JPH0146314B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to printing machines.

In conventional printing presses, portions other than the plate cylinder of ink adhesion parts such as the plate cylinder, ink roll, and doctor are substantially fixedly attached to the main body frame of the printing press. For this reason, when performing maintenance inspections such as cleaning these ink rolls, replacing ink, etc., unless the entire printing press is disassembled, the work must be done in tight spaces and in inconvenient conditions. However, this was a very labor-intensive process, and the plate was easily damaged.

An object of the present invention is to provide a printing press that allows easy maintenance and inspection of ink rolls, etc.

In the present invention, the plate cylinder, ink roll, and ink reservoir are formed into an integrated block using a subframe, and this block is provided so that it can be pulled out from the main body frame via an intermediate frame, so that the entire block can be moved to a non-printing position during maintenance and inspection. The purpose is to achieve the above-mentioned purpose by making it possible to pull it out for maintenance, etc.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the overall structure of a printing press, and the overall structure and operation will be explained with reference to this figure.

A pair of main body frames 2 are erected on the base 1 in front and rear directions (in a direction perpendicular to the plane of the drawing). A paper feed roll 3 is stretched between the upper right ends of the main frame 2 in the figure, and a printing material 4 made of a continuous plastic film or bag is wound around the paper roll 3. There is. At this time, the wound part of the printing material 4, that is, the original fabric, may be a roll, a cassette, or a loosened version of these.

The outer end of the printing material 4 is transferred to the feed roll 3 via a fixed position intermediate roll 5 and a position adjustment intermediate roll 6.
The printing material 4 is fed out at a constant set speed by a pair of take-up rolls 7 provided on the left side of the printing material 4, and reaches a feed length detection means 10 for the printing material 4 through a tension adjustment means 8 and a guide roll 9.

The position adjustment roll 6 and the take-up roll 7 each include gate-shaped guide frames 6A, 7A and sliders 6B, 7B movable along the guide frames 6A, 7A.
By moving B and 7B manually with the handle 6C or automatically with the cylinder 7C,
The intermediate roll 6 can be adjusted in position, and the take-up roll 7 can be used to hold or release the printing material 4. At this time, the take-up roll 7 also includes a drive roll 7D. Further, the tension adjustment means 8 is composed of a movable roll 8A that can freely move up and down, and a biasing means such as a spring, a weight, or a cylinder (not shown) that biases the movable roll 8A downward. The tension on both sides is kept constant. Furthermore, feed length detection means 10
If there are phototube marks at predetermined intervals on the printing material 4, the phototube detection mechanism 10A is used, and if there are no marks, it rolls in contact with the surface of the printing material 4, and depending on the number of rotations (rotation angle). Detection roll mechanism 10 that detects the feed length of the printing material 2
B, and it is sufficient to provide either one of them. At this time, the detection roll mechanism 10B is not specially provided, and rotation speed detection means are provided on the take-up roll 7, adjustment roll 8, guide roll 9, etc., and each roll 7, 8, 9 detects the detection roll without providing a special roll. The roll of mechanism 10B may also be used.

The printing material 4 passes between a pair of brake rolls 11 as a brake means downstream of the feed length detection means 10. This brake roll 11 includes a moving roll 11A and a driving roll 11B, and the moving roll 11A is supported by a slider 11C and is movable along a gate-shaped guide frame 11E by a cylinder 11D, and holds the printing material 4 between the legs. Or, it is now possible to open it up. In addition, a chain 12 is attached to the drive roll 11B.
A clutch/brake 13 is connected through the clutch/brake 13, and the action of the clutch/brake 13 causes the brake roll 11 to be stopped, released from stopping, and rotated. At this time, brake roll 1
1, the feed amount of the printing material 4 by the brake roll 11 is set to be larger than the feed amount of the take-up roll 7, and when the brake roll 11 is stopped, the tension adjustment means 8 is moved in the slack direction, that is, the movable roll 8A is set to be larger than the feed amount of the take-up roll 7. Due to the downward movement of
The stored printing material 4 is pulled up in the feeding direction.

The printing material 4 that has passed through the brake roll 11 is
It extends to the plate cylinder 14, is provided so as to be movable up and down in opposition to the plate cylinder 14, and is wrapped around the outer periphery of an impression cylinder 15, which is rotated and stopped in conjunction with the brake roll 11. A printing cylinder moving mechanism 16 is connected to the impression cylinder 15, and the moving mechanism 16 moves the impression cylinder 15 toward the plate cylinder 14 so that the printing material is positioned between the impression cylinder 15 and the plate cylinder 14. 4
It is now possible to print on This moving mechanism 16 includes a cylinder 16A as a drive source that is activated by a predetermined signal such as a signal from a plate cylinder position detection means (not shown) or a brake release signal for the brake roll 11, and a piston rod 16B of this cylinder 16A. a slider 16C whose one end is connected to the slider 16C and whose other end rotatably supports the shaft of the impression cylinder 15;
and a gate-shaped guide frame 16D that guides the slider 16C in the vertical direction.

As will be described in detail later, the plate cylinder 14, together with an ink roll 17, an ink reservoir 18, a doctor 19, etc., is attached to a subframe 20 so as not to be movable in the height direction, thereby forming an ink adhesion block 21. This block 21 consists of a pair of intermediate rails 2
These intermediate rails 22 are supported by the main body frame 2 so as to be horizontally movable in the direction perpendicular to the plane of the paper in FIG.
The block 2 is supported so as to be horizontally movable in a direction perpendicular to the plane of the paper on a guide 23 attached to the block 2.
1 passes through the hole 2A formed in the main body frame 2 from the printing position facing the impression cylinder 15 to the non-printing position outside the main body frame 2, and takes it out in the horizontal direction while maintaining the height position (drawer) is made possible.

The printing material 4 that has passed through the impression cylinder 15 is
It passes through a guide roll 24 to a dryer 25 consisting of a heater, etc., and further passes through guide rolls 26 and 27 to a biasing means (not shown) such as a spring and the movable roll 2.
The product is taken up by a take-up roll 29 while the tension is controlled by a tension adjustment means 28 made of 8A, passed through a position adjustment roll 30, and then wound up by a product take-up roll 31.

A blower 33 is connected to the dryer 25 through a duct 32, and the printing surface is quickly dried by the action of the air from the blower 33 and its own heater. In addition, the dryer 25
The front cover 25A has a guide rail 25B and a roller 2.
5C, it is made movable in the direction perpendicular to the plane of the paper in FIG. 1, and the printing material 4 can be easily set in the dryer 25. Further, the take-up roll 29 and the position adjustment roll 30 have the same configuration as the take-up roll 7 and the position adjustment roll 6, respectively. That is, take-up roll 2
9 is a gate-shaped frame 29A, and this gate-shaped frame 2
9A includes a movable slider 29B, a cylinder 29C for operating the slider 29B, and a drive roll 29D, while the position adjustment roll 30 includes a portal frame 30A, a slider 30B movable to the portal frame 30A, and a drive roll 29D. 30B
It is equipped with a handle 30C for driving.

A main transmission motor 34 as a drive source is provided on the back side of the pair of main body frames 2 in the figure, and a reduction gear 38 is connected to the output shaft of this motor 34 via pulleys 35, 36 and a belt 37. . There are two sprockets 3 on the output shaft of this reducer 38.
9 is fixed.

One of the two sprockets 39 is connected via a chain 40 to a plate barrel driving sprocket 41 rotatably provided via a bracket (not shown) on the outside of the main body frame 2, and the rotation of this sprocket 41 is the sprocket 41
The plate cylinder 14 side is constantly rotated via a gear train (not shown) including a gear coaxial with the plate cylinder 14.
Further, the other side of the sprocket 39 is connected to the chain 4.
2 to an input sprocket 44 of a clutch brake 43, and an output sprocket 45 of the clutch brake 43 is connected to an input sprocket 48 of an intermediate shaft 47 via a chain 46. Here, the input side sprocket 44 of the clutch/brake 43 is shown to be smaller than the output side sprocket 45 for convenience of illustration, but they are actually of the same size, and the relationship between the input and output side sprockets described below is the same. It is.

The output side sprocket 49 of the intermediate shaft 47 is 3
One is connected to the drive roll 7D of the take-up roll 7 on the raw roll side through a chain 50, and the second is connected to the input side sprocket of the brake roll clutch/brake 13 through a chain 51. 52, and the chain 12 is connected to the output side sprocket 53 of this clutch/brake 13.
are connected, and the third one is chain 54,
The intermediate shaft 55 is connected to the drive roll 29D of the take-up roll 29 via an input sprocket 56, an output sprocket 57, and a chain 58.

Further, a winding motor 59 is provided on the back of the pair of main body frames 2, and a chain 61 is attached to a sprocket 60 fixed to the output shaft of this motor 59.
Sprocket 63 integrated with intermediate gear 62 via
A small gear 64 integrally fixed to the winding roll 31 is meshed with the intermediate gear 62, so that the winding roll 31 can be driven.

Next, the operation of this overall configuration will be explained.

With the printing material 4 inserted through each part, the main transmission motor 34 and the take-up motor 59 are driven to drive each roll, and the heater and blower 33 of the dryer 25 are operated. As a result, the printing material 4 wound around the feeding roll 3 is continuously fed out at a predetermined speed by the take-up roll 7, and is sent to the plate cylinder 14 side while the tension is controlled by the tension adjusting means 8. As a result of this feeding, when the phototube mark is detected by the feed length detection means 10 or a predetermined length is detected by the detection roll, the clutch/brake 13 of the brake roll 11 is actuated to apply the brake based on the detection signal. The brake roll 11 is stopped, and the flow of the printing material 4 downstream from the brake roll 11 is stopped. At this time, since the take-up roll 7 on the feeding side is continuously rotated, the movable roll 8A descends to prevent the tension of the printing material 4 from decreasing.

After the brake roll 11 is operated, when the plate cylinder position detecting means (not shown) detects that the plate cylinder 14 has reached a predetermined position, this detection signal causes the clutch/brake 13 of the brake roll 11 to
is operated to release the brake and transmit power, and the brake roll 11 is driven at a predetermined speed faster than the take-up roll 7.

On the other hand, the impression cylinder 15, which is rotated or stopped in conjunction with the brake roll 11, is lowered by the printing cylinder moving mechanism 16, which is activated by the detection signal of the plate cylinder position detection means, so that the printing material 4 is moved onto the plate. Printing is performed by being pressed against the cylinder 14 side. This moving mechanism 16 is operated in the upward direction when the plate cylinder 14 rotates once, and is stopped at the uppermost position to prepare for the next downward movement. At this time, by driving the brake roll 11 at a higher speed than the take-up roll 7, the movement of the tension adjusting means 8 in the slack direction that occurs when the brake roll 11 is stopped is corrected, and the movable roll 8A is returned to approximately the initial position.

Further, the timing at which the detection signal of the plate cylinder position detection means is transmitted and the driving speed of the brake roll 11 are determined after the transmission of the plate cylinder position detection signal and the drive speed of the brake roll 11.
1 is driven, and the printing surface of the printing material 4 is moved to the impression cylinder 15.
When it is sent to the printing start point above, it is just plate cylinder 1.
The timing and speed are such that the leading end side of the No. 4 plate (not shown) reaches the starting point.

The printing material 4 printed in this way is
It is sufficiently dried while passing through the dryer 25 by the hot air generated by the air blower 33 and the heater. Further, while the tension is controlled by the tension adjusting means 28, the product is taken up by the take-up roll 29 and wound onto the product take-up roll 31.

The above operations are continuously performed, and printing on the printing material 4 continues at predetermined intervals.

When checking the part of the plate cylinder 14 for cleaning, replacing ink, or other maintenance inspections after completing a specified printing process, pull the subframe 20 of the ink adhesion block 21, and the subframe 20 will be removed. The block 21 is moved horizontally along the intermediate rail 22 while maintaining its height on the front side of the paper in FIG. It is moved to a non-printing position protruding from the main body frame 2. Therefore, since the plate cylinder 14, ink roll 17, etc. are located in a position where there are no obstacles around them, cleaning etc. can be carried out very easily.

Next, the detailed structure and operation of the ink adhesion block 21 will be explained based on FIGS. 2 to 5.

The subframe 20 includes a bottom plate 20A and this bottom plate 2.
Side walls 20B are erected at both ends of 0A, and central shafts 14A and 17A of the plate cylinder 14 and ink roll 17 are rotatably supported between these side walls 20B via bearings 71, respectively. There is. At this time, the bearing 71 supporting the central axis 17A of the ink roll 17 is supported by the side wall 20B via the eccentric flange 72, and the eccentric flange 72
is fixed to the side wall 20B via a clamper 73. As a result, the position of the ink roll 17 can be adjusted by loosening the clamper 73 and rotating the eccentric flange 72.
The contact between the plate 74 and the plate 74 fixed to the surface of the plate cylinder 14 can be adjusted appropriately. Moreover, one side wall 20B of these intermediate shafts 14A, 17A
Gears 7 of the same shape that mesh with each other are attached to the ends protruding from the
5,76 are fixed.

