JPH0314364Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention is a lateral registration device that serves as a reference for positioning paper in the lateral direction perpendicular to the feeding direction of printing paper in a sheet-fed printing press. Concerning the composition of the guess.

(Prior art) Conventional sheet-fed printing presses use a side support for the registration device that uses hardened steel with a chiseled surface on the side surface that contacts the printing paper, or uses tungsten or other materials on the side surface of the side support. A type with cemented carbide chips embedded and fixed (Utility Model Publication No. 5304, 1983) is used.

(Problem to be solved by the invention) The horizontal alignment of the registration device in a sheet-fed printing press is
The frequency of contact and separation from the paper is extremely high, and the impact force when the edge of the paper is driven by the upper and lower rollers of the registration device and collides with the side of the side support, and the impact force during the subsequent paper feeding. It is frequently subjected to frictional force between the side of the side support and the edge of the paper.

For this reason, in the conventional horizontal support using hardened steel with a chisel-like sharpening on the side surface that the printing paper comes into contact with,
A disadvantage is that noticeable wear grooves occur on the sides of the side support, and if the depth of these grooves exceeds the allowable limit, paper position regulation becomes defective, forcing the side support to be replaced with a new one in a short period of time. It was hot.

In addition, even if cemented carbide chips are embedded and fixed in the side of the side support, which has come to be used to compensate for the above-mentioned drawbacks, it reduces the occurrence of wear grooves and slightly extends the life of the side support. I was able to do that, but
In sheet-fed printing presses, where printing speeds have been increasing recently, there has been a strong demand for a long-life horizontal support with less wear and sliding friction.

Furthermore, if a material with high hardness is used as the material for the side support, the paper may be cut at the corners of the side support that are perpendicular to the paper feeding direction, or the paper may become misaligned due to poor compatibility with the paper. There are drawbacks.

The present invention has been made with the aim of improving these drawbacks and providing a horizontal support for a registration device that has excellent wear resistance, low sliding friction, long life, and no paper breakage or misregistration.

(Means for Solving the Problems) Under the above-mentioned object, the present invention makes the paper contact side 3 of the base 2 protrude from the surface of the base 2 in the side support of the registration device of a sheet-fed printing press, and A base metal 7 made of cemented carbide is attached to the recessed part 4 formed by leaving at least the front and rear portions of the paper contact side surface 3 in the paper feeding direction.
A thin layer plate 5 consisting of a superabrasive layer 6 formed by sintering on the top surface is embedded and fixed with the superabrasive layer 6 exposed to the outer surface, and the surface of the superabrasive layer 6 is covered with paper. A configuration in which the surface of the side surface 3 is flush with the remaining front and rear portions is presented as a means of solving the problem.

(Example) The details of the present invention will be specifically explained below with reference to the drawings.

In the registration device of the sheet-fed printing press shown in FIG.
and arrive at the first printing station.
When the paper 11 comes to a fixed position in the paper feeding direction perpendicular to the plane shown in the figure between the outer peripheral surfaces of the lower roller 8 and the upper roller 9 of the registration device provided in the station, the paper 11 is rotated at a constant high speed in advance. The lower roller 8, which had been lowered to the lower position, is instantly lifted together with its supporting base (not shown), and the outer circumferential surface of the lower roller 8 presses against the outer circumferential surface of the upper roller 9 with the paper 11 in between. become. At this time, since the outer circumferential surface of the lower roller 8 is rotating at high speed, a strong frictional force is generated between the paper 11 and the lower roller 8, causing the outer circumferential surface of the upper roller 9 to rotate in the same direction and rotate the paper 11. thin plate 1
0, the paper 11 is rapidly driven in the direction of rotation of the outer circumferential surface so that the end 12 of the paper 11 abuts against the paper abutting side surface 3 of the base body 2 of the side abutment 1 of the registration device.

Since the mechanism (not shown) is such that the lower roller 8 is lowered to a lower position together with its supporting base at the same time that the end 12 of the paper 11 hits the paper abutting side 3, the frictional force against the paper 11 is eliminated. The paper 11 is stopped at that position, and the paper can be positioned in the lateral direction perpendicular to the paper feeding direction.

To explain the details of the embodiment of the side support 1 shown in FIGS. 2 to 5, the paper contact side 3 of the base 2 of the side support 1 is formed to protrude from the other part of the surface of the base 2, and the paper A recessed notch 4 is provided leaving the front and rear portions of the abutment side surface 3 in the paper feeding direction.

A thin layer plate 5 is embedded and fixed in this concave notch 4, and the thin layer plate 5 consists of a base metal 7 made of cemented carbide and a so-called ultra-thin plate made of diamond or cubic boron nitride on the base metal 7. A large number of fine abrasive grains are subjected to ultra-high pressure (tens of thousands of atmospheres).
It consists of a superabrasive layer 6 of a polycrystalline sintered body of superabrasive grains recrystallized by adding an appropriate amount of catalyst metal (cobalt and others) at high temperature (1200°C to 1500°C). Then, so that the superabrasive grain layer 6 appears on the outer surface,
The base metal 7 embedded in the recessed notch 4 is fixed using brazing or welding metal, and the surface of the superabrasive layer 6 is flush with the surface of the front and rear portions of the side surface 3 in the paper feeding direction. It is configured so that

In the second embodiment shown in FIGS. 6 to 8, a plurality of thin laminate plates 5 made of super-abrasive polycrystalline sintered body are used, one recessed part 4 is provided, and each laminate plate is The cemented carbide 7 of the base metal is embedded in the concave notch 4 of the paper abutment side surface 3 so that the surfaces of the superabrasive grain layers 6 are in close contact with each other and are flush with the paper abutment side surface 3. It is fixed to 4.

