WO2003106174A1

WO2003106174A1 - Split block drum

Info

Publication number: WO2003106174A1
Application number: PCT/JP2003/007659
Authority: WO
Inventors: 鈴木　英昭
Original assignee: 株式会社ゴスグラフィックシステムズジャパン
Priority date: 2002-06-17
Filing date: 2003-06-17
Publication date: 2003-12-24
Also published as: JPWO2003106174A1; JP3950890B2; AU2003241713A1

Abstract

A split block drum (1), wherein the outer diameter dimensions of a base part (41) and a shaft end part (42) are machined smaller by the amount of thickness of a thermally sprayed layer (60), molybdenum steel (JIS: YGTM) is thermally sprayed on the outer peripheral surfaces of these base metals to form thermally sprayed layers (60) and sliding surfaces are formed on these thermally sprayed layers (60), whereby the split block drum capable of smoothly moving a cylindrical part in axial and circumferential directions even if the shaft part is closely fitted to the cylindrical part to assure a more excellent printing quality.

Description

Description Split-plate cylinder Technical field

The present invention relates to a divided plate cylinder, in particular, by spraying a metal suitable for sliding onto a cylindrical portion and a Z or shaft portion, and forming a sliding surface on the sprayed layer, thereby forming the sliding portion in the axial direction (left and right directions) of the cylindrical portion. ) And a divided plate cylinder with smooth movement in the circumferential direction (vertical direction). Background art

Conventionally, in a rotary press for newspaper printing that performs monochromatic printing, register adjustment is generally performed by moving the entire plate cylinder.

In contrast, newspaper printing presses that perform multi-color printing required the technical ability to perform separate register adjustments on the operating and driving sides in order to accurately overlay each color. FIG. 5 is a schematic side view for explaining the structure of the divided plate cylinder that enables separate register adjustment.

In the same figure, the divided plate cylinder 10.0 is the driving side cylinder 12.0 and the driving side plate cylinder 1 20 0, the registration of which is adjusted by the motor 1992, and the operation side And the operation-side plate cylinder 1 110, which is registered and adjusted by the left and right register motors 1 and 4.

Further, the divided plate cylinder 100 is rotatably supported by the housing by bearings so as to face the blanket month 130.

The outside of the housing is shown in a cross-section without hatching for easy understanding.

The drive-side plate cylinder 120 has a core portion extending to the operation-side casing. As the core portion, a cylindrical base portion 141 and a cylindrical shape protruding from the center of the end surface of the base portion 141 are provided. And a shaft portion 140 composed of the shaft end portion 142 of the projection.

The outer peripheral surface of the base portion 141 and the outer peripheral surface of the shaft end portion 142 are polished in order to enhance slidability.

The operation side plate cylinder 1 1 0 has the same outer diameter and shaft 1 4 as the outer diameter of the drive side plate cylinder 1 2 0. 0, a cylindrical plate body 151, having an inner diameter that is fit into the base 141, and an annular side plate 152 formed on the operation side end surface of the plate body 151, and a side plate. Cylindrical cylindrical shaft 1 which protrudes from the center of 152 to the operating side and has an outer diameter fitted into the bearing and an inner diameter fitted to the shaft end 140 of the shaft 140 The cylindrical portion 150 composed of 53 is fitted into the shaft portion 140.

The inner peripheral surface of the plate body 15 1 and the inner peripheral surface of the cylindrical shaft 15 3 are polished in order to enhance the slidability.

Note that the outer peripheral surface of the plate cylinder portion 151 is the plate cylinder surface of the operation-side plate cylinder 110.

The shaft portion 140 and the cylindrical portion 150 have a structure in which the outer peripheral surface and the inner peripheral surface are entirely slid, and a lubricant such as grease is applied to these sliding surfaces. . By doing so, a lubricant film is formed on the sliding surface, so that the outer peripheral surface of the shaft portion 140 and the inner peripheral surface of the cylindrical portion 150 come into direct contact, ie, solid contact. The area is reduced, and the slidability can be improved.

Since the shaft portion 140 and the cylindrical portion 150 are required to have rigidity and corrosion resistance, usually, stainless steel or carbon steel whose surface is plated or coated is used. By the way, in the divided plate cylinder 100, it is necessary to control the ink layer to a thickness of a micron unit in order to secure print quality. For this reason, on the outer peripheral surface of the shaft portion 140 and the inner peripheral surface of the cylindrical portion 150, the cylindrical portion 150 is prevented from moving in the radial direction, that is, rattling in the radial direction. Precise processing controlled on a micron level is applied to prevent the occurrence of cracks.

