JP2528139B2 - Sheet pusher device for metal rotary printing press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a metal rotary printing press that presses a rear end portion of a printed material in order to feed the printed material to an impression cylinder and conveys the printed material. The present invention relates to a sheet pusher device in a metal rotary printing press, which is decelerated to a distance from a material to be printed.

(Prior Art) Conventionally, as a metal rotary press, there is known an apparatus that sequentially supplies a large number of sheets (printed materials) made of a tin plate or the like to an impression cylinder to perform printing.

In this device, for example, about 120 sheets of a material to be printed are supplied to the impression cylinder for one minute so that the material is sequentially printed. In this supply unit, the rear end portion of the material to be printed is pressed by the sheet pusher and conveyed. I am trying to let you. This sheet pusher conveys the material to be printed from the supply section at a constant speed, pushes the material to be printed into the impression cylinder, decelerates and then separates, and repeats this operation at a constant cycle. Due to its complexity, each part of the device is liable to be damaged by repeated operation, and therefore it was necessary to frequently replace damaged parts.

The structure of a conventional seat pusher will be described with reference to FIGS. 10 to 12. In FIG. 10, a roller base 1 is arranged at one end of an apparatus main body 11, and a pallet 2 is loaded from the side on the roller base 1, and a large number of sheets (printed materials) 3 are placed on the pallet 2. Are piled up and this is chain 4
It is designed to be raised by winding up. The raised printing material 3 is taken out one by one by a suitable means (not shown), conveyed by a belt conveyor, and supplied between the blanket cylinder 8 and the impression cylinder 9 below the plate cylinder 7, where a predetermined printing is performed. Then, it is taken out by the belt conveyor 10.

The belt conveyor has a pair of endless chains 5 in the width direction (direction perpendicular to the paper surface), which are hung on the sprocket wheels 28, 28a at both ends, and a pair of seat pushers 6a are attached to each of the endless chains 5. The endless chain 5 and sheet pusher 6a move at a speed slightly faster than the belt conveyor,
The sheet pusher 6a presses the rear end portion of the printed material 3 to apply a conveying force to the printed material 3.

The seat pusher 6a is configured as shown in FIGS. 11 and 12. That is, the main body 19 is coupled to the endless chain 5 via the pin 20,
A slide plate 22a is attached to the slide member 19 so as to be slidable in the front-rear direction, a segment gear 22 is movably fitted in the lower recess of the slide plate 22a in the front-rear direction, and the segment gear 22 is pushed forward by a spring 22b. Pressure is applied.

A rack gear 21 is attached to the lower portion of the main body 19 so as to be rotatable around a horizontal shaft 23, and a tooth portion 21a at an upper portion of the rack gear 21 meshes with the segment gear 22 to form a rack gear 21.
A roller 25 is attached to the other end of the.

A guide rail 26 that contacts the lower side of the roller 25 is arranged below the rack gear 21.
On the lower side of 26, there is a disc cam 27 that is eccentrically attached to the shaft 27a.
Are in contact.

The slide plate 22a is provided with an annular metal plate 24a with which the rear end portion of the material 3 to be printed is brought into contact. A cylindrical body 24b is fitted in the metal plate 24a and penetrates an eccentric hole of the cylindrical body 24b. The cylindrical body 24b and the metal plate 24a are attached to the slide plate 22a by the pin 24c. Therefore, by rotating the cylindrical body 24b around the pin 24c, the position of the dowel 24a in the front-rear direction can be adjusted. A pair of the abutments 24a are provided in the width direction, and the positions of the left and right abutments 24a can be made to be the same in the front-rear direction by adjusting this position.

In the above configuration, the substrate 3 is the sheet pusher 6a.
It is conveyed by being pressed by the press cylinder 9 and is supplied between the impression cylinder 9 and the blanket cylinder 8. However, when the tip end portion of the material to be printed 3 is held by the impression cylinder 9, it is necessary to release the pressing by the abutment 24a. is there. Therefore, when the seat pusher 6a reaches a predetermined position, the disc cam 27a pushes up the guide rail 26 and the roller 25
The segment gear 21 is rotated about the axis 23 via. As a result, the rack gear 22 meshing with the tooth portion 21a moves backward against the force of the spring 22b, and at the same time, the dowel 24a moves backward via the slide plate 22a.

