JPS6212602Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a position adjustment device for a paper discharge roller system of an offset printing machine.

For example, as shown in FIG. 1, an offset printing machine has a plate cylinder 1 on which an original is wound, and a transfer cylinder 2 on which an ink image on the original is transferred, which are in pressure contact with each other. It mainly consists of an impression cylinder 3 that holds the printing paper from the paper device and sends it to the discharge side. Here, the printing paper P sent from the paper feeding device 4 via the pair of feeding rollers 5 is printed while passing between the transfer cylinder 2 and the impression cylinder 3, and the leading edge of the printing paper P is printed by the separation member 6.
The printed paper is separated from the impression cylinder 3 by the rollers 3 and held by the paper discharge roller system 7, and is discharged and stored on the discharge table 8.

By the way, in the generatrix direction of the circumferential surface of the impression cylinder 3, there is a third
As shown in the figure, a pair of printing paper presser guide rollers 10 and 11 are arranged in a distributed manner. As shown in FIG. 1, this pair of rollers 10 and 11 are in contact with the impression cylinder 3, and follow the rotation of this impression cylinder to rotate in the direction of the arrow, and the rotational frictional force at this time causes the printing paper to is sent out to the paper ejection roller system 7. Further, the printing paper holding guide rollers 10 and 11 press both side edges of the printing paper against the circumferential surface of the impression cylinder so that the printing paper moves from the contact point between the transfer cylinder 2 and the impression cylinder 3 to the rollers 10 and 11. Prevent it from rolling up in between. This curling occurs because an ink image is placed on the transfer cylinder 2, and the printing paper is attracted by the adhesiveness of the ink image.

The printing paper presser guide rollers 10 and 11 accomplish the above-mentioned functions.Next, the functions of the paper ejection roller system 7 will be specifically explained. The paper ejection roller system 7 is disposed in the printing paper ejection direction, and as shown in FIG.
and a pair of paper ejection rings 14 and 15 that are fitted onto the circumferential surface of the roller 16.

The printing paper discharge press rollers 12 and 13 are distributed in the axial direction of the impression cylinder 3, so to speak, in the axial direction of the paper discharge roller 16, and form a pair with the same roller 16. Note that the paper ejection rings 14 and 15 rotate integrally with the paper ejection roller 16 when it rotates.
It is capable of sliding in the axial direction of the roller 16.

In FIG. 1, the printing paper P is discharged one after another at high speed from between the transfer cylinder 2 and the impression cylinder 3, as shown in FIG.
3 and the paper discharge roller 16. At this time, the rollers 12, 13 and the paper ejection rings 14, 15
The printing paper P is discharged and conveyed in cooperation with each other to curve both side edges of the printing paper P as shown in the figure. When the printing paper is discharged and conveyed in this manner, the printing paper is given rigidity, that is, it becomes stiff, and the printing paper does not wobble in this direction of travel.

By the way, in FIG. 2, if the printing paper P is, for example, of B4 size, and now printing is to be performed using B5 size printing paper, which is smaller than that size, a pair of printing paper ejection pressing rollers 12, 13, a pair of paper ejection rings 14, 15, etc., must be moved inward and placed at the imaginary line position, which is the ejection and conveyance position for B5 size printing paper. On the other hand, as shown in FIG. 3, the printing paper presser guide rollers 10 and 11 press both side edges of the printing paper P against the impression cylinder 3. In this case,
If the image area P _A of the printing paper P is biased to the right as shown in the figure, one of the printing paper guide rollers 11 will come into contact with the image area P _A , and the ink on the image area will adhere to the roller 11. There is a risk that this may occur. In order to prevent such a problem, it is sufficient to leave the other paper presser guide roller 10 fixed and move only the other guide roller 11 to the imaginary line position.

By the way, as shown in FIG. 2, the printing paper presser guide roller 10 and the printing paper discharge presser roller 12 are each mounted on a support arm 17 and a support lever 18, which are connected to each other at their base ends. Conventionally, when changing the size or moving only one of a pair of paper ejection roller systems independently,
After stopping the offset printing machine, support arm 1
7, the paper ejection ring 14, etc., are manually moved in the axial direction of the shaft 19 and the paper ejection roller 16, respectively. This is because if such work is performed while the printing press is in operation, safety may be compromised.

In addition, when performing the above-mentioned work with the printing press stopped, the printing paper presser guide rollers 10, 11
In order to align the paper ejection roller system 7 including
This kind of work is extremely troublesome. Furthermore, printed paper ejection press rollers 12 and 13, a paper ejection ring 14,
15, and this type of moving work is also extremely troublesome.

