Conveyors: power-driven – Conveyor section – Load simultaneously engaged between and moved by a plurality...
Patent
1995-06-29
1998-03-24
Dayoan, D. Glenn
Conveyors: power-driven
Conveyor section
Load simultaneously engaged between and moved by a plurality...
1987743, B65G 2500
Patent
active
057302782
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a transfer feeder provided for a transfer press.
BACKGROUND ART
In general, a transfer press is provided with a transfer feeder for conveying a work.
Conventional transfer feeders include one of the type in which a pair of transfer bars arranged side by side along a workpiece conveying direction are operated in three-dimensional direction, and the work is conveyed under a condition clamped by fingers disposed at positions opposed to the respective transfer bars, and another one of the type in which cross bars provided with work sucking or attracting means are mounted between the respective transfer bars, and the transfer bars are operated in two-dimensional direction to thereby convey the work.
However, in both types of the conventional transfer feeder, a driving power taken out of a press body is transmitted to a cam shaft in a cam box disposed below the transfer bars, and the two- or three-dimensional driving power is obtained by a cam mounted on the cam shaft and a lever, thereby driving the transfer bars.
As mentioned above, the conventional transfer feeders each have a structure such that the driving power is taken out of a crown portion disposed to an upper portion of the press body and then transmitted to a lower portion of the press body through the power take-out shaft. Accordingly, many members such as bevel gears are required to be disposed in a driving system, which may result in a backlash is caused due to the location of the bevel gears, for example, causing a vibration of the transfer bars and hence causing a misfeed of the work.
Furthermore, in the conventional transfer feeders, since the cam box is disposed below the transfer bars, it is necessary to form a wide pit below the press body, resulting in increased cost.
Still furthermore, in the conventional transfer feeders, it is difficult to visually observe the inside of the press body by the location of the cam box below the transfer bars, and when a worker works in the press body, it becomes difficult to enter the press body, thus causing inconvenience.
Still furthermore, in the conventional transfer feeders, the transfer bars are supported at two points of their upstream and downstream sides, so that a span between the supporting points is made long and, accordingly, it is required to use transfer bars having a high rigidity. Thus, the weight thereof increases, and hence, a lift drive mechanism for handling the transfer bars is made large and expensive, and more inconvenient.
This invention was conceived for resolving the above inconvenience and has an object of providing a transfer feeder in which a driving system is simple, a location is easy, which makes it easy to visually observe the inside of the press body, and which enables a lift drive mechanism to be small and made at a low cost.
DISCLOSURE OF THE INVENTION
The transfer feeder of the present invention was conceived in view of the above matters, and one embodiment of the present invention for achieving this and other objects provides a transfer feeder of a module-type transfer press in which a plurality of slides are disposed, a crown is divided into a plurality of crown portions for the slides, respectively, and slide drive mechanisms for driving the slides are accommodated in the crown portions, the transfer feeder being characterized in that a lift drive mechanism and a feed drive mechanism which is accommodated in a crown portion disposed on an upstream side are provided to an upper portion of a press body of the transfer press.
According to this structure, since the lift drive mechanism and the feed drive mechanism are disposed to the upper portion of the press body and the feed drive mechanism is accommodated in the upstream side crown portion, it is not necessary to locate any driving system for taking out a power between the slide drive mechanisms and the feed drive mechanism. Consequently, the misfeed to be caused by the vibration of the cross-bar due to the backlash caused in the driving system can be prevented f
REFERENCES:
patent: 4540087 (1985-09-01), Mizumoto
patent: 4555012 (1985-11-01), Baba et al.
patent: 4674624 (1987-06-01), Katoh
patent: 4823587 (1989-04-01), Wolfgang et al.
patent: 4981031 (1991-01-01), Schneider et al.
patent: 5001921 (1991-03-01), Schneider et al.
patent: 5269168 (1993-12-01), Ogawa
Baba Kiyokazu
Ogawa Masaaki
Dayoan D. Glenn
Kabushiki Kaisha Komatsu
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