JPH0130440Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a printing paper reversing and drafting device that can simultaneously flip the printed paper after printing to prepare for the next back side printing and also draft the paper to prevent blocking.

When printing on both sides, unless you are using a duplex printing machine, always print on one side, then turn it over and print the next print. This reversal of printed paper may be carried out by obtaining small-sized printed paper, but in the case of large-sized printed paper, reversing by obtaining it is quite labor intensive.

This invention mechanizes the work that used to be dependent on obtaining paper, freeing the worker from heavy labor, and also automatically performs the winding work to prevent reversing and blocking, and completes each process of printing paper. It is possible to provide an extremely effective device for creating a highly automated line.

The printing paper reversing and winding device according to the present invention includes:
As illustrated in FIGS. 1 and 2, there is provided a table 1 for supplying laminated printing paper, and a plurality of intermittent rotations having notches 3 pivoted at intervals on a rotating shaft 2 provided above the end of the table. a rotating drum 4, and at least two cutouts 3 of the rotating drum 4;
a first clamping means 5 for fixing the leading end of the printed laminated paper provided on the rotating drum 4;
a second clamp means 9 for fixing the rear end of the laminated printing paper to the rotating drum 4; Driving means 1 for rotating the clamping means 9 following the rotation of the rotating drum 4
2, an inverted laminated printing paper receiving table 17 provided above the laminated printing paper supplying table 1 and whose upper surface substantially coincides with the top of the rotating drum 4, and a frame 22 provided above the receiving table 17. It is characterized in that it has a third clamping means 23 for fixing the leading end of the laminated printing paper attached and moving along the table 17 onto the table 17.

To explain in more detail based on FIGS. 1 and 2, FIG. 1 is a partially omitted schematic side view of an embodiment of the device of the present invention. )P supply table 1 is
In order to facilitate the movement of the printing paper P, an air table is preferable, and the printing paper P is brought to the table 1 by an appropriate conveying means (not shown).

The rotating drum 4 is attached to the rotating shaft 2 shown in FIG. 2 at five points at intervals, and the rotating shaft 2 is attached to the belt 3
0 by motor M ₁ . Since the rotating drum 4 needs to rotate intermittently and at a precise rotation angle, the motor _M1 is equipped with an electromagnetic brake and is controlled by an encoder 31 that detects the rotation angle of the rotating shaft. However, instead of the encoder 31, a limit switch or a proximity switch (none of which is shown) provided on either the rotating drum 4 or the rotating shaft may be used.

The first clamping means 5 provided in the notch 3 of the rotating drum 4 includes an air cylinder 6 and a clamp head 7.
and a first clamping means for rotating the first clamping means.
A relief cylinder 5' of the clamping means 5 is provided. This relief cylinder 5' has the function of rotating the first clamping means 5 to a position where it does not get in the way when the printed paper is delivered to the printed paper receiving table 17. air cylinder 6
Compressed air for operating the rotary shaft 2 is supplied through a rotary coupling 32 provided at the end of the rotary shaft 2 through pipes 33 and 34 connected to the inside of the rotary shaft 2.

A light reflection type photoelectric converter can be used as the sensor 8 for detecting the trailing edge of the printing paper P, and the second clamping means 9, which is activated by a signal from this sensor, is composed of an air cylinder 10 and a clamp head 11. , the air cylinder 10 has a chain 15 provided between a sprocket 13 provided below and a sprocket 14 provided above the rotating drum 4, and the chain 15 is connected to the air cylinder with the same radius of curvature relative to the circumferential surface of the rotating drum 4. 10 is fixed to the chain 15 of the drive means 12 of the second clamp means, which includes a chain guide rail 16 for guiding the second clamp means.

The printed paper receiving table 17 is constituted by an endless rotating belt 21 stretched between a drive pulley 19 provided at the right end of a cantilevered stay 18 and another free pulley 20 supported at the left end of the stay 18. , this endless belt, each pulley is the second
As can be seen from the figure, a plurality of sets, six sets in the illustrated example, are provided between the rotating drums 4 to prevent the rotating drums 4 from colliding with the printed paper receiving table 17.

