Conveyors: power-driven – Conveyor section – Load simultaneously engaged between and moved by a plurality...
Patent
1991-08-09
1993-04-06
Dayoan, D. Glenn
Conveyors: power-driven
Conveyor section
Load simultaneously engaged between and moved by a plurality...
1986265, B65G 1514
Patent
active
051995506
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a belt type transfer apparatus which can safely transfer to a destined location various types of objects such as columnar objects, e.g., ampules or vials filled with medical liquids, bottles or cans of foods or beverages, and so forth. More particularly, the present invention is concerned with a belt type transfer apparatus an sectional rollers used in the apparatus, wherein the arrangement of rollers and the manner in which belts are stretched around these rollers are so improved as to enable direction of transfer to be switched without requiring any change-over operation and to enable absorption of any difference in the rotation speed of the rollers which occurs at predetermined portion of the apparatus due to a change in the transfer speed.
BACKGROUND ART
Conventionally, small cylindrical medical bottles such as ampules, vials or the like are successively filled with a medical liquid in a clean room (aseptic room) by a filing machine, encased in cases and then brought to the exterior of the clean room (aseptic room).
In the production of such bottled medical liquid, it is a key for the guarantee of the quality to enhance the cleanness (asepsis) during filling. To this end, it is most convenient to minimize the volume of the clean room, while serving as much as possible the number of workers and machines in the clean room, so as to enable the bottles stuffed with the liquid to be directly conveyed to the exterior of the clean room without any manual labor.
To cope with such a demand, the applicant has proposed a belt type transfer apparatus of the type which is disclosed in Japanese Patent Laid-Open No. 62-167120.
This belt type transfer apparatus has, as shown in FIG. 9, a row of rollers 1 extending in the direction of the transfer or convey and another row of rollers 2 arranged at predetermined spacing from the first row. Belts 3 are stretched between rollers 1, 1 and also between rollers 2, 2 so that two rows of groups of belts are formed in pairs, the rollers 1 and the rollers 2 are driven by a driving system at the same speed so that objects 4 such as ampules are pinched between and transferred by the belts 3.
An example of this type of transfer apparatus will be described with reference to FIG. 10. In this belt type transfer apparatus, two rows of rollers 1 and 2 are arranged to define a path which first extends horizontally and then vertically or a path in which the objects which are being transferred are progressively turned sideways and then upright. The belts 3 are stretched over these rollers and the rollers 1 and 2 are driven at the same speed by a driving unit such as a motor which is disposed at the outlet end of the path, whereby the objects are conveyed from the clean room 6 to the exterior 8 via the intermediate chamber 7. This belt type transfer apparatus enables the objects 4 such as ampules to be safely and stably conveyed to a destined position over a long distance without requiring any specific attention to timing of the transfer, thus contributing to enhancement of the asepsis and realization of unmanned operation. This transfer system can transfer the objects 4 in any desired direction over a long distance. For changing the transfer direction, a pair of rollers 1 and 2 are provided at a corner or region where the direction is to be changed and belts 3, 3 are stretched to define the new direction of the transfer path. The distance between the rollers 1 and 2 must be maintained constant in conformity with the size of the object 4 to be transferred. This requires that the distance between the pair of the rollers 1 and 2 be delicately adjusted in accordance with the size of the object 4 to be transferred. If this adjustment is failed, troubles are caused such as collapse of the object 4 due to too narrow gap between the rollers or dropping or throwing of the object 4 due to too large gap between the rollers.
In addition, readjustment of the gap between the rollers is necessary each time the type of the object 4 to be transferred is
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Wachi Hitoshi
Yamato Houji
Dayoan D. Glenn
Nippon Kayaku Kabushiki Kaisha
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