JP2547652Y2 - Sucker device for sheet-fed printing press - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sucker for feeding a sheet loaded on a paper stacking plate on a paper stacker through a suction port to a feeder board in a sheet-fed printing press.

[0002]

2. Description of the Related Art A sheet feeding device of a sheet-fed printing press includes a sheet stack suspended from a sheet feeding frame by an elevating chain. , A paper stacking plate on which printing paper is loaded is mounted. Above the paper stack,
A sucker device having a plurality of suction ports is provided, and the paper on the paper stacking board is sucked one by one from the upper layer by the suction ports of the sucker device, and then the suction port moves forward to move forward. Conveyed. The conveyed paper is caught by upper and lower paper feed rollers and paper feed rollers, is sent out onto a feeder board by its rotation, is conveyed on the feeder board and on a difference plate, and then is fed to a paper feed unit by a swing device. Supplied.

[0003] In such a sheet feeding device, the above-mentioned suction port is generally provided with a first suction port which is arranged in a direction perpendicular to the paper feeding direction, and
A first suction port and a second suction port corresponding to the first suction port are provided in front of the second suction port, and the paper sucked by the first suction port is transferred to the second suction port. The apparatus is provided with, for example, only four first suction ports, and the paper sucked at the suction ports is directly fed to the paper feed roller by the advance of the suction ports.

[0004]

When the size of the paper is large, the suction port of the sucker device in this kind of paper feeding apparatus uses, for example, all four suction ports to suck the paper. When the paper size is small,
The paper is sucked using only the two suction ports located at the center. As a result, in the case of postcard printing or the like, the outer two suction holes are displaced outward from the width of the paper, and the air is sucked from the separated suction holes. There is a problem that will not be. However, if the air path of the outer suction port that is not used is cut off, this suction port will descend due to its structure.If you continue to feed paper in this state, half of the outer suction port will have the edge of the paper. In the case of paper having a size corresponding to the edge, there is a problem that the outer suction port comes into contact with the paper and the paper cannot be fed.

Accordingly, at present, the air path of the unused suction port is cut off, and at the same time, the unused suction port, which is fixedly fastened to the intake pipe, is loosened, so that the suction port is set at about 90% in the center of the intake pipe.
° Rotate to avoid interference with the paper at the time of descent, or secure it with tape so that the suction port does not drop, and close the suction port with tape to cut off the suction air intake. Not only requires a great deal of labor, but also has a problem that the preparation time is extended and the operating rate of the machine is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is possible to reliably suck the paper regardless of the size of the paper and to use a sucker for a sheet-fed printing machine that does not damage the loaded paper. It is intended to provide a device.

[0007]

According to the present invention, in order to achieve such an object, the paper is sucked in parallel in the width direction of the paper.
A plurality of suction ports having a lower end suction hole to be lifted and lowered
A holder for supporting freely, and a
Close the lower intake hole of the suction opening and hold the suction opening
Stopper that detachably locks when raised against
And provided.

[0008]

[Function] In the case of printing work of small size paper such as postcard printing, before starting the printing work, a stopper is attached to a suction port which is not used, or a stopper which is always attached is rotated or used. If the lower suction hole at the lower end of the suction port is not closed and the lowering of the suction port is restricted, the suction port that is not used does not suck the atmosphere, and the suction force of the other suction port is weakened because the suction port does not lower. The mouthpiece does not damage the paper.

[0009]

1 to 4 show an embodiment of a sucker device of a printing press according to the present invention. FIG. 1 is a front view of a suction port of the sucker device and the vicinity of a supporting device, and FIG. 2 is II-II of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. 1, and FIG. 4 is a side view taken along line IV of FIG. In the drawing, above the paper 1 loaded on a paper platform via a paper platform, the suction air of a sucker device 3 which is connected to a suction air source by a hose 2 and is driven up and down by a drive device (not shown). A pipe 4 is supported between the left and right frames,
A plurality of suction devices 5, in this embodiment, four suction devices 5, are fixed on the intake pipe 4 in parallel in the width direction of the paper 1.

The suction device 5 has a bracket 7 fixedly fastened to the intake pipe 4 with bolts 6, and a hole 7 a communicating with the hole 4 a of the intake pipe 4 opens to the side of the bracket 7. Has been drilled. Further, the suction device 5 includes a holder 8 having a vertical slide hole 8a, and a protruding tube portion 8b of the holder 8 is fitted into the hole 7a of the bracket 7 and fixed by screws 9. By doing so, the bore and the hole 7a of the slide hole 8 a protruding pipe portion 8b, 4
a and is communicated with the intake pipe 4.

A sleeve 10 with a flange is provided in the slide hole 8a.
A flanged cylindrical suction pipe 11 is vertically movably fitted to the flanged sleeve 10 and the slide hole 8a. ,
A plurality of communication holes 11a are formed. Then, the inner hole bottom portion of the suction tube 11 and suction port holder 12 is fitted, further to the lower conical hole 12a of the suction port holder 12, suction port 13 is integrally having a plurality of air intake holes 13a It is fitted to. Reference numeral 14 denotes a guide shaft fixed to the upper end of the holder 12 with a set screw 15, which is hung down in the slide hole 8a of the holder 8, and configured to guide the vertical movement of the suction tube 11.

