JPS6346434Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a paper feeding device for a sheet-fed printing press.

A conventional paper feeding device for a sheet-fed printing press will be explained with reference to FIG. The paper feeding device of a sheet-fed printing press feeds the stacked sheets one by one to the printing mechanism.
Air sent by a pump (not shown) is discharged from a first blowing nozzle a arranged at the upper rear surface of the stacking section, and the paper is first separated one by one so that it can be easily carried.
Next, the first suction nozzle b sucks the topmost sheet of paper, and at the same time, air is discharged from the second blowing nozzle c to ensure that only the topmost sheet of paper lifts up and can be separated from the paper below. . Next, a pair of second suction nozzles d on the left and right in the traveling direction suck the paper. The second suction nozzle d is reciprocated by a link mechanism, moves forward while adsorbing the paper, engages the roller e, and feeds the paper to the printing section h via the feeder board f. At this time, a front end mechanism provided at the front end of the feeder board positions the leading edge of the paper so that it is parallel to the printing cylinder. The length of time that the paper is held by this pre-holding mechanism is limited due to timing considerations, so as the machine speeds up, the time required for the pre-holding mechanism to straighten the paper becomes shorter. Therefore, the flow of paper sent out by the paper feeding device must be sent out to the printing section with high precision and without bending.

However, in the paper feeding device described above, the flow of paper is fixedly curved relative to the front mechanism (the front end of the paper is When the water was tilted at a certain angle) there was some flow.

The present invention has been proposed in view of the above, and is intended to provide a paper feeding device for a sheet-fed printing press that is equipped with a mechanism for correcting paper curvature.

The present invention provides an adjustment mechanism that adjusts the stroke of the reciprocating motion in either one of a pair of suction and conveyance mechanisms that are disposed on the left and right sides above the paper stacking section to reciprocate in the front and rear directions, and that sucks paper and conveys it to the feeder board. If the paper is flowing in a curved manner, the bending condition is checked and the adjustment mechanism adjusts the reciprocating stroke of one suction conveyance mechanism to prevent the paper from being curved before it enters the feeder board. Since the paper can be corrected, paper can be accurately fed to the feeder board at all times, allowing for faster work.

The present invention will now be described with reference to the most preferred embodiments shown in FIGS. 2 through 8. In the figure, 1 and 1' are frames that support the paper feed head, and 2
3 is the first blowing nozzle; 4 is the stacked sheet; 3 is the first blowing nozzle;
5 is a second blowing nozzle, 5 is a first suction nozzle, 6 is a suction conveyance mechanism that reciprocates in the front and back direction with a link mechanism, 7 is a roller that conveys the paper, 8 is a conveyance belt,
9 is a feeder board, and 10 is a printing section. 11
is a shaft whose both ends are rotatably supported by the operating side frame 1 and the driving side frame 1'. 1
A lever 2 has one end fixed to the center of the shaft 11 with a pin, and a cam follower 31 is fixed to the other end of the lever 12 with a mounting bolt 32. 33 is a cam whose outer periphery has a predetermined shape and is disposed at a position in contact with the cam follower 31;
1' is rotatably supported. 13 is a lever whose one end is fixed to the drive side end of the shaft 11 with a pin;
Reference numeral 14 denotes a lever having one end fixed to the operating end of the shaft 11 with a pin, and reference numeral 15 a lever having one end rotatably attached near the operating end of the shaft 11. One end of the lever 21 is connected to a pin 30' at the other end of the lever 13.
It is rotatably mounted. A lever 16 has one end rotatably attached to a shaft 28 fixed to the drive side frame 1', and the other end rotatably attached to a pin 45' provided at the intermediate portion of the lever 21. A pipe 23' supporting a second suction nozzle 24' is fixed to the other end of the lever 21.
One end of the lever 20 is connected to the pin 3 at the other end of the lever 15.
It is rotatably mounted at 0. A lever 17 has one end rotatably attached to a shaft 29 fixed to the operation side frame 1, and the other end rotatably attached to a pin 45 provided at the intermediate portion of the lever 20. A second suction nozzle 2 is provided at the other end of the lever 20.
A pipe 23 supporting 4 is fixed. 18
is an arm fixed to the operation side of the shaft 11 with a pin, and a rod 19 is attached to the arm 18 with a pin 19'. The rod 19 is the operating side frame 11
It is guided by a support column 25 fixed to , and has a threaded portion at its tip, into which a nut 27 is screwed. A spring 26 is attached between the nut 27 and the column 25. The spring 26 acts to press the cam follower 31 against the cam 33.
The above is the structure of the link mechanism that reciprocates the second suction nozzles 24, 24' back and forth.