The present invention was developed in view of the above points, and it is possible to simultaneously move the paper ejection roller system such as the printing paper presser guide roller, the printing paper ejection presser roller, and the paper ejection ring while the offset printing machine is in operation. It is an object of the present invention to provide a paper ejection roller system position adjustment device for an offset printing machine, which is capable of moving paper ejection roller systems distributed on both sides independently of each other.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.
In addition, among the members used in the explanation of the conventional example,
Components that achieve the same functions are designated by the same reference numerals for convenience in the present invention.

In FIG. 4, both shaft ends of the handle shaft 23 are rotatably supported by both substrates 24 and 25 facing each other.
A handle 26 is fixed to one end of the shaft. A sleeve 27 is fitted into one end of the cylindrical discharge roller 16, and the roller 16 and sleeve 27 are substantially integrated. The sleeve 27 is supported by the handle shaft 23 via a bearing 28, and the other end of the paper discharge roller 16 is also supported by a similar bearing. Note that the sleeve 27 has a gear portion 27a.

When the printing press is in operation, the paper ejection roller 16
Drive system gear 31 and gear portion 27 that meshes with it
It is rotationally driven in the direction of the arrow by a. At this time, the paper ejection rings 14 and 15 are also configured to rotate integrally with the paper ejection roller 16, whereas the printed paper ejection press rollers 12 and 13 are driven to rotate as the printed paper moves.

Two mutually parallel first and second drive screw shafts 31 and 32 are disposed below the paper discharge roller 16, and a gear 3 is mounted on each screw shaft 31 and 32.
4 and 35 are fixed, and the gear 34 of these is meshed with the gear 33 fixed to the handle shaft 23. First and second drive screw shafts 3
1 and 32, the first and second screw blocks 3
8 and 39 are attached, of which the first screw block 38 is attached to the threaded portion 3 of the first drive screw shaft 31.
1a, and is also fitted into a shaft portion of the second drive screw shaft 32 which is not threaded. The second screw block 39 is screwed into the threaded portion 32a of the second drive screw shaft 32, and
Fits into a shaft that does not have a thread.

One paper ejection ring 1 on the circumferential surface of the paper ejection roller 16
4 fits into the first screw block 38, and
The other paper ejection ring 15 is connected to the second screw block 39
It is stuck inside. That is, the second screw block 38
In this case, one paper ejection ring 14 is connected to the first drive screw shaft 3.
It is connected and screwed to the threaded portion 31a of No. 1. Further, the second screw block 39 connects and screws the other paper discharge ring 15 to the threaded portion 32a of the second drive screw shaft 32. Note that both threaded portions 31a,
32a are both right-handed screws.

In FIG. 4, first and second screw shafts 51 and 52, which are rotatably supported by bearings 58 and 59, are arranged in the same axial direction, and the threaded portion of the first screw shaft 51 is shown in FIG. A boss 17a of the support arm 17 is screwed into the hub 51a, and the base end of the support lever 18 is fitted into the boss 17a as shown in FIG. That is, both rollers 10 and 12 are
It is connected and screwed to the first screw shaft 51 via the support lever 18 and the support arm 17. Further, the boss 21a of the support arm 21 is screwed into the threaded portion 52a of the second screw shaft 52, and the base end portion of the support lever 22 is fitted into the boss 21a. That is, both rollers 11,1
3 is connected to the second via the support lever 22 and the support arm 21.
It is connected and screwed to the screw shaft 52. Note that one threaded portion 51a is a right-handed thread, and the other threaded portion 51a is a right-handed thread.
2a has a left-hand thread.

Support member 5 fixed to guide shaft 53 with screws
4 supports each shaft end of the first and second screw shafts 51 and 52. The second screw shaft 52 and the guide shaft 5
A spring 5 is attached to the proximal end side of the connecting rod 55 that connects the spring 5.
6 is attached, and the first screw shaft 51
A spring (not shown) is attached to the base end side of a connecting rod (not shown) that connects the guide shaft 53 and the guide shaft 53, and the elasticity of both springs causes the pair of printing paper holding guide rollers 10, 11 to move as shown in FIG. As shown in the figure, it is in pressure contact with the circumferential surface of the impression cylinder 3.

