JP2946234B2 - Printing roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

 The present invention relates to a printing roll.

[Prior art]

In offset printing presses, in order to equalize the ink and water film and eliminate printing defects, a method of swinging an inking roll or dampening roll that supplies ink or water to the plate cylinder in the axial direction has been adopted. The present inventor has invented a printing roll that is positively driven in the axial direction by a solenoid or an air cylinder, and has been disclosed in JP-A-62-32051 and JP-A-63-137.
47, and JP-A-1-28952.

[Problems to be solved by the invention]

Conventionally, when the print roll is driven by a solenoid in the axial direction, electrical wiring is required, and when driven by an air cylinder or oil cylinder, air pipes and oil pipes are required. It is not possible to drive in the axial direction only by
Depending on the type of printing machine, it may not be possible to take up enough space for wiring and piping.

[Object of the invention]

Therefore, an object of the present invention is to obtain a printing roll that can be swung in the axial direction by simply replacing an existing printing press.

Configuration of the Invention

The printing roll 18 according to the present invention meets the above-mentioned demands. (A) The support shaft 11 fixed to the printing press main body, the roll base 12 rotatably supported by the support shaft 11, and the first (B) The roll base 12 is movable in the direction of the axis O-O 'of the support shaft, and the first base 13 and the second base 14 Is spindle 11
(C) The roll base body 12 and the first rotating body 13 rotate together with them to form a slider device 15 that translates in the axial direction OO '. (D) The roll base 12 and the second rotating body 14 are connected to each other by using the support shaft 11 as a rotation axis, and the roll base 12 and the second rotating body 14
(E) The first rotating body 13 and the second rotating body 14 are opposed to each other, and a supporting shaft is Shaft core O-
Bevel gears 36 and 37 with O 'as the center of rotation are mounted,
The bevel gears 36 and 37 are adapted to rotate integrally with the first rotating body 13 and the second rotating body 14, respectively. (F) Supports are provided between the bevel gears 36 and 37. Axis 11
The support shaft 35 protrudes rotatably. The support shaft 35 penetrates the support shaft 11 at right angles to the axis O-O ', and both ends of the support shaft 35 protruding through the support shaft 35 have teeth. (G) The bevel gear 38 having a small number of teeth is provided on the bevel gear 36 of the first rotating body 13, and the bevel gear 39 having a large number of teeth is provided on the second rotating body 14. Bevel gear 37
(H) These bevel gears 36, 36, 38, and 39 constitute a differential gear train, and a transmission 17 that changes the rotation speed of the first rotating body 13 and the second rotating body 14 Is constituted. Hereinafter, a specific description will be given with reference to the illustrated embodiment. The roll body 12 is made of a metal pipe, and its axial direction OO ′ is divided by several cylindrical rotating bodies 19 and 20 joined to its inner peripheral surface. Cylindrical rotor
19/20 is a shaft center O-
It is supported by a support shaft 11 so as to be rotatable around O 'and movable in the axial direction. FIG. 1 shows one end of the printing roll 18, and the outer cylindrical rotating body 19 and the second cylindrical rotating body 20 from the end are formed by the roll base 12 and the axis OO '. It is also connected by the same metal pipe 23, and between them a roll base
12 and metal pipe 23 are tripled. On the metal pipe 23, two pins 24 and 25 projecting from the inner peripheral surface toward the axis OO 'of the roll base 12 are screwed at regular intervals in the axis direction OO'. Has been worn,
Rolls 26 and 27 are rotatably mounted on the protruding portions of the pins 24 and 25, respectively. A gear 28 for rotationally driving the cylindrical rotary member 19 is screwed to the outer side surface of the outer cylindrical rotary member 19 with screws 29 and 30. The first rotating body 13 and the second rotating body 14 have a generally cylindrical shape,
Bearings 31 and 32 rotatably support the shaft 11 between the cylindrical rotating bodies 19 and 20, respectively, and the movement in the axial direction OO 'is stopped by slat rings (not shown). . On the outer peripheral surface of the first rotating body 13, grooves 33 into which the rolls 26 are loosely fitted are cut in parallel with the axis OO 'of the roll base body. Make up 15. A cylindrical cam groove 34 into which the roll 27 is loosely fitted is cut out on the outer peripheral surface of the second rotating body 14, and the roll 27 and the cam groove 34 are formed.
Constitute the three-dimensional cam device 16. At a portion between the first rotating body 13 and the second rotating body 14 of the support shaft 11, a thin support shaft 35 whose axis is orthogonal to the axis OO ′ of the support shaft 11 is provided.
Are rotatably mounted, and bevel gears 38 and 39 having different numbers of teeth are fixed to both ends thereof so as to rotate integrally with the support shaft 35. A bevel gear 36 meshing with a bevel gear 38 having a small number of teeth is provided on a side end face of the first rotating body 13 facing the support shaft 35, and the first rotating body 14
A bevel gear 37 meshing with a bevel gear 39 having a large number of teeth is joined to a side end face facing the support shaft 35 of the roll shaft 35 in a direction of rotation about the axis O-O 'of the roll base 12, and the bevel gear 37
The bevel gear 36 has a greater number of teeth than the bevel gear 36, and the differential gear train constituted by these bevel gears 36, 37, 38 and 39 constitutes the transmission 17.