Since the main body 19 is connected to the chain conveyor 5 via the pin 20 as described above, it moves at a constant speed. The advancing speed decreases, while the printing material 3 is pulled in at a constant speed by the impression cylinder 9, so that the dowel 24a is unlocked from the printing material 3.

As described above, the conventional seat pusher 6a has components such as the segment gear 21, the rack gear 22, and the slide plate 22a,
Alternatively, the disk cam 27 and the guide rail 26 for activating them are composed of components such as a very complicated structure, and they are repeatedly operated at a high speed, so that they have a drawback of poor durability.

(Object of the Invention) The present invention has been made in order to solve the above-mentioned conventional drawbacks, and is capable of transporting a printed material and delivering it to an impression cylinder with a simple structure, and thus has excellent durability. A sheet pusher device for a printing machine is provided.

(Structure of the Invention) The present invention relates to a sheet pusher device for supplying an object to be printed made of a metal sheet between a blanket cylinder and an impression cylinder, and a chain for conveying and supplying the object to be printed to the impression cylinder at a constant speed. A conveyor, a sheet pusher that is attached to the chain conveyor and presses the rear end of the material to be printed that is conveyed on the belt conveyor to apply a conveying force, and a drive means for the chain conveyor, and the chain conveyor Is a pair of endless chains in the width direction, which are hung on sprocket wheels at both ends, and the sheet pusher is supported by having an abutting portion that abuts on a rear end of an object to be printed. A detection unit that detects the time when the tip of the reaches the impression cylinder,
A deceleration unit that reduces the speed of the chain conveyor for a certain period based on this detection, and an acceleration unit that accelerates the chain conveyor by the deceleration amount after the elapse of the certain period are provided.

In the above configuration, the print object is conveyed by the sheet pusher, the detection means provided in the driving means of the sheet pusher detects that the sheet pusher has reached a predetermined position, and the deceleration means provided in the driving means The pusher movement is slowed down. Therefore, the seat pusher itself has a simple structure.

(Embodiment) In FIGS. 1 to 4, the sheet pusher 6 is a pair of front and rear with respect to the endless tune 5 of the chain conveyor that travels in U-shaped grooves facing each other formed in the frame 11 of the apparatus body. Connected by axes 30 and 31. This axis 3
A roller 12 is attached to each end of 0 and 31, and the roller 12
Is adapted to roll in the groove of the frame 11.

Further, the slide plate 6 is attached to the body 61 connected to the shafts 30 and 31.
2 is arranged, and the lower protruding portion 62a of the slide plate 62 is fitted into a through hole 60 formed in the main body 61 and extending in the front-rear direction, and the holding plate 63 and the stop bolt 63a that abut against the lower surface of the main body 61.
The slide plate 62 is thereby coupled to the main body 61 so as to be movable in the front-rear direction. A pressing force is applied to the slide plate 62 in the forward direction by the spring 65. Therefore, when a pressing force is applied to the slide plate 62 against the spring 65, the slide plate 62 moves backward.

On this slide plate 62, there is arranged an annular metal member (contact member) 64 with which the rear end portion of the material to be printed 3 is contacted.
A cylindrical body 67 is inserted into the cylindrical body 67, and a pin 68 penetrating the eccentric hole (eccentricity h) of the cylindrical body 67 inserts the cylindrical body 67 and the metal member
64 is attached to the slide plate 62. Therefore, the position of the dowel 64 can be adjusted by rotating the cylindrical body 67 around the pin 68. In the drawing, the structure of the main body 61 and the metal plate 64 is shown only on one side, but a left and right pair of these are formed, and the other side is also formed symmetrically with this.

The sprocket wheel 28 around which the endless chain 5 is stretched is connected to a drive shaft 29, and the drive shaft 29 is adapted to transmit a rotational force from a drive motor 80 via a transmission mechanism in the casing 100. The transmission mechanism of this drive means is configured as shown in FIGS.

In FIG. 5 and FIG. 6, the drive sprocket 82 to which the rotational force is transmitted from the drive motor is provided with the chain 81 between the sprocket 83 attached to the intermediate shaft 84 and the intermediate shaft 84. Gear 85 is installed, this gear 85
The gear 86 and the gear 87 of the shaft 29 are sequentially meshed with each other.

Further, the intermediate shaft 84 is provided with a small gear 89.
A gear 90 provided on a shaft 91 meshes with the shaft 91, and a cam 88 is provided on the shaft 91. Further, the intermediate shaft 84 is provided with an L-shaped lever 94 as shown in FIGS. 6 and 7, and one end of the lever 94 is coupled with the shaft 86a of the gear 86, and the other end of the lever 94 is connected. A shaft 92a is provided on the shaft 92, and a roller 92 is provided rotatably around the shaft 92a. The roller 92 is brought into contact with the outer peripheral surface of the cam 88 and is pressed against the outer peripheral surface of the cam 88 and a recess 88a formed in a part of the outer peripheral surface.

A holding cylinder 100a is provided in the casing 100, and an operating pin 95 supported by a compression spring 93 is arranged in the holding cylinder 100a. The tip of this operating pin 95 is fitted into the recess 94a of the tip of the lever 94, and
A force is applied to rotate 4 around axis 84 in a counterclockwise direction. By this force, the roller 92 is pressed against the outer peripheral surface of the cam 88 as described above.

Since the rotation of the cam 88 is interlocked with the rotation of the sprocket wheel 28, the recess 88a of the cam 88 and the roller 92 of the lever 94 fitted into the recess 88a detect the time when the material to be printed reaches the impression cylinder 9. Parts are made up.

In the above structure, the rotational force from the drive motor 80 is transmitted to the impression cylinder 9 and the gear 8
3,85,86,87 are transmitted to the drive shaft 29, the sprocket wheel 28 is rotated to move the seat pusher 6 at a constant speed, and the rotation of the intermediate shaft 84 causes the small gear 89, the gear 90, and the shaft to rotate. Rotate the cam 88 via 91.

Then, when the tip end of the printing material 3 pushed forward by the pusher 6 reaches the position where it is held by the impression cylinder 9, the roller 92 which is pressed against the outer peripheral surface of the cam 88 and is rolling is recessed 88a of the cam 88. , Which causes the lever 94 to rotate counterclockwise about the intermediate shaft 84 as shown by the phantom line in FIG. This lever 94
The rotation of the gear causes the gear 86 at its tip end to rotate counterclockwise while meshing with the gears 85 and 87, thereby reducing the rotational speed transmitted from the gear 86 to the gear 87. In FIG. 7, the solid line arrow indicates the normal speed, and the virtual line arrow indicates the deceleration state.

As the rotation further proceeds, the roller 92 comes out of the recess 88a, and at this time, the lever 94 rotates in the clockwise direction from the state of the phantom line to the state of the solid line.
86 moves in the opposite direction to the above, which increases the rotational speed transmitted to the gear 87 by the above-mentioned decrease amount.

On the other hand, when the front end of the material to be printed 3 reaches the position where it is held by the impression cylinder 9, the abutment 64 is slightly retracted by compressing the compression spring 65, and is also abutted by the transmission mechanism as described above. The moving speed of the gold 64 decreases for a certain period of time, and the gold 64 moves away from the rear end portion of the printing material 3. Then, the prize 64 increases to the speed decrease amount and then returns to the original constant speed.

FIG. 8 and FIG. 9 show an example of means for electrically controlling the reduction in speed for the sheet pusher 6 to separate from the material to be printed 3. The servo motor 101 that drives the sprocket wheel 28 includes a speed detector 102 and a position detector 10.
3 is provided, and a deceleration position detector 104 is arranged to detect that the seat pusher 6 moving together with the endless chain 5 has reached a predetermined position. Further, the reference speed detector 108 is provided in the impression cylinder 9.

With this configuration, when the print substrate 3 is placed on the chain conveyor and moves while the rear end portion is pressed by the sheet pusher 6, the sprocket wheel 28 is rotated by the servo motor 101 at a predetermined reference speed, The seat pusher 6 moves at a constant speed. The impression cylinder 9 also rotates at a constant speed in conjunction with this. During this time, the signal from the reference speed detector 108 is transmitted from the D / A converter 105 through the servo driver 106 to the servo motor 101.
If the rotation speed of the impression cylinder 9 fluctuates, the signal is also input to the servo motor 101, and the sprocket wheel 28 moves to the impression cylinder 9
Rotates at a speed corresponding to.

Further, the rotation of the servo motor 101 is detected by the speed detector 102, and when the rotation is changed, the detection signal is sent to the servo driver 106 to correct the rotation error.

Then, when the seat pusher 6 reaches a predetermined position, the switch of the deceleration position detector 104 is turned on, whereby the command from the deceleration position detector 104 is sent to the D / A converter 105, which causes the D / A converter. A deceleration signal from 105 is sent to the servo motor 101 through the servo driver 106. The deceleration signal is output by the seat pusher 6 as a deceleration position detector.
It can only continue while 104 is on.

Servo motor 101 according to the signal from deceleration position detector 104
Is decelerated, the detection signal detected by the position detector 103 is sent to the D / A converter 105, while the reference speed detector 108
A constant reference speed signal is input to the D / A converter 105. Therefore, the deviation generated between the input signal from the reference speed detector 108 and the deceleration signal output to the servo driver 106 is accumulated in the D / A converter 105, and this deviation is built in the D / A converter 105. It is counted by the counter.

When the seat pusher 6 passes over the deceleration position detector 104, the deceleration position detector 104 is turned off and the D / A converter 105
The signal to is stopped. On the other hand, from the position detector 103, the rotation position of the servo motor 101 (the position of the seat pusher 6)
Detection signal is being sent, and there is a deviation between the detection signal and the signal from the reference speed detector 108, the D / A converter
Depending on the deviation of the signal accumulated in 105, D / A converter 105
From the servo driver 106, the acceleration signal is sent to the servo motor 101. This makes the sprocket wheel 28
When the rotational speed of the servo motor increases, it is detected by the position detector 103, the signal is sent from the position detector 103 to the D / A converter 105, and when the deviation of the above signal disappears, the servo motor is rotated at the original speed. 101 will be driven.

That is, the speed increase is performed by the deceleration amount, and therefore the sheet pusher 6 reaches the position of the deceleration position detector 104 in a constant cycle, which completely matches the cycle of the sandwiching of the printing object 3 by the impression cylinder 9. Will be done.

In this way, the detection of the arrival of the seat pusher at a predetermined position and the deceleration based on it can be electrically performed.

(Effect of the Invention) As described above, according to the present invention, the detection means for detecting that the seat pusher has reached the predetermined position in the drive means for driving the seat pusher, and the speed of the seat pusher is decelerated by a certain amount by this detection. When the detection means detects that the seat pusher has reached a predetermined position, the speed reduction means slows down the movement of the seat pusher. Since it is not necessary to provide a speed reducer, the structure is simple and therefore the durability is excellent.

[Brief description of drawings]

FIG. 1 is a plan view of a seat pusher showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is III-I of FIG.
II line sectional view, FIG. 4 is a IV-IV line sectional view of FIG. 2, FIG. 5 is a plane sectional view of the transmission mechanism, and FIG. 6 is a vertical sectional view of FIG.
FIG. 7 is an explanatory view of the speed reducing mechanism portion of FIG. 6, FIG. 8 is a conceptual view of speed control means, FIG. 9 is an explanatory view of its block, and FIG. 10 is an overall side explanatory view of a metal rotary printing press. FIG. 11 is a perspective view of a conventional speed reducer mechanism for a seat pusher, and FIG. 12 is a longitudinal sectional view thereof. 3 ... Printed material, 5 ... Endless chain, 6 ... Sheet pusher, 8 ... Blanket cylinder, 9 ...
Impression cylinder, 28 ... sprocket wheel, 64 ... money, 88 ... cam, 94 ... lever.

Claims (1)

(57) [Claims] 1. A sheet pusher device for supplying an object to be printed made of a metal sheet between a blanket cylinder and an impression cylinder, and a chain conveyor for conveying and supplying the object to be printed to the impression cylinder at a constant speed. A sheet pusher for applying a conveying force by pressing the rear end of the material to be printed conveyed on the belt conveyor attached to the chain conveyor, and a driving means for the chain conveyor, the chain conveyor is a pair in the width direction. Endless chain is hung on the sprocket wheels at both ends, the sheet pusher has an abutting portion that abuts on the rear end of the printed material, and the drive means causes the leading end of the printed material to reach the impression cylinder. The detection unit that detects when A deceleration portion to reduce the speed of the bare,
A sheet pusher device in a metal rotary printing press, comprising: a speed increasing unit that speeds up the chain conveyor by the deceleration after the lapse of the certain period.