However, when high-speed printing is desired, as in recent years, it is not enough to perform precision processing on the order of microns in order to ensure excellent print quality. It is necessary to tightly fit the shaft part 140 and the cylindrical part 150 so as not to cause the problem. When the shaft part 140 and the cylindrical part 150 are tightly fitted, the lubricant will not spread all over the sliding surface, and the cylindrical part 150 will smoothly and axially and circumferentially. May not be able to move.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the drawbacks of the above-described technology, and in order to ensure better printing quality, even if the shaft portion and the cylindrical portion are tightly fitted, the cylindrical portion It is an object of the present invention to provide a divided plate cylinder capable of smoothly moving a plate cylinder in an axial direction and a circumferential direction. Disclosure of the invention

In order to achieve the above object, a divided plate cylinder according to the present invention is a divided plate cylinder that is used for register adjustment in a printing press and includes a cylindrical portion including a plate cylinder surface and a shaft fitted into the cylindrical portion. The sliding surface is formed on a metal sprayed layer sprayed on an inner peripheral surface of the cylindrical portion and / or an outer peripheral surface of the shaft portion.

By doing so, a metal suitable for the sliding surface can be sprayed onto the cylindrical portion and the shaft portion to form a sliding surface with excellent slidability. You can move smoothly.

The metal may be molybdenum steel, chromium molybdenum steel, stainless steel, nickel steel, silicon bronze, phosphor bronze, white copper, nickel copper alloy, nickel chromium iron alloy, nickel molybdenum iron alloy, iron nickel chromium molybdenum alloy, or titanium. It is preferable to use the configuration used. As described above, when molybdenum steel, chromium molybdenum steel, or the like is used as the metal to be sprayed, wear resistance and load resistance can be improved.

In addition, it is preferable that a groove in which a lubricant is sealed is provided on the sliding surface. In this case, the lubricant can be stored in the groove on the sliding surface. The lubricant is supplied to the sliding surface, and the cylinder can move smoothly.

Further, the present invention is configured such that the groove is formed in a spiral shape. By doing so, the lubricant can be substantially evenly accumulated on the entire sliding surface, so that the lubricant is supplied evenly to the sliding surface, and the cylindrical portion can be moved more smoothly.

Further, the present invention is configured such that the sliding surface is partially formed. In this case, the outer peripheral surface of the shaft portion and the inner peripheral surface of the cylindrical portion slide partially, so that the frictional resistance is reduced, and the cylindrical portion of the divided plate cylinder can move more smoothly.

This sliding surface can be provided at a plurality of locations. In this case, for example, the cylindrical portion can be supported at two points or at three points, so that the cylindrical portion can be firmly and efficiently supported.

Since the shaft and the cylinder move only a few mm relatively in the axial and circumferential directions, the effect of fluid lubrication in the sliding bearing cannot be expected. From such a viewpoint, the above-mentioned configuration is adopted in order to provide the sliding surface between the shaft portion and the cylindrical portion with wear resistance. Need to be '' Brief description of the drawings

FIG. 1 is a schematic side view for explaining the structure of a divided plate cylinder according to the first embodiment of the present invention.

FIG. 2 is a schematic enlarged view for explaining a sliding surface of a divided plate cylinder according to the first embodiment of the present invention, wherein (a) is a cross-sectional view of a base portion, and (b) is a shaft end portion. 1 shows a cross-sectional view of.

FIG. 3 is a schematic side view for explaining the structure of a divided plate cylinder according to the second embodiment of the present invention.

FIG. 4 is a schematic side view for explaining the structure of a divided plate cylinder according to the third embodiment of the present invention.

FIG. 5 is a schematic side view for explaining the structure of a divided plate cylinder of a conventional rotary press. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[First embodiment]

As shown in FIG. 1, the divided plate cylinder 1 of the present embodiment differs from the above-described conventional example in that the molybdenum steel is sprayed on the outer peripheral surfaces of the base 41 and the shaft end 42 of the shaft 40 to form a sprayed layer. 60, and a sliding surface is formed on the sprayed layer 60.

Specifically, the shaft portion 40 is formed by thinning the outer diameters of the base portion 41 and the shaft end portion 42 by the thickness of the sprayed layer 60, and the molybdenum steel ( : !!!!: Standard: 丫 G TM) is sprayed to form a sprayed layer 60. Then, the sprayed layer 60 is polished to a predetermined fitting dimension.

In this embodiment, as described above, the molybdenum steel is thermally sprayed and subjected to heat treatment or machining to form a sliding surface composed of the sprayed layer '60. It is not limited.

For example, instead of molybdenum steel, chromium molybdenum steel, stainless steel, nickel steel, silicon bronze, phosphor bronze, white copper, nickel copper alloy, nickel grom iron alloy, Nickel-molybdenum iron alloy, iron-nickel-chromium-molybdenum alloy, or titanium may be used, and can be selected in consideration of required rigidity, corrosion resistance, load resistance and the like.