In this way, when suction air is acting on the intake pipe 4, a cam mechanism (not shown) operates the intake pipe 4.
When There lower sucker holder 12 is lowered is seated on the upper end surface of the paper 1, the paper 1 by the intake of the air suction hole 13a of the suction port 13
As a result, a negative pressure is generated in the conical hole 12a whose open end is closed, so that the paper 1 is attracted to the open end of the conical hole 12a, and the suction pipe 11 is conical against the spring force of a spring member (not shown). When the paper 1 is sucked at the open end of the hole 12a, the slide hole 8a
It is configured to rise along. In the meantime, the intake pipe 4 is configured to move in the paper transport direction on the left side of FIG. 2 by a cam mechanism (not shown) and release the intake, thereby feeding the paper 1 onto the feeder board via the paper feed roller.

The present apparatus includes a member for closing the intake hole 13a of the unused outer one of the four suction openings 13 arranged in the width direction of the paper 1 and restricting the suction opening 13 from descending. A stopper 16 is provided.
That is, the stopper 16 is formed in a U-shape from an elastic thin plate material, and protruding pieces 16a are provided on both sides in the center in the height direction. In this way, when the width of the paper 1 is small, the stopper 16 is pressed into the holder 8 on the right side in FIG. Then, the holder 8 is sandwiched between the projecting pieces 16a on both sides, and the lower end conical hole 12a of the suction holder 12 is
The stopper 16 is attached to the holder 8 in a state where the stopper 16 is closed by the bent piece 6, so that the air is not sucked from the outside suction port 13.

The operation of the sucker device of the sheet-fed printing press configured as described above will be described. When the printing operation is started after the paper 1 is stacked on the paper stack via the paper stacking board, the suction pipe 4 moves up and down every time the sucker device 3 sucks one sheet of paper 1.
That is, by operating the suction air source, the intake pipe 4
When the suction pipe 4 is lowered by a cam mechanism (not shown) while suction air is acting on the paper 1 and the lower end opening of the suction holder 12 is seated on the upper end surface of the paper 1, the paper 1 is sucked through the suction hole 13 a of the suction port 13. Hole 12a whose open end is closed by
A negative pressure is generated in the inside, and the paper 1 is attracted to the opening end of the conical hole 12a, and the suction pipe 11 attracts the paper 1 to the opening end of the conical hole 12a against the spring force of a spring member (not shown). Then, it rises along the slide hole 8a. In the meantime, the suction pipe 4 is moved by a cam mechanism (not shown) in the paper transport direction on the left side of FIG. 2 to release the suction, so that the paper 1 is fed onto the feeder board via the paper feed roller and then supplied to the printing unit. Printing.

When the size of the printing paper 1 is changed to a small size such as a postcard and the outer suction device 5 is not used, a separately prepared stopper 16 is attached to the holder 8 of the outer suction device 5. I do. That is, prior to the start of the printing operation, with the suction pipes 11 of the two unused suction devices 5 located outside the paper 1 being lifted by hand, the stopper 16 is moved from the holder 8 side on the right side in FIG. When press-fitted, the holder 16 is clamped by the projecting pieces 16a on both sides, and the stopper 16 is mounted on the holder 8 in a state where the lower end conical hole 12a of the suction holder 12 is closed by the bent piece of the stopper 16. When the printing operation is started after the stopper 16 is attached in this manner, the lower end conical hole 12a of the outer holder 8 is formed.
Is closed by the stopper 16, no air is sucked from the outer suction port 13. Therefore, the air is sufficiently sucked from each suction port 13 at the center. Further, even when a part of the outer suction device 5 has a paper size corresponding to the edge of the paper 1, the lower end of the suction mouth 13 is regulated by the stopper 16, so that the edge of the paper 1 becomes dirty. Or scratched,
Or, the paper cannot be fed.

In this embodiment, an example is shown in which the stopper 16 is attached to and detached from the suction holder 8 in accordance with the dimensions of the paper 1. However, the present invention is not limited to this. For example, an L-shaped stopper may be used. Alternatively, the stopper may be pivotally attached to the holder 8 so as to be rotatable at all times, and when the paper has a small size, the stopper may be rotated to close the suction opening.

[0017]

As is apparent from the above description, according to the present invention, in the sucker device of the sheet- fed printing press, the paper width
A plurality of lower end suction holes that are parallel to
A suction port, a holder for supporting the suction port so as to be able to move up and down,
Block the lower intake hole of the unused suction port among multiple suction ports.
With the suction port raised with respect to the holder
By providing a stopper that locks freely, when the size of the paper to be printed is changed to small paper such as a postcard, it is easy to close the mouth with the stopper while pushing up the mouth by hand. The operation can stop the suction of air from the outside suction port, so that the suction of air from the suction port in the center is sufficiently performed and the function of the device is improved. Labor is reduced, the preparation time is shortened, and the operating rate of the machine is improved. Further, since the unused suction port does not descend and interfere with the paper, the occurrence of defective paper feeding and waste paper is reduced.

[Brief description of the drawings]

FIG. 1 is a front view of the suction port of a sucker device and the vicinity of a supporting device thereof.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a side view as viewed from IV in FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 paper 3 sucker device 5 suction device 13 suction port 13a suction hole 16 stopper

Claims (1)

(57) [Scope of request for utility model registration] 1. A lower part which is arranged in parallel in the width direction of paper and which sucks the paper.
A plurality of suction ports with end suction holes, and this suction port can be raised and lowered freely
A supporting holder, and an unused suction port among the plurality of suction ports.
Close the lower intake hole of the mouth and attach the intake to the holder.
With a stopper that is detachably locked when raised
A sucker device for a sheet-fed printing press, characterized by the fact that it is radiated.