Manufacturing container or tube from paper; or other manufacturi – Bending – Folding
Reexamination Certificate
2001-07-18
2003-01-28
Kavanaugh, Ted (Department: 3728)
Manufacturing container or tube from paper; or other manufacturi
Bending
Folding
C493S003000
Reexamination Certificate
active
06511409
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a rotary drum of a folding device of a rotary press having an adjusting mechanism necessary to make an adjustment during rotation, e.g., a gripper drum of able to adjust the distance between a fixing side and an open-close side of a gripper mechanism, and a folding drum able to adjust an outside diameter of the drum.
2. Description of the Background Art
A gripper drum able to adjust the distance between a fixing side and an open-close side of a gripper mechanism is arranged in a device shown in Japanese Patent No. 2848982 (prior art 1).
In the prior art 1, two drum portions are arranged on the same axis as a shaft of the gripper drum and can be rotated around this shaft. The open-close side of the gripper mechanism is arranged in one of these two drum portions, and the fixing side of the gripper mechanism is arranged in the other. A spur gear is arranged in the shaft of the gripper drum, and a helical gear is arranged in one drum portion. These gears are individually engaged with each other. The shaft of the gripper drum and one drum portion can be integrally rotated through gears integrally rotated. The integrally rotated gears are moved in parallel with their rotation central line. Thus, one drum portion is connected to a portion around the shaft of the gripper drum by the action of a torsion angle of the helical gear such that this one drum portion can be angularly displaced. The other drum portion is arranged in a disk integrated with the shaft of the gripper drum, and is integrally and rotatably connected to the shaft of the gripper drum and the one drum portion through a gear group arranged between the one drum portion and the other drum portion. The other drum portion is also connected to a portion around the shaft of the gripper drum in a direction reverse to the one drum portion so as to be angularly displaced in accordance with the angular displacement around the shaft of the gripper drum of the one drum portion.
Helical gears having torsion in directions reverse to each other are separately arranged in accordance with the spur gear formed in the shaft of the gripper drum in the one drum portion and the other drum portion. These gears, i.e., the spur gear arranged in the shaft of the gripper drum, and the helical gear arranged in the one drum portion and the helical gear arranged in the other drum portion are individually engaged with each other. The shaft of the gripper drum and the two drum portions can be integrally rotated through gears integrally rotated. Further, the integrally rotated gears are moved in parallel with their rotation central axis. The two drum portions are connected by this movement to each other around the shaft of the gripper drum so as to be angularly displaced in directions reverse to each other by the action of a torsion angle of the helical gear.
A folding drum able to adjust its outside diameter is known in Japanese Patent No. 2788321 (prior art 2). In a device described in the prior art 2, an outer circumferential face of the folding drum having plural folding mechanisms in equal divisional positions is divided into two portions between two adjacent folding mechanisms. A portion adjacent to an upstream side of the folding mechanisms in a rotating direction of the folding drum among these two divided portions is rotatably supported with an axis parallel to that of the folding drum as a center. A rear end portion of this outer circumferential portion is movably arranged toward a radial outer side by an adjusting device as an eccentric shaft. The remaining outer circumferential portion is fixedly arranged.
In a state in which the rotation of the folding drum is stopped, the diameter of the folding drum is adjusted by individually rotating the eccentric shaft by a tool. A gear is attached to an end portion of the eccentric shaft, and a rack portion engaged with this gear is arranged. Further, an adjusting ring having a rotation center common to the folding drum and able to be rotated with respect to the folding drum is arranged. The adjusting ring is rotated with respect to the folding drum by an electric motor having this adjusting ring within the folding drum, and the respective eccentric shafts of the plural folding mechanisms are simultaneously rotated so that the outside diameter of the folding drum is adjusted.
The devices shown in the prior arts 1 and 2 have the following problems to be solved. In the device shown in the prior art 1, the two drum portions can be simultaneously rotated as if these two drum portions were integrated with the shaft of the gripper drum, Further, it is necessary to arrange a relatively large gear having the same pitch circle diameter in the gripper drum shaft and the two drum portions so as to angularly displace the rotating two drum portions around the gripper drum shaft from an outer side of the gripper drum in directions reverse to each other. Furthermore, it is necessary to arrange plural gears individually engaged with these gears and integrally rotated around the same rotation center, and arrange a mechanism for displacing these plural gears along their rotation center line while these plural gears are rotated. Therefore, the device construction becomes complicated, and failure probability is increased. Further, maintenance is complicated since many parts are assembled into a narrow space between the gripper drum and a frame. Furthermore, the number of parts is large, and processing and assembly ate complicated so that a relatively large number of processes are required, and manufacturing cost is high.
The device disclosed in the prior art 2 solves the problems caused by complication of the construction of the prior art 1 and a large number of parts. However, in the construction adjusted by a manual work using a tool, it is necessary to stop the rotation of the folding drum every adjustment, and working efficiency is extremely low. In the construction for operating the adjusting mechanism by the electric motor arranged within the folding drum, it is difficult to supply electric power to the electric motor and supply a control signal to the electric motor so that there is a fear that no accurate adjustment is made. Namely, in the construction for operating the adjusting mechanism shown in the prior art 2 by the electric motor arranged within the folding drum, there is no special device for supplying electric power to the electric motor arranged within the folding drum of a rotating body and supplying the control signal. Accordingly, it is considered that these electric power and control signal are supplied by using a general slip ring. However, this slip ring is used to supply electric power and the control signal by mechanical contact using a brush. Therefore, there are many cases in which sparks and noises are caused. Accordingly, there is a fear of generation of a fire and an error in operation of a control circuit is caused. Further, the slip ring is low in durability of the mechanical contact using the brush. One slip ring for high speed rotation sold at a market is about 300 r.p.m., and has only 20000 thousand rotations in durability. Accordingly, when this slip ring is used in the folding device of the rotary press, it is necessary to exchange or maintain the slip ring every half a year in an operation in which the folding device is operated for six hours per one day. Therefore, in the meantime, the operation of the folding device is stopped so that working efficiency is reduced.
SUMMARY OF THE INVENTION
To solve the above problems, the present invention proposes a rotary drum of a folding device comprising a reference portion having a rotating shaft and a basic body rotated integrally with the rotating shaft; an adjusted portion able to be rotated integrally with the reference portion and arranged so as to be displaced with respect to the reference portion; an adjusting operation mechanism having a driving source for displacing the adjusted portion with respect to the reference portion, a power source arranged in t
Hachiya Tadashi
Hashimoto Nobuaki
Foley & Lardner
Kabushiki Kaisha Tokyo Kikai Seisakusho
Kavanaugh Ted
LandOfFree
Rotary drum of folding device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary drum of folding device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary drum of folding device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3048257