In the shaft portion 40, a lubricant such as grease is applied to the sprayed layer 60, and subsequently, the shaft portion 40 is inserted into the cylindrical portion 50. As shown in FIG. 2, a lubricant film is formed between the outer peripheral surface of the thermal sprayed layer 60 of the base 41 and the inner peripheral surface of the plate body 51. A lubricant film is formed between the outer peripheral surface of the thermal spray layer 60 of the part 42 and the inner peripheral surface of the plate body part 51. In the same figure, the outer peripheral surface of the sprayed layer 60 of the base 41 and the inner peripheral surface of the plate body 51, and the outer peripheral surface of the sprayed layer 60 of the shaft end 42 and the inner periphery of the plate body 51 are shown. Although the surfaces are not shown to be in solid contact with each other, the projections (not shown) are always in solid contact at any point, and the cylindrical portion 50 is in contact with the shaft portion 40. There is a structure that does not rattle.

This lubrication state is a boundary lubrication level in which solid contact is made partially, and the outer peripheral surface of the shaft portion 40 and the inner peripheral surface of the cylindrical portion 50 are partially in solid contact. The sliding surface of the layer 60 is designed so that it does not seize or wear even in solid contact.

Furthermore, if the fitting is tight in order to reduce the backlash of the cylindrical portion 50 with respect to the shaft portion 40, the ratio of solid contact increases and a dry lubrication state is obtained. Even in solid contact in such a state, the sliding surface of the sprayed layer 60 is hardly seized or worn.

Other configurations of the divided plate cylinder of the present embodiment are the same as those of the divided plate cylinder of the conventional example.

As described above, the divided plate cylinder 1 of the present embodiment forms a sprayed layer 60 by spraying molybdenum steel on the peripheral surface of the base portion 41 of the shaft portion 40 and the shaft end portion 42. By forming the sliding surface on 0, wear resistance and load resistance can be improved, and the cylindrical portion 50 can be smoothly moved in the axial direction and the circumferential direction.

In the present embodiment, the sprayed layer 60 is formed on the outer peripheral surface of the shaft portion 40. However, the present invention is not limited to this configuration. For example, the sprayed layer 60 is formed on the inner peripheral surface of the cylindrical portion 50. Alternatively, a sprayed layer of the same or different metal may be formed on both the outer peripheral surface of the shaft portion 40 and the inner peripheral surface of the cylindrical portion 50, and a sliding surface may be formed on these sprayed layers. [Second embodiment]

As shown in the figure, the divided plate cylinder 1a of the present embodiment is different from the above-described first embodiment in that the base 43 of the shaft portion 40 and the shaft end portion 42 have grooves 43, spirally. The configuration is provided with 44.

Specifically, the divided plate cylinder 1a of the present embodiment has a groove 4 in which a lubricant is sealed in a sliding surface of a sprayed layer 60 sprayed on the outer peripheral surfaces of the base 41 and the shaft end 42. 3, 4 4 are provided. Each of the grooves 43 and 44 is added in a spirally wound state, and each of the grooves 43 and 44 has a substantially rectangular cross section. The number of turns and the cross-sectional shape of the grooves 43 and 44 are not limited to the above-described configuration. For example, the number of turns may be increased, or the cross-sectional shape may be V-shaped or semicircular.

Other configurations of the divided plate cylinder of the present embodiment are the same as those of the divided plate cylinder of the first embodiment.

As described above, the divided plate cylinder 1a of the present embodiment forms the lubricant grooves 43 and 44 so that the lubricant can be accumulated on the driving surface and the accumulated lubricant can be transferred to the sliding surface. Therefore, the possibility of occurrence of solid contact due to running out of lubricant can be reduced.

In the present embodiment, the groove is formed on the outer peripheral surface of the shaft portion 40. However, the present invention is not limited to this configuration. For example, a groove may be formed on the inner peripheral surface of the cylindrical portion 50. Alternatively, grooves may be formed on both the outer peripheral surface of the shaft portion 40 and the inner peripheral surface of the cylindrical portion 50.

[Third embodiment]

As shown in the drawing, the divided plate cylinder 1b of the present embodiment is different from the first embodiment in that the sliding surface is partially formed instead of using the entire outer peripheral surface of the shaft portion 40 as the sliding surface. And three sliding surfaces are formed so as to support the cylindrical portion 50 at three points in the axial direction.

More specifically, the divided plate cylinder 1 b of the present embodiment is Thermal sprayed layers 6 1 and 6 2 are formed on the outer peripheral surface of the shaft. Further, a thermal sprayed layer 6 3 is formed on the outer peripheral surface of the operating end of the shaft end 4 2. Sliding surfaces are formed on 62 and 63, and these sliding surfaces slide on the inner peripheral surface of the cylindrical portion 50. In other words, the shaft portion 40 has the outer peripheral surfaces other than the sliding surfaces of the sprayed layers 61, 62, and 63 processed to be thinner than those sliding surfaces, and the sprayed layers 61, 62, 63 Only the sliding surface of slides with the inner peripheral surface of the cylindrical portion 50.