In the third embodiment shown in FIGS. 9 to 11, a plurality of thin laminates 5 are used, a plurality of corresponding recessed notches 4 are provided, and these thin laminates 5 are attached to the paper-covering side surface 3. are embedded at intervals along the paper feeding direction, and the cemented carbide 7 of the base metal is inserted into the recessed part 4.
The surface of the superabrasive layer 6 is configured to be flush with the paper contacting side surface 3.

The fourth embodiment shown in FIGS. 12 to 14 is
A single long rectangular thin laminate plate 5 is embedded and fixed in a recessed part 4 formed in a strip shape parallel to the paper feed direction, leaving the front and rear and upper and lower parts of the paper abutment side surface 3 in the paper feed direction. The surface of the superabrasive grain layer 6 on the outer surface is configured to be on the same plane as the surface of the paper contacting side surface 3.

Further, in the fifth embodiment shown in FIGS. 15 to 17, a plurality of rectangular thin laminate plates 5 are closely attached to each other, leaving the front and rear and upper and lower portions of the paper contact side surface 3 in the paper feeding direction. It is embedded in and fixed to one recessed part 4 formed in a strip shape parallel to the surface, and is constructed so that the surface of the superabrasive grain layer 6 on the outer surface thereof is flush with the surface of the paper abutment side surface 3. be.

(Effect of the invention) The invention of the present application is constructed as described above, and the polycrystalline sintered body of superabrasive grains used therein has uniform hardness without directionality, and each diamond abrasive grain or cubic crystal grain has a uniform hardness. It is equivalent to the hardest value of boron nitride abrasive grains, and has better wear resistance and impact resistance than those abrasive grains.

Since the present invention uses the superabrasive grain layer on the side surface of the paper contact, the impact force generated when the end of the printing paper collides with the side surface of the paper contact, and the side surface of the paper contact during subsequent paper feeding. It has a very high resistance to friction between the paper and the edge of the paper. Therefore, even in recent sheet-fed printing machines where the paper repeatedly comes into contact with and leaves the horizontal support at extremely high speeds, it can sufficiently withstand wear and maintain its performance over a long period of time. . For example, the horizontal support of the registration device of the present invention has a lifespan 50 to 80 times longer than that of a conventional device made of hardened steel.

Furthermore, it is not easy to directly fix a superabrasive grain layer to a substrate such as ordinary steel, and requires advanced technology and cost. It is easy to fix the laminate to the substrate with the cemented carbide part.

Furthermore, in the present invention, the paper contact side surface 3 is made to protrude from the surface of the base body 2, and the thin laminate plate 5 is placed in the recessed part 4 formed by leaving at least both the front and back sides of the paper contact side surface 3 in the paper feeding direction. Since the surface of the abrasive grain layer 6 is fixed so as to be flush with the surface of the remaining front and rear portions of the paper abutment side surface 3, the front and rear ends of the side abutment that come into contact with the paper during paper feeding are normally flat. These are both edges of the paper abutment side surface 3 itself, which is made of a material that is not very hard, such as steel, and does not come into direct contact with the edge of the superabrasive layer, which has a high hardness. Therefore, once the device is actually used, within a short period of time, the edge of the side surface of the paper pad becomes very slightly rounded and blends in well with the paper, preventing the paper from being cut or misregistered. effect occurs.

From the above-mentioned effects, it is possible to increase the accuracy of regulating the position of the paper in the horizontal direction perpendicular to the paper feeding direction, improve the printing accuracy of the paper, and
As a result of the long life of the side support, it is possible to minimize the interruption of work for replacing a worn side support and the increase in the cost of replacement, resulting in a significant cost reduction.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram showing the operation of a registration device in a sheet-fed printing press, Figs. Figures 6 to 8 are the second embodiment, Figures 9 to 11 are the fourth embodiment, Figures 12 to 14 are the fourth embodiment, and the 15th embodiment.
Figures 1 to 17 show the fifth embodiment. 2nd, 6th, 9th,
Figures 12 and 15 are views viewed from above in the paper feeding direction (however, Figures 12 and 15 include some broken surfaces);
Figures 7, 10, 13, and 16 are views seen from a direction perpendicular to the paper feeding direction, Figure 4 is a view of the horizontal support in Figure 1 viewed from the paper feeding direction, and Figures 5, 8, 11, 14, and 1
FIG. 7 is a side view of the thin laminate. DESCRIPTION OF SYMBOLS 1... Side support, 2... Base, 3... Paper contact side, 4... Recessed part, 5... Thin layer plate, 6... Super abrasive grain layer, 7... Base metal, 8, 9... ...Lower roller and upper roller of registration device, 10...Thin plate for printing paper, 1
1...Printing paper, 12...Edge of printing paper.

Claims (1)

[Scope of utility model registration request] The paper abutment side surface 3 of the base body 2 is made to protrude from the surface of the base body 2, and a concave notch 4 is formed by leaving at least the front and back sides of the paper abutment side surface 3 in the paper feeding direction.
A thin layer plate 5 consisting of a cemented carbide base metal 7 and a superabrasive layer 6 sintered on the top surface is embedded and fixed with the superabrasive layer 6 exposed on the outer surface. A horizontal support for a registration device in a sheet-fed printing press, characterized in that the surface of the abrasive grain layer 6 is made to be flush with the surface of the remaining front and rear portions of the paper contact side surface 3.