Here, to describe the operation of the device according to the present invention, in FIG. 4, when the handle 26 is rotated in the direction of the solid line arrow, the gear 34 is rotated in the direction of the arrow via the gear 33 on the handle shaft 23. .
Then, the first drive screw shaft 31 rotates integrally in the same direction, and due to the screw feeding action of the threaded portion 31a, the first drive screw shaft 31 rotates integrally in the same direction.
The screw block 38 moves in the direction of the arrow. That is,
The threaded portion 31a is a right-handed thread, and the first threaded block 38 moves in the direction of the arrow. At this time, the second
Since the screw block 39 only fits into the first drive screw shaft 31, it does not move. By moving the first screw block 38, one of the paper ejection rings 1
4 moves onto the circumferential surface of the paper ejection roller 16 in the direction of the arrow.

On the other hand, when the first drive screw shaft 31 rotates in the direction of the arrow, the sprocket 41 at the end of the shaft and the chain 4
2, a sprocket 43 and a gear 44 integral therewith rotate in the direction of the arrow. Then, the gear 45 fitted on the shaft 57 rotates in the direction of the arrow, and the gear 46 meshing with this gear 45 rotates in the direction of the arrow.
Therefore, the first screw shaft 51 to which the gear 46 is fixed rotates in the direction of the arrow, and since the threaded portion 51a has a right-hand thread, the boss 17a is threaded in the direction of the arrow.

That is, the printing paper holding guide roller 10 and the printing paper discharge holding roller 12 move in the direction of the arrow. In other words, the rollers 10, 12 and the discharge ring 14 move with relative positions as shown in FIG.

Next, when the handle 26 is manually pulled out in the direction of arrow A, the stop ring 36 at the end of the handle shaft 23 comes into contact with the base plate 25. In this state, the handle shaft 23 is click-stopped by appropriate means. In addition, when the handle shaft 23 is click-stopped, the gear 33
meshes with the gear 35 on the second drive screw shaft 32. In this way, the handle shaft 23 is slidable in the axial direction, and the bearing 28 and the handle shaft 23 are relatively loosely fitted. When the handle 26 is pushed in after being pulled out, the stopper pin 37 comes into contact with the base plate 25, and the handle shaft 23 is click-stopped.

Now, returning to the original explanation, gear 33 is gear 3
5, when the handle 26 is turned in the direction of the dotted arrow, the gear 35 is engaged with the second gear via the gear 33.
rotates together with the drive screw shaft 32 in the direction of the dotted arrow;
The second screw block 39 is moved by the screw feeding action of the screw portion 32a of the screw shaft 32. In this case, since the threaded portion 32a is a right-handed thread, the second threaded block 39 moves in the direction of the dotted arrow, and
The paper ejection ring 15 slides on the circumferential surface of the paper ejection roller 16 in the direction of the dotted arrow.

On the other hand, when the second drive screw shaft 32 rotates in the direction of the dotted arrow, the shaft 57 rotates in the direction of the dotted arrow via the sprocket 47, chain 48, and sprocket 49. The rotation of the shaft 57 is controlled by the gear 61,
is transmitted to the second screw shaft 52 via the gear 62,
The threaded shaft 52 rotates in the direction of the dotted arrow. Since the threaded portion 52a of the screw shaft 52 is a left-handed thread, the boss 21a is threaded in the direction of the dotted arrow. That is, the printing paper pressing guide roller 11 and the printing paper discharge pressing roller 13 move integrally in the direction of the dotted line arrow. Then, both rollers 11 and 13 and the paper discharge ring 15 move with a predetermined relative positional relationship.

The above is a case where the pair of paper ejection roller systems arranged on both sides are expanded from a narrowed state.
The operating direction of the handle 16 may be reversed.
Note that the position adjustment of the paper ejection roller system can also be performed while the printing press is in operation, that is, while the plate cylinder 3, the paper ejection roller 16, etc. are rotating. It is also possible to move only one of the pair of paper ejection roller systems independently.

In addition, the sprocket 41, the chain 42, the sprocket 43, the gear 44, the gear 45, and the gear 4
6 and the like constitute a first rotation transmission means for transmitting the rotation of the first drive screw shaft 31 to the first screw shaft 51. Also, sprocket 47, chain 4
8, the sprocket 49, the shaft 57, the gear 61, the gear 62, etc. constitute a second rotation transmission means for transmitting the rotation of the second drive screw shaft 32 to the second screw shaft 52.

Note that, as shown in FIG.
, the adjustment screw 65, and the slider 66, it is possible to displace only the paper discharge ring 14 to an arbitrary position. That is, by appropriately rotating the adjustment screw 65, the slider 66 moves in the direction of the arrow, and the paper discharge ring 14 moves. Also,
If the paper ejection ring 15 has the same structure, the ring 15 can be adjusted to any position.

Note that the handle 26 may not be rotated manually, but may be automatically rotated by a motor or the like.

