JPH0737867Y2 - Plate cylinder equipment of printing machine - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a plate cylinder device for a printing machine.

[0002]

2. Description of the Related Art In a printing machine that transfers an ink image of a plate mounted on the outside of a plate cylinder to a blanket cylinder, and transfers the ink image of the blanket cylinder to paper inserted between the blanket cylinder and the impression cylinder, The rotation of the impression cylinder is transmitted to the blanket cylinder, and is transmitted from the blanket cylinder to the plate cylinder.

In such a printing machine as described above, in order to print a pattern on a paper at an accurate position, the plate is adjusted upside down before printing is started. As the up-and-down adjustment mechanism, the gear provided on the blanket cylinder is used as a helical gear, and the adjusting helical gear meshed with this helical gear is provided coaxially with the plate cylinder. The one in which the rotation is transmitted to the plate cylinder has been conventionally known (Shokai Sho 61-40238).
Issue).

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, in a plate cylinder device for adjusting the top and bottom of a plate by using a helical gear provided on the blanket cylinder, an eccentric bearing for supporting the blanket cylinder is rotated to move the blanket cylinder to the plate cylinder. And the pressure between both cylinders is reduced, the clearance between the engagement parts of the blanket cylinder's helical gear and the adjusting helical gear increases, and the gap between the helical gears is relatively large for pressure adjustment. Since backlash is required, there is a problem that the plate top-bottom adjustment accuracy is poor.

The present invention has a technical problem to solve the above problems and to improve the vertical adjustment accuracy.

[0006]

In order to solve the above-mentioned problems, in the present invention, a plate supporting shell is provided on the outside of a supporting cylinder in which a small diameter shaft portion at both ends is rotatably supported by a pair of frames. The support cylinder is fitted with an axial insertion hole that opens at the end surface of the small diameter shaft portion and a radial guide hole that opens at the outer peripheral surface of the support cylinder and communicates with the insertion hole. An adjustment shaft slidably and rotatably inserted into the guide shaft is connected to the shell through a connecting member inserted in the guide hole with a margin, and the end of the small diameter shaft portion meshes with the gear of the blanket cylinder. A cylindrical gear is fixed, and a helical gear is provided on the inner peripheral surface of the cylindrical gear.The helical gear that meshes with the helical gear is fitted on the outside of the adjustment shaft to prevent rotation and move axially. It can be freely installed and moved to move this helical gear in the axial direction. It was adopted a structure formed by a mechanism.

[0007]

With the above construction, when the helical gear is moved in the axial direction by the moving mechanism, the helical gear is rotated while being axially moved by the engagement with the helical teeth, and the rotation causes the adjustment shaft to move. Rotate. Since the adjusting shaft and the shell are connected by the connecting member, the shell rotates with respect to the support cylinder by the rotation of the adjusting shaft, and the plate mounted on the outer side of the shell can be adjusted upside down.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, an impression cylinder 2, a blanket cylinder 3 and a plate cylinder 4 are arranged between a pair of frames 1 and 1, and the rotation of the impression cylinder 2 is carried by a gear 5 and a blanket attached to the end of the impression cylinder. It is transmitted to the blanket cylinder 3 by meshing with a gear 6 attached to the end of the cylinder 3.

As shown in FIGS. 2 to 4, the plate cylinder 4 is composed of a support cylinder 7 and a first shell 8 and a second shell 9 fitted around the support cylinder 7. The support cylinder 7 has a pair of small-diameter shaft portions 10 at both ends, and the small-diameter shaft portions 10 are rotatably supported by the frame 1. Gears 11 and 12 are attached to the ends of the pair of small-diameter shaft portions 10, respectively, and one gear 12 of the pair of gears 11 and 12 meshes with the gear 6 of the blanket cylinder 3 to rotate the blanket cylinder 3. Is transmitted. Further, each of the pair of gears 11 and 12 is formed in a cylindrical shape and has a helical tooth 13 on its inner peripheral surface.
Are formed.

At both ends of the support cylinder 7, a small diameter shaft portion 10 is provided.
Insertion holes 14, 14 on the axis of the support body 7, and a radial guide hole 15, which opens at the outer peripheral surface of the support cylinder 7 and communicates with the insertion hole 14,
15 is formed, and among the pair of adjusting shafts 16 and 16 inserted into the respective insertion holes 14, one adjusting shaft 16 and the first shell 8 and the other adjusting shaft 16 and the second shell 9 are the guide holes. They are connected to each other via a connecting member 17 inserted in 15.