The gear 75 on the plate cylinder side includes a gear train (not shown) provided on the main body frame 2 described in FIG. They can be connected via two coaxial gears (not shown) provided in the. In other words, the gear train includes, for example, a first gear coaxial with the sprocket 41, a second gear meshed with the first gear, and a plate fixed coaxially with the second gear. It is composed of a third gear meshed with a gear 75 on the body side, and a shaft to which these second and third gears are fixed and rotatably supported by the main body frame 2. At this time, block 21
is set exactly in the printing position, i.e.
When the movement of block 21 to the print position in the opposite direction is completed, gear 75 and a gear (not shown) (third gear)
As a result, the plate cylinder 14 and the ink roll 17 are connected to the output shaft of the main transmission motor 34, pulleys 35, 36, and belt 3.
7, reducer 38, sprocket 39 and chain 4
The parts that are always connected via 0, that is,
The plate cylinder 14 and the ink roll 17 are connected to the gear (not shown) through gears 75 and 76, so that the plate cylinder 14 and the ink roll 17 are always rotating when the main transmission motor 34 is driven.

A semi-cylindrical ink reservoir 18 is provided below the ink roll 17, and one horizontal edge of the ink reservoir 18 is attached to an L-shaped support bracket 77 projecting from the inner surface of both side walls 20B. On the other hand, the other end edge bent downward into a hook shape is supported by a receiving member 78 having a concave portion formed on the upper surface. This receiving member 78 is fixed to both ends of a stay plate 79 extending between both side walls 20B.

In addition, the lower part of the ink roll 17 is an ink reservoir 18.
It is immersed in quick-drying ink 80 stored inside. Ink 80 attached to this ink roll 17
The ink roll is scraped to a uniform thickness by the scraper 19A of the doctor 19 that is stretched between the both side walls 20B, and the ink roll is Splashing to the sides is prevented.

Further, a rotary disk 82 is provided on the central axis 14A of the plate cylinder 14.
is fixed, the notch 82A of this rotary disk 82 is detected by a reflected light detection type photo sensor 83 fixed to one side wall 20B, the position of the plate 74 fixed to the plate cylinder 14 is detected, and the signal is output. It is becoming more and more common.

Rollers 84 are rotatably attached to the front and back two locations on both sides of the bottom plate 20A of the subframe 20, and these rollers 84 are connected to the intermediate rail 22.
The roller 84 is inserted into the upper groove 22A of the roller 84, and stoppers 22B are screwed to both ends of the groove 22A to prevent the roller 84 from coming off. Also,
The guide 23 includes a pair of angular U-shaped rail supports 23A, an L-shaped bracket 23B for attaching the rail supports 23A to the main body frame 2, and a pair of rail supports 23A that extend inward from both sides of the rail supports 23A. These rollers 23C are inserted into lower grooves 22C provided on both sides of the intermediate rail 22, and there are rollers 23C at both ends of the grooves 22C. A stopper 22D is screwed to prevent the roller 23C from coming off. At this time, the positional relationship between the grooves 22A, 22C of the intermediate rail 22 and the rollers 84, 23C is schematically shown in FIG. That is, the rollers 23C of the guide 23 on the fixed side are provided at two locations, one at the front end of the intermediate rail 22 and the block 21 in the drawing direction (see arrow), and the other at the rear end slightly from the center. They are provided at two locations, one at the rear end in the pull-out direction and one slightly toward the front end from the center.

Ink adhesion block 2 configured in this way
1, pull the subframe 20 in the direction of the arrow in FIG.
2A to the left in FIG. This roller 84 is connected to the left stopper 22 of the intermediate rail 22.
When it comes into contact with B, the intermediate rail 22 itself moves into the groove 22.
C and the roller 23C of the guide 23 as a guide, and is pulled out to the left, and is stopped with the right stopper 22D of the intermediate rail 22 in contact with the roller 23C.

On the other hand, in order to store the block 21, the subframe 20 and the intermediate rail 22 can be pushed in the opposite manner to the above.

According to this embodiment as described above, the plate cylinder 14, ink roll 17, ink reservoir 18, etc. are integrated with the subframe 20 to form the block 21, and this block 21 is separated from the main frame 2 and is pulled out. Since it can be removed, maintenance and inspection of the plate cylinder 14 etc. can be done very easily. Furthermore, since the drawing direction is also a horizontal direction perpendicular to the feeding direction of the printing material 4, the printing material 4 is not affected in any way, and so-called off-line work is possible.
At this time, the block 21 is gear-coupled with the part that is constantly rotated by the main transmission motor 34 when the main transmission motor 34 is driven by simply moving the block 21 in the horizontal direction, so the connection structure can be simplified. In addition, drawer and storage operations can be performed quickly. Further, since the block 21 can be pulled out relative to the guide 23 via the intermediate rail 22, the distance to which the block 21 can be pulled out can be increased, and the block 21 can be pulled out when stored (when printing is set).
1 and the intermediate rail 22 are positioned so that they exactly overlap, so they do not interfere with the surroundings. Furthermore, the ink roll 17 is connected to the plate cylinder 1 by an eccentric flange 72.
4, the contact between the plate 74 of the plate cylinder 14 and the ink roll 17 can be adjusted appropriately. Furthermore, if a plurality of blocks 21 are manufactured and stored with different colors of ink 80 in the ink reservoir 18, the printing color can be easily changed by simply pulling out the blocks 21 and replacing them.
Further, the feeding of the printing material 4 and the driving of the plate cylinder 14 are performed at one time.
Since the printing can be performed using one drive source, that is, the main transmission motor 34, the timing of feeding and printing can be made good, and the apparatus can be provided in a small size and at low cost.
Further, since the drying means is constituted by the air blowing by the blower 33 and the heater of the dryer 25, the printing material 4 made of a material that is difficult to dry, such as plastic film,
However, it can be dried quickly. Furthermore, the block 2 is inserted through the hole 2A formed in the main body frame 2.
1 is pulled out, there is almost no weakening of the structural strength of the main body frame 2, and the conventional structure can be used as is.

As described above, according to the present invention, it is possible to provide a printing press in which maintenance and inspection of plate cylinders and the like are extremely easy.

[Brief explanation of drawings]

FIG. 1 is a front view showing the overall configuration of a printing press according to the present invention, FIG. 2 is an enlarged sectional view of the ink adhesion block in FIG. 1, and FIG. 3 is an arrow taken along the - line in FIG. FIG. 4 is a cross-sectional view taken along the line - in FIG. 2 with a part of the intermediate rail cut away, and FIG. 5 is an explanatory diagram showing the relationship between the intermediate rail and each roller. 2... Body frame, 4... Printing material, 14...
... plate cylinder, 15 ... impression cylinder, 17 ... ink roll,
18... Ink reservoir, 19... Doctor, 20... Subframe, 21... Ink adhesion block, 2
2... Intermediate rail, 22A, 22C... Upper groove and lower groove, 22B, 22D... Stopper, 23...
...Guide, 23C...Roller, 34...Main transmission motor, 74...Plate, 80...Ink, 84...Roller.

Claims (1)

[Claims] 1. The plate cylinder, ink roll, and ink reservoir are formed into an integral block that is immovable in the height direction by a subframe, and this block moves from the printing position to the non-printing position in the horizontal direction perpendicular to the feeding direction of the printing material with respect to the main frame. The block is provided so that it can be pulled out while maintaining its height through a hole formed in the main body frame, and the block is supported by an intermediate rail so as to be movable in the drawing direction, and this intermediate rail is attached to the main body frame. The intermediate rail is provided so as to be movable a predetermined distance in the same direction as the block with respect to the provided guide, and the intermediate rail is set to be moved to a position substantially overlapping the block when the block completes movement in the opposite direction to the print position, and When the movement of the block toward the printing position in the opposite direction is completed, the plate cylinder and the ink roll are connected in gear to a gear that is constantly connected to the output shaft of a main transmission motor, and this main transmission motor is used to feed the printing material. The ink roll is attached to the subframe via an eccentric flange and a clamper to enable positional adjustment with respect to the plate cylinder, and the impression cylinder facing the plate cylinder is attached to the main body frame. For,
A printing machine characterized by being installed so that it can move up and down.