[Action]

When the support shaft 11 is fixed to the frame of the printing press, the print roll 18 is attached, and the gear 28 is driven to rotate, the cylindrical rotary members 19 and 20 are rotated.
The roll base 12 and the metal pipe 23 rotate integrally with the gear 28, but the pin 24 screwed to the metal pipe 23
Reciprocates on the side wall of the groove 33 via the roll 26, so that the first rotating body 13 rotates integrally with the metal pipe 23 and the roll base 12, and the rotation rotates the support shaft 35 and the bevel gear 37 from the bevel gear 38. Through the bevel gear 39, and the second rotating body 14 integrated with the gear 39 also starts rotating. At this time, the rotation speed of the first rotator 13 is shifted through the transmission 17 and the rotation speeds (each speed) of the second rotator 14 and the first rotator 13 become inconsistent. Thus, the cam groove 34 of the second rotating body 14 presses the pin 25 via the roll 27 in the axial direction OO ′ of the roll base 12. At this time, the metal pipe 23 on which the pin 25 is screwed is movable in the axial direction OO ′, and is integrated with the roll base 12 and the cylindrical rotating bodies 19 and 20. When it moves in the axial direction OO ', the roll base 12 and the cylindrical rotating bodies 19 and 20 also move. The pin 24 is movable in the axial direction OO 'in the groove 33 and does not hinder the movement of the metal pipe 23 and the roll base 12 in the axial direction OO'. One rotating body 13
When the difference in the number of rotations between the second rotating body 14 and the second rotating body 14 is one rotation, the metal pipe 23 and the roll
12 reciprocates left and right in the axial direction OO '. Thus, if the roll base 12 is rotationally driven, the roll base 12 will swing independently by the pitch of the cam groove 34 in the axial direction OO '. As described above, the print roll 18 according to the present invention swings to the left and right by itself when rotated, and does not require any special power source for swinging the print roll, and does not require piping or wiring work with the power source. .

Embodiment

FIG. 1 illustrates one embodiment of the present invention, in which a slider device 15, a three-dimensional cam device 16, and a transmission
Other mechanisms can be employed for 17. For example, the slider device 15 attaches a groove 33 shown to the metal pipe 23 and attaches a pin 24 or a roll 26 loosely fitted to the metal pipe 23 to the first position.
A groove 33 ′ corresponding to the groove 33 shown in FIG. 2 may be formed in the metal pipe 23,
The roll 26 'may be loosely fitted over the grooves 33, 33' or, as shown in FIGS. 3 and 4, either the metal pipe 23 or the first rotating body 13 may be used. Axial direction O-
A groove 33 "parallel to O 'may be provided, and a key 26" to be loosely fitted in the groove 33 "may be attached to the corresponding other first rotating body 13 or metal pipe 23. The three-dimensional cam device 16 is provided with a cylindrical cam groove 34 shown in the figure on the peripheral surface of the metal pipe 23 and a pin 25 or a roll 27
Can be constructed as an opposite cam mechanism attached to the second rotating body 14. Further, as shown in FIG. 5, the cylindrical cam 34, which is a positive cam, is replaced with an end cam 49, and one end is supported by a ring 49. The cylindrical rotary body 20 may be elastically urged via a bearing 41 by a coil spring 42 attached to the pin 11, thereby pressing the pin 25 or the roll 27 against the end face cam 40, in which case, as described above, An opposite cam mechanism in which the cam groove 40 is attached to the metal pipe 23 and the pin 25 and the roll 27 are attached to the second rotating body 14 can also be used. The bearings 21, 22, 31 and 32 are not always necessary, and a lubricant such as grease is applied between the
13.14.19.20 can be rotatably supported, and the metal pipe 23 is for attaching the pins 24 and 25 to the roll base 12, so it can be replaced with a shaped steel.・
25 can be directly attached to the roll base 12. Further, in the embodiment, the printing roll 18 is rotationally driven by the gear 28.However, in a printing machine, several printing rolls are in rolling contact, and if one of the rolls in contact with the rolling is rotationally driven, the printing roll 18 is rotated. The gear 28 is not a requirement of the present invention because the other roll is driven to rotate by the roll. That is, in the printing roll 18 without the gear 28, the roll base 12 is driven to rotate by the other printing rolls that come into contact with the roller 28, and the first rotating body 13 rotates and the difference in rotation speed between the first rotating body 13 and the second rotating body 14. Then, the roll base 12 is driven to reciprocate left and right in the axial direction OO 'by the cam rotating integrally with the second rotating body 14. Further, the printing roll 18 according to the present invention includes an ink form roll, a distributor roll, an ink kneading roll,
It is used for a rider roll, a dump form roll, a dumping roll, and the like, and is not limited to a mounting portion of the printing press.

