Sewing – Special machines – Elongated article
Reexamination Certificate
1999-08-12
2001-05-29
Izaguirre, Ismael (Department: 3741)
Sewing
Special machines
Elongated article
C112S308000
Reexamination Certificate
active
06237518
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a trousersfly-serging apparatus and particularly to a rotary supply section for rotating a fly and trimming a corner portion of the fly into an arcuate shape and serging a longitudinal edge portion of the fly.
2. Description of the Related Art
As a rotary supply section in a conventional trousers-fly-serging apparatus, there are ones as disclosed in Japanese Patent Publication Laid-open No. 5-192471 and U.S. Pat. No. 5,161,474, for example. According to the apparatus of the Publications, a guide is formed continuously by bending a supply unit and a serging unit into a V shape so as to supply a fly to the serging unit from a diagonally rear direction, the fly is guided to abut on an angle of the guide, which projects toward a supply passage, and then the fly is fed forward for serging and rotated by towing a leading end portion of the fly, and a corner portion of the leading end portion of the fly is trimmed into an arcuate shape and at the same time, is serged. There is also a known rotary supply section as disclosed in Japanese Patent Publication Laid-open No. 5-137865 wherein a spherical cloth-pressing member is disposed at a position near a serging unit. The cloth-pressing member is moved down to press a portion of a supplied fly near a leading end portion and near a center on one side of the fly, and the leading end portion of the fly is towed by a pulling force by feeding of feed dogs actuated together with a needle to rotate the fly about a portion pressed by the spherical pressing member as a pivot, so that one corner portion of the leading end portion of the fly is trimmed into an arcuate shape, and at the same time, is serged.
In any of the conventional rotary supply sections, the fly is rotated by pulling the leading end portion of the fly by a pulling force of feeding of the feed dogs of the serging unit, and a pivot about which the fly rotates is a projecting angle of the guide or a point pressed by a spherical pressing member. Therefore, the towing force of the fly is liable to vary and the pivot about which the fly rotates is liable to be displaced.
As a result, the shape of the corner portion of the fly as trimmed varies, so that the uniform flies can not be necessarily obtained but irregular products are produced.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide a trousers-fly-serging apparatus in which the conventional problems are solved, one corner portion of a leading end portion of a fly can be constantly trimmed into a uniform arcuate shape, and a side end portion of the fly including the arcuate edge portion can be serged neatly.
To achieve the above object, according to the present invention, there is provided a trousers-fly-serging apparatus for supplying a trousers fly to a serging unit from a diagonally upstream direction and for rotating the supplied fly to trim one corner portion of a leading end portion of the fly into an arcuate shape, and at the same time, to serge the arcuate edge portion and one longitudinal edge portion of the fly, the apparatus comprising a supply portion of the fly including a linear supply section and a rotary supply section, wherein the rotary supply section includes a support body with a rear portion thereof being rotatable about a front end portion of the rotary supply section as a pivot, and several pressing levers are provided at a lower portion of the support body for upward and downward movements to press and retain the fly on a feed table, so that the fly fed from the linear supply section is received, and the rear portion of the support body is rotated to trim the one corner portion of the leading end portion of the fly into the arcuate shape and at the same time, to serge the arcuate edge portion and the one longitudinal edge portion of the fly.
Preferably, the support body of the rotary supply section is hung by a pin, which is rotatably supported by a support portion fixed to a proper position of the serging apparatus, is attached to the front end portion of the support body, and which functions as a rotation pivot. With this structure, a space for pressing and retaining the fly can be formed below the support body so that the fly can be easily disposed with the leading end portion thereof in contact with the serging unit.
Further preferably, the support body of the rotary supply section has, at a center of a rear portion thereof, a notch portion into which a retaining portion of the linear supply section for feeding the fly enters and fits. With this structure, four corners of the fly can be easily pressed and retained, and the pressed and retained fly can be positioned such that the leading end portion of the fly is constantly and accurately in contact with the serging unit.
Still further, it is preferable that each of the several pressing levers attached to the lower portion of the support body of the rotary supply section has, at a lower end thereof, a rotary roll rotatable only in a longitudinal direction of the fly. With this structure, the pressed and retained fly can be fed smoothly.
Still further, it is preferable that the support body of the rotary supply section includes a guide side wall hung from a lower portion of a longitudinal side portion of the support body. With this structure, the pressed and retained fly can be rotated while being pushed from a rear direction, and the fly can be fed accurately while being guided by the guide side wall.
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patent: 5161474 (1992-11-01), Ishikawa et al.
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patent: WO 91/05898 (1991-05-01), None
Igarashi Osamu
Maede Yukio
Yunoki Akio
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Izaguirre Ismael
YKK Corporation
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