By the way, in some conventional devices, the lower end of the arm is fixed to each side in the longitudinal direction of the screw blocks 38 and 39 shown in FIG. It has a configuration in which a printing paper discharge presser roller 12 is attached, and in this case, when printing is performed using relatively small-sized printing paper, it is possible to print a relatively large-sized paper while keeping both screw blocks in the narrowed state. When printing is performed using a large size printing paper, there is a risk that both edges of the large size printing paper will collide with both arms, resulting in a jam.

On the other hand, the apparatus of the present invention does not have the above-mentioned arm, and the printing paper press guide roller and the print paper discharge press roller are directly connected and screwed to the screw shaft. If the edges of the printing paper collide with the arm, causing a jam,
1) Malfunctions of conventional devices can be prevented.

Incidentally, in this type of offset printing press, the printing position is adjusted vertically, but in this case, each cylinder must be manually rotated as shown in FIG. Handle 6 shown in the figure
7 accomplishes that function. For example, when the handle 67 is manually rotated, the gears 68, 6
The transfer cylinder 2 is rotated via the cylinder 9, and the impression cylinder 3 and the plate cylinder 1 are also rotated by means of a suitable gear mechanism.

Normally, when rotating the handle 67 manually,
Due to the load, steering becomes difficult. Therefore, when the handle is gripped and rotated, slippage may occur between the hand and the handle. Therefore, by providing the back side of the handle 67 with wavy projections and depressions for a grip, the above-mentioned slip can be prevented. In addition, handle 6
7 is in a rotating state when the printing press is in operation, and if the above-mentioned unevenness is provided on the front side of the handle, the unevenness will be located on the operation side, which poses a danger. Therefore, by providing the unevenness on the back side of the handle, this risk can be eliminated.

As described above, according to the present invention, while the offset printing machine is in operation, the paper ejecting roller system such as the printing paper press guide roller, the printing paper ejection holding roller, and the paper ejection ring can be moved simultaneously, and they can be distributed and arranged on both sides. A position adjustment device for the paper ejection roller system of an offset printing machine that can move the paper ejection roller system independently of each other, guarantees safety, and makes it extremely easy to adjust the position of the paper ejection roller system. can be provided.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram showing an example of an offset printing machine used in explaining the present invention, Fig. 2 is a side sectional view of a paper ejection roller system included in the offset printing machine, and Fig. 3 is a printing Diagram 4 for explaining the positional relationship between the paper presser guide roller and the image area of printing paper.
The figure is a perspective view of a position adjustment device for a paper ejection roller system of an offset printing machine according to an embodiment of the present invention, FIG. 5 is a perspective view showing another example of a moving mechanism for a paper ejection ring, and FIG. FIG. 3 is a perspective view of a manual rotation operation mechanism such as a transfer cylinder. 2... Transfer cylinder, 3... Impression cylinder, 10, 11... Print paper press guide roller, 12, 13... Print paper discharge press roller, 14, 15... Paper discharge ring, 16
... Paper ejection roller, 23 ... Handle shaft, 31 ...
First drive screw shaft, 32...Second drive screw shaft, 51
...First screw shaft, 52...Second screw shaft, P...Printing paper.

Claims (1)

[Scope of Utility Model Registration Claim] A transfer cylinder and an impression cylinder that print the printing paper by passing the printing paper between both peripheral surfaces, and an impression cylinder that prints the printing paper discharged from between the transfer cylinder and the impression cylinder. A pair of printing paper holding guide rollers are arranged in the direction of the generatrix of the same circumferential surface to press against the circumferential surface, and a pair of printing paper holding guide rollers are arranged in the ejection direction of the printing paper and arranged in the axial direction of the impression cylinder. a first screw shaft that connects and screws together the pair of printed paper discharge presser rollers, one of the pair of printed paper press guide rollers, and one of the pair of printed paper discharge press rollers; , a second screw shaft that connects and screws together the other of the pair of printing paper holding guide rollers and the other of the pair of printing paper discharge holding rollers; and a second screw shaft arranged in the printing paper ejection direction. a cylindrical paper ejection roller that is paired with the printing paper ejection presser roller; a pair of paper ejection rings that eject and convey the paper while curving the edges; first and second driving screw shafts that connect and screw one and the other of the pair of paper ejection rings, respectively; first and second rotation transmitting means for respectively transmitting the rotation of the drive screw shaft to the first screw shaft and the rotation of the second drive screw shaft to the second screw shaft; What is claimed is: 1. A paper ejection roller system position adjustment device for an offset printing press, comprising a handle shaft for selectively rotating one of the rollers.