Murata Kikai Kabushiki Kaisha

Murata Machinery, Ltd.

Hiroshi Mima

Tadashi Suzuki

Isamu Matsui

Yasuhiko Kubota

Shigeru Takasaki

Tsukasa Kawarabashi

Yoichi Nakamura

Yuji Imamura

An automatic winder that enables the number of yarn-supplying-bobbin feeding devices to be increased easily. In an automatic winder comprising an ejection passage formed therein for ejecting a bobbin conveying medium (a tray T) with a bobbin placed thereon and a feeding passage formed therein for supplying the bobbin conveying medium, the automatic winder having a plurality of installation spaces S in each of which a single winding unit U can be installed, wherein a yarn-supplying-bobbin feeding device that is compatible with the winding unit U in terms with mounting dimensions is installed in an arbitrary installation space S while the winding unit U is installed in each of the other installation spaces S so that the bobbin conveying medium ejected from the winding unit U can be received by the yarn-supplying-bobbin feeding device via the ejection passage while the bobbin conveying medium can be supplied from the yarn-supplying-bobbin feeding device to the winding unit U via the feeding passage . The number of yarn-supplying-bobbin feeding devices can be increased easily, so that for example, the number of yarn types handled by a single automatic winder can be changed easily.

Automatic winder

This invention is related to a yarn piecing apparatus of a spinning machine arranged with a holding member (12) that holds the parent yarn (Y') which is inserted in the hollow spindle (6) of the spindle member (5) which is seperated from the nozzle member (2), at a predetermined tension so that it does not rotate due to the rotating air current from the nozzle member. As the parent yarn (Y') inserted in the hollow spindle (6) of the spindle member (5) which is seperated from the nozzle member (2) is held by the holding member, there is no rotation of the parent yarn (Y') by the rotating air current and consequently, fibers can be reliably attached to the parent yarn (Y') and the success rate of yarn piecing can be increased.

Method and apparatus for piecing yarn slivers to a parent yarn in a yarn

A robot device for a piled-package type double twister, capable of detecting the condition of a pilot lamp for indicating yarn breakage, provided in a double-twisting unit which unwinds yarns from two feed packages placed one over the other, twist the yarns, winds the twisted yarn, of starting a feed package changing operation when the take-up package has a predetermined size, of continuing the feed package changing operation if a sensor for detecting the exhaustion of the feed packages detects yarn at least on one of the two feed packages, and of returning the feed packages to their positions and terminating the feed package changing operation if both the feed packages have yarns.

Robot device for piled-package type double twister

A robot apparatus for a double twister, which can travel along the units of the double twister, is provided with an operating arm for drawing a yarn end from a feed package, a suction arm for drawing a yarn end from a winding package, a yarn hook portion for hooking both the drawn yarn ends, and a piecing device for piecing both the yarn ends at the hook portion. The robot apparatus is operated to enable formation of a full winding package having a predetermined winding amount from a plurality of feed packages without requiring a yarn length counter.

Robot apparatus for double twister

In a tray conveying device comprising a guide groove for guiding both sides in a carrying direction of a disk-like tray with a yarn feed package stood upright and a drive belt for supporting a bottom of the tray to carry it along the guide groove, a roller which is guided by an upper end edge of the guide groove is provided at a position away from the center of the upper surface of the tray.

Antirotation device for tray

The present invention provides an arrangement wherein a carriage is provided so that the carriage may travel along units of a two-for-one twister disposed, the carriage comprising a yarn exchanging mechanism for exchanging an empty yarn package supported on a spindle of each unit with a yarn package, a yarn end fining mechanism for drawing a yarn end from the yarn package, a threading mechanism for inserting the yarn end into an axial hole of the yarn package by an air flow, a doffing mechanism for removing a winding package for full bundles supported on a cradle arm of each unit and supplying a paper tube to the cradle arm, and a yarn engaging mechanism for engaging the yarn end of the yarn package with the paper tube when the cradle arm supports the paper tube.

Yarn exchange and doffing device for use with a two-for-one twister

Processing robot for a two-for-one twister

An automatic doffing method for a double twister and a double twister movable along each unit of the double twister which is provided with a yarn supply package changing mechanism for replacing an empty feed package supported on a spindle of each unit with a feed package. A pick finding mechanism for drawing a yarn end from the feed package, a threading mechanism for inserting a yarn end into an axial hole of the feed package by way of an air flow, a doffing mechanism for removing a full winding package supported on the cradle arm of each unit and supplying a take-up tube to the cradle arm, and a yarn hanging mechanism for hanging a yarn end of the feed package on an empty take-up tube when the cradle arm supports the take-up tube.

Robot for a double twister

Processing robot for a two-for-one-one twister

An automatic inspecting apparatus for yarn joining device comprising a joining command mechanism which provides a drive command to a joining device in a take-up unit, a yarn sampling mechanism for cutting and holding a certain length of a sample yarn including a joint portion after joining, directly from a yarn travelling path in the take-up unit, a transfer mechanism for transferring the sample yarn up to a measuring apparatus, a setting mechanism for separating the sample yarn from the transfer mechanism and setting it to a measuring position in the measuring apparatus, and a measuring mechanism measuring characteristics of the thus-set sample yarn.

Automatic inspecting apparatus for yarn joining device

A yarn splicing nozzle unit in which ends of two yarns are spliced by applying compressed fluid thereon. A yarn splicing hole of the yarn splicing nozzle unit is divided in a axial direction thereof to form two yarn splicing chambers having their axes displaced from each other,

Yarn splicing nozzle unit

A yarn splicing device for spun yarns, wherein extremities of ends of the yarns which are inserted in overlapping and oppositely directed relationship in a yarn splicing hole are acted upon by flows of a fluid turning to be spliced with each other. The yarn splicing hole is substantially divided in an axial direction thereof into two yarn splicing holes which have center axes displaced from each other.

Splicing device for spun yarns

A spun yarn splicing device comprises a yarn splicing member having a yarn splicing hole, a fluid ejection nozzle for ejecting compressed fluid into the yarn splicing hole, and a slit opening into the yarn splicing hole for guiding yarn ends to be spliced into the yarn splicing hole, the yarn splicing hole being cylindrical in a cross section, the slit being directed tangentially to the yarn splicing hole and connected thereto at a junction, the fluid ejection nozzle opening toward a central axis of the yarn splicing hole adjacent to the junction and having a cross-sectional shape elongated in an axial direction of the yarn splicing hole. The yarn ends in the yarn splicing hole can be spliced together by the compressed fluid introduced from the fluid ejection nozzle into the yarn splicing hole.

Spun yarn splicing device

A structure of a joint of spun yarns formed by lapping the tops of two yarn ends in the untwisted state and jetting a compressed fluid to the lapped portion while keeping the tops of the yarn ends free without securing the tops of the yarn ends. In at least one portion of the joint, fibers of the two yarn ends are integrated to form one yarn having twists of the same or opposite twisting direction as or to the twisting direction of inherent twists of the spun yarn.

Growing community of inventors

Joyo, Japan

Hiroshi Mima