JP2016203519A - Roller unit for printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller unit for a printer which allows heat generation of a swinging roller which performs reciprocatory movement to be reduced.SOLUTION: A driving roller 22 is joined, with a belt 24, to a plurality of swinging rollers 23 which can be reciprocatorily moved. The swinging rollers 23 have a shaft 41, a roller surface 42 formed in the shaft 41, an inner tube 43 fitted to the shaft 41, and an outer tube 44 fitted to the inner tube 43. The inner tube 43 of the swinging roller 23 can be moved and cannot be rotated in a shaft direction relative to the shaft 41. The outer tube 44 of the swinging roller 23 cannot be moved and cannot be rotated in the shaft direction relative to the inner tube 43.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a roller unit for a printing press, and more particularly to a roller unit for a printing press suitable for forming a plurality of kneading rollers.

  In the printing press, various rollers such as an ink fountain roller, an ink calling roller, a plurality of ink kneading rollers, one or a plurality of ink forming rollers, a water source roller, and a water applying roller are used. Among these rollers, for example, some of the ink kneading rollers are required to be swing rollers that reciprocate in addition to rotation. Patent Document 1 discloses that such a swing roller is driven by a motor.

JP 2004-58331 A

  In the case of a oscillating roller, oil lubrication is usually used. However, in addition to rotation, reciprocation is also performed, so that there is a problem that heat generation is large.

  An object of the present invention is to provide a roller unit for a printing press that can reduce the heat generation of a swing roller that performs reciprocal movement.

  A roller unit for a printing press according to the present invention includes a shaft driven by a motor and a driving roller having a roller surface formed on the shaft, a shaft, a roller surface formed on the shaft, and at least one inner cylinder fitted on the shaft. And at least one outer cylinder fitted to at least one inner cylinder, and capable of reciprocating at least one swing roller, a belt for coupling the drive roller and the outer cylinder of the swing roller, and a swing roller And a bearing device having a rolling bearing that rotatably supports the outer cylinder, and the inner cylinder of the oscillating roller is axially movable and non-rotatable with respect to the axis of the oscillating roller, The outer cylinder of the oscillating roller is characterized in that it cannot move in the axial direction and cannot rotate with respect to the inner cylinder of the oscillating roller.

  According to this roller unit for a printing press, the driving roller and the swinging roller are coupled with each other by a belt, and the swinging roller is supported by the rolling bearing, so that heat generated by the rotation is suppressed, and the swinging roller Since the axial movement of the inner cylinder with respect to the shaft is slow, grease lubrication is possible, oil lubrication is unnecessary, and heat generation can be significantly suppressed.

  At least one key groove extending in the axial direction is formed in the shaft of the swing roller, and at least one key fits in the inner cylinder of the swing roller so as to be axially movable in the at least one key groove. The key may be fixed.

  The shaft of the swing roller may be a ball spline shaft, and the inner cylinder of the swing roller may be a ball spline nut that holds a plurality of balls between the shaft.

  The reciprocating movement (axial movement) of the oscillating roller is performed by, for example, a cam groove provided on the axis of the oscillating roller and a cam follower engaged with the cam groove.

  According to the printing press roller unit of the present invention, as described above, heat generation can be significantly suppressed without oil lubrication.

FIG. 1 is a side view of a roller unit for a printing press showing an embodiment of the present invention. FIG. 2 is a front view of FIG. FIG. 3 is a cross-sectional view of the main part of FIG. FIG. 4 is a perspective view showing another embodiment of the swing roller. FIG. 5 is a side view showing an ink supply portion of a printing press as an example of an application target of the printing press roller unit of the present invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 5 shows the main part of the printing machine. The printing machine (1) prints on a can, paper, etc. by transferring ink from the printing cylinder (2) provided with a printing plate and the printing cylinder (2). A blanket cylinder (3) is provided, and an ink supply device (4) for supplying ink to the plate cylinder (2) is provided.

  The ink supply device (4) has an ink fountain (11), an ink fountain roller (12), an ink call roller (13), an ink kneading roller unit (14), an ink form roller unit (15), etc. as components. doing.

  The ink in the ink fountain (11) is supplied to the ink passage formed between the ink fountain (11) and the ink fountain roller (12), and the ink amount is adjusted by the ink call roller (13), and the ink kneading is performed. It is supplied to the plate of the plate cylinder (2) through the roller unit (14) and the ink form roller unit (15).

  The roller unit (20) for a printing press according to the present invention is suitable for an ink kneading roller unit (14). As shown in FIGS. 1 to 3, a driving roller (22) driven by a motor (21). A plurality (three in the figure) of a swing roller (23) capable of reciprocating movement, a drive roller (22), a belt (24) wound around the plurality of swing rollers (23), and a belt (24 ), And a bearing device (27) that rotatably supports the drive roller (22) and the plurality of swing rollers (23).

  The printing press roller unit (20) is supported by a machine frame (28) which is a fixed member.

  The drive roller (22) includes a shaft (31) coupled to the motor (21) via the clutch (29), and a large diameter portion (roller surface) integrally formed in the middle of the shaft (31) ( 32) and a belt winding part (33) formed integrally near the motor side end of the shaft (31).

  The swing roller (23) includes a shaft (41) arranged in parallel to the shaft (31) of the drive roller (22), and a large-diameter portion (roller surface) formed integrally in the middle of the shaft (41). (42), the inner cylinder (43) fitted to the outer circumference of the shaft (41) at a position corresponding to the belt winding portion (33) of the drive roller (22), and the outer circumference of the inner cylinder (43). The outer cylinder (44) and the large diameter part (45) having a cam groove (46) corresponding to the cam follower (30) formed integrally with the end of the shaft (41) on the side close to the motor (21) And have.

  The inner cylinder (43) and the outer cylinder (44) are also arranged near the end of the shaft (41) on the side far from the motor (21).

  The shaft (41) and the inner cylinder (43) are coupled by a key (47). The key (47) is fixed in the key groove (43a) of the inner cylinder (43). The axial length of the keyway (41a) of the shaft (41) is larger than the axial length of the key (47). As a result, the shaft (41) and the inner cylinder (43) are relatively movable in the axial direction, and rotate integrally.

  The inner cylinder (43) is fitted into the outer cylinder (44) with an interference fit, so that the inner cylinder (43) and the outer cylinder (44) cannot move relative to each other in the axial direction and are integrated. It is designed to rotate.

  The cam groove (46) has a closed loop shape that moves in the axial direction along the outer periphery of the large diameter portion (45) and returns to the original position. The cam follower (30) is supported by the machine casing (28).

  The bearing device (27) includes a ball bearing (rolling bearing) (51) that supports both ends of the drive roller (22), and an outer cylinder (44) disposed at both ends of the swing roller (23), respectively. And a pair of ball bearings (rolling bearings) (52) to be supported.

  The ball bearing (51) supporting the drive roller (22) has an outer ring (51a) fixed to the machine frame (28) and an inner ring (51b) fixed to the outer peripheral surface of the shaft (31). The pair of ball bearings (52) supporting the swing roller (23) has an outer ring (52a) fixed to the machine frame (28) and an inner ring (52b) fixed to the outer peripheral surface of the outer cylinder (44). Has been.

  According to the above roller unit (20) for the printing press, the drive roller (22) and the swing roller (23) are coupled by the belt (24), so there is no need for power transmission by a gear, and heat generation is suppressed. It is done. Further, the heat generated by the rotation can be suppressed by the swing roller (23) being rotatably supported by the ball bearing (52). The axial movement of the swing roller (23) relative to the shaft (41) of the inner cylinder (43) is not accompanied by rotation, so that heat generation due to the axial movement is also suppressed. Since the movement in the axial direction is low speed, it is possible to use grease lubrication, and since the rotation is supported by the rolling bearing (52), oil lubrication is unnecessary and heat generation can be significantly suppressed.

  In the above, the key (47) is a separate member, but may be provided integrally with the inner cylinder (43). Further, instead of the key (47), the shaft (41) may be a spline shaft or a serration shaft, and a plurality of axial grooves that fit into the shaft (41) may be provided in the inner cylinder (43). Further, the inner cylinder (43) and the outer cylinder (44) may be coupled with a key.

  Further, as shown in FIG. 4, the shaft (41) and the inner cylinder (43) of the swing roller (23) are provided with a ball spline shaft (the above-described shaft (41)) provided with a plurality of axial grooves (61a). )) (61), a ball passage (63a) formed between a plurality of balls (62) rolling in an axial groove (61a), and a ball spline shaft (61) and formed inside A ball spline having a ball spline nut (corresponding to the inner cylinder (43)) (63) having a ball return passage (63b) formed may be applied.

  The printing object of the printing machine may be paper or a can, such as an ink fountain (11), an ink fountain roller (12), an ink call roller (13), an ink form roller unit (15), etc. The constituent members of the ink supply device (4) can have various configurations. The printing press roller unit (20) can also be applied to roller units other than the ink kneading roller unit (14) including a swing roller. The number of the oscillating rollers (23) may be one or a plurality other than three.

(20): Roller unit for printing press, (21): Motor, (22) Drive roller, (23): Swing roller, (24): Belt, (27): Bearing device, (30): Cam follower, (31): Shaft, (32): Large diameter part (roller surface), (41): Shaft, (41a): Key groove, (42): Large diameter part (roller surface), (43): Inner cylinder, (43a): Key groove, (44): Outer cylinder, (46): Cam groove, (47): Key, (52): Ball bearing (rolling bearing), (61): Ball spline shaft, (62): Ball, (63): Ball spline nut

Claims (3)

A shaft driven by a motor and a driving roller having a roller surface formed on the shaft, a shaft, a roller surface formed on the shaft, at least one inner cylinder fitted on the shaft, and at least one inner cylinder At least one oscillating roller having at least one outer cylinder and reciprocatingly movable, a belt that couples the driving roller and the outer cylinder of the oscillating roller, and a roller that rotatably supports the outer cylinder of the oscillating roller A bearing device having a bearing,
The inner cylinder of the oscillating roller is axially movable and non-rotatable with respect to the axis of the oscillating roller, and the outer cylinder of the oscillating roller is not axially movable with respect to the inner cylinder of the oscillating roller. A roller unit for a printing press, which is capable of being rotated and cannot be rotated.   At least one key groove extending in the axial direction is formed in the shaft of the swing roller, and at least one key fits in the inner cylinder of the swing roller so as to be axially movable in the at least one key groove. 2. A roller unit for a printing press according to claim 1, wherein the key is fixed.   2. The printing press according to claim 1, wherein the shaft of the swing roller is a ball spline shaft, and the inner cylinder of the swing roller is a ball spline nut holding a plurality of balls between the shaft. Roller unit.

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