JPH0634137Y2 - Printing pressure adjustment device for number printing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a printing pressure adjusting device capable of easily and quickly adjusting printing pressure which is a gap between an impression cylinder and a character ring of a number printing press.

<Prior Art> A number printing machine prints serial numbers and symbols on printed materials such as securities, various forms, and banknotes. FIG. 3 shows a schematic structure of a conventional number printing machine and FIG. As shown in FIG. 4, the mount ring 103 slidably attached to the number shaft 101 via the key 102 includes a mounting cap 104.
Is fixed at any position in the longitudinal direction of the number shaft 101. On the outer peripheral surface of this mount ring 103, a numbering device 105
A dovetail 108, which slidably engages with a dovetail groove 107 formed in the frame 106 of the frame 106, is provided concentrically with the number shaft 101, and the number device 105 is mounted by a presser bolt 109 via a presser foot 110 and a mount ring 103. It is fixed at an arbitrary position on the outer peripheral surface of the. Around the numbered shaft 101, an impression cylinder 112 that rotates in synchronization with the numbered shaft 101 to pass a printed material (not shown) between the numbered wheel 105 and the wheel 111 of the number 105 is printed. Each time the numbering roller 101 of the inking device 114 for supplying the ink 113 for printing and the numbering shaft 101 make one rotation, the swing arm 116 of the numbering device 105
And a cam 117 for kicking the wheel to intermittently turn the wheel 111.

Therefore, the printing ink 113 is applied from the depositing roller 115 to the character wheel 111 by the inking device 114, and the character wheel 111 and the impression cylinder 112 are applied.
The character symbol of the character circle 111 is printed on the printed matter (not shown) passing between and.

Usually, in the number printing machine, the character ring 111 and the impression cylinder are made of metal, and the gap that serves as the printing pressure requires a delicate adjustment as compared with general offset printing. For example, if the printing pressure is too high, the printed matter will be flawed or punched out, and if the printing pressure is too low, the ink adhesion will be weak and the characters and symbols to be printed will be blurred.

Therefore, conventionally, a shim 1108 is provided between the mount ring 103 and the frame 106 of the numbering device 105, or the dovetail 108 formed on the outer peripheral surface of the mount ring 103 and the frame 106 of the numbering device 105 are engraved. The printing pressure is finely adjusted by sliding it together with the dovetail groove 107.

<Problems to be solved by the invention> It is usual that a plurality of numbering devices are attached to the numbering shaft of a numbering printing machine, and the printing pressure of these numbering devices is forwarded by using a shim or sliding. Adjusting equally requires a very high degree of skill and requires a great deal of time,
This leads to a decrease in operating rate. Further, because of this, the dimensional accuracy of the number shaft, the mount ring, the frame of the numbering device, and the like must be maximized, and the cost of parts must be increased.

<Means for Solving Problems> A printing pressure adjusting device for a number printing press according to the present invention includes a mount ring slidably fixed to the number axis along the number axis and an outer peripheral surface of the mount ring. In a number printing machine having a numbering device slidably engaged along the fixing ring and fixed to the mount ring, flexure-promoting grooves that are annular and concentric with the numbering shaft are formed on both end surfaces of the mount ring. A plurality of turnbuckles for radially bending and deforming the outer peripheral surface of the mount ring are radially arranged in these bending promoting grooves.

<Operation> When the turnbuckle is rotated in one direction, the mount buckle is flexibly deformed so that the outer peripheral side of the flexure promoting groove is pushed outward in the radial direction, and the printing pressure between the numbering device and the impression cylinder is increased.

On the contrary, when the turnbuckle is rotated in the opposite direction, the mount ring is flexibly deformed so that the outer peripheral side of the flexure promoting groove is drawn inward in the radial direction, and the printing pressure between the numbering device and the impression cylinder is reduced.

<Embodiment> As shown in FIG. 1 showing the cross-sectional structure of the main part and FIG. 2 showing the cross-sectional view taken along the line II-II thereof in one embodiment of the printing pressure adjusting device of the number printing press according to the present invention, a cylinder A mount ring 13 slidable on the numbered shaft 11 via a key 12 is integrally fitted to the outer periphery of the numbered shaft 11 having a shape by a fixing bolt 15 via a mounting cap 14. On the outer peripheral surface of the ring 13, there is formed a dovetail 19 which is engraved on the frame 17 of the numbering device 16 and which is slidably engageable with the dovetail groove 18 and concentric with the numbering shaft 11. The number device 16 is fixed on the mount ring 13 via the presser foot 21 by the presser bolt 20 screwed into the frame 17, and a cam (not shown) moves the swing arm 22 of the number device 16 along with the drive rotation of the number shaft 11. The wheel 23 is adapted to rotate intermittently each time it is kicked.