The third clamping means 23 consists of an air cylinder 24 and a clamp head 25 provided on the frame 22 above the printed paper receiving table 17, and the air cylinder 24 is stretched between sprockets 26 and 27 provided at both ends of the frame. The chain 28 is moved in the horizontal direction. The drive side sprocket 26 is rotated by a motor _M3 . Incidentally, this motor _M3 is also used to drive the receiving table 17 via a belt 40 and a clutch 41.

FIG. 3 shows a state in which the printing paper P to be inverted and aired is supplied to the device of the present invention, the first clamping means 5 operates in the first operation, and the front end of the printing paper is clamped and fixed on the rotating drum 4. It shows.

FIG. 4 shows that the rotating drum 4 rotates in the direction of the arrow from the state shown in FIG. At this time, the trailing edge of the printing paper has shifted.

FIG. 5 shows a state in which the rotating drum 4 has rotated approximately 180 degrees from FIG. In order to transfer the printed paper, the front end of the printed paper is clamped to the printed paper receiving table 17 by the third clamping means 23, the first clamping means 5 is opened, and the first clamping means 5 is moved to the right in the drawing by the relief cylinder 5'. It rotates in the rotational direction and is released to a position where it does not interfere with the subsequent conveyance of the printing paper P.

FIG. 6 shows that the rotary drum 4 rotates further and the printing paper P
is conveyed onto the printed paper receiving table 17 with the front end fixed by the third clamping means 23,
A state in which the rear end of the printing paper is slightly fixed onto the rotating drum 4 by the second clamping means 9 is shown. In this state, the printing paper P on the table 17 forms a partially raised mountain 36.
This mountain 36 is formed by bringing the printing paper P closely fixed along the circumferential surface of the rotating drum 4 onto the flat table 17.
At this time, if the second clamping means 9 is released and the third clamping means 23 is moved further to the right in the drawing together with the table 17, the pile of printing paper 36 will gradually collapse, and finally, as shown in FIG. It becomes flat like this.

By the operations shown in FIGS. 3 to 7 above, the printing paper P
are reversed and each sheet of printing paper is shifted once relative to each other, thereby creating a drafting effect and preventing mutual blocking of the printing sheets. Note that when air is blown from the side by the air nozzle 37 onto the mountain 36 in the state shown in FIG.
If step 6 is carried out by shifting the roll 38 to the left by means not shown, the effect of blowing air onto the printing paper can be further enhanced.

In the above description, the timing of each operating section was not described in detail, but this is done by setting appropriate timings using known limit switches and synchronous drive means.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of an apparatus showing an embodiment of the present invention, Fig. 2 is a front view of the same, and Figs. In the figure, 1 is a printing paper supply table, 3 is a notch of a rotating drum, 4 is a rotating drum,
5 is a first clamp means, 8 is a sensor for detecting the trailing edge of the printed paper, 9 is a second clamp means, 12 is a drive means for the second clamp means, 17 is a printed paper receiving table, 22 is a frame, and 23 is a second clamp means. 3 clamp means, P indicates the printing paper, respectively.

Claims (1)

[Claims for Utility Model Registration] A table 1 for supplying laminated printing paper, and a plurality of rotating drums 4 that rotate intermittently and have notches 3 that are fixed at intervals to a rotating shaft 2 provided above the end of the table. and a first clamp means 5 for fixing the front end of the printed laminated paper provided with at least two notches 3 of the rotary drum 4 to the rotary drum 4.
and a second clamp means 9 which is actuated by a sensor 8 that detects the trailing edge of the laminated printing paper conveyed along the circumferential surface of the rotating drum 4 and fixes the trailing edge of the laminated printing paper to the rotating drum 4. , a drive means 12 for rotating the second clamp means 9 following the rotation of the rotary drum 4, and an inverted clamp provided above the laminated printing paper supply table 1 whose upper surface substantially coincides with the top of the rotary drum 4. A movable table 17 for receiving laminated printed paper, and a frame 22 provided above the receiving table 17.
third clamping means 23 for fixing the leading end of the laminated printing paper moving along the receiving table 17 on the receiving table 17;
A printing paper reversing and drafting device comprising: