Boots – shoes – and leggings
Reexamination Certificate
1993-09-16
2001-05-01
Ramirez, Ellis B. (Department: 2857)
Boots, shoes, and leggings
36, 36, 36, 36
Reexamination Certificate
active
06224249
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a compound design system in which an interactive drawing or drafting apparatus is directly connected to a complex design apparatus for generating an analysis model of mechanism parts according to drawings or drafts and producing complete drawings based on results of an analysis conducted on the analysis model.
In a conventional analysis input/output system, a system for inputting/outputting computer aided design (CAD) drawings created by a drawing apparatus (such as manufacturing and scheme drawings) is not directly coupled with an analysis system for the following reason. Namely, when the drawing system is linked with individual analysis systems, the overall system exceeds an appropriate size and hence cannot be properly used as a general-purpose system. To overcome this difficulty, data of CAD drawings is generally fed via files to the analysis input/output system to generate an analysis model based on the data. An example of this kind has been described in pages 141 to 148 of the “Computer-Aided Engineering Journal”, October 1990, by D. M. A. Lee, et al. Specifically, in accordance with this method, a three-dimensional (3D) profile is produced according to three kinds of drawings such as a front view, a side view, and a plan or top view, thereby creating a 3D analysis robot model.
On the other hand, there has been known a method in which behavior of a cam mechanism is analyzed according to an equation of a contour outline of a cam representing a locus of a contact point between the cam and a following link subordinate thereto and a restraint condition of the link. An example of this method has been described in pages 42 to 44 of the “Proceedings of 68th Conference of the Japan Society of Mechanical Engineers”, September 1990, Vol. E by Katsumi WATANABE, et al.
In addition, a method of and an apparatus for analyzing dynamic behavior of a link mechanism has been described in the JP-A-3-129476.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a compound design system and a compound design method in which mechanism parts are analyzed according to a drawing, draft, or diagram generated from a drawing apparatus to thereby easily produce an analysis model based on an analysis result.
According to one aspect of the present invention, a compound design system includes a drawing apparatus and a compound design apparatus for analyzing, in association with the drawing apparatus, a mechanism of a compound mechanism system of different mechanism parts and processing a result obtained from the analysis. The compound design apparatus includes an analysis model generating device for automatically generating, based on profiles of mechanism parts thus drawn, an equivalent link mechanism analysis model, an analysis evaluating device for converting the mechanism analysis model into data for analysis and transforming a result of an analysis into two-dimensional data, an analysis device for executing a mechanism analysis, and a drawing evaluating device for generating data to correct a result of the mechanism analysis and the drawing.
The analysis model generating apparatus produces a link mechanism model according to conditions including a contour, a dimension, a manufacturing precision, and assembly precision of each of the mechanism parts. Alternatively, the apparatus may create a link mechanism model configured with an optimal loop with respect to analysis precision and analysis time according to a profile and a posture of a link.
Furthermore, the compound design apparatus includes a first operation to associate different mechanism parts with an equivalent mechanism model, a second operation to associate drawing data with data of a mechanism analysis model, and a third operation to control data associating the drawing with a graphic image of a mechanism analysis model. The first operation includes a program to control data of line elements constituting mechanism parts, a program to associate the line element data with an equivalent link mechanism model, and data items representing profiles and dimensions. In addition, the first operation may include a program to identify a kind of each of the parts in the drawing.
Moreover, the compound design apparatus may include an automatic model generating device for generating a three-dimensional mechanism analysis model according to joints and restrictions between the mechanism parts described in at least either one of a front view, a plan view, a side view, and a cross-sectional view represented in two dimensions.
According to another aspect of the present invention, there is provided a compound design method for use with a drawing apparatus for analyzing a mechanism of a compound mechanism system of different mechanism parts and processing a result of the analysis. According to the method, for a combination of different parts, data identifying the combination of parts is read from an analysis model data control table and then a retrieval is conducted, according to the identifying data, through a data table corresponding to the analysis model data base, thereby automatically generating, according to the mechanism parts, an analysis model including links and joints.
In the compound design system according to the first aspect of the present invention, the compound design apparatus at least includes a display for displaying thereon a drawing, a data base device for storing therein reference data to conduct analyses based on the drawing, a storage for storing therein analysis data input according to the drawing, and a computing unit connected to a drawing apparatus for executing an analysis based on the drawing. The computing unit may include a drawing evaluating device for extracting a graphic image of a particular mechanism part from a drawing received from the drawing apparatus and evaluating the graphic image, an analysis model generating device for generating, according to a profile of the graphic image of the mechanism part, an analysis model having a mechanism equivalent to the graphic image, an analysis device for reading data of mechanical characteristics from the data base device, applying the data to the analysis model, and thereby executing a mechanism analysis, and an analysis evaluating device for evaluating an analysis result obtained from the analyzing apparatus. The analysis result thus evaluated by the analysis evaluating device is supplied to the drawing evaluating device, thereby evaluating the graphic image of the mechanism part.
In the data base device, there are at least stored selection rules of independent variables of joints respectively of different kinds of link mechanism parts, and cam-roller mechanism parts, and link mechanism parts, the variables being represented at least with angles and values denoting sliding amount.
The analysis model generating device extracts, when it is possible to extract structure data from the graphic image, objective structure data and accordingly selects independent variables stored in the data base device so as to obtain link mechanism part data related to the independent variables, thereby creating an analysis model having a mechanism equivalent to the link mechanism part data. Moreover, the analysis model generating device achieves a retrieval, when it is impossible to extract structure data from the graphic image, for a mechanism part graphic image similar to that stored in the data base device, generates structure data according to the graphic image thus obtained as a result of the retrieval, and then selects according thereto independent variables stored in the data base device so as to extract link mechanism part data related to the independent variables, thereby generating an analysis model having a mechanism equivalent to the link mechanism part data.
The compound design method according to the other feature of the present invention may include the following steps of extracting a graphic image of a particular mechanism part from the drawing generated by the drawing apparatus, generating an
Kitano Honami
Ozawa Hiroshi
Shiohata Koki
Yamaguchi Takashi
Antonelli Terry Stout & Kraus LLP
Hitachi , Ltd.
Ramirez Ellis B.
Wachsman Hal D.
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