As shown in FIGS. 2 and 3, there is a margin between the guide hole 15 and the connecting member 17 in the radial direction of the guide hole, and the adjusting shaft 16 is axially moved in the marginal range. It can be slid and rotated.

Each of the adjusting shafts 16 and 16 is independently rotated by the up-and-down adjusting mechanism 20, and the left-right adjusting mechanism 4 is rotated.
Moved axially by 0.

The adjusting mechanism will be described below. Since the up-and-down adjustment mechanism 20 associated with the pair of adjustment shafts 16 has the same configuration, and the left-right adjustment mechanism 40 also has the same configuration, only one adjustment mechanism will be described below, and the other adjustment mechanism will be described. The same reference numerals are given and the description is omitted.

As shown in FIG. 4, the up-and-down adjusting mechanism 20 is provided with a helical gear 21 that engages with helical teeth 13 of gears 11 and 12 provided at the end of the small-diameter shaft 10 outside the adjusting shaft 16. , The support cylinder 22 provided at the end of the helical gear 21
Of the adjusting shaft 16 and the outer peripheral surface of the adjusting shaft 16 to prevent the above-mentioned helical gear 21 from rotating with respect to the adjusting shaft 16 and movably support the helical gear 21 in the axial direction. It is designed to move in the axial direction by a mechanism.

In the moving mechanism, a bearing 25 is installed between the support cylinder 22 and a transmission cylinder 24 provided outside the support cylinder 22.
2, the transmission cylinder 24 is rotatably supported so as to move together in the axial direction, and the bifurcated member 26 is fitted on the outer side of the transmission cylinder 24 so that the transmission cylinder 24 and the bifurcated member 26 are axially moved. The two forked members 26 are engaged with each other so as to move together, and the ends of the bifurcated members 26 are inserted into the long holes 28 of the housing 27 attached to the frame 1 to prevent rotation.

A screw hole 29 is formed in the bifurcated member 26, a worm wheel 31 is attached to the end of a screw rod 30 screwed into the screw hole 29, and the worm wheel 31 is rotated by the end plate of the housing 27. The worm 32, which is freely supported and meshed with the worm wheel 31, is rotated by a vertical register adjusting motor (not shown).

On the other hand, in the left-right adjusting mechanism 40, a bearing 42 is arranged between the end of the adjusting shaft 16 and a transmission cylinder 41 provided outside the adjusting shaft 16 so that the transmission cylinder 41 can rotate with respect to the adjusting shaft 16. , And a screw 43 is formed on the inner circumference of a cylindrical shaft portion provided at the end of the transmission cylinder 41 so as to move together in the axial direction, and an adjusting screw 44 is screwed into this screw 43. .
Further, a worm wheel 45 is attached to the outside of the adjusting screw 44, the worm wheel 45 is rotatably supported by the end plate of the housing 27, and the worm 46 meshed with the worm wheel 45 is rotated by a left and right register adjusting motor (not shown). Is done.

The plate cylinder device shown in the embodiment has the above-mentioned structure, and when printing, the first shell 8 and the second shell 9 are used.
The plate is attached to the outer side of and the impression cylinder 2 shown in FIG. 1 is rotated. Now, when the impression cylinder 2 is rotated, the rotation is the blanket cylinder 3
Is transmitted to the gear 12 of the small-diameter shaft portion 10 from the gear 6 of the blanket cylinder 3, so that the support cylinder 7 rotates. At this time, the helical teeth 13 of the gear 12 of the support cylinder 7 and the helical gear 21 mesh with each other, and the helical gear 21 and the adjustment shaft 16 are connected by the spline 23. 16 rotates, the 1st shell 8 and the 2nd shell 9 rotate at the same speed as the support cylinder 7, and printing can be performed with the plate attached to the outside of each shell 8,9.

In the printing, if the plate is displaced in the vertical direction, the vertical register adjusting motor is driven to perform the vertical adjustment of the plate.

