Ykk Corporation

Akio Yunoki

Makoto Yamazaki

Osamu Igarashi

Yasutoshi Nozawa

Masahide Ozaki

Yutaka Yokoyama

Yukio Maede

Hiroshi Matsuzawa

Hidenori Kyozuka

A drilling apparatus, in which a hole and an insertion hole for a drilling rod are formed at a drilling position of a table and at a sheet pressing member capable of approaching or leaving a surface of the table, respectively, the drilling rod made of metal, capable of rotating at high speeds and reciprocating vertically are inserted through the both holes, the drilling rod has smooth peripheral and front end faces composed of at least part of a circular section having no blade, and a predetermined clearance is provided between the diameters of the hole and the insertion hole and the diameter of the drilling rod, whereby by pressing the drilling rod rotating at high speeds to the sheet, a sheet material is melted by frictional heat so that a beautiful hole is formed.

Drilling apparatus for flexible sheet made of thick thermoplastic material

In a trousers-fly-serging apparatus, a fly is fed on and along a feed table by a retaining portion of a linear supply section, and pressing levers attached to lower portions of four corners of a support body move down to press and retain the fed fly with tip ends of the pressing levers. Then, a rod actuated by a pressure cylinder is towed to rotate a rear portion of the support body about a pin as a pivot provided at a front end portion of the support body, so that one corner portion of a leading end portion of the fly is trimmed into an arcuate shape by a cutter and at the same time, the arcuately trimmed edge portion is serged by a needle. According to the apparatus, therefore, the one corner portion of the leading end of the fly can be trimmed into a uniform arcuate shape.

Trousers-fly-serging apparatus

Growing community of inventors

Toyama-ken, Japan

Akio Yunoki