JPH0411813Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to upper and lower rollers of a paper feed system of a rotary copying machine.

(Prior Art) In a rotary mimeograph press, when the printing paper is transferred one sheet at a time to the upper and lower rollers by a feed roller and is fed directly to the plate cylinder, the upper and lower rollers and plate cylinders that are in contact with each other and the press A load is applied to the printing paper at each location of the roller, and this load on the printing paper may damage the thin plate-making base paper wound around the plate cylinder. Therefore, the printing paper is blocked by the upper and lower rollers to form a buckle (curve), and the printing paper sandwiched between the upper and lower rollers is fed in synchronization with the rotation timing of the plate cylinder, and the upper and lower rollers come into contact with each other. is released, and the repulsive force generated by the buckle gives momentum to paper feeding.

In such conventional upper and lower roller mechanisms, one of the upper and lower rollers that are in contact is formed to be movable in the vertical direction relative to the other, and force is applied to both ends of this one roller to bring the upper and lower rollers into contact. I'm trying to move in the direction of releasing it.

(Problem that the invention attempts to solve) However, in such conventional upper and lower roller mechanisms, one roller is formed to be movable relative to the other roller, and force is applied to both ends of this movable roller to bring them into contact. In order to move in the direction of releasing the
Paper feed control means for moving each end must be provided separately, which results in a large number of parts, a complex mechanism, and difficulty in constructing the mechanism compactly.

The present invention was devised to solve the above-mentioned problems, and the purpose of the present invention is to reduce the number of parts to create a simple structure and to create a compact structure that does not take up much space. .

(Means for solving the problem) In order to solve the above problem, the present invention transports the printing paper 2 by the feed roller 3 to the upper and lower rollers 6 and 7 which are in contact with each other, and then transfers the printing paper 2 to the plate cylinder 9. drive shaft 13
The upper and lower rollers 6 and 7 are released from contact by the paper feed control means 31 connected to the printing paper 2.
In the rotary mimeograph machine, one of the upper and lower rollers 6 and 7 is pivotally connected to the case 17 of the rotary mimeograph machine at both ends of the one roller, and the upper and lower rollers One end of the other roller 6, 7 is pivotally connected to the case, and the other end is biased 8 in a direction in which the upper and lower rollers 6, 7 are brought into contact with each other, so that the other end is movable in the vertical direction. , the other roller 6 is controlled by the paper feed control means 31.
The printing paper 2 can be fed to the plate cylinder 9 by moving the other end in a direction in which the biasing force 8 is released.

(Function) According to the above means, the printing paper held between the upper and lower rollers 6 and 7 is fed in synchronization with the rotation timing of the plate cylinder 9, and the paper feed connected to the drive shaft 13 of the plate cylinder 9 is fed. The one end 6a of the movable roller 6 is moved by the control means in the direction of releasing the contact between the upper and lower rollers 6 and 7, and the gap between the upper and lower rollers 6 and 7 is opened.
It is blocked by the upper and lower rollers 6 and 7 that are in contact with each other,
The printing paper 2 that has formed a buckle is given momentum to feed by the repulsive force caused by the buckle.

(Embodiment) Next, a preferred embodiment of the present invention will be described based on the attached drawings.

FIG. 1 is a diagram schematically showing a paper feeding system and a plate cylinder. Printing paper 2 on a paper feeding tray 1 is moved one by one to guide members 4 and 5 by the rotation of a feed roller 3 and an elevator (not shown). It is guided and sent to upper and lower rollers 6 and 7. The upper and lower rollers 6 and 7 consist of a lower roller 7 whose both ends are pivotally mounted to the case of the rotary copying machine, and an upper roller 6 disposed above the lower roller, and one end of each of the upper and lower rollers 6 and 7. A spring 8 is engaged between 6a and 7a, and urges the upper and lower rollers 6 and 7 to come into contact with each other to block the printing paper that is being fed, and causes the blocked printing paper to buckle (curve). Form.
Reference numeral 9 indicates a plate cylinder, and the plate cylinder 9 is rotated by the rotational force of a motor (not shown) being transmitted to a drive shaft 13 via a shaft 10, a belt 11, a pulley 12, and the like. A printing plate base paper is wrapped around the outer periphery of the printing cylinder 9. The printing paper blocked by the upper and lower rollers 6 and 7 is then fed by the upper and lower rollers 6 and 7 at a predetermined phase difference with respect to the rotation of the plate cylinder 9, and the upper roller 6 lifts the paper upward. When the buckle is pushed, the buckle is guided by the guide members 14 and 15, and the repulsive force of the buckle gives momentum to the paper feed. At the same time, the press roller 16 disposed below the plate cylinder 9 is rotated upward and comes into contact with the plate cylinder 9, and the printing paper sandwiched between the plate cylinder 9 and the press roller 16 is superimposed on the base paper for plate making. Printing is performed by rotating the plate cylinder 9.