Now, when the worm 32 is rotated by driving the up-and-down register adjusting motor, the worm wheel 31 interlocked with it rotates, and the screw rod 30 rotates together with the worm wheel 31. Therefore, the forked member 26 that engages with the screw rod 30 moves in the axial direction of the screw rod 30, and the transmission cylinder 24 also moves in the same direction. The transmission cylinder 24 and the helical gear 21 are interlocked so as to move together in the axial direction, and the helical gear 21 is the helical gear 1 of the gears 11 and 12.
3, the helical gear 21 is moved in the axial direction by the movement of the transmission cylinder 24, and thus the helical gear 13 is engaged.
Rotate along. The rotation is transmitted to the adjusting shaft 16 via the spline 23, and the adjusting shaft 16 and the first shell 8 or the second shell 9 are connected to each other, so that the first shaft
The shell 8 or the second shell 9 is rotated with respect to the support cylinder 7 so that the plate mounted on the outside of the shell can be aligned in the vertical direction.

When the left and right register adjusting motor is driven to rotate the worm 46, the worm wheel 45 meshing with the worm 46 rotates, and the adjusting screw 44 also rotates. Due to the rotation of the adjusting screw 44, the transmission cylinder 41 screw-engaged with the adjusting screw 44 moves in the axial direction. Since the transmission cylinder 41 and the adjusting shaft 16 are connected so as to move together in the axial direction, the transmission cylinder 4
The adjustment shaft 16 is moved in the axial direction by the movement of 1, and the adjustment shaft 16 and the first shell 8 or the second shell 9 are connected via the connecting member 17, so that the first shell 8
Alternatively, the second shell 9 moves in the axial direction of the support cylinder 7, and the outer plate can be registered in the left-right direction.

[0022]

As described above, according to the present invention, the helical gear is provided on the inner circumference of the cylindrical gear fixed to the small-diameter shaft portion of the support cylinder, and the helical gear meshing with the helical gear is axially moved by the moving device. By moving it to, the helical gear rotates while moving in the axial direction, and the rotation is transmitted to the shell via the adjustment shaft and the connecting member, so that the top and bottom of the plate mounted outside the shell can be adjusted. it can.

Further, since the helical gear is provided inside the cylindrical gear and both gears are provided coaxially, the size of the backlash formed between the two gears is determined by rotating the eccentric bearing and moving the blanket cylinder. However, the backlash can be as small as the normal backlash formed between the engaging portions of the gears, so that the plate can be positioned with extremely high accuracy.

Further, since the cylindrical gear and the helical gear are provided on the same axis, downsizing of the vertical adjustment mechanism can be achieved as compared with the vertical adjustment mechanism in which a pair of upward and downward helical gears are arranged in parallel. . Also, the cylindrical gear is
Rotation transmission of the plate support shell fitted to the outside of the support cylinder
Since it is used for both top and bottom adjustment, the plate cylinder device can be downsized.
In addition to being able to
It has a structure that provides a moving mechanism for the gear and its helical gear.
Therefore, while the support cylinder is supported by the frame,
Maintenance, easy maintenance
is there.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a plate cylinder device according to the present invention.

FIG. 2 is a sectional view of the plate cylinder support portion of the above.

FIG. 3 is an enlarged cross-sectional view of the left side portion of FIG.

FIG. 4 is an enlarged cross-sectional view of the right side portion of FIG.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

 1 frame 3 bracket body 6 gear 7 support body 8 first shell 10 small diameter shaft 12 cylindrical gear 13 helical tooth 14 insertion hole 15 guide hole 16 adjusting shaft 17 connecting member 21 helical gear

Claims (1)

[Scope of utility model registration request] 1. A shell for plate support is fitted on the outer side of a support cylinder whose small-diameter shaft portions are rotatably supported by a pair of frames, and an axial direction in which the end faces of the small-diameter shaft portions are opened in the support cylinder. And a guide hole in the radial direction which is opened on the outer peripheral surface of the support cylinder and communicates with the insertion hole, and an adjustment shaft and a shell which are slidably and rotatably inserted into the insertion hole. It is connected through a connecting member inserted in the guide hole with a margin, and a cylindrical gear that meshes with the gear of the blanket cylinder is fixed to the end of the small-diameter shaft portion, and a helical gear is attached to the inner peripheral surface of the cylindrical gear. Tooth is provided, a helical gear meshing with the helical gear is fitted on the outside of the adjusting shaft to prevent rotation, and is provided movably in the axial direction, with a moving mechanism for moving the helical gear in the axial direction. Consisting of plate cylinder device of printing machine.