Kiyoshi Ogawa

Synthesis of Conveying Machine Satisfying Minimum Number of Layers

In the design of a planar conveying machine, individual links must be arranged separately on parallel planes, which are called layers in this paper, to avoid mutual interference among moving links during a cycle of motion. In the present study regarding a planar 6-link conveying machine, conditions which determine the minimum number of layers required for constructing the conveying machine are formulated. Moreover, in order to determine the optimum profiles of links which satisfy the minimum number of layers to avoid mutual interference among moving links, relative loci of pairing points and positions of links on the same layer during a cycle of motion are analyzed. Based on the results of analysis the planar 6-link conveying machine satisfying minimum number of layers is synthesized.

Study on Type of Layer Arrangements of Planar Eight-Bar Mechanisms Satisfying Minimum Number of Layers.

In designing planar mechanisms, individual links constructing the mechanisms must be arranged separately on parallel planes to avoid mutual interference during a cycle of motion and the mechanisms have to be constructed in the smallest space possible. In this paper, as for planar eight-bar crank mechanisms with only revolute pairs, the layer arrangement with the minimum number of layers is determined taking the conditions of construction of mechanisms and the full rotation of pairs into consideration. Furthermore, the above-mentioned numbers are applied to classify the types of the eight-bar crank mechanisms which reveal the locations of moving planes of the links and pairs.

A synthesis of spatial mechanism with minimum moving space

In the present paper, a link-arrangement system for spatial mechanisms with consideration of mutual interferences among moving links is investigated. In order to determine optimum profiles of links which satisfy the minimum moving space of the mechanisms, a rotary plane which arbitrary fixed on one of the moving link in the mechanism is introduced, and relative loci of pairing points and positions of links with this plane are analyzed. Moreover, conditions to determine link arrangements avoiding mutual interferences of moving links are formulated. Based on the above analytical results, a link-arrangement system is constructed which obtains the optimum profiles and arrangements of links of spatial mechanisms. Applying the system, a spatial 4-bar mechanism is synthesized as a practical example.