JPH036593Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an angle adjustment device for a paper feed suction foot in a sheet-fed printing press.

Generally, the paper feed section of the above-mentioned printing machine uses a cam means and a link means to move the paper between the front end of the paper placed on the paper feed table and the feed and press rollers disposed in front of it. A suction foot is arranged to reciprocate on a movement trajectory, and when the suction foot reaches the front end of the paper, a rotary valve is opened and vacuum pressure is supplied by a vacuum pump, so that the suction foot attracts a sheet of paper. The paper is raised a desired distance, separated from the paper below, and the adsorbed paper is sent between a feed roller and a presser roller, at which point a rotary valve closes and the paper is released from the suction foot.

However, as shown in Fig. 1, the conventional paper feed suction foot a is configured so that it is always held at a constant angle (perpendicular to the paper surface) at the paper suction position. If the paper b is in a horizontal state as shown in the figure, it can be adsorbed, but if it is a so-called curled paper b' whose front end is curved upward as shown in FIG. 2, it cannot be adsorbed.

Therefore, in the past, if the paper was not horizontal, such as the curled paper b' or corrugated paper, it had to be corrected. In addition, when placing paper in a horizontal state on the mounting table, the paper on the upper side tends to curl, which often occurs especially during the dry season, so correcting this each time is not only troublesome but also time consuming. This results in a decrease in printing efficiency.

The present invention solves the above-mentioned conventional drawbacks and provides a paper feed suction foot angle adjustment device that allows not only horizontal paper but also curled paper to be effectively fed without correction by one-touch operation of the operating lever. The purpose is to try.

The present invention will be described in detail below based on illustrated embodiments.

FIG. 3 is a side view schematically showing the entire sheet-fed printing press equipped with the paper feed suction foot angle adjustment device A of the present invention. It is formed by 4. 5 is the frame of this machine, 6 is a paper feed conveyor, a feed roller 7, a presser roller 8, and a plurality of rollers 9, 9'.
...and is formed by a conveyor belt 10.
Reference numeral 11 denotes a paper feeding section provided at the front of the paper feeding conveyor 6, which is connected to a paper loading table 12 and a vacuum pump (not shown), and is located above the front end of the paper 29.
It is formed of a suction foot 25, etc., which is operated by driving means such as a cam and a link (not shown) to perform a predetermined reciprocating movement of paper feeding. Reference numeral 15 denotes a paper discharge section, which is formed by a plurality of chain sprockets 16 and a chain delivery device 17. 18
indicates the paper output tray.

Here, since the sheet-fed printing press performs printing with the same configuration and operation as conventional machines, a description thereof will be omitted.

As shown in FIGS. 3 to 5, the paper feed suction foot angle adjusting device A of the present invention is constructed by attaching an arm 19 attached to a control lever 20 to a frame 21.
The arm 1 is pivotally supported by a stud shaft 22 so as to be rotatable at a desired angle using the stud shaft 22 as a fulcrum.
9, a holder 23 is rotatably supported by a shaft 24, and the holder 23 and a holder 27 fixed to a shaft 26 of a suction foot 25 are connected by a connecting shaft 28, and one end 28a of the coaxial shaft 28 is connected to the holder 23. The other end 28b is formed into a threaded portion 28c, and the tightening nut 28 is inserted into the threaded hole 27a of the holder 27 so as to be slidable in the axial direction.
The operation lever 2 is interlocked by being screwed so as to be movable and adjustable in the axial direction through the lever c, and a spring force is applied in the axial direction of the connecting shaft 28.
0, the arm 19 is rotated about the stud shaft 22, and the holder 23, the connecting shaft 28,
By rotating the shaft 26 in the circumferential direction via the holder 27, the suction foot 25 can be moved to point c shown by the solid line in FIG.
It is configured so that it can be switched and adjusted in two stages.

That is, the suction foot 25 is operated by the known cam means and link means (not shown), so that the suction foot 25 is moved as shown by the arrow e in FIG.
The rotary valve (not shown) opens at the point e shown in the figure, vacuum pressure is supplied to the suction foot 25 by the vacuum pump, and the sheet of paper 29 is This is because the structure is such that the paper 29 is adsorbed, moves from point e to point e' in this state, closes the rotary valve, releases the suction from the suction foot 25, and sends the paper 29 to the paper feed conveyor 6 mentioned above. , the present device A switches the suction port 25a of the suction foot 25 at the point e position where the paper 29 is sucked, to the point c position in the case of horizontal paper, and to the point d position in the case of the curled paper 29' shown in the figure. It is configured to be parallel to the paper surface so that not only horizontal paper but also curly paper can be suction fed.

