Nippondenso Co., Ltd.

Masahiko Sakai

Toshihisa Taniguchi

Tadahiko Shibata

Mithuyuki Hayashi

Harukazu Matuyama

Yuuji Ito

Yasushi Oohashi

Mituyuki Hayashi

Masayuki Hiroshima

Naohiko Kondo

Yukio Ota

An apparatus for forming a field coil with a low load comprises a rotary table, a reel table to be turned together with the rotary table, six reel bars for guiding and winding a conductor into the coil according to the rotation of the rotary table, and six shaping units disposed alternately with the reel bars. The shaping units are radially movable on the rotary table. A groove-cam-type moving mechanism radially reciprocates, at a rate of one reciprocation per turn of the rotary table, the shaping units on the rotary table with predetermined phase shifts between the movements of the shaping units, thereby pushing the conductor stretched between the reel bars toward the center of the rotary table and shaping the conductor.

Shaping apparatus for forming a field coil

A winding apparatus for winding a coated wire on the drum for making a coil which is used for a stator or an alternator. A sectional shape of the wire which is introduced to the winding apparatus is circular, and the wire is deformed in order to make the sectional shape of the wire polygonal, so that the polygonal wire is fed to the bobbin in order to be wound on the bobbin. The resulting coil wound by the apparatus has an increased density.

Winding apparatus and method which deforms the wire during winding

A tension apparatus for imposing a predetermined tension on a wire-like member which is used for a stator or a alternator. First and second rollers are rotatably supported on a supporting means in such a manner that a space between the first roller and the second roller is smaller than a diameter of the wire-like member. When the wire-like member is passed through a space between a first roller and a second roller, the wire-like member is deformed, and after all, a predetermined tension is imposed on the wire-like member. The tension of the wire-like member can be changed in accordance with the space between the first roller and the second roller.

Tension apparatus

A coil assembly including a coil of material having a square or hexagonal cross section wound on a bobbin. On the coil winding surface are a plurality of first mutually parallel grooves which have a V-notch cross section and are so arranged that the centers of adjacent grooves are separated from each other by a distance of about P which is the width of said grooves. The coil winding surface also has a plurality of second mutually parallel grooves which have a V-notch cross section and are so arranged that the centers of adjacent grooves are also separated from each other by the distance P. Each of the first grooves is off-set from the corresponding second groove in the axial direction by the distance of about P/2 or less. A pair of intermediate sections with oblique grooves having a predetermined length in the circumferential direction are provided between the respective ends of the first and second grooves.

Coil assembly for polygonal wire

A method and apparatus for making axial-flow filters wherein a sectorial-shaped sheet of filter material having corrugations therein parallel to the curved ends thereof is made from a flat sheet of filter material, and thereafter the corrugated sheet is made into an annulus to obtain the final product. Initially, an edge portion of a flat sheet of filter material is attached to a sectorial-shaped mold, having a mold surface defined by curved ridges and valleys parallel to the curved ends of the mold, so that the sheet is slanted up away from the mold surface from the smaller curved end of the mold. Thereafter a set of curved forming blades is moved down toward the mold to engage the sheet and to fold it successively and consecutively across the ridges of the mold and beneath the edges of the blades into the valleys of the mold to corrugate the sheet. The corrugated sheet thus produced is made into an annulus by using a contouring belt which embraces the larger convexly curved ends of the sheet and constricts the sheet into an annulus. Thereafter the annular filter is reshaped by positioning a set of curved blades, corresponding to the valleys in one side of the filters, against the bottoms of these valleys and rotating the blades about the filter axis.

Method for making axial-flow filters and apparatus therefor

A method and apparatus for making axial-flow filters wherein a sectorial-shaped sheet of filter material having corrugations therein parallel to the curved ends thereof is made from a flat sheet of filter material in the first step, and thereafter the corrugated sheet is made into an annulus to obtain the final product. In the first step, an edge portion of a flat sheet of filter material is attached to a sectorial-shaped mold, having a mold surface defined by curved ridges and valleys parallel to the curved ends of the mold, so that the sheet is slanted up away from the mold surface from the smaller curved end of the mold. Thereafter a set of curved forming blades is moved down toward the mold to engage the sheet and to fold it successively and consecutively across the ridges of the mold and beneath the edges of the blades into the valleys of the mold to corrugate the sheet. In the second step, the corrugated sheet thus produced is made into an annulus by using a contouring belt which embraces the larger convexly curved ends of the sheet and constricts the sheet into an annulus.

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Takahama, Japan

Masahiko Sakai