A Pantograph Mechanism With Large-Deflective Hinges for Miniature Surface Mount Systems
In this paper, a new surface mount system with parallel arrangement miniature manipulators is proposed for use in system downsizing. The miniature manipulator consists of a molded pantograph mechanism, which is composed of large deflective hinges and link
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Precision and Intelligence Laboratory ( P & I Lab.), Tokyo Institute of Technology, Japan 2
Graduate Student of Tokyo Institute of Technology, Japan
Abstract. In this paper, a new surface mount system with parallel arrangement miniature manipulators is proposed for use in system downsizing. The miniature manipulator consists of a molded pantograph mechanism, which is composed of large deflective hinges and links, both made of the same materials. In order to create such systems, first, durability of the pantograph mechanism is to be confirmed by fatigue tests. Next, the input and output displacement characteristics of the pantograph mechanism are to be experimentally discussed. Finally, propriety of the proposed system should be confirmed.
1 Introduction Nowadays, it is difficult to meet the needs and demands for producing handy electric devices such as cellular phones due to their rapid, widespread popularity, along with the development of their minimization. Therefore, in the substrate surface mount field, there has been a strong need to speed up present surface mount systems while minimizing the size of the devices. The present surface mount system has been developed by mainly focusing on the improvement of speed functions, however resulting in enlargement of the devices. It has become almost impossible to improve the speed of the system. Therefore, we should consider a productivity increase that would be made possible by minimizing each device, while filling designated spaces to the maximum capacity. In this study, we propose a new surface mount system which consists of groups of the manipulators that have been minimized by an integral molded pantograph mechanism with hinges and links. In addition, durability against repeated input displacement is to be confirmed with large deflective hinges, even the small size of which can obtain large angular displacements. Moreover, this paper discusses minimization possibilities of a new system by a model-devised surface mount system, made possible after the experiments have clarified the input-output displacement characteristics of a model-devised integral molded pantograph mechanism.
2 Suggestions on a Surface Mount System Consisting of Groups of Miniature Manipulators The present mount system needs high structural stiffness in order to speed up functions of mounting work, which has a tendency to increase its overall size. Therefore, in this study, the new surface mount system shown in Fig. 1, is proposed based on the idea that placing as many miniature manipulators as possible within a working space should make it possible to minimize the size of devices while maintaining the present productivity. With this new surface mount system, a great number of miniature manipulators that are arranged in a parallel way, can assemble machine parts onto the substrates which simultaneously move on the belt conveyor. An integral molded pantograph mechanism [Horie, 1998 ] made of high polymer (Polypropylene) materials is used for minimizing these manipulators. Since this type of mec
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