FIG. 8 is an exploded perspective view of FIG.

9 shows a configuration of a third embodiment of the present invention, and FIG.
FIG. 9A is a vertical sectional view, and FIG. 9B is a side view of an end surface side of the expansion member.

FIG. 10 is an exploded perspective view of FIG.

FIG. 11 is a vertical cross-sectional view showing the configuration of the fourth exemplary embodiment of the present invention.

FIG. 12 is an exploded perspective view of FIG. 11.

FIG. 13 is a perspective view showing the configuration of an example of a conventional cylinder cleaning device.

FIG. 14 is an explanatory diagram showing a state of the expansion member in FIG. 13 when not being washed.

FIG. 15 is an explanatory diagram showing a state of the expansion member at the time of cleaning shown in FIG.

FIG. 16 is an assembly explanatory diagram of the air pad of FIG. 13.

FIG. 17 is an explanatory diagram showing a state of another example of the configuration of the conventional cylinder cleaning device during non-cleaning.

FIG. 18 is an explanatory diagram showing a state at the time of cleaning in FIG.

FIG. 19 is an assembly explanatory diagram of the air pad of FIG. 17.

[Explanation of symbols]

1 Cylinder, 2 Cleaning Cloth, 6 Backup Bar (Holder), 9 Expansion Member, 21 Void, 23 Holder (Support Member), 31 Clamp Bar (Clamp Member), 23
b, 31b protrusion

Claims (5)

[Claims] 1. An air blowing member is inflated by a supporting member to expand the air, and a cleaning cloth moving relative to the outer peripheral surface of the cylinder is pressed against the outer peripheral surface of the cylinder.
In a cylinder cleaning device for cleaning the outer peripheral surface, the expansion member is formed of an elastic material into a long column hollow body, and a holder having a substantially short cross section is press-fitted into the expansion member, and the holder is the expansion member. A cylinder cleaning device, characterized in that it is integrally attached to the support member with one surface open, and a gap is provided between the holding body on the open surface side and the expansion member to pump the air. 2. A cleaning cloth, which moves relative to the outer peripheral surface of the cylinder, is pressed against the outer peripheral surface of the cylinder by injecting air into the expandable member supported by the supporting member to expand the air.
In the cylinder cleaning device for cleaning the outer peripheral surface, the expansion member is formed of an elastic material into a long column hollow body, the expansion member is pressed into a flat shape, and one surface is attached to the support member so as to be open. Cylinder cleaning device. 3. The cylinder cleaning device according to claim 2, wherein the expansion member is molded in a flat shape in advance. 4. A cleaning cloth moving relative to the outer peripheral surface of the cylinder is pressed against the outer peripheral surface of the cylinder by sending air into the expandable member supported by the supporting member to expand the air.
In the cylinder cleaning device for cleaning the outer peripheral surface, the expansion member includes a base portion and an expansion portion having a gap to which air is pumped, and an engaging portion that couples both the side surface of the base portion and the support member. A cylinder cleaning device, which is provided. 5. In the cylinder cleaning device, a cleaning cloth that moves relative to an outer peripheral surface of a cylinder by pumping air into the expansion member supported by a support member to expand the air, and supports the expansion member by the support. A front surface and both side surfaces of the member facing the cylinder are integrally formed, and a space for pumping the air is provided between an outer surface of the front surface of the support member and an inner surface of the expansion member. Cylinder cleaning device.