Next, an adjustment mechanism for adjusting the reciprocating stroke of the second suction nozzle 24 will be explained. Lever 17
A stand 37 is bolted to the stand 37, and an elongated hole 22 is provided in the stand 37. Piece 36 is slot 2
2 and is slidably supported on a stand 37. 34 is rotatably supported at one end by a pin 35 at the tip of the lever 14, and the other end is supported by a pin 35' at the top 36.
It is a bar that is rotatably supported. 39 is a stand bolted to the lever 17. A bracket 41 is bolted to the operation side frame 1, and a knob 44 is fitted into a slit cut into the lower part of the bracket 41. The knob 44 has an internal hole with a female thread, into which an adjustment bolt 43 is screwed. Adjustment bolt 43
A groove is provided in a part of the bracket 4.
A pin 42 screwed into the adjustment bolt 43 engages with the groove and prevents the adjustment bolt 43 from rotating. Therefore, knob 4
4, the adjustment bolt 43 moves up and down. 4
0 is a wire, one end of which is fixed to an adjustment bolt 43, and the other end of which is locked to a piece 36.
40' is a cover for protecting the wire 40, and one end is fixed to the stand 39 and the other end is fixed to the bracket 41. A spring 38 is guided by the stand 37 and installed between the stand 39 and the piece 36, and presses the piece 36 in the opposite direction to the stand 39. Second suction nozzle 24'
is reciprocated in the front-back direction in response to the reciprocating swing of the lever 13 by a link mechanism composed of the lever 13, the lever 16, and the portion between the pin 30' and the pin 45' of the lever 21. On the other hand, the second suction nozzle 24 has a link mechanism composed of the lever 15, the lever 17, and the part between the pin 30 and the pin 45 of the lever 20, and the shaft 29 of the lever 14, the lever 34, and the lever 17.
A double crank mechanism with a link mechanism consisting of the part between the levers 14 and 1
It reciprocates in the front and back direction in response to the reciprocating swing of 5. When the position of the top 36 changes, the behavior of the latter link mechanism changes, the amount of swing of the lever 17 changes, and thereby the reciprocating stroke of the second suction nozzle 24 changes.

Moreover, the first blow nozzle 3, the second blow nozzle 4, the first suction nozzle 5, and the second suction nozzle 24,
Reference numeral 24' is configured to blow out and suck air according to a predetermined sequence by a pump (not shown).

This embodiment is configured as described above, and the first
Air is discharged from the blowing nozzle 3 and the paper 2 is separated one by one so that it can be easily carried.Then, the first suction nozzle 5 sucks the topmost sheet of paper, and at the same time the air is discharged from the second blowing nozzle 4. to ensure that the paper is separated from the paper below, and then the second suction nozzle 24,
24' sucks the paper. Second suction nozzle 24,2
4' is the cam follower 31 as the cam 33 rotates.
The lever 12 swings through the shaft 11, and the movement
By swinging the levers 13, 14, and 15 through the link mechanism, reciprocating motion is performed in the front-back direction. Move forward with the paper adsorbed and transfer the paper to roller 7.
Stops adsorption when it is bitten. Paper is roller 7
The paper is then transported on a feeder board 9 by a transport belt 8 and sent to a printing section 10 . At this time, if the paper caught in the roller 7 is bent diagonally, rotate the knob 44 to move the frame 36 via the adjustment bolt 43 and wire 40 to move the second suction nozzle 24 back and forth. By changing the length of one side of the link mechanism to be moved, the second suction nozzle 24
Correct the bend by changing the reciprocating stroke of the

According to this embodiment, the reciprocating stroke of one of the second suction nozzles can be adjusted by rotating the knob, thereby making it possible to correct the bending of the paper before it enters the feeder board. Therefore, it is possible to speed up printing work. In addition, since the adjustment part for the above adjustment is installed using a wire and separated from the moving part of the link and lever that is the part to be adjusted, it can be adjusted safely and easily and accurately while monitoring the paper feeding condition (how much the paper is bent). can.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the general structure of a conventional sheet-fed printing press, FIGS. 2 to 8 show an embodiment of the present invention, FIG. The figure is an enlarged side view of part A in Fig. 2.
The drawing is an enlarged side view of section B in Fig. 2, Fig. 5 is a sectional view taken along line C-C in Fig. 3, and Fig. 6 is a sectional view taken along line D--in Fig. 3.
7 is a side view illustrating the function of FIG. 3, and FIG. 8 is a view taken along line EE in FIG. 6. 6...Adsorption conveyance mechanism, 44...Knob (adjustment section).

Claims (1)

[Scope of utility model registration request] Either one of a pair of suction conveyance mechanisms arranged to reciprocate in the front and rear directions above the left and right sides of the paper stacking section to suction paper and convey it to the feeder board is provided with an adjustment mechanism for adjusting the stroke of the reciprocating movement. A paper feeding device for a sheet-fed printing press characterized by the following.