Title:
ELEMENT HEAD FORMING DEVICE FOR SLIDE FASTENER AND CUTTING PUNCH
Document Type and Number:
WIPO Patent Application WO/2017/179173
Kind Code:
A1
Abstract:
[Problem] To improve the durability of a cutting punch used in sheer processing.
[Solution] This element head forming device for a slide fastener is provided with a cutting die (14) and a cutting punch (20) facing each other in a second linear direction orthogonal to a first linear direction. The cutting die and the cutting punch are each provided with a blade part (15, 21) relatively slidable in the first linear direction. Each of the pair of blade parts is provided with a blade plate part (16, 22) for shearing wire for the element heads. Protrusions (23) protruding from the blade plate parts for separating the pair of blade plate parts in the second linear direction are provided on at least one of the blade parts. Each of the pair of blade parts is provided with a sliding contact surface that faces each other in the second linear direction and is in sliding contact with each other in the position of the protrusion. Each of the pair of blade plate parts is provided with a blade surface (15a, 22a) for impacting the wire for the element head and a non-sliding contact surface (15b, 22c) crossing the blade surface. The pair of non-sliding contact surfaces is separated in the second linear direction.
Inventors:
OOTA KYUDOU (JP)
AOKI TOSHIO (JP)
TSUCHIDA SHIGERU (JP)
AOKI TOSHIO (JP)
TSUCHIDA SHIGERU (JP)
Application Number:
PCT/JP2016/062012
Publication Date:
October 19, 2017
Filing Date:
April 14, 2016
Export Citation:
Assignee:
YKK CORP (JP)
International Classes:
B21F45/18; A44B19/42; B21D53/50
Foreign References:
| JPS58116946A | 1983-07-12 | |||
| JPH071064A | 1995-01-06 | |||
| CN103386448A | 2013-11-13 | |||
| CN204686168U | 2015-10-07 |
Attorney, Agent or Firm:
MIYATA Nobumichi et al. (JP)
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