Here, since the suction foot 25 is reciprocated along the above-mentioned locus of movement, one end 28 of the connecting shaft 28 is attached so as not to interfere with this movement.
a is provided in the hole 23a of the holder 23 with a metal 30 interposed therebetween so as to slide smoothly in the axial direction, and a spring force is applied in the axial direction of the connecting shaft 28 to assist the reciprocating movement of the suction foot. The spring 32 may be a compression spring mounted on the connecting shaft 28 with its ends supported by the holder 23 and the spring receiver 31 of the connecting shaft 28, respectively, as shown in the illustrated example, or it may be a compression spring (not shown). However, a tension spring may be tensioned between the spring receiver 31 and the holder 27.

Further, the frame 21 has the operation lever 20.
Two stoppers 33 and 34 are provided at desired angles and can be releasably engaged and held in two positions. The above stopper 3 shown in the diagram
3 and 34, one ends of two leaf springs 35 and 36 are arranged upright and in parallel and fixed to the frame 21, each end of which is bent into a substantially circular cross section, and the operating lever 20 is sandwiched between the ends. Although the stopper is formed to be able to be attached and held, the stopper is not limited to this, and other known stoppers of any structure can be used.

The springs 32 are distributed vertically in FIG. 4 about a straight line f connecting the centers of the shaft 26 and the stud shaft 22, and
The spring force is applied uniformly no matter which position 9 is rotated by the operating lever 20 as shown by the solid line and the two-dot broken line in FIG.

In the above configuration, in the case of horizontal paper, if the operation lever 20 is switched to point c' in FIG. 4 and held by the stopper 33, the suction foot 25 is moved to point c shown by the solid line in the figure. At this point, the suction port 25a becomes parallel to the plane of the paper, and at the point e of the movement trajectory e←→e', a sheet of paper 29
is attracted, and the attraction of the paper 29 is released at point e'.

In the case of curled paper 29' where the front end of the paper is curved upward as shown in the example shown, when the operating lever 20 is switched from point c' to point d' and held at that position by the stopper 34, the arm 19 is rotated counterclockwise about the stud shaft 22, so the holder 23 and the connecting shaft 28 are displaced downward as shown by the two-dot broken line, and as a result, the holder 2
7, the shaft 26 is rotated clockwise in the figure, and the suction foot 25 is tilted forward and upward from point c and switched to point d, and the suction foot 25 is rotated clockwise in the figure.
5a becomes substantially parallel to the curled paper 29', thereby making it possible to attract the curled paper 29'.

As explained above, according to the angle adjusting device for the paper feed suction foot in a sheet-fed printing press according to the present invention, the arm 19, which is rotatably attached to the frame 21 about the stud shaft 22, is rotated by the operation lever 20. Seshime, holder 23,
27, suction foot shaft 2 via connecting shaft 28
6, the suction foot 25 is placed in the paper suction position, and the angle can be adjusted in two stages so that the suction port 25a is parallel to the paper surface, so that the paper can be fed horizontally. Of course, in the case of curled paper 29', by switching and adjusting the suction foot 25 to an angle corresponding to the curved surface of the paper using the operating lever 20, paper can be fed without straightening the curled paper 29'. The angle of the suction foot 25 for horizontal paper and curled paper can be adjusted using the operating lever 20.
This can be done extremely easily with one-touch operation, so after implementing the proposed device,
Since the troublesome work of straightening curled paper can be omitted, the work time can be shortened accordingly, and paper feeding can be made possible, thereby contributing to improving the efficiency of printing work.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing conventional paper feed suction feet, respectively, and FIG. 3 is a schematic side view of a printing press equipped with a paper feed suction foot angle adjustment device in a sheet-fed printing press according to the present invention. 4 are front views showing the same angle adjusting device, and FIG. 5 is a developed side view showing the same angle adjusting device. 19...Arm, 20...Operation lever, 21...
...Frame, 22...Stud shaft, 23, 27...
...Holder, 25...Suction foot, 26...
...Shaft, 28...Connection shaft, 32...Spring.

Claims (1)

[Scope of utility model registration request] An arm 19 to which an operating lever 20 is attached is pivotally supported on a frame 21 so that the arm 19 can be rotated by the operating lever to a desired angle about a stud shaft 22 as a fulcrum,
A holder 23 rotatably attached to the arm
and a holder 27 attached to the shaft 26 of the suction foot 25 are interlocked by a connecting shaft 28, with at least one end of the coaxial being slidably inserted into the holder in the axial direction, and the arm is attached to the connecting shaft up and down. A device for adjusting the angle of a paper feed suction foot in a sheet-fed printing press, characterized in that a spring 32 is attached to distribute the paper in different directions.