Manufacturing container or tube from paper; or other manufacturi – Bending – Folding
Reexamination Certificate
2000-05-22
2002-06-04
Rada, Rinaldi I. (Department: 3721)
Manufacturing container or tube from paper; or other manufacturi
Bending
Folding
C493S425000, C493S479000, C493S356000, C493S432000
Reexamination Certificate
active
06398704
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an outside diameter adjuster for adjusting the outside diameter of a folding cylinder in accordance with the thicknesses of overlapped continuous papers in the folding cylinder of a folding portion of a rotary press for overlapping continuous papers printed in several printing sections and cutting and folding these continuous papers.
2. Description of the Related Art
An adjustment of the outside diameter of a folding cylinder in a folding portion of a rotary press in accordance with the thicknesses of overlapped continuous papers is well known as a means for setting produced folding binding to a preferable state irrespective of its thickness. For example, techniques described in Japanese Patents 2538925 (prior art 1), 2705922 (prior art 2) and 2788321 (prior art 3) are known.
The technique described in the prior art 1 is as follows. A sun gear has a rotating center common to that of a folding cylinder and can be rotated separately from the folding cylinder by selecting an aligning or unaligning state with the folding cylinder. The sun gear is engaged with a gear attached to a male screw shaft rotatably arranged near an inner circumferential face of the folding cylinder in parallel with an axis of the folding cylinder. The sun gear is rotated in the unaligning state with the folding cylinder so that the male screw shaft is rotated through the gear engaged with the sun gear. Thus, a slide base coupled to the male screw shaft by a screw is slid in parallel with the axis of the folding cylinder. A cam mechanism is constructed by an inclining groove arranged in the slide base and a cam follower inserted into the inclining groove. A slide plate attaching the cam follower thereto is slid in a direction perpendicular to a sliding direction of the slide base through the cam mechanism. One end of a thin plate-shaped member is connected to the slide plate and the other end of the thin plate-shaped member is connected to the folding cylinder. This thin plate-shaped member is curved by sliding the slide plate such that the thin plate-shaped member swells outside an outer circumferential face of the folding cylinder. The thin plate-shaped member also extends along the outer circumferential face of the folding cylinder by sliding the slide plate.
The technique described in the prior art 2 is as follows. A drive shaft has a rotating center common to that of a folding cylinder and is arranged in a hollow portion of a folding cylinder shaft so as to rotate separately from the folding cylinder by selecting an aligning or unaligning state with the folding cylinder. This drive shaft is rotated in the unaligning state with the folding cylinder through a drive gear attached to this drive shaft so that a female screw shaft is rotated. The female screw shaft is connected to the drive shaft through a pair of umbrella gears and is rotatably arranged along a radial direction of the folding cylinder. Further, a male screw shaft screw-coupled to the female screw shaft is moved in its axial direction by rotating the female screw shaft so that an operating shaft is angularly displaced. The operating shaft is connected to the male screw shaft through a link mechanism and is rotatably arranged near an inner circumferential face of the folding cylinder in parallel with an axis of the folding cylinder. A connecting link is connected to the operating shaft through an upper projection of the operating shaft and is arranged in the folding cylinder so as to move along an outer circumferential face of the folding cylinder. The connecting link is moved along the outer circumferential face of the folding cylinder by the angular displacement of the operating shaft. One end of a thin plate-shaped member is connected to this connecting link and the other end of the thin plate-shaped member is connected to the folding cylinder. The thin plate-shaped member is curved outside the outer circumferential face of the folding cylinder and extends along the outer circumferential face of the folding cylinder by moving the connecting link along the outer circumferential face of the folding cylinder.
The technique described in the prior art 3 is as follows. An adjusting ring has the same rotating center as the rotating center of a folding cylinder in which a folding jaw is arranged. The adjusting ring can be rotated integrally with the folding cylinder and is arranged in the folding cylinder so as to change a rotating phase. A rack is arranged on an outer circumferential side of the adjusting ring. A drive gear is engaged with the rack. The drive gear is attached to an eccentric shaft rotatably arranged near an inner circumferential face of the folding cylinder in parallel with an axis of the folding cylinder. An adjusting gear is attached to the output shaft of a motor arranged within the folding cylinder and is engaged with an inner gear series of the adjusting ring. The eccentric shaft is angularly displaced through the drive gear engaged with the rack of the adjusting ring by changing the rotating phase of the adjusting ring with respect to the folding cylinder through the adjusting gear. Further, the outside face of an arc member is covered with a resilient lining. The arc member is arranged such that an outside face of the resilient lining is in conformity with an outer circumferential face of the folding cylinder. Further, one end of the arc member is rotatably attached around an axis parallel to that of the folding cylinder, and the other end of the arc member is pressed against an eccentric circumferential face by spring force. The other end side of the arc member covered with the resilient lining is projected outside the outer circumferential face of the folding cylinder and is returned to a state along the outer circumferential face of the folding cylinder by the angular displacement of the eccentric shaft.
The prior arts 1 to 3 have the following several problems to be solved. The prior art 1 is constructed by a combination of a screw coupling mechanism of the slide base and the male screw shaft arranged in parallel with the axis of the folding cylinder, a slide mechanism of the slide base and the slide plate, a cam mechanism of the inclining groove of the slide base and the cam follower of the slide plate, etc. Therefore, this construction is relatively complicated and the number of parts is increased. Further, there are many parts requiring high processing accuracy to obtain a smooth sliding operation. Therefore, problems exist in that initial cost is high and breakdown frequency tends to be high and the number of processes is increased in maintenance and repair works. Furthermore, a problem exists in that mechanical energy loss is large since many sliding operations are used.
The prior art 2 is constructed by a combination of an umbrella gear mechanism for connecting the drive shaft and the female screw shaft, a screw connecting mechanism of the female screw shaft and the male screw shaft, a link mechanism for connecting the male screw shaft and the operating shaft, a connecting mechanism to the connecting link using an upper projection formed in the operating shaft, a sliding mechanism of the connecting link, etc. Therefore, this construction is very complicated and the number of parts is large, and parts of high processing accuracy are also required to obtain a smooth sliding operation. Therefore, problems exist in that initial cost is high and breakdown frequency is high and the number of maintenance and repair processes is large. Furthermore, a problem exists in that mechanical energy loss is increased by a sliding operation.
Further, in the above prior arts 1 and 2, the thin plate-shaped member is constructed such that this thin plate-shaped member is repeatedly curved and extended. Therefore, a repeating load is applied to the thin plate-shaped member so that the thin plate shaped member is fatigued and possibility of damage of this thin plate-shaped member is high. Therefore, frequent maintenance and management are required to preve
Shibuya Kazuaki
Suzuki Seiji
Foley & Lardner
Kabushiki Kaisha Tokyo Kikai Seisakusho
Rada Rinaldi I.
Tawfik Sameh
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