【The invention's effect】

As described above, the printing roll 18 according to the present invention can be mounted on a conventional printing press because the printing roll 18 swings left and right alone in the axial direction OO 'just by being driven to rotate similarly to the conventional printing roll. This is particularly advantageous for a printing machine of a model which does not have a space for providing a driving means for swinging the printing roll right and left. (2) Since the support shaft 11 is also used as a support member for the intermediate bevel gears 38 and 39, the support shaft 11 and the roll base 12 (or the metal pipe 23)
Even if the space between them is small,
・ 39 spindles 35 can be made thicker, and the first rotating body 13
When it is desired to increase the number of intermediate gears (38, 39) that transmit rotation from the first rotating body 14 to the second rotating body 14, no problem occurs, and therefore,
The present invention is not hindered by the thickness of the roll base 12 or the metal pipe 23.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional front view of a main part of a printing roll according to an embodiment of the present invention, and FIGS. 2 and 3 are cross-sectional views of a slider unit of a printing roll according to another embodiment of the present invention. FIG. 4 is a cross-sectional side view of the slider device portion shown in FIG. 3, and FIG. 5 is a cross-sectional front view of the print roll device portion of the printing roll according to another embodiment of the present invention. 11 ... shaft, 12 ... roll body, 13 ... 1st rotating body, 14 ... 2nd rotating body, 15 ... slider device, 16 ... cam device, 17 ... transmission, 18 ... printing Rolls, 19 ・ 20… Cylindrical rotating body, 21 ・ 22… Bearing, 23… Metal pipe, 24 ・ 25 ……
Pin, 26/27 Roll, 28 Gear, 29/30 Screw, 31/32 Bearing, 33 Groove, 34 Cylindrical cam, 35 Shaft, 36/37 Bevel gears, 38 and 39 bevel gears, 40 bevel cams, 41 bearings, 42 coil springs, 49 rings.

Claims (1)

(57) [Claims] 1. A spindle 11 fixed to a printing press main body,
Roll base 12 and first rotary body rotatably supported on support shaft 11
(B) The roll base 12 is movable in the axial direction OO ′ of the support shaft, and the first rotary body 13 and the second rotary body Axis 11
(C) The roll base body 12 and the first rotating body 13 rotate together with them to form a slider device 15 that translates in the axial direction OO '. (D) The roll base 12 and the second rotating body 14 are supported by the support shaft 11 as a rotation axis, and the roll base 12 and the second rotating body 14 are relatively supported by the support shaft 11.
(E) The first rotating body 13 and the second rotating body 14 are opposed to each other, and a supporting shaft is Shaft core O-
Bevel gears 36 and 37 with O 'as the center of rotation are mounted,
The bevel gears 36 and 37 are adapted to rotate integrally with the first rotating body 13 and the second rotating body 14, respectively. (F) Supports are provided between the bevel gears 36 and 37. Axis 11
The support shaft 35 protrudes rotatably. The support shaft 35 penetrates the support shaft 11 at right angles to the axis O-O ', and both ends of the support shaft 35 protruding through the support shaft 35 have teeth. (G) The bevel gear 38 having a small number of teeth is provided on the bevel gear 36 of the first rotating body 13, and the bevel gear 39 having a large number of teeth is provided on the second rotating body 14. Bevel gear 37
(H) These bevel gears 36, 36, 38, and 39 constitute a differential gear train, and a transmission 17 that changes the rotation speed of the first rotating body 13 and the second rotating body 14 A printing roll.