In this way, the sliding surfaces of the sprayed layers 61, 62, 63 of the shaft portion 40 and the inner peripheral surface of the cylindrical portion 50 slide at three locations in the axial direction. As a result, the friction resistance becomes smaller, and the cylindrical portion 50 can move more smoothly.

Further, since the cylindrical portion 50 is supported at three points with respect to the shaft portion 40, it is firmly and efficiently supported.

As described above, the divided plate cylinder 1b of the present embodiment forms the sliding surfaces composed of the sprayed layers 61, 62, and 63 at three positions of the shaft portion 40, and supports the cylindrical portion 50 at three points. By doing so, the cylindrical portion 50 can be moved more smoothly.

Further, in the present embodiment, the sliding surfaces are formed by spraying the thermal sprayed layers 61, 62, and 63 at three positions of the shaft portion 40. However, the present invention is not limited to this structure. May be formed at a plurality of locations.For example, the sprayed layers 61 and 63 may be formed on the outer peripheral surface of the drive side end of the base 41 and the outer peripheral surface of the operation side end of the shaft end 42. Good. As described above, even when the cylindrical portion 50 is supported at two points, it can be smoothly moved.

Here, “partially forms a sliding surface” means that a sliding surface is partially formed in the circumferential direction and in the Z or axial direction. Therefore, for example, the sliding surface may be formed only on the outer peripheral surface of the central portion of the base portion 41, and the frictional resistance is smaller than that of the entire outer peripheral surface of the shaft portion 50 sliding. 0 can move more smoothly.

Although not shown, a groove may be provided in the sliding surfaces of the sprayed layers 61, 62, and 63 so that the lubricant may be sealed therein. The supplied cylindrical part 50 can be moved more smoothly. Further, instead of providing the groove and filling the lubricant into the groove, the lubricant may be filled in the gaps between the sprayed layers 6 1, 6 2 and 6 3. By doing so, the lubricant can be supplied to the sliding surface without providing a groove, and the cylindrical portion 50 can be moved smoothly.

As described above, the divided plate cylinder according to the present invention has been described with reference to the preferred embodiments. However, the divided plate cylinder according to the present invention is not limited to only the above-described embodiment, and may be variously modified within the scope of the present invention. It goes without saying that changes can be made.

For example, since the cylindrical portion moves only a few mm in the axial direction and the Z direction or the circumferential direction with respect to the shaft portion, it is not necessary to form a sprayed layer so as to go around the outer peripheral surface of the shaft portion. Although not shown, a strip-shaped thermal spray layer extending in the axial direction may be formed at six equally-divided positions in the circumferential direction, and a sliding surface may be formed on these thermal spray layers.

As described above, according to the divided plate cylinder of the present invention, a metal suitable for sliding is sprayed on the cylindrical portion and the Z or shaft portion, and a sliding surface is formed on the sprayed layer, thereby forming a cylinder. The movement of the part in the axial direction (lateral direction) and the circumferential direction (vertical direction) can be smoothed. As a result, the cylindrical portion can move smoothly even if the shaft portion and the cylindrical portion are tightly fitted so that the cylindrical portion does not rattle, so that more excellent print quality can be secured. it can. Industrial applications

As described above, the divided plate cylinder according to the present invention is suitable for use as a plate cylinder in a newspaper printing press.

Claims

The scope of the claims

1. A divided plate cylinder having a cylindrical portion including a plate cylinder surface and a shaft fitted into the cylindrical portion, which is used for register adjustment in a printing press,

A divided plate cylinder, wherein a sliding surface is formed on a metal sprayed layer sprayed on an inner peripheral surface of the cylindrical portion and / or an outer peripheral surface of the shaft portion.

2. The metal is molybdenum steel, chromium molybdenum steel, stainless steel, nickel steel, silicon bronze, phosphor bronze, white copper, nickel copper alloy, nickel chrome iron alloy, nickel molybdenum iron alloy, iron nickel chromium molybdenum alloy, or The split plate cylinder according to claim 1, wherein the split plate cylinder is made of titanium.

3. The divided plate cylinder according to claim 1, wherein a groove is formed in the sliding surface to seal a lubricant.

4. The divided plate cylinder according to claim 3, wherein the groove is formed in a spiral shape.

5. The divided plate cylinder according to any one of claims 1 to 4, wherein the sliding surface is partially formed.

6. The divided plate cylinder according to claim 5, wherein the sliding surface is provided at a plurality of positions.