Next, based on FIGS. 2 to 4, the upper and lower rollers 6,
7 will be explained in detail. As described above, the upper roller 6 has one end 6a urged toward the lower roller 7 by the spring 8 so as to be movable in the vertical direction, and the other end 6b is pivotally connected to the case 17 of the rotary copying machine. A support wall 18 is provided upright on the side of the upper roller 6 on which the spring 8 is engaged, and a channel-shaped lever 19 is provided parallel to this support wall 18. The lever 19 has two ears 20, 21 forming a channel and a bottom piece 22 connecting the ears 20, 21, and the bottom piece 22 has two elongated holes 2 spaced apart in the vertical direction.
3 and 24 are drilled. Screws 25 and 26 are inserted into both elongated holes 23 and 24, respectively, and the lever 19
is attached to the support wall 19 so as to be slidable in the vertical direction. A pin 27 is erected between the two long holes 23 and 24 of the bottom piece 22, and the upper part 27a of the pin 27 protrudes beyond the left and right ear pieces 20 and 21. The left and right ear pieces 20, 21 are bored in the direction of deepening the channel below the pin 27, and extend downward to form extensions 28, 29.
9 with the upper roller 6 in between, both extending portion ends 28
a and 29a are connected with a screw 30.

Reference numeral 31 indicates a paper feed control means such as a paper feed control cam, and the paper feed control cam 31 has an elongated plate shape with a wide middle portion 31a and both end portions 31b and 31c.
is formed into a substantially tapered shape. and middle part 3
The paper feed control cam 31 is pivotally attached to the support wall 18 by inserting a screw 33 or the like into a hole 32 made in the hole 1a.
It is arranged substantially perpendicular to the lever 19. One end 31b of the paper feed control cam 31 is located below the pin 27, and the other end 31c is connected to the drive shaft 13 of the plate cylinder 9, so that the paper feed control cam 31 rotates with a predetermined phase difference with respect to the rotation of the plate cylinder 9. It is formed.

In this embodiment, the upper roller 6 is rotated, but the lower roller 7 may also be configured to rotate.

Next, the operation of the upper and lower rollers 6 and 7 of the present invention will be explained.

When the drive shaft 13 of the plate cylinder 9 rotates, the printing paper 2 held between the upper and lower rollers 6 and 7 is fed with a predetermined phase difference, and the end 3 of the paper feed control cam 31 is fed.
1c rotates, and the end 31b rotates around the screw 33.
also rotates in the direction of arrow A in the figure. By rotating the end portion 31b in the direction of arrow A, the pin 27 is pushed upward, and the lever 19 is also pushed upward. This lever 19 pushes up the upper roller 6 in the direction opposite to the biasing direction of the spring 8, and the upper and lower rollers 6, 7 are released from contact and spaced apart. When the upper and lower rollers 6 and 7 open, the printing paper 2 that was sent by the feed roller 3 and was blocked by the upper and lower rollers 6 and 7, forming a buckle (curve), is moved by the repulsive force of the buckle. As a result, momentum is given to the paper feeding, the paper is guided by guide members 14 and 15 and fed to the plate cylinder 9, and is superimposed on the plate-making base paper wound around the plate cylinder 9.

(Effects of the invention) As detailed above, according to the invention, of the upper and lower rollers that are in contact with each other, only one end of the upper roller is lifted upward to control the feeding of printing paper to the plate cylinder. As a result, the number of parts can be reduced and the configuration can be simplified. Furthermore, since only one end of the upper roller is lifted, a compact structure that does not take up much space can be achieved.

[Brief explanation of the drawing]

The drawings show preferred embodiments of the present invention.
The figure is a perspective view schematically showing the paper feeding system and plate cylinder, Figure 2 is a cross-sectional view taken from the two directions of the arrow in Figure 1, and Figure 3 is a cross-sectional view of the paper feed system and plate cylinder.
FIG. 4 is a sectional view taken from the direction of arrow 3 in FIG. 3, and FIG. 4 is a sectional view taken from direction 4 of arrow 3 in FIG. In the drawings, 2 is a printing paper, 6 is an upper roller, 6a and 6b are both ends of the upper roller, 7 is a lower roller, 8 is a spring, 9 is a plate cylinder, 17 is a case, and 31 is a paper feed control cam. .

Claims (1)

[Claims for Utility Model Registration] The printing paper is transported by a feed roller to the upper and lower rollers that are in contact with each other, and the upper and lower rollers are brought into contact with each other by a paper feed control means connected to the drive shaft of the plate cylinder. In a rotary copying machine in which the connection is released and the printing paper is fed to the plate cylinder, one of the upper and lower rollers is pivotally connected to the case of the rotary copying machine at both ends of the one roller, and the upper and lower rollers are one end of the other roller is pivotally connected to the case, and the other end is biased in a direction in which the upper and lower rollers come into contact with each other, so that the other end is movable in the vertical direction, and the paper feeding control is performed. A paper feeding system for a rotary copying machine, characterized in that the other end of the other roller is moved in a direction in which the bias is released by means of a means so that the printing paper can be fed to the plate cylinder. Upper and lower roller mechanism.