On the other hand, flexure promoting grooves 24 concentric with the number shaft 11 are formed on both end surfaces of the mount ring 13 toward the center of the mount ring 13 in the width direction (left and right direction in FIG. 2). The seat portion 25 formed on the inner side in the radial direction of the mount ring 13 and the bending portion 26 formed on the outer side in the radial direction respectively have left-hand screw members radially around the number shaft 11.
27 and a right-handed screw member 28 are screwed in a straight line, and the left-handed screw member 27 and the right-handed screw member 28 are screwed to a nut ring 29 located in the flexure promoting groove 24. Then, a set screw 30 for fixing the left screw member 27 and the right screw member 28 to the mount ring 13 is attached to the seat portion 25 and the bending portion 26, respectively.
The rotation of the right-hand screw member 28 is suppressed.

These left screw member 27, right screw member 28 and nut ring
The turnbuckle composed of 29 etc. can be arbitrarily set with respect to the mounting interval and the number of mounting in the bending promoting groove 24, but it is necessary to deform only the bending part 26 without deforming the seat part 25, It is desirable that the thickness of the flexible portion 26 (the height in the vertical direction in the drawing) be smaller than that of the seat portion 25. Further, the left-hand screw member 27 is attached to the bending portion 26, and the right-hand screw member 28 is attached to the seat portion.
It may be attached to 25. In this embodiment, the left-hand thread member 27 and the right-hand thread member 28 are stepped two-step screws, and threads in the same direction are engraved, but a nut ring 29
It is also possible to set the threaded portion of the small diameter portion that is screwed to the seat and the threaded portion of the large diameter portion that is screwed to the seat portion 25 or the flexible portion 26 to be reverse threads, and to make each a single lead thread. You can

Therefore, by rotating the nut ring 29 in the vicinity of which the numbering device 16 is mounted in either forward or reverse direction using a wrench or the like (not shown), bending is performed so that the distance between the seat portion 25 and the bending portion 26 changes. The portion 26 elastically displaces radially outward or inward, and the distance from the center of the number shaft 11 to the tip of the ring 23 of the numbering device 16 changes. As a result, the printing pressure between the impression cylinder (not shown) and the character wheel 23 can be adjusted arbitrarily.

Since the other configurations are the same as those of the conventional number printing machine shown in FIGS. 3 and 4, description thereof will be omitted.

<Effect of the Invention> According to the printing pressure adjusting device of the number printing press of the present invention, the mounting ring is elastically deformed in the radial direction by using the turnbuckle so that the printing pressure between the impression cylinder and the character wheel is changed. The working time can be reduced to a fraction of the time or less compared to the conventional printing pressure adjustment method that uses shims or slides the mount ring and number frame, and expects a significant improvement in operating rate. You can

[Brief description of drawings]

FIG. 1 is a cutaway view showing a schematic structure of an embodiment of a printing pressure adjusting device for a number printing machine according to the present invention, FIG. 2 is a sectional view taken along the line II--II of FIG. A conceptual diagram showing an example, FIG. 4 is a front view thereof. In the figure, reference numeral 11 is a number shaft, 13 is a mount ring, and 16
Is a numbering device, 17 is a frame, 18 is a dovetail groove, 19 is a dovetail, 23 is a ring shape, 24 is a flexure promoting groove, 27 is a left-hand thread member, 28 is a right-hand thread member, 29 is a nut ring, and 30 is a set screw. is there.

Claims (1)

[Scope of utility model registration request] 1. A mount ring slidably fixed to the number axis along the number axis, and a number slidably engaged with and fixed to the mount ring along the outer peripheral surface of the mount ring. In a number printing machine having a container, each of the mount rings is formed with a bending-promoting groove concentric with the numbering shaft on both end surfaces thereof, and the outer peripheral surface of the mount ring is bent in the radial direction in these bending-promoting grooves. A printing pressure adjusting device characterized in that a plurality of turn buckles, each of which